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Process flowsheet development for recovering antimony from Sb-bearing copper concentrates
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0002-5874-5473
Boliden Mineral AB.
Boliden Mineral AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2013 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 49, p. 45-53Article in journal (Refereed) Published
Abstract [en]

The technical feasibility, on laboratory scale, of hydro- and electrometallurgical processes of recovering metallic antimony from an antimony-bearing copper sulphide concentrate has been investigated. The influence of Na2S concentration, temperature and solid concentration was studied during the leaching test while the effect of current density, Na2S concentration, electrolyte temperature and NaOH concentration on antimony electrowinning from alkaline sulphide solutions was investigated. The leaching results showed that antimony dissolution is strongly dependent on the concentration of the leaching reagent as well as the leaching temperature. The antimony content in the concentrate was reduced from 1.7% to less than 0.1% Sb which is desirable for copper metallurgy. Cathode current efficiency is one of the important parameters to evaluate the performance of an electrolytic process. It is revealed in this study that current efficiency of antimony deposition from sulphide electrolytes is highly dependent on the concentration of sodium hydroxide and the current density used. The results illustrate that the combined effect of increasing anode current density (which was 10 times higher than the cathode current density) and NaOH concentration enhanced the current efficiency of the electrolytic process. It was demonstrated that excess free sulphide ions impacts the current efficiency of the process detrimentally. An integrated hydro-/electrometallurgical process flowsheet for antimony removal and recovery from a sulphide copper concentrate was developed.

Place, publisher, year, edition, pages
2013. Vol. 49, p. 45-53
Keywords [en]
Chemical engineering - Metallurgical process and manufacturing engineering
Keywords [sv]
Kemiteknik - Metallurgisk process- och produktionsteknik
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-3642DOI: 10.1016/j.mineng.2013.04.026ISI: 000322289500007Scopus ID: 2-s2.0-84878447670Local ID: 175544a6-f4b0-4450-a45d-b6072fcfa9f2OAI: oai:DiVA.org:ltu-3642DiVA, id: diva2:976500
Note
Validerad; 2013; 20130316 (samawe)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Awe, Samuel AyowoleSandström, Åke

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