The roller press is a highly efficient and energy-saving choice for grinding hard and medium hard materials. It is widely used in manufacturing and/or processing of raw meal, cement, slag non-ferrous metals and iron ore. When upgrading the capacity of ball mill systems, it is the best choice of equipment. A roller press can be used as a pre-grinding system or in a combined grinding system with ball mills. Independently, it can also operate as a finish grinding system.