What is magnesium carbon brick
Magnesium carbon brick is made from high melting point alkaline oxide magnesium oxide (melting point 2800 ℃) and high melting point carbon material that is difficult to be infiltrated by slag, with various non oxide additives added. A non burning carbon composite refractory material made by combining carbonaceous binders.
Magnesium carbon brick is made from high melting point alkaline oxide magnesium oxide (melting point 2800 ℃) and high melting point carbon material that is difficult to be infiltrated by slag, with various non oxide additives added. A non burning carbon composite refractory material made by combining carbonaceous binders. Magnesia carbon bricks are mainly used for lining converters, AC arc furnaces, DC arc furnaces, slag lines in steel ladles, and other parts.
Magnesium carbon brick, as a composite refractory material, effectively utilizes the strong slag erosion resistance of magnesia sand and the high thermal conductivity and low expansion of carbon, compensating for the biggest disadvantage of poor spalling resistance of magnesia sand.
Its main characteristics include: good high temperature resistance, strong slag resistance, good thermal shock resistance, and low high-temperature creep.
preparation process
Traditional magnesia carbon bricks made using synthetic tar binders according to the cold mixing process undergo hardening and obtain the necessary strength during tar damage, thus forming isotropic glassy carbon. This type of carbon does not exhibit thermoplasticity, and its thermoplasticity can effectively relieve a significant amount of stress during lining baking or operational use. Magnesia carbon bricks produced with asphalt binders have high high-temperature plasticity due to the formation of anisotropic graphitized coke structures during asphalt carbonization.
