Institute of Chemistry and Chemical Technology, Siberian Branch of RAS (Russia);

Zashikhin А. V., Researcher, obog2006@yandex.ru

JSC «Artel of prospectors AngaraNorth» (Russia);

Guryanov А. Ye., Director, gmkzoloto@mail.ru

JSC «Artel of prospectors Angara-North» (Russia);

Аnanenko K. Ye., Associate Professor, Ph. D. in Engineering Sciences, ananenko@inbox.ru

A number of essential shortcomings of the conventional method of gold-containing concentrates final treatment, that cause valuable component losses, are described. It is shown, that losses are significantly decreased with introduction of largevolume survey and final concentration stage modules with 1–5 t/hr throughput rate. Location of concentration module very close to mining site permits, furthermore, to organize onthespot regular largevolume sampling of both feed sands and taking of local samples from sluice box location. It is noted, that design of concentration modules must provide for efficient method of sluice box concentrate feeding to final concentration stage plants, especially when local topography rules out gravity feeding and provision of access at receiving bin level. It was established, that main losses of valuable component at one of mining sites were due to the presence of goldrutile intergrowths. In accord with the phase analysis data, placer minerals are represented by ilmenite, rutile, pyrite, magnentite, titanomagnetite and cassiterite. Based on the results of the studies, an efficient flow sheet was developed and introduced for gravity concentration plant with hydraulic elevator material feeding, designed for goldcontaining sands concentration with application of stateoftheart concentrating equipment. Microscopical analysis of concentration plant products was performed. It is shown, that heavy concentrate contains silver, its recovery being of a commercial interest for the facility.

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