FIELD: oil and gas industry.
SUBSTANCE: method involves saturation of the waste pulps with electrolytic gases and electroflotation in the electroflotation strings. The resulting froth pulp is sent to the hydrometallurgical processing. The depleted secondary residues, oxygenated and activated during the electroflotation, containing the underoxidized suspended mineral particles, are subjected to thickening. The sewages formed after the thickening is subjected to electrosorption in two stages. Initially, the industrial precious metals and toxic elements for biota are isolated. At the second stage, the colloidal gold is sorbed with the help of anion exchangers, prepared in CN- and OH- forms. The final solution obtained after the electrosorption is conditioned by pH and after addition of the appropriate complexing agents, it is directed to mine and/or heap leaching.
EFFECT: costs reduction.
1 dwg, 1 ex
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