DOI: 10.18503/1995-2732-2025-23-1-17-25
Abstract
The article presents the studies results of factors affecting the effectiveness of flotation of gold-bearing ores. One of the main problems in the enrichment of gold-bearing ore deposits is the extraction of small grades of gold. To estimate the energy of chemical bonds formation of reagents with the surface of minerals, quantum chemical calculations of the acetylene-containing reagent DMIPEK were performed using the method of molecular mechanics (MM+) developed for organic molecules in the HyperChem - 7 (HCh - 7) program. For visual studies of the patterns of flotation of small mineral particles, diagrams illustrating the formation of flotation complexes with the participation of reagents in the inertialess mode were created in the Inkscape graphic editor. Schemes of the proposed interaction of small mineral particles with gas bubbles during flotation are also demonstrated. The selective interaction of acetylene-containing reagent molecules with the surface of small minerals is due to the nature of the donor-acceptor interaction and does not depend on the absence or presence of a hydrophobic effect. It allows to detect small mineral particles on the surface of bubbles, in the structure of the bimolecular shells of which acetylene-containing molecules are located. The features of the formation of organomineral complexes and π-complexes of gold with oxidized and sulfide surfaces of minerals are noted. Positive results on the flotation of the gold-bearing ore of the Akbakai Mining and Processing Plant were obtained using the acetylene-containing reagent DMIPEK in the amount of 33-50 g/t. When using the DMIPEK acetylene-containing reagent, additional extraction of metals into concentrates is observed in the presence of ore particles of at least 80% of the 0.074 mm grade.
Keywords
tertiary acetylene alcohols, DMIPEK flotation reagent, gold-containing ore, hydrophobic effect, π-complexes
For citation
Petukhov V.N., Svechnikova N.Y., Voloshchuk T.G., Yudina S.V., Shchelkunov S.A., Malyshev O.A. Influence of DMIPEK Tertiary Acetylene Alcohols on the Flotation of Gold-Bearing Ores. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 1, pp. 17-25. https://doi.org/10.18503/1995-2732-2025-23-1-17-25
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