Large particle effects in chemical/biochemical heap leach processes – A review

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dc.contributor.authorGhorbani, Yousef
dc.contributor.authorBecker, Megan
dc.contributor.authorMainza, Aubrey
dc.contributor.authorFranzidis, Jean-Paul
dc.contributor.authorPetersen, Jochen
dc.date.accessioned2016-07-26T12:15:45Z
dc.date.available2016-07-26T12:15:45Z
dc.date.issued2011
dc.date.updated2016-07-26T12:14:42Z
dc.description.abstractThe application of heap leach technology to recovery of economically important metals, notably copper, gold, silver, and uranium, is wide-spread in the mining industry. Unique to heap leaching is the relatively coarse particle size, typically 12–25 mm top size for crushed and agglomerated ores and larger for run-ofmine dump leaching operations. Leaching from such large particles is commonly assumed to follow shrinking core type behaviour, although little evidence for the validity of this assumption exists. This review investigates the current state of knowledge with respect to the understanding of the characteristics and mineralogy of large particles and how these influence leaching in a heap context and the tools to characterize these. This includes the study of ore and particle properties, visualization techniques for ore characterization, the connection between comminution and leaching behaviour, as well as particle models within heap leach modelling. We contend that the economics of heap leaching are strongly governed by the trade-off between the slow rate and limited extent of leaching from large particles and the cost of crushing finer. A sound understanding of the underlying large particle effects will therefore greatly inform future technology choices in the area of heap leaching.en_ZA
dc.identifierhttp://dx.doi.org/10.1016/j.mineng.2011.04.002
dc.identifier.apacitationGhorbani, Y., Becker, M., Mainza, A., Franzidis, J., & Petersen, J. (2011). Large particle effects in chemical/biochemical heap leach processes – A review. <i>Minerals Engineering</i>, http://hdl.handle.net/11427/20771en_ZA
dc.identifier.chicagocitationGhorbani, Yousef, Megan Becker, Aubrey Mainza, Jean-Paul Franzidis, and Jochen Petersen "Large particle effects in chemical/biochemical heap leach processes – A review." <i>Minerals Engineering</i> (2011) http://hdl.handle.net/11427/20771en_ZA
dc.identifier.citationGhorbani, Y., Becker, M., Mainza, A., Franzidis, J. P., & Petersen, J. (2011). Large particle effects in chemical/biochemical heap leach processes–a review. Minerals Engineering, 24(11), 1172-1184.en_ZA
dc.identifier.issn0892-6875en_ZA
dc.identifier.ris TY - Journal Article AU - Ghorbani, Yousef AU - Becker, Megan AU - Mainza, Aubrey AU - Franzidis, Jean-Paul AU - Petersen, Jochen AB - The application of heap leach technology to recovery of economically important metals, notably copper, gold, silver, and uranium, is wide-spread in the mining industry. Unique to heap leaching is the relatively coarse particle size, typically 12–25 mm top size for crushed and agglomerated ores and larger for run-ofmine dump leaching operations. Leaching from such large particles is commonly assumed to follow shrinking core type behaviour, although little evidence for the validity of this assumption exists. This review investigates the current state of knowledge with respect to the understanding of the characteristics and mineralogy of large particles and how these influence leaching in a heap context and the tools to characterize these. This includes the study of ore and particle properties, visualization techniques for ore characterization, the connection between comminution and leaching behaviour, as well as particle models within heap leach modelling. We contend that the economics of heap leaching are strongly governed by the trade-off between the slow rate and limited extent of leaching from large particles and the cost of crushing finer. A sound understanding of the underlying large particle effects will therefore greatly inform future technology choices in the area of heap leaching. DA - 2011 DB - OpenUCT DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 SM - 0892-6875 T1 - Large particle effects in chemical/biochemical heap leach processes – A review TI - Large particle effects in chemical/biochemical heap leach processes – A review UR - http://hdl.handle.net/11427/20771 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20771
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0892687511001178
dc.identifier.vancouvercitationGhorbani Y, Becker M, Mainza A, Franzidis J, Petersen J. Large particle effects in chemical/biochemical heap leach processes – A review. Minerals Engineering. 2011; http://hdl.handle.net/11427/20771.en_ZA
dc.languageengen_ZA
dc.publisherElsevieren_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceMinerals Engineeringen_ZA
dc.source.urihttp://www.journals.elsevier.com/minerals-engineering/
dc.subject.otherParticles
dc.subject.otherHeap leaching
dc.subject.otherMineralogy
dc.subject.otherLeach modelling
dc.titleLarge particle effects in chemical/biochemical heap leach processes – A reviewen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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