raymond mill,raymond roller mill, limestone grindingmill. Raymond roller mill can powder more than 280 non-explosive and non-flammable materials with Moh's 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 ...