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Investigating collector and depressant performance in the flotation of selected iron ores
As the excessive extraction of high grade iron ore reserves has led to the rapid depletion of these ore bodies, there is a growing need to extract and upgrade low grade iron ores into more economically viable products with an iron content in excess of 50%. The beneficiation of low grade iron ores th...
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| Format: | Thesis |
| Language: | English |
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Centre for Minerals Research
2017
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| _version_ | 1867613301439987712 |
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| access_status_str | Open Access |
| author | Mhonde, Ngoni Pepukai |
| author2 | Wiese, Jenny |
| author_browse | Mhonde, Ngoni Pepukai Wiese, Jenny |
| author_facet | Wiese, Jenny Mhonde, Ngoni Pepukai |
| author_sort | Mhonde, Ngoni Pepukai |
| collection | Thesis |
| description | As the excessive extraction of high grade iron ore reserves has led to the rapid depletion of these ore bodies, there is a growing need to extract and upgrade low grade iron ores into more economically viable products with an iron content in excess of 50%. The beneficiation of low grade iron ores through the reverse cationic flotation procedure is gradually gaining popularity as a possible processing route of the future for South Africa's iron industry. Reverse cationic flotation employs a reagent suite consisting of an amine compound which functions as a quartz collector in addition to providing the frothing effect in the flotation system, and hydrolysed starch which serves to depress hematite during flotation. The aim of this project was to investigate the effect of using five amine collectors with different molecular structures on the flotation recovery of quartz and the entrainment of hematite in the flotation of a South African iron ore and a Brazilian iron ore. Laboratory batch flotation tests were conducted on both ore samples and the grade and recovery of hematite were recorded. The collectors were characterised through surface tension measurements and pKa value analysis. An attempt at using different polysaccharides as hematite depressants entailed the use of a CMC and a guar gum in batch flotation tests of the Brazilian iron ore. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/22742 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:57.504Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Centre for Minerals Research |
| publisherStr | Centre for Minerals Research |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/22742 Investigating collector and depressant performance in the flotation of selected iron ores Mhonde, Ngoni Pepukai Wiese, Jenny McFadzean, Belinda Chemical Engineering Minerals Research As the excessive extraction of high grade iron ore reserves has led to the rapid depletion of these ore bodies, there is a growing need to extract and upgrade low grade iron ores into more economically viable products with an iron content in excess of 50%. The beneficiation of low grade iron ores through the reverse cationic flotation procedure is gradually gaining popularity as a possible processing route of the future for South Africa's iron industry. Reverse cationic flotation employs a reagent suite consisting of an amine compound which functions as a quartz collector in addition to providing the frothing effect in the flotation system, and hydrolysed starch which serves to depress hematite during flotation. The aim of this project was to investigate the effect of using five amine collectors with different molecular structures on the flotation recovery of quartz and the entrainment of hematite in the flotation of a South African iron ore and a Brazilian iron ore. Laboratory batch flotation tests were conducted on both ore samples and the grade and recovery of hematite were recorded. The collectors were characterised through surface tension measurements and pKa value analysis. An attempt at using different polysaccharides as hematite depressants entailed the use of a CMC and a guar gum in batch flotation tests of the Brazilian iron ore. 2017-01-16T13:48:28Z 2017-01-16T13:48:28Z 2016 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/22742 eng application/pdf Centre for Minerals Research Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Chemical Engineering Minerals Research Mhonde, Ngoni Pepukai Investigating collector and depressant performance in the flotation of selected iron ores |
| thesis_degree_str | Master's |
| title | Investigating collector and depressant performance in the flotation of selected iron ores |
| title_full | Investigating collector and depressant performance in the flotation of selected iron ores |
| title_fullStr | Investigating collector and depressant performance in the flotation of selected iron ores |
| title_full_unstemmed | Investigating collector and depressant performance in the flotation of selected iron ores |
| title_short | Investigating collector and depressant performance in the flotation of selected iron ores |
| title_sort | investigating collector and depressant performance in the flotation of selected iron ores |
| topic | Chemical Engineering Minerals Research |
| url | http://hdl.handle.net/11427/22742 |
| work_keys_str_mv | AT mhondengonipepukai investigatingcollectoranddepressantperformanceintheflotationofselectedironores |