圆坯结晶器应用电磁搅拌的物理模拟  

Physical Simulation of Flow Field in the Round Mould With EMS

作　　者：王超[1,2] 张慧[1,2] 王明林[1,2] 裴红彬[3] 马忠伟[1,2] 赵沛[1] 

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081 [2]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [3]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《钢铁》2013年第9期26-30,共5页Iron and Steel

基　　金：国家973基金资助项目(2010CB630806)

摘　　要：以某钢厂Φ500mm圆坯连铸结晶器为原型,建立了1∶1的物理模型,通过机械搅拌模拟结晶器电磁搅拌,分析研究了电磁搅拌对结晶器内钢液的流动、夹杂物去除率的影响。试验研究表明:电磁搅拌使结晶器内的钢液有一定的水平切向速度,使搅拌区钢水温度的分布更加均匀,有利于结晶器内保护渣的均匀熔化。电磁搅拌能够把水口冲击的轴向速度变为径向速度,从而大大降低流股的冲击深度,能有效地促进夹杂物的上浮和热区中心的上移。但并不是搅拌强度越大,夹杂物的去除率就越高,试验表明,在相同时间内,当搅拌强度为48r/min左右时,夹杂物的上浮率最高。A physical model was established with 1 ： 1 ratio, taking a Ф 500 mm round billet continuous casting mould in a plant as prototype. The effect of EMS on the flow field and inclusion behavior in the mould was studied. Mechanical agitation was applied with a stirring paddle to simulate electromagnetism generated by M-EMS. The results shows that M-EMS makes the molten steel gets a certain tangential velocity that improves the distribution uniformity of steel temperature of stir zone and also promotes the slag melting and moving. The flow at the outlet is turned to be radial from axial direction which helps decrease the impact depth of the steel flow, then the inclusions are better removed and the high temperature zone moves up. The increase extent of the inclusion remove rate is not linear with the increase of stirring strength. The highest of inclusion remove rate was obtained with the stirring strength of 48 r/min.

关 键 词：电磁搅拌 圆坯结晶器 切向速度 流场 搅拌强度 

分 类 号：TG233[金属学及工艺—铸造]