Global ETD Search
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Showing 1 to 8 of 8 for “"Copper ores"”.
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The role of collectors in the flotation of partially oxidised copper ores
… performance of partially oxidised and oxidised copper sulphide ores were investigated in this study. More specifically, the role of the functional groups of the collectors, their dosages and the effect of collector mixtures and their dosages were investigated. Batch flotation tests were used to …
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An investigation into the effects of preleach time period, nitrogen supplementation and iron concentration on bioleaching performance
… of valuable metals, particularly from low grade copper ores due to the ever increase in demand. A lag phase is present during the start-up phase of heap bioleach operations characterised by a low degree of microbial colonisation, a low ferrous iron oxidation rate and low microbial proliferation …
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Bioleaching of chalcopyrite
… mobility. Subsequently, a mechanism for copper dissolution was proposed by employing relevant experiments, including the chemical leaching of chalcopyrite by sulphuric acid and ferric sulphate solutions, bioleaching of chalcopyrite in the presence of added ferric ions, and cell attachment …
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Depletion, Technology and Productivity Growth in Metallic Minerals Industry
… spectrum of geological transitions in copper ores reveals that the continuous and incremental technological developments had successfully offset the detrimental effects of depletion on sector productivity, often aided by the geological characteristics that changed to the miners’ …
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An Investigation of Copper Recovery from a Sulphide-Oxide Ore with a Mixed Collector System
Current copper deposits contain significant amounts of secondary non-sulphide minerals and newly discovered deposits are increasingly complex. As a result, research into the improvement of sulphide-oxide copper ores processing through the use of mixed collector systems has surged. The flotation of …
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Characterising the acid mine drainage potential of fine coal wastes
… from high sulphide minerals such as gold and copper ores. This is exacerbated by the growing concern over water quality degradation in the Mpumalanga region of South Africa. The development of integrated solutions to address the management of coal-related AMD requires an understanding of the …