Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101336
Title: Hydrothermal Resource-saving Processes in Complex Processing of Bauxite and Red Mud
Authors: Pasechnik, L. A.
Yatsenko, S. P.
Skachkov, V. M.
Bibanayeva, S. A.
Issue Date: 2020
Publisher: Knowledge E
Citation: Pasechnik, L. A., Yatsenko, S. P., Skachkov, V. M., Bibanayeva, S. A. (2020). Hydrothermal Resource-saving Processes in Complex Processing of Bauxite and Red Mud. KnE Materials Science, 6(1), 383–390. https://doi.org/10.18502/kms.v6i1.8114
Abstract: The Bayer bauxite residue (red mud, RM) is environmentally hostile and hazardous to human health. Red mud can be viewed as an important and promising source of scandium, yttrium, zirconium and other elements rather than a solid waste. Due to a high content of iron in bauxites and especially in RM, the conversion of hematite into magnetite in Bayer liquor plays a key role in the exploration of a cleaner technology of alumina production. Thus, RM and raw bauxite were used for hydrothermal digestion in an original one-stage method of magnetite production during co-recovery of alumina. The yield of alumina reaches 80% from RM and more from bauxites during digestion with addition of lime and Fe(II) or Fe . The saturation magnetization of a bulk sample of magnetized bauxite is 40.5 emu/g, two orders of magnitude higher than that of a raw red mud sample. Moreover, magnetite containing a residue has a high crystallinity, which contributes to better deposition and magnetic separation in the development of an overall flowsheet for RM utilization.
Keywords: RED MUD
BAUXITE
HYDROTHERMAL TREATMENT; ENRICHMENT
EXTRACTION
MAGNETIZATION
HEMATITE
MAGNETITE
RARE ELEMENTS
URI: http://hdl.handle.net/10995/101336
Access: Creative Commons Attribution License
License text: https://creativecommons.org/licenses/by/4.0/
Conference name: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” (TECHNOGEN 2019)
Conference date: 18.06.2019-21.06.2019
RSCI ID: 44730704
ISSN: 2519-1438
DOI: 10.18502/kms.v6i1.8114
metadata.dc.description.sponsorship: We thank Prof. D. G. Kellerman for her assistance with magnetic measurements. Thework was carried out in accordance with the state assignment for the ISSC UB RAS.
Origin: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” (TECHNOGEN 2019). — Ekaterinburg, 2020
Appears in Collections:Междисциплинарные конференции, семинары, сборники

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