Kinetics of chalcopyrite leaching in either ferric sulphate or cupric sulphate media in the presence of NaCl.

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dc.contributor.authorVeloso, Tácia Costa
dc.contributor.authorPeixoto, Johne Jesus Mol
dc.contributor.authorPereira, Márcio Salgado
dc.contributor.authorLeão, Versiane Albis
dc.date.accessioned2016-08-09T19:40:40Z
dc.date.available2016-08-09T19:40:40Z
dc.date.issued2016
dc.description.abstractThe shrinking core model (SCM) has been extensively applied in the kinetics analysis of particulate systems. This is because in its classical form it is one of the simplestmodels developed for fluid–solid reactions. However, it requires single-sized solid grains failing to describe the leaching kinetics for broad particle size distributions (PSDs). The current investigation successfully applied an extension of the SCM to the leaching of chalcopyrite with a broad PSD in a mixed chloride–sulphate solution. Such a medium was selected because there is renewed attention to leaching in mixed systems due to the increasing utilization of saline waters in both leaching and bioleaching of sulphide ores. Moreover, chloride is a catalyst of chalcopyrite leaching. Specifically, the effects of temperature (70 °C to 90 °C) and reagent (Fe3+, Cu2+ and Cl−) concentrations on the leaching kinetics were determined. The results showed that chalcopyrite leaching was faster with Cu2+ (larger rate constant) than with Fe3+, but the activation energy was similar in both cases with 66.6 kJ/mol for 0.5 mol/L of Cu2+ and 66.8 kJ/mol with 1.0 mol/L Fe3+.pt_BR
dc.identifier.citationVELOSO, T. C. et al. Kinetics of chalcopyrite leaching in either ferric sulphate or cupric sulphate media in the presence of NaCl. International Journal of Mineral Processing, v. 148, p. 147-154, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S030175161630014X>. Acesso em: 11 jul. 2016.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.minpro.2016.01.014
dc.identifier.issn0301-7516
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/6770
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseO periódico International Journal of Mineral Processing concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3914200113639.pt_BR
dc.subjectChalcopyritept_BR
dc.subjectChloride leachingpt_BR
dc.subjectActivation energypt_BR
dc.subjectShrinking core modelpt_BR
dc.subjectParticle size distributionpt_BR
dc.titleKinetics of chalcopyrite leaching in either ferric sulphate or cupric sulphate media in the presence of NaCl.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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