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Phase Equilibria Studies in the System ZnO-“FeO”-Al2O3-CaO-SiO2 Relevant to Imperial Smelting Furnace Slags: Part I

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Abstract

The phase equilibria and liquidus temperatures in the system ZnO-“FeO”-Al2O3-CaO-SiO2 in equilibrium with metallic iron have been determined experimentally in the temperature range of 1423 K to 1553 K. The experimental conditions were focused on the composition range relevant to Imperial Smelting Furnace slags. The results are presented in the form of a pseudo-ternary section ZnO-“FeO”-(CaO + SiO2 + Al2O3) in which CaO/SiO2 = 0.93 and (CaO + SiO2)/Al2O3 = 7.0. It was found that wustite and spinel are the major primary phases and that zincite and melilite are also present in the composition range investigated. Wustite (Fe2+,Zn)O and spinel (Fe2+,Zn)O (A1,Fe3+)2O3 solid solutions are formed in this system, and the ZnO concentration in the spinel phase is found to be much greater than in the liquid phase.

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Acknowledgments

The authors wish to thank the Australian Research Council (ARC-SPIRT scheme), ISP Ltd., Britannia Zinc Ltd., Enivisorse SA, Pasminco Sulphide, Rio Tinto Technical Services, MHD GmbH, Metaleurop, and Hachinohe Smelting Co. Ltd. for providing the financial support to enable this research to be carried out and providing scholarship support. Ms. Xinrui Zhang, who provided general laboratory assistance and undertook much of the careful sample preparation and measurement work. Mr. Ron Rasch of the Centre for Microscopy and Microanalysis at the University of Queensland, who provided technical support for the EPMA facilities.

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Authors and Affiliations

  1. PYROSEARCH, Pyrometallurgy Research Centre, School of Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia

    Baojun Zhao (Senior Research Fellow), Peter C. Hayes (Professor) & Evgueni Jak (Professor)

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  1. Baojun Zhao
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  2. Peter C. Hayes
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  3. Evgueni Jak
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Correspondence to Baojun Zhao.

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Manuscript submitted September 18, 2009.

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Zhao, B., Hayes, P.C. & Jak, E. Phase Equilibria Studies in the System ZnO-“FeO”-Al2O3-CaO-SiO2 Relevant to Imperial Smelting Furnace Slags: Part I. Metall Mater Trans B 41, 374–385 (2010). https://doi.org/10.1007/s11663-010-9342-z

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