Mechanism and kinetics of iron extraction from high silica boehmite–kaolinite bauxite by hydrochloric acid leaching

VALEEV, D.; PANKRATOV, D.; SHOPPERT, A.; SOKOLOV, A.; KASIKOV, A.; MIKHAILOVA, A.; SALAZAR-CONCHA, C.; RODIONOV, I.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 декабря 2021 г.

Авторы: VALEEV Dmitry, PANKRATOV Denis, SHOPPERT Andrei, SOKOLOV Artem, KASIKOV Alexandr, MIKHAILOVA Alexandra, SALAZAR-CONCHA Cristian, RODIONOV Ilia
Журнал: Transactions of Nonferrous Metals Society of China (English Edition)
Том: 31
Номер: 10
Год издания: 2021
Издательство: Nonferrous Metals Society of China/Zhongguo Youse Jinshu Xuehui
Местоположение издательства: China
Первая страница: 3128
Последняя страница: 3149
DOI: 10.1016/s1003-6326(21)65721-7
Аннотация: The chemical and mineral compositions of bauxite recovered from the Severoonezhsk Bauxite Mine (Arkhangelsk region, Russia) were studied by XRD, ICP-OES, TG/DSC, SEM, TEM, and Mössbauer spectroscopy. The iron-containing minerals of the bauxites were found to comprise alumogoethite (α-Fe1–xAlxOOH), alumohematite (α-(Fe1–xAlx)2O3), alumoakaganeite (β-Fe1–xAlxO(OH,Cl)), and chromite (FeCr2O4). The efficiency of Fe extraction from the bauxite by HCl leaching was 82.5% at 100 °C, HCl concentration of 10%, solid/liquid ratio of 1:10, and the process duration of 60 min, with aluminum loss from the bauxites below 4.5% of the total Al contents in the bauxite. Analysis of the kinetics of the iron leaching process proved diffusion to be the limiting stage of the process at 90–100 °C. Bauxite residue after leaching presented traces of α-Fe1–xAlxOOH and β-Fe1–xAlxO(OH,Cl), and most of the iron content was in the FeCr2O4. In bauxite residue after HCl leaching, in addition to iron oxide, the contents of chromium and calcium oxides significantly decreased. The iron chloride liquor after leaching contained the rare earth elements (REE) of 6.8 mg/L Sc, 4.1 mg/L Ce and 2.3 mg/L Ga.
Добавил в систему: Панкратов Денис Александрович

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Mechanism and kinetics of iron extraction from high silica boehmite–kaolinite bauxite by hydrochloric acid leachingстатья

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