Zenith Raymond mill is extensively utilized in ultrafine powder processing of barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, heat insulator and various nonflammable and nonexplosive products with Mok's hardness not a lot more than and humidity below 6%.