HGM Ultrafine Grinding Mill is an ideal equipment for grind non-explosive, non-flammable and brittle materials which Moh's hardness not more than six grade, like calcite, chalk, limestone, dolomite, kaolin, gypsum etc. Product fineness can be controlled between 400-3000 . This mill can be used widely in metallurgy, chemical combination, construction, mining, cement and other fields.