FIELD: concentration of mineral resources, in particular, demantoids; applicable in mining and other branches of industries. SUBSTANCE: device uses a double - sieve vibroshaker and a jigging machine with two bins for concentrate of different grain sizes communicating with it communicating with an auxiliary jigging machine through discharging troughs. The capacity of the bins of the auxiliary jigging machine is 3-4 times lower than that of the main jigging machine. Besides, the device is furnished with a concentration recleaner. EFFECT: enhanced efficiency. 2 cl, 1 dwg
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