METHOD FOR GRAVITY CONCENTRATION OF SANDS OF PLACERS WITH HIGH CONTENT OF FINE AND THIN GOLD Russian patent published in 2016 - IPC B03B5/10 

FIELD: mining.

SUBSTANCE: invention can be used in developing natural and technogenic gravel deposits of mineral deposits with high content of fine and thin gold. Method for gravity concentration of sands of placers with high content of fine and thin gold is performed in alignment of forward feed pulp with vibration jigging by means of installation, including a board, rigidly connected without any gaps with installed in series with stepped reduction by limiters relative to horizontal line and provided with artificial foundation with horizontal perforated base of jigging compartments, system for loosening bed of jigging material in form of mechanical vibrator, system for feeding water into jigging compartments, accumulation in lower part of jigging compartments of jigging material and its periodic unloading. Forward feeding of pulp in sold to liquid ratio of 1:4 is carried out successively into working zones of jigging compartments with artificial saddles in form of crushed rock with size of lumps from 10 to 30 mm and layer thickness of up to 100 mm, by cascade flow through U-shaped slots whose width is at least twice greater than maximum size of piece of rock in pulp, in upper part of limiters on upper level of artificial foundation and mounted between jigging compartments to create extra turbulence. While filling artificial foundation with jigging material with a period of its accumulation of 10-15 minutes. vibration-shaking is carried out by mechanical vibrator system for bed loosening, arranged on sides of apparatus, equipped with elastic supports for 3-5 minutes without stopping pulp feed. After next unloading of jigging material, jigging compartments are filled with water.

EFFECT: higher efficiency of extraction of fine and thin gold from primary materials of placers without additional disintegration of sands, including high-clay, higher reliability.

1 cl, 2 dwg