Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed
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| Автор |
Shoppert, A.
Valeev, D. Alekseev, K. Loginova, I. |
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| Тематика |
AGGLOMERATION
ALUMINA BAUXITE BAYER PROCESS COARSE GIBBSITE SEEDED PRECIPITATION |
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| Описание |
The addition of active seed for increasing the precipitation rate leads to the formation of fine Al(OH)3 particles that complicates separation of solid from the mother liquor. In this study, the enhanced precipitation of coarse Al(OH)3 from sodium aluminate solution using active agglomerated seed was investigated. Aluminum salt (Al2(SO4)3) were used for active agglomerated seed precipitation at the initial of the process. About 50% of precipitation rate was obtained when these agglomerates were used as a seed in the amount of 20 g L−1 at 25 °C within 10 h. The agglomerated active seed and precipitate samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). SEM images showed that agglomerates consist of flake-like particles that can be stick together by bayerite (β-Al(OH)3) acting as a binder. The precipitation temperature above 35 °C and the high concentration of free alkali (αk = 1.645Na2Ok/Al2O3 > 3) lead to the agglomerates refinement that can be associated with the bayerite dissolution. © 2023 by the authors.
Russian Academy of Sciences, РАН: FMUS-2019-24 This research was funded by the Project of the State Assignment, FEUZ-2021-0017. The method used to determine the chemical composition of solutions by ICP-OES (see Section “Analysis”) were funded by the Project of the State Assignment (Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, No. FMUS-2019-24). |
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| Дата |
2024-04-05T16:16:59Z
2024-04-05T16:16:59Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Shoppert, A, Valeev, D, Alekseev, K & Loginova, I 2023, 'Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed', Metals, Том. 13, № 2, 193. https://doi.org/10.3390/met13020193
Shoppert, A., Valeev, D., Alekseev, K., & Loginova, I. (2023). Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed. Metals, 13(2), [193]. https://doi.org/10.3390/met13020193 2075-4701 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149251459&doi=10.3390%2fmet13020193&partnerID=40&md5=ee5db83cc960ce1989ce8c4d74ca4fba https://www.mdpi.com/2075-4701/13/2/193/pdf?version=1674984583 http://elar.urfu.ru/handle/10995/130254 10.3390/met13020193 85149251459 000940713600001 |
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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 |
Metals
Metals |
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