热镀锌锌锅电磁驱渣模拟研究及生产实践  

Numerical simulation on electromagnetic driving dross for continuous hot-dip galvanizing line and industrial application review

作　　者：侯晓光[1] 钱洪卫[1] 陆勇[1] HOU Xiaoguang;QIAN Hongwei;LU Yong(Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,Chna)

机构地区：[1]宝山钢铁股份有限公司,上海201900

出　　处：《轧钢》2022年第4期87-96,131,共11页Steel Rolling

基　　金：宝钢股份有限公司资助项目(A16EC13411)。

摘　　要：锌渣是带钢热镀锌工序的必然产物,锌渣清理一直是国内外镀锌领域的难题。针对锌锅内锌液表面锌渣的分布特点,提出了一种在锌锅锌液上方加载行波电磁场以驱动锌液有序流动,进而拖动锌渣跟随流动以改变其分布的新方法,称为热镀锌锌锅电磁驱渣法(CGL-EMD:electromagnetic driving dross for continuous hot dip galvanizing line)。通过电磁场和流场顺序耦合模拟,研究了EMD不同布局及电磁特性参数对锌液流场的影响。结果表明:EMD可有效促进锌锅表层锌液沿壁面的切向流动,最大切向流速可达0.8 m/s以上;锌液切向流速随加载磁场力的增大而增大,而受加载时间的影响较小,且给出了EMD对深度方向的锌液流动影响规律。最后,讨论了EMD与捞渣机器人耦合清渣路径和驱-扒-捞清渣工艺,并介绍了EMD系统在中国宝武集团的应用实践和生产实效。During continuous hot-dip galvanizing production, zinc dross is formed inevitably, and the cleaning of which has always been a difficult problem at home and abroad. Aiming at the distribution characteristics of zinc dross on the top of zinc bath in hot-dip galvanizing, a new method called electromagnetic driving dross for continuous galvanizing line(CGL-EMD) was proposed, by which the top of zinc bath in a zinc pot will be driven flowing by exerting traveling wave electromagnetic field at a certain level above the zinc bath, so the dross will be certainly dragged flowing and re-distributed on the top of zinc bath. Through the sequential coupling simulation of electromagnetic field and flow field, the effect of different layouts of EMD and electromagnetic characteristic parameters on flow field were studied. The results show that EMD can effectively promote the tangential flow of the top of the zinc bath, and the maximum tangential velocity can be up to 0.8 m/s. And the tangential flow velocity increases with the increase of the exerting magnetic field force, but it is less affected by the exerting time. And then, the effect of EMD on the flow of the zinc bath in different depths is given. Finally, different dross cleaning paths and the connected in sequence process of dross driving-skimming-scooping were discussed, and the industrial practice of EMD system in China Baowu Group Co., Ltd. were introduced.

关 键 词：热镀锌 锌锅 锌渣 EMD 行波电磁场 CFD数值模拟 

分 类 号：TG174.4[金属学及工艺—金属表面处理]