Mining Institute, Far East Branch of Russian Academy of Science (Khabarovsk, Russia):

Prokhorov K. V., Leading Researcher, Candidate of Engineering Sciences, kostyan1986_ne@mail.ru
Kopylova A. E., Junior Researcher

Irkutsk National Research Technical University (Irkutsk, Russia):
Burdonov A. E., Associate Professor, Candidate of Engineering Sciences

This paper studies a combined flotation regime with the liquid phase represented by an electrolysis product slurry of the initial material solution, which consisted of pneumoflotation tailings of gold-quartz formation ores and contained dispersed gold. The paper substantiates the method of staged flotation in electrolysis products, initially prepared on the basis of a catholyte, with subsequent introduction of a certain amount of anolyte, allowing to increase the concentrate yield by recovering the finest particles of the valuable component. Preliminary electrochemical treatment of the solution in the anode and cathode chambers of the electrolysis cell ensured its pH and Еh conditioning and facilitated generation of microbubbles of flotationactive hydrogen and oxygen immediately before slurry preparation for flotation. The resulting increase in the flotation concentrate yield through the recovery of the finest particles of valuable components has been experimentally confirmed. Flotation in a preliminarily prepared catholyte and batchwise addition of anolyte to the catholyte have improved gold and silver recovery into the concentrate by 25 and 17 %, respectively. Flotation using electrolysis products is therefore deemed effective. Batch mixing of catholyte and anolyte serves as a mechanism for ensuring the optimal values for those parameters that affect the recovery of valuable components.
The research was carried out using the resources of the Center for the Collective Use of Scientific Equipment «Center for Processing and Storage of Scientific Data of the Far Eastern Branch of the Russian Academy of Sciences», funded by the Ministry of Science and Higher Education of the Russian Federation, under project No. 075-15-2021-663.

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