About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
REWAS 2022: Poster Session
|
Presentation Title |
Fe-Si Alloy Preparation and Alumina Extraction from Red Mud and Silica Fume via Vacuum Carbothermal Reduction |
Author(s) |
Peng Wei, Wenzhou Yu, Hao Chen, Joseph Emmanuel Nyarko-Appiah |
On-Site Speaker (Planned) |
Peng Wei |
Abstract Scope |
With the increasing awareness of environmental protection, the disposal of solid waste such as red mud (RM) and silica fume (SF) has attracted widespread attentions. In this study, a novel method by recycling RM and SF simultaneously was proposed for preparing Fe-Si alloy and extracting alumina. The process is mainly composed of vacuum carbothermal reduction and magnetic separation. The results show that Fe-Si alloy was successfully synthesized during the vacuum carbothermal reduction and it was effectively separated during the magnetic separation. Additionally, after the magnetic separation, the non-magnetic portion mainly contains alumina and it can be a potential raw material to produce alumina by the Bayer process. This process could recycle RM and SF simultaneously, and almost no waste residue was generated. Therefore, it provided a clean and sustainable route for synergistic recycling of RM and SF. |
Proceedings Inclusion? |
Planned: |
Keywords |
Recycling and Secondary Recovery, Sustainability, Environmental Effects |