... barite, gypsum, alunite, graphite, fluorite, phosphate applicationUltra-fine grinding machine is a powder processing equipment, which is mainly suitable ... hardness, Mohs hardness <6 non-explosive brittle material, ultra-fine grinding is widely used in calcite, diatomite, barite, gypsum, ... so on.working processThe working process of ultra-fine grinding machine: Bulk materials crushed are sent into the ...