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Journal of Mining Sciences

2017 year, number 5

Experimental Investigation of Change in the Contrast between Flotation Properties of Calcic Minerals

V. A. IGNATKINA
National University of Science and Technology, Leninskii pr. 4, Moscow, 119049 Russia
Keywords: флотация, кальцит, шеелит, контрастность, сочетание собирателей, смачиваемость, мицеллобразование, водородные связи, Flotation, calcite, scheelite, contrast, combination of collectors, wettability, micelle formation, hydrogen bridges

Abstract

The interaction of fatty acid sodium oleate collector and higher isoalcohols in liquid phase and on the surface of separated minerals of scheelite and calcite is investigated. The research findings on monophase calcite and scheelite are presented with their X-ray patterns and IR spectra. The experimental data show the contribution of the intramolecular interactions in combinations of differently ionizable oxyhydryl collectors on the increase in the contrast between floatabilities of scheelite and calcite. The IR spectroscopy states that the maximum strength of the intramolecular hydrogen bridges between oleate and isoalcohols in the range of 300-3200 cm-1 fits with the molar ratio 2. Isoalcohols in the surface layer of scheelite neutralize hydrophilic behavior of oleate micells by means of generation of heteromolecular associates through hydrogen bridges, loosen hydtrated layer and enhance air bubble attachability; adhesion of isoalcohol drops improves floatability of scheelite; higher isoalcohols reduce flotation activity of calcite. The maximum contrast in flotation properties is observed in slimes at oleate concentrations fit the micelle formation process.