NUST MISIS College of Mining, Moscow, Russia

T. I. Yushina, Candidate of Engineering Sciences, Associate Professor, Head of the Department of Mineral Processing and Technogenic Raw Materials, e-mail: yuti62@mail.ru

LLC BioChemProm, Moscow, Russia.
S. A. Shchelkunov, Candidate of Chemical Sciences, Technical Director, e-mail: shelkunov66@mail.ru
O. A. Malyshev, Candidate of Technical Sciences, General Director, e-mail: omalyshev57@mail.ru

The article presents the results of theoretical calculations and experimental studies to assess the possibility of using reagents based on acetylene alcohols as an additional collector in the flotation of copper-zinc ores. The correspondence of theoretical and calculated data to the results of flotation of copper-zinc ores with the use of acetylene reagents capable of forming π-complexes with zinc sulfides, mainly by the nucleophilic mechanism, is proved. The individual ability of the DMIPEC reagent to form π-complexes with zinc by nucleophilic and electrophilic mechanisms, as well as the individual ability of the molecules of the DC-80 reagent to attach to zinc atoms by the mechanism of substitution reaction was revealed. Flotation studies in laboratory conditions on samples of sulfide ores of some deposits of Kazakhstan have obtained a significant increase in the level of extraction of target metals, including zinc, a decrease in zinc losses in copper concentrate by 7.8%, an increase in the quality of copper concentrate by 4.9% when used as an additional collector of reagents of the acetylene alcohols class.

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