电磁搅拌技术在连铸中的应用

Application of electromagnetic stirring in continuous casting

电磁搅拌(EMS)技术在高效连铸冷却凝固过程中发挥着关键作用,能有效改善连铸坯的内外部缺陷。电磁搅拌技术利用洛伦兹力优化钢液流动,减少钢液流动不稳定性、保护渣卷入和表面缺陷,达到提高连铸坯质量的目的。为此,为了解EMS技术对连铸过程的影响,对连铸电磁搅拌技术的工作原理进行了简要概述,详细分析了结晶器电磁搅拌(M-EMS)、二冷区电磁搅拌(S-EMS)、凝固末端电磁搅拌(F-EMS)及电磁搅拌组合技术在连铸中的最新研究进展,并指出了其应用所面临的问题及改进思路。最后,对未来连铸电磁搅拌技术的发展趋势进行了展望。

Electromagnetic stirring(EMS)technology plays an important role in the cooling solidification process of molten steel for high efficiency continuous casting process,which can effectively improve the internal and external defects of continuous casting billets.Specifically,the EMS technology takes the benefit of the generation of Lorentz force to optimize the molten steel flow,so as to decrease flow instability,mold powder entrapment,and surface defects and the bloom quality is improved obviously.For this purpose,to gain a clear understanding of the effect of EMS technology on the continuous casting process,the principle of electromagnetic stirring is briefly expounded.Also,the latest research progress of mold electromagnetic stirring(M-EMS),secondary cooling zone electromagnetic stirring(S-EMS),final electromagnetic stirring(F-EMS)and electromagnetic stirring combination technology in continuous casting is analyzed in detail.The problems encountered in the application of electromagnetic stirring in continuous casting and the improvement ideas are pointed out.Finally,the future development trends of electromagnetic stirring are prospected.