Refractory clay is used in the building materials industry to make high-alumina bricks, phosphate high-alumina refractory bricks, and high-alumina fused cast bricks for cement kilns and glass melting kilns. High-alumina clay is calcined and then mixed with limestone to make aluminum-containing cement. This cement has the characteristics of quick-setting ability, corrosion resistance and heat resistance.

Refractory clay also has important uses in the grinding industry, chemical industry and ceramic industry. High alumina clay is melted in an electric arc furnace to produce abrasive materials, among which fused corundum abrasive is currently the most widely used abrasive, accounting for 2/3 of all abrasive products. High alumina clay can be used to produce various aluminum compounds, such as aluminum sulfate, aluminum hydroxide, aluminum chloride, potassium aluminum sulfate and other chemical products. In the ceramic industry, hard clay and semi-hard clay can be used as raw materials for the manufacture of daily-use ceramics, architectural porcelain and industrial porcelain.

In addition, high-alumina clay is also used in oil wells as a proppant for purifying oil, as a fertilizer in agriculture, and as an anti-slip and anti-wear paving material, etc. Hard clay is also used to make a new type of refractory and thermal insulation material - refractory fiber. It has the advantages of high temperature resistance, small thermal conductivity, acid and alkali resistance, sound absorption and light weight. It is used in metallurgy, machinery, electronics, glass, ceramics and other industries. widely.