Abstract
New experimental measurements have been made to determine liquidus isotherms, univariant and invariant equilibria in the FeO-Fe2O3-CaO-SiO2, CaO-SiO2 and FeO-Fe2O3-SiO2 systems in air at temperatures between 1190 °C and 1730 °C. The study was undertaken using equilibration/quenching and microanalysis techniques, enabling the compositions of the liquid and solid phases in equilibrium at temperature to be accurately measured. The data have been used to define liquidus in the primary phase fields of hematite (Fe2O3), spinel [(Fe,Ca)O·Fe2O3], lime (CaO), tridymite or cristobalite (SiO2), dicalcium ferrite (2CaO·Fe2O3, C2F), pseudo-wollastonite (CaO·SiO2, CS), rankinite (3CaO·2SiO2, C3S2), dicalcium silicate (2CaO·SiO2, C2S), tricalcium silicate (3CaO·SiO2, C3S) and the two liquids miscibility gap. These data obtained in the present study provide a more complete and more accurate description of the multi-component Fe-Ca-Si-O-Al-Mg-Cu-S system directly relevant to applications in the cement, the ferrous and non-ferrous metallurgical industries.
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Acknowledgments
The authors would like to acknowledge the Australian Research Council Linkage Program and Altonorte Glencore, Atlantic Copper, Aurubis, Olympic Dam Operation BHP Billiton, Kazzinc Glencore, PASAR Glencore, Outotec Oy (Espoo), Anglo American Platinum, Umicore, and Kennecott Rio Tinto for financial support to enable this research to be carried out, and the Centre for Microscopy and Microanalysis, at the University of Queensland for providing electron microscope facilities and the scientific and technical assistance, and to Mr. Michael Booth, Mr. Kade Parascos, Ms. Marina Chernishova and Ms. Suping Huang for assistance in experimental work.
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Manuscript submitted July 21, 2020; accepted March 24, 2021.
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Cheng, S., Shevchenko, M., Hayes, P.C. et al. Experimental Phase Equilibria Studies in the FeO-Fe2O3-CaO-SiO2 System and the Subsystems CaO-SiO2, FeO-Fe2O3-SiO2 in Air. Metall Mater Trans B 52, 1891–1914 (2021). https://doi.org/10.1007/s11663-021-02159-w
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DOI: https://doi.org/10.1007/s11663-021-02159-w