METHOD OF CONCENTRATING OF PRECIOUS METAL-DEPOSIT GRAVELS Russian patent published in 1998 - IPC

Abstract RU 2117531 C1

FIELD: mineral dressing. SUBSTANCE: gravels are subjected to the first concentration to produce placer concentrate that is sorted into size fractions and each one is then separately subjected to gravity concentration. Particle sizes of fractions are chosen taking into account different velocities of fall in water for precious metal particles, rock particles, and joined metal-rock particles. This condition may be expressed by inequalities for coarse fraction: V₁ > V₂ and for fine fraction: V₃ > V₂, where V₁ is fall velocity in water for joined particles with smallest diameter in this fraction; V₂ fall velocity in water for rock particles with largest size in this fraction; and V₃ is fall velocity in water for metal particles in fine fraction with smallest size in this fraction. EFFECT: increased efficiency of catching fine fractions.

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RU 2 117 531 C1

Authors

Kuz'Minykh V.M.

Moiseenko V.G.

Dates

1998-08-20—Published

1996-12-09—Filed