Sand making machine is a crushing equipment which has been developed successfully in the production and development of SBM mine for many years. The machine has roller pressing, grinding, impact and other integrated mechanical crushing performance.    It is widely used in talc, calcite, calcium carbonate, dolomite, potassium feldspar, bentonite, kaolin, graphite, carbon and other Mohs hardness of less than 7, moisture within 6% of the non-metallic minerals grinding, it is a kind of crushing equipment which is truly efficient, energy saving and especially suitable for deep processing of non-metallic minerals.    Sand making machine has four advantages in grinding calcium carbonate. 1. High efficiency and high yield, energy saving and environmental protection; 2. Reliable operation, low cost, and convenient maintenance; 3. Complete set of equipment and wide applicability; 4. Cost-effective and investment province.