Calcined Alumina is produced by heating alumina to certain temperatures for various amounts of time. We use state-of-the-art process-control equipment to produce a range of high-alpha Calcined Alumina with controlled soda chemistry, surface areas and size distributions. Calcined Alumina has a surprisingly wide range of uses, based on the nature and range of its properties, including purity, chemical inertness, resistance to corrosion, extreme hardness, resistance to wear and abrasion, heat resistance, dimensional stability, high thermal conductivity, and electric resistivity.
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 requiremen
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