General magnesia-carbon bricks are made of high-quality magnesia with high-purity graphite, silicon, silicon carbide and other additives, and phenolic resin as a binding agent. The basic requirements of electric furnace for MgO-C brick are:

(1) The thermal conductivity is low to ensure less heat loss and improve the thermal efficiency of the electric furnace;

(2) High thermal chemical and thermal physical corrosion resistance coefficient, which requires good volume stability;

(3) Slag resistance, peeling resistance, oxidation resistance and high compressive strength, so as to obtain low consumption and long life.