Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutions

Naoki Hiroyoshi, Hajime Miki, Tsuyoshi Hirajima, Masami Tsunekawa

研究成果: Contribution to journalArticle査読

148 被引用数 (Scopus)

抄録

The effects of ferrous ions on chalcopyrite oxidation with ferric ions in 0.1 mol dm-3 sulfuric acid solutions were investigated by leaching experiments at 303 K in nitrogen. With high cupric ion concentrations, the chalcopyrite oxidation was enhanced by high concentrations of ferrous ions and copper extraction was mainly controlled by the concentration ratio of ferrous to ferric ions or the redox potential of solutions. Ferrous ions, however, suppressed the chalcopyrite oxidation when cupric ion concentrations were low. A reaction model, which involves chalcopyrite reduction to intermediate Cu2S by ferrous ions and oxidation of the Cu2S by ferric ions, was proposed to interpret the results.

本文言語英語
ページ(範囲)185-197
ページ数13
ジャーナルHydrometallurgy
60
3
DOI
出版ステータス出版済み - 5 2001

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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