China Ultrafine Calcium Carbonate Powder Grinding Machine, Find details about China Calcium Carbonate Grinding Machine, Calcium Carbonate Pulverizer from Ultrafine Calcium Carbonate Powder Grinding Machine - Zhejiang LEAP Pulverization Equipment .Sep 02, 2021 Limestone powder ground from natural limestone rock is also called Heavy Calcium Carbonate, or Ground Calcium Carbonate (GCC) (Kotaite in the United States). The grinding process of heavy calcium carbonate can be divided into coarse crushing, medium and fine crushing, powder grinding, grading and powder collection.