Solid-Phase Reduction and Iron Grain Growth in Red Mud in the Presence of Alkali Metal Salts
- Autores: Grudinskii P.1, Dyubanov V.1, Zinoveev D.1, Zheleznyi M.2
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Afiliações:
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
- National University of Science and Technology MISiS
- Edição: Volume 2018, Nº 11 (2018)
- Páginas: 1020-1026
- Seção: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172688
- DOI: https://doi.org/10.1134/S0036029518110071
- ID: 172688
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Resumo
The solid-phase carbothermic reduction and the iron grain growth in red mud are studied in the presence of sodium and potassium sulfates and carbonates. The influence of temperature and alkali metal salt additions on the reduction of iron is estimated by Mössbauer spectroscopy during experiments in a laboratory furnace in the temperature range 1000–1200°C. The calculation of the grain size in reduced metallic iron shows that the addition of alkali metal compounds to red mud promotes an increase in the grain size. The experimental data demonstrate that alkali metal sulfates more strongly affect the iron grain growth as compared to alkali metal carbonates. The proposed approach can be used to develop a process of recycling of red mud by solid-phase reduction followed by magnetic separation.
Sobre autores
P. Grudinskii
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Autor responsável pela correspondência
Email: GruPaul@yandex.ru
Rússia, Moscow, 119334
V. Dyubanov
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Autor responsável pela correspondência
Email: dyuba@imet.ac.ru
Rússia, Moscow, 119334
D. Zinoveev
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Autor responsável pela correspondência
Email: ZinoveevIMET@yandex.ru
Rússia, Moscow, 119334
M. Zheleznyi
National University of Science and Technology MISiS
Autor responsável pela correspondência
Email: markiron@mail.ru
Rússia, Moscow, 119049