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What are the functions of bauxite?

2026-05-27

Raw material preparation: Select suitable raw materials, such as hard clay mineral resources, and subject them to preliminary processing steps like crushing and screening to obtain fine powder that meets the required specifications.

Bauxite, also known as aluminous earth or aluminum ore, is primarily composed of aluminum oxide and consists of hydrated aluminum oxides containing impurities; it is a clay-like mineral. It appears white or grayish-white, but may turn brownish‑yellow or light red due to iron content. Its density is 3.45 g/cm³, its hardness ranges from 1 to 3, it is opaque, and it is brittle. Bauxite is extremely difficult to melt. It is insoluble in water but soluble in sulfuric acid and sodium hydroxide solutions.

Bauxite is primarily composed of aluminum oxide and silicon dioxide, and it can be classified into raw bauxite and calcined bauxite. Its… The main uses are:

I. The finely ground raw alumina can serve as a raw material for ceramic proppant sand and constitutes its effective constituent.

II. Bauxite can be used to extract aluminum oxide, also known as alumina.

3. Certain raw bauxite materials can be used to produce refractory ceramics such as ceramic tiles and floor tiles.

IV. Calcined bauxite can be processed into aggregates and used as a refractory material in applications such as steelmaking and furnace lining.

5. Alumina clinker can be processed into fine powders for use in casting, refractory coatings, and other industries; it can also serve as a raw material for the preparation of polyaluminum ferric chloride, a water‑treatment agent.

6. Bauxite can also be used to produce high-grade refractory materials such as brown corundum.

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Production Process of Fine Mullite Powder

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2026-05-27

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What is alumina clinker?

Alumina‑clinker, commonly referred to as high‑alumina material, is used to produce a variety of high‑alumina refractory bricks. These bricks are widely employed in the metallurgical and other industries as refractory or corrosion‑resistant materials, particularly in electric furnace tops, blast furnaces, and hot blast stoves, where their refractory performance is exceptionally effective and superior to that of ordinary clay refractory bricks.