Reductive Smelting of Neutralized Red Mud for Iron Recovery and Produced Pig Iron for Heat-Resistant Castings
1
I.P. Bardin Laboratory for Problems of Metallurgy for Complex Ores, A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49, Leninsky Prospect, 119334 Moscow, Russia
2
Scientific Research Centre “Thermochemistry of Materials”, National University of Science & Technology “MISIS”, 4, Leninsky Prospect, 119049 Moscow, Russia
3
Laboratory of Physical Chemistry and Iron Ore Processing Technology, A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49, Leninsky Prospect, 119334 Moscow, Russia
4
Kuzbass State Technical University, Prokopyevsk affiliate, 19a, Nogradskaya street, 653033 Prokopyevsk, Russia
5
Department of Chemistry, Lomonosov Moscow State University, 1, Leninsky gory, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 32; https://doi.org/10.3390/met10010032
Received: 25 November 2019 / Revised: 11 December 2019 / Accepted: 20 December 2019 / Published: 23 December 2019
The chemical and mineral composition of the red mud from the Ural Aluminum Plant were studied by XRF, XRD, and Mössbauer spectroscopy. Experiments on reductive smelting of red mud were carried out in a range of temperatures (1650–1750 °C) to recover iron from the aluminum production waste with maximum efficiency. It was found that it is possible to obtain pig iron with a high content of titanium, phosphorus, and vanadium, and low sulfur content. The efficiency of iron recovery at 1750 °C was found to be around 98%. Thermodynamic calculations were carried out to assist in finding the optimal conditions for the process (e.g., carbon content, furnace temperature, slag liquidus temperature). It was also found that the pig iron phase obtained at 1650 to 1700 °C is not separated from the slag phase into ingot compared with the sample obtained at 1750 °C. Pig iron obtained at 1750 °C can be used to produce molds for the steel-casting equipment.
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Keywords:
red mud; Mössbauer spectroscopy; reductive smelting; thermodynamic modeling; slag; pig iron
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MDPI and ACS Style
Valeev, D.; Zinoveev, D.; Kondratiev, A.; Lubyanoi, D.; Pankratov, D. Reductive Smelting of Neutralized Red Mud for Iron Recovery and Produced Pig Iron for Heat-Resistant Castings. Metals 2020, 10, 32. https://doi.org/10.3390/met10010032
AMA Style
Valeev D, Zinoveev D, Kondratiev A, Lubyanoi D, Pankratov D. Reductive Smelting of Neutralized Red Mud for Iron Recovery and Produced Pig Iron for Heat-Resistant Castings. Metals. 2020; 10(1):32. https://doi.org/10.3390/met10010032
Chicago/Turabian StyleValeev, Dmitry; Zinoveev, Dmitry; Kondratiev, Alex; Lubyanoi, Dmitry; Pankratov, Denis. 2020. "Reductive Smelting of Neutralized Red Mud for Iron Recovery and Produced Pig Iron for Heat-Resistant Castings" Metals 10, no. 1: 32. https://doi.org/10.3390/met10010032
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