Abstract
Most steelmaking wastes contain a certain amount of CaO. To use these solid wastes, the effect of CaO in the preparation of Fe/FeAl2O4 by Fe2O3-Al2O3 electrolysis was thermodynamic analyzed. The results showed that CaO may react with Fe2O3 and Al2O3 to produce CaAl4O7, CaAl2O4, CaAl12O19, CaFe2O4, and Ca2Fe2O5 in the process of the experiment. The formation of CaAl4O7, CaAl2O4, CaAl12O19 can be inhibited by controlling the ratio of raw materials, and CaFe2O4, Ca2Fe2O5 can be electrolyzed by adjusting the electrolysis voltage. Combined with the calculation results, NaCl-KCl molten salt system was selected in this experiment. The mole ratio of NaCl to KCl was 1:1, and the optimal reaction temperature range was 800–900 ℃. The molar ratio of Al2O3 to Fe2O3 was 1:2. The range of the theoretical decomposition voltage was –1.05~−1.21 V. Under these experimental conditions, the presence of CaO will affect the preparation process, but it will not affect the produce of Fe/FeAl2O4 theoretically.
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**g, Z., Yan, H., Xu, Y., Li, H., Liang, J. (2022). Thermodynamic Analysis of CaO in the Preparation of Fe/FeAl2O4 by Fe2O3-Al2O3 Electrolysis. In: TMS 2022 151st Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92381-5_58
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DOI: https://doi.org/10.1007/978-3-030-92381-5_58
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