FIELD: sampling and trapping of heavy metals from concentrated pulp from sluice boxes, applicable at enterprises diggering gold and heavy metals from gravel deposits by scrubber-sluice devices. SUBSTANCE: the device is mounted near the sluice discharge part, it is made detachable in the form of an incomplete cylinder with end walls. The cylindrical case accommodates a rubber cellular mat, net and a perforated sheet. In the process of operation use is made of centrifugal and gravitational forces; as a result, concentration of sampled material up to "grey" slimes is accomplished. EFFECT: enhanced efficiency. 3 dwg
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