Ferrous promoted chalcopyrite leaching

Naoki Hiroyoshi, Hajime Miki, Tsuyoshi Hirajima, Masami Tsunekawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


It is generally accepted that ferric ions are effective for leaching chalcopyrite as an oxidant and ferrous ions contribute to the leaching only as a source of the oxidant ferric ions. However, this paper shows that ferrous ions are more useful for leaching chalcopyrite than oxidant ferric ions in sulfuric acid solutions in air at ambient temperatures. Leaching experiments and dissolved oxygen consumption measurements were carried out with a very pure chalcopyrite and 0.001 - 1 mol dm-3 sulfuric acid solutions containing 0 - 0.1 mol dm-3 ferric or ferrous ions at 303 K. Chalcopyrite oxidation with dissolved oxygen was promoted by ferrous ions but suppressed by ferric ions. As a result, the amount of extracted copper was larger with ferrous ions than with ferric ions. Effects of Thiobacillus ferrooxidans on the ferrous promoted chalcopyrite leaching were also investigated and discussed based on the experimental data.

Original languageEnglish
Title of host publication4th International Conference COPPER 99-COBRE 99
EditorsS.K. Young, D.B. Dreisinger, R.P. Hackl, D.G. Dixon, S.K. Young, D.B. Dreisinger, R.P. Hackl, D.G. Dixon
Number of pages16
Publication statusPublished - Dec 1 1999
EventFourth International Conference COPPER 99 - COBRE 99 - Phoenix, AZ, United States
Duration: Oct 10 1999Oct 13 1999

Publication series

Name4th International Conference COPPER 99-COBRE 99


OtherFourth International Conference COPPER 99 - COBRE 99
Country/TerritoryUnited States
CityPhoenix, AZ

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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