2.05m/min高拉速低碳钢FC控流结晶器的应用  

Application of fluid control mold on low carbon steels at 2.05m/min high speed slab continuous casting

作　　者：罗衍昭 何文远[2] 王少军[2] 周海忱 季晨曦 李海波 LUO Yan-zhao;HE Wen-yuan;WANG Shao-jun;ZHOU Hai-chen;JI Chen-xi;LI Hai-bo(Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100041,China;Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100041 [2]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《连铸》2022年第4期72-77,共6页Continuous Casting

摘　　要：板坯高速连铸因具有减少设备投资、增产增效和降低物料消耗的优势而受到越来越多的关注。为解决低碳钢浇铸周期与精炼周期的匹配问题和进一步提高生产效率,某钢厂开展了结晶器电磁制动参数优化的高速连铸工艺技术研究,施加磁场后,随着上线圈电流由模式A增加到模式C,结晶器表面的钢液流速由0.35 m/s减小至0.21 m/s,结晶器内上部流场流速减弱,在高拉速下可明显起到降低表面流速的作用,随着吹氩流量从12 L/min增加至20 L/min,钢液表面流速增加,随着水口浸入深度的增大,结晶器内的流场形态变化不明显,2.05 m/min拉速下夹杂物指数较1.8 m/min拉速夹杂物指数明显降低。The high-speed slab continuous casting has attracted more and more attention because of its advantages of reducing equipment investment,increasing production and efficiency and reducing material consumption.In order to solve the problem of matching the casting cycle and refining cycle of low carbon steel and further improve the production efficiency.Some steel plant has carried out the research on the high-speed continuous casting process technology of optimizing the electromagnetic braking parameters of the mold.After applying the magnetic field,with the increase of the upper coil current from Type A to Type C,the surface velocity of molten steel in the mold is reduced from 0.35 m/s to 0.21 m/s,the electromagnetic braking can significantly reduce the surface velocity at high casting speed.With the increase of argon blowing flow from 12 L/min to 20 L/min,the surface velocity of molten steel increases.With the increase of nozzle immersion depth,the flow field shape in the mold does not change significantly.The inclusion index at 2.05 m/min is significantly lower than that at 1.8 m/min.

关 键 词：高速连铸 低碳钢 电磁制动 夹杂物 FC结晶器 数值模拟 

分 类 号：TF777[冶金工程—钢铁冶金]