About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Recycling and Sustainability for Emerging Technologies and Strategic Materials
|
Presentation Title |
Hydrometallurgical Recycling of Bauxite Residue |
Author(s) |
Himanshu Tanvar, Brajendra Mishra |
On-Site Speaker (Planned) |
Himanshu Tanvar |
Abstract Scope |
Alumina production through Bayer’s process results in generation of tremendous amount of toxic waste called red mud or bauxite residue. Production of 1 to 3 ton of alumina requires 3.3 to 6 ton of bauxite ore, which results in production of 1.5 to 4 ton residue. The annual production of bauxite residue reaching 120 million ton raises concern regarding handling, storage, and recycling. Presence of toxic heavy metals, high soda content, and fine particle size makes it detrimental for plant and life forms. Bauxite residue is rich in valuable metallic oxides of aluminum (5 – 40 wt%), iron (10 – 60 wt%), titanium (1 – 15 wt%), and rare earth (10 – 150 ppm). However, the complex structure and interlocking of different elemental phases make the separation process difficult. The following research is focused on hydrometallurgical recovery of different products (high purity magnetite, alumina, rare earth oxides) from bauxite residue. |
Proceedings Inclusion? |
Planned: |
Keywords |
Recycling and Secondary Recovery, Hydrometallurgy, Extraction and Processing |