What is corundum castable

Usually, the refractory castable with Al2O3 content greater than 90% is called corundum castable, and its main phase is corundum, because corundum has the characteristics of high melting point (2050 ℃) and strong slag corrosion resistance, which makes corundum castables more high refractoriness and good chemical stability. The raw material combination of corundum refractories comes in various forms, such as:

1. Use white corundum as aggregate and powder

2. Use tabular alumina and dense (sintered) alumina as aggregate, and use dense (sintered) alumina as powder;

3. Use sub-white corundum or brown corundum as aggregate, and use dense (sintered) alumina as powder;

4. Use white corundum and super-grade bauxite clinker as aggregate, white corundum as powder, etc.