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Product Details

Al2O3 75-85% Bauxite Powder for Refractory

Bauxite Sand (Powder), is a new senior aluminasilica refractories. It can be used as coating or stuccoing for lost wax casting and refractory aggregate for kinds of casting coating.
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  • 200 Mesh


  • 25083000


Calcined bauxite is one of the principal ore of aluminum. Calcined bauxite contains hydrous aluminum oxides and aluminum hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas. Calcined bauxite is obtained by calcining (heating) superior grade bauxite at high temperature (from 85O℃ to 1600℃). 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%.

bauxite powder 4

Chemicals Composition & Physical Property

Grade Al2O3 Fe2O3 TiO2 CaO+MgO K2O+Na2O Bulk Density (g/cm3) Refractoriness ℃ Ignition Loss
I ≥85 1.0 4.0 0.8 0.5 >3.5 1800 ≤0.5
II 80 1.5 5.0 1.0 0.7 >3.2 1750 0.5
III 75 2.0 5.0 1.0 0.8 >3.0 1700 0.5

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.

Rotary Kiln Calcined Bauxite