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以某厂φ210 mm圆坯结晶器电磁搅拌为研究对象,采用ANSYS有限元软件,建立了结晶器电磁搅拌电磁场-流场-温度场耦合数学模型,并进行求解。研究了磁场强度和电磁力在结晶器内钢液中的分布规律、电流强度和电源频率对磁场强度、电磁力以及结晶器内流场和温度场的影响规律。研究表明:结晶器内的磁感应强度和电磁力分布都呈边缘大、中间小的趋势;在电磁搅拌作用下,结晶器内钢液产生了旋转运动,形成了上回流、旋转区和下回流区,热区位置得到了提高;在所研究的搅拌参数范围内,随着电流强度和频率的增大,电磁力增大,钢液的流动速度也随之增大;根据工业试验结果,180A,4Hz的搅拌工艺参数应用效果较好。
Taking a Φ210 mm round billet mold electromagnetic stirrer of a factory as the research object, the mathematical model of electromagnetic field-flow field-temperature coupling of the mold electromagnetic stirring was established by ANSYS finite element software and solved. The influence of magnetic field strength and electromagnetic force in liquid steel in mold, current intensity and power frequency on magnetic field strength, electromagnetic force and flow field and temperature field in mold were studied. The results show that the magnetic induction and the distribution of electromagnetic force in the mold have the tendency of big edge and small middle. Under the action of electromagnetic stirring, the liquid steel in the mold has a rotating motion, forming the upper backflow, the rotating zone and the lower backflow zone , Hot zone location has been improved; in the range of stirring parameters studied, with the current intensity and frequency increases, the electromagnetic force increases, the flow rate of molten steel also increases; According to industrial test results, 180A, 4Hz stirring process parameters applied better.