Collectability and Selectivity of Physical Adsorption of Carbonic Acids during Flotation
S. A. KONDRAT’EV, I. I. BAKSHEEVA, D. V. SEM’YANOVA
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: флотация, карбоновые кислоты, химическая и физическая формы сорбции, поверхностное давление, flotation, carbonic acids, chemical and physical types of adsorption, surface pressure
Abstract
The collecting ability of desorbable species (DS-species) of carbonic acids is analyzed. The spreading velocity and surface pressure of some fat acids are correlated with their collectability. It is found that an increase in the hydrocarbon chain length to a certain limit results in the higher collectability of carbonic aids, which correlates with the high spreading velocity of derivants of the acids on water surface. The cause of reduction in the collecting ability of short-chain collectors is discovered. It is shown that an adequate criterion of fat acid collectability can be the surface flow thickness of the agent’s DS-species film. The flotation performance with the mixed chemisorptions and physisorption coat and with the coat represented by chemical adsorption is estimated. The causes of the decrease in the valuable component recovery and in the concentrate quality without the physical form of reagent adsorption at a mineral surface are revealed.
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