Magnesia carbon brick

The magnesia carbon brick is made of dead burnt magnesia (or fused magnesia) and carbon material (mainly crystallized graphite), and is prepared by pressing the resin as a binder and heat-treating. In order to improve oxidation resistance, an antioxidant such as a metal is often added. Magnesia carbon bricks form a carbon skeleton when used at high temperatures, and since magnesium oxide and carbon do not have a mutual solubility relationship, the excellent fire resistance of the original components is retained. Carbon has good thermal conductivity, low thermal expansion coefficient and elastic coefficient, can effectively prevent high temperature spalling and slag penetration, and is less prone to structural spalling, which greatly changes the achilles heel of metamorphic structure spalling caused by slag penetration of magnesium refractories. In addition, the carbon does not wet the slag, and the corrosion resistance is also good. This series of characteristics of magnesia carbon brick makes it an ideal lining material for thermal shock stability, erosion resistance and flaking resistance. Magnesia carbon bricks are widely used and can be used in key parts of thermal equipment such as steelmaking converters, electric arc furnaces, steel drums, and furnace refining furnaces.