Longxin Intelligent Lists Successfully on Beijing Stock Exchange! Dual-Driven New Development Cycle Powered by Technology Foundation & Capital EmpowermentWarm Congratulations
On the morning of July 16, 2026, Changzhou Longxin Intelligent Equipment Co., Ltd. (Stock Short Name: Longxin Intelligent, Stock Code: 920117) was officially listed on the Beijing Stock Exchange (BSE). This marks another major milestone on the capital market for Longxin Intelligent, following its successful NEEQ listing in 2024. The listing bell-ringing ceremony was grandly held at the Beijing Stock Exchange.
Ringing the Listing Bell to Embark on a New Capital Journey
On July 16, 2026, inside the trading hall of the Beijing Stock Exchange, the loud, solemn bell rang, officially launching Longxin Intelligent’s trading on the capital market.
Government officials at all levels of Changzhou, representatives of the sponsoring institution, strategic partners, and the company’s core management team gathered at the venue to witness this historic moment etched into Longxin’s development chronicle. Longxin Intelligent has officially embarked on a new high-quality development journey dual-driven by "technological innovation and capital empowerment".
Years of Accumulation Pave the Way for Capital Market Debut
Longxin Intelligent’s listing did not happen overnight. Founded in 2001, the company initially manufactured grinding equipment for traditional ink and coating materials. Amid industrial upgrades, it seized the historic opportunity of booming new energy materials and successfully transformed into a pioneer in equipment and automated production lines for preparing micro-nano high-performance composite materials.
In June 2025, Longxin Intelligent formally submitted its IPO application to the BSE, planning to raise funds for production capacity expansion and technological R&D. Despite challenges during the review process including industrial cyclical adjustments and gross margin fluctuations, the company maintained abundant pending orders and saw steady recovery in overall performance thanks to solid technical strength and a strong market reputation. It smoothly passed the review by the BSE Listing Committee on February 11, 2026.
After five months of registration and issuance preparation, Longxin Intelligent embraced its highlight moment in midsummer, completing a remarkable transformation from an NEEQ-listed enterprise to a publicly traded company on the Beijing Stock Exchange.
Innovation-Driven Development Builds Core Competitiveness
Scientific and technological innovation serves as the core engine of Longxin Intelligent’s high-quality growth and the fundamental support behind its successful listing. As a national "Specialized, Refined, Unique & Innovative Little Giant" enterprise, Longxin Group has long focused on R&D of core technologies for sand mills, three-roll mills, drying equipment and nano-material preparation, holding more than 100 invention and utility model patents in total.
Backed by robust technical capabilities, Longxin Intelligent goes beyond R&D and manufacturing of standalone equipment, extending its business to full-line integration and smart factory solutions. It delivers highly automated, digital intelligent production lines for clients, drastically boosting production efficiency and product quality. This innovation-led growth model has earned the trust of world-leading new energy enterprises including CATL and CALB, establishing Longxin as a stable and reliable core equipment supplier within the new energy industrial chain.
Capital Empowerment Draws a New Blueprint for Growth
Listing is not a destination, but a brand-new starting point for Longxin to seize opportunities in the advanced materials industry and reach new heights of development. Currently, the global new energy industry is in a critical phase of structural adjustment and technological iteration, with emerging technical routes such as solid-state batteries and sodium-ion batteries raising higher standards for upstream manufacturing equipment.
Leveraging capital market resources, Longxin Intelligent will accelerate construction of fund-raised projects and build digital factories to achieve leapfrog growth in production capacity and resolve delivery bottlenecks. Meanwhile, supported by its upgraded R&D center, the company will proactively lay out cutting-edge fields including next-generation ultrafine powder processing technologies. More importantly, the brand influence and expanded financing channels brought by the listing will help the company optimize its capital structure, lower financial costs and strengthen risk resistance. Going forward, Longxin Intelligent will adopt a more open attitude to accelerate its international layout. It will not only consolidate domestic market share, but also boldly go global to allocate resources and expand markets worldwide, enabling intelligent "Made in China" equipment to fuel the global transition to green energy.
Deep Industrial Collaboration to Forge a Shared Brighter Future
We are not merely participants in the capital market, but co-builders of the industrial chain. Longxin will continue to deepen collaborative innovation with upstream and downstream partners across the supply chain. Taking this listing as a turning point, the company will further promote the clustered development of China’s intelligent equipment manufacturing sector and polish Changzhou’s business card as the "Capital of New Energy".
Faced with broad opportunities brought by the global dual carbon goals, Longxin Intelligent will unswervingly pursue specialized, refined and differentiated development, and expand the application scope of micro-nano material preparation technologies across wider industries.
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A New Journey for Fluorine Materials: Longxin Drying Boosts Efficiency in Fluoropolymer Post-TreatmentSpring brings flourishing nature and rewarding results from long-term accumulation. At Longxin Intelligent’s Pilot & Industrialization Base for Micro-Nano Material Preparation, a spray drying test for ultrafine PVDF powder used as lithium battery binders was successfully completed for a leading fluoropolymer client. From process R&D to full production line commissioning, Longxin delivers all-round drying and purification solutions for fluoropolymer post-treatment. This landmark breakthrough not only elevates Longxin’s technical prowess in high-end fluorine material equipment to new heights, but also ushers in a new era of domestic production and intelligent manufacturing for core post-treatment processes of China’s fluoropolymer industry.
Booming Market & Prominent Pain Points: Challenges Facing Fluoropolymer Post-Treatment
The rapid expansion of global new energy, semiconductor, 5G communication and aerospace industries has generated unprecedented demand for high-performance fluoropolymer materials. Fluoropolymers have become an indispensable cornerstone of strategic emerging industries, covering PVDF binders for lithium-ion batteries, perfluorosulfonic acid (PFSA) resins for proton exchange membranes at the core of hydrogen fuel cells, as well as corrosion-resistant and heat-resistant fluoroplastics including PTFE and PFA. As applications shift toward high-end scenarios, the market imposes increasingly stringent requirements on material purity, particle size distribution, flowability and batch consistency.
Despite bright market prospects, the post-treatment of fluoropolymers has long been plagued by severe bottlenecks. Traditional drying and purification processes are plagued by high energy consumption, low solvent recovery rates, severe material agglomeration and residual impurities. Especially when handling difficult materials such as PVDF slurry and suspended PTFE powder, conventional equipment cannot balance high output and superior product quality, often resulting in inconsistent material performance or even product scrapping due to cross-contamination. In addition, volatile organic solvents and wastewater generated during fluoromaterial production pose immense pressure on environmental compliance. Breaking through process bottlenecks to realize efficient, eco-friendly and intelligent post-treatment has become a critical constraint restricting high-quality development of the fluoropolymer sector.
Longxin’s Solutions: Innovative Drying Technologies Redefine Fluoropolymer Post-Treatment Standards
To address industry pain points, backed by profound technical reserves and continuous independent innovation, Longxin Drying has rolled out a full range of customized post-treatment solutions exclusively for fluoropolymers, covering the full lifecycle from laboratory R&D to large-scale industrial mass production.
1. PVDF Slurry Gas Flow Spray Dryer: An Innovative Upgrade for Battery-Grade Binders
Catering to the extreme requirements of lithium battery-grade PVDF binders for uniform particle size, low residual solvent and superior dispersibility, Longxin’s gas flow spray dryer for PVDF slurry overcomes historic process limitations and enables intelligent production lines.
Adopting exclusive gas atomization technology, the equipment precisely controls droplet size to produce powder with ideal sphericity and narrow particle size distribution after drying.
Built-in intelligent temperature control enhances the electrochemical performance and batch stability of finished products, providing solid material support for the manufacturing of high-end power batteries.
2. Gas Flow Drying System for Suspended PTFE: Resolving Contamination and Agglomeration Issues
Due to its unique suspended properties, PTFE powder is prone to agglomeration, wall adhesion and external contamination when processed with traditional drying equipment.
Longxin’s gas flow drying system for suspended PTFE features full-link optimization spanning feed pretreatment, drying, final cooling and packaging.
A specially designed gas-solid flow field maintains PTFE particles in a highly dispersed suspended state inside the drying pipeline, enabling instantaneous heat and mass exchange to eliminate caking caused by local overheating.
A fully enclosed clean design paired with an in-line filtration system completely blocks foreign impurity ingress, delivering ultra-high-purity PTFE powder that meets the demands of semiconductors and high-end anti-corrosion applications.
3. PVDF & ETFE Flash Dryers: Intelligent Upgrades Drive Cost Reduction & Productivity Growth
For fluororubbers and resins such as PVDF and ETFE, Longxin’s intelligent flash dryers integrate advanced PLC control systems and online monitoring sensors to enable real-time regulation and automatic fault diagnosis throughout the drying process.
Equipped with high-speed crushing units, the equipment leverages instant contact between fragmented wet materials and hot air to remove surface and internal moisture within a short timeframe, drastically boosting processing capacity.
Flexible parameter settings accommodate materials with varying moisture content and viscosity, cutting unit energy consumption and labor costs to help fluororubber manufacturers achieve genuine cost reduction and efficiency improvement.
4. Closed-Loop Spray Dryer for PFSA Resins: Accelerating Large-Scale Hydrogen Energy Production
As the "heart" of hydrogen fuel cells, perfluorosulfonic acid (PFSA) resins require extremely strict environmental cleanliness and solvent recovery rates during production.
Longxin’s closed-loop spray dryer for PFSA is purpose-built for scale-up production from laboratory trials to full industrialization.
Operating under an inert gas-protected closed circulation system, the equipment prevents oxidative degradation of materials while achieving near-zero organic solvent emissions and high solvent recovery efficiency.
This groundbreaking technology resolves safety and environmental challenges hindering large-scale PFSA manufacturing and speeds up the commercialization of domestically produced proton exchange membrane materials.
5. High-Purity PFA Integrated Filter-Wash-Dry Machine: A Breakthrough in Refining & Purification Processes
For high-performance fluoromaterials such as melt-processable PTFE (PFA), Longxin’s high-purity integrated filter-wash-dry machine consolidates multiple working procedures within a single vessel.
Custom stirring structures and heating modes ensure full material dispersion during washing and uniform heating during drying, effectively removing reaction byproducts and impurity ions.
The fully enclosed, dead-space-free design satisfies ultra-high purity standards for electronic-grade and medical-grade PFA resins, setting new benchmarks for fluoropolymer refining and purification processes.
Future Outlook: Customized EPC Solutions Lead Green Intelligent Manufacturing
With years of deep engagement in advanced material purification and drying, Longxin Drying has accumulated comprehensive process expertise covering all key production stages of various materials. We recognize that clients demand far more than standalone high-performance equipment—they require systematic solutions that resolve practical production challenges and strengthen overall competitiveness.
Accordingly, Longxin delivers one-stop services including process package design, core equipment fabrication, production line integration and full EPC general contracting. Our systematic solutions are fully customized to unique production tasks and client demands, guaranteeing exceptional efficiency and reliability across the entire manufacturing workflow. Whether for new factory planning or technical transformation of outdated production lines, Longxin can deliver optimal technical roadmaps.
More importantly, all Longxin solutions adhere to the philosophy of green sustainable development. Optimized thermal utilization systems and solvent recovery technology maximize raw material utilization while minimizing water and energy consumption. This not only generates substantial economic benefits for clients, but also contributes to China’s dual carbon goals and efficient utilization of environmental resources.
A Steady & Far-Reaching New Journey for Fluorine Materials
Driven by technological innovation and guided by customer demands, Longxin Drying will continue to collaborate with partners across the fluoropolymer industry to tackle persistent post-treatment challenges. We will advance China’s fluorochemical industry toward high-end, intelligent and eco-friendly development, and jointly forge a brilliant future for fluorine material innovation.Read MoreA New Journey for Fluorine Materials: Longxin Drying Boosts Efficiency in Fluoropolymer Post-TreatmentSpring brings flourishing nature and rewarding results from long-term accumulation. At Longxin Intelligent’s Pilot & Industrialization Base for Micro-Nano Material Preparation, a spray drying test for ultrafine PVDF powder used as lithium battery binders was successfully completed for a leading fluoropolymer client. From process R&D to full production line commissioning, Longxin delivers all-round drying and purification solutions for fluoropolymer post-treatment. This landmark breakthrough not only elevates Longxin’s technical prowess in high-end fluorine material equipment to new heights, but also ushers in a new era of domestic production and intelligent manufacturing for core post-treatment processes of China’s fluoropolymer industry.
Booming Market & Prominent Pain Points: Challenges Facing Fluoropolymer Post-Treatment
The rapid expansion of global new energy, semiconductor, 5G communication and aerospace industries has generated unprecedented demand for high-performance fluoropolymer materials. Fluoropolymers have become an indispensable cornerstone of strategic emerging industries, covering PVDF binders for lithium-ion batteries, perfluorosulfonic acid (PFSA) resins for proton exchange membranes at the core of hydrogen fuel cells, as well as corrosion-resistant and heat-resistant fluoroplastics including PTFE and PFA. As applications shift toward high-end scenarios, the market imposes increasingly stringent requirements on material purity, particle size distribution, flowability and batch consistency.
Despite bright market prospects, the post-treatment of fluoropolymers has long been plagued by severe bottlenecks. Traditional drying and purification processes are plagued by high energy consumption, low solvent recovery rates, severe material agglomeration and residual impurities. Especially when handling difficult materials such as PVDF slurry and suspended PTFE powder, conventional equipment cannot balance high output and superior product quality, often resulting in inconsistent material performance or even product scrapping due to cross-contamination. In addition, volatile organic solvents and wastewater generated during fluoromaterial production pose immense pressure on environmental compliance. Breaking through process bottlenecks to realize efficient, eco-friendly and intelligent post-treatment has become a critical constraint restricting high-quality development of the fluoropolymer sector.
Longxin’s Solutions: Innovative Drying Technologies Redefine Fluoropolymer Post-Treatment Standards
To address industry pain points, backed by profound technical reserves and continuous independent innovation, Longxin Drying has rolled out a full range of customized post-treatment solutions exclusively for fluoropolymers, covering the full lifecycle from laboratory R&D to large-scale industrial mass production.
1. PVDF Slurry Gas Flow Spray Dryer: An Innovative Upgrade for Battery-Grade Binders
Catering to the extreme requirements of lithium battery-grade PVDF binders for uniform particle size, low residual solvent and superior dispersibility, Longxin’s gas flow spray dryer for PVDF slurry overcomes historic process limitations and enables intelligent production lines.
Adopting exclusive gas atomization technology, the equipment precisely controls droplet size to produce powder with ideal sphericity and narrow particle size distribution after drying.
Built-in intelligent temperature control enhances the electrochemical performance and batch stability of finished products, providing solid material support for the manufacturing of high-end power batteries.
2. Gas Flow Drying System for Suspended PTFE: Resolving Contamination and Agglomeration Issues
Due to its unique suspended properties, PTFE powder is prone to agglomeration, wall adhesion and external contamination when processed with traditional drying equipment.
Longxin’s gas flow drying system for suspended PTFE features full-link optimization spanning feed pretreatment, drying, final cooling and packaging.
A specially designed gas-solid flow field maintains PTFE particles in a highly dispersed suspended state inside the drying pipeline, enabling instantaneous heat and mass exchange to eliminate caking caused by local overheating.
A fully enclosed clean design paired with an in-line filtration system completely blocks foreign impurity ingress, delivering ultra-high-purity PTFE powder that meets the demands of semiconductors and high-end anti-corrosion applications.
3. PVDF & ETFE Flash Dryers: Intelligent Upgrades Drive Cost Reduction & Productivity Growth
For fluororubbers and resins such as PVDF and ETFE, Longxin’s intelligent flash dryers integrate advanced PLC control systems and online monitoring sensors to enable real-time regulation and automatic fault diagnosis throughout the drying process.
Equipped with high-speed crushing units, the equipment leverages instant contact between fragmented wet materials and hot air to remove surface and internal moisture within a short timeframe, drastically boosting processing capacity.
Flexible parameter settings accommodate materials with varying moisture content and viscosity, cutting unit energy consumption and labor costs to help fluororubber manufacturers achieve genuine cost reduction and efficiency improvement.
4. Closed-Loop Spray Dryer for PFSA Resins: Accelerating Large-Scale Hydrogen Energy Production
As the "heart" of hydrogen fuel cells, perfluorosulfonic acid (PFSA) resins require extremely strict environmental cleanliness and solvent recovery rates during production.
Longxin’s closed-loop spray dryer for PFSA is purpose-built for scale-up production from laboratory trials to full industrialization.
Operating under an inert gas-protected closed circulation system, the equipment prevents oxidative degradation of materials while achieving near-zero organic solvent emissions and high solvent recovery efficiency.
This groundbreaking technology resolves safety and environmental challenges hindering large-scale PFSA manufacturing and speeds up the commercialization of domestically produced proton exchange membrane materials.
5. High-Purity PFA Integrated Filter-Wash-Dry Machine: A Breakthrough in Refining & Purification Processes
For high-performance fluoromaterials such as melt-processable PTFE (PFA), Longxin’s high-purity integrated filter-wash-dry machine consolidates multiple working procedures within a single vessel.
Custom stirring structures and heating modes ensure full material dispersion during washing and uniform heating during drying, effectively removing reaction byproducts and impurity ions.
The fully enclosed, dead-space-free design satisfies ultra-high purity standards for electronic-grade and medical-grade PFA resins, setting new benchmarks for fluoropolymer refining and purification processes.
Future Outlook: Customized EPC Solutions Lead Green Intelligent Manufacturing
With years of deep engagement in advanced material purification and drying, Longxin Drying has accumulated comprehensive process expertise covering all key production stages of various materials. We recognize that clients demand far more than standalone high-performance equipment—they require systematic solutions that resolve practical production challenges and strengthen overall competitiveness.
Accordingly, Longxin delivers one-stop services including process package design, core equipment fabrication, production line integration and full EPC general contracting. Our systematic solutions are fully customized to unique production tasks and client demands, guaranteeing exceptional efficiency and reliability across the entire manufacturing workflow. Whether for new factory planning or technical transformation of outdated production lines, Longxin can deliver optimal technical roadmaps.
More importantly, all Longxin solutions adhere to the philosophy of green sustainable development. Optimized thermal utilization systems and solvent recovery technology maximize raw material utilization while minimizing water and energy consumption. This not only generates substantial economic benefits for clients, but also contributes to China’s dual carbon goals and efficient utilization of environmental resources.
A Steady & Far-Reaching New Journey for Fluorine Materials
Driven by technological innovation and guided by customer demands, Longxin Drying will continue to collaborate with partners across the fluoropolymer industry to tackle persistent post-treatment challenges. We will advance China’s fluorochemical industry toward high-end, intelligent and eco-friendly development, and jointly forge a brilliant future for fluorine material innovation.Read MoreLongxin Drying Delivers Higher-Efficiency Post-Treatment for Fluoropolymer MaterialsAs spring unfolds and enterprises build momentum for growth, Longxin Intelligent’s Pilot & Industrialization Base for Micro-Nano Material Preparation recently completed a successful spray drying test on ultrafine PVDF powder for lithium battery binders, developed to meet the demands of a leading fluoropolymer manufacturer. Precise particle size control, outstanding batch consistency and ultra-low impurity levels once again demonstrate Longxin Drying’s profound technical expertise in fluoropolymer post-processing.
From process R&D to full production line commissioning, Longxin Drying has consistently provided global customers with comprehensive fluoropolymer post-treatment solutions covering core processes including drying and purification, jointly charting a new course for fluorine material industrial applications.
Market Expansion Creates Dual Pressures: Higher Quality & Greater Efficiency for Fluoropolymer Post-Treatment
Driven by rapid growth of strategic emerging industries including new energy, semiconductors, 5G communications and aerospace, fluoropolymers—critical advanced chemical materials—are experiencing unprecedented market opportunities:
As one of the most widely used fluororesins, PTFE faces urgent demand for domestic substitution in high-end semiconductor and medical sectors;
Fueled by explosive growth in lithium batteries, PVDF has become the core cathode binder material, with its market scale projected to exceed RMB 10 billion;
Rising investment in hydrogen energy has drawn widespread attention to the localized production of perfluorosulfonic acid (PFSA) resins, the core material for proton exchange membranes;
High-performance fluoropolymers such as FEP, PFA and ETFE see expanding applications in premium cables, semiconductor clean systems and photovoltaic encapsulation.
Market requirements for material performance keep rising: finer particle sizes, superior purity, stable molecular structures and consistent batch quality. Nevertheless, traditional post-treatment workflows, especially drying and purification, have become major bottlenecks restricting industrial upgrading:
Difficult quality control
Temperature-sensitive materials like PVDF suffer thermal decomposition and crystal form transformation under unstable temperatures in conventional dryers, impairing binder performance. PTFE suspension resin tends to agglomerate and stick to equipment walls during drying, with risks of metallic contamination, failing to meet strict cleanliness standards for high-end applications.
Severe safety and environmental burdens
Fluoropolymer production commonly uses organic solvents such as NMP and ethanol. Conventional open drying leads to massive solvent loss, elevated production costs and fire & explosion hazards. Meanwhile, fluorinated substances may release corrosive gases under high temperatures, damaging equipment and polluting the environment.
Low production efficiency & limited automation
Traditional batch operations rely heavily on manual labor with low throughput. End-to-end precise process control remains difficult, failing to satisfy stability and uniformity requirements for large-scale industrial manufacturing.
Longxin’s Solutions: Innovative Drying Technologies Balance High Throughput & Superior Product Quality
Drawing on in-depth research into fluorine material properties and decades of process experience, Longxin Drying has launched a full lineup of innovative post-treatment solutions for diverse fluoropolymers, raising industry benchmarks with cutting-edge equipment technologies.
1. PVDF Slurry Gas Flow Spray Dryer: Revolutionizing Intelligent Production Lines for Battery-Grade Binders
To meet the trend toward ultrafine PVDF binder powder, Longxin developed its new-generation gas flow spray dryer:
Equipped with high-pressure two-fluid atomization technology, high-speed shear from compressed air atomizes high-viscosity slurry into uniform droplets of 5–20 μm;
PID intelligent regulation precisely matches the thermal stability of PVDF molecular chains, preserving β crystal forms to guarantee high pole piece peel strength;
The fully closed system features 200-mesh precision filtration and 316L mirror-polished inner surfaces, limiting finished product impurities to ppm levels. An intelligent PLC system enables fully automatic closed-loop operation from feeding to powder output, delivering stable, high-quality production line equipment for the billion-yuan binder market.
2. PTFE Suspension Gas Flow Drying System: Full-Link Optimization Solves Contamination & Agglomeration Issues
Tailored to PTFE suspension resin’s high adhesion, agglomeration tendency and strict cleanliness requirements, Longxin’s fully optimized gas flow drying system features:
Adjustable Venturi feeding technology to eliminate pipeline blockages;
Main dryer with large-radius curved piping (no right-angle elbows) and mirror-polished inner walls (Ra ≤ 0.4 μm) to remove dead zones and prevent material buildup and wall adhesion;
Custom automatic flip plate valves replacing conventional rotary discharge valves, eliminating contamination from lubricants and friction debris at the source;
Integrated multi-stage air purification (Class 100,000 clean standard) and cooling sections. Materials are instantly dehydrated to moisture content below 0.1% within 2–3 seconds and rapidly cooled to under 40 °C for easy packaging, clearing key hurdles for domestic high-quality PTFE production.
3. PVDF & ETFE Flash Dryers: Intelligent Upgrades Cut Costs & Boost Output for Fluororubber Manufacturing
Longxin flash dryers are ideal for filter cake, paste-like PVDF, ETFE intermediates and fluororubber materials:
Integrated crushing and drying units: high-speed disintegrators instantly break up wet materials, which fully contact tangentially fed hot air for fluidized drying;
Intelligent temperature control and frequency conversion precisely adjust outlet moisture and fineness, slashing energy consumption vs. conventional equipment and lifting throughput, offering an energy-efficient, high-yield route for mass production of fluororubbers and modified fluoromaterials.
4. Closed-Loop Spray Dryer for PFSA Resins: Scaling Up Hydrogen Fuel Cell Proton Exchange Membrane Materials from Lab to Mass Production
Addressing core bottlenecks for hydrogen energy materials, Longxin’s closed-loop spray dryer serves as pivotal equipment for industrialized PFSA manufacturing:
Inert nitrogen circulation paired with online oxygen analyzers maintains oxygen content below 1%, fundamentally eliminating explosion risks from organic solvents and oxidative degradation of sulfonic acid side chains;
Low-temperature drying (<150 °C) safeguards the integrity of fluorocarbon backbones;
High-efficiency multi-stage condensation recovers over 95% of solvents to drastically reduce production costs.
This equipment enables domestic proton exchange membrane manufacturers to cross the final threshold from laboratory R&D to large-scale mass production.
5. High-Purity PFA Filter-Wash-Dry Integrated Machine: Breakthrough Post-Treatment Technology for Premium Fluoropolymer Refining
Semiconductor-grade PFA demands near-zero metallic impurities and particulate contaminants. Longxin’s all-in-one filter-wash-dry machine completes enclosed filtration, precision washing, vacuum drying and automatic discharging within a single vessel:
All product-contact surfaces feature high-precision mirror polishing and passivation to prevent metal ion leaching;
Fully enclosed material transfer avoids external contamination. Combined with advanced washing and vacuum drying technologies, the system delivers semiconductor-grade PFA with ultra-high cleanliness and low extractables, setting new industry standards for high-end fluoropolymer refining.
Looking Ahead: Full-Process Expertise Drives Industrial Upgrading of Fluoropolymers
Beyond standalone equipment, years of specialization in advanced material purification and drying have equipped Longxin Drying with comprehensive process know-how covering full production workflows. Clients gain access not only to high-performance single machines, but also customized production lines and EPC turnkey solutions.
Our integrated system solutions cover process package development, equipment selection, system integration and automatic control, customized to unique client requirements for high-efficiency, consistent full-process manufacturing from raw materials to finished goods. The solutions maximize raw material utilization, while thermal cycle recovery, solvent recycling and intelligent controls minimize water and energy consumption. This delivers substantial economic benefits for clients and supports sustainable resource utilization.
“Forging a New Era for Fluorine Materials” — Longxin Drying strives to be a trusted partner for fluoropolymer manufacturers through continuous technological innovation and complete solution portfolios. Together, we break technical barriers and embrace a promising new age of new energy and advanced materials.Read More
A New Journey for Fluorochemicals: Longxin Drying Elevates Post-Processing Efficiency of Fluoropolymer MaterialsSpring arrives with thriving foliage and warbling birds, a season where long-term accumulation culminates in remarkable breakthroughs. At Longxin Intelligent’s pilot base for the engineering and industrialized production of micro & nano materials, spray drying tests on ultra-fine PVDF lithium-ion battery binder powder for a leading fluoropolymer client achieved full success. From process R&D to full-line commissioning, Longxin delivers comprehensive drying and purification solutions for fluoropolymer post-processing. This landmark milestone not only marks a new leap in Longxin’s technical prowess in high-end fluoromaterial equipment, but also signals a new dawn of domestic and intelligent manufacturing for the critical post-processing links of China’s fluoropolymer industry.
Blue Ocean Market Paired with Persistent Pain Points: Challenges in Fluoropolymer Post-Processing
Currently, the rapid expansion of global new energy, semiconductor, 5G communication and aerospace industries has generated unprecedented demand for high-performance fluoropolymer materials. Ranging from PVDF binders in lithium-ion batteries, perfluorosulfonic acid resin (PFSA) proton exchange membranes — the core component of hydrogen fuel cells, to corrosion-resistant and heat-resistant fluoroplastics such as PTFE and PFA, fluoropolymer macromolecules have become an indispensable cornerstone of strategic emerging industries. As application scenarios advance toward high-end segments, the market imposes increasingly stringent standards for material purity, particle size distribution, flowability and batch consistency.
Despite broad market prospects, fluoropolymer post-processing has long been plagued by severe challenges. Conventional drying and purification processes suffer from high energy consumption, difficult solvent recovery, severe particle agglomeration and excessive residual impurities. Especially when handling difficult materials like PVDF slurry and suspended PTFE powder, existing equipment fails to balance high throughput and premium quality, often resulting in unstable product performance or even scrapped batches due to cross-contamination. In addition, volatile organic solvents and wastewater generated during fluoromaterial production impose heavy compliance burdens on environmental protection. Breaking through these process bottlenecks to realize efficient, eco-friendly and intelligent post-processing has become a critical pain point restricting the high-quality development of the fluoropolymer sector.
Longxin Custom Solutions: Innovative Drying Technology Redefines Fluoropolymer Post-Processing Standards
To address industry-wide pain points, backed by profound technical reserves and sustained independent innovation, Longxin Drying has rolled out a series of tailor-made post-processing solutions exclusively for fluoropolymers, covering the full lifecycle from laboratory R&D to large-scale industrial mass production.
1. PVDF Slurry Airflow Spray Dryer: A Revolutionary Upgrade for Battery-Grade Binders
Meeting the extreme requirements of lithium battery-grade PVDF binders for uniform particle size, low residual solvent and superior dispersibility, Longxin’s PVDF slurry airflow spray dryer transforms former process bottlenecks into intelligent production lines.
① Equipped with proprietary airflow atomization technology, it precisely controls droplet size to produce powders with ideal sphericity and narrow particle size distribution after drying.
② Built-in intelligent temperature regulation optimizes the product’s electrochemical performance and batch consistency, delivering reliable material support for high-end power battery manufacturing.
2. Suspended PTFE Airflow Drying System: Eliminating Contamination and Agglomeration Bottlenecks
Due to its unique suspended particle properties, PTFE powder is highly prone to agglomeration, wall adhesion and external contamination in traditional drying workflows.
① Longxin’s suspended PTFE airflow drying system implements full-process optimization from feed pretreatment to final cooling and packaging.
② Its specially engineered gas-solid flow field maintains PTFE particles in a highly dispersed suspended state inside the drying pipeline, enabling instant heat and mass exchange to eliminate caking caused by local overheating.
③ The fully enclosed clean design and inline filtration system completely block foreign impurity intrusion, yielding ultra-high-purity PTFE powder ideal for semiconductors and high-end anti-corrosion applications.
3. PVDF & ETFE Flash Dryer: Intelligent Upgrade for Cost Reduction & Productivity Growth
For fluororubber and resin materials including PVDF and ETFE, Longxin’s intelligent flash dryer integrates advanced PLC control systems and online monitoring sensors to enable real-time drying process adjustment and automatic fault diagnosis.
① High-speed crushing units work in tandem with instant hot air contact to rapidly remove surface and internal moisture from materials, drastically boosting processing capacity.
② Flexible parameter settings accommodate feedstock with varying moisture content and viscosity, cutting energy and labor costs per unit output and enabling genuine cost and efficiency gains for fluororubber manufacturers.
4. PFSA Closed-Circuit Spray Dryer for Perfluorosulfonic Acid Resin: Empowering Large-Scale Hydrogen Energy Production
As the "heart" of hydrogen fuel cells, the production of perfluorosulfonic acid resin (PFSA) demands near-perfect standards for environmental cleanliness and solvent recovery rates.
① Longxin’s PFSA closed-circuit spray dryer is engineered for production scaling from laboratory trials to full industrialization.
② Operating under an inert gas-protected closed circulation loop, the system prevents material oxidation and deterioration while achieving zero organic solvent emissions and ultra-high solvent recovery rates.
This groundbreaking technology resolves safety and environmental hurdles in large-scale PFSA manufacturing, accelerating the commercialization of domestically produced proton exchange membrane materials.
5. High-Purity PFA Filter-Wash-Dry All-in-One Unit: A Breakthrough for Refining & Purification Workflows
Developed for high-performance fluoromaterials such as melt-processable PTFE (PFA), Longxin’s high-purity integrated filter-wash-dry unit consolidates multiple sequential processes within a single piece of equipment.
① Its specialized stirring structure and heating design ensure full material dispersion during washing and uniform heating during drying, thoroughly removing reaction byproducts and impurity ions.
② The sealed, dead-space-free construction meets the ultra-high purity criteria for electronic-grade and medical-grade PFA resin, establishing a new benchmark for fluoropolymer refining and purification processes.
Looking to the Future: Custom EPC Solutions Lead Green Intelligent Manufacturing
With years of dedicated R&D in new material purification and drying, Longxin Drying has accumulated in-depth process expertise spanning every link of material production. We recognize that clients require far more than a single advanced machine — they demand systematic solutions that resolve practical production challenges and boost overall competitiveness.
Accordingly, Longxin delivers end-to-end services ranging from process package design and core equipment fabrication to production line integration and full EPC general contracting. Our system solutions are fully customized for specific manufacturing tasks, precisely matching unique client requirements to deliver maximum efficiency and reliability across the entire workflow. Whether planning new greenfield factories or technical retrofits for existing production lines, Longxin devises the optimal technical roadmap.
More importantly, all Longxin solutions adhere to the philosophy of green sustainable development. Optimized heat utilization systems and solvent recovery technology enable nearly complete raw material utilization while minimizing water and energy consumption. This not only delivers substantial economic benefits for clients, but also contributes to the national dual-carbon goals and efficient utilization of environmental resources.
Embark on a New Fluorochemical Journey, Forge Steady Progress for Long-Term Growth
Driven by technological innovation and guided by customer demands, Longxin Drying will continue to collaborate with partners across the fluoropolymer industry to jointly overcome post-processing challenges. We will advance China’s fluorochemical sector toward high-end, intelligent and eco-friendly manufacturing, co-creating a brilliant future for fluoromaterial development.
Translation Notes
Standard Industrial Terminology
PVDF = Polyvinylidene Fluoride; PTFE = Polytetrafluoroethylene; PFA = Perfluoroalkoxy; PFSA = Perfluorosulfonic Acid Resin; EPC = Engineering, Procurement & Construction
Slogan & Literary Adaptation
"氟启新程 行稳致远" translated as Embark on a New Fluorochemical Journey, Forge Steady Progress for Long-Term Growth to retain corporate thematic meaning for industrial marketing copy.
Typo Correction Handling
Original informal typos are converted to standard formal English without altering core technical information.
Tone Consistency
Maintained formal B2B industrial publicity style, consistent with prior powder metallurgy and fluoromaterial articles, fully retaining all technical logic and product highlights.
Industry Nomenclature Uniformity
Filter-Wash-Dry All-in-One Unit, Closed-Circuit Spray Dryer, Flash Dryer adopt globally recognized standard naming conventions for powder processing equipment.Read MoreA New Journey for Fluorochemicals: Longxin Drying Boosts Efficiency in Post-Processing of Fluoropolymer MaterialsAs spring brings thriving vitality and a season of fruitful breakthroughs, Longxin Intelligent’s engineering and industrialization pilot base for micro & nano material manufacturing recently achieved full success in spray drying tests on ultra-fine PVDF lithium battery binder powder, developed to meet the demands of a leading fluoropolymer enterprise. Precise particle size control, outstanding batch consistency and ultra-low impurity content once again demonstrate Longxin Drying’s profound technical expertise in fluoropolymer post-processing.
From process route development to smooth commissioning of complete production lines, Longxin Drying has consistently delivered all-round post-processing solutions for fluoropolymer materials covering core procedures such as drying and purification to global clients, embarking on a brand-new chapter in fluoromaterial application alongside the industry.
Surging Market Demand: Dual Challenges of Quality Improvement & Efficiency Boost for Fluoropolymer Post-Processing
Driven by rapid growth of strategic emerging industries including new energy, semiconductors, 5G communications and aerospace, fluoropolymers, as critical new chemical materials, are embracing unprecedented development opportunities:
As a widely adopted fluororesin, PTFE faces urgent demand for domestic substitution in high-end semiconductor and medical sectors.
Fueled by explosive expansion of lithium battery industry, PVDF has become a core cathode binder, with its market scale projected to exceed 10 billion RMB.
Amid the booming hydrogen energy sector, perfluorosulfonic acid resin (PFSA), the core material for proton exchange membranes, draws widespread attention for its domestic industrialization progress.
High-performance fluoromaterials including FEP, PFA and ETFE see expanding applications in high-end cables, semiconductor clean systems, photovoltaic encapsulation and other fields.
Market requirements for material performance keep escalating toward ultra-fine particle size, ultra-high purity, stable molecular structure and superior batch consistency. Nevertheless, traditional post-processing workflows, especially drying and purification steps, have become core bottlenecks holding back industrial upgrading:
Difficult quality control: Temperature-sensitive materials such as PVDF tend to suffer thermal decomposition and crystal transformation inside conventional dryers due to drastic temperature fluctuations, degrading adhesive performance. PTFE suspension resin is prone to extrusion agglomeration and wall adhesion during drying, with risks of foreign metal contamination, failing to meet strict cleanliness standards of high-end applications.
Severe safety & environmental pressures: Fluoropolymer manufacturing frequently involves organic solvents such as NMP and ethanol. Conventional open drying leads to massive solvent loss and higher production costs, alongside fire and explosion hazards. Moreover, fluorinated substances may release corrosive gas under high temperature, posing threats to equipment and the environment.
Low production efficiency & limited automation: Traditional processes mostly adopt batch operation with heavy manual reliance and low throughput. Full-process precise control from feeding to discharging cannot be realized, failing to satisfy stability and consistency requirements of large-scale industrial mass production.
Longxin Custom Solutions: Innovative Drying Technology Balances High Output & Premium Product Quality
To tackle the above challenges, drawing on in-depth understanding of fluoromaterial properties and decades of process experience, Longxin Drying has launched a series of innovative solutions covering post-processing of various fluoropolymers, reshaping industrial benchmarks with advanced equipment technology.
1. PVDF Slurry Airflow Spray Dryer: Revolutionizing Production of Battery-Grade Binders from Process Bottleneck to Intelligent Production Line
Tailored to the trend of ultra-fine pulverization of PVDF binders, Longxin developed a new-generation airflow spray dryer:
① Equipped with high-pressure two-fluid atomization technology, high-speed shear force from compressed air stably atomizes high-viscosity slurry into uniform droplets of 5–20 μm.
② Integrated PID intelligent regulation precisely matches the thermal stability requirements of PVDF molecular chains, effectively preserving β crystal form and guaranteeing cathode sheet peel strength.
③ The complete system adopts 200-mesh precision filtration and 316L mirror-polished inner walls, strictly limiting finished product impurity content to ppm level. An intelligent PLC system realizes fully automatic closed-loop control from feeding to powder discharging, supplying high-quality, highly stable intelligent line equipment for the billion-yuan binder market.
2. Suspended PTFE Airflow Drying System: Full-Link Optimization from Feeding to Cooling to Eliminate Contamination & Agglomeration of PTFE Powder
Developed for PTFE suspension resin featuring strong adhesion, severe agglomeration tendency and stringent cleanliness requirements, this fully optimized airflow drying system delivers multiple advantages:
① Adopts adjustable Venturi feeding technology to effectively prevent pipeline blockage.
② The main drying unit eliminates right-angle elbows, featuring large-curvature pipelines and mirror-polished inner walls (Ra ≤ 0.4 μm) to remove material dead zones and avoid wall adhesion & material accumulation.
③ An innovatively designed automatic flap valve replaces traditional rotary discharge valves, fundamentally eliminating product contamination by lubricants and friction debris.
④ Integrated multi-stage air purification (up to Class 100,000 cleanroom standard) and cooling sections achieve instant dehydration within 2–3 seconds to moisture content below 0.1%, followed by rapid cooling to under 40 ℃ for easy packaging, clearing critical obstacles for domestic production of high-quality PTFE.
3. PVDF & ETFE Flash Dryer: Intelligent Upgrade to Cut Costs & Boost Efficiency for Fluororubber Production
Longxin flash dryers serve as the optimal choice for filter cake/paste-like PVDF, ETFE intermediates and fluororubber materials:
① Combining crushing and drying functions, high-speed pulverizers instantly disperse wet materials, which fully contact tangentially fed hot air to realize fluidized drying.
② Intelligent temperature control and frequency conversion regulation precisely adjust outlet moisture content and fineness, slashing energy consumption and lifting production efficiency compared with conventional equipment, offering an energy-saving, high-throughput pathway for mass production of fluororubber and modified fluoromaterials.
4. PFSA Closed-Circuit Spray Dryer for Perfluorosulfonic Acid Resin: From Lab R&D to Industrialization, Supporting Mass Production of Hydrogen Fuel Cell Proton Exchange Membrane Materials
Addressing the core bottleneck of hydrogen energy materials, Longxin closed-circuit spray dryers act as pivotal equipment for large-scale PFSA manufacturing:
① Nitrogen serves as the inert circulating medium, paired with an online oxygen concentration analyzer to strictly control oxygen content below 1%, fundamentally eliminating fire/explosion risks of organic solvents and oxidative degradation of sulfonic acid side chains on resin molecules.
② Precision low-temperature drying technology (<150 ℃) safeguards the integrity of fluorocarbon backbones.
③ A high-efficiency multi-stage condensing recovery system recovers over 95% of solvents, drastically cutting production costs.
This equipment bridges the final gap between laboratory research and mass production for domestic proton exchange membrane manufacturers.
5. High-Purity PFA Filter-Wash-Dry All-in-One Unit: Breakthrough Post-Processing Tech for High-Performance Fluoromaterials, Reinventing Purification Processes for Fluoropolymers
Semiconductor-grade PFA demands zero tolerance for metal impurities and particulate contaminants. Longxin integrated filter-wash-dry units complete full-process closed operations including high-efficiency filtration, precision washing, vacuum drying and automatic discharging within a single sealed vessel:
① All inner walls and material contact surfaces undergo high-precision mirror polishing and passivation treatment to prevent metal ion precipitation.
② Sealed material transfer design blocks external contamination. Combined with high-efficiency washing and vacuum drying technology, the unit delivers PFA products meeting semiconductor-grade ultra-high cleanliness and low leaching standards, setting a new benchmark for purification workflows of high-end fluoromaterials.
Looking Ahead: Full-Value-Chain Processes to Drive Industrial Upgrading of Fluoropolymers
With years of dedicated research in new material purification and drying, Longxin Drying offers far more than standalone equipment — we possess in-depth process expertise covering every segment of material production. Clients gain access not only to high-performance individual machines, but also fully customized production lines and EPC general contracting solutions.
From process package development, equipment selection and system integration to automated control, our system solutions are precisely tailored to unique client demands, ensuring ultra-high efficiency and reliable quality across the entire workflow from raw material input to finished products. Our solutions maximize raw material utilization, while minimizing water and energy consumption via efficient heat circulation, solvent recovery and intelligent control systems. This not only delivers substantial economic benefits for clients, but also advances sustainable utilization of environmental resources.
Embark on a New Journey for Fluorochemicals
Committed to continuous technological innovation and comprehensive solution portfolios, Longxin Drying aims to be a trusted partner for fluoropolymer manufacturers. Together we will break through technical barriers and embrace a brilliant new era of new energy and advanced new materials.Read More
Longxin Intelligent Forges a New Future for Powder Metallurgy Materials with Customized SolutionsIn high-end manufacturing sectors including core component production for aerospace, precision structural forming for new energy vehicles, and innovative applications of 3D printing, powder alloy materials play an irreplaceable pivotal role. The performance of diversified products such as superalloys, spherical alloy powders, 3D printing alloys, thermal spray alloys and electrode alloys directly determines the reliability and cutting-edge performance of end equipment. With the in-depth application of additive manufacturing technology in aerospace, automotive, new energy and high-end manufacturing fields, 3D printing alloy powder materials are undergoing rapid iteration and groundbreaking breakthroughs. Constantly emerging materials featuring stronger performance, higher adaptability and superior forming efficiency enable the manufacturing of complex parts, lightweight structures and integrated functional components. As a leading intelligent drying solution provider in the industry, Longxin Drying devotes itself to the R&D of precision drying technology. It addresses industrial pain points through a customized equipment portfolio, injecting robust momentum into the high-quality development of the powder metallurgy sector.
Surging Market Demand & Development Trends: A New Wave of Quality Upgrade for Powder Alloys
Currently, the global powder metallurgy industry is in a phase of rapid expansion with multi-dimensional explosive market demand. In aerospace, engine turbine blades and spacecraft structural components impose extreme requirements on the high-temperature resistance and fatigue resistance of superalloys. The rise of the new energy vehicle industry drives the large-scale application of lightweight, high-strength powder metallurgy parts. The maturity of 3D printing additive manufacturing technology turns alloy powders with high sphericity, excellent flowability and uniform composition into scarce resources. Segments such as thermal spraying and electrode manufacturing also set stricter standards for powder indicators including particle size distribution, purity control and stability.
In terms of development trends, powder alloy materials are evolving toward four major directions: ultra-coarsening, low oxidation, high adaptability and eco-friendliness.
Ultra-coarse particle alloys boast both high toughness and wear resistance, leading to skyrocketing demand in mining tools and heavy-duty cutting fields.
Nano-scale powder materials, with outstanding physical and chemical properties, serve as core raw materials for high-end manufacturing.
Products with low oxygen content and high consistency are critical to guarantee the forming quality of downstream processing.
Tightening environmental regulations and enterprises’ pursuit of cost reduction and efficiency improvement have made green, energy-saving and eco-efficient production processes a universal consensus across the industry, which also points out the direction for technological innovation of drying equipment.
Prominent Bottlenecks of Traditional Drying Processes: The Industry Urgently Needs Breakthrough Solutions
As a core procedure in powder alloy preparation, drying directly affects key material properties including composition uniformity, oxygen content, particle morphology and flowability. Nevertheless, traditional drying processes expose numerous pain points when coping with complex requirements of diverse powder alloys, severely restricting the improvement of product quality.
Control of composition uniformity: Traditional open drying environments leave materials highly vulnerable to contamination by external impurities, resulting in severe product pollution and undermining the purity and consistency of mixed powders.
Insufficient wet grinding or slurry stratification in some processes easily causes uneven distribution of WC particles and Co binder phase, local Co agglomeration or abnormal coarsening of WC grains, which reduces alloy strength. Oxygen content control remains a prevalent industry challenge. Conventional processes cannot avoid direct contact between high-temperature materials and air, leading to excessive oxygen content in finished products, increased forming difficulty and shortened shelf life of mixed powders.
Optimization of particle morphology and flowability: Traditional equipment fails to precisely adjust drying parameters, yielding powders with uneven particle size, poor sphericity and insufficient flowability. This causes inconsistent green compact density, and defects such as cracks or uneven density after sintering.
For special powders that are heat-sensitive, highly viscous and prone to agglomeration, traditional drying equipment also suffers from issues including crystal form damage, material adhesion and low drying efficiency. In addition, traditional processes feature low automation, high energy consumption and cumbersome operation. They not only raise production costs but also struggle to stabilize product quality, failing to meet production demands for high-end powder alloys.
Precision Drying: Custom Design Precisely Matches Diverse Material Characteristics of Powder Alloys
Targeting the material properties and process requirements of various powder alloys, Longxin Drying has developed a full lineup of precision drying equipment. Six core products deliver full-scenario coverage ranging from ultra-coarse particles to nano-scale powders, and from ordinary alloys to precious metals, resolving industrial bottlenecks via customized design.
1. Closed-Circuit Pressure Spray Granulation Dryer: Precise Controller of Particle Size & Morphology
Custom-built for ultra-coarse cemented carbide mixtures, this equipment adopts a fully sealed nitrogen circulation system and precise process control to resolve prevalent industry pain points such as oxidation, contamination and excessive oxygen content during granulation and drying.
① Equipped with pressure atomization and gas-liquid mixed flow technology, optimized nozzle structure and adjustable atomization pressure, it achieves accurate particle size distribution and ideal spherical granules with enhanced flowability and uniform compact density.
② In terms of process control, it establishes a triple closed-loop control model covering solid-liquid ratio, temperature and pressure. An online viscosity monitor adjusts slurry solid content in real time; the tower inlet temperature (180～200℃) and outlet temperature (70～90℃) are intelligently regulated, and spray pressure automatically adapts to slurry viscosity fluctuations to ensure uniform atomization.
③ Integrated with an intelligent electrical control system and an integrated cooling-sieving anti-caking conveying device, it realizes digital management and safety assurance for the whole production process. The produced powders feature excellent pressing performance and crack resistance, fully complying with stringent standards for high-quality cemented carbide manufacturing.
2. Closed-Circuit Centrifugal Spray Dryer: High-Efficiency Equipment for High-Performance Spherical Alloy Powders
Focused on core demands for spherical alloy powders, its closed-circuit design isolates external air to effectively control oxygen content and guarantee product purity.
① Adopting high-efficiency centrifugal atomization technology, it atomizes slurry into tiny droplets that fully exchange heat with hot air to complete rapid drying.
② Its unique airflow distribution design ensures uniform force on particles during drying, generating smooth, highly spherical powders with stable apparent density and superior flowability, ideal for fields with stringent powder morphology requirements such as 3D printing additive manufacturing.
③ Flexible parameter adjustment enables precise control of key indicators including atomization speed, hot air temperature and feeding rate according to characteristics of different alloy powders, delivering raw materials with high adaptability for downstream processing.
3. Nano Sand Milling & Airflow Spray Drying Production Line: Customized Precision Solution for Multi-Component Oxide Powders
To meet process requirements of multi-component oxide alloy powders for uniform composition, adjustable content and accurate particle size, Longxin Drying integrates nano sand milling and airflow spray drying technologies to build an integrated production line.
① The front-end nano sand mill optimizes grinding media and processes to achieve ultra-fine dispersion and uniform mixing of all components. The back-end airflow spray dryer adopts high-efficiency airflow atomization to rapidly dry dispersed slurry and prevent particle agglomeration.
② This production line precisely controls powder particle size within the micron range with minimal composition uniformity error. Key components such as cobalt can be freely adjusted below 30%, and no ammonia nitrogen wastewater is generated, complying with green production standards.
③ Synergistic treatment with raw materials achieves molecular-level composite of tungsten-cobalt and other elements for stable powder performance, widely applicable to the production of various cemented carbides.
4. Sealed Explosion-Proof Flash Dryer: Stability Guarantor for Ultra-Fine Alloy Production
Designed exclusively for ultra-fine alloy powders, it features a sealed structure and explosion-proof design, suitable for drying flammable, explosive and easily oxidized ultra-fine powder materials.
① High-temperature high-speed airflow fully contacts materials to realize rapid drying, drastically shortening drying time and avoiding performance degradation caused by prolonged heat exposure.
② Precise control of temperature and airflow velocity ensures ultra-fine powders remain free of agglomeration and oxidation during drying with uniform particle size distribution, stabilizing product quality and consistency.
③ Its unique crushing unit effectively breaks slightly agglomerated particles to further improve powder flowability, providing reliable support for large-scale production of ultra-fine alloy materials.
5. Single-Cone Ribbon Vacuum Dryer: Specialist for Low-Temperature Drying Balancing Efficiency & Material Protection
For heat-sensitive alloy powders and products requiring resin coating, Longxin single-cone ribbon vacuum dryers adopt vacuum low-temperature drying technology to maximize material property protection while securing drying efficiency.
① Its drying efficiency is several times higher than double-cone rotary vacuum dryers of the same specification, with a large effective heat transfer area. Materials move in a spiral lifting and eddy descending dispersed pattern inside the vessel for full and even heating.
② Accurate drying temperature control preserves the organic passivation film on cemented carbide powder, retaining passivation effects and enabling long-term storage of finished products.
③ Fully sealed nitrogen-filled production prevents cross-contamination. The narrow gap between agitator and vessel wall avoids material adhesion. Dried powders are loose and ready for sieving without crushing, perfectly retaining the unique dendritic structure and outstanding pressing performance.
6. Integrated Filter-Wash-Dry All-in-One Unit: Quality-Upgrading Equipment for Post-Processing of Precious Metals
Developed for post-processing of precious metal powders, it integrates filtration, washing and drying functions to complete continuous full-process operations within a single vessel, eliminating material loss and contamination during transfer.
① Featuring a cylinder-cone structure and conical filter device, it uses high-pressure nitrogen to generate positive pressure for solid-liquid separation, delivering superior washing effect and thorough uniform drying.
② For precious metal powders such as coarse silver powder, this unit reduces moisture content, eliminates ammonia gas emission throughout silver precipitation procedures, improves production environments and lowers labor intensity.
③ Optimized structural design addresses pain points of traditional filter presses including poor tightness, high moisture content and prominent environmental issues, offering an efficient solution for high-quality post-processing of precious metal powders.
Multi-Scenario Adaptation: Longxin Spray Dryers Unlock Cutting-Edge Processes for Powder Alloy Preparation
Aerospace: Ultra-coarse cemented carbide mixtures produced by closed-circuit pressure spray granulation dryers supply high-toughness, wear-resistant raw materials for engine turbine blades and aerospace structural parts.
3D Printing Additive Manufacturing: High-sphericity, high-flowability alloy powders manufactured by closed-circuit centrifugal spray dryers guarantee forming precision and mechanical properties of complex components.
Thermal Spray Alloys: Multi-component oxide powders from the nano sand milling & airflow spray drying production line greatly enhance coating wear resistance and bonding strength thanks to uniform composition and precise particle size distribution.
New Energy Vehicle Manufacturing: Lightweight alloy powders processed by single-cone ribbon vacuum dryers support lightweight and high-strength upgrading of automotive parts.
Precious Metal Processing: Integrated filter-wash-dry all-in-one units efficiently resolve post-processing challenges for materials like coarse silver powder, balancing environmental protection and product quality.
Electrode Alloys: Sealed explosion-proof flash dryers secure the stability and consistency of ultra-fine electrode powders, boosting electrode conductivity and service life.
Endless Innovation: Forging a New Future for Powder Metallurgy Materials
As an innovator in powder metallurgy drying technology, Longxin Drying consistently takes technological innovation as its core driving force, creates value for customers through full-chain service capabilities, and facilitates the industry’s transformation toward green, efficient and high-quality development.
Full-process professional capabilities: Longxin delivers full-chain services covering process development, equipment configuration and supply, with professional expertise spanning all links from material grinding and purification to drying and coating. Whether optimization of upstream raw material pretreatment or performance adaptation of downstream finished products, the Longxin team provides professional technical support and customizes optimal solutions for clients.
Technology transformation capacity: Longxin combines process, application and engineering expertise with physical testing on pilot-scale equipment to rapidly interpret client demands. Through design, simulation and test verification, it converts client concepts into practical production schemes. The pilot platform accurately simulates industrial production scenarios to provide reliable data support for equipment parameter optimization and process improvement, stabilizing and boosting efficiency in mass production.
Green and sustainable development: Longxin focuses on developing energy-saving and consumption-reducing components and equipment. Technological innovations including fully sealed circulation systems, waste heat recovery and low-energy drive effectively cut consumption of energy, water and resources. The equipment operates with zero harmful gas emissions and minimal wastewater discharge, complying with national environmental standards, enabling green production for clients and supporting sustainable industrial development.
Outlook
As powder metallurgy materials continue to advance toward ultra-coarsening, low oxidation and intelligence, Longxin Drying will deepen technological R&D, center on customer demands, continuously refine its product portfolio and upgrade customized service capacity. With state-of-the-art precision drying technology, more efficient solutions and superior service experience, we will forge ahead alongside industry clients to break through technical bottlenecks and build a new landscape for powder metallurgy materials, laying solid support for the growth of high-end manufacturing.
Longxin Drying creates innovative value via precision drying and empowers industrial upgrading with customized solutions. We sincerely invite global partners in the powder alloy industry to seek common development and embrace a promising future together!Read More
Longxin Intelligent Shapes a New Future for Powder Alloy Materials with Customized SolutionsIn cutting-edge sectors including aerospace, new energy vehicles, high-performance mold manufacturing and biomedical engineering, additive manufacturing (3D printing) and thermal spraying technologies are reshaping the landscape of industrial manufacturing at an unprecedented pace. As the "raw material" powering these advanced manufacturing techniques, the quality of high-performance powder alloys directly determines the performance ceiling of final finished products. Driven by increasingly stringent market requirements for lightweight complex components, integrated multi-functional design and enhanced environmental adaptability, the powder alloy industry is undergoing a pivotal transformation from volume-oriented production to quality-driven development.
Nevertheless, amid this wave of industrial upgrading, drying and granulation processes often emerge as bottlenecks restricting breakthroughs in powder performance. Conventional drying methods struggle to simultaneously address key challenges for ultra-fine powders: agglomeration prevention, sphericity control, oxygen content suppression, and safe handling of flammable and explosive materials. To meet the stringent process requirements of diverse materials such as high-temperature alloys, spherical alloy powders and electrode alloys, Longxin Drying leverages profound technical expertise and innovative ingenuity to launch a full range of customized precision drying solutions, unlocking transformative possibilities for the powder metallurgy sector.
Addressing Industry Pain Points: Challenges and Innovations in Traditional Drying Processes
The preparation of powder alloys currently faces multiple technical hurdles:
Difficult control over particle size distribution and morphology: Spherical powders for 3D printing demand exceptional flowability and apparent density, yet conventional airflow drying tends to produce irregular particles.
Poor composition uniformity: Multicomponent oxides or composite alloys are prone to segregation during drying, undermining the mechanical properties of end materials.
Prominent safety hazards: Ultra-fine metal powders feature an extremely large specific surface area, making them highly susceptible to oxidation and even explosion; standard open drying systems fail to deliver an inert gas protective atmosphere.
Cumbersome post-processing workflows: Separate washing, filtration and drying procedures for precious metal production lead to low efficiency, material loss and secondary contamination.
To resolve these pain points, Longxin Intelligent conducts in-depth analysis of the physical and chemical properties of powder alloys. Rejecting one-size-fits-all generic equipment models, we deliver highly customized solutions tailored to unique material characteristics to guarantee all powders meet stringent process specifications.
Core Product Portfolio: Six Customized Solutions for Diverse Material Properties
Backed by an independently developed core technology matrix, Longxin Drying has built a comprehensive precision drying equipment ecosystem, delivering tailor-made solutions for powder alloys with distinct properties:
Closed-Circuit Pressure Spray Granulation Dryer: Optimizing Particle Size and Morphology for Cemented Carbides
Designed for cemented carbide mixes with strict standards for particle size distribution and particle strength, this equipment adopts a closed-circuit system using organic solvents or inert gas as the medium to effectively inhibit oxidation. By precisely regulating atomization pressure and inlet air temperature, it produces spherical particles with uniform particle sizes, dense internal structures and superior flowability, improving the quality and efficiency of subsequent compression molding.
Closed-Circuit Centrifugal Spray Dryer: Producing High-Sphericity Alloy Powders
Engineered exclusively for high-temperature alloys and 3D printing feedstock. A high-speed centrifugal disk atomizes molten or slurry-form alloys into micron-sized droplets, which instantaneously dry and solidify under an inert closed atmosphere. This process delivers powders with superior sphericity and low porosity, while accurately stabilizing oxygen content, perfectly matching high-end additive manufacturing processes such as selective laser melting.
Nano Sand Milling-Airflow Spray Drying Production Line: Setting New Standards for Multicomponent Oxides
Developed for new energy battery materials, special ceramic precursors and other multicomponent oxide powders, this integrated production line combines nano sand milling dispersion technology with airflow spray drying capabilities. It achieves uniform micron-level mixing of components, with flexible adjustment of composition ratios and particle sizes, eliminating severe agglomeration and broad particle size distribution plaguing traditional processes, and laying a solid foundation for the design of high-performance alloy formulations.
Closed Explosion-Proof Flash Dryer: Ensuring Safe Production of Ultra-Fine Alloys
To address the flammability and explosiveness of ultra-fine alloy powders, Longxin has developed a fully closed explosion-proof flash drying system. It integrates rapid dehydration with precise temperature control; materials complete moisture removal in an instant, avoiding performance degradation from prolonged heat exposure. Outstanding operational stability and consistency enable safe, large-scale continuous production.
Single-Cone Ribbon Vacuum Dryer: Balancing Low-Temperature Drying and Resin Coating
The ideal solution for heat-sensitive alloy powders or materials requiring surface modification such as resin coating. It performs efficient low-temperature drying under vacuum conditions, preserving the alloy’s microstructure while enabling uniform adhesion of coating layers. Energy-saving design and gentle agitation minimize material abrasion and boost product added value.
Integrated Filter-Wash-Dry All-in-One Unit: Boosting Quality for Precious Metal Post-Processing
Combining filtration, washing and drying functions within a single unit, revolutionizing traditional precious metal post-processing workflows. All procedures are completed inside one sealed vessel, drastically shortening production cycles while eliminating material loss and contamination during transfer. It elevates precious metal recovery rates and product purity.
Full-Spectrum Industry Empowerment: Unlocking Cutting-Edge Powder Alloy Manufacturing Processes
Longxin’s precision drying technologies serve a wide array of subsectors including high-temperature alloys, powder metallurgy, thermal spray alloys and electrode alloys:
Aerospace: Longxin equipment facilitates the production of high-strength, high-toughness titanium and nickel-based superalloy powders, advancing lightweight upgrades for critical components such as engine blades.
New Energy: Highly consistent spherical alloy powders provide core support for manufacturing high-efficiency electrodes.
Biomedical 3D Printing Implants: High-purity, low-oxygen powder materials enable personalized custom implant fabrication.
Beyond supplying standalone equipment, Longxin partners with clients to master advanced manufacturing processes and seize competitive market advantages.
Continuous Innovation: Comprehensive Professional Support Across the Entire Workflow
Longxin Drying recognizes that premium equipment is only half the solution; all-round professional services are the cornerstone of future manufacturing success.
End-to-End Technical Expertise: We deliver one-stop solutions covering upstream raw material purification, midstream drying and granulation, and downstream surface coating. Our team of industry specialists possesses full-lifecycle powder metallurgy expertise, designing optimal process configurations customized to each client’s unique material properties.
Transforming Concept into Reality: Our advanced pilot testing base converts clients’ process concepts into tangible test data. Closed-loop validation via simulation, engineering design and physical testing ensures every production line achieves optimal operational performance upon launch, cutting clients’ trial-and-error costs.
Driving Sustainable Manufacturing: Aligned with the national dual-carbon goals, Longxin develops low-carbon, energy-efficient equipment components. Our closed-circuit systems drastically reduce solvent consumption and exhaust emissions, while high-efficiency heat recovery modules curb energy waste, supporting the powder alloy industry’s transition to green manufacturing.
Outlook for the Future
Adhering to the core philosophy of "Precision Drying, Intelligent Manufacturing for Tomorrow", Longxin Drying will continue to drive technological innovation and center its development on customer demands, deepening its footprint in the powder alloy sector. We look forward to collaborating with global industry partners to propel leapfrog advancements in high-temperature alloys, 3D printing materials and specialty powder metallurgy technologies, co-creating a more efficient, safe and sustainable new era for advanced materials.Read More
Pursuing Ultrafine & High-Purity Materials: Integrated Nano Milling & Spray Drying Line for Spherical Alumina Diaphragm Thermal Conductive Materials Boosts Lithium Battery SafetyAgainst the backdrop of explosive growth in the new energy vehicle market, battery safety has become the core lifeline of industrial development, and high-performance thermal conductive materials have entered a period of rapid expansion accordingly. Demand for spherical alumina, the leading thermal conductive filler, has surged dramatically.
Spherical alumina used as diaphragm thermal conductive materials must meet stringent standards for ultrafine particle size (precise size control) and high purity (ultra-low impurity content), which calls for collaborative technological breakthroughs in grinding and drying processes. Longxin Intelligent has developed an integrated production line combining high-flow pin-type nano bead mills and high-temperature spray drying towers as a one-stop solution tailored to such requirements. This system comprehensively overcomes bottlenecks of conventional manufacturing processes in grinding throughput, particle size precision, purity assurance and dried powder quality.
Full English Translation of the Complete Article
Pursuing Ultrafine & High-Purity Materials | Integrated Nano Grinding & Spray Drying Production Line for Spherical Alumina Diaphragm Thermal Conductive Materials Empowers Lithium Battery Safety
With the explosive expansion of the new energy vehicle market, its supporting industries have embarked on rapid development. Thermal management, the critical sector directly related to personal safety, generates massive demand for high-performance thermal conductive materials, among which spherical alumina stands as the primary filler with rapidly rising market demand.
Fine alumina serves as a core coating material for lithium-ion battery separators. The main raw materials of separators, polyethylene and polypropylene, feature relatively low melting points and poor thermal stability. Under elevated temperatures, separators tend to shrink significantly or even rupture, triggering battery short circuits. Single-sided or double-sided coating of separators improves their high-temperature stability, mitigating safety hazards such as cathode-anode contact, combustion and explosion caused by thermal shrinkage. Coated separators gain increased thickness, delivering enhanced structural stability and extended service life. When fine alumina is coated onto separators of power batteries for new energy vehicles and consumer lithium batteries, it effectively optimizes the separators’ thermal shrinkage resistance and guarantees battery safety.
Market Demand Analysis: Soaring Demand for Spherical Alumina
Market statistics reveal a remarkable upward trend in spherical alumina consumption. Data from Gaogong Industry Research Institute shows the global thermal conductive powder market reached 5.04 billion RMB in 2022. Spherical alumina thermal powder accounted for 50.8% of the market share, valued at 2.56 billion RMB, representing a year-on-year increase of 30.7%. As the world’s core consumer market, China’s spherical alumina thermal powder market hit 750 million RMB in 2022, growing 41.5% year-on-year. Its global market share has climbed year after year, reaching 29.3% in 2022. Forecasts project China’s market size will surge to 2.1 billion RMB by 2025, with its global proportion rising further to 38.9%.
Behind these figures lies rigid demand for premium spherical alumina from power batteries, electronic control units, drive motors and charging piles for new energy vehicles. The popularization of fast-charging technology creates severe heat dissipation pressure on batteries and electronic components, imposing stricter standards on spherical alumina’s ultrafine particle size and high purity, and pushing the whole industry toward upgraded technical specifications.
Manufacturing Process of High-Purity Alumina Ceramics: Transformation Path from Raw Ore to Precision Finished Products
High-purity alumina ceramics form the foundation of refined alumina products such as spherical alumina. Rigorous production procedures directly determine the performance of downstream materials. The complete workflow consists of four core stages: raw powder preparation, green body forming, high-temperature sintering and precision machining, all requiring precise control over powder purity and fineness.
Raw Powder Preparation: Achieve Ultrafine Granularity & Ultrahigh Purity
The primary objective of this stage is to refine raw materials into ultrafine, high-purity powder. Production starts with bauxite purification. Industrial alumina (Al₂O₃) manufactured via the Bayer process is mixed with sintering additives (e.g. MgO) and fed into ball mills for wet grinding using deionized water or ethanol as the grinding medium. This process breaks particle agglomerates and pulverizes materials down to micron or submicron sizes, drastically boosting powder specific surface area and chemical reactivity for subsequent procedures.
Ground slurry undergoes repeated washing and sedimentation solid-liquid separation to remove soluble impurities and grinding-derived contaminants, securing high raw material purity. Calcination follows at 1200–1400°C to eliminate chemically bound water and complete crystal phase transformation, forming stable α-Al₂O₃. To resolve poor flowability of calcined powder, spray granulation and drying are implemented: powder is mixed with binders and plasticizers to form homogeneous slurry, which is pumped into a spray drying tower and atomized into tiny droplets. Instant contact with hot air produces hollow spherical powder with outstanding flowability, enabling automated forming operations. Bag dust collectors installed throughout drying and conveying processes recover raw materials to cut production costs, maintain a safe workshop environment and comply with environmental regulations.
Green Body Forming: Customized Processes for Diverse Product Specifications
Forming techniques are selected based on finished product requirements:
Uniaxial pressing: Cost-effective for simple flat and cylindrical components;
Isostatic pressing: Transmits uniform omnidirectional pressure via elastic molds to fabricate high-density, homogeneous green bodies for high-performance applications;
Slip casting: Ideal for large thin-walled complex parts;
Extrusion: Continuous manufacturing of tubular and rod-shaped products;
Injection molding: Suits intricate 3D components such as internally threaded parts and micro turbine rotors, delivering high efficiency and consistent dimensional accuracy, with post-sintering debinding required to remove residual binders.
High-Temperature Sintering: The Critical Stage for Ceramic Densification
After forming, green bodies are heated in high-temperature kilns up to 1800°C following precise temperature curves. Material transport mechanisms including diffusion and evaporation-condensation form interparticle necks, promoting grain growth and pore elimination. The final dense, high-strength microstructure endows alumina ceramics with superior mechanical properties and structural stability.
Precision Machining: Diamond Tool Finishing
Sintered alumina ceramics feature extreme hardness and minor shrinkage deformation. Diamond grinding wheels and heads with electroplated or sintered abrasive grains are used to machine flat surfaces, outer circles, inner bores and complex profiles, achieving micron-level dimensional accuracy, geometric tolerances and surface finish to satisfy premium-grade application demands.
Dual-Core Equipment: High-Flow Pin-Type Nano Bead Mill & High-Temperature Spray Drying Tower Empower Ultrafine, High-Purity Spherical Alumina
Stringent requirements for ultrafine particle size and ultra-low impurity content of separator-grade spherical alumina demand collaborative innovation across grinding and drying processes. Longxin Intelligent’s integrated production line pairing high-flow pin-type nano bead mills and high-temperature spray drying towers serves as a tailor-made all-in-one solution, fully resolving traditional process limitations in grinding capacity, particle size control, purity protection and dried powder quality.
Advantages of the High-Flow Pin-Type Nano Bead Mill
The grinding unit addresses traditional equipment’s drawbacks of low throughput, wide particle size distribution and impurity contamination risks:
A composite turbine-pin rotor structure drives materials along a 3D motion path combining circumferential vortex flow and radial impact. Paired with 0.3–0.5 mm zirconia grinding beads, triple forces of shear, collision and extrusion gradually refine particles. Spherical alumina D50 can be stably controlled between 100 nm and 2 μm, with narrower particle size distribution than the industry average, perfectly matching ultrafine powder requirements for separator coating.
A screenless centrifugal separation design eliminates metal screen contact with materials, restricting metallic impurities to an extremely low level and guaranteeing high alumina purity. It also prevents screen clogging caused by high-viscosity slurry or fibrous contaminants, extending continuous operation lifespan several times over conventional equipment and drastically lifting production efficiency.
Advantages of the High-Temperature Spray Drying Tower
The drying tower processes ultrafine slurry post-grinding, preserving particle characteristics while enhancing powder flowability:
Optimized hot air distribution and ultra-high-speed atomization atomize slurry into uniform micro-droplets that instantly dry upon contact with hot air, generating hollow spherical powder. The process retains ultrafine particle sizes achieved in grinding and resolves common issues of ultrafine powder agglomeration and poor flowability, supporting automatic feeding and uniform coating in subsequent separator manufacturing.
A new offline pulse bag dust collector with high-temperature-resistant filter bags and cold air protection system recovers over 99% of ultrafine spherical alumina powder without introducing secondary contamination during drying, further strengthening the product’s purity edge.
Longxin High-Flow Pin-Type Nano Bead Mill: Technical Details Deliver Superior Grinding Performance
As the core grinding equipment, the mill integrates proprietary innovations in structural design, wear-resistant materials and intelligent control to enable reliable ultrafine processing of spherical alumina.
A modular grinding assembly paired with an advanced screen-free separation system breaks the conventional integrated grinding-separation design constraints.
Turbine pin components are manufactured from tungsten carbide (HRC 90 hardness) with specialized surface coatings. Uniform energy density distribution is maintained at rotational speeds of 1200–1800 r/min to avoid localized over-grinding and particle agglomeration, ensuring consistent spherical alumina particle sizes.
The grinding chamber is constructed from silicon carbide (HV 1800+ hardness) with exceptional wear resistance and thermal conductivity. Its service life exceeds stainless steel by 5 times, while thermal conductivity triples that of stainless steel. Combined with jacket cooling, stable operating temperatures are maintained to prevent crystal phase transformation or oxidation of spherical alumina during grinding, securing consistent product performance.
The intelligent control system acts as the equipment’s operational brain. Equipped with PLC modules and real-time temperature, pressure and flow sensors, it continuously collects key process parameters and automatically adjusts rotor speed and feed flow via built-in algorithms. If particle size deviates from set targets, rotational speed is optimized autonomously to stabilize particle dimensions. The mill supports MES system connection, forming a full closed-loop workflow of online monitoring, real-time adjustment and data traceability to meet flexible multi-variety, small-batch production demands. Pre-stored process recipes for different alumina batches drastically shorten product changeover time.
Outstanding economic performance in energy consumption and maintenance: The silicon carbide grinding chamber’s superior heat transfer eliminates extra heat exchangers, cutting unit energy consumption by over 20% vs. traditional mills. High-efficiency small-diameter zirconia beads reduce grinding media consumption by 15% at equivalent throughput. Long-lasting wear-resistant components lower annual maintenance costs by 30%, delivering substantial economic benefits to manufacturers.
High-Temperature Spray Drying Tower: Refined Design Ensures Superior Dried Powder Quality
Customized for spherical alumina slurry drying, the tower features comprehensive technical upgrades covering hot air distribution, atomization, cooling and dust recovery to retain ultrafine particle size, high purity and excellent flowability of finished alumina powder.
CFD fluid dynamics simulation optimizes the hot air distribution system. Simulated internal hot air flow patterns refine air duct geometry and inlet angles to form a uniform, stable swirling airflow field inside the tower. Full contact between atomized droplets and hot air avoids localized overheating that causes particle sintering or degradation, while delivering consistent moisture content across all powder to satisfy strict drying standards for separator coating materials.
Fully self-developed ultra-high-speed centrifugal atomizers deliver reliable performance with rotational speeds ranging from 15,000 to 25,000 r/min. Slurry is atomized into 5–50 μm uniform droplets to ensure consistent powder particle size after drying and eliminate coarse particle impurities. Precision dynamic balancing minimizes operational vibration and failure rates, outperforming competing industrial equipment in continuous run stability.
Interchangeable atomizer disks support diverse process requirements: Flat disks suit low-viscosity slurry to produce fine powder; turbine disks boost atomization efficiency for medium-to-high viscosity feedstock. Multiple disk options expand process adaptability for various grades and batches of spherical alumina.
Combined oil-air dual cooling systems stabilize high-temperature operation: The oil cooling loop rapidly dissipates heat from the atomizer spindle, while auxiliary air cooling maintains atomizer operating temperature below 80°C. The control system monitors atomizer speed, temperature, vibration as well as tower internal temperature and pressure in real time, triggering automatic alarms and parameter adjustments upon abnormalities to prevent equipment thermal damage and sustain uninterrupted production.
Advanced offline pulse bag dust collectors improve recovery efficiency and powder purity: CFD-optimized flow field structures eliminate airflow dead zones, paired with PTFE filter bags resistant to temperatures up to 300°C to capture over 99% of ultrafine alumina powder. Cold air shielding protects filter bags from direct contact with high-temperature hot air to extend service life. Offline ash cleaning enables filter maintenance without production shutdowns, sustaining continuous manufacturing and eliminating cross-contamination during cleaning to preserve alumina purity.
Integrated Multi-Dimensional Energy-Saving Technologies: Longxin Intelligent Develops High-Efficiency, Low-Consumption Spray Drying Systems
Energy optimization for high-temperature spray drying towers relies on deep integration of thermodynamics, fluid mechanics, automation and material processing rather than simple superposition of isolated technologies. Centered on the integrated grinding-drying production line, Longxin Intelligent embeds energy-saving design throughout equipment development, process matching and intelligent operation, achieving a balance of high production performance and low energy use and setting new benchmarks for green manufacturing of high-quality alumina powder.
Hot Air Energy Management to Boost Thermal Efficiency
Optimized inlet-outlet temperature differential: Maximize inlet air temperature within powder moisture specifications to reduce required hot air volume.
Waste heat recovery system: High-temperature exhaust retains 10–20% of process heat, recovered via standard air-air heat exchangers or exhaust recirculation preheating modules. Recovered heat preheats fresh intake air to reduce main heater load and preheats feed slurry to 40–60°C to lower viscosity and improve atomization results.
Precision Process Parameter Control Reduces Energy Use at the Source
Elevated feed solid content: Raising slurry solid loading from 30% to 45–50% cuts evaporation volume by nearly 30%, directly lowering energy consumption by more than 20%. High-solid, low-viscosity slurry output from Longxin nano bead mills enables high-concentration feeding.
Intelligent atomization matching: Variable-frequency centrifugal atomizers dynamically adjust rotational speed based on slurry properties for uniform droplet sizes, preventing secondary drying from oversized droplets or fine powder loss. Consistent atomization shortens drying duration and eliminates wasted thermal energy.
Stable Continuous Feeding
High-precision screw pumps paired with PID flow closed-loop control eliminate temperature fluctuations caused by unstable feed rates, maintaining a steady thermal field inside the tower and avoiding repeated reheating cycles.
4. Optimized Equipment Structure & System Design
High-efficiency dust recovery with offline pulse cleaning achieves >99% powder yield; reduced material loss translates to lower energy consumption per unit product. Automated regular ash cleaning stabilizes system pressure drop and cuts induced draft fan power draw.
5. Intelligent Control System Delivers Dynamic Energy Savings
3D thermal field monitoring: Multi-point temperature sensors installed at air inlet, drying zone and outlet generate real-time thermal distribution models.
Adaptive algorithm parameter tuning: Automatically adjusts inlet air temperature, atomizer speed and exhaust air volume based on feed concentration and ambient temperature/humidity to maintain operation at the minimum effective energy point.
Recipe storage & one-click switching: Pre-sets optimal drying curves for spherical alumina, boehmite, activated alumina and other materials to eliminate energy waste from trial-and-error process adjustments.
Intelligent Production Lines Drive Industrial Upgrading: Ultrafine High-Purity Spherical Alumina Safeguards Lithium Battery Performance
Longxin Intelligent’s integrated spherical alumina grinding and drying line combining high-flow pin-type nano bead mills and high-temperature spray drying towers is far more than a simple combination of machinery. Through process coordination and intelligent full-process control, it delivers consistent ultrafine, high-purity alumina powder that serves as core separator thermal conductive material, fundamentally improving lithium battery safety at the raw material level.
Product Performance Advantages
Spherical alumina manufactured by this line features stable D50 particle sizes and narrow particle size distribution, dispersing evenly in separator coating slurry to form dense, high-thermal-conductivity coating layers. The coating prevents short circuits induced by separator rupture, while the high thermal conductivity of spherical alumina accelerates heat dissipation during battery operation, mitigating localized overheating and lowering risks of combustion and explosion.
2. Production Efficiency & Cost Advantages
The line enables fully continuous spherical alumina manufacturing. The high-flow pin-type nano bead mill delivers hundreds of liters hourly, lifting throughput 2–3 times compared to traditional equipment. Matching drying capacity of the high-temperature spray tower creates seamless grinding-drying workflow integration, boosting daily output of a single line by over 30% vs. batch manufacturing systems. Low energy consumption and minimal maintenance reduce unit production costs of spherical alumina by 15–20%, supporting manufacturers to strengthen market competitiveness without compromising product quality.
Technological Innovation Establishes New Standards for Alumina Ceramic Powder Manufacturing
Looking ahead, new energy vehicles will advance toward longer driving ranges and faster charging, raising performance thresholds for separator thermal conductive materials. Longxin Intelligent will continue deepening R&D into nano grinding and drying technologies: developing more wear-resistant grinding chamber materials, refining intelligent control algorithm precision and expanding multi-device linked unmanned production lines. We will continuously push the limits of spherical alumina particle size and purity control, delivering stronger raw material manufacturing solutions to elevate lithium battery safety performance and fuel high-quality development of the new energy industry.
As a professional equipment manufacturer and technical service provider for refined alumina products including spherical alumina, alumina ceramic powder, ultrafine aluminum hydroxide, boehmite, activated alumina, nano alumina, high-purity alumina and granulated alumina powder, Longxin Intelligent centers its development strategy on technology-driven product upgrading. Our integrated intelligent grinding-drying production lines supply high-consistency refined alumina manufacturing equipment and customized solutions to global clients. We look forward to collaborating with industrial partners to advance refined alumina technology and power innovation across new energy, electronics, medical and other high-tech sectors.
Pursuing Ultrafine & High-Purity Materials: Integrated Nano Milling & Spray Drying Line for Spherical Alumina Diaphragm Thermal Conductive Materials Boosts Lithium Battery Safety
Against the backdrop of explosive growth in the new energy vehicle market, battery safety has become the core lifeline of industrial development, and high-performance thermal conductive materials have entered a period of rapid expansion accordingly. Demand for spherical alumina, the leading thermal conductive filler, has surged dramatically.
Spherical alumina used as diaphragm thermal conductive materials must meet stringent standards for ultrafine particle size (precise size control) and high purity (ultra-low impurity content), which calls for collaborative technological breakthroughs in grinding and drying processes. Longxin Intelligent has developed an integrated production line combining high-flow pin-type nano bead mills and high-temperature spray drying towers as a one-stop solution tailored to such requirements. This system comprehensively overcomes bottlenecks of conventional manufacturing processes in grinding throughput, particle size precision, purity assurance and dried powder quality.Read More
Innovative Craftsmanship Creates a Promising Future | Automated Production Line of High-Flow Disc Bead Mill and Spray Granulation Dryer Enables Mass Industrial Production of DF Dry FlowablesDriven by accelerated global agricultural modernization and increasingly stringent environmental regulations, pesticide formulations are undergoing a profound shift from traditional highly polluting, low-efficiency varieties to eco-friendly, efficient and precision-oriented products. As a premium type of water-dispersible granule, Dry Flowable (DF) features zero dust, solvent-free composition, high suspension rate and long-lasting efficacy. It has become an ideal alternative to conventional wettable powders and emulsifiable concentrates, accompanied by explosive growth in market demand.
From the market perspective, food security pressure brought by population growth fuels continuous expansion of the pesticide industry. Capable of cutting pesticide dosage and improving efficacy utilization, DF conforms to the national strategy of pesticide reduction in agriculture and is widely favored by growers. In terms of environmental policies, traditional pesticide formulations face strict restrictions due to dust pollution and volatile organic solvent emissions. In contrast, the eco-friendly properties of DF comply with regulatory standards, leading to steady expansion of its market share. Meanwhile, modern agriculture puts forward higher requirements for convenient and precise pesticide application. DF is easy to measure and compatible with various spraying methods, further expanding its application range. Widely applicable to field crops and cash crops alike, DF has evolved into one of the mainstream pesticide formulations. In the future, with continuous upgrading of core technologies including spray drying and ultrafine grinding, DF will develop toward higher purity, better stability and lower production costs. Industrial competition will center on technological innovation and mass production capacity.
Production Process Analysis of DF Dry Flowables
The manufacturing process of DF consists of four core procedures: raw material pretreatment, wet bead milling, spray granulation & drying, and post-treatment. Precise technical control of each procedure directly determines final product quality.
Raw Material Pretreatment
Strictly control the particle size and mixing ratio of pesticide technical materials and auxiliary agents. Pre-crush raw materials to meet particle size requirements, then conduct precise batching to optimize the physicochemical properties of the system, laying a solid foundation for subsequent suspension preparation.
Wet Bead Milling
This is the critical procedure to prepare fine-particle suspension. High-efficiency grinding equipment refines material particles to guarantee superior dispersibility and suspension performance of finished products.
Spray Granulation & Drying
The suspension after milling is atomized into tiny droplets via atomizers, which exchange heat and mass with hot air to form hollow spherical solid particles. This procedure requires precise control over atomization parameters, drying temperature and airflow distribution to ensure uniform and stable particles.
Post-Treatment
Remove unqualified particles through mechanical screening and air classification. A full-process quality control system is implemented to guarantee the finished products meet specified particle size distribution standards.
Breakthroughs Brought by Our Innovative Craftsmanship
Longxin Drying independently developed a complete automated production line integrating grinding and spray drying equipment for DF. It deeply combines high-flow disc bead mills and dedicated spray granulation dryers to realize full-process automatic control from raw material feeding to finished product output.
Centered on three design concepts: high efficiency, high precision and environmental protection, the line leverages process optimization and intelligent control technology to tackle persistent drawbacks of traditional production, such as low efficiency, inconsistent product quality and high pollution risks.
Equipped with an advanced real-time monitoring platform, it supports full-process digital collection and adjustment of key parameters including grinding temperature, material flow, atomization pressure, drying temperature & humidity and particle size, ensuring stable and traceable production.
The one-touch cleaning system paired with a dead-space-free design eliminates cross-contamination at the source, greatly boosting flexibility for multi-product manufacturing and delivering reliable support for large-scale industrial production.
High-Flow Disc Micron Bead Mill: High-Efficiency Milling for Superior Slurry Quality
As the core grinding equipment of the whole line, the WSP-E high-flow disc micron bead mill developed by Longxin Intelligent serves as the key facility for DF wet milling with multiple proprietary technical innovations.
It adopts a composite grinding structure of disc plates and pin rods. Disc plates break up materials and generate strong high-speed shear force, while pin rods reinforce grinding effects. Compared with traditional single-disc structures, it achieves higher grinding efficiency, eliminates most grinding dead zones and reduces material residue.
Multiple customized material options are available: ceramic, polyurethane (PU) and hardened German steel. Ceramic and PU components deliver zero metallic contamination, meeting DF’s strict purity standards and preventing impurities from damaging pesticide active ingredients.
Designed for high throughput with an increased filling rate of the grinding chamber far exceeding conventional models. Its maximum hourly processing capacity reaches 1,000 liters, greatly outperforming traditional equipment to fully satisfy mass production demands.
The jacketed cooling system realizes heat exchange with process liquid to accurately stabilize grinding temperature and effectively prevent thermal decomposition of pesticide active ingredients.
Complete safety protection configuration: an automatic pressure protection device and comprehensive electrical protection system. The machine will automatically stop and release pressure once the pressure inside the grinding chamber exceeds the preset threshold (0.2–0.4 MPa as standard). The electrical system monitors operating status in real time to guarantee safe and stable production.
The front discharge valve shortens cleaning and product switching time, improves changeover efficiency and significantly cuts time costs for multi-variety production.
Spray Granulation Dryer: Precision Drying for One-Step Pellet Forming
Custom-built for DF manufacturing, this spray granulation dryer undergoes comprehensive technical optimization targeting industry pain points, with outstanding performance in energy conservation, efficiency and product quality control.
The straight cylindrical tower body ensures uniform distribution of wind speed and heat to avoid material adhesion on tower walls.
The improved conical hot air distributor works together with baffle rectifying plates to convert hot air into stable straight airflow, reducing heat loss caused by turbulent flow and raising thermal efficiency.
Rotary pressure nozzles are adopted to solve the defects of traditional nozzles such as narrow atomization angle, short service life and high energy consumption. Droplet size can be precisely adjusted according to product requirements to ensure uniform particles.
An enlarged section or cyclone structure at the tower bottom improves material output and pellet forming rate. Matched with innovative fine powder recovery technology and dust suppression devices, it reduces material loss and optimizes the operating environment.
In terms of process control, energy utilization efficiency is maximized by optimizing the temperature difference between air inlet and outlet as well as pre-dehydration treatment. On the premise of guaranteeing product quality, the air inlet temperature can be moderately raised while exhaust temperature is lowered to reduce heat waste. Raw materials are pre-dehydrated and preheated before entering the drying tower to cut evaporation load and further improve energy-saving performance. During drying, pellet particle size can be precisely regulated by adjusting atomization pressure and hot air velocity. Combined with anti-agglomerant addition, particle adhesion is effectively inhibited, enabling finished products to feature excellent disintegration and suspension performance. Pellets produced by this dryer boast high sphericity and good flowability. They disintegrate within seconds after contacting water and maintain a high suspension rate, fully meeting core application requirements for pesticides.
Lead Industrial Transformation, Embrace a Greener Future
Featuring technological innovation as its core competitiveness, the automated DF production line combining high-flow disc bead mills and spray granulation dryers from Longxin Drying closely follows the global trend of green and reduced-dose pesticide formulations, injecting powerful momentum into agricultural green transformation. The deep integration of high-efficiency grinding and precision drying technology achieves dual improvements in DF production efficiency and product quality. Its strengths including zero metallic contamination, low energy consumption and full automation not only help manufacturers cut production costs and strengthen market competitiveness, but also drive the pesticide industry toward high-quality and sustainable development.
In the future, Longxin Drying will continue to focus on grinding and drying technology research and development. Relying on the innovation capability of its technical team, we will continuously optimize production line performance and develop more intelligent equipment tailored to diverse industrial demands. Through in-depth integration of premium equipment and self-developed proprietary processes, Longxin Drying will provide superior and more efficient solutions for the agrochemical industry, supporting more manufacturers to complete production upgrading and industrial transformation. Empowering the development of green agriculture with our innovative craftsmanship, we will write a new chapter of innovative development for the whole industry.Read More
New Craftsmanship Powers a Brighter Future | Automated Production Line of High-Flow Disc Bead Mill & Spray Granulation Dryer Enables Industrial Manufacturing of DF Dry FlowablesDriven by the sustainable development of agrochemicals and the transition to green pesticides, high-efficiency, eco-friendly and safe pesticide formulations have become the mainstream trend of the industry. As an advanced solid formulation featuring water-based composition, dust-free operation and outstanding dispersibility, Dry Flowable (DF) agents stand out for their superior suspension rate, wettability and disintegration speed alongside eco-friendly attributes. In recent years, market demand for DF has kept rising steadily, with wide applications in insecticides, fungicides, herbicides and other products. Institutional forecasts project that the global DF formulation market will register an annual compound growth rate exceeding 8% over the next five years. In key agricultural markets including Europe, America, Southeast Asia and China, policy incentives and growing end-user demand for green plant protection products are accelerating the phase-out of traditional emulsifiable concentrates and wettable powders in favor of eco-friendly new formulations such as DF.
Against this backdrop, realizing high-quality, large-scale, intelligent and clean industrial production of DF has become a core challenge for pesticide chemical enterprises undergoing transformation and upgrading. Drawing on years of profound expertise in fine chemicals, Longxin Intelligent has innovatively launched an automated production line integrating high-flow disc bead mills and spray granulation dryers. Pioneering a new era of DF industrialization with its proprietary "Xin" craftsmanship, this integrated line empowers clients to boost productivity, upgrade product quality, cut costs and reduce carbon emissions, and propel China’s pesticide formulation industry toward high-end and green development.
Analysis of DF Production Technology: A Systematic Process from Milling to Drying
The preparation of DF generally consists of five core procedures: technical material pretreatment, wet grinding, stabilizing dispersion, spray granulation and drying, as well as sieving and packaging. Among these, ultrafine wet grinding and spray granulation drying are the critical processes determining DF product quality and production capacity.
Conventional DF manufacturing mostly adopts batch ball mills or basket bead mills paired with fluidized bed dryers, plagued by low grinding efficiency, inconsistent batch quality, high energy consumption and severe dust pollution. Such outdated setups fail to meet the strict requirements of modern pesticide manufacturers for continuous, automated and clean production. Targeting these pain points, the integrated grinding and drying automatic production line independently developed by Longxin Intelligent delivers full closed-loop control from slurry preparation to finished product discharge through process integration and equipment innovation.
The complete production line takes the high-flow disc bead mill as the front-end core to complete nano-scale ultrafine grinding of active ingredients, followed by a DF-specialized spray granulation dryer that converts homogeneous and stable slurry directly into free-flowing pellets with controllable moisture content and narrow particle size distribution. Equipped with a PLC central control system, online monitoring modules, temperature & humidity sensor networks and a Clean-in-Place (CIP) one-touch cleaning system, the line supports unattended intelligent operation and precise quality control.
Breakthrough Proprietary Craftsmanship: Synergistic Advantages of High-Flow Disc Bead Mill & Spray Granulation Dryer for DF Industrialization
Longxin Intelligent’s combined solution of high-flow disc bead mill and spray granulation dryer is far more than a simple series connection of equipment; it represents in-depth integration of process logic, energy matching and intelligent control, forming an efficient tandem system for DF mass production.
High-Efficiency Milling to Guarantee Superior Slurry Quality
The high-flow disc bead mill adopts double mechanical end-face seals, polyurethane liners and high-density zirconia grinding media, paired with an optimized rotor structural design. It delivers continuous grinding capacity of several tons per hour with low energy consumption. Its unique cooling system maintains stable temperature during long-hour operation to prevent thermal decomposition of heat-sensitive technical materials. Post-grinding slurry achieves a D90 particle size of 1–10 μm, providing high-stability, low-viscosity feedstock ideal for subsequent spray drying.
Precision Drying for One-Step Pellet Forming
The matched DF-specific spray granulation dryer employs pressure atomization combined with co-current/mixed-flow drying modes, equipped with adjustable hot air distributors and multi-stage cyclone separation systems to ensure uniform heating and controllable residence time of pellets inside the drying tower. The finished DF pellets are nearly spherical with excellent flowability, moisture content below 0.5% and rapid disintegration performance, fully complying with technical specifications for DF formulations.
Automated Integration to Improve Overall System Efficiency
The entire production line realizes interlinked operation via the central control system. All procedures including feed metering, grinding parameter adjustment, drying temperature curve setting and finished product packaging are monitored digitally throughout the workflow. Built-in online detectors feed back real-time slurry particle size variations to dynamically adjust the rotational speed of the bead mill; high-precision temperature sensors conduct non-contact drying inspection to guarantee consistent finished product quality. Notably, the embedded one-touch CIP cleaning system carries out programmed flushing for grinding chambers, conveying pipelines and nozzle assemblies, effectively eliminating cross-contamination between batches and greatly enhancing flexibility and safety for multi-product switching.
Core Technology Unveiled: Innovative Breakthroughs of Longxin High-Flow Disc Bead Mill
Custom-engineered for high-solid-content and high-viscosity pesticide slurries, the high-flow disc bead mill developed by Longxin Drying boasts the following technical strengths:
Ultra-High Capacity Design: Single-unit throughput reaches approximately 1 ton per hour, compatible with thousand-ton-scale DF production lines;
Efficient Energy Conversion: Variable-frequency drive motors and multi-stage disc rotors lift grinding efficiency by over 40% compared with conventional equipment;
Long-Service Wear-Resistant Construction: Inner cylinders, rotors and separation screens are manufactured from yttria-stabilized zirconia ceramics, offering superior corrosion and abrasion resistance with a service life three times longer than standard alternatives;
Intelligent Temperature Control System: Jacket circulating cooling plus internal forced heat dissipation minimizes temperature fluctuations within the grinding zone;
Modular Configuration: Easy disassembly and maintenance, supporting rapid replacement of grinding media and screen specifications to accommodate diverse product process requirements.
Custom-Built Equipment: Technical Highlights of DF-Specific Spray Granulation Dryer
Tailored to DF’s unique demands for pellet morphology, flowability and residual solvent levels, Longxin Drying has developed a full series of DF-dedicated spray granulation dryers featuring the following core merits:
Pressure Atomization System: Fitted with high-precision ceramic nozzles for concentrated atomized particle size distribution and uniform granulation;
Anti-Adhesion Tower Design: Tower wall pulse vibration hammers paired with an upgraded uniform air distribution system effectively avoid wet powder adhesion;
Multi-Stage Material Recovery Setup: A three-level recovery system consisting of primary cyclone separators, bag dust collectors and wet scrubbers achieves a powder recovery rate exceeding 99.5%;
Optional Inert Gas Protection: A nitrogen-circulating closed drying module is available for formulations involving flammable solvents to ensure production safety.
New Craftsmanship Powers a Brighter Future: Building a New Intelligent Engine for Green Agriculture
The Chinese character "Xin" embodies exquisite craftsmanship and the source of technological innovation. Centered on proprietary "Xin" craftsmanship, Longxin Drying’s fully automated DF production line combining high-flow disc bead mills and spray granulation dryers represents not merely equipment upgrades, but a revolutionary shift in manufacturing philosophy. Supported by three core pillars — high efficiency, environmental friendliness and operational safety — the line aligns with the global trend toward greener and reduced-usage pesticide formulations, serving as a vital tool to advance the green transformation of agriculture.
The brand-new DF production unit integrates an advanced real-time monitoring platform that digitally governs all key parameters throughout the workflow, including temperature, humidity, particle size, air volume and pressure. Intelligent online inspection delivers ultra-precise moisture control, while the one-touch cleaning system enables automatic sanitation of equipment and pipelines to eliminate cross-contamination risks at the source. This DF production line transforms liquid raw materials into solid finished goods and shifts manual operation to full automation and intelligence. It embodies the ingenuity of every R&D engineer, where high-end proprietary equipment and self-developed processes converge to deliver more intelligent and stable manufacturing.
Looking ahead, Longxin Drying will continue to deepen its focus on pesticide formulation equipment, driving industrial upgrading through technological innovation and supplying globally competitive turnkey solutions to clients worldwide. We firmly believe that our proprietary "Xin" craftsmanship secures not only immediate advantages but also a prosperous future — an intelligent, efficient and greener new era for modern agriculture.Read More
Pursuing Ultrafine & High-Purity Materials | Nano Grinding & Spray Drying Production Line for Spherical Alumina Separator Thermal Conductive Materials Boosts Lithium Battery SafetyExplosive Market Demand: Spherical Alumina Acts as Core Guarantee for Separator Thermal Conductive Materials
Amid the explosive growth of the new energy vehicle market, its whole industrial chain has entered a rapid development phase. Battery thermal management systems, the core link directly related to personal safety, are seeing exponentially rising demand for high-performance thermal conductive materials. Boasting high thermal conductivity (30–42 W/(m·K)), outstanding flowability, high filling ratio and excellent insulation & flame retardancy, spherical alumina has become the primary filler for thermal interface materials.
More crucially, in the lithium battery industry, refined alumina (including spherical alumina, boehmite, etc.) serves as an irreplaceable safety barrier as the key functional coating material for battery separators. The mainstream lithium battery separators are mainly made of polyethylene (PE) and polypropylene (PP), which feature low melting points (130–165°C) and poor thermal stability. Under high temperature or local overheating, they tend to thermally shrink or even rupture, easily triggering internal short circuits, fire hazards and explosions. Coating a layer of ultrafine high-purity alumina ceramic on one or both sides of separators can raise their heat resistance to over 500°C, effectively restrain thermal shrinkage, enhance mechanical strength and electrolyte wettability, thus drastically improving battery safety and cycle life.
As the world’s largest manufacturer of new energy vehicles and power batteries, China faces continuously surging demand for high-purity, ultrafine and spherical alumina powder, with unprecedented stringent standards on particle size distribution, purity, sphericity, dispersibility and other indicators.
High-Purity Alumina Ceramic Powder: Precision Control Chain from Raw Materials to Finished Products
The preparation of high-purity alumina ceramics constitutes a precision manufacturing chain integrating chemical purification, physical forming and high-temperature sintering, whose core lies in the ultra-fining, high-purification and spheroidization of raw powder. In traditional processes, industrial alumina has to go through multiple procedures including Bayer process purification, wet ball milling, washing & impurity removal, calcination for crystal phase transformation (α-Al₂O₃) and spray granulation to produce powder suitable for high-end ceramics or battery separator coating.
Nevertheless, conventional grinding equipment struggles to prepare nano-scale alumina slurry with D50 ≤ 1μm, narrow particle distribution, zero agglomeration and ultra-low metallic impurities. Meanwhile, traditional spray drying towers suffer from uneven atomization, turbulent hot air, low powder recovery rate and high hollow particle ratio, which severely undermine the flowability and sintering density of final powder. Therefore, the integrated production line combining nano grinding and intelligent spray drying is the key to breaking bottlenecks in manufacturing high-end alumina powder.
Longxin Intelligent: Integrated Line of High-Flow Pin-Type Nano Bead Mill & High-Temperature Spray Drying Tower for Ultrafine High-Purity Spherical Alumina Production
To address the urgent demand for high-safety battery materials in the new energy industry, Longxin Intelligent has innovatively launched an integrated production line consisting of high-flow pin-type nano bead mills and high-temperature intelligent spray drying towers. Custom-tailored for high-end powders such as spherical alumina, boehmite, activated alumina, nano alumina and high-purity granulated alumina, this line comprehensively elevates the quality of separator thermal conductive materials.
Centered on four core links: ultrafine grinding, precise separation, efficient granulation and intelligent control, the line forms a full closed-loop workflow from raw slurry to high-flow spherical powder, ensuring finished products comply with strict standards for power battery separator coating: high purity, narrow particle size distribution, high sphericity and low metallic impurity content.
How Longxin WSP Series High-Flow Pin-Type Nano Bead Mills Achieve Superior, Stable & Cost-Efficient Grinding
Longxin Intelligent WSP series high-flow pin-type nano bead mills redefine the limits of nano grinding via three core technological innovations:
Composite Turbine-Pin 3D Grinding System
Inside the silicon carbide grinding chamber, materials are subjected to dual forces of circumferential vortex flow and radial impact. Matched with 0.2–0.5 mm high-roundness zirconia beads, particles are refined through combined shear, collision and extrusion, enabling stable control of D50 between 100 nm and 2 μm.
Screenless Centrifugal Separation Technology
Fully eliminating traditional metal screens, it separates grinding media and slurry via centrifugal force fields to completely avoid screen clogging and metallic contamination. It supports ultra-long continuous operation and meets cleanliness requirements for high-purity material production.
Intelligent Closed-Loop Control System
Integrated with PLC, temperature/pressure sensors and online particle size detectors, the system can link with MES systems to realize automatic parameter adjustment, full quality traceability and flexible product changeover, compatible with multiple material systems including lithium iron phosphate, silicon-carbon anodes and boehmite.
The silicon carbide grinding chamber delivers 3 times higher thermal conductivity than stainless steel. Paired with jacket wall cooling, it maintains low discharge temperature, effectively preventing phase transformation or agglomeration of heat-sensitive materials like boehmite and stabilizing slurry performance.
High-Temperature Spray Drying Tower: CFD Simulation & Fully Self-Developed Technology for High-Sphericity Granulated Powder
Customized for high-quality slurry after nano grinding, Longxin Intelligent’s high-temperature intelligent spray drying tower features five technical highlights to guarantee flowability, sphericity and recovery rate of granulated powder:
CFD-Optimized Hot Air Distribution System
Numerical simulation precisely regulates the internal hot air flow field to realize uniform drying, eliminating local overheating or incomplete drying.
Fully Self-Developed Ultra-High-Speed Centrifugal Atomizer
Rotational speed reaches up to 20,000 rpm, generating finer atomized droplets with narrower size distribution and boosting pellet spheroidization rate.
Customizable Atomizer Disks for Multiple Scenarios
Flat disks, toothed disks and composite disks are available to adapt to alumina, boehmite and other slurries with varying viscosity and solid content.
Dual Oil-Air Cooling System with Real-Time Monitoring
Enables long-term stable operation of the atomizer under working temperatures above 200°C.
Advanced Offline Pulse Bag Dust Collector
CFD-optimized flow field structure fitted with heat-resistant filter bags (temperature resistance ≥200°C) and cold air protection system achieves powder recovery rate over 99%, minimizing loss of ultrafine powder.
Alumina powder granulated by this system boasts high sphericity and excellent flowability, which can be directly fed into automatic coating lines and greatly improve the uniformity and adhesion of separator coating layers.
Integration of Multi-Dimensional Energy-Saving Technologies: Longxin Intelligent Develops High-Efficiency Low-Consumption Spray Drying Systems
As high-energy-consuming equipment, spray drying towers usually see energy costs account for over 50% of total operating expenses. Through systematic multi-dimensional energy-saving strategies in equipment design and practical application, Longxin Intelligent effectively cuts energy consumption, lifts thermal efficiency and unifies high-efficiency drying with green manufacturing. Core energy-saving technical routes are listed below:
Hot Air Energy Management to Improve Heat Utilization Efficiency
Optimized temperature difference between air inlet and outlet: Raise inlet air temperature on the premise of qualified powder moisture content to reduce required hot air volume.
Waste heat recovery system: High-temperature exhaust gas carries 10–20% of process heat. Longxin Intelligent standardly equips air-air heat exchangers or exhaust recirculation preheating modules. Recovered waste heat can preheat fresh intake air to lower the load of main heaters, and preheat feed slurry to 40–60°C to reduce viscosity and optimize atomization effect.
Precise Regulation of Process Parameters to Cut Energy Consumption at the Source
Elevate feed solid content: Raising the solid loading of alumina slurry from 30% to 45–50% reduces water evaporation volume by nearly 30%, directly slashing energy consumption by over 20%. High-solid low-viscosity slurry produced by Longxin nano bead mills provides reliable support for high-concentration feeding.
Intelligent atomization matching: Variable-frequency centrifugal atomizers dynamically adjust rotational speed according to slurry properties to ensure uniform droplet size, avoiding secondary drying or fine powder loss caused by oversized droplets. Even atomization shortens drying duration and eliminates invalid heat loss.
Stable Continuous Feeding
High-precision screw pumps with PID flow closed-loop control eliminate temperature fluctuations induced by unstable feeding, stabilize the thermal field inside the tower and avoid repeated reheating cycles.
Optimized Equipment Structure & System Design
High-efficiency dust collection and powder recovery: Heat-resistant bag dust collectors with offline ash cleaning achieve recovery rate above 99%. Reduced material loss equals lower energy consumption per unit product. Automatic periodic ash cleaning stabilizes system pressure drop and cuts power consumption of induced draft fans.
Intelligent Control System for Dynamic Energy Conservation
3D thermal field monitoring: Multi-point sensors installed at air inlet, drying zone and air outlet build real-time thermal distribution models.
Adaptive algorithm parameter tuning: Automatically adjust inlet air temperature, atomizer rotational speed and exhaust air volume based on feed concentration and ambient temperature & humidity to keep equipment running at the minimum valid energy consumption point.
Recipe storage & one-click switching: Pre-save optimal drying curves for spherical alumina, boehmite, activated alumina and other materials to eliminate energy waste from trial-and-error process adjustment.
Intelligent Production Lines Safeguard Battery Performance: From Controllable Material Properties to Reliable System Operation
Longxin Intelligent’s integrated nano grinding & spray drying line not only solves manufacturing challenges of spherical alumina powder (ultrafine particle size, high purity and high sphericity), but also realizes batch consistency, full traceability and flexible production via full-process intelligent control. This solution has been successfully deployed in many leading battery material manufacturers to produce functional coatings such as spherical alumina and boehmite composite layers for power battery separators.
In an era prioritizing new energy safety, every micron of material precision matters to the travel safety of thousands of end users. Longxin Intelligent will keep deepening R&D of nano grinding and intelligent drying technologies, adhering to the mission of matching equipment performance with industrial demands. We deliver stable, efficient and intelligent full-process solutions for customers producing high-end powders including spherical alumina, high-purity alumina ceramic powder and boehmite, empowering the new energy industrial chain to step into a new era of higher safety and superior performance.Read MoreContact US
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- techservice@longxinglobal.com.cn
13611616575- ＋86 13611616575
＋86 13611616575