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Investigation of the surface properties of gangue minerals in PGM bearing ores
Bibliography: leaves 90-95.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Chemical Engineering
2015
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| _version_ | 1867613312395509760 |
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| access_status_str | Open Access |
| author | Martinovic, Jasmina |
| author2 | Bradshaw, Dee |
| author_browse | Bradshaw, Dee Martinovic, Jasmina |
| author_facet | Bradshaw, Dee Martinovic, Jasmina |
| author_sort | Martinovic, Jasmina |
| collection | Thesis |
| description | Bibliography: leaves 90-95. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/11617 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:08.683Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Chemical Engineering |
| publisherStr | Department of Chemical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/11617 Investigation of the surface properties of gangue minerals in PGM bearing ores Martinovic, Jasmina Bradshaw, Dee Harris, Peter Laskowski, Janusz Engineering Bibliography: leaves 90-95. 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. 2015-01-06T18:53:26Z 2015-01-06T18:53:26Z 2005 Master Thesis Masters MSc http://hdl.handle.net/11427/11617 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Engineering Martinovic, Jasmina Investigation of the surface properties of gangue minerals in PGM bearing ores |
| thesis_degree_str | Master's |
| title | Investigation of the surface properties of gangue minerals in PGM bearing ores |
| title_full | Investigation of the surface properties of gangue minerals in PGM bearing ores |
| title_fullStr | Investigation of the surface properties of gangue minerals in PGM bearing ores |
| title_full_unstemmed | Investigation of the surface properties of gangue minerals in PGM bearing ores |
| title_short | Investigation of the surface properties of gangue minerals in PGM bearing ores |
| title_sort | investigation of the surface properties of gangue minerals in pgm bearing ores |
| topic | Engineering |
| url | http://hdl.handle.net/11427/11617 |
| work_keys_str_mv | AT martinovicjasmina investigationofthesurfacepropertiesofganguemineralsinpgmbearingores |