FIELD: concentration of minerals; equipment for extraction of noble metals from placers. SUBSTANCE: washing unit includes screen, sluice box with stencils, final concentration device and drive. Sluice box and final concentration device are interconnected and are mounted on common framework; drive is provided with unbalance mass and stencils are made in form of grates whose transversal plates are located at distance of 0.5-0.7 m from each other and at angle relative to bottom of sluice box. EFFECT: enhanced efficiency of disintegration and classification of sands; simplified construction of unit. 2 dwg
| Title | Year | Author | Number |
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|
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RU2269379C2 |
