IF钢板坯结晶器电磁搅拌数值模拟与工艺实践  

Numerical simulation and Process Practice of Mold Electromagnetic Stirring for IF Steel Slab

作　　者：刘启龙[1] 邓勇[1] 李华刚[2] 韦如军 曹成虎[1] 张敏[1] Liu Qilong;Deng Yong;Li Huagang;Wei Rujun;Cao Chenghu;Zhang Min(No.4 Steelmaking and Rolling General Plant of Ma’anshan Iron&Steel Co.,Ltd.,Ma’anshan 243011,China;Intelligent Equipment Business Division of Shanghai BAOSIGHT Soft Co.,Ltd.,Shanghai 201099,China)

机构地区：[1]马鞍山钢铁股份有限公司第四钢轧总厂,马鞍山243011 [2]上海宝信软件股份有限公司智能装备事业部,上海201099

出　　处：《特殊钢》2023年第6期83-88,共6页Special Steel

摘　　要：针对高拉速IF钢铸坯夹杂与气泡缺陷封闭率偏高的问题,通过数值模拟研究了水口浸入深度和拉速对结晶器流场的影响,结果表明,在结晶器电磁搅拌电流为600 A、频率3.5 Hz工况下,随着拉速增高,自由液面活跃指数呈现先增大后减小再增大的趋势,在拉速1.05 m/min附近,最高达0.67,在1.6 m/min附近,最低达0.35,流场均匀性指数略有降低,最佳的自由液面活跃指数为0.5±0.05;当拉速低于1.0 m/min时,随着水口浸入深度的增加,自由液面活跃指数逐步增大至0.40,当拉速大于1.0 m/min时,随着水口浸入深度增加,自由液面活跃指数逐步降低,当拉速大于1.4 m/min时,随着水口浸入深度的增加,自由液面活跃指数大幅下降至0.37;IF钢结晶器电磁搅拌工艺优化后,铸坯夹杂与气泡缺陷封闭率均值下降4%,取得了显著的效果。In order to solve the problem of high sealing rate of inclusions and bubble defects in IF steel with high drawing speed,the effects of immersion depth and drawing speed on the flow field of mold were studied by numerical simulation.The results show that under condition of the electromagnetic stirring current intensity 600 A and frequency 3.5 Hz,with the casting speed increases,the active index of free liquid level shows a trend of first increasing,then decreasing and then increasing.At the casting speed about 1.05 m/min,max value is up to 0.67,at the casting speed about 1.6 m/min,the minimum value is 0.35,the flow-field uniformity index is slightly reduced,the best free liquid level active index is 0.5±0.05;When the casting speed is below 1.0 m/min,with the SEN immersion depth increases,the free liquid surface active index gradually increases to 0.40;When the casting speed is greater than 1.0 m/min,with the SEN immersion depth increases,The free liquid surface active index index gradually decreases;When the casting speed is greater than 1.4 m/min,with the SEN immersion depth increases,the free liquid level active index drops sharply to 0.37;After the optimization of mold electromagnetic stirring process of IF steel,the average sealing rate of inclusions and bubble defects in the casting billet decrease by 4%,and remarkable results are obtained.

关 键 词：IF钢 高拉速 结晶器电磁搅拌 数值模拟 结晶器流场 夹杂 气泡 

分 类 号：TF777[冶金工程—钢铁冶金]