Abstract
The reduction of Fe3O4 to Fe is accomplished in two stages. In order to understand the reduction mechanism of magnetite cold bond pellets during the first period of heating-up process, it is necessary to study the kinetics of the reaction. In this work, the first stage of reduction of magnetite cold bond pellets, that is the reduction from Fe3O4 to FeO, has been investigated using an isothermal thermogravimetric method. Isothermal experiments were carried out at 750°C, 800°C, 850°C and 900°C, respectively. The results showed that the reaction was controlled by chemical reaction below 800°C, whereas, at higher temperature, it was controlled by a mixed controlled mechanism of chemical reaction and Ginstling-Brounshtein diffusion as well.
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Project supported by the Nonferrous Metals Industrial Corporation of China
Synopsis of the author Chen Qiyuan, professor, born in 1948. Major research fields: metallurgical thermodynamics and kinetics.
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Chen, Q., Zhou, H., Zhang, P. et al. Isothermal kinetics of the first stage reduction of magnetite cold bond pellets with carbon monoxide. J Cent. South Univ. Technol. 5, 1–3 (1998). https://doi.org/10.1007/s11771-998-0020-0
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DOI: https://doi.org/10.1007/s11771-998-0020-0