Al2O3-MgO series castables are mainly divided into three classes: high, middle and low class. High class castable is made of electric fused white corundum, sintered tabular corundum and electric melted magnesia etc, it is mainly used in converter, electric furnace ladle lining and refining ladle, which has excellent corrosion resistance to slag and impermeability.

Al2O3-SiO2 series castables are characterized by high strength, high service temperature, excellent abrasion resistance and corrosion resistance. It includes dense high strength refractory castable, low cement refractory castable, cement-free refractory castable and corundum refractory castable. They can be used in pouring, ramming or spray coating.