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Phase Equilibria Studies of the Cu-Fe-O-Si System in Equilibrium with Air and with Metallic Copper

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Abstract

Phase equilibria of the Cu-Fe-O-Si system have been investigated in equilibrium: (1) with air atmosphere at temperatures between 1373 K and 1673 K (1100 °C and 1400 °C) and (2) with metallic copper at temperatures between 1373 K and 1573 K (1100 °C and 1300 °C). High-temperature equilibration/quenching/electron-probe X-ray microanalysis (EPMA) techniques have been used to accurately determine the compositions of the phases in equilibrium in the system. The new experimental results are presented in the form of “Cu2O”-“Fe2O3”-SiO2 ternary sections. The relationships between the activity of CuO0.5(l) and the composition of slag in equilibrium with metallic copper are discussed. The phase equilibria information of the Cu-Fe-O-Si system is of practical importance for industrial copper production processes and for the improvement of the existing thermodynamic database of copper-containing slag systems.

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Acknowledgments

The authors thank Australian Research Council Linkage program, Rio Tinto Kennecott Utah Copper, Corp., Xstrata Technology, Xstrata Copper, BHP Billiton Olympic Dam Operation, and Outotec Oy for the financial support for this research. The authors also thank the University of Queensland Research Scholarship (UQRS) and Endeavour International Postgraduate Research Scholarship (IPRS) programs for providing scholarships for T. Hidayat.

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Authors and Affiliations

  1. Pyrometallurgy Research Centre (PYROSEARCH), The University of Queensland, Brisbane, QLD, 4072, Australia

    Taufiq Hidayat (Postgraduate Student), Hector M. Henao (Senior Research Fellow), Peter C. Hayes (Xstrata Professor) & Evgueni Jak (Professor)

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  1. Taufiq Hidayat
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  2. Hector M. Henao
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  3. Peter C. Hayes
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  4. Evgueni Jak
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Correspondence to Taufiq Hidayat.

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Manuscript submitted March 15, 2012.

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Hidayat, T., Henao, H.M., Hayes, P.C. et al. Phase Equilibria Studies of the Cu-Fe-O-Si System in Equilibrium with Air and with Metallic Copper. Metall Mater Trans B 43, 1034–1045 (2012). https://doi.org/10.1007/s11663-012-9683-x

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  • DOI: https://doi.org/10.1007/s11663-012-9683-x

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