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

BioKhimProm LLC, Moscow, Russia:
S. A. Shchelkunov, Candidate of Chemical Sciences, Chief Technical Officer, e-mail: shelkunov66@mail.ru
O. A. Malyshev, Candidate of Chemical Sciences, Chief Executive Officer, e-mail: omalyshev57@mail.ru

Given in the paper are the results of calculations of the simplest quantum-chemical parameters of the structures under consideration formed in the mineral–flotation reagent system by the method of molecular mechanics (MM2). Theoretical computations on the interaction mechanism between unsaturated alcohols and gold atoms in various energy states are formulated. There were determined the causes and ascertained the regularities of selective fixation of reagents with triple bonds, which are tertiary alcohols, on the surface of liberated grains of gold and gold-containing minerals. Presented are the results of practical flotation studies, which have showed that the use of acetylene reagents allows one to selectively obtain additional gold recovery from gold-bearing ores from 2.4 to 5.0% relative to the basic flotation indicators.

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