| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina & Bauxite
|
| Presentation Title |
Granulometry Impact on Digestion Efficiency and Cost-economics in Alumina Refinery for East Coast Bauxite (INDIA) |
| Author(s) |
Suchita B. Rai, M.J. Chaddha, Prachiprava Pradhan, K. J. Kulkarni, M. Panchal, A. Agnihotri |
| On-Site Speaker (Planned) |
Suchita B. Rai |
| Abstract Scope |
Due to the fast depletion of bauxite resources, beneficiation is a crucial step mainly to reduce silica and iron content. Crushing, grinding, and sieving the bauxite in various size fractions are essential to determining suitable feed size during alumina production. East Coast bauxite was grounded and crushed into different granulometry ranging from +2.8 mm to -0.045 mm. Al2O3 enriched in the coarser fractions, while SiO2, Fe2O3, and TiO2 content increased in finer fractions. There is a decrease in digestion efficiency from coarser to finer size, increasing the specific bauxite and caustic soda consumption. Consequently, up-gradation can be accomplished by discarding a few finer sizes. With an improvement in bauxite quality, for a 1-million-tonnes alumina/annum plant capacity, caustic soda consumption can be reduced by approximately 2160 tonnes of NaOH with a savings of 18000 tonnes of process bauxite. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Hydrometallurgy, Extraction and Processing |