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Calcined bauxite
Calcined bauxite is one of the principal ores of aluminum. Bauxite contains hydrous aluminum oxides and aluminum hydroxides formed through the laterization of aluminous rocks in tropical and subtropical areas. Bauxite is obtained by calcining (heat
Product Details
Calcined bauxite is one of the principal ores of aluminum. Bauxite contains hydrous aluminum oxides and aluminum hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas. Bauxite is obtained by calcining (heating)superior grade bauxite at high temperatures (from 85OC to 1600C). It 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%.
| Item | A12O3 min | Fe2O3 max | TiO2 max | Sio2 max | KO2+NaO2min | CaO+MgOmin | Bulk Density(g/cm3) | Lgnition Loss |
| I | 75% | 3.00% | 4.00% | 8% | 0.40% | 0.60% | >2.7 | ≤0.5 |
| II | 80% | 3.00% | 4.00% | 8% | 0.40% | 0.60% | >2.8 | ≤0.5 |
| III | 83% | 2.00% | 4.00% | 8% | 0.40% | 0.60% | >3.0 | ≤0.5 |
| IV | 86% | 2.00% | 4.00% | 8% | 0.30% | 0.60% | >3.2 | ≤0.5 |
| v | 88% | 1.80% | 4.00% | 7% | 0.25% | 0.60% | >3.25 | ≤0.5 |
Applications
1. Producing bauxite cement.
2. Abrasives.
3. Ceramics industry.
4. Chemistry industry for all kinds of aluminum compounds.
5. Aluminium metallurgy.
6. Precision casting / Investment casting: bauxite grog fines can be made into the mold for precision casting.
7.Refractory: Aluminium silicate refractory fiber mixing magnesia and bauxite grog with binders to pour the molten steel ladle.
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