FIELD: mining.
SUBSTANCE: invention relates to mining industry and can be used for enrichment of initial sands of placer deposits of gold, platinum, tin and other heavy metals in initial free mass (including those introduced into such state by special methods, for example, sieving or crushing). Pipe-and-branch concentrator is made in the form of a pipe wound in a spiral as a cylindrical spring, at the inlet of which there is a mixer installed, and at the output – a control valve. Spiral is placed in a rigid frame with supporting and supporting-compressing brackets and sites for arrangement of vibrators, which is attached to the rigid support by means of damping springs. Separate sections of the pipe have a narrowed section.
EFFECT: increased extraction of heavy components from enriched rock mass.
1 cl, 4 dwg
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