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Calcined Bauxite


Calcined Bauxite

Calcined Bauxite is obtained by calcining (heating) superior grade Bauxite at high temperature (from 850 oC to 1600 oC). 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 82 % to 86 %. The heating is carried out in rotary kilns. Calcination is done at different temperatures ranging from 850 oC to 1600 oC depending upon the customer’s application.

We export Calcined Bauxite for various applications such as refractory bricks, abrasives, steel polishing, etc. We provide consistency in quality and availability of Calcined Bauxite at extremely competitive prices.

Applications of Calcined Bauxite
  • Refractory Grade Calcined Bauxite (CB - I and CB - II Grade) : To make refractory grade, Bauxite is thermally treated at 1600 oC to produce Calcined Bauxite where the Alumina content is mostly above 82%.
  • Brown Fused Alumina, Proppants and Road Surfacing : To make the above grades, Bauxite is thermally treated at 1000 oC – 1200 oC to produce Calcined Bauxite where the Alumina content is anywhere between 80-88% depending on the requirement.

Minimum Order Quantity : 1 container

Specifications

Refractory Grade
Other Grades
Parameters CB - I CB-II BFA Grade Proppant Grade Road Surfacing Grade
Al2O3 MIN 83.00% 85.00% 85-88% 80-82% 83-84%
Fe2O3 MAX 4.5%max 2.80% 2.5-4% 5-7% 4.5% max
S1O2 Max 5.0%max 5.00% 3-6% 4-8% 6.0% max
TiO2 Max 4.5%max 4.00% 2-4% 3.5-4% 4.5%max
CaO MAX 2.5%max 2.00% 0.8-1.5% 0.8-1.2% 2.0-2.5%max
LOI MAX 0.50%max 0.50% 0.5-1 0.7-2.5% 0.5-3.1%GM/CC
B + D 3.1 GM/CC 3.15 GM/CC - - -