Open Access
Applied Sciences (Switzerland), volume 12, issue 21, pages 11057
Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle
Publication type: Journal Article
Publication date: 2022-11-01
Journal:
Applied Sciences (Switzerland)
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 2.7
ISSN: 20763417
Computer Science Applications
Process Chemistry and Technology
General Materials Science
Instrumentation
General Engineering
Fluid Flow and Transfer Processes
Abstract
The decrease in the availability of high-quality bauxites makes the processing of high-silica raw materials inevitable, and in this regard, it is necessary to develop acid–salt methods suitable for these ores. The purpose of the work was to study various stages of the hydrosulfate method for processing alumina-containing raw materials on the example of nepheline concentrate in order to investigate the possibilities of their improvement. A. The distribution of various macro- and meso-components of leaching between phases at the stage of isolation of ammonium alum depending on sulfate concentration were experimentally and theoretically studied. It was shown that, with an increase in the total concentration of sulfate in the equilibrium mother liquor, the concentration of main impurity components, including iron, in a solid phase decreases significantly. To obtain relatively pure alum, it was recommended to use ammonium hydrosulfate with a concentration of at least 4 mol/L. B. Different embodiments for further purification of alum were explored. It was found that the use of the recrystallization process in the presence of small additions of sodium thiosulfate reduces the content of iron impurities in alum by almost an order of magnitude. C. A method for isolating purer final product was demonstrated. Isolation of ammonium aluminum carbonate hydroxide (ASACH), as a precursor of high-purity alumina, using ammonium bicarbonate is currently the most promising method in the hydrosulfate technology. In combination with the process of recrystallization, the preparation of AACH makes it possible to eliminate the need for expensive methods of selective sorption or extraction for deep purification of aqueous solutions of alum.
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Materials
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Materials
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
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Khamizov R. Kh., Zaitsev V. A., Gruzdeva A. N. Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle // Applied Sciences (Switzerland). 2022. Vol. 12. No. 21. p. 11057.
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Khamizov R. Kh., Zaitsev V. A., Gruzdeva A. N. Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle // Applied Sciences (Switzerland). 2022. Vol. 12. No. 21. p. 11057.
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TY - JOUR
DO - 10.3390/app122111057
UR - https://doi.org/10.3390%2Fapp122111057
TI - Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle
T2 - Applied Sciences (Switzerland)
AU - Khamizov, Ruslan Kh
AU - Zaitsev, Victor A
AU - Gruzdeva, Alexandra N
PY - 2022
DA - 2022/11/01 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 11057
IS - 21
VL - 12
SN - 2076-3417
ER -
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@article{2022_Khamizov,
author = {Ruslan Kh Khamizov and Victor A Zaitsev and Alexandra N Gruzdeva},
title = {Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle},
journal = {Applied Sciences (Switzerland)},
year = {2022},
volume = {12},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {nov},
url = {https://doi.org/10.3390%2Fapp122111057},
number = {21},
pages = {11057},
doi = {10.3390/app122111057}
}
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Khamizov, Ruslan Kh., et al. “Features of the Hydrosulfate Method for Processing Alumina-Containing Raw Materials in a Closed Reagent Cycle.” Applied Sciences (Switzerland), vol. 12, no. 21, Nov. 2022, p. 11057. https://doi.org/10.3390%2Fapp122111057.
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