Addressing Industry Pain Points: Challenges and Innovations in Traditional Drying Processes

1. 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.
2. Poor composition uniformity: Multicomponent oxides or composite alloys are prone to segregation during drying, undermining the mechanical properties of end materials.
3. 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.
4. Cumbersome post-processing workflows: Separate washing, filtration and drying procedures for precious metal production lead to low efficiency, material loss and secondary contamination.

Core Product Portfolio: Six Customized Solutions for Diverse Material Properties

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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

1. 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.
2. New Energy: Highly consistent spherical alloy powders provide core support for manufacturing high-efficiency electrodes.
3. Biomedical 3D Printing Implants: High-purity, low-oxygen powder materials enable personalized custom implant fabrication.

Continuous Innovation: Comprehensive Professional Support Across the Entire Workflow

1. 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.
2. 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.
3. 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