... for magnesia ,magnesium oxide,MgO good quality, low price , timly delivery Magnesium oxide / light burned magnesite / caustic calcined magnesiteCAS No.: 1309-48-4H.S ... :Caustic calcined magnesite is made from nature magnesite through calcining in reverberatory furnace, rotary furnace and boiling furnace. This product calcine uniform, possess stable quality, high ...