BULK MATERIAL GRINDING APPARATUS Russian patent published in 1996 - IPC

FIELD: production of powder materials. SUBSTANCE: apparatus has hopper for basic material, pneumatic pulsed grinder, outer separator, cyclone-type dust separators, ground product hopper, ejector and selective feeder, whose inlet is connected with basic material hopper and outer separator and outlet is communicated with pneumatic pulsed grinder, All members of grinding apparatus are connected through pipelines. Selective feeder is disposed between basic material hopper and grinder to allow finely dispersed powders to be produced. Fraction content of powders may be regulated by directing separated grits for additional grinding. EFFECT: increased efficiency, simplified construction and improved quality of product. 1 dwg, 1 tbl