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Reaction mechanism in a copper flash smelting furnace

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Abstract

Oxygen pressures in the Toyo copper flash smelting shaft have been measured by means of the following galvanic cell: Fe, FeO/ZrO2 + MgO/O in molten particles. The measured oxygen pressures were normalized to 1523 K with respect to the reaction 4FeO(l) + O2(g) = 4FeO1.5(1). The normalized oxygen pressure and gas composition profiles along the vertical direction from the reaction shaft roof to the settler showed the following reaction mechanism. (1) Most of the oxygen contained in reaction air is consumed in the upper zone of the reaction shaft by sup-plemental fuel and some easily combustible copper concentrate particles which become oxidized excessively; and (2) the excessively oxidized concentrate particles, which may contain metallic copper, are reduced by contact with the remainder of the concentrate particles while they fall through the reaction shaft.

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Authors and Affiliations

  1. Niihama Research Laboratories, Saijo, Ehime, Japan

    N. Kemori (Leader of P.R.C.)

  2. Sumitomo Metal Mining Co., Saijo, Ehime, Japan

    H. Kurokawa (Assistant Manager of the Smelting Section, Toyo Smelter)

  3. CSIRO Division of Mineral and Process Engineering, 3168, Clayton, Victoria, Australia

    W. T. Denholm (Chief Research Scientist)

Authors
  1. N. Kemori
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  2. W. T. Denholm
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  3. H. Kurokawa
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Kemori, N., Denholm, W.T. & Kurokawa, H. Reaction mechanism in a copper flash smelting furnace. Metall Trans B 20, 327–336 (1989). https://doi.org/10.1007/BF02696985

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