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Alpine Fluidized Bed Jet Mills for Toll Processing

Alpine Fluidized Bed Jet Mills for Toll Processing

The jet mills at Hosokawa’s tolling facility are capable of ultra-fine milling of chemicals and minerals down to D97 < 3 µm. The Alpine AFG was designed to process abrasive and hard materials with a Moh’s hardness of 10. Hosokawa’s jet mill can also process heat sensitive materials; there is little temperature rise during operation. Jet mills achieve these results by accelerating feed particles in a high velocity gas stream and colliding them at a focal point. The materials fracture upon impact with each other. An internal dynamic classifier controls particle top size and recycles oversized particles to the milling zone.

Typical size reduction results on the AFG

  • Graphite: 150 µm feed material – milled down to D97 < 5 µm
  • Ceramic Rare Earth: D97: 40 µm feed material milled to D97: 5 µm
  • Activated Carbon: D97: 300 µm feed material  milled to D99: 20 µm
  • Glass: 3/8” frit milled down to D97: 20 µm
There are six jet milling systems available for custom processing at Hosokawa Micron Powder Systems ranging from the pilot scale 100 AFG up to the production model 400 AFG. Large AFG jet mills are available for purchase for customers requiring higher throughput rates. These jet mills can be run continuously, milling up to 800 lbs/hour at D97 < 3 µm.


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