Institute of Comprehensive Exploitation of Mineral Resources of the Russian Academy of Sciences (Moscow, Russia):

Matveeva T. N., Head of Department, Doctor of Engineering Sciences, tmatveyeva@mail.ru
Gromova N. K., Researcher, gromova_nk@mail.ru
Minaev V. A., Leading Engineer, Candidate of Geological and Mineralogical Sciences, minaev2403@mail.ru
Lantsova L. B., Leading Engineer, lblancova@yandex.ru

The results of the experimental study of physicochemical properties of chalcopyrite, galena, arsenopyrite, pyrite and cassiterite, as components of lode tin ores, following their surface modification by stable metal-dibutyldithiocarbamate complexes (DBDTC), are presented. DBDTC was selected as a strong sulphydric collector, possessing complexing properties with respect to copper, lead, silver and other non-ferrous and noble metals, for application in bulk flotation of sulfide minerals, as components of complex tin ores, with a view to prevent transfer of sulfides into tin concentrate. By means of the methods of analytical scanning electron microscopy ASEM (LEO 1420VP INCA Oxford Energy 350) and laser microscopy (Keyence VK-9700), through measurements of electrode potentials of mineral polished sections by potentiometric titration method and with the help of monomineral flotation, individual character of DBDTC adsorption layer formation on chalcopyrite, galena and arsenopyrite surface has been established, reagent’s films dimensions and their attachment strength have been determined. It is noted, that cassiterite indifference to DBDTC provides for its selective separation into sands product in sulfides flotation. It is shown, that sulfides surface modification by stable metal-dibutyldithiocarbamate complexes increases their recovery into bulk sulfide concentrate in lode tin ores flotation.
The studies were performed with the aid of the Russian Science Foundation Grant (Project No. 17-17-01292).

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