METHOD FOR EXTRACTION OF FINE GOLD IN PROCESS OF GOLD-BEARING SANDS CONCENTRATION IN GRAVEL DEPOSITS

摘要

FIELD: mining.;SUBSTANCE: invention relates to concentration of minerals and may be used to concentrate hard-to-concentrate gold-bearing raw materials that contain fine "floating" gold. Method includes screening of gold-bearing material, its treatment with reagent, mixing and separation of gold in dressing apparatus. As reagent they use sodium polyphosphate in amount of 300 g/t. To control pH medium in the range of 6-7, sodium carbonate Na₂CO₃ is added in amount from 10 to 15 g/t, at the same time treatment with reagent is carried out at the second stage of centrifugal concentration for 40 minutes with further extraction of gold in dressing apparatus.;EFFECT: improved extraction of fine gold, reduced costs for reagent treatment of material.;2 dwg