摘要
针对连铸生产过程中钢包长水口与中间包湍流控制器对中存在偏差的实际情况,基于八流T形连铸中间包,采用三维数值模拟方法研究了对中偏差对流场的影响;同时为减弱对中偏差的影响,设计了新型控流装置,并通过数值模拟和工业试验对其冶金效果进行了验证。研究结果表明,长水口与稳流器对中偏差为50 mm时,中间包流场明显恶化,冲击区液面流速和湍流强度大幅增加,大大增加了卷渣风险,且死区体积增加了4个百分点;而新型控制装置使冲击区最大湍动能降低50%,冲击区液面更加平稳,死区体积基本不变,B类、C类夹杂物的合格率提高约6%。
Concerning the fact that ladle shroud cannot strictly point to the center of turbo-stopper in the tundish,based on eight-strand T-shape tundish,3 D numerical simulation has been done to illustrate the influence of misalignment to flow field. At the same time,new type of flow control device has been designed and its metallurgical effect has been validated by numerical simulation and industrial test. The results indicate that the offset distance of ladle shroud will worsen tundish flow field. When the offset distance is 50 mm,the turbulence and velocity largely increase on the surface of impact zone,which increases the risk of slag entrapment,and the dead zone rate is 4% larger than that of well alignment.The new type of flow control device can 50% decrease the surface turbulence,which leads to more peaceful surface and less risk of slag entrapment,and the dead zone changes little. And so the purity of steel increases,which is authenticated by industrial test results that the pass percent of B and C inclusions 6% increases respectively.
作者
陈远清
仇圣桃
CHEN Yuan-qing;QIU Sheng-tao(National Engineering and Research Center for Continuous Casting Technology,Central Iron and Steel Research Institute,Beijing 100081,China;Zhangjiagang Lianfeng Iron and Steel Research Institute Co.,Ltd.,Zhangjiagang 215628,Jiangsu,China)
出处
《钢铁》
CAS
CSCD
北大核心
2018年第7期45-49,共5页
Iron and Steel
基金
科技部科研院所技术开发研究专项资金资助项目(NCSTE-2006-JK-ZX-030)
关键词
连铸中间包
控流装置
对中
冲击区
卷渣
continuous casting tundish, flow control device
alignment
impact zone
slag entrapment
