Raymond mill raymond roller mill limestone grinding mill,raymond roller mill can powder more than 280 non-explosive and non-flammable materials with mohs hardness smaller than 9.3 and humidity smaller than 6%, like barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate ore and thermal ...