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Phase composition of spinel melts obtained during flash smelting of the mineral chalcopyrite

  • Metallurgy of Non-Ferrous Metals
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Abstract

With the HSC Chemistry ver. 4.1 program software, the possibility of obtaining oxidic and spinel phases during the oxidation of chalcopyrite is evaluated and the equilibrium compositions of the oxidized product in the temperature range from 1000 to 1800 K are calculated. For qualitative and quantitative estimation of the phases presenting in the oxidized product, an experiment with chalcopyrite mineral (fraction <100 μm) in a laboratory furnace simulating the flash smelting process at the temperature 973 K has been carried out. The phases obtained after the oxidation of the sulfide particles are identified with the help of x-ray phase analysis. For qualitative and quantitative estimation, determination of the phases is undertaken: electron probe microanalysis (EPMA) and Mössbauer spectroscopy along with the applied chemical analysis. It is established that the contents of copper and iron oxides and spinel phases in the oxidized product are close to the equilibrium composition corresponding to the average combustion temperature of the sulfide particles.

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Authors and Affiliations

  1. Department of Non-Ferrous Metals And Semiconductor Technologies, University of Chemical Technology and Metallurgy, Sofia, Bulgaria

    V. Stefanova & Y. Trifonov

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  1. V. Stefanova
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  2. Y. Trifonov
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This article was submitted by the authors in English.

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Stefanova, V., Trifonov, Y. Phase composition of spinel melts obtained during flash smelting of the mineral chalcopyrite. Russ. J. Non-ferrous Metals 49, 148–155 (2008). https://doi.org/10.3103/S1067821208030048

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  • DOI: https://doi.org/10.3103/S1067821208030048

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