Synthetic Sulfide Concentrate Dissolution Kinetics in HNO3 Media
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Synthetic Sulfide Concentrate Dissolution Kinetics in HNO3 Media
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| Автор |
Dizer, O.
Karimov, K. Kritskii, A. Rogozhnikov, D. |
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| Тематика |
CATALYST
CHALCOPYRITE GALVANIC COUPLING ION CONCENTRATION KINETICS LEACHING MECHANISM NITRIC ACID PYRITE SPHALERITE SULFIDE MINERALS TENNANTITE CATALYSTS COPPER COMPOUNDS DISSOLUTION II-VI SEMICONDUCTORS INTEGRAL EQUATIONS MIXTURES NITRIC ACID ORGANIC ACIDS PYRITES ZINC SULFIDE CHALCOPYRITE DISSOLUTION KINETICS FE 3+ GALVANIC COUPLING ION CONCENTRATIONS PARTICLE MIXTURES SPHALERITE SULFIDE CONCENTRATES TENNANTITE ]+ CATALYST KINETICS |
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| Описание |
The nature of tennantite (Cu12As4S13), chalcopyrite (CuFeS2) and sphalerite (ZnS) particles’ mixture dissolution in nitric acid (HNO3) media was investigated in this study. The effects of temperature (323–368 K), HNO3 (1–8 mol/L) and Fe3+ (0.009–0.036 mol/L) concentrations, reaction time (0–60 min) and pyrite (FeS2) additive (0.5/1–2/1; FeS2/sulf.conc.) on the conversion of the minerals were evaluated. It has been experimentally shown that the dissolution of the mixture under optimal conditions (>353 K; 6 mol/L HNO3; FeS2/synt. conc = 1/1) allows Cu12As4S13, CuFeS2 and ZnS conversion to exceed 90%. The shrinking core model (SCM) was applied for describing the kinetics of the conversion processes. The values of Ea were calculated as 28.8, 33.7 and 53.7 kJ/mol, respectively, for Cu12As4S13, CuFeS2 and ZnS. Orders of the reactions with respect to each reactant were calculated and the kinetic equations were derived to describe the dissolution rate of the minerals. It was found that the interaction between HNO3 solution and Cu12As4S13, CuFeS2 and ZnS under the conditions investigated in this are of a diffusion-controlled nature. Additionally, the roles of Fe(III) in the initial solution and FeS2 in the initial pulp as catalysts were studied. The results indicated that the increase in Fe3+ concentration significantly accelerates the dissolution of the mixture, while the addition of FeS2 forms a galvanic coupling between FeS2, and Cu12As4S13 and CuFeS2, which also accelerates the reaction rate. The results of the study are considered useful in developing a hydrometallurgical process for polymetallic sulfide raw materials treatment. © 2022 by the authors.
Ministry of Education and Science of the Russian Federation, Minobrnauka The research funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program) is gratefully acknowledged. |
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| Дата |
2024-04-08T11:06:06Z
2024-04-08T11:06:06Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Dizer, O, Karimov, K, Kritskii, A & Rogozhnikov, D 2022, 'Synthetic Sulfide Concentrate Dissolution Kinetics in HNO3 Media', Materials, Том. 15, № 22, 8149. https://doi.org/10.3390/ma15228149
Dizer, O., Karimov, K., Kritskii, A., & Rogozhnikov, D. (2022). Synthetic Sulfide Concentrate Dissolution Kinetics in HNO3 Media. Materials, 15(22), [8149]. https://doi.org/10.3390/ma15228149 1996-1944 Final All Open Access; Gold Open Access; Green Open Access https://www.mdpi.com/1996-1944/15/22/8149/pdf?version=1668673362 https://www.mdpi.com/1996-1944/15/22/8149/pdf?version=1668673362 http://elar.urfu.ru/handle/10995/131276 10.3390/ma15228149 85142697495 000887415600001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
MDPI
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| Источник |
Materials
Materials |
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