PURPOSE: To provide a magnesia.carbon brick capable of corresponding to severe using conditions required for magnesia.carbon bricks used as a lining material for melted metal containers such as converters or melting and reducing furnaces, having more excellent properties than those of conventional bricks on the hot strength, oxidation resistance, corrosion resistance and spalling resistance which are conditions to be fulfilled for the bricks, and having high durability.
CONSTITUTION: The characteristic of this magnesia.carbon brick is that carbon powder mainly composed of carbon black and the magnesia raw material having a particle diameter of 0.2-1mm occupies 20-60wt.% of the whole amount of the magnesia raw material and furthermore A1 or an A2 alloy having a particle diameter of ≤100μm is combinedly used depending on using conditions. The production conditions of the magnesia.carbon brick comprises adding a proper amount of an organic binder to the above-mentioned raw materials, mixing and molding the mixture, thermally treating the molded product at 150-300°C or reducing and thermally treating the molded product at 800-1500°C, and subsequently subjecting the treated product to the impregnation with tar.
YAMADA SHOICHIRO
KATAOKA KOUICHIROU
SATO TAKAYOSHI
OKUYAMA NOBORU
MATSUKI YOSHIMASA
NIPPON STEEL CORP