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- Title
Phase Equilibria of Ti-bearing Electric Furnace Slags in the CaO-MgO-SiO<sub>2</sub>-13%Al<sub>2</sub>O<sub>3</sub>-50%TiO<sub>2</sub> System.
- Authors
Jing, Jianfa; Wang, Shuai; Guo, Yufeng; Li, Guang; Chen, Feng; Yang, Lingzhi
- Abstract
With the purpose of providing a fundamental understanding of equilibrium phase relationships in the CaO-MgO-SiO2-13%Al2O3-50%TiO2 system, the equilibrium phase relationships were experimentally determined from 1400°C to 1500°C in air using a high-temperature equilibration and quenching method. The single liquid phase, liquid-rutile (TiO2), liquid-anosovite (M3O5), liquid phase coexisting with anosovite and rutile, liquid phase coexisting with anosovite and spinel, liquid-spinel, liquid phase coexisting with perovskite and spinel, and liquid-perovskite (CaTiO3) were found. The realistic isotherms at 1400°C, 1450°C, and 1500°C were obtained by comparing the experimental liquid phase results with the predicted results. A realistic phase boundary was confirmed based on the actual isotherm's cusp orientation, ensuring accuracy and precision. The minimum deviations, which are 146.71°C, 123.26°C, and 170.05°C, respectively, were lower than the experimentally determined liquidus temperatures. In addition, the results of phase equilibrium experiments showed that, when the MgO content exceeded 5%, the corresponding liquid phase temperature increased with the increase of MgO content. This work is a further addition and refinement to the thermodynamics of titanium oxides.
- Subjects
ELECTRIC furnaces; PHASE equilibrium; TITANIUM oxides; LIQUIDUS temperature; SLAG
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 12, p5160
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06078-w