Study on Electromagnetic Stirring Parameter in Secondary Cooling Zone for Billet Continuous Caster
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摘要: 结合南京钢铁股份有限公司电炉厂方坯连铸机的生产实际,用数学模型初步计算凝固末端的坯壳厚度,在二次冷却区末端对铸坯进行射钉实验,利用射钉结果对数学模型进行修正。通过一定拉速下、一定钢种的温度场的计算,找出液芯为Ø35～Ø55mm的位置,确定将末端电磁搅拌器安装在距弯月面8m处。调整电磁搅拌的电流和频率,在冷态状态下测试末端电磁搅拌器不同位置处的磁感应强度,并计算不同电流和频率下的电磁力大小,从测试及计算结果确定电流为550 A,频率为13 Hz时的参数为最佳搅拌参数。Abstract: The thickness of solidified billet shell in secondary cooling zone was initial calculated by mathematics model and the pin-shooting situation was confirmed with the practical production situation of the continuous caster in EAF Steelmaking Plant of Nanjing Iron and Steel Co.Ltd.Crater end situation of Ø35～Ø55 mm was determined founded by calculation of modifying mathematics model making use of pin-shooting resulting in some casting speed and some steel grades and the F-EMS was fixed in the situation that is 8 m from the meniscus.The magnetic induction and electromagnetic force was measured under different electric current and frequency in different situation of the F-EMS in cold manner.Based on the measuring and calculating results,the optimal electromagnetic stirring parameters were confirmed,and the electric current was 550 A and frequency was 13 Hz.
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