| 摘要 |
FIELD: concentration of mineral resources, in particular, gravity concentration devices of continuous action for treatment and concentration of fine-disperse and slime metal- and gold-bearing materials. SUBSTANCE: hollow concentrator drum installed for rotation about the horizontal axis accommodates at least two aligned rigidly coupled hollow drums of smaller diameter with an opposite direction of conical expansion; each drum is furnished with a sprinkler and trough for discharge of concentration products installed for angular turn and lining of the internal entrainment tapered surface, and the angle of inclination of the generating line of the drum tapered surfaces to the horizontal axis is within 3 to 6 deg, and the relation between the larger diameter of each drum and its length is determined from relation D:L= 1: (1.5-3.0). EFFECT: enhanced extraction and concentration of particles of precious minerals at a sufficiently high capacity and stability of continuous operation. 1 dwg
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