Journal article
Oxidation of chalcopyrite by extended milling
International Journal of Mineral Processing, Vol.77(4), pp.208-216
2005
Abstract
Chalcopyrite has been milled for up to 50 h in oxygen, air and argon atmospheres using a laboratory ball mill. No phase changes were evident in argon but the XRD peaks were weaker and broader indicating crystalline refinement. In oxygen, even after 1 h milling peaks for CuSO4•5H2O were present and these became predominant after 20 h milling where the chalcopyrite peaks were absent. In air, partial oxidation to CuSO 4•5H2O was evident after 50 h. Leaching of the resultant powders with water showed 80% dissolution after 50 h milling in oxygen, significantly greater than the 20% and 6% dissolution after milling for 50 h in air and argon respectively. Solution analyses showed the Cu/Fe ratio increased with milling time in oxygen suggesting selectivity may be possible. The insoluble residue was found to consist of haematite, elemental sulphur and unreacted chalcopyrite.
Details
- Title
- Oxidation of chalcopyrite by extended milling
- Authors/Creators
- C.J. Agnew (Author/Creator) - Murdoch UniversityN.J. Welham (Author/Creator) - Murdoch University
- Publication Details
- International Journal of Mineral Processing, Vol.77(4), pp.208-216
- Publisher
- Elsevier B.V.
- Identifiers
- 991005544601607891
- Copyright
- © 2005 Elsevier B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 7 Engineering & Materials Science
- 7.229 Mineral & Metal Processing
- 7.229.774 Bioleaching
- Web Of Science research areas
- Engineering, Chemical
- Mineralogy
- Mining & Mineral Processing
- ESI research areas
- Geosciences