Abstract
The kinetic model of dephosphorization (De-P) based on the coupled reaction model by combination with the heat balance temperature model and the lime dissolution model was used for the De-P stage in the double slag converter steelmaking process. At the different De-P temperatures, 220-ton industrial experiments and 0.5-kg laboratorial experiments were conducted. The predicted results are consistent with both the industrial results and the laboratorial results. In industrial experiments, with increasing temperature, the P removal ratio increases first and then decrease with the highest P removal ratio at the temperature of 1664 K. The De-P rate increases rapidly at first, then decreases after reaching the peak. At the peak of the De-P rate, the value of interfacial oxygen activity also increases to the peak. The peak value of De-P rate decreases with the increase in temperature. The De-P is a first-order reaction with the activation energy of 241,992.3 J mol−1. The value of the mass transfer coefficient increases with the increasing temperature.
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This work is financially supported by the National Natural Science Foundation of China (Grant No. U1960202) and the Science and Technology Commission of Shanghai Municipality (No. 19DZ2270200).
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Zhang, R., Yang, J., Yang, W. et al. Kinetics of Dephosphorization in Double Slag Converter Steelmaking Process at Different Temperatures With Industrial Experiments and Laboratorial Experiments. Metall Mater Trans B 53, 3013–3024 (2022). https://doi.org/10.1007/s11663-022-02582-7
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DOI: https://doi.org/10.1007/s11663-022-02582-7