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Mössbauer Studies of Chalcopyrite
Journal of the Physical Society of Japan, 1968Mossbauer spectra of naturally occurring mineral chalcopyrite have been studied over a temperature range 300°–448°K. The spectra showed a typical pattern of six absorption lines due to the internal magnetic field. The Q.S. have values which are independent of temperature whereas the magnitudes of the internal magnetic field are 325{±}10, 312{±}10 and ...
Deo Raj, K. Chandra, S. P. Puri
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2010
The anodic dissolution of chalcopyrite has been examined in chloride and sulphate solutions from 20°C to 175°C. In chloride the yield of elemental sulphur is nearly 100%, whereas in sulphate solutions it is 75% or less, the remainder being oxidized. It is postulated that in sulphate solutions the copper dissolves as a thiosulphate complex, which can ...
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The anodic dissolution of chalcopyrite has been examined in chloride and sulphate solutions from 20°C to 175°C. In chloride the yield of elemental sulphur is nearly 100%, whereas in sulphate solutions it is 75% or less, the remainder being oxidized. It is postulated that in sulphate solutions the copper dissolves as a thiosulphate complex, which can ...
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Semiconductors with Chalcopyrite Structure
Nature, 1956IT was recently reported1 that certain compounds crystallizing with a triply substituted diamond lattice of the chalcopyrite type are semiconductors. We would report here optically determined energy gaps for a further four such compounds. These, together with the previously reported values for copper indium selenide and copper iron sulphide, are shown ...
I. G. AUSTIN +2 more
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The electroleaching of bornite and chalcopyrite
Hydrometallurgy, 1980Abstract The electroleaching reactions of bornite and chalcopyrite have been investigated by a study of the anode-potential/time relationships and examination of the products by electron microprobe analysis and X-ray diffraction, with particular reference to current and energy efficiencies. The effects of solution composition, temperature and current
D.C. Price, J.P. Chilton
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Chloride leaching for chalcopyrite
2009Two new process flowsheets have been developed which combine chloride leaching for chalcopyrite with solvent extraction, to selectively transfer copper to a conventional sulfate electrowinning circuit. Both models were designed to address the common chloride hydromet problem of product impurity, and they differ with respect to iron deportment. Chloride
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2001
The current focus of research in the UCT Minerals Bioprocessing Research Unit is to develop an understanding of the chalcopyrite bioleaching sub-processes. This thesis forms part of the greater study on bioleaching, investigating the ferric leaching subprocess. The objective of this thesis was two-folds.
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The current focus of research in the UCT Minerals Bioprocessing Research Unit is to develop an understanding of the chalcopyrite bioleaching sub-processes. This thesis forms part of the greater study on bioleaching, investigating the ferric leaching subprocess. The objective of this thesis was two-folds.
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