Institute of Problems of Integrated Development of the Subsurface of the Russian Academy of Sciences, Moscow, Russia

T. A. Ivanova, Senior Researcher, e-mail: tivanova06@mail.ru
M. V. Ryazantseva, Senior Researcher, e-mail: ryzanceva@mail.ru
I. G. Zimbovskiy, Researcher, e-mail: zumbofff@gmail.com

The influence of inorganic regulators — ammonium thiocyanate and copper sulfate on the sorption of diantipyrylmethane (DAM) — is studied when it is used as a collector for the flotation of sulfide minerals and cassiterite, which are part of complex tin ore. To conduct sorption and flotation experiments, polished minerals and samples of minerals were used: chalcopyrite, pyrite, pyrrhotite, arsenopyrite, galena, sphalerite and cassiterite. Using UV spectrophotometry on UV-1700 Shimadzu, Fourier transform IR spectroscopy on an IR-Affinity (Shimadzu) scanning electron microscope (SEM) LEO 1420VP with an INCA 350 X-ray microarray and KEYNCE with VK-9700 laser microscopy an activating action (NH₄SCN) or (CuSO₄) on sorption of DAM in galena, chalcopyrite, cassiterite due to the formation of stable complex LAM-metal complexes was established. On the surface of pyrite, pyrrhotine, arsenopyrite, traces of fixation of the DAM reagent were not found. The activating effect of copper on the sorption of diantipyrylmethane on the surface of cassiterite in an acidic medium is established, which is a prerequisite for the use of the DAM reagent in the flotation of cassiterite. The selective change in the hydrophobic properties of sulfides in an alkaline medium and cassiterite in an acidic medium, associated with the adsorption of DAM, can be used in the flotation of tin sulfide ores to improve the contrast of the properties of these minerals and, consequently, improve their separation.

The study was carried out at the expense of a grant from the Russian Science Foundation (project No. 17-17-01292).

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