Caustic calcined magnesite is made from nature magnesite through calcining in reverberatory furnace, rotary furnace and boiling furnace. This products calcine uniform, possess stable quality, high purity and well-cativeness, are widely used in chemical industry, animal husbandry, papermaking, production of pharmaceuticals, rubber making, and building material industry etc CCM-95 MgO 95% MIN. SiO2 2.50% MAX. CaO 1.30% MAX. LOI 3.0% MAX. CCM-92 MgO 92% MIN. SiO2 3.00% MAX. CaO 2.00% MAX. LOI 5.0% MAX. CCM-90 MgO 90% MIN. SiO2 4.00% MAX. CaO 2.00% MAX. LOI 6.0% MAX. CCM-85 MgO 85% MIN. SiO2 6.00% MAX. CaO 2.00% MAX. LOI 8.0% MAX. CCM-70 MgO 67-69% SiO2 8.00% MAX. CaO 2.00% MAX. LOI 8.0% MAX. The size can be according to the request of customer.