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Tellurium distribution in copper anode slimes smelting

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Abstract

Tellurium is a common minor constituent of copper anode slimes. The distribution of tellurium between the phases during slimes smelting is an important consideration, both in terms of metal quality and the capture of the oxidized tellurium. In this work, the oxidation by oxygen at 1100 °C of a silver-copper selenide matte containing 2 pct tellurium has been examined. The distribution of tellurium between the phases was determined as the extent of oxidation increased, and the system was modeled using a computational thermodynamics package. Oxidized tellurium was found to report to the slag, with none being removed with the gas. The thermodynamic model predicted, to an acceptable level, the tellurium content of all phases as oxidation progressed. It was used to show that oxidation by air rather than oxygen results in higher residual tellurium levels in silver metal and that the lower the smelting temperature, the greater the extent of tellurium elimination from silver to the slag.

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Authors and Affiliations

  1. the Department of Chemical and Metallurgical Engineering, Royal Melbourne Institute of Technology, 3001, Melbourne, Victoria, Australia

    D. R. Swinbourne (Discipline Leader) & G. G. Barbante (Research Fellow)

  2. Group Technical Services, Pasminco Metals, 2284, Boolaroo, New South Wales, Australia

    A. Sheeran (Process Engineer)

Authors
  1. D. R. Swinbourne
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  2. G. G. Barbante
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  3. A. Sheeran
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Swinbourne, D.R., Barbante, G.G. & Sheeran, A. Tellurium distribution in copper anode slimes smelting. Metall Mater Trans B 29, 555–562 (1998). https://doi.org/10.1007/s11663-998-0089-8

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  • DOI: https://doi.org/10.1007/s11663-998-0089-8

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