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Sökning: onr:"swepub:oai:research.chalmers.se:9e74e4aa-0d70-4b07-b84a-14e561a4b3b9" > Flotation selectivi...

Flotation selectivity of novel alkyl dicarboxylate reagents for calcite-fluorite separation

Karlkvist, T. (författare)
Luleå University of Technology (LTU),Luleå tekniska universitet (LTU)
Patra, A. (författare)
Luleå University of Technology (LTU),Luleå tekniska universitet (LTU)
Bordes, Romain, 1981 (författare)
Chalmers University of Technology,Chalmers tekniska högskola,Department of Chemical and Biological Engineering, Chalmers University of Technology
visa fler...
Holmberg, Krister, 1946 (författare)
Chalmers University of Technology,Chalmers tekniska högskola,Department of Chemical and Biological Engineering, Chalmers University of Technology
Rao, Kota Hanumantha (författare)
Norwegian University of Science and Technology (NTNU), Norway
Patra, Anuttam (författare)
Luleå tekniska universitet,Kemiteknik
Rao, Hanumantha (författare)
Norwegian University of Science and Technology (NTNU), Trondheim
Karlkvist, Tommy (författare)
Luleå tekniska universitet,Mineralteknik och metallurgi
visa färre...
 (creator_code:org_t)
2016
2016
Engelska.
Ingår i: Tenside, Surfactants, Detergents. - 0932-3414 .- 2195-8564. ; 53:6, s. 516-523
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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 for comparison in the study. Experiments using a Hallimond flotation tube showed that although the flotation reagents solely differ 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 zeta-potential and the flotation recovery of the mineral particles as a function of added collector were 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.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering (hsv//eng)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

surfactant
adsorption
mineral specific reagents
mineral processing
Froth flotation
Mineral Processing
Mineralteknik
Framtidens gruvor (FOI)
Future mining (AERI)

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