Influence of power supply parameters on heating efficiency of blocking layer in electromagnetic induction-controlled steel teeming system

doi:10.13228/j.boyuan.issn1001-0963.20240109

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Journal of Iron and Steel Research ›› 2024, Vol. 36 ›› Issue (12) : 1530-1544. DOI: 10.13228/j.boyuan.issn1001-0963.20240109

Smelting and Working

Influence of power supply parameters on heating efficiency of blocking layer in electromagnetic induction-controlled steel teeming system

LI Yang^1,2, HE Ming^1,3, MU Wangzhong^1,4, ZHAO Lijia¹, TIAN Chen¹, WANG Qiang¹

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Abstract

Control of non-metallic inclusion is the core issue in the quality control process for producing high-quality steel products. During the continuous casting process, ladle filler sand is used to isolate the liquid steel and the slide plate, serving the functions of automatic teeming and protecting the slide plate. However, it also introduces a large amount of exogenous non-metallic inclusions into the liquid steel. Electromagnetic induction controlled automated steel teeming (EICAST) replaces the traditional application of filler sand in the ladle tapping process, thus avoiding the secondary contamination during continuous casting and providing a novel approach to improving the cleanliness of the liquid steel. The application of EICAST technology requires the adjustment of various process parameters, among which the selection and configuration of power supply parameters are crucial for improving the heating efficiency and achieving the automatic teeming for ladle treatment. The current work utilizes a simulation-based methodology coupling the multiple physical fields including electromagnetic field, temperature field, and solid-liquid phase transition, to investigate the influence of different power supply parameters on the heating efficiency of the blocking layer. The obtained results indicate that a minimum current of 550 A is required to achieve a 1 mm critical melting width at a specific frequency of 200 kHz. Based on the obtained results, the exploration of the nonlinear matching relationship among parameters likecurrent intensity, frequency, etc., can be extended to a general longitudinal magnetic flux induction heating model. It indicates the mechanism of electromagnetic induction heating and clarifies the interrelationships among different power supply parameters, laying the foundation for the further widespread application of EICAST in the steel industry.

Key words

clean steel / ladle teeming / induction heating / electromagnetic drainage / multiphysics field coupling / non-metallic inclusion

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LI Yang, HE Ming, MU Wangzhong, ZHAO Lijia, TIAN Chen, WANG Qiang. Influence of power supply parameters on heating efficiency of blocking layer in electromagnetic induction-controlled steel teeming system[J]. Journal of Iron and Steel Research, 2024, 36(12): 1530-1544 https://doi.org/10.13228/j.boyuan.issn1001-0963.20240109

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