METHOD FOR ENRICHMENT OF SOLUTIONS WITH LOW GOLD CONTENT Russian patent published in 2013 - IPC C22B11/00 C22B3/26 B03D1/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydrometallurgy of noble metals. The method for enrichment of solutions with low gold content includes development of an organic catching film on the surface of a solution in floatation chambers and passage of air bubbles for sublate floatation. At the same time extractants used for gold extraction are added preliminarily to a substance of the organic catching film, being a matrix for processes of gold ions and molecules catching and retaining. The solution with low gold content is filtered, acidified to pH of 1.5-2.0, and a collector is added to it, then the floatation chamber is filled to the half with the specified solution, and with the organic matrix with extractants, the volume of which does not exceed 0.5% of the volume of the entire solution, and intensive mixing is started. After mixing the floatation chamber of the operating machine is filled with the solution to the full, additional floatation is carried out for complete collection of the matrix into a single drop, and then it is separated from the solution.

EFFECT: possibility to produce a highly concentrated product of gold catching on a large commercial scale from used weakly-concentrated practically worthless process solutions.

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