Extraction of Noble Metals from Pyrite Cinders

Kenzhaliyev, B. К.; Surkova, Tatiana; Yessimova, Dinara; Baltabekova, Zhazira; Abikak, Yerkezhan; Abdikerim, Bekzat; Dosymbayeva, Z D

doi:10.3390/chemengineering7010014

Cited by 8 publications

(9 citation statements)

References 10 publications

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“…(5) (6) (7) In accordance with equations 6, 7 [2,3], the distribution of the main hydrolysis products from TCCA in an aqueous solution at various pH values was revealed. As can be seen from Figure 1, when the pH value is greater than 7.5, the predominant hydrolysis products are CIO − ; when the pH value is from 3.5 to 7.5, the main type is HCIO; and the pH value is less than 3.5,2 Cl2 acts as the main oxidizing agent.…”

Section: Introductionmentioning

confidence: 55%

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Evalution of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Kenzhaliyev,

Tussupbayev,

Abdykirova

et al. 2024

Preprint

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The article presents the results of cyanide leaching of gold-containing concentrate using the trichlorocyanuric acid (TCCA) oxidizer. Gold-containing concentrate obtained from a gold tailings sample from a gold recovery factory (GRF) in one of the deposits of Kazakhstan that was not previously studied for concentrability. According to X-ray phase analysis and energy dispersive spectrometry (DSM) data, the main compounds in the tailings sample under study are: pyrite FeS2, quartz SiO2, calcite CaCO3, albite NaAlSi3O8, muscovite KAl2Si3AlO10(OH)8, dolomite CaMg(CO3)2, and oxidized iron compounds. Microscopic studies have established the presence of gold grains in free form, ranging in size from 0.9-10.2 mkm Au-ultrafine and fine gold. Obtaining a gold-containg concentrate with a gold content of 15.95 g / t is possible according to the enrichment scheme, which includes centrifugal separation, classification according to the fineness class -0.05 mm, additional grinding of hydrocyclone sands to a fineness of 90.0-95.0% of the class finer than 0.050 mm, and control centrifugal separation. Since pyrite in technogenic raw materials is the main gold-containing mineral, this paper presents studies on the oxidizability of pyrite with the TCCA oxidizer. The results of studies on the oxidation of pyrite using the TCCA oxidizer show that the products of its hydrolysis oxidize pyrite with the formation of various iron compounds on its surface. Pretreatment of gold-containing concentrate with oxidizer TCCA for 3 hours before the cyanidation process (20 hours) allows to increase the recovery of gold in the solution by 5.8 %.

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Section: Introductionmentioning

confidence: 55%

“…of raw materials [1][2][3]. Man-made dumps can often compete in terms of content and reserves with newly discovered deposits today.…”

Section: Introductionmentioning

confidence: 99%

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Evalution of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Kenzhaliyev,

Tussupbayev,

Abdykirova

et al. 2024

Preprint

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“…Therefore, the development of technologies for processing gold-containing technogenic raw materials is an urgent task for the gold mining industry. The progress in improving methods for extracting useful components allows us to consider man-made dumps as a very attractive source of raw materials [1][2][3]. Manmade dumps can often compete in terms of content and reserves with newly discovered deposits today.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Kenzhaliyev,

Tussupbayev,

Abdykirova

et al. 2024

Processes

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This article presents the results of cyanide leaching of gold-containing concentrate using the trichlorocyanuric acid (TCCA) oxidizer. Gold-containing concentrate was obtained from a gold tailings sample from a gold recovery factory (GRF) in one of the deposits of Kazakhstan that have not previously been studied for concentrability. According to X-ray phase analysis and energy dispersive spectrometry (DSM) data, the main compounds in the tailings sample under study are pyrite FeS2, quartz SiO2, calcite CaCO3, albite NaAlSi3O8, muscovite KAl2Si3AlO10(OH)8, dolomite CaMg(CO3)2, and oxidized iron compounds. Microscopic studies of the concentrate have established the presence of ultrafine gold with sizes from Au 0.9 to 10.2 μm in pyrite. Obtaining the gold-containing concentrate with a gold content of 15.95 g/t is possible according to the enrichment scheme, which includes centrifugal separation, classification according to the fineness class −0.05 mm, additional grinding of hydrocyclone sands to a fineness of 90.0–95.0% of the class finer than 0.050 mm, and control centrifugal separation. Since pyrite in technogenic raw materials is the main gold-containing mineral, this paper presents studies on the oxidizability of pyrite with the TCCA oxidizer. The results of studies on the oxidation of pyrite using the TCCA oxidizer show the products of its hydrolysis oxidize pyrite with the formation of various iron compounds on its surface. Pretreatment of gold-containing concentrate with oxidizer TCCA for 3 h before the cyanidation process (20 h) allows for an increase in the recovery of gold in the solution by 5.8%.

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“…Since the late 1980s, hydrometallurgical autoclave and bacterial dissection technologies have been gradually introduced into the preparatory process of processing goldcontaining raw materials [13,14]. Processes such as Albion, Leachox, etc., have also been proposed [15,16].…”

Section: Introductionmentioning

confidence: 99%

Study of the Cyanide Leaching of Gold from Low-Grade Raw Materials in the Presence of Amino Acids

Kenzhaliyev,

Surkova,

Koizhanova

et al. 2023

Inorganics

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The article discusses the interaction in amino acid–gold cyanide systems using amino acids of different structures. The formation of complex compounds of gold cyanide with amino acids with the participation of carboxyl and amino groups is shown. A relationship has been established between the formation of gold complexes with amino acids and the degree of its extraction in the process of leaching from low-grade ore with sodium cyanide together with amino acids: the higher the degree of participation of the amino group in the formation of the complex, i.e., covalent bond, the more pronounced the effect of the amino acid on the degree of gold leaching. The contribution to the formation of the complex of the carboxyl group (ionic bond) and the amino group (covalent donor–acceptor) can be assessed by the intensity of the band at a wave number of 1419 cm−1 of the IR spectra of the systems: gold cyanide–amino acid. This approach makes it possible to predict the effect of amino acid structure on gold recovery during cyanide leaching based on IR spectra.

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Extraction of Noble Metals from Pyrite Cinders

Cited by 8 publications

References 10 publications

Evalution of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Evalution of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Evaluation of the Efficiency of Using an Oxidizer in the Leaching Process of Gold-Containing Concentrate

Study of the Cyanide Leaching of Gold from Low-Grade Raw Materials in the Presence of Amino Acids

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