4R Raymond Mill 1)simple structure & easy operation 2)high productivity & low power consumption 3)long service life Professional 4R Raymond Mill Professional 4R Raymond Mill Application:Professional 4R raymond mill is applicable to the grinding non-flammable and non-explosive materials with Moh’s hardness below 7 and moisture content below 6%, such as barite, calcite, feldspar, talcum, pencil ...