Open Access
Minerals, volume 10, issue 6, pages 500
Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust
Publication type: Journal Article
Publication date: 2020-05-30
Geotechnical Engineering and Engineering Geology
Geology
Abstract
One of the potential sources of rare-earth elements (REE) is the industrial waste known as red mud (bauxite residue), in which the majority of REE from the initial bauxite are concentrated via the Bayer process. Therefore, the studies of the subject, both in Russia and outside, focus almost exclusively on red mud processing. This article looks into the possibility of REE concentration into red mud by leaching an intermediate product of the bauxite sintering process at Russian alumina refineries, namely electrostatic precipitator (ESP) dust. The experimental works were performed by X-ray diffraction (XRD)and electron probe microanalysis (EPMA) of the sinter and sinter dust. The determination of major and rare-earth elements in the sinter from the rotary kilns and in the ESP dust before and after leaching was carried out by X-ray fluorescence (XRF) and plasma mass spectrometry (ICP-MS). The study showed that it is possible to obtain red mud that contains three times more REE than traditional waste red mud after two-stage leaching ESP dust in the water at 95 °C followed by leaching in an alkaline-aluminate liquor at 240 °C. The shrinking core model was used to study the kinetics of leaching of the original ESP dust and water-treated dust in alkaline-aluminate liquor. The study showed the change in the limiting stage of the alkaline leaching process after water treatment, with the activation energy growing from 24.98 to 33.19 kJ/mol.
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Chaikin L. et al. Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust // Minerals. 2020. Vol. 10. No. 6. p. 500.
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Chaikin L., Shoppert A., Valeev D., Loginova I., Napolskikh J. Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust // Minerals. 2020. Vol. 10. No. 6. p. 500.
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TY - JOUR
DO - 10.3390/min10060500
UR - https://doi.org/10.3390%2Fmin10060500
TI - Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust
T2 - Minerals
AU - Chaikin, Leonid
AU - Shoppert, Andrei
AU - Napolskikh, Julia
AU - Loginova, Irina
AU - Valeev, Dmitry
PY - 2020
DA - 2020/05/30 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 500
IS - 6
VL - 10
SN - 2075-163X
ER -
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@article{2020_Chaikin,
author = {Leonid Chaikin and Andrei Shoppert and Julia Napolskikh and Irina Loginova and Dmitry Valeev},
title = {Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust},
journal = {Minerals},
year = {2020},
volume = {10},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {may},
url = {https://doi.org/10.3390%2Fmin10060500},
number = {6},
pages = {500},
doi = {10.3390/min10060500}
}
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Chaikin, Leonid, et al. “Concentration of Rare Earth Elements (Sc, Y, La, Ce, Nd, Sm) in Bauxite Residue (Red Mud) Obtained by Water and Alkali Leaching of Bauxite Sintering Dust.” Minerals, vol. 10, no. 6, May. 2020, p. 500. https://doi.org/10.3390%2Fmin10060500.
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