METHOD FOR GRAVITY EXTRACTION OF FINE AND THIN GOLD AND SYSTEM FOR GOLD EXTRACTION Russian patent published in 2016 - IPC B03B5/70 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for gravity extraction of precious metals from ores, as well as natural and technogenic deposits. Method for gravity extraction of fine and thin gold involves preliminary disintegration and classification of high-clay sands, feeding prepared pulp material into straight inclined chute of dressing plant into thin-layer flow with flow of rigidly fixed arc-shaped plates, installed with converging clearance on both sides of main flow of pulp, trapping gold with detachable traps of fine gold with straight and rounded walls. Thin-layer flow of pulp, turning from laminar and weakly turbulent rectilinear motion to bend in narrowing gap between arc-shaped plates, installed with displacement along straight inclined chute in staggered order, forms offset layers pulp flow on horizontal and vertical, capable of releasing more coarse particles of valuable components from clay particles and directing them to upper plane of removable trap of fine gold of one of sides. Then pulp flow strikes against cap and arc-shaped plate of said side, undergoes secondary bending, mixing, turbulence of pulp flow occurs, which results in release of additional part of valuable components from clay particles and direction to removable trap of fine gold of another side, where already finer particles of valuable components fall into cells of hexagonal shape of detachable trap of fine gold, are deposited on bottom of housing detachable trap of fine gold. Method is implemented by means of a system for gold extraction, including an installation for preliminary disintegration and classification of high-clay sands, transfer elements and elements of feeding pulp into dressing unit into thin-layer flow in form of straight inclined chute with sides and rigidly fixed arc-shaped plates, installed with converging clearance on both sides of main flow of pulp at bottom, detachable traps of fine gold with straight and rounded walls. Arc-shaped plates are installed with displacement along straight inclined chute in staggered order, forming bends of pulp flow from one side of straight inclined chute to another side and vice versa. End parts of arc-shaped plates are interfaced with recesses in bottom of straight inclined chute, in which there are detachable traps of fine gold with possibility of vertical movement and are made detachable in form of housing and cassettes with cells of hexagonal shape. At bottom of straight inclined chute there are mats.

EFFECT: high efficiency of extraction of fine and thin particles of valuable components in thin-layer flows, reduced losses of valuable components.

2 cl, 4 dwg