FIELD: mining.
SUBSTANCE: invention relates to enrichment of minerals, particularly, to apparatus for extracting fine gold from clay gold-bearing rocks. Proposed method comprises pulse rate evacuation in vacuum chamber by vacuum pump, receiver and pipelines with high-speed valves. Pulse vacuumisation is performed for not more than 1 s, at that, pressure in working chamber is reduced to 0.4 kPa, with further reduction to 13 Pa at the operating pump for not more than 10 seconds.
EFFECT: method increases output of ultrafine particles of precious metals when extracted from gold-bearing clay rocks.
1 cl, 4 dwg
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