Thermophilic Heap Leaching of a Chalcopyrite Concentrate
| dc.contributor.author | Petersen, J | |
| dc.contributor.author | Dixon, D G | |
| dc.date.accessioned | 2016-08-25T12:00:12Z | |
| dc.date.available | 2016-08-25T12:00:12Z | |
| dc.date.issued | 2002 | |
| dc.date.updated | 2016-08-23T13:09:55Z | |
| dc.description.abstract | Thermophiles have been shown to be the only micro-organisms to leach chalcopyrite successfully. Heap leaching may be a feasible alternative to conventional bio-reactors, providing a high temperature environment can be maintained within the heap without external heating. In the present study thermophilic heap leaching of a chalcopyrite concentrate coated onto inert support rocks (the GEOCOAT™ process) was studied in sets of small heated columns. The temperature was gradually increased to 70 °C, while successively introducing various mesophile and thermophile cultures. Individual columns were dismantled after progressively longer leach periods and the residual concentrates analysed. Copper extractions in excess of 90% were achieved within 100 days. On the basis of head and residue analyses the rate of reaction heat generated was calculated. A comprehensive heap heat conservation model was used to determine whether the experimental temperatures can be achieved and maintained in a full scale heap. Results indicate that operating hot heaps successfully is possible within a certain range of process parameters. | en_ZA |
| dc.identifier | http://dx.doi.org/10.1016/S0892-6875(02)00092-4 | |
| dc.identifier.apacitation | Petersen, J., & Dixon, D. G. (2002). Thermophilic Heap Leaching of a Chalcopyrite Concentrate. <i>Minerals Engineering</i>, http://hdl.handle.net/11427/21551 | en_ZA |
| dc.identifier.chicagocitation | Petersen, J, and D G Dixon "Thermophilic Heap Leaching of a Chalcopyrite Concentrate." <i>Minerals Engineering</i> (2002) http://hdl.handle.net/11427/21551 | en_ZA |
| dc.identifier.citation | Petersen, J., & Dixon, D. G. (2002). Thermophilic heap leaching of a chalcopyrite concentrate. Minerals engineering, 15(11), 777-785. | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Petersen, J AU - Dixon, D G AB - Thermophiles have been shown to be the only micro-organisms to leach chalcopyrite successfully. Heap leaching may be a feasible alternative to conventional bio-reactors, providing a high temperature environment can be maintained within the heap without external heating. In the present study thermophilic heap leaching of a chalcopyrite concentrate coated onto inert support rocks (the GEOCOAT™ process) was studied in sets of small heated columns. The temperature was gradually increased to 70 °C, while successively introducing various mesophile and thermophile cultures. Individual columns were dismantled after progressively longer leach periods and the residual concentrates analysed. Copper extractions in excess of 90% were achieved within 100 days. On the basis of head and residue analyses the rate of reaction heat generated was calculated. A comprehensive heap heat conservation model was used to determine whether the experimental temperatures can be achieved and maintained in a full scale heap. Results indicate that operating hot heaps successfully is possible within a certain range of process parameters. DA - 2002 DB - OpenUCT DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - Thermophilic Heap Leaching of a Chalcopyrite Concentrate TI - Thermophilic Heap Leaching of a Chalcopyrite Concentrate UR - http://hdl.handle.net/11427/21551 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/21551 | |
| dc.identifier.vancouvercitation | Petersen J, Dixon DG. Thermophilic Heap Leaching of a Chalcopyrite Concentrate. Minerals Engineering. 2002; http://hdl.handle.net/11427/21551. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.rights | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | en_ZA |
| dc.source | Minerals Engineering | en_ZA |
| dc.source.uri | http://www.sciencedirect.com/science/journal/08926875 | |
| dc.subject.other | Bacteria | |
| dc.subject.other | Bio-oxidation | |
| dc.subject.other | Leaching | |
| dc.subject.other | Modelling | |
| dc.subject.other | Sulphide ores | |
| dc.title | Thermophilic Heap Leaching of a Chalcopyrite Concentrate | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |