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为了寻求更加有效的钢锭补缩技术,采用数值模拟方法研究了电磁补缩过程中矩形电磁冒口内部的磁场分布规律。结果表明,冒口内部磁感应强度在高度方向呈“两边小,中间大”的分布趋势。感应电流、电流频率、磁场作用位置等均对冒口内部磁场分布产生影响。为了在试验矩形冒口顶部获得稳定的热中心,电流控制在150~200A间,电流频率选择2000Hz,感应器底部与冒口底部距离控制在100~110mm之间,模拟值与实测值误差在10%以内,能够满足工程技术要求。
In order to seek a more effective technology of steel ingot compensation, the distribution of magnetic field inside the rectangular electromagnetic riser in the process of electromagnetic compensation was studied by numerical simulation. The results show that the magnetic flux density inside the riser tends to be “small on both sides and large in the middle” in the height direction. Induction current, current frequency, the role of the magnetic field position on the riser internal magnetic field distribution. In order to obtain a stable thermal center at the top of the test rectangle riser, the current is controlled between 150 and 200 A, the current frequency is selected at 2000 Hz, the distance between the bottom of the inductor and the bottom of the riser is controlled between 100 and 110 mm, and the error between the simulated value and the measured value is 10 %, To meet the engineering and technical requirements.