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Flotation selectivity of novel alkyl dicarboxylate reagents for calcite-fluorite separation
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0002-7524-7767
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.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.
Vise andre og tillknytning
Rekke forfattare: 52016 (engelsk)Inngår i: Tenside Surfactants Detergents, ISSN 0932-3414, E-ISSN 2195-8564, Vol. 53, nr 6, s. 516-523Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2016. Vol. 53, nr 6, s. 516-523
HSV kategori
Forskningsprogram
Mineralteknik; Framtidens gruvor (FOI)
Identifikatorer
URN: urn:nbn:se:ltu:diva-7761DOI: 10.3139/113.110471ISI: 000388868300001Scopus ID: 2-s2.0-84997683955Lokal ID: 62cb80ee-2701-4146-bbac-57a22fff99faOAI: oai:DiVA.org:ltu-7761DiVA, id: diva2:980651
Merknad

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

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert
Inngår i avhandling
1. Selectivity in Calcium mineral flotation - An analysis of novel an existing approaches
Åpne denne publikasjonen i ny fane eller vindu >>Selectivity in Calcium mineral flotation - An analysis of novel an existing approaches
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Alternativ tittel[sv]
Selektivitet vid flotation av Kalciummineral - En analys av nya och existerande tillvägagångssätt
sted, utgiver, år, opplag, sider
Luleå University of Technology, 2017
Serie
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Emneord
Froth flotation, Mineral processing, Adsorption, Mineral specific reagents, surfactant
HSV kategori
Forskningsprogram
Mineralteknik
Identifikatorer
urn:nbn:se:ltu:diva-63132 (URN)978-91-7583-914-1 (ISBN)978-91-7583-915-8 (ISBN)
Disputas
2017-06-20, F531, 14:11 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2017-05-16 Laget: 2017-05-16 Sist oppdatert: 2018-03-01bibliografisk kontrollert

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