High-Iron Bauxite Residue (Red Mud) Valorization Using Hydrochemical Conversion of Goethite to Magnetite
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
High-Iron Bauxite Residue (Red Mud) Valorization Using Hydrochemical Conversion of Goethite to Magnetite
|
|
| Автор |
Shoppert, A.
Valeev, D. Diallo, M. M. Loginova, I. Beavogui, M. C. Rakhmonov, A. Ovchenkov, Y. Pankratov, D. |
|
| Тематика |
AL-GOETHITE
ALKALI LEACHING CONVERSION DISPOSAL HIGH-IRON WASTE MAGNETITE RED MUD ALUMINA ALUMINUM ALUMINUM OXIDE EXTRACTION HEMATITE IRON LEACHING MOLAR RATIO SODIUM COMPOUNDS STEELMAKING SULFUR COMPOUNDS WASTE DISPOSAL AL-GOETHITE ALKALI LEACHING BAUXITE RESIDUE CONVERSION DISPOSAL HIGH-IRON WASTE HYDROCHEMICALS IRON WASTE RED MUD VALORISATION MAGNETITE |
|
| Описание |
Bauxite residue (BR), also known as red mud, is a byproduct of the alumina production using the Bayer process. This material is not used to make iron or other iron-containing products worldwide, owing to its high content of sodium oxide and other impurities. In this study, we investigated the hydrochemical conversion of goethite (FeOOH) to magnetite (Fe3O4) in high-iron BR from the Friguia alumina refinery (Guinea) by Fe2+ ions in highly concentrated alkaline media. The simultaneous extraction of Al and Na made it possible to obtain a product containing more than 96% Fe3O4. The results show that the magnetization of Al-goethite and Al-hematite accelerates the dissolution of the Al from the iron mineral solid matrix and from the desilication product (DSP). After ferrous sulfate (FeSO4·7H2O) was added directly at an FeO:Fe2O3 molar ratio of 1:1 at 120 °C for 150 min in solution with the 360 g L−1 Na2O concentration, the alumina extraction ratio reached 96.27% for the coarse bauxite residue size fraction (Sands) and 87.06% for fine BR obtained from red mud. The grade of iron (total iron in the form of iron elements) in the residue can be increased to 69.55% for sands and 58.31% for BR. The solid residues obtained after leaching were studied by XRD, XRF, TG-DTA, VSM, Mössbauer spectroscopy, and SEM to evaluate the conversion and leaching mechanisms, as well as the recovery ratio of Al from various minerals. The iron-rich residues can be used in the steel industry or as a pigment. © 2022 by the authors.
VSM, (FEUZ-2021-0017) XRF, (FMUS-2019-24) Russian Science Foundation, RSF, (22-29-01515) Lomonosov Moscow State University, MSU, (122030200324-1) This research was funded by RSF (grant number 22-29-01515). The SEM-EDS, VSM, and XRD analyses were funded by the Project of the State Assignment, FEUZ-2021-0017. The methods used to determine the chemical composition of BR, sand, and leaching residues by XRF and ICP-MS (see Section 2.3. “Chemical composition of samples”) were funded by the Project of the State Assignment (Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, № FMUS-2019-24). Mössbauer analysis was performed in accordance with the state assignment of Lomonosov Moscow State University “Solving of problems of nuclear energy and environmental safety problems, as well as diagnostics of materials using ionizing radiation” (Project Reg. No. 122030200324-1). |
|
| Дата |
2024-04-08T11:06:08Z
2024-04-08T11:06:08Z 2022 |
|
| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
|
| Идентификатор |
Shoppert, A, Valeev, D, Diallo, MM, Loginova, I, Beavogui, MC, Rakhmonov, A, Ovchenkov, Y & Pankratov, D 2022, 'High-Iron Bauxite Residue (Red Mud) Valorization Using Hydrochemical Conversion of Goethite to Magnetite', Materials, Том. 15, № 23, 8423. https://doi.org/10.3390/ma15238423
Shoppert, A., Valeev, D., Diallo, M. M., Loginova, I., Beavogui, M. C., Rakhmonov, A., Ovchenkov, Y., & Pankratov, D. (2022). High-Iron Bauxite Residue (Red Mud) Valorization Using Hydrochemical Conversion of Goethite to Magnetite. Materials, 15(23), [8423]. https://doi.org/10.3390/ma15238423 1996-1944 Final All Open Access; Gold Open Access; Green Open Access https://www.mdpi.com/1996-1944/15/23/8423/pdf?version=1669800315 https://www.mdpi.com/1996-1944/15/23/8423/pdf?version=1669800315 http://elar.urfu.ru/handle/10995/131281 10.3390/ma15238423 85143837255 000896203200001 |
|
| Язык |
en
|
|
| Связанные ресурсы |
info:eu-repo/grantAgreement/RSF//22-29-01515
|
|
| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
|
| Формат |
application/pdf
|
|
| Издатель |
MDPI
|
|
| Источник |
Materials
Materials |
|