galvanic enhancement for high pressure leaching of chalcopyrite
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ID: 212626
2016
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Abstract
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.
| Reference Key |
d.h.2016journalgalvanic
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|---|---|
| Authors | ;Kim D.H.;Kim W.J.;Kim H.S.;Han K.S.;Tran T.;Kim M.J. |
| Journal | computational statistics |
| Year | 2016 |
| DOI |
10.2298/JMMB150723022K
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| URL | |
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