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An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes
Includes abstract.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Centre for Bioprocess Engineering Research
2014
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| _version_ | 1867613189339873281 |
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| access_status_str | Open Access |
| author | Jera, Melody Kudzai |
| author2 | Franzidis, Jean-Paul |
| author_browse | Franzidis, Jean-Paul Jera, Melody Kudzai |
| author_facet | Franzidis, Jean-Paul Jera, Melody Kudzai |
| author_sort | Jera, Melody Kudzai |
| collection | Thesis |
| description | Includes abstract. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5311 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:11.035Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Centre for Bioprocess Engineering Research |
| publisherStr | Centre for Bioprocess Engineering Research |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/5311 An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes Jera, Melody Kudzai Franzidis, Jean-Paul Harrison, STL Bioprocess Engineering Includes abstract. Includes bibliographical references. Acidic drainage as a result of mining and mineral processing activities is a growing concern. The effects of Acid Rock Drainage (ARD) include environmental pollution in the affected areas and beyond. As South Africa has water challenges, the potential threat of continual depletion of useable water resources through their contamination by ARD and other mining activities may affect economic productivity, as well as quality of life. Currently used ARD remediation measures are variable and costly, not only in South Africa but worldwide. End of pipe approaches such as treatment by neutralisation fail to reduce the risk of ARD generation and provide long term solutions. Further it fails to address the limited resource utilisation of the byproduct materials, currently disposed of as ARD forming wastes. The Department of Chemical Engineering, at UCT, has focused research onto the prevention of ARD generation and minimisation of waste. One approach proposed is the two stage froth flotation process for separating sulphides, responsible for ARD formation, from the remaining tailings, leaving these benign with respect to ARD. Testwork results have proven its technical feasibility using porphyry copper tailings, fine coal and more recently gold tailings. Historically, ultrafine coal was not treated by most collieries in South Africa, but disposed as waste. Oxidation of the pyrite in the coal leads to generation of acidic water. In this project, an economic analysis of the coal two stage flotation process for the mitigation of ARD formation is considered. This project proposes ARD prevention by desulphurisation of sulphide rich waste coal material as an in-process approach which can be incorporated into mineral process flowsheets or as an add-on process for desulphurisation of old workings. The two stage flotation may yield a valuable mineral or coal product, as well as a low volume sulphide rich fraction which can be processed further to yield sulphuric acid or disposed of with containment and a benign tailings fraction which can be used as cover material or disposed conventionally. 2014-07-31T11:09:13Z 2014-07-31T11:09:13Z 2013 Master Thesis Masters MScEng http://hdl.handle.net/11427/5311 eng application/pdf Centre for Bioprocess Engineering Research Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Bioprocess Engineering Jera, Melody Kudzai An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| thesis_degree_str | Master's |
| title | An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| title_full | An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| title_fullStr | An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| title_full_unstemmed | An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| title_short | An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes |
| title_sort | economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage ard and an economic review of capping covers and ard treatment processes |
| topic | Bioprocess Engineering |
| url | http://hdl.handle.net/11427/5311 |
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