Refractory clay also has important uses in grinding industry, chemical industry and ceramic industry. High-alumina clay is melted in an electric arc furnace to manufacture abrasive materials, among which fused corundum abrasive is 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 and semi-hard clays can be used as raw materials for the manufacture of household ceramics, architectural ceramics and industrial ceramics.

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