MgO·Al2O3 spinel inclusion (from here, “Mg–Al inclusion”) is harmful to the properties of steel products. Many efforts have been made to control the composition of harmful inclusions during ladle treatment where the complex reactions among molten steel, slag, refractory, deoxidation products and alloying elements occur simultaneously. It is well known that the pure Al2O3 inclusion changes to Mg–Al inclusion because of the reaction with Mg content in molten steel. In the present work, in order to predict inclusion evolution from Al2O3 inclusion to Mg–Al inclusion, we have introduced the kinetic model that applies Mg content changes in spinel. By the brushed-up model, the influence of Cr content in steel and slag composition on the behaviors of Mg–Al inclusion has been investigated.
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The authors would like to thank Prof. Shin-ya Kitamura in Tohoku University for his valuable comments about the kinetic reaction and thermodynamics. This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20172010106310). And this work was performed under the Cooperative Research Program of “NJRC Mater. & Dev.”
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Kim, J., Kim, S. Influence of Cr Content in Steel on the Behavior of MgO·Al2O3 Spinel Inclusions During Ladle Treatment by Using Kinetic Reaction Model. Trans Indian Inst Met (2020). https://doi.org/10.1007/s12666-020-02006-7
- Ladle treatment
- Coupled reaction
- MgO·Al2O3 spinel inclusion
- High-Cr-containing steel