FIELD: metallurgy.
SUBSTANCE: metallurgy of noble and heavy non-ferrous metals, intended for the extraction of noble metals - gold and silver, as well as other non-ferrous metals along the way, from refractory pyrrhotite-arsenopyrite ore and technogenic gold-containing mineral raw materials, characterized by process resistance to the cyanide method for dissolution of noble metals due to the fine, uniform dissemination of micron-sized noble metals in sulfides, such as arsenopyrite, pyrite, stibnite and other minerals. Options for the processing method of refractory sulfide gold ores of pyrrhotite-arsenopyrite-pyrite-berthierite-stibnite composition include operations related to each other in the production process, namely: ore preparation of gold-bearing ore with an antimony content of more than 0.6% and a pyrrhotite/pyrite ratio of less than 1.1 or more than 1.1, hydrocyclonation with the separation of sands and drainage, the formation of a total flotation concentrate from flash flotation concentrates, a flotation concentrate obtained from flotation enrichment of the discharge using injection-type flotation machines, bacterial oxidation of the total flotation concentrate, grinding, magnetic separation, processing of magnetic and non-magnetic fractions, hydrometallurgical processing, centrifugation with the addition of flocculants and separation of cake and centrate, processing of them and flotation tailings, cyanidation followed by sorption leaching using cyanide solutions and synthetic sorbents - anion exchange resin and carbon sorbents - activated carbon, neutralization of centrate centrifugation and biocake, dehydration operations, thickening, washing, filtration with the separation at these stages of processing of solid residues - cakes and the liquid phase and their processing with the extraction of gold, antimony, gold-antimony commercial concentrate.
EFFECT: increase in the efficiency of processing refractory pyrrhotite-arsenopyrite-pyrite-berthierite-stibnite gold ores, expanding the scope of means for processing this type of ore.
6 cl, 2 dwg, 2 ex
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Authors
Dates
2023-11-08—Published
2023-08-30—Filed