⑴ Aluminum smelting industry. Used in national defense, aviation, automobiles, electrical appliances, chemicals, daily necessities, etc. ⑵ Precision casting. The bauxite clinker is processed into fine powder to form a mold and then precision cast. Used in military, aerospace, communications, instrumentation, machinery and medical equipment sectors. ⑶ Used for refractory products. High alumina bauxite clinker has a high refractoriness of 1780℃, strong chemical stability and good physical properties. ⑷ Aluminum silicate refractory fiber. It has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity and mechanical vibration resistance. Used in steel, non-ferrous metallurgy, electronics, petroleum, chemical industry, aerospace, atomic energy, national defense and other industries. It puts high-aluminum clinker into a high-temperature electric arc furnace with a melting temperature of about 2000-2200℃. After high-temperature melting, high-pressure high-speed air or steam injection, and cooling, it becomes white "cotton"-aluminum silicate Refractory fiber. It can be pressed into fiber blankets, boards or woven into cloth to replace refractory bricks lined with high temperature furnaces in smelting, chemical, glass and other industries. Firefighters can use fire-resistant fiber cloth to make clothes. ⑸Using magnesia and bauxite clinker as raw materials, adding appropriate binders, it is very effective for pouring steel drums as a whole barrel lining. ⑹Manufacturing alumina cement, abrasive materials, ceramic industry and chemical industry can make various compounds of aluminum.