Abstract
The traditional stainless steel smelting process used O2 blowing to achieve decarbonization and chromium conversation . The increase of steel production is accompanied with an increase of CO2 emissions while CO2 has weak oxidation at high temperatures. The feasibility of using CO2 for stainless steel smelting in AOD furnaces and the effect of decarbonization and chromium conservation were verified by thermodynamic calculations in this paper. The theoretical calculations show that CO2 can completely replace O2 blowing which is convenient to control the progress of the reaction in the bath. The CO2 injection ratio should be controlled between 20 and 40%. High proportion of CO2 injection will not only make the molten pool temperature too low, but also extend the smelting cycle. In addition, the higher the CO2 jet flow, the higher the decarbonization rate in the middle and late stage of the smelting process.
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© 2019 The Minerals, Metals & Materials Society
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Wang, R., Yuan, Z., Yu, X. (2019). Thermodynamic Study on Substitution of CO2 for Ar or O2 in AOD Smelting Process. In: TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05861-6_9
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DOI: https://doi.org/10.1007/978-3-030-05861-6_9
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