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Phase Equilibria of Ti-Bearing Electric Furnace Slags in Air at 1400 °C in CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 System

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Abstract

Phase equilibria for the CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 system were experimentally investigated at 1400 °C in air atmosphere, employing the high-temperature equilibration and quenching method. Seven distinct phases were identified, encompassing a liquid phase, a liquid phase with perovskite (CaTiO3), a liquid phase with rutile (TiO2), a liquid phase with anosovite (M3O5), a liquid phase with anosovite and rutile, a liquid phase with anosovite and spinel, and a liquid phase with perovskite and spinel. Additionally, an experimentally verified isotherm at 1400 °C was obtained and conducted a comparative analysis with predictions generated using FactSage software. Overall, the FactSage 8.1 software exhibited a notable tendency to overestimated the liquidus temperatures in the M3O5 and spinel phases regions when compared to the experimentally determined values. This disparity may be attributed to limitations in the FactSage 8.1 software database which lack of Al2TiO5 in the “FToxid-PSEU” solution species, as it indicated a large liquid phase region in the CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 system at 1400 °C than what we experimentally determined.

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Acknowledgments

The financial supports from National Natural Science Foundation of China on the project 52104345.

Competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, P.R. China

    Jian-Fa **g, Shuai Wang, Yu-Feng Guo, Feng Chen & Ling-Zhi Yang

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  2. Shuai Wang
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  3. Yu-Feng Guo
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Contributions

Jianfa **g: Investigation, writing—original draft. Yufeng Guo: Supervision. Shuai Wang: Conceptualization, review and editing. Feng Chen: Review and editing. Lingzhi Yang: Review and editing.

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Correspondence to Shuai Wang.

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**g, JF., Wang, S., Guo, YF. et al. Phase Equilibria of Ti-Bearing Electric Furnace Slags in Air at 1400 °C in CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 System. Metall Mater Trans B (2024). https://doi.org/10.1007/s11663-024-03161-8

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