FEASIBILITY OF FLOTATION ENRICHMENT OF ORE OF FIELD SHIRALDZHIN
DOI:
https://doi.org/10.14529/met190101Keywords:
ore, mineral, gold, copper, flotation enrichment, extraction, concentrate, reagent regime, grinding stageAbstract
The article is devoted to the feasibility studies of flotation enrichment of the ore of
the Shiraldzhin deposit of the Kyrgyz Republic. A small review has been given on the processing of persistent gold-bearing raw materials, and the purpose of the studies is indicated. The results of analyzes of chemical and mineral compositions are presented, it is established that the ore belongs to
the oxidized type of hematite gold-bearing ores, is highly silicon, highly ferrous and moderately calcium with the presence of manganese and copper. The main metal concentrators are: for iron-hematite and goethite, for manganese-impurity of manganese in iron oxides and hydroxides. According to the distribution of copper in minerals, its content in minerals is determined: goethite, limonite, malachite, covellite, chalcopyrite. Gold in the ore is native, mostly finely divided, and there is also
a large gold. Phase analysis found that the main part of the ore is free gold in the form of octahedra, their intergrowths, as well as in dendritic form, gold in intergrowths with a clean surface. And
the amount of gold that can be extracted by enrichment processes is determined. Investigations of flotation enrichment of the ore being studied determined modifiers, collectors and their combinations, which give the best technological parameters, which were estimated by gold recovery,
the quality of the concentrate obtained and the kinetics of flotation. The optimal density was determined by studying the influence of pulp density on gold flotation. The result of open flotation experiments established the optimal fineness of grinding in the 1st and 2nd stages of grinding. According to the study of the morphology of gold minerals and their distribution in fineness in the obtained flotation concentrates after the 1st and 2nd stages of grinding, it is determined that after the 1st stage of grinding all the large gold that is absent in the flotation concentrate after the II stage of grinding is recovered.
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