METHOD OF LEACHING GOLD FROM REFRACTORY ORES Russian patent published in 2018 - IPC C22B11/00 C22B3/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for leaching gold from quenching ores which is carried out with electrophotoactivated sulfuric acid-peroxide solution containing both stable and metastable peroxide compounds. Two-stage treatment of the sulfuric acid solution consists in saturation with diatomic oxygen in the first stage and electrochemical treatment at the second stage. Hydrogen peroxide is added to the resulting electroactivated solution and subjected to photochemical treatment. Secondary treatment of the mineral mass is carried out with sodium chloride solution to form active chlorine-oxygen complexes when mixed with an electrophotoactivated sulfuric acid-peroxide solution. Active chlorine-oxygen complexes provide leaching of the main part of gold. After secondary treatment, leaching of complex gold forms is carried out using an electrophotoactivated solution of the chloride complexing reagent.

EFFECT: technical result is an increase in the recovery of fine and dispersed gold in the ore.

1 cl, 1 ex