| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bauxite Residue Valorization and Best Practices
|
| Presentation Title |
Innovative Hydrometallurgical Methods for Extracting Metallic Oxides from Bauxite Residue |
| Author(s) |
Himanshu Tanvar, Brajendra Mishra |
| On-Site Speaker (Planned) |
Himanshu Tanvar |
| Abstract Scope |
The Bayer process, commercialized in the late 1800s, remains the predominant method for alumina production, accounting for over 95% of global output. However, this process generates a significant quantity of solid residue, commonly known as bauxite residue or red mud. For each ton of alumina produced, approximately 1 to 1.5 tons of this residue is generated, leading to a global stockpile estimated at 3 to 4 billion tons stored in containment dams. The current recycling rate of bauxite residue is less than 5%, with major applications in the cement industry. This research aims to scale up a hydrometallurgical process for recovering various metallic oxides from bauxite residue and provide guidelines for industrial application. Large-scale laboratory trials (15-20L scale) were conducted to extract high-purity magnetite, alumina, titanium dioxide, silica and calcium carbonate. Additionally, the potential for recovery of rare earth elements (scandium) within the process flowsheet was also evaluated. |
| Proceedings Inclusion? |
Planned: TMS Journal: Journal of Sustainable Metallurgy |
| Keywords |
Hydrometallurgy, Recycling and Secondary Recovery, Sustainability |