Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching

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dc.contributor.authorGhorbani, Yousef
dc.contributor.authorBecker, Megan
dc.contributor.authorPetersen, J
dc.contributor.authorFranzidis, Jean-Paul
dc.date.accessioned2015-04-29T11:15:28Z
dc.date.available2015-04-29T11:15:28Z
dc.date.issued2013-10
dc.description.abstractAlthough heap leaching is by now well established in the mining industry, the process remains limited by low recoveries with different rate-limiting factors that are not clearly understood. In this study, three large particle size classes (+19/-25, +9.5/-16, +4.75/-5 mm) were prepared from a sphalerite ore by two different methods of comminution (HPGR and cone crusher). The particles were then packed into leach reactors that were operated continuously for eleven months with well-mixed internal circulation of the leach solution. Characterization of the residue of the leach reactors indicated that there are areas within the ore particles where although sphalerite grains are accessible to the solution, they remain unreacted. X-ray tomography and QEMSCANĀ® analysis of the selected samples before, during and after leaching, showed increased leaching of sphalerite grains associated with pyrite due to galvanic interactions. Mineral chemistry (Fe, Mn content of sphalerite) and jarosite precipitation were also investigated as factors influencing sphalerite leaching.en_ZA
dc.identifier.apacitationGhorbani, Y., Becker, M., Petersen, J., & Franzidis, J. (2013). Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching. <i>Minerals Engineering</i>, http://hdl.handle.net/11427/12702en_ZA
dc.identifier.chicagocitationGhorbani, Yousef, Megan Becker, J Petersen, and Jean-Paul Franzidis "Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching." <i>Minerals Engineering</i> (2013) http://hdl.handle.net/11427/12702en_ZA
dc.identifier.citationGhorbani,Y; Becker, M; Petersen, J; Franzidis, J-P. (2013). Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching. Minerals Engineering, 52:38ā€“51. http://dx.doi.org/10.1016/j.mineng.2013.03.006en_ZA
dc.identifier.issn08926875en_ZA
dc.identifier.ris TY - Journal Article AU - Ghorbani, Yousef AU - Becker, Megan AU - Petersen, J AU - Franzidis, Jean-Paul AB - Although heap leaching is by now well established in the mining industry, the process remains limited by low recoveries with different rate-limiting factors that are not clearly understood. In this study, three large particle size classes (+19/-25, +9.5/-16, +4.75/-5 mm) were prepared from a sphalerite ore by two different methods of comminution (HPGR and cone crusher). The particles were then packed into leach reactors that were operated continuously for eleven months with well-mixed internal circulation of the leach solution. Characterization of the residue of the leach reactors indicated that there are areas within the ore particles where although sphalerite grains are accessible to the solution, they remain unreacted. X-ray tomography and QEMSCANĀ® analysis of the selected samples before, during and after leaching, showed increased leaching of sphalerite grains associated with pyrite due to galvanic interactions. Mineral chemistry (Fe, Mn content of sphalerite) and jarosite precipitation were also investigated as factors influencing sphalerite leaching. DA - 2013-10 DB - OpenUCT DO - 10.1016/j.mineng.2013.03.006 DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2013 SM - 08926875 T1 - Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching TI - Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching UR - http://hdl.handle.net/11427/12702 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/12702
dc.identifier.urihttp://dx.doi.org/10.1016/j.mineng.2013.03.006
dc.identifier.vancouvercitationGhorbani Y, Becker M, Petersen J, Franzidis J. Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching. Minerals Engineering. 2013; http://hdl.handle.net/11427/12702.en_ZA
dc.languageengen_ZA
dc.publisherElsevieren_ZA
dc.publisher.departmentCentre for Bioprocess Engineering Research
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_ZA
dc.sourceMinerals Engineeringen_ZA
dc.source.urihttp://www.journals.elsevier.com/minerals-engineering/
dc.titleInvestigation of the effect of mineralogy as rate-limiting factors in large particle leachingen_ZA
dc.typeJournal Articleen_ZA
uct.subject.keywordsmineral compositionen_ZA
uct.subject.keywordssphaleriteen_ZA
uct.subject.keywordsX-ray tomographyen_ZA
uct.subject.keywordsmineral associationen_ZA
uct.subject.keywordsheap leachingen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourcePost-printen_ZA
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