FIELD: extraction of precious metals from sands in auriferous gravels. SUBSTANCE: sluice has a chute with trapping coating, concentrating chamber, a barrel with blades and loosening devices and a facility to adjust shaft height of the barrel. The sluice has a device to adjust height of trapping coating downstream the concentrating chamber, and loosing device are installed hinged and spring loaded. EFFECT: extraction of precious metals of high efficiency. 6 cl, 1 dwg
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|---|---|---|---|
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RU1422455C |
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RU2138337C1 |
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RU2136375C1 |
