Corundum refractory castables utilize calcined bauxite as aggregate, with a matrix composed of calcined bauxite and fine corundum powder; the binder system is formulated using composite materials such as ultrafine powders and additives. Widely used for the linings of industrial furnaces-including boilers, blast furnace hot-blast stoves, and reheating furnaces-this material offers excellent resistance to rapid temperature fluctuations, high temperatures, and thermal shock.
The incorporation of heat-resistant stainless steel fibers effectively enhances overall structural strength and prevents damage to furnace walls. Depending on specific industrial requirements, the material is available in various types, such as chrome-corundum and zirconia-corundum. Production involves rigorous chemical analysis of raw materials and physical property testing; mix proportions are validated through trials, and finished products undergo performance testing for parameters such as flexural strength and bulk density.