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Calcined Bauxite

Bauxite aggregate is made of excellent bauxite ores, it is homogenized and calcined under advanced technology. This products are in stable index, homogeneous structure and excellent high-temperature performance.
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  • 3-5mm

  • SEPPE BAUXITE

  • 25083000


Introduction


Calcined bauxite is one of the principal ore of aluminum. Rotary kiln calcined bauxite is obtained by calcining superior grade bauxite at high temperature (from 850℃ to 1600℃) in the rotary kiln. This removes moisture thereby increasing the alumina content. Compared to an alumina content of about 57% to 58% in raw bauxite, calcined bauxite has an alumina content of 84% to 88%.


Besides, through calcination, the density and refractory resistance will also be improved to varying degrees. The grade of bauxite can be increased greatly.


The calcined bauxite can be processed into bauxite sand and bauxite powder of different particle sizes, both of which can be directly used as refractory sand. It has a very high status in the field of refractory materials. 



Chemicals Composition & Physical Property


GradeAl2O3Fe2O3TiO2CaO+MgOK2O+Na2OBulk Density (g/cm3)Refractoriness ℃Ignition Loss
I85≤2.04.00.80.5>3.518000.5
II802.05.01.00.7>3.217500.5
III752.05.01.00.8>3.0≥17000.5



Main Application

 

■Calcined Bauxite for refractory material

Such calcination of bauxite has the properties of high alumina, low iron, high hardness, small thermal expansion coefficient, high refractoriness, and stable thermal chemical performance, so it is the main raw material of producing alumina and artificial corundum refractory materials.

 

■Calcined Bauxite for precision casting

The alumina clinker which is processed into fine powder and made into cast mould can be used in military, aerospace, communications. 

 

■Calcined Bauxite for aluminum refining Industry

It can be used for national defense, aviation, automobiles, electrical appliances, chemicals, daily necessities.

 

■Calcined Bauxite for high friction surface coating

Calcined bauxite has been the most commonly used aggregate material used for High Friction Surfacing.The inherent nature of Calcined Bauxite resists shear stresses that lead to polishing of the road surface.

Besides, calcined bauxite also can be used in making refractory bricks, high alumina cement, refractory castable, rock wool and welding flux, etc...


Rotary Kiln Calcined Bauxite