| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina & Bauxite
|
| Presentation Title |
Dealkalinization Effect of Carbon Dioxide in Flue Gas on Bayer Red Mud |
| Author(s) |
Chaojun Fang, Yihong Jia, Tianrui Cai, Lijuan Gao, Xiaowei Deng, Bo Lv, Yongping Wang |
| On-Site Speaker (Planned) |
Yihong Jia |
| Abstract Scope |
Red mud is a bulk solid waste generated by the alumina industry, which is difficult to use on a large scale due to its strong alkalinity. Meanwhile, carbon dioxide in flue gas is one of the main factors contributing to global warming. Therefore, this paper employs flue gas carbon dioxide to neutralize the alkaline substances in red mud. The results showed that with the introduction of carbon dioxide into the red mud at 50°C, liquid-solid ratio of 12 and aeration capacity of 30L/h for 30min, the dealkalinization rate of red mud exceeded 10%, and the reason was considered to be the acid-base neutralization reaction of carbon dioxide with sodium silica slag in red mud. The carbon dioxide in the flue gas has a certain dealkalizing effect on red mud, which can realize the dual purpose of red mud dealkalizing and carbon dioxide neutralization, which may have a good application prospect. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Environmental Effects, |