About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
|
| Presentation Title |
The Feasibility Research of Sodium Removal From Red Mud by Carbothermal Reduction |
| Author(s) |
Tao Xiong, Wenyang Li, Wenzhou Yu |
| On-Site Speaker (Planned) |
Tao Xiong |
| Abstract Scope |
Red mud, a byproduct from alumina production process, is posing significant environmental challenges due to its high sodium content. However, the conventional sodium removal methods are inefficient or cause secondary pollution. In order to utilize red mud as well as protect the environment, new approaches for sodium removal from red mud should be developed. In this work, a carbothermal reduction method was suggested to remove sodium from red mud and its feasibility was analyzed. The thermodynamic calculation and experimental results show that the NaAlSiO4 in red mud can be decomposed to sodium gas and calcium aluminosilicate with the assistance of CaO and C under the vacuum condition. Based on this, the sodium in red mud can be removed and recycled from the dust after the carbothermal reduction. To sum up, this approach achieves complete sodium removal and will not result in secondary pollution, showing a potential for industrial application. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Pyrometallurgy, Recycling and Secondary Recovery, |