Both mechanical and hydrometallurgical beneficiation methods are used in the processing of precious metals. One of the common methods of precious metals processing is hydrometallurgy, where the risk of environmental contamination is higher due to the fact that toxic chemicals are mostly used. In the combined technology, the environmentally friendly gravity method is mainly used in the initial stage. Flotation beneficiation process does not always provide the maximum recovery of gold and silver in the concentrate and is replaced by hydrometallurgical processes in production. Therefore, obtaining high quality concentrate by flotation processing is very topical. The paper presents the results of obtaining high quality concentrate of precious metals by flotation method of beneficiation. Within the framework of the project, a column-type flotation cell was manufactured, in which the presence of an ascending air flow ensures the distribution of bubbles in the pulp and the maintenance their floating up speed, which determines the homogeneity of the pulp and helps to attach the reagent to hydrophobic minerals. In order to obtain a high quality concentrate and reduce economic costs, the sample was divided into three size classes, the finished flotation class -0.074 mm was separated and each class was ground separately. As a result of grinding, the above-mentioned classess were combined. In order to obtain high quality concentrate and reduce the loss of useful components, two collectors were used simultaneously. Potassium butyl xanthogenate and aeroflot were selected as collecting agents. Their ratio and cost were determined. As part of the research, chemical, silicate, sieve and mineralogical analyses of the sample were performed, as well as petrographic description was carried out. The optimal regime parameters of the flotation process were determined, as a result of which a high-quality concentrate of precious metals was obtained, with gold content of 14.25 g/t, silver content of19.05 g/t, recovery of useful components in the concentrate - 93.8. % and 90.4%, respectively.

Beneficiation, solution, pick out, content, flotation