Effect of Chemical and Phase Compositions on Absorption and Flotation Properties of Tin-Sulphide Ore Tailings with Dibutyl Dithiocarbamate
T. N. Matveeva, V. A. Chanturia, N. K. Gromova, L. B. Lantsova
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, 111020 Russia
Keywords: сульфидные оловянные руды, хвосты обогащения, флотация, ксантогенат, дибутилдитиокарбамат, Tin sulphide ore, tailings, flotation, xanthate, dibutyl dithiocarbamate
Abstract
Using UV-visible spectrophotometry, it is found that old tailings of Solnechny Mining and Processing Plant are characterized with high absorptive capacity relative to sodium dibutyl dithiocarbamate (DBDTC) and require high consumption of collecting agents in flotation. The optical and scanning electron microscopy tools revealed gypsum-cemented finely dispersed fractions (smaller than 20 μm) coating larger mineral particles (60-80 μm). Minerals are represented by chalcopyrite, pyrrhotine, pyrite, sphalerite, jamesonite and cassiterite; rocks are quartz and silicates. A feature of these old tailings is supergene mineralization and sulphide oxidation products. Alongside with cassiterite, varlamovite is present, which is a typical product of alteration of tin sulfosalts from stannite group. New experimental data on flotation of Solnechny MPP tailings with DBDTC are obtained. The flotation experiments show that DBDTC addition to butyl xanthate (at a ratio of 1:3) enables increased recovery of copper, lead, zinc and silver in bulk concentrate and reduces loss of these minerals in slime.
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