Selective Flotation of Copper Concentrates Containing Arsenic Minerals Using Potassium Amyl Xanthate and Oxidation Treatment

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  • Suyantara Gde Pandhe Wisnu
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University Kyushu University Institute for Asian and Oceanian Studies, Kyushu University
  • Miki Hajime
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • Hirajima Tsuyoshi
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University Sumitomo Metal Mining Co., Ltd.
  • Sasaki Keiko
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University Kyushu University Institute for Asian and Oceanian Studies, Kyushu University
  • Ochi Daishi
    Sumitomo Metal Mining Co., Ltd.
  • Aoki Yuji
    Sumitomo Metal Mining Co., Ltd.

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<p>This study investigated the effects of potassium amyl xanthate (KAX) and oxidation treatment using hydrogen peroxide (H2O2) on the selective flotation of copper concentrates containing arsenic-bearing copper minerals. The mineralogical analysis revealed that enargite and chalcopyrite were the main arsenic-bearing copper and copper sulfide minerals, respectively, in the copper concentrate. KAX treatment at pH 9 improved the recoveries of copper sulfide and arsenic-bearing copper minerals. However, arsenic-bearing copper minerals floated more rapidly than copper sulfide minerals, indicating better separation selectivity. The separation selectivity of the KAX treatment was significantly improved at pH 10. H2O2 treatment was found to selectively improve the recovery of arsenic-bearing copper minerals. A combination treatment using 0.1 M H2O2 and 60 g/t of KAX at pH 9 enhanced the separation selectivity in the selective flotation of copper sulfide and arsenic-bearing copper minerals by producing a copper concentrate with the lowest arsenic grade and highest copper grade in tailings compared to those obtained from separated KAX and H2O2 treatments.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 65 (1), 27-36, 2024-01-01

    The Japan Institute of Metals and Materials

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