METHOD OF DEVELOPMENT OF ALLUVIAL DEPOSITS, MAINLY GOLD-BEARING Russian patent published in 2010 - IPC B03B7/00 

FIELD: mining.

SUBSTANCE: method of alluvial deposits development, mainly gold-bearing, includes sand delivery and its processing using mineral processing equipment, starting with disintegration and wet screening on vibratory screen and material separation to factions by size. Separation by size is performed according to three fractions -large (+10 mm), middle (-10 +5 mm) and small (-0.5 mm), large fraction is subject to sorting with extraction of mineralised fraction, which analysis proved industrial content of gold, is sent to dressing-works, and non-mineralised fraction is sent to waste pile. Middle by size fraction is disintegrated with pure water addition and is separated by density and divided into sinking fraction (heavy mineral concentrate) and floating fraction (light mineral concentrate). Heavy mineral concentrate is dressed on dressing plant with extraction of free metal, which is delivered to wage house, and remaining material containing bound metal is sent to dressing-works. Light mineral concentrate, if its analysis proved industrial content of gold, is sent to dressing-works, and if metal content is not industrial, it is sent to waste pile. Small fraction is precipitated and clarified water is put into operation, and residual with industrial content of small, thin and bound gold is sent to dressing-works. Separation of source material by size is performed by means of sequential division of large fraction at first (+10 mm), then middle fraction (-10 +0.5 mm) is separated from residual material with size -10 mm, and all the residual material forms small fraction (-0.5 mm). Sorting by degree of large fraction material mineralisation is performed manually. Precipitation in settler of small fraction is performed by means of material stockpiling with possibility of natural removal of clarified water.

EFFECT: improvement of effectiveness of metal extraction from alluvial deposit.

4 cl, 1 dwg, 1 ex