Ladle is an important and indispensable equipment in the steelmaking industry. As the refractory material for the lining of the ladle, several major changes have taken place. In the past, traditional sintered clay bricks and third-class alumina bricks were used. This refractory material showed poor spalling resistance and corrosion resistance during use, and had a low service life, only 10 times on average. The treatment can only reach about 20 times. With the development of steelmaking technology, the requirements for refractory materials in the lining of ladle linings in the outer refining of molten steel have increased. In the early 20th century, the use of integrally cast magnesium-aluminum ladle lining materials was once promoted. This kind of lining has good integrity and significantly improves the service life, but there is a long baking time for the ladle, and there is a serious phenomenon of slag drop. For most small and medium-sized steel plants without special equipment, unpacking is difficult. In order to make up for this shortcoming, aluminum-magnesium non-fired bricks were successfully applied. The lining brick is easy to build, short baking time and easy to unpack, but still has the problems of easy slagging and poor resistance to peeling. On this basis, in order to overcome the problem that the lining of the aluminum-magnesium non-burned brick ladle is easy to cat slag, the aluminum-magnesium-carbon non-burnable brick was developed in the later period to replace the aluminum-magnesium non-burnable brick. This material combines the properties of aluminum-magnesium materials and carbon-containing materials. The main advantages of aluminum-magnesium-carbon non-fired bricks are: no brick joint melting loss, good slag resistance and thermal vibration resistance, overcoming the structural spalling phenomenon caused by the penetration of molten steel and slag, and significantly improving the service life. Because the product is not fired or fired at low temperature, it saves energy, reduces costs, and has obvious economic benefits, which has attracted people's attention. Magnesia brick