Bauxite Ore
Coastal Exim
Bauxite Ore
Bauxite is the primary ore of aluminum (Al) and is composed mainly of aluminum hydroxides, iron oxides, and silica. It is processed into alumina (Al₂O₃), which is then refined into aluminum metal through the Hall-Héroult process.
Composition of Bauxite Ore
| Component | Percentage (%) |
|---|---|
| Alumina (Al₂O₃) | 30 – 60% |
| Silica (SiO₂) | 1 – 10% |
| Iron Oxides (Fe₂O₃, FeO) | 1 – 25% |
| Titanium Dioxide (TiO₂) | 0.5 – 4% |
| Moisture | 10 – 30% |
- High-grade bauxite contains >50% Al₂O₃ and is ideal for aluminum production.
- Low-grade bauxite may require beneficiation (removal of impurities).
Types of Bauxite Ore
- Gibbsite (Al(OH)₃) – High in alumina, low in silica, easy to refine.
- Boehmite (γ-AlO(OH)) – Requires higher temperatures for alumina extraction.
- Diaspore (α-AlO(OH)) – Harder and more difficult to refine than gibbsite.
Coastal Exim
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