The Synergistic Effect of Na2O on Hot Metal Desulfurization Kinetics in CaO-Na2O-SiO2-Al2O3-MgO Slag System
Vuolio, Tero; Visuri, Ville–Valtteri; Tähtilä, Henna; Pekuri, Pauli; Fabritius, Timo (2023-11-14)
Vuolio, Tero
Visuri, Ville–Valtteri
Tähtilä, Henna
Pekuri, Pauli
Fabritius, Timo
Elsevier
14.11.2023
Vuolio, T., Visuri, V., Tähtilä, H., Pekuri, P., & Fabritius, T. (2024). The synergistic effect of na2o on hot metal desulfurization kinetics in cao-na2o-sio2-al2o3-mgo slag system. Chemical Engineering Science, 284, 119525. https://doi.org/10.1016/j.ces.2023.119525
https://creativecommons.org/licenses/by/4.0/
© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202312113624
https://urn.fi/URN:NBN:fi:oulu-202312113624
Tiivistelmä
Abstract
An experimental and modelling study on hot metal desulfurization is considered. The study identifies the thermodynamic and kinetic factors that define the rate of permanent contact reaction in steady flow conditions. The study proceeds from defining the expressions for overall mass transfer rate of desulfurization and uses experimental data to identify the mass transfer coefficients. The study draws an estimate of the model parameter distributions using a real–coded genetic algorithm and a Metropolis Hastings’ algorithm. The results of this study and the literature data indicate that the Na2O content (5–20 wt–%) of the slag has a great potential for improving the desulfurization efficiency via the increase of the rate of the permanent contact reaction. The desulfurization efficiency increased 5 unit–% per unit–% increase in slags Na2O content (below 10 wt–%). This can be implied to potentially decrease the desulfurization reagent consumption in powder injection.
An experimental and modelling study on hot metal desulfurization is considered. The study identifies the thermodynamic and kinetic factors that define the rate of permanent contact reaction in steady flow conditions. The study proceeds from defining the expressions for overall mass transfer rate of desulfurization and uses experimental data to identify the mass transfer coefficients. The study draws an estimate of the model parameter distributions using a real–coded genetic algorithm and a Metropolis Hastings’ algorithm. The results of this study and the literature data indicate that the Na2O content (5–20 wt–%) of the slag has a great potential for improving the desulfurization efficiency via the increase of the rate of the permanent contact reaction. The desulfurization efficiency increased 5 unit–% per unit–% increase in slags Na2O content (below 10 wt–%). This can be implied to potentially decrease the desulfurization reagent consumption in powder injection.
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