With the development of steel-making technology this year, the role of steel package is not only steel container, the whole began to think of multi-functional direction development.The use conditions of steel package lining are increasingly strict, it not only suffers the erosion and impact of high temperature steel water drinking slag, but also constantly receives the stirring and rinse of steel, so the steel package lining refractory has become one of the key factors to improve the life of steel package.In recent years, with the development of carbon refractory material, there have been several major changes have taken place, gradually from the previous use of clay brick, high aluminum brick, to now a new aluminum magnesium carbon package material, improve the service life of the steel package.There is no doubt that the development of aluminum magnesium carbon brick brings new ways for steel package lining refractory.

Performance of aluminum-magnesium carbon steel clad lining brick

Al-Mg-C brick is a carbon refractory material based on Al2O3 matrix, Al2O3 content of 80%, with high aluminum clinker as the skeleton, adding an appropriate amount of magnesia, scale graphite, water glass or asphalt modified resin binder produced by many refractory products.

Al-addition of MgO, Mg-C brick can be sintering under high temperature conditions to form secondary MA spinel, whose melting point is 2135 C, high corundum melting point (2050 C), the high crystal phase of Mullite melting point (1810 C), and its small thermal expansion rate and elastic modulus.Therefore, the MA spinel as the binding phase has a high fire resistance and load softening temperature, and has a good thermal shock stability.

Due to the addition of carbon elements, reduce the temperature gradient in Al-Mg-C bricks, and correspondingly reduce the thermal stress in the body, and eliminate the crack and peeling phenomenon of high aluminum bricks.Due to its high sublimation point, large thermal conductivity, high thermal expansion rate, low surface energy, and many no-co-melting points with Mgo, al2o3, sio2, etc.When evenly distributed in the matrix composition of the brick, the high temperature structural stability energy of AL-mg-c brick is enhanced after graphite-coated carbon. At the same time, due to the thermal surface tension of graphite, the penetration of steel slag is effectively prevented, and the corrosion resistance practicability of AL-mg-c brick is improved.