The main component of bauxite is alumina, which is hydrated alumina containing impurities and is a clay mineral. White or off-white, brownish yellow or light red due to iron. Density 3.9 ~ 4g/cm3, hardness 1 ~ 3, opaque, brittle. Extremely difficult to melt. Insoluble in water, soluble in sulfuric acid and sodium hydroxide solution. Mainly used for smelting aluminum and making refractories.

 

Bauxite scientific name bauxite, bauxite. Its composition is extremely complex, and it is the general term for a variety of hydrated alumina ores with very different geological sources. Such as boehmite, diaspore and gibbsite (Al2O3·3H2O); some are made up of diaspore and kaolinite (2SiO2·Al2O3·2H2O); some are mainly kaolinite, and with the The increase in kaolinite content constitutes a general bauxite or kaolinite clay. Bauxite is generally formed by chemical weathering or exogenous action, there are few pure minerals, always contain some impurity minerals, more or less clay minerals, iron minerals, titanium minerals and heavy detrital minerals and so on.

 

use:

(1) Aluminum smelting industry.

(2) Precision casting. The bauxite clinker is processed into fine powder to make a mold and then cast accurately.

(3) For refractory products. The high bauxite clinker has a fire resistance of up to 1780, strong chemical stability and good physical properties.

(4) Aluminum silicate refractory fiber.

 

Technical conditions for the amount of bauxite used for refractories:

 

Grade chemical composition/% refractoriness volume density Al2O3CaOFe2O3 special grade>85<0.6<2.0>1790>3.0 first grade>80<0.6<3.0>1790>2.8 second grade A 70~80<0.8<3.0>1790>2.65 second grade B 60~70<0.8<3.0>1770>2.55 third grade 50~60<0.8<2.5>1770>2.45 high aluminum aggregate: bauxite aggregate is also called refractory aggregate, high grade is called high aluminum aggregate, it It is an indispensable raw material in refractory castables. It can be mixed with high-alumina cement, fine powder and water in proportion to produce very high-strength refractory concrete. The bauxite aggregate produced by Zhengquan Furnace Material Factory in Yangquan City uses high-grade dense Alumina is calcined by a rotary kiln. It has the characteristics of high density and high refractoriness. Product specifications: 0-3mm, 3-6mm, 10-15mm, 100-600 mesh, can also be produced according to user requirements.