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address：China Liaoning Yingkou City Nanlou Dongtai Refractory Co., Ltd.
Website : en.ykdtnh.com
Magnesia carbon brick is a high melting point basic oxide magnesium oxide (melting point 2800 ° C) and a high melting point carbon material which is difficult to be infiltrated by slag as a raw material, and various non-oxide additives are added. A non-burning carbon composite refractory material formed by a combination of carbonaceous binders. Magnesia carbon brick is mainly used for the lining of converter, AC arc furnace, DC arc furnace, slag line of ladle and so on.
As a composite refractory material, magnesia carbon brick effectively utilizes the strong slag corrosion resistance of magnesia and the high thermal conductivity and low expansion of carbon, which compensates for the shortcomings of poor resistance to spalling of magnesia.
Its main features are: good high temperature resistance, strong slag resistance, good thermal shock resistance and low temperature creep.
Conventional magnesia carbon bricks made with synthetic tar binders in accordance with the cold mixing process harden during tar damage and obtain the necessary strength, thus forming isotropic glassy carbon. Such carbon does not exhibit thermoplasticity, and the thermoplastic can eliminate a large amount of stress in a timely manner during baking or handling of the liner. The magnesia carbon brick produced by the asphalt binder has a high temperature plasticity due to the formation of an anisotropic graphitized coke structure during the carbonization of the asphalt.
The refractory material used in the early ladle slag line is directly combined with magnesia chrome brick, fused and then combined with high-quality alkaline brick such as magnesia chrome brick. After the MgO-C brick was successfully used on the converter, the MgO-C brick was also used in the refining ladle slag line, and good results were obtained. At present, China and Japan generally use resin-bonded MgO-C bricks with a carbon content of 12% to 20%. In Europe, asphalt-bonded MgO-C bricks are used, and the carbon content is generally about 10%.