A novel sequential heap leach process for treating crushed Platreef ore

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dc.contributor.authorMwase, James M
dc.contributor.authorPetersen, Jochen
dc.contributor.authorEksteen, Jacques J
dc.date.accessioned2015-05-14T20:45:50Z
dc.date.available2015-05-14T20:45:50Z
dc.date.issued2014-01
dc.description.abstractA novel sequential heap leaching process has been identified as a possible alternative to the conventional concentrate-smelt-refine route for processing Platreef ore, a platinum group metals containing ore with palladium predominance. The present study focuses on testing this process on crushed whole ore, after initial experiments conducted on low-grade Platreef flotation concentrate achieved promising results. Two samples of drill core Platreef ore with size distributions of -25 mm +1 mm and -6 mm +1 mm were first bioleached in cylindrical columns, to simulate heap leaching, at 65°C and then leached with cyanide solution at 50°C in cylindrical columns. Overall the best results were achieved from the tests on the -6 mm +1 mm size fraction sample. After 304 days 93% Cu, 75% Ni and 53% Co were extracted in the bioleach experiment, and after 60 days 57.8% Pt, 99.7% Pd and 90.3% Au in the follow-up cyanide leach experiment. Analysis using a mineral liberation analyser suggested that Pt and Pd were leached mostly from the tellurides while the Pt arsenides appeared resistant to cyanide leaching. From the results it is proposed that the process considered herein is a potential alternative route to treat Platreef ore.en_ZA
dc.identifier.apacitationMwase, J. M., Petersen, J., & Eksteen, J. J. (2014). A novel sequential heap leach process for treating crushed Platreef ore. <i>Hydrometallurgy</i>, http://hdl.handle.net/11427/12808en_ZA
dc.identifier.chicagocitationMwase, James M, Jochen Petersen, and Jacques J Eksteen "A novel sequential heap leach process for treating crushed Platreef ore." <i>Hydrometallurgy</i> (2014) http://hdl.handle.net/11427/12808en_ZA
dc.identifier.citationMwase, J.M., Petersen, J. & Eksteen, J.J. (2014). A novel sequential heap leach process for treating crushed Platreef ore. Hydrometallurgy, 141: 97-104. http://dx.doi.org/10.1016/j.hydromet.2013.11.005en_ZA
dc.identifier.ris TY - Journal Article AU - Mwase, James M AU - Petersen, Jochen AU - Eksteen, Jacques J AB - A novel sequential heap leaching process has been identified as a possible alternative to the conventional concentrate-smelt-refine route for processing Platreef ore, a platinum group metals containing ore with palladium predominance. The present study focuses on testing this process on crushed whole ore, after initial experiments conducted on low-grade Platreef flotation concentrate achieved promising results. Two samples of drill core Platreef ore with size distributions of -25 mm +1 mm and -6 mm +1 mm were first bioleached in cylindrical columns, to simulate heap leaching, at 65°C and then leached with cyanide solution at 50°C in cylindrical columns. Overall the best results were achieved from the tests on the -6 mm +1 mm size fraction sample. After 304 days 93% Cu, 75% Ni and 53% Co were extracted in the bioleach experiment, and after 60 days 57.8% Pt, 99.7% Pd and 90.3% Au in the follow-up cyanide leach experiment. Analysis using a mineral liberation analyser suggested that Pt and Pd were leached mostly from the tellurides while the Pt arsenides appeared resistant to cyanide leaching. From the results it is proposed that the process considered herein is a potential alternative route to treat Platreef ore. DA - 2014-01 DB - OpenUCT DO - 10.1016/j.hydromet.2013.11.005 DP - University of Cape Town J1 - Hydrometallurgy LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - A novel sequential heap leach process for treating crushed Platreef ore TI - A novel sequential heap leach process for treating crushed Platreef ore UR - http://hdl.handle.net/11427/12808 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/12808
dc.identifier.urihttp://dx.doi.org/10.1016/j.hydromet.2013.11.005
dc.identifier.vancouvercitationMwase JM, Petersen J, Eksteen JJ. A novel sequential heap leach process for treating crushed Platreef ore. Hydrometallurgy. 2014; http://hdl.handle.net/11427/12808.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.rights© 2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en_ZA
dc.sourceHydrometallurgyen_ZA
dc.source.urihttp://www.journals.elsevier.com/hydrometallurgy/
dc.titleA novel sequential heap leach process for treating crushed Platreef oreen_ZA
dc.typeJournal Articleen_ZA
uct.subject.keywordsPlatinum group metalsen_ZA
uct.subject.keywordsheap leachingen_ZA
uct.subject.keywordsbioleachingen_ZA
uct.subject.keywordscyanideen_ZA
uct.subject.keywordsPlatreef oreen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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