When MgO-C bricks are used for refining ladle furnaces and ladles, they are mainly used in clearance and slag lines. According to the operating conditions, the refractory materials used in these parts must have high temperature resistance, thermal shock resistance, and resistance to mechanical corrosion caused by slag erosion. Therefore, magnesia-chromium refractories were used in these parts in the past, but considering the pollution of chromium to the environment, the amount of chromium has been reduced, and now magnesia-carbon bricks are used.
Since the magnesia-carbon bricks in the new ladle will be seriously damaged during the preheating process, the loose decarburized layer can reach a thickness of 30~60mm. This layer of belt is washed away during the injection of molten steel, bringing the magnesia grains into the slag. Obviously, preventing the carbon in the magnesia-carbon brick from being burned during preheating has become one of the important steps to improve the service life of the magnesia-carbon brick at the ladle clearance and slag line. Its technical measures, in addition to adding composite antioxidants to magnesia-carbon bricks, the key is that the surface of magnesia-carbon bricks should be covered with alkali-containing low-melting glass phase liquid after lining to protect magnesia-carbon bricks. Carbon is not burned during the preheating of the ladle.
Ladle Magnesia Carbon Brick
