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Design and development of novel mineral-specific collectors for flotation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0001-9153-6262
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-7524-7767
LKAB.
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2014 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Almost all of the flotation reagents used today were discovered by continued application of empirical methods and/or trial and error experimentation. Moreover, with the metal-ion specific approach used so far, it is difficult to separate the minerals containing the same constituent metal ion. A critical assessment of molecular recognition processes involved in biomineralization suggested the possibility of using reagents which are surface specific. The concept that the molecules consisting of two or more functional groups having appropriate spacing between those so as to achieve structural/stereochemical compatibility during interaction with the mineral surface exhibit structure-specificity is thought to be extended to the design of specific collectors in flotation processes. In the present study, for the first time, a rational design of surface active molecules, and thereby the recognition of crystal faces (of minerals) by these molecules through structural and stereochemical matching is being utilized successfully to selectively float various minerals. For this purpose, carboxylate-based collectors (for mineral specific flotation of calcium minerals) as well as xanthate-based collectors (for mineral specific flotation of sulphide minerals) with a fixed alkyl chain length but having two functional groups with varying geometrical distances (separated by a spacer of one, two and three carbon atoms) between them have been synthesized. In this article, we have discussed the design, synthesis, purification of these novel mineral specific collectors as well as their important solution parameters in relation to flotation processes.

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-32389Local ID: 6e1ec01b-f440-4b68-834f-f21ec913fd43OAI: oai:DiVA.org:ltu-32389DiVA, id: diva2:1005623
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
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
Keyword
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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