Raymond mills can be used to process more than 280 non-flammable and explosive materials with a Mohs hardness of less than 9.3 and a humidity of less than 6%, such as barite, calcite, and potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum ...