The salt extraction process - A novel route for metal extraction Part 2 - Cu/Fe extraction from copper oxide and sulphides
2010 (English)In: Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, ISSN 0371-9553, ISSN 0371-9553, Vol. 119, no 2, 93-100 p.Article in journal (Refereed) Published
The present work is Part 2 of a novel salt extraction process towards the extraction of metal values from slag, low grade ores, etc. The authors describe the extraction of copper/iron from CuO, Cu 2S and CuFeS 2, which provides a green process route to treat the copper ore including both oxides and sulphides. The dissolution properties were investigated with respect to process parameters such as weight ratio of flux/copper ore and temperature. The highest extraction ratio is found at 92% in dissolution of Cu 2S, and residue of salt melt was confirmed to be mainly Al 2O 3. A cell voltage between 1·6 and 2·2 V is introduced for electrolysis, and the cathode products are proved to be pure Cu for electrolysis of CuO/Cu 2S, and Cu/Fe mixture for CuFeS 2 by X-ray diffraction and scanning electron microscopy/energy dispersive spectroscopy analysis. Some sulphur and iron chloride were found to volatilise and were deposited in the low temperature zone. Yield of copper has been estimated to be 52·3% during electrolysis of Cu 2S.
Place, publisher, year, edition, pages
2010. Vol. 119, no 2, 93-100 p.
Copper oxide, Copper sulphides, Electrolysis, Molten salts
IdentifiersURN: urn:nbn:se:kth:diva-14116DOI: 10.1179/174328510X498116ScopusID: 2-s2.0-77953804744OAI: oai:DiVA.org:kth-14116DiVA: diva2:329901
QC 201007142010-07-142010-07-142014-04-11Bibliographically approved