... :Magnesia alumina brick is made from magnesite and industrial alunimium as raw material which is a kind of alkali refractory. 1. ... %1820Cold Crushing strength MPa40300.2 MPa Softening temperature under load,°C,16001580Permanent linear change,% 1650°CX2h——Bulk density,g/cm3——ApplicationSodium ... ,glass furnace,coking furnace,metallurgical furnace and other furnaces. Magnesia Refractory Brick For Sale