Metals Recovery From Molybdenite Concentrate by Electrooxidation and Leaching

Rasulova, Sitorabonu; Guro, V. P.; Safarov, E. T.; Adinaev, X. F.

doi:10.1088/1757-899x/848/1/012076

Cited by 6 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the solution was acidified, MoO3•(H2O)x precipitated (together with Re). The low emission of chlorine made it possible to consider the process environmentally friendly, and the leaching of Mo concentrate [15] is the result of its interaction with chlorine, and not with the anode current. However, Mocake, sharply depleted in Mo, is more attractive only as a gold-bearing raw material, for which it is expedient to replace Na2CO3, as a Mo(VI) leaching agent, with HCl, as an agent leaching Au 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Processing of Cake of Molybdenum Mining and Metallurgical Production by Electrooxidation in Chloride-Containing Solutions

RASULOVA,

GURO,

IBRAGIMOVA

et al. 2023

METAL Conference Proeedings

View full text Add to dashboard Cite

One of the types of technogenic metal-containing raw materials of Almalyk MMC JSC (Uzbekistan) is waste processing of molybdenite concentrate of previous years, based on nitric acid opening of sulfide concentrate: cakes stored in the tailings of the plant, allowing to some extent to increase the output of the plant's main products. In their composition, wt%: 4.1 Mo; 2.0 Fe, 3.87 S, 78.98 SiO2, 5.26 CaO,. Purpose: development of technology for the extraction of Mo. Au, other components from molybdenum cakes by electrooxidation in hydrochloric acid medium. Interest in the method is caused by the modernization of hydrometallurgical technologies, due to the increase in environmental requirements for them, and also due to the emergence of new hydrometallurgical equipment. We used a two-chamber electrolysis plant for Mo-cake leaching, with a membrane, a direct current source, 20 A, generating active chlorine: hypochlorite ions at the anode. Mo(VI), Аu(III), Cu(II) ions were analyzed by photocolorimetric and spectrometric methods (ICP -Agilent 7500 IСP MS). The concentration of NaClO was determined according to the State Standard 18190-72, free chlorine was determined by titration with methyl orange. The behavior of gold in Mo-cake in contact with hypochlorite ions is considered. The oxidation of Mo cakes in a hydrochloric acid medium by hypochlorite ions generated anode at the anode has been studied, the parameters of their electrooxidation have been calculated, and the leaching products have been studied. The method of electrooxidation, in the presence of HCl, on the basis of 3-factor planning of the experiment, regression equations were obtained. Checking their adequacy, according to the Fisher criterion, by comparing the calculated and experimental data on the degree of extraction of these metals, showed the adequacy of the proposed process models. A technology for the electrooxidation of molybdenum cake has been developed, which is an alternative to the existing scheme of oxidative roasting of molybdenite concentrate, followed by soda leaching of molybdenum from the cinder, with cyanide processing of cake for gold. It has been established that the electrooxidation of Mo-cakes makes it possible to process them efficiently, with through extraction of gold up to 90%, molybdenum -up to 72.6%.

show abstract

Section: Introductionmentioning

confidence: 99%

Processing of Cake of Molybdenum Mining and Metallurgical Production by Electrooxidation in Chloride-Containing Solutions

RASULOVA,

GURO,

IBRAGIMOVA

et al. 2023

METAL Conference Proeedings

View full text Add to dashboard Cite

show abstract

“…Previously, in the production of molybdenum compounds by Research and Production Association for the Production of Rare Metals and Hard Alloys (RPA PRM&HA) of "Almalyk MMC" JSC (former UZKTJM), Uzbekistan, the method of nitric acid opening of molybdenite concentrate (MoC) was used, replaced due to the increased environmental requirements for the process by the scheme of ammonia, then soda leaching middling cinder after molybdenite concentrate oxidative roasting [1][2]. In view of the improvement of technologies and equipment, an interest in hydro-oxidative methods application revived, such as generated hypochlorite [3] or nitric acid in autoclave [4] processing. However, the latest method is ineffective.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the Reagent Oxidation of Molybdenum Disulfide by Nitric Acid

RASULOVA,

GURO,

IBRAGIMOVA

et al. 2023

METAL Conference Proeedings

View full text Add to dashboard Cite

In the production of molybdenum compounds, JSC "Almalyk MMC" (Republic of Uzbekistan), for a long time used the method of nitric acid opening of raw material, replaced by the scheme of ammonia, then soda leaching of the cinder of the industrial product of molybdenum after oxidative roasting. In view of the improvement of technologies and equipment, there is an interest in environmentally friendly hydro-oxidative methods for their processing based on a strong oxidizer. Molybdenum disulfide in the composition of molybdenite concentrate is subject to surface passivation under the oxidizing conditions of processing the cinder of an industrial molybdenum product. The use of a strong oxidizing agent, nitric acid, makes it possible to overcome it in the hydrometallurgical process of oxidative leaching. The purpose of the study: to study the kinetics of the reaction of oxidative leaching of molybdenite concentrate of industrial production of molybdenum in nitric acid solutions, with the regeneration of nitric acid in them. Used samples of molybdenite concentrate,

show abstract

“…НПО АО «Алмалыкский ГМК» располагает собственным товарным рением, образуемом при переработке Мо-концентрата (Rasulova, S.N., Guro, V.P., Safarov, E.T., Adinaev, X.F., 2020). [1]. Целесообразно использовать его, наряду с ванадием, для легирования твердых сплавов, которые не удовлетворяют потребителя по своим эксплуатационным свойствам.…”

Section: Introductionunclassified

Alloying Hard Metals of Tungsten Carbide-Cobalt System with Vanadium and Rhenium to Improve Wear Resistance

У.Ш.

Ernazarov

Guro

2020

Challenges of Science

View full text Add to dashboard Cite

Vanadium and rhenium modified samples of hard alloy systems WC-VC-Co, WC-ReC-Co (grade VK-6) are considered when testing their wear resistance and hardness, in comparison with the serial alloy VK-6. The samples of the groups differed in the content of vanadium and rhenium, and additional purification of the raw material. The reason for the reduced wear resistance of the VK-6 alloy, caused by the structural features and the presence of impurities, is revealed. Sample test results: WC-VC-Co alloys in the VC concentration range of 1.0-16.0% by weight, turned out to be ≈ 3% harder and 30-90% more resistant to wear; WC-ReC-Co alloys, at a ReC concentration of 1-5% by weight, turned out to be ≈3% harder and 38.5% more resistant to wear; additional purification of the W-raw material of the WC-ReC-Co alloy with a ReC concentration of 5% by weight, in comparison with the alloys: VK-6 and VK-6 modified with 5% rhenium without additional purification, increased wear resistance from 38.5% (alloy "VK-6 modified with 5% rhenium"), up to 57.0% (single) and 65.3% (three times purification) alloy "VK-6 modified with 5% rhenium with additional purification". Experimental-industrial tests of products - surfacing on turning tools made of VK-6 alloy with VC 3% wt., Revealed that they were 30-35% more resistant to wear than samples from the serial VK-6 alloy, with an equal content cobalt; this means an increase in the resource of the tool by 30-35%. It was recommended to introduce alloying and additional purification of tungsten raw materials.

show abstract

Metals Recovery From Molybdenite Concentrate by Electrooxidation and Leaching

Cited by 6 publications

References 9 publications

Processing of Cake of Molybdenum Mining and Metallurgical Production by Electrooxidation in Chloride-Containing Solutions

Processing of Cake of Molybdenum Mining and Metallurgical Production by Electrooxidation in Chloride-Containing Solutions

Kinetics of the Reagent Oxidation of Molybdenum Disulfide by Nitric Acid

Alloying Hard Metals of Tungsten Carbide-Cobalt System with Vanadium and Rhenium to Improve Wear Resistance

Contact Info

Product

Resources

About