|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Thermodynamic Properties of Sulfur in the CaO–AlO1.5–CeO1.5 Slag System at 1873 K
||Masaya Higuchi, Kazuki Morita
|On-Site Speaker (Planned)
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.
||Iron and Steel, Process Technology, Pyrometallurgy