Assessment of Refractory Gold-Bearing Ores Based of Interpretation of Thermal Analysis Data

Aleksandrova, T. N.; Heide, G.; Afanasova, A. V.

doi:10.31897/pmi.2019.1.30

Cited by 13 publications

(9 citation statements)

References 2 publications

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“…The obtained results supplement and develop the theory and practice of metallurgical processes of synthesis of new materials (based on iron and other metals) with improved properties, and also contribute to the modern research of the scientific school of metallurgists of Mining Institute (now the University) in St. Petersburg [38][39][40][41][42][43][44], at the origins of which was academician N.S. Kurnakov [21,24,45,46].…”

Section: Resultsmentioning

confidence: 66%

Dispersed iron obtaining by the method of solid state hydride synthesis and the problem of hydrophobiсity of metal

Syrkov¹,

Prokopchuk²

2021

cisisr

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The process of obtaining of a dispersed product based on metallic iron, containing a protective carbosiloxane film on the surface, has been investigated and implemented. The structure and composition of the metal product are characterized by modern physical methods, including X-ray phase and X-ray fluorescence analysis, XPS spectroscopy. The influence of the synthesis mechanism, the role of the metal-silicon chemical interaction in the surface layer on the water-repellent and anticorrosion properties of the obtained samples is considered. It was found that the heat resistance of the samples in air and their hydrophobicity, depending on the type of the reduced metal, increase in the order: nickel -copper -iron. It was shown that highly hydrophobic iron-based samples can be obtained by reduction from iron (II) oxide and Olenegorsk superconcentrate. The prospects of the synthesized powders and the method of their preparation for the creation of superhydrophobic materials are shown. A method for obtaining a metal product has been theoretically and experimentally substantiated, where the formation of a metal structure and its protection from an aggressive environment are carried out within a given volume on the same technological unit with a flow-through reactor.

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Section: Resultsmentioning

confidence: 66%

Dispersed iron obtaining by the method of solid state hydride synthesis and the problem of hydrophobiсity of metal

Syrkov¹,

Prokopchuk²

2021

cisisr

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“…Flotation test were conducted in the pheumomechnical flotation machine, with flotation cell volume of 0.2 L. Experimental conditions are based on the studies of the sulphide flotation [19,20]. Flotation was carried out with using potassium butyl xanthate in concentration of 120 g/t as the collector and solution of dextrin as a depressant in concentration of 80 g/t.…”

Section: Methodsmentioning

confidence: 99%

Flotation froth feature analysis using computer vision technology

et al. 2020

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The possibility of machine vision application in the field of flotation efficiency evaluation was studied. Algorithm for froth image analysis was developed with aim of obtaining bubble’s size distribution. Algorithm consists of two parts: image processing and object detection. Algorithm’s work was verified on the sulfide flotation froth. As result, mathematical correlations for air flow rate, mean bubble diameter and surface area bubble flux were established.

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“…Характер ассоциации золота в исследованных пробах руды месторождения при наличии свободного золота, извлекаемого амальгамацией (до 49 %) обуславливает целесообразность проведения исследований гравитационными методами обогащения [11,12]. Исследования выполнены с использованием концентрационного стола, центробежного сепаратора, а также с применением тяжелой жидкости для определения гравитационной контрастности [1].…”

Section: минеральный состав исследованных пробunclassified

“…Постановка проблемы. В настоящее время запасы россыпных месторождений золота существенно истощились, ухудшилась минерально-сырьевая база добываемого россыпного золота, а именно увеличилась доля трудноизвлекаемых фракций золота в исходном сырье [1][2].…”

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Studies of enrichment of sulfide and oxidized ores of gold deposits of the Aldan shield

Федотов

Сенченко²,

Федотов

et al. 2020

PMI

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The paper presents the analysis of studies of the enrichment of sulfide and oxidized ores in Yakutia deposits. The ore of the deposit is a mixture of primary, mixed and oxidized ores. The main useful component of the studied ore samples is gold with a content of 1.5 to 2.8 g/t, the silver content is low – 5-17 g/t. Ore minerals are represented by sulfides, among which pyrite predominates. The total sulfide content does not exceed 3-5 %. The presence in the ore of free and associated gold with a grain size from fractions of a micron to 1.5 mm. Gold is represented by nuggets in intergrowth with sulfides and also forms independent inclusions. Ores are classified as easily cyanidable. It was found that the content of amalgamable gold is 10-49, the share of cyanidable gold ranges from 66.67-91, the share of refractory gold is 9.0-33.33 %, which in absolute amount equals to 0.24-0.8 g/t. The extraction of gold in gravitation concentrate varies depending on the gold content in the ore and the yield of concentrate and for ores with a gold content of 1.5-2.8 g/t from 40 to 60 %. The direct cyanidation of all studied ore samples established the possibility of extracting gold into solution up to 86.7-92.9 %, the gold content in cyanidation cakes is 0.2-0.3 g/t. Investigations of the gravitation concentrate by the method of intensive cyanidation showed that with an initial gold content of ~ 500 g/t, up to 98.9 % is extracted into the solution. The gold content in intensive cyanide cakes will be 6-15 g/t. A set of studies carried out by the authors of the article at various institutes showed that it is advisable to process ore from the deposit using cyanidation technology with preliminary gravitational extraction of gold.

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Assessment of Refractory Gold-Bearing Ores Based of Interpretation of Thermal Analysis Data

Cited by 13 publications

References 2 publications

Dispersed iron obtaining by the method of solid state hydride synthesis and the problem of hydrophobiсity of metal

Dispersed iron obtaining by the method of solid state hydride synthesis and the problem of hydrophobiсity of metal

Flotation froth feature analysis using computer vision technology

Studies of enrichment of sulfide and oxidized ores of gold deposits of the Aldan shield

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