Abstract
Controlling the heat flux at meniscus is one of the key aspects to prevent the formation of cracks during the continuous casting of crack-sensitive steel. This study investigated the influence of MgO addition on the performance of mold slag in the production of ultra-wide strand with a cross-section of 3000 mm × 150 mm. The main results indicated that when MgO increased from 0 to 8 wt%, the crystallization of slag film gradually decreased to 0% and then gradually increased. The break temperature and melting point also have the same change rule. When MgO was below 6 wt%, the O2− ionized from MgO destroyed the silicon-oxygen tetrahedron structure of the flux and inhibited crystallization. Conversely, magnesia alumina spinel would form in the flux. XRD results also confirmed these results. This study provided a new idea for the composition optimization of mold flux for continuous casting of large cross-section peritectic steel.
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© 2024 The Minerals, Metals & Materials Society
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Li, G., Wang, Q., He, S., Zhang, X. (2024). Effect of MgO on Crystallization Properties of Mold Flux for Ultra-wide Slab Peritectic Steel. In: Wagstaff, S., Anderson, A., Sabau, A.S., Iloeje, C. (eds) Materials Processing Fundamentals 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50184-5_9
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DOI: https://doi.org/10.1007/978-3-031-50184-5_9
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