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
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