200mm×200mm方坯连铸用新型浸入式水口的数值模拟  

Numerical Simulation of a New Type Submerged Entry Nozzle for 200mm×200mm Billet Continuous Casting

作　　者：陈远清[1,2] 尚正鸿 陶乃标 王进 仇圣桃[2] 

机构地区：[1]张家港联峰钢铁研究所有限公司,张家港215628 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《特殊钢》2014年第2期13-15,共3页Special Steel

摘　　要：为了减轻水口侧孔射流对凝固坯壳的冲刷,便于侧孔水口在较小断面的方坯连铸上使用,提出扇形侧孔的水口设计理念。利用结晶器内钢水流动、传热的三维数学模型,分析比较了直筒形水口、矩形侧孔水口和扇形侧孔水口条件下200 mm×200 mm的方坯结晶器内的流场及温度场特征。研究结果表明,侧孔水口能降低射流冲击深度,促进夹杂物上浮,并提高弯月面温度和活跃程度,有利于化渣;扇形侧孔射流较分散,对凝固坯壳的冲刷作用显著减弱。In order to alleviate the impact of flow jet of nozzle side-ports on solidifying shell and easy to use the side- port nozzle to the mold for casting square billet with smaller cross section, a design idea of submerged entry nozzle （SEN） with flabelliform side-ports is advanced. The characteristics of flow field and temperature field in mold for casting 200 mm ~ 200 mm billet with straight channel nozzle, rectangular side-ports nozzle and flabelliform side-ports nozzle are ana- lyzed and compared by using three dimension math model of fluid flow and heat transfer in mold. Research results show that the side-ports nozzle is available to reduce the impact depth of flow jet, improve the inclusions floating up, and increase the temperature and activity of liquid at meniscus and favorable to smelt slag; the flow from flabelliform side-port is more dis- perse, so the effect of impact on solidifying shell is sharply decreasing.

关 键 词：方坯 浸入式水口 扇形侧孔 流场 温度场 数值模拟 

分 类 号：TF777.2[冶金工程—钢铁冶金]