感生电流对软接触结晶器内磁感应强度的影响  

Influence of Induced Current on Magnetic Flux Density in Soft-Contact Mold

作　　者：邓安元[1] 王恩刚[1] 赫冀成[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第12期1149-1152,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究计划专项经费资助项目(2001AA337040);辽宁省青年人才基金资助项目(2205221004)

摘　　要：利用有限元程序对矩形坯电磁软接触连铸结晶器内的电磁场和感生电流分布进行了模拟计算,研究了频率、结晶器材质电导率、结晶器结构等参数对结晶器上感生电流和结晶器内磁感应强度的影响以及感生电流对结晶器内磁场的影响.计算结果表明:电磁软接触连铸结晶器分瓣体上的感生电流产生的磁场对结晶器内部的磁场有十分重要的影响,合理利用感生电流可以增大结晶器内部的磁感应强度,达到节约能源的目的.在一定的频率段范围内,感生电流产生的磁场能增大结晶器内的磁感应强度,而超出这个范围,感生电流对结晶器内磁场的影响不够明显.在高频条件下,结晶器内的磁感应强度主要以外部线圈产生的磁场的透入为主;而频率较低时,有必要充分考虑和利用感生磁场对内部磁场的增强作用.FEM is used to simulate numerically the magnetic flux density and induced current distribution in a rectangular softcontact electromagnetic continuous casting （EMCC） mold. Investigates the influences of such parameters as power frequency, electric conductivity of mold material and mold construction on the magnetic flux density and induced current, as well as the effect of induced current on the magnetic flux density in the mold. The simulative results show that the magnetic flux density due to induced current formed on mold segment affects greatly the magnetic flux density in mold, and utilizing reasonably the induced current can enhance the magnetic flux density in mold so as to save energy. For slit mold, within a certain frequency band, the magnetic flux density due to induced current can enhance the magnetic flux density in mold, but, if the frequency is beyond the band, the enhancement is not obvious. In the high-frequency EMCC process, the magnetic flux density in mold mainly comes out of the penetration of magnetic flux density due to the induction of outer coil, while in case of low frequency how to utilize fully the induced or secondary field to enhance the magnetic field in mold should be taken into account.

关 键 词：结晶器 连铸 磁感应强度 感生电流 软接触 

分 类 号：TF777[冶金工程—钢铁冶金]