Difference
| Bauxite | Calcined bauxite | |
| Ingredients and structure: | Bauxite is a natural aluminum ore whose main component is aluminum oxide (Al2O3), and usually contains impurities such as iron oxide, silicon dioxide, and titanium oxide. | After bauxite is treated by high-temperature calcination (heating), aluminum hydroxide (Al(OH)₃) is converted into aluminum oxide (Al₂O₃), and impurities may be decomposed or change their structure, thereby increasing the content and purity of aluminum oxide. |
| Physical properties: | Its physical state is the ore in its natural state, usually in powder or granular form, and its color varies depending on impurities, and may be white, gray, brown, etc. | After calcination, the crystal structure of alumina changes, usually becoming finer and denser, and the color may also change to white or light gray. |
| use: | It is directly used in the production of alumina and aluminum metal, and is also used in the production of refractories, abrasives, cement, etc. | It is mainly used to produce high-purity alumina (such as special alumina in the aluminum industry), and is also used to manufacture high-performance refractory materials, ceramics, catalysts, etc. |
Contact:
Source:
Calcined bauxite is obtained by processing bauxite, so there is a direct production connection between them.
Uses:
Despite their different uses, both bauxite and calcined bauxite are widely used in the aluminum industry, refractory manufacturing, ceramic industry and other fields, and are important raw materials for aluminum production.
Chemical composition:
Both contain alumina, but the alumina content and purity of calcined bauxite are higher.
Processing process:
After bauxite is processed by the Bayer process, it goes through the steps of digestion, precipitation, washing, drying and calcination to finally obtain calcined bauxite.
Economic value:
The processing of calcined bauxite increases its economic value and application range because it can produce products with higher purity and higher performance.
In general, calcined bauxite is the result of processing and purification of bauxite, and there is a close connection between the two. Bauxite is a raw material, while calcined bauxite is a high-value product after processing, which meets the needs of different industries.