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Thermodynamic modeling of lead distribution among matte, slag, and liquid copper

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Abstract

Recently, a thermodynamic database was developed for the calculation of equilibria involved in the production of copper. The present study is concerned with the further development of the thermodynamic models and the database of model parameters for the matte, slag, and blister copper phases with a view to including Pb in the database and permitting calculations in the seven-component system Pb-Cu-Ca-Fe-Si-O-S. Thermodynamic and phase equilibrium data available in the literature are reviewed, critically assessed, and optimized with the modified quasi-chemical model. When used with the Gibbs energy minimization software and other databases of the FACT thermodynamic computing system, the database developed in the present study can be used for the calculation of matte-slag-copper-gas phase equilibria during copper smelting and converting.

The distribution of lead among these phases can be computed. For example, the distribution of lead among matte, silica-saturated slag, and copper has been calculated at metal saturation, or under fixed partial pressure of SO2, and has been compared with the available experimental data. The Pb distributions among the equilibrium phases have been calculated under various conditions, which are difficult to study experimentally, such as at magnetite saturation or under various oxygen partial pressures and iron to silica ratios in the slag.

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Authors and Affiliations

  1. CRCT, Ecole Polytechnique de Montreal, H3C 3A7, Montreal, PQ, Canada

    Sergei A. Degterov (Senior Research Associate)

  2. Department of Metallurgy and Materials Science, Ecole Polytechnique de Montreal, H3C 3A7, Montreal, PQ, Canada

    Arthur D. Pelton (Professor)

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  1. Sergei A. Degterov
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  2. Arthur D. Pelton
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Degterov, S.A., Pelton, A.D. Thermodynamic modeling of lead distribution among matte, slag, and liquid copper. Metall Mater Trans B 30, 1033–1044 (1999). https://doi.org/10.1007/s11663-999-0109-3

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  • DOI: https://doi.org/10.1007/s11663-999-0109-3

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