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Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli
Bibliography: pages 98-105.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Chemical Engineering
2016
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| _version_ | 1867613170869207040 |
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| access_status_str | Open Access |
| author | Fowler, Terry-Ann |
| author2 | Hansford, Geoffrey Spearing |
| author_browse | Fowler, Terry-Ann Hansford, Geoffrey Spearing |
| author_facet | Hansford, Geoffrey Spearing Fowler, Terry-Ann |
| author_sort | Fowler, Terry-Ann |
| collection | Thesis |
| description | Bibliography: pages 98-105. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/21699 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:53.390Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| 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:11427/21699 Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli Fowler, Terry-Ann Hansford, Geoffrey Spearing Chemical Engineering Bibliography: pages 98-105. The work presented in this dissertation is an investigation of-the ferric leaching of zinc from sphalerite. A further aspect of this study was an investigation of the influence of pyrite on the dissolution rate of sphalerite due to possible galvanic interactions. This study is one component of a larger study of the sub-processes involved in the bioleaching of sulphide minerals in which the ferric leaching of the sulphide mineral is assumed to be a chemical step with the bacteria oxidising ferrous iron to ferric iron and elemental sulphur, if formed, to sulphate. The literature showed that two types of model have been used to describe the ferric leaching of the sphalerite. The first type was a shrinking-particle model in which there action was described by first order kinetics or an electrochemical mechanism. The second type included a mass transfer resistance in terms of a shrinking-core model described by half-order kinetics or a decaying diffusion coefficient. All four of these models were tested for their ability to predict published data for the ferric leaching of sphalerite. It was found that the models fitted the data for the initial period of a leach up to conversions of about 50%. However, no one of the models was found to be successful in predicting the data for prolonged leaching to high conversions. 2016-09-06T14:45:41Z 2016-09-06T14:45:41Z 1996 Master Thesis Masters MSc http://hdl.handle.net/11427/21699 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Chemical Engineering Fowler, Terry-Ann Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| thesis_degree_str | Master's |
| title | Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| title_full | Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| title_fullStr | Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| title_full_unstemmed | Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| title_short | Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli |
| title_sort | kinetics of the ferric sulphate leaching of sphalerite and sphalerite pyrite mixtures a study of the chemical leaching of base metal minerals under conditions similar to that of bio leaching by thiobacilli |
| topic | Chemical Engineering |
| url | http://hdl.handle.net/11427/21699 |
| work_keys_str_mv | AT fowlerterryann kineticsoftheferricsulphateleachingofsphaleriteandsphaleritepyritemixturesastudyofthechemicalleachingofbasemetalmineralsunderconditionssimilartothatofbioleachingbythiobacilli |