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 content 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. It has been proved that rare earth elements (REEs) can 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 content influenced arsenic removal by adding lanthanum in bearing steel, and an optimal sulfur content of approximately 100 ppm for maximum dearsenication rate at an initial arsenic level of 150 ppm was obtained. Both insufficient and excessive sulfur reduce the removal efficiency of arsenic. These findings offer a novel control strategy for solving the problem of residual element enrichment in steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Other, Other |