FIELD: concentration of minerals; concentration of ore raw material requiring preliminary grinding.
SUBSTANCE: proposed method includes crushing, grinding, floatation and cyaniding of ore. At grinding stage, bornyl acetate is added in the amount of 30-45 g/t which is obtained by extraction from sage-brush or fir oil. Ground ore is subjected to classification and fraction of ore lesser than 0.1 mm is directed for main floatation, further cyaniding and sorption by coal.
EFFECT: increased extraction of finely-disseminated - finely-dispersed gold from auriferous ores; enhanced operational efficiency of grinding unit; reduced power requirements.
3 dwg
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