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PROCESSING AND COMPLEX USAGE OF MINERAL RAW MATERIALS
ArticleName A revisit of selection the efficiency criterion for flotation reagents of fatty acids class
DOI 10.17580/em.2017.01.07
ArticleAuthor Kondratyev S. A., Semyanova D. V.
ArticleAuthorData

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia:

Kondratyev S. A., Doctor of Engineering Sciences, Head of Complex Mineral Mining and Processing Department, kondr@misd.nsc.ru
Semyanova D. V., Postgraduate, Complex Mineral Mining and Processing Department

Abstract

The collective ability of desorbed species (DS species) of saturated carboxylic acids is reviewed. DS species of a reagent denote the forms capable of moving from the mineral surface to the bubble, i.e., to the gas-liquid interface, at the moment of breakout of the interlayer separating these interconnected objects. Experiments on fluorite ore in the presence of mixed cover, including physical and chemical sorption forms, and cover containing only chemical form are performed. As is shown, the removal of physical sorption form decreases recovery of fluorite in concentrate. It was determined, that physical sorption form of carboxylic acid provides specific collective function. The spreading rate of carboxylic acids on water surface is determined at pH 7 and 10. The spreading rate of carboxylic acids is comparable with flotation parameters of fluorite ore with mentioned collectors. The sequence of increasing the spreading rate of middle- and long chain carboxylic acids corresponds with the sequence of increasing fluorite recovery in foam product. A criterion for estimating the collective capacity of carboxylic acids is proposed. Advisability of its application for selection flotation reagent with required collective ability is estimated. Values of forces that influence the liquid in the interlayer at the side of the spreading film of the reagent DS species and the water flow rate from the interlayer are evaluated.

This study was financed by RSF grant No. 15-17-10017.

keywords Flotation, criterion for selecting collector agent, saturated carboxylic acids, surface pressure
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