| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina & Bauxite
|
| Presentation Title |
Effect of Thermal Activation Temperature on Pre-desilication of Low-grade Bauxite |
| Author(s) |
Chaojun Fang, Tianrui Cai, Bo Lv, Xiaowei Deng, Jinming Zhang, Zeya Zhao, Bobing Dong |
| On-Site Speaker (Planned) |
Tianrui Cai |
| Abstract Scope |
With the increase of requirements for environmental protection, the Sintering process with high carbon dioxide emission was gradually reduced in application. However, for low-grade bauxite, it was difficult to be directly economically utilized by the Bayer process, and a pre-desiliconization process was often required. This paper researched the influence of different thermal activation temperature on the pre-desiliconization process of low-grade bauxite. The results showed that the phase transformation of low-grade bauxite was not much different at different thermal activation temperatures, but the pre-desiliconization behavior was different. Compared with 650°C and 700°C, the pre-desiliconization results of low-grade bauxite after thermal activation at 600°C had a significant improvement. Only after 30 minutes of leaching, the ratio of alumina to silica of low-grade bauxite can be increased from 2.39 to 6.78. This study may have a certain significance for selecting a suitable thermal activation temperature to promote the high-efficiency pre-desiliconization of low-grade bauxite. |
| Proceedings Inclusion? |
Planned: Light Metals |