Raymond Mill HGM series c an be used for the highfine power processing in minerals, chemicals, construction, and other industries. Raymond mills can be used to process more than 280 nonflammable and explosive materials with a Mohs hardness of less than9and a humidity of less than 6%,such as barite, calcite, and potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated ...