... grinding is widely used in calcite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate rock, limestone, dolomite, kaolin, bentonite, talc, mica ... , K minerals, pumice and so on.working processThe working process of ultra-fine grinding machine: Bulk materials crushed are sent ... , the separated powder from the discharge port is finished product, and the air return back to the top, the ...