水口浸入深度对CSP结晶器内流场的影响  

Influence of nozzle immersion depth on liquid steel flow in CSP mould

作　　者：裴英豪[1] 朱涛[1] 王茹玉[2] 肖超 王海军 PEI Ying-hao;ZHU Tao;WANG Ru-yu;XIAO Chao;WANG Hai-jun(Technology Center,Ma′anshan Iron and Steel Co.,Ltd.,Ma′anshan 243000,Anhui,China;Cold Rolling Plant,Ma′anshan Iron and Steel Co.,Ltd.,Ma′anshan 243000,Anhui,China;School of Metallurgical Engineering,Anhui University Of Technology,Ma′anshan 243032,Anhui,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [2]马鞍山钢铁股份有限公司冷轧总厂,安徽马鞍山243000 [3]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《连铸》2021年第6期38-43,共6页Continuous Casting

摘　　要：为了解决高拉速生产条件下CSP板坯表面质量问题,利用数值计算软件FLUENT针对某厂CSP连铸机水口插入深度对结晶器流场及液面波动的影响进行了数值模拟研究。研究结果表明,不同的水口浸入深度结晶器内流场基本相同,增加水口浸入深度对结晶器流场影响不明显,水口浸入深度的大小直接决定了从水口流出的流股撞击结晶器窄面位置的高低,同时得出,当水口浸入深度从300、340增大到380mm时,液面处最大流速分别为0.180、0.160和0.127m/s;增大水口浸入深度,结晶器上回流对结晶器液面的扰动将减弱,对应的卷渣次数减少。In order to solve the problem of CSP slab surface quality under high-speed production conditions,the liquid steel flow and level fluctuation of the CSP mould has been studied by numerical calculation method with FLUENT for the CSP continuous caster of a factory.The research results show that the flow field in the mould is basically the same when different nozzle immersion depths.Increasing the nozzle immersion depth has no obvious effect on the mould flow field.The immersion depth of the nozzle directly determines the position where the stream flowing from the nozzle hits the narrow surface of the mould.Furthermore,when the immersion depth of the nozzle increases from 300,340 to 380 mm,the maximum flow velocity at the liquid level is 0.180,0.160 and 0.127 m/s respectively.When the nozzle is immersed in depth,the disturbance of the mold backflow on the mould level fluctuation will be weakened,and the corresponding number of slag coiling will be reduced.

关 键 词：结晶器 流场 液面波动 浸入深度 紧凑式热带生产技术 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]