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

Naoki Hiroyoshi, Hajime Miki, Tsuyoshi Hirajima, Masami Tsunekawa

Research output: Contribution to journalArticle

139 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)185-197
Number of pages13
JournalHydrometallurgy
Volume60
Issue number3
DOIs
Publication statusPublished - May 1 2001

Fingerprint

chalcopyrite
Leaching
leaching
Ions
sulfate
ion
oxidation
Oxidation
ferric sulfate
Sulfates
redox potential
Sulfuric acid
sulfuric acid
Copper
Nitrogen
copper
nitrogen

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutions. / Hiroyoshi, Naoki; Miki, Hajime; Hirajima, Tsuyoshi; Tsunekawa, Masami.

In: Hydrometallurgy, Vol. 60, No. 3, 01.05.2001, p. 185-197.

Research output: Contribution to journalArticle

Hiroyoshi, Naoki ; Miki, Hajime ; Hirajima, Tsuyoshi ; Tsunekawa, Masami. / Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutions. In: Hydrometallurgy. 2001 ; Vol. 60, No. 3. pp. 185-197.
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