Interfacial properties of natural magnetite particles compared with their synthetic analogue
2011 (English)In: 5th International Flotation Conference 2011: (Flotation '11) ; Cape Town, South Africa, 14 - 17 November 2011, Red Hook: Curran Associates, Inc., 2011Conference paper (Refereed)
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 assilicate or polyacrylate.
Place, publisher, year, edition, pages
Red Hook: Curran Associates, Inc., 2011.
Research subject Chemical Technology; Applied Geology; Chemistry of Interfaces
IdentifiersURN: urn:nbn:se:ltu:diva-30624Local ID: 47de2460-8af3-427a-97b9-bae24813b51aISBN: 978-1-618-39395-1OAI: oai:DiVA.org:ltu-30624DiVA: diva2:1003853
International Flotation Conference : 14/11/2011 - 17/11/2011
Godkänd; 2011; 20130315 (andbra)2016-09-302016-09-30Bibliographically approved