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Molecular recognition in mineral flotation: Selectivity in apatite-calcite system
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-7524-7767
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0001-9153-6262
Chalmers University of Technology, Chalmers University of Technology, Department of Chemical and Biological Engineering.
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2014 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

The present investigation aims to develop and distinguish mineral specific reagents with two functional groups for use in flotation of calcium containing minerals. For this purpose, a series of dicarboxylate-based surfactants with varying length between the carboxylate groups (one, two or three methylene groups) were synthesized. As reference, a surfactant with the same alkyl chain length but with only one carboxylate group in the polar part was synthesized. The adsorption behavior of these new reagents on pure apatite and calcite mineral surfaces was studied using Hallimond tube flotation, FTIR and ζ potential measurements. The relation between the adsorption behavior of a given surfactant on a specific mineral surface and its molecular structure over a range of concentration and pH values, as well as the region of maximum recovery were established. It was found that one of the reagents, with a specific distance between the carboxylate groups, was much more selective for a particular mineral surface than the other homologues synthesized. This selective adsorption of a given surfactant to a particular mineral surface relative to other mineral surfaces as evidenced in flotation studies is substantiated by ζ potential and infra-red spectroscopy data.

Place, publisher, year, edition, pages
2014.
National Category
Physical Chemistry Metallurgy and Metallic Materials
Research subject
Chemistry of Interfaces; Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-34992Scopus ID: 84938844701Local ID: 9556eee6-e2b7-4c8d-81e9-ae4ad6be9cbcOAI: oai:DiVA.org:ltu-34992DiVA, id: diva2:1008244
Conference
International Mineral Processing Congress : 20/10/2014 - 24/10/2014
Note
Godkänd; 2014; 20150824 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-16Bibliographically approved

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Karlkvist, TommyPatra, AnuttamRao, HanumanthaFredriksson, Andreas

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