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Experimental Investigation of Gas/Slag/Matte/Tridymite Equilibria in the Cu-Fe-O-S-Si-Al-Ca-Mg System in Controlled Gas Atmosphere: Experimental Results at 1473 K (1200 °C), 1573 K (1300 °C) and p(SO2) = 0.25 atm

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Abstract

The effect of temperature, CaO, MgO and Al2O3 on important technological copper smelting parameters, such as the chemically dissolved copper in slag and the composition of the liquid phase in equilibrium with tridymite, are experimentally characterised as a function of copper concentration in matte. Two series of experiments for the gas/slag/matte/tridymite equilibria in the Cu-Fe-O-S-Si system at p(SO2) = 0.25 atm have been carried out. The effect of CaO at 1573 K (1300 °C), and the combined effect of Al2O3 + CaO + MgO at 1473 K (1200 °C) and 1573 K (1300 °C) have been measured in the first and second series of experiments respectively. The experimental methodology involves high temperature equilibration of samples on a substrate made from the primary phase under controlled gas atmosphere (CO/CO2/SO2/Ar), followed by rapid quenching of the equilibrium condensed phases and direct measurement of the phase compositions using the Electron Probe x-ray Microanalysis. The resulting data are used in the optimization of the thermodynamic database for the copper-containing systems.

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Acknowledgments

The authors would like to thank Australian Research Council Linkage program LP 140100480, 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 the financial and technical support for this study. The authors would like to thank the Centre for Microscopy and Microanalysis, University of Queensland for technical support.

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Authors and Affiliations

  1. Pyrometallurgy Innovation Centre (PYROSEARCH), School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4068, Australia

    Svetlana Sineva, Maksym Shevchenko, Denis Shishin, Peter C. Hayes & Evgueni Jak

  2. Aurubis AG, 20539, Hamburg, Germany

    Ata Fallah-Mehrjardi

  3. Bandung Institute of Technology, Bandung, 40132, Indonesia

    Taufiq Hidayat

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  1. Svetlana Sineva
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  2. Ata Fallah-Mehrjardi
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  4. Maksym Shevchenko
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  5. Denis Shishin
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Correspondence to Svetlana Sineva.

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Ata Fallah-Mehrjardi, Taufiq Hidayat: Formerly with PYROSEARCH.

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Sineva, S., Fallah-Mehrjardi, A., Hidayat, T. et al. Experimental Investigation of Gas/Slag/Matte/Tridymite Equilibria in the Cu-Fe-O-S-Si-Al-Ca-Mg System in Controlled Gas Atmosphere: Experimental Results at 1473 K (1200 °C), 1573 K (1300 °C) and p(SO2) = 0.25 atm. J. Phase Equilib. Diffus. 41, 243–256 (2020). https://doi.org/10.1007/s11669-020-00810-8

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