... Mohs Hardness≤ 60%, such as gypsum, tale, calcite, limestone, marble, feldspar, barite, dolomite, granite, kaolin, Peng ... and continuously into the grinding chamber for powder-processing. The rollers oscillate outward to press ... you are going to crush?Soft stone(dolomite,limestone) or hard stone(granite,basalt,river pebble ... per hour? Industrial Fine limestone powder grinder for thermal power plant