Bauxite, bauxite grinding stage

Name bauxite ore bauxite, bauxite. Its composition is very complex and is very different hydrous aluminum ore collectively variety of geological sources. If a boehmite, a diaspore and gibbsite (Al2O3 · 3H2O); some boehmite and kaolinite (2SiO2 · Al2O3 · 2H2O) accompanied constitution; some with kaolinite, and with increased kaolinite content, constitute general of bauxite or kaolin clay stone. Bauxite is generally chemical weathering or exogenous role in the formation, there are few pure mineral, mineral always contains some impurities, or less contain clay minerals, iron minerals, titanium minerals and detrital heavy minerals and so on. Bauxite is not enough to define the name of unity, which is related to resources and industrial needs of individual countries. Each time the name is also inconsistent, but basically similar. In our country the general said: "The bauxite ore means of a high aluminum content (over 40%), aluminum silicon ratio is greater than 2.5 persons (A / S≥2.5), which are less than this value is known as clay minerals or aluminum Soil shale rock or aluminum. " In China has proven reserves of bauxite, a water bauxite accounted for about 98% of the total reserves. Currently, the state known occurrence of bauxite 49. China has abundant bauxite resources, about 37 million tons, ranking the world, and Guinea, Australia and Brazil belong to the world's bauxite resources in the country. But the state high bauxite production for refractories only Guyana and China, the bauxite high iron content in other countries, and more for aluminum and abrasive material. Our bauxite resources are relatively abundant in the country 18 provinces, autonomous regions and municipalities have been identified bauxite origin of 205, of which 72 major origin (excluding Taiwan). Mainly located in Shanxi, Shandong, Hebei, Henan, Guizhou, Sichuan, Guangxi, Liaoning, Hunan and other places. Use