电磁连铸过程FTSR结晶器多相传输行为的研究  

Investigation of multiphase transport behaviors in a FTSR mold during electromagnetic continuous casting process

作　　者：许琳 裴群武 李阳 韩泽峰 杨硕 王建宇[1] Xu Lin;Pei Qunwu;Li Yang;Han Zefeng;Yang Shuo;Wang Jianyu(Shenyang Institute of Engineering,Key Laboratory of Liaoning Province for Clean Combustion Power Generation and Heating Technology,Shenyang 110136,Liaoning,China;Northeastern University,School of Metallurgy,Shenyang 110819,Liaoning,China;Shenyang Academy of Instrumentation Science Co.,Ltd.,Shenyang 110043,Liaoning,China;State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China)

机构地区：[1]沈阳工程学院省级洁净燃烧发电与供热技术重点实验室,辽宁沈阳110136 [2]东北大学冶金学院,辽宁沈阳110819 [3]沈阳仪表科学研究院有限公司,辽宁沈阳110043 [4]钒钛资源综合利用国家重点实验室,四川攀枝花617000

出　　处：《钢铁钒钛》2023年第4期125-134,共10页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(51906163);辽宁省博士科研启动基金项目(2022-BS-224);辽宁省教育厅科研项目(LJKQZ20222282)。

摘　　要：为研究薄板坯连铸全幅一段电磁制动冶金效果,以漏斗形FTSR结晶器为研究对象,利用建立的三维多场数学模型,模拟全幅一段电磁制动作用下电磁参数变化对FTSR结晶器钢液流动、传热凝固及夹杂物迁移行为的影响。结果表明,施加全幅一段电磁制动后,结晶器内钢液温度分布的均匀性提高,钢液流股对熔池的穿透深度减小,这不仅利于下回流钢液夹带的夹杂物上浮去除,还促使上回流钢液将热量输送到弯月面区,避免弯月面处熔渣凝固而形成渣圈。此外,通过适当增加磁感应强度,可降低钢液表面流速,控制上吐出孔处液面波动。当磁感应强度达到0.3 T时,钢液表面最大流速降低至0.27 m/s,上吐出孔处液面峰值降低至7.3 mm。For the research object of flexible thin slab rolling(FTSR)funnel-shaped mold,a three-dimensional(3-D)multi-field coupling mathematical model was established for describing the electromagnetic braking(EMBr)continuous casting process.To investigate the metallurgical effect of Ruler-EMBr device,the effects of various electromagnetic parameters on the behaviors of molten steel flow,heat transfer,solidification,and inclusions motion in the FTSR mold were discussed.The results indicate that the application of Ruler-EMBr can improve the uniformity of molten steel temperature distribution and reduce the penetration depth of downward backflow in the FTSR mold.This is beneficial to the floating removal of inclusions entrained in the downward backflow.Moreover,it is also conducive to the upward backflow to transport more heat to the meniscus region,avoiding slag solidification and slag rim formation.The parametric study also shows that the molten steel surface velocity can be reduced and the surface fluctuation at the upper ports of submerged entry nozzle(SEN)can be controlled with the increase of magnetic flux density appropriately.When the magnetic flux density reaches to 0.3 T,the maximum molten steel surface velocity decreases to 0.27 m/s,and the surface peak value at the upper ports of SEN decreases to 7.3 mm.

关 键 词：连铸 FTSR结晶器 电磁制动 钢液流动 传热凝固 夹杂物迁移 

分 类 号：TF777.1[冶金工程—钢铁冶金]