... grinding machine mining equipement used in calcite, diatomite, barite, gypsum, alunite ... and low hardness, Mohs hardness <6 non-explosive brittle material, ultra-fine grinding is widely used in calcite ... , diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate rock, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllite, vermiculite, K minerals, pumice and ...