Sulfidizing steam roasting application in oxidized plumbiferous ores processing circuits

Antropova, I. G.; Dambaeva, A. Yu.; Danzheeva, T. Zh.

doi:10.17580/or.2016.06.01

Cited by 2 publications

(1 citation statement)

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“…Processing of persistent gold-containing raw materials is carried out according to technologies based on the use of pre-oxidative roasting, autoclave and bacterial oxidation, ultrafine grinding with subsequent cyanidation [12][13][14][15][16]. The most common method of opening fine gold associated with pyrite and arsenopyrite and implemented in the practice of processing resistant gold-containing raw materials is oxidative roasting [17,18]. In the pre-oxidation process, a porous structure of mineral complexes is formed, which promotes the penetration of cyanide solutions.…”

Section: Introductionmentioning

confidence: 99%

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: 99%

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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Processing of Oxidized Lead–Zinc Ore by Co-Roasting with Pyrite-Bearing Ore

Antropova,

Gulyashinov,

Budaeva

et al. 2024

Minerals

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The world reserves of oxidized lead–zinc ores are large, but their processing faces significant difficulties due to their refractory nature. This paper presents a novel approach to the preparation of refractory oxidized lead ores for flotation. The proposed method is based on the co-roasting of oxidized lead-bearing ores from the Ozernoye polymetallic deposit (Western Transbaikalia, Russia) with fine-grained sulfide lead–zinc ore sourced from the same deposit and the addition of calcium oxide. This method allows for the activation of mineral complexes, the sulfidation of oxidized lead–zinc minerals, and the minimization of the amount of sulfur dioxide gas emitted. Co-roasting oxidized lead–zinc ore with sulfide ore (10–30 wt. pct) at 650–700 °C has been shown to result in the selective oxidation of pyrite and sulfidation of oxidized lead and zinc minerals. The proposed method of processing polymetallic ores is capable of simultaneously involving not only oxidized lead–zinc ores but also refractory sulfide ores, thereby extending the operational lifespan of the mining enterprise and reducing the environmental impact.

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Sulfidizing steam roasting application in oxidized plumbiferous ores processing circuits

Cited by 2 publications

References 0 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

Processing of Oxidized Lead–Zinc Ore by Co-Roasting with Pyrite-Bearing Ore

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