Magnesia-carbon bricks are made of high-melting alkaline oxide-magnesium oxide (melting point 2800℃) and high-melting carbon materials that are difficult to be infiltrated by slag, and some non-oxide additives will be added during the production.As a composite refractory material, magnesia carbon bricks effectively utilize the strong slag corrosion resistance of magnesia and the high thermal conductivity and low expansion of carbon, which compensates for the shortcomings of poor spalling resistance of magnesia.