The caustic calcined magnesite is made from nature maguesite thro-ugh calcining in reverberatory fur-nace, rotary furmace and boiling f-urnace. This products calcine unif-orm, possess stable quality, highp-urity and well-cativeness, are used widely in paper making, chemical i-ndustry, production of pharmaceuti-cals, animal husbandry, rubber mak-ing refractory material and bulidi-ng material industry etc. BRAND CHEM.COMP (%) MgOâÂÂ¥ SiO2⤠CaO⤠LOI⤠QM-95 95 1 1.5 3 QM-94 94 2 2 4 QM-92 92 3 2 5 QM-90 90 4 A:2.0 B:2.5 6