... grinding machine mining machine used in calcite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate applicationUltra-fine grinding machine is a powder processing equipment ... , Mohs hardness <6 non-explosive brittle material, ultra-fine grinding is widely used in calcite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate rock ...