Chemical reactions during iron reduction from oxides with hydrogen
https://doi.org/10.17073/0368-0797-2021-1-75-77
Abstract
Hydrogen is mainly used in the reduction annealing of iron powder obtained by spraying liquid metal by water. The chemical aspects of this process were modeled using the TERRA 6.3 software package. In particular, the Fe – O – H thermodynamic system has been analyzed in a wide range of temperatures and hydrogen consumption. The analysis has shown that the main impurity compounds of the sprayed powder will not be iron hydrates, but Fe2O3 oxide. But it cannot exist in the atmosphere of hydrogen and is converted to Fe3O4 oxide at a low temperature. Therefore, the main reaction for iron reduction will be Fe3O4 + 4H2 = 3Fe + 4H2O, which ends at 910 °C. It is shown that this reaction temperature can be significantly reduced with an equally significant increase in hydrogen consumption. Taking this factor into account can be useful when working out the powder annealing mode.
About the Authors
V. I. Berdnikov
LLC Industrial Company "Technology of Metals"
Russian Federation
Russian Federation
Viktor I. Berdnikov, Cand. Sci. (Eng.), Assist. Prof., Senior Researcher
63, Kosareva str., Chelyabinsk 454018
Yu. A. Gudim
South Ural State University
Russian Federation
Russian Federation
Yurii A. Gudim, Dr. Sci. (Eng.), Prof.
76, Lenina ave., Chelyabinsk 454080
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Review
For citations:
Berdnikov V.I., Gudim Yu.A. Chemical reactions during iron reduction from oxides with hydrogen. Izvestiya. Ferrous Metallurgy. 2021;64(1):75-77. (In Russ.) https://doi.org/10.17073/0368-0797-2021-1-75-77
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