EXTRACTIONOFGOLDFROMTECHNOGENICRAWMATERIALS: THEPRACTICE OFTHEJSC "UGC"
The experience of sorption cyanidation of technogenic raw materials with the extraction of gold from the tailings of gold-arsenic ores of the Novotroitskoye Deposit in industrial conditions. The optimal parameters for leaching gold into the solution for ore processing waste characterized by increased "resistance" to cyanidation and relatively low content of precious metals were selected. The granulometric composition of the process sample was determined to assess the effect of the fraction of the finished class -0.075 mm on the efficiency of Au extraction. The physico-chemical environmental parameters during the experiment, the dependence of indexes of gold extraction of stale wastes from the thickness of the grinding tailings of the concentration of the reagent NaCN and the duration of the leach cycle. The optimal parameters of sorption cyanidation of stale gold-arsenic ore waste have been identified, which allow processing of technogenic raw materials at the existing gold recovery factory with minimization of energy costs. The obtained results of technological tests of stale gold-arsenic tailings of enrichment are confirmed by the conclusions of rational analysis and mineralogical studies, that the sulfide minerals in which gold is concentrated are fully disclosed-they are mainly represented by individual grains that are easily amenable to cyanidation.