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Melting of Gold-Containing Concentrates with Copper Production Lead Slags

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Metallurgist Aims and scope

Results are presented for a study of the pyrometallurgical treatment of gold-arsenic concentrates with lead osmium-rhenium-containing slags. Conditions are found for preparing alloy ingots consisting of lead, or predominantly of lead sulfide, or both phases. It is shown that with gravitation deposition up to 65–68% osmium is concentrated in 17–25% matte. Gold is almost uniformly distributed over the height of ingots. For industrial application of the results obtained, it is recommended that molten products are poured into a mold heated to 500–550°C, and after natural cooling the lower 25% of alloy is separated for osmium extraction, and gold is extracted from the rest of the alloy by well-known technology. Reduction kinetics are studied for gold, osmium, rhenium, and arsenic. According to kinetic curves, recovery of rhenium in slag proceeds rapidly; osmium recovery ceases in 20–25 min; gold is concentrated in the alloy in 10 min. arsenic is transferred into a gas phase in 10 min, and its concentration in alloy comprises 0.2% on average, and in slags 0.27–0.63%.

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Authors and Affiliations

  1. National Center for Complex Processing of Mineral Raw Materials of Kazakhstan Republic, Almaty, Kazakhstan

    E. A. Mazulevskii, T. V. Kovzalenko, B. Seitkhanov & O. P. Dobryakova

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  1. E. A. Mazulevskii
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  2. T. V. Kovzalenko
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  3. B. Seitkhanov
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  4. O. P. Dobryakova
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Correspondence to E. A. Mazulevskii.

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Translated from Metallurg, No. 11, pp. 77–83, November, 2017.

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Mazulevskii, E.A., Kovzalenko, T.V., Seitkhanov, B. et al. Melting of Gold-Containing Concentrates with Copper Production Lead Slags. Metallurgist 61, 1001–1008 (2018). https://doi.org/10.1007/s11015-018-0599-9

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  • DOI: https://doi.org/10.1007/s11015-018-0599-9

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