METHOD OF GRINDING LUMPY AND GRANULAR MATERIALS Russian patent published in 1995 - IPC

FIELD: building material industry. SUBSTANCE: method of grinding lumpy and granular material includes steps of feeding the material into a discharging tank, its further grinding, delivery of aspiration from the grinding zone and its cleaning from dust in a layer of pebbles; feeding the aspiration air from the grinding zone into the discharging tank, filtering it in the material and then together with a trapped dust feeding to the grinding zone. EFFECT: enlarged using range. 1 cl, 1 dwg, 1 tbl