About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
|
| Presentation Title |
Effect of Sulfur and Lanthanum Contents on Arsenic Removal From Molten Steel Using Rare Earth Elements |
| Author(s) |
Zheyang Lin, Jiadong Qi, Hongpo Wang |
| On-Site Speaker (Planned) |
Zheyang Lin |
| Abstract Scope |
Increasing scrap recycling inevitably enriches low-melting-point residual elements like arsenic in steel, adversely affecting the quality and properties of steel products. Rare earth elements (REEs) have been proved to mitigate arsenic segregation by forming high-melting-point compounds. Our recent works revealed that lanthanum can remove arsenic from molten steel by forming La-S-As ternary compounds that float up the surface of the molten steel or adhere to the crucible wall. Combining mismatch calculations and experiments, this study elucidated sulfur's role in RE dearsenication and demonstrates how sulfur and lanthanum contents influenced arsenic removal in bearing steel, and an optimal sulfur content of approximately 0.0100 wt% for maximum dearsenication rate at an initial arsenic level of 0.0150 wt% was obtained. Both insufficient and excessive sulfur reduce the removal efficiency of arsenic, while higher lanthanum content enhances it. These findings offer a control strategy for solving the problem of residual elements enrichment in steel |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Other, Other |