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Flotation selectivity of novel alkyl dicarboxylate reagents for calcite-fluorite separation
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
Department of Chemical and Biological Engineering, Chalmers University of Technology.
Department of Chemical and Biological Engineering, Chalmers University of Technology.
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Number of Authors: 52016 (English)In: Tenside Surfactants Detergents, ISSN 0932-3414, E-ISSN 2195-8564, Vol. 53, no 6, p. 516-523Article in journal (Refereed) Published
Abstract [en]

A series of amino acid-based surfactants with a fixed alkyl chain length and with two carboxyl groups separated by a spacer of one, two or three carbon atoms have been synthesized and evaluated as potential collectors for flotation of calcite and fluorite. A monocarboxylate amino acid-based surfactant having the same length of the hydrocarbon tail was also included in the study. Experiments using a Hallimond flotation tube showed that although the flotation reagents solely differs in terms of spacer, their efficacy in terms of flotation recovery varied very much. Whereas on calcite at pH 10.5 only the monocarboxylate collector gave a high yield, on fluorite at the same pH both the monocarboxylate and the dicarboxylate collectors with one carbon between the carboxyl groups gave good results. On calcite at the natural pH the monocarboxylate collector was most efficient but the dicarboxylate collectors with a two- and a three-carbon spacer also gave a reasonable recovery. On fluorite at the natural pH the dicarboxylate collectors with a two- and a three-carbon spacer were most efficient. The potential and the flotation recovery of the mineral particles as afunction of added collector was assessed and the adsorption was also monitored by diffuse reflectance infra-red spectroscopy. Taken together, the results showed that small changes in the head group region of the collector can radically affect flotation recovery. This type of knowledge is important to understand flotation selectivity in a mixture of similar minerals.

Place, publisher, year, edition, pages
2016. Vol. 53, no 6, p. 516-523
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing; Future mining (AERI)
Identifiers
URN: urn:nbn:se:ltu:diva-7761DOI: 10.3139/113.110471ISI: 000388868300001Scopus ID: 2-s2.0-84997683955Local ID: 62cb80ee-2701-4146-bbac-57a22fff99faOAI: oai:DiVA.org:ltu-7761DiVA, id: diva2:980651
Note

Validerad; 2017; Nivå 2; 2016-12-19 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
In thesis
1. Selectivity in Calcium mineral flotation - An analysis of novel an existing approaches
Open this publication in new window or tab >>Selectivity in Calcium mineral flotation - An analysis of novel an existing approaches
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Selektivitet vid flotation av Kalciummineral - En analys av nya och existerande tillvägagångssätt
Place, publisher, year, edition, pages
Luleå University of Technology, 2017
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Froth flotation, Mineral processing, Adsorption, Mineral specific reagents, surfactant
National Category
Mineral and Mine Engineering
Research subject
Mineral Processing
Identifiers
urn:nbn:se:ltu:diva-63132 (URN)978-91-7583-914-1 (ISBN)978-91-7583-915-8 (ISBN)
Public defence
2017-06-20, F531, 14:11 (English)
Opponent
Supervisors
Available from: 2017-05-16 Created: 2017-05-16 Last updated: 2018-03-01Bibliographically approved

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Karlkvist, TommyPatra, AnuttamRao, Hanumantha

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