Corundum mullite brick composition

Corundum mullite bricks are a type of special refractory brick made from high-purity raw materials of alumina and silica. The composition of corundum mullite bricks includes the following materials:

1.Alumina (Al2O3): usually accounts for 60% to 80% of the total mass. It is the main component that provides high-temperature resistance, mechanical strength, and chemical stability to the bricks.

2.Mullite (3Al2O3·2SiO2): typically accounts for 20% to 40% of the total mass. It is a mineral compound that forms at high temperatures and contributes to the thermal shock resistance and low thermal expansion of the bricks.

3.Other components: Small amounts of other materials may be added to adjust the properties of the bricks, such as magnesia (MgO), zirconia (ZrO2), and chromia (Cr2O3). These materials can improve the slag resistance, thermal conductivity, and corrosion resistance of the bricks.

Overall, corundum mullite bricks are characterized by their high-temperature resistance, excellent thermal shock resistance, low thermal expansion coefficient, and good resistance to erosion and corrosion by molten metals and slags. The precise composition and proportion of each component in the bricks may vary depending on the specific application requirements and manufacturing process used.