Hydrometallurgy, том 215, номер публикации: 105994

Extraction of Al and rare earth elements via high-pressure leaching of boehmite-kaolinite bauxite using NH4HSO4 and H2SO4

Valeev D.
Shoppert A.
Dogadkin D.
Romashova T.
Kuz'mina T.
Salazar-Concha Cristian
Тип документаJournal Article
Дата публикации2023-01-22
ИздательElsevier
Название журналаHydrometallurgy
Квартиль по SCImagoQ1
Квартиль по Web of ScienceQ1
Импакт-фактор 20214.22
ISSN0304386X
Materials Chemistry
Metals and Alloys
Industrial and Manufacturing Engineering
Краткое описание
High-silica bauxite is not used to obtain sandy-grade alumina owing to its low alumina/silica ratio (μSi < 3). Acidic methods, such as the use of HCl and NH4HSO4, show promise for treating this raw material. The leaching of boehmite-kaolinite bauxite from the Severoonezhsk deposit mine (Arkhangelsk region, Russia) using a mixture of NH4HSO4 and H2SO4 was investigated for the first time. The bisulfate method, which combines the advantages of the acidic and alkaline methods, involves bauxite leaching, precipitation of ammonium alum, recrystallization for gibbsite precipitation, and calcination for alumina production. The effects of temperature (130–200 °C), liquid-to-solid ratio (8–12), and duration of leaching (5–90 min) on the degrees of extraction of Al, and rare earth elements (REEs) were evaluated. The extractions of Al, Fe, and Ga were found to be >90%, with most of the silica and titania remaining in the residue; moreover, a REEs extraction of 70%–80% was achieved. Residues obtained after leaching were studied by laser diffraction, XRD, XRF, and SEM to elucidate the leaching mechanism and the solubility of Al-containing minerals, such as boehmite (AlOOH), kaolinite (Al4[Si4O10](OH)8), and muscovite (KAl2[AlSi3O10](OH)2). The acquired data can be used to facilitate the development of an effective technology for the treatment of high-silica bauxite in Russia.
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1. Valeev D. и др. Extraction of Al and rare earth elements via high-pressure leaching of boehmite-kaolinite bauxite using NH4HSO4 and H2SO4 // Hydrometallurgy. 2023. Т. 215. С. 105994.
RIS |
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TY - JOUR

DO - 10.1016/j.hydromet.2022.105994

UR - http://dx.doi.org/10.1016/j.hydromet.2022.105994

TI - Extraction of Al and rare earth elements via high-pressure leaching of boehmite-kaolinite bauxite using NH4HSO4 and H2SO4

T2 - Hydrometallurgy

AU - Valeev, D.

AU - Shoppert, A.

AU - Dogadkin, D.

AU - Romashova, T.

AU - Kuz'mina, T.

AU - Salazar-Concha, Cristian

PY - 2023

DA - 2023/01

PB - Elsevier BV

SP - 105994

VL - 215

SN - 0304-386X

ER -

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@article{Valeev_2023,

doi = {10.1016/j.hydromet.2022.105994},

url = {https://doi.org/10.1016%2Fj.hydromet.2022.105994},

year = 2023,

month = {jan},

publisher = {Elsevier {BV}},

volume = {215},

pages = {105994},

author = {D. Valeev and A. Shoppert and D. Dogadkin and T. Romashova and T. Kuz{\textquotesingle}mina and Cristian Salazar-Concha},

title = {Extraction of Al and rare earth elements via high-pressure leaching of boehmite-kaolinite bauxite using {NH}4HSO4 and H2SO4},

journal = {Hydrometallurgy}

}

MLA
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Valeev, D., et al. “Extraction of Al and Rare Earth Elements via High-Pressure Leaching of Boehmite-Kaolinite Bauxite Using NH4HSO4 and H2SO4.” Hydrometallurgy, vol. 215, Jan. 2023, p. 105994. Crossref, https://doi.org/10.1016/j.hydromet.2022.105994.