About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management: Resource Efficient Processes
|
| Presentation Title |
Thermodynamic analysis of Fe-Si alloy and CaCO3 prepared from steel slag by molten salt under CO2 atmosphere |
| Author(s) |
Pengzhen Li, Ying Chen, Hongyan Yan, Yan Wang, Bo Yuan |
| On-Site Speaker (Planned) |
Pengzhen Li |
| Abstract Scope |
CO2 utilization and solid waste treatment and have become a hotspot globally.This paper proposed a new idea of preparing Fe-Si alloy and CaCO3 with steel slag in NaCl-KCl by using molten salt electrolysis with CO2, and theoretical feasibility was analyzed through thermodynamic study. The results showed that no chemical occurred in the molten salt at 700 ~ 900℃ and without applying an electric current. Within the theoretical decomposition voltage rang of -2.26V ~ -1.45V, the electroreduction sequence of each metal in the slag was Fe、Si. During deoxidation, CaO is released from CaO-bearing compounds in the steel slag and subsequently reacts with CO2 to produce CaCO3, enabling CO2 sequestration. Finally, the Fe-Si alloy and CaCO3 are separated by magnetic separation. Based on the above analysis, it can be concluded that the preparation of Fe-Si alloy and CaCO3 from molten salt electrolytic steel slag under CO2 atmosphere is theoretically feasible. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Electrometallurgy, Extraction and Processing |