HGM Calcium Carbonate Ultrafine Grinding Mill. Adjustable fineness: 150-3000 mesh. Output: 0.5-45t/h. Processing material: non-metallic ore with Mohs hardness less than 6. Such as limestone, marble, dolomite, kaolin, pumice, calcite, and so on. It can also process coconut shells, cocoa shells, shells, bamboo, and other materials.