塩化物系I価銅浴からのCu電析における不純物の共析挙動 Codeposition Behavior of Impurities in Copper Electrowinning from Cuprous Chloride Solution

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The codeposition behavior of impurities such as Ag, Bi, Fe, Ni, Pb and Sb with Cu was investigated galvanostatically at 5-3000A/m<SUP>2</SUP> using Pt cathode at 60 °C in acidic copper ( I ) chloride (cuprous chloride) solution of pH1-2 containing 1.0 mol/L of Cu<SUP>+</SUP> and 4.9 mol/L of Cl<SUP>-</SUP>. The impurities were classified into two groups ; group I (Ag, Bi) which codeposits with Cu as metal ; group II (Fe, Ni, Pb, Sb) which is slightly involved in deposited Cu as nonmetal from electrolyte. Ag and Bi of group I behaved as more noble metal than Cu, which showed the typical feature of regular type codeposition. When Cu deposited dendritically, the content of Ag and Bi in deposit increased with increased duration of electrolysis by decreasing net current density due to increased cathode area. The current efficiency for Cu deposition in impurity-free solution was 95-100% over 100-1000A/m<SUP>2</SUP> and abruptly decreased above 1000 A/m<SUP>2</SUP> when the limiting current density of Cu was attained. Although Fe, Ni, Pb and Sb of group II were involved by 0.01-0.02mass% in deposit, they had no influence on the current efficiency and morphology of Cu.

収録刊行物

  • Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan 123(1), 33-38, 2007-01-25

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10018749156
  • NII書誌ID(NCID)
    AA12188381
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18816118
  • NDL 記事登録ID
    8729109
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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