Kaps Engineers sell "Ultra Fine Mill"

This screenless Ultra Fine Mill is engineered to grind soft-to-medium-hardness materials into an exceptionally fine powder. A built-in water circulation jacket keeps grinding temperatures lower, allowing certain heat-sensitive materials to be processed, while the design allows easy cleaning and quick product changeover to minimize downtime. Feed is regulated by a screw feeder, and air-swept material passes through a complex grinding path where attrition combined with a turbo (jet) effect produces ultra-fine particles; an annular gap plate governs material flow through the mill, with powder discharged at the bottom for collection. Various configuration options are available to suit user needs.