RESEARCH OF GRAVITY CONCENTRATION OF THE GOLD PLACER OF EASTERN KAZAKHSTAN
Begalinov A. Shautenov M. Almenov T. Bektur B. Sakhipova K.
2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024Issue 317 - 34 pp.
A representative sample to test the concentration characteristics was taken from the Central Takyr section of the Tuzbak formation pebbles of the Eocene and gravel-sand formations. The gold content in – 80 + 2 mm pebbles was 0.37 g/t, in – 2+0 mm sands, 1.41 g/t. A process chart for processing a representative sample and a chain of devices for its implementation were developed. The selected sample of gold-bearing sands was examined with regard to its concentration characteristics using the method of “passive” and “active” gravity in a SV-500 screw separator and a vibrating centrifugal bowl-type unit developed at KazNRTU after K.I. Satpayev (Peregudov et al., 2021). Based on the study of the mineral composition of gold-bearing pebbles and the forms of occurrence of the useful component in them, their concentration characteristics were examined. A process chart for concentration and an aggregate technological installation for processing mineral samples were developed. The content of finely dispersed gold in gold-containing products was checked on the basis of thermal activation in a developed thermal activator (Peregudov et al., 2015). Gravity concentration of various fractions of natural sand samples pre-processed in an autogenous mill was done using a developed chain of devices consisting of a vibrating screw separator and centrifugal devices. The research was conducted with regard to gold recovery from gravity concentration tailings based on environmentally safe thiosulfate leaching. The effect of using a complex leaching solution (5) was most pronounced when leaching the gravity concentration tailings. According to the results of analyzes of productive solutions and residual solid sediments (cakes), gold recovery during the leaching amounted to 92.75–93.75%. The research results can be used to test samples of gold-bearing minerals with regard to their concentration characteristics using the gravity concentration method as well the hydrometallurgical method of processing concentrates.
autogenous mill , centrifugal bowl-type unit , concentrate , gold , gravity enrichment , pebbles , placer , sands , size class , tailings , vibrating screw separator
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Satbayev University, Almaty, Kazakhstan
Satbayev University
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