| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management
|
| Presentation Title |
Deep deashing of bituminous coal to prepare ultra-clean coal by physicochemical approach |
| Author(s) |
Chenxi Xie, Kun Lin, Zijian Su, Guang Yang, Yuanbo Zhang |
| On-Site Speaker (Planned) |
Chenxi Xie |
| Abstract Scope |
High ash content of coal is the main reason limiting its high-value utilization. The ultra-clean coal can be used as precursors for hard carbon materials, activated carbon, and carbon molecular sieves. The current methods of coal deashing are mainly physical or chemical. Bituminous coal is a commonly used precursor for carbon-based materials, whose main component of ash is silica. In this study, a physicochemical method was used for deep deashing of bituminous coal to prepare ultra-clean coal. Quartz and other minerals in the coal were removed by flotation pretreatment. The coal was then deeply deashed by NaOH-HCl leaching. Residual minerals reacted with NaOH to generate water-soluble sodium silicate and sodium silicoaluminates that were easily soluble in acid and removed. The results show that low ash coal with a content of 5.3% was obtained by flotation, and ultra-clean coal with a content of 0.9% was finally obtained in further acid-base leaching. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing 提取与加工, Hydrometallurgy 湿法冶金术, |