Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid
dc.contributor.author | Hidalgo, T. | |
dc.contributor.author | Kuhar, L. | |
dc.contributor.author | Beinlich, Andreas | |
dc.contributor.author | Putnis, Andrew | |
dc.date.accessioned | 2018-06-29T12:26:20Z | |
dc.date.available | 2018-06-29T12:26:20Z | |
dc.date.created | 2018-06-29T12:08:59Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Hidalgo, T. and Kuhar, L. and Beinlich, A. and Putnis, A. 2018. Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid. Minerals Engineering. 125: pp. 66-74. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/68602 | |
dc.identifier.doi | 10.1016/j.mineng.2018.05.025 | |
dc.description.abstract |
© 2018 The suitability of methanesulfonic acid as a copper lixiviant with ferric chloride as an oxidant was studied by analysing the leaching kinetics and by characterising solid residues from leach tests on a chalcopyrite-rich ore sample. The effects of temperature, initial acidity, ferric-ion concentration and particle size were determined. The leach kinetics were dependent on the temperature and particle size, whereas the acid and ferric concentrations had a minimal impact on the leaching rate within the ranges studied. Although a sulfur layer formed on the solid residue, the reaction mechanism could be modeled with the shrinking-core model with surface chemical-reaction control, which implies that lixiviant flow through the sulfur layer did not control the reaction rate. The apparent activation energy was 101 kJ mol-1as calculated by the Arrhenius and 'time-to-a-given-fraction' methods. The activation parameters of the reaction were an enthalpy (?H++) of 99.4 kJ mol-1, and an entropy (?S++) of -197 J mol-1K-1as calculated by using transition state theory and the Eyring equation. | |
dc.publisher | Elsevier | |
dc.title | Kinetic study of chalcopyrite dissolution with iron(III) chloride in methanesulfonic acid | |
dc.type | Journal Article | |
dcterms.source.volume | 125 | |
dcterms.source.startPage | 66 | |
dcterms.source.endPage | 74 | |
dcterms.source.issn | 0892-6875 | |
dcterms.source.title | Minerals Engineering | |
curtin.department | The Institute for Geoscience Research (TIGeR) | |
curtin.accessStatus | Fulltext not available |
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