高拉速水口结构对结晶器内钢液流动状态的影响  

Effect of Submerged Entry Nozzle Structure in High Casting Speed on the Flowing State of Molten Steel in the Mold

作　　者：裴培 张志勇 PEI Pei;ZHANG Zhiyong(Steel Making Dept.,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063210,China)

机构地区：[1]首钢京唐钢铁有限责任公司炼钢作业部,河北唐山063210

出　　处：《铸造技术》2018年第7期1481-1484,共4页Foundry Technology

摘　　要：采用数值模拟的方法,研究了凹形、凸形及底部开孔3种水口底部结构对高拉速条件下结晶器内钢液流动状态的影响。结果表明,凹型水口较凸形水口有利于结晶器内钢液流场稳定;结晶器水口底部开孔,分担了两侧孔流股,上回流减弱,表面流速随底孔直径的增加而降低;采用底部凹形、开孔φ30 mm三孔水口的结晶器液面特征适用于高拉速板坯连铸。采用物理模拟的方法,基于PIV测量技术,验证了1∶1水模型三孔水口的适用性。Effects of nozzle bottom design of submerged entry nozzle in high casting speed slab continuous casting mold on fluid flow were investigated by numerical simulation.The results show that the concave nozzle is more favorable than the convex nozzle to stabilize the flow field of molten steel in the mold,and the three-hole nozzle share the streams both sides,and the surface velocity decreases with the increase of the hole diameter.The most suitable structure of submerged entry nozzle is a three-hole nozzle with a well-bottom and the diameter of 30 mm.Based on the method of physical simulation,the applicability of the three-hole water port of 1 ∶1 water model is verified based on PIV measurement technology.

关 键 词：高拉速 结晶器 浸入式水口 连铸 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]