| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals
|
| Presentation Title |
Thermodynamic Properties of Sulfur in the CaO–AlO1.5–CeO1.5 Slag System at 1873 K |
| Author(s) |
Masaya Higuchi, Kazuki Morita |
| On-Site Speaker (Planned) |
Masaya Higuchi |
| Abstract Scope |
Rare earth elements (REs) have a high affinity for oxygen and are effective as deoxidizers and desulfurizers. The addition of REs to Al-killed steel in the presence of CaO flux is expected to produce CaO-AlO1.5-REOX oxides. Ce was focused on as the main component of the mish metal and the phase equilibrium of the CaO-AlO1.5-CeO1.5 system at 1873 K and the deoxidation equilibrium was measured. In this study, to confirm the usefulness of Ce as a desulfurizer, Ce was added to the Fe-S alloy which was coexisting with CaO-AlO1.5-CeO1.5 slag. As the result, oxygen potential in the steel was considerably decreased by the strong reducing agent Ce, and the S concentration was found to be reduced to less than 10 ppm. In order to quantitatively evaluate the desulfurization effect of this slag, the sulfide capacity (CS2-) at 1873 K was measured. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Process Technology, Pyrometallurgy |