Galvanic enhancement for high pressure leaching of chalcopyrite
This study was conducted to evaluate the galvanic enhancement of the pressure oxidation (POX) leaching of a chalcopyrite/chalcocite concentrate, which is believed to take place via a redox reaction. Cu recoveries of >90% could be achieved during POX leaching of this chalcopyrite/chalcoci...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2016-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600022K.pdf |
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| author | Kim D.H. Kim W.J. Kim H.S. Han K.S. Tran T. Kim M.J. |
| author_facet | Kim D.H. Kim W.J. Kim H.S. Han K.S. Tran T. Kim M.J. |
| author_sort | Kim D.H. |
| collection | DOAJ |
| description | This study was conducted to evaluate the galvanic enhancement of the pressure
oxidation (POX) leaching of a chalcopyrite/chalcocite concentrate, which is
believed to take place via a redox reaction. Cu recoveries of >90% could be
achieved during POX leaching of this chalcopyrite/chalcocite concentrate at
200°C and 0.7 MPa initial oxygen pressure within 2h in a pressure reactor
lined with titanium, which were 18-28% higher than for the same leaching
using the teflon liner. A slow heating time seems to produce more sulphur
coating, reducing the leaching performance, yielding much lower Cu recovery
when the teflon lining was used, although this does not greatly affect the
other case when the reactor was lined with titanium. The introduction of an
electronic conductor, in this case the titanium surface, is believed to
enhance this redox process, in which the oxidation of copper minerals and
sulphur to sulphate at the anodic sites (mineral surface) encountered during
POX leaching takes place simultaneously with the reversible
oxidation/reduction of the Fe2+/Fe3+couple and oxygen reduction on titanium. |
| format | Article |
| id | doaj-art-98b27845bd544a4385ec134a6cf1166d |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-98b27845bd544a4385ec134a6cf1166d2025-02-03T01:22:51ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752016-01-0152211912610.2298/JMMB150723022K1450-53391600022KGalvanic enhancement for high pressure leaching of chalcopyriteKim D.H.0Kim W.J.1Kim H.S.2Han K.S.3Tran T.4Kim M.J.5Chonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaChonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaChonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaChonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaChonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaChonnam National University, Department of Energy & Resources Engineering, Gwangju, South KoreaThis study was conducted to evaluate the galvanic enhancement of the pressure oxidation (POX) leaching of a chalcopyrite/chalcocite concentrate, which is believed to take place via a redox reaction. Cu recoveries of >90% could be achieved during POX leaching of this chalcopyrite/chalcocite concentrate at 200°C and 0.7 MPa initial oxygen pressure within 2h in a pressure reactor lined with titanium, which were 18-28% higher than for the same leaching using the teflon liner. A slow heating time seems to produce more sulphur coating, reducing the leaching performance, yielding much lower Cu recovery when the teflon lining was used, although this does not greatly affect the other case when the reactor was lined with titanium. The introduction of an electronic conductor, in this case the titanium surface, is believed to enhance this redox process, in which the oxidation of copper minerals and sulphur to sulphate at the anodic sites (mineral surface) encountered during POX leaching takes place simultaneously with the reversible oxidation/reduction of the Fe2+/Fe3+couple and oxygen reduction on titanium.http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600022K.pdfpressure oxidationchalcopyritegalvanicredox reactions |
| spellingShingle | Kim D.H. Kim W.J. Kim H.S. Han K.S. Tran T. Kim M.J. Galvanic enhancement for high pressure leaching of chalcopyrite Journal of Mining and Metallurgy. Section B: Metallurgy pressure oxidation chalcopyrite galvanic redox reactions |
| title | Galvanic enhancement for high pressure leaching of chalcopyrite |
| title_full | Galvanic enhancement for high pressure leaching of chalcopyrite |
| title_fullStr | Galvanic enhancement for high pressure leaching of chalcopyrite |
| title_full_unstemmed | Galvanic enhancement for high pressure leaching of chalcopyrite |
| title_short | Galvanic enhancement for high pressure leaching of chalcopyrite |
| title_sort | galvanic enhancement for high pressure leaching of chalcopyrite |
| topic | pressure oxidation chalcopyrite galvanic redox reactions |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600022K.pdf |
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