... ore of Mohs Hardness≤ 60%, such as gypsum, tale, calcite, limestone, marble, feldspar, barite, dolomite, granite, kaolin, Peng Run soil, Maifan ... of material you are going to crush?Soft stone(dolomite,limestone) or hard stone(granite,basalt,river pebble)? What's the ... ?How many tons or cubic meters per hour? Industrial Fine limestone powder grinder for thermal power plant