Alumina is the main raw material for refining corundum because alumina contains a large amount of alumina. Bauxite is also an extremely important economic mineral, is the main source of aluminum smelting industry. Refractories industry, cement industry is also extensive use of bauxite, followed by abrasive manufacturing and chemical industry. Bauxite mineral level, is divided by how much alumina content.
Bauxite, scientific name bauxite, bauxite. Its composition is extremely complex, is a general term for a variety of hydrated alumina ore with very different geological sources. Domestic bauxite has three appearance characteristics, the first is white to light gray, soft texture, high grade; the second is light gray to dark gray, relatively hard, broken into pieces, beans or lumps, there Obvious diagenetic characteristics; third is light yellow to ocher, hardness and fracture shape and the second is similar, but the organization is relatively thin, the grade is not as good as the first two kinds of high.
The quality of bauxite difficult to judge with the appearance of the characteristics, because of the different ore-forming environments vary widely, the following three points for the identification of reference only for reference:
1, the fracture has a bean-shaped structure, good quality, alumina content is expected to more than 75%;
2, the color is light, pure color is good;
3, fine structure and dense good.
China is rich in bauxite deposits, large new mines continue to find that only three years to submit new mineral resources in our province 800 million tons, the main component of the lithology of bauxite dihydrate, which is alumina in the bauxite Mine is the presence of diaspore form, in addition there is still part of the combination of silica to form kaolinite.
