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Flotation selectivity of novel alkyl dicarboxylate reagents for apatite-calcite 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, Mineralteknik och metallurgi.ORCID-id: 0000-0001-9153-6262
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.
Chalmers University of Technology, Chalmers University of Technology, Department of Chemical and Biological Engineering.
Vise andre og tillknytning
2015 (engelsk)Inngår i: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 445, s. 40-47Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The investigation aims to demonstrate the conceptual thoughts behind developing mineral specific reagents for use in flotation of calcium containing ores. For this purpose, a series of dicarboxylate-based surfactants with varying distance between the carboxylate groups (one, two or three methylene groups) was synthesized. A surfactant with the same alkyl chain length but with only one carboxylate group was also synthesized and evaluated. The adsorption behavior of these new reagents on pure apatite and pure calcite surfaces was studied using Hallimond tube flotation, FTIR and ζ potential measurements. The relation between the adsorption behavior of a given surfactant at a specific mineral surface and its molecular structure over a range of concentrations and pH values, as well as the region of maximum recovery, was 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. For example, out of the four compounds synthesized, only the one where the carboxylate groups were separated by a single methylene group floated apatite but not calcite, whereas calcite was efficiently floated with the monocarboxylic reagent, but not with the other reagents synthesized. This selective adsorption of a given surfactant to a particular mineral surface relative to other mineral surfaces as evidenced in the flotation studies was substantiated by ζ potential and infra-red spectroscopy data

sted, utgiver, år, opplag, sider
2015. Vol. 445, s. 40-47
HSV kategori
Forskningsprogram
Mineralteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-10025DOI: 10.1016/j.jcis.2014.11.072ISI: 000350006700006PubMedID: 25596367Scopus ID: 2-s2.0-84921051820Lokal ID: 8c78bb41-0a29-4bee-b260-10091965f006OAI: oai:DiVA.org:ltu-10025DiVA, id: diva2:982965
Merknad

Validerad; 2015; Nivå 2; 20141205 (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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