Investigation of the surface properties of gangue minerals in PGM bearing ores

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dc.contributor.advisorBradshaw, Deeen_ZA
dc.contributor.advisorHarris, Peteren_ZA
dc.contributor.advisorLaskowski, Januszen_ZA
dc.contributor.authorMartinovic, Jasminaen_ZA
dc.date.accessioned2015-01-06T18:53:26Z
dc.date.available2015-01-06T18:53:26Z
dc.date.issued2005en_ZA
dc.descriptionBibliography: leaves 90-95.en_ZA
dc.description.abstractThe recovery of Platinum Group Minerals (PGM) and associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc. Although talc is present in small quantities it has a disproportionate effect on concentrate grade by enhancing froth stability and increasing the entrainment of other gangue minerals. However, there is an indication that some of the other gangue minerals, which are normally considered to be hydrophilic, such as chromite and pyroxene, report to the concentrate as floatable particles. Polysaccharide depressants, such as carboxymethyl cellulose (CMC) and modified guar gums are used to reduce the floatability of naturally floatable gangue and may also be able to reduce the floatability of activated gangue. This study examines the copper activation of a range of minerals found in the Bushveld Complex (namely pyroxene, feldspar, chromite and talc as well as the classical oxide, quartz) using zeta potential measurements, adsorption and microflotation tests. The effect on floatability is evaluated after activation and collector adsorption in the presence of a modified guar and a CMC depressant. Although quartz is not a major gangue component in PGM ores it was selected since it is a strongly negatively-charged mineral in the alkaline range and therefore likely to respond to copper activation. Steenberg and Harris, (1984) found that polymers such as guar and CMC did not appear to adsorb to a significant level on quartz.en_ZA
dc.identifier.apacitationMartinovic, J. (2005). <i>Investigation of the surface properties of gangue minerals in PGM bearing ores</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/11617en_ZA
dc.identifier.chicagocitationMartinovic, Jasmina. <i>"Investigation of the surface properties of gangue minerals in PGM bearing ores."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2005. http://hdl.handle.net/11427/11617en_ZA
dc.identifier.citationMartinovic, J. 2005. Investigation of the surface properties of gangue minerals in PGM bearing ores. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Martinovic, Jasmina AB - The recovery of Platinum Group Minerals (PGM) and associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc. Although talc is present in small quantities it has a disproportionate effect on concentrate grade by enhancing froth stability and increasing the entrainment of other gangue minerals. However, there is an indication that some of the other gangue minerals, which are normally considered to be hydrophilic, such as chromite and pyroxene, report to the concentrate as floatable particles. Polysaccharide depressants, such as carboxymethyl cellulose (CMC) and modified guar gums are used to reduce the floatability of naturally floatable gangue and may also be able to reduce the floatability of activated gangue. This study examines the copper activation of a range of minerals found in the Bushveld Complex (namely pyroxene, feldspar, chromite and talc as well as the classical oxide, quartz) using zeta potential measurements, adsorption and microflotation tests. The effect on floatability is evaluated after activation and collector adsorption in the presence of a modified guar and a CMC depressant. Although quartz is not a major gangue component in PGM ores it was selected since it is a strongly negatively-charged mineral in the alkaline range and therefore likely to respond to copper activation. Steenberg and Harris, (1984) found that polymers such as guar and CMC did not appear to adsorb to a significant level on quartz. DA - 2005 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Investigation of the surface properties of gangue minerals in PGM bearing ores TI - Investigation of the surface properties of gangue minerals in PGM bearing ores UR - http://hdl.handle.net/11427/11617 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/11617
dc.identifier.vancouvercitationMartinovic J. Investigation of the surface properties of gangue minerals in PGM bearing ores. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2005 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/11617en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherEngineeringen_ZA
dc.titleInvestigation of the surface properties of gangue minerals in PGM bearing oresen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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