... grinding is widely used in calcite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate rock, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, ... machine, sorting, and the powders which can not reach the fineness will be brought into grinding room again, qualified powder ... is will be blown by airflow into the cyclone powder collector, ...