FIELD: equipment for fine grinding of polydispersional materials. SUBSTANCE: vortex-type mill has cylindrical grinding chamber, inlet and outlet branch pipes, and bin-type chamber connected to axial withdrawal chamber through air duct via pneumatic regulating opening. Bin-type chamber is communicated to central part of grinding chamber through charging branch pipe. Bin and device for dosed discharge of ground material are located inside bin-type chamber. EFFECT: increased efficiency, wider range of permissible operation modes and reduced loss of material. 4 cl, 5 dwg
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