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Oxidation rates of liquid copper and liquid copper sulfide

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Abstract

The kinetics of oxidation of liquid copper and copper sulfide were determined when the rate was controlled by the diffusion of the oxidizing gas to the melt interface. The method incorporated a capillary tube sample holder and the flux rate was measured by a quartz spring and cathetometer. The sample of copper sulfide was suspended from the balance in a tube furnace through which was passed a mixture of oxygen and argon gas. The oxidation of molten copper sulfide was found to proceed by the formation of copper followed by the formation of copper oxide. From the results, the diffusion coefficients of SO2 and O2 in argon were calculated over a temperature range of 1150° to 1350°C. The data compare well with the empirical equations for the diffusion of these gases. At lower temperatures, a different oxidation behavior is observed due to solidification of the sample.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, Univeristy of Toronto, Toronto, Ontario, Canada

    F. Ajersch (Graduate Student) & J. M. Toguri (Professor)

Authors
  1. F. Ajersch
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  2. J. M. Toguri
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Ajersch, F., Toguri, J.M. Oxidation rates of liquid copper and liquid copper sulfide. Metall Trans 3, 2187–2193 (1972). https://doi.org/10.1007/BF02643231

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  • DOI: https://doi.org/10.1007/BF02643231

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