Thermodynamic Analysis of Effect of Control Reagents on Lipophilicity and Attachment of Organic Colector on Diamonds and Hydrophobic Kimberlite Minerals
V. V. Morozov, V. A. Chanturia, E. L. Chanturia, G. P. Dvoichenkova
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources-IPKON, Russian Academy of Sciences, Moscow, Russia
Keywords: Diamonds, kimberlite, collector, wetting, surfactants, adhesion efficiency
Abstract
The analysis of organic collector adhesion to the surface of diamonds and kimberlite minerals in an aqueous medium determined the main characteristics of physical and chemical properties of the mineral-water-collector interfaces and the collector adhesion patterns at variation of the type and concentration of different class control reagents. It is found that control reagents reduce differently adhesion of an apolar collector to diamonds and floatable kimberlite minerals. This allows expecting a positive effect of the increased selective attachment of the collector to minerals being separated. The criterion of the collector attachment selectivity is proposed to be the ratio of adhesion energies of an apolar collector at diamond, talk and phlogopite. The test results demonstrated a tight correlation between the coating of diamond and kimberlite surfaces with an organic collector and the collector adhesion to diamond and phlogopite. The applicability of the proposed criterion for the selection of the control reagents for selectivity of attachment of apolar collectors in weakly mineralized recycled water is substantiated. The visiometric process analysis of attachment of a luminophore-bearing apolar collector at minerals of a diamond-kimberlite mix shows that the use of sodium hexametaphosphate and oxyethylene diphosphonic acid reduces amount of an organic collector on the surface of kimberlite and enhances stability of the collector adsorption on the surface of diamonds.
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