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EXTRACTION OF GOLD FROM MAN-MADE MINERAL RAW MATERIALS BY METHODS OF FLOTATION ENRICHMENT AND CYANING

M. Erdenova, B. Kenzhaliyev, А. Koizhanova, S. Temirova, N. Abdyldaev
Thursday 11 October 2018 by Libadmin2018

ABSTRACT

The effectiveness of the application of ultrathin grinding during processing of man-made raw materials (stale tails) of the Kazakhstan concentrator is shown. According to the results of rational analysis, gold is found in rock-forming minerals in finely dispersed form (28.2%), is associated with the crystal lattice of the carrier mineral (13.3%), free and in the form of intergrowths with ore components (26.6%) and fine-grained in rock-forming minerals (31.9%). In flotation enrichment of man-made raw materials in a closed cycle, extraction of gold into concentrate under optimal conditions amounted to 68.86%. For the production of the flotation concentrate the most optimal are: the grinding size of 95% of the class is 0.040 mm for 20 minutes, while the concentrate yield is 4.64% with a gold content of 4.9 g/t. In the chemical oxidation of the resulting concentrate (calcium hypochlorite) followed by cyanidation, gold recovery reached 71.9%. Based on the experiments in a closed loop, an instrumentation-technological scheme for processing man-made mineral raw materials of the concentrating factory was developed.

Keywords: gold, man-made raw materials, ultrafine grinding, flotation concentration, cyanidation.


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