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Influence of alumina on mineralogy and environmental properties of zinc-copper smelting slags
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0003-1511-8020
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2013 (English)In: International Journal of Minerals, Metallurgy and Materials, ISSN 1674-4799, E-ISSN 1869-103X, Vol. 20, no 3, p. 234-245Article in journal (Refereed) Published
Abstract [en]

An iron-silicate slag, from a zinc-copper smelting process, and mixtures of this slag with 5, 10 and 15 wt-% alumina addition were re-melted, semi-rapidly solidified and characterized using scanning electron microscopy equipped with energy dispersive spectroscopy, and X-ray diffraction. The FactSageTM6.2 thermodynamic package was applied to compare the stable phases at equilibrium conditions with experimental characterization. A standard European leaching test was also carried out for all samples to investigate the changes in leaching behaviour due to addition of alumina. Results show that the commonly reported phases for slags from copper and zinc production processes (olivine, pyroxene and spinel) are the major constituents of the current samples. A correlation can be seen between mineralogical characteristics and leaching behaviours. The sample with 10 wt-% alumina addition, which contains high amounts of spinels and lower amounts of the other soluble phases, shows the lowest leachabilities for most of the elements.

Place, publisher, year, edition, pages
2013. Vol. 20, no 3, p. 234-245
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-11310DOI: 10.1007/s12613-013-0718-3ISI: 000315945400003Scopus ID: 2-s2.0-84877818533Local ID: a406c9c8-4d1f-4843-a258-0728511ae55bOAI: oai:DiVA.org:ltu-11310DiVA, id: diva2:984260
Note
Validerad; 2013; 20120312 (sinmos)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Mostaghel, SinaSamuelsson, CaisaBjörkman, Bo

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