Fluidized Bed Opposed Jet Mill

Calcined NCM powder is fed into the grinding chamber through a screw feeder. Multiple groups of horizontally opposed nozzles eject high-pressure compressed air at supersonic speed, forming an upward fluidized bed field inside the chamber. NCM particles are accelerated by the airflow and violently collide with each other in the central jet intersection zone, achieving ultrafine pulverization purely through particle-to-particle impact without any grinding medium contact, minimizing metal contamination. The airflow carries ground NCM particles upward to the high-precision turbine classifier at the top. Qualified fine NCM powder passes through the classifier blades and is collected by the cyclone separator and bag dust collector in sequence. Oversized coarse NCM particles are thrown outward by centrifugal force, fall back to the fluidized grinding zone along the chamber wall, and continue to participate in collision crushing, forming a continuous closed-circuit grinding cycle. For high-nickel NCM production, the system can be configured with a closed nitrogen cycle to isolate oxygen and prevent particle surface oxidation.