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Interfacial properties of natural magnetite particles compared with their synthetic analogue
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-6710-1066
Research Centre for Eco-Environmental Sciences, Chinese Academy of Science, Beijing 100085, China.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0002-4755-5754
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2012 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 36-38, no S1, p. 187-194Article in journal (Refereed) Published
Abstract [en]

Understanding of the interactions between iron oxides and flotation reagents is important both for flotation and agglomeration of iron ore. Model systems comprising synthetic iron oxides and pure chemical reagents are commonly applied in experimental work in order to obtain high quality data and to ease the interpretation of the empirical data. Whether the results obtained using model systems are valid for iron ore minerals and commercial reagents is a question seldom addressed in the literature. It is shown in this work that previously reported results obtained from a model system, concerning adsorption of a carboxylate surfactant and sodium metasilicate onto synthetic magnetite nanoparticles, as obtained by in situ ATR-FTIR spectroscopy and contact angle measurements, are applicable to adsorption of flotation reagents on magnetite concentrate. Additionally, the problem of restoring magnetite wetting after flotation is addressed since good wetting of a magnetite concentrate is required to produce iron ore pellets by wet agglomeration. The results from the present work indicate that the wettability of both synthetic magnetite coated with surfactant and magnetite concentrate after flotation can be improved by adsorbing a hydrophilizing agent such as silicate or polyacrylate.

Place, publisher, year, edition, pages
2012. Vol. 36-38, no S1, p. 187-194
National Category
Chemical Process Engineering Physical Chemistry
Research subject
Chemical Technology; Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-4833DOI: 10.1016/j.mineng.2012.03.030ISI: 000311773100026Scopus ID: 2-s2.0-84867745073Local ID: 2d28d52d-6bfd-4b9f-bfe7-c7cf376dc86bOAI: oai:DiVA.org:ltu-4833DiVA, id: diva2:977707
Note

Validerad; 2012; 20111214 (elipot)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2024-05-08Bibliographically approved

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Potapova, ElisavetaYang, XiaofangWesterstrand, MagnusGrahn, MattiasHolmgren, AllanHedlund, Jonas

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