摘要
借助连铸结晶器水模型和高速摄像技术研究了不同功率超声和超声处理时间对连铸结晶器内钢液流场的影响。结果表明:未加超声处理时,流场在横向以及纵向上的均匀度较差。超声功率400W时流场较300W时有显著改善,随着超声功率的增加,流场中心深度先增加后降低。超声处理功率500W、4.5s时,流场中心相对深度为0.56,超声空化作用适宜,有效改善了结晶器内的钢液动力学条件。超声功率600、700W时,流场中心相对深度分别为0.46、0.41,流场深度较浅,造成钢中的夹杂物没有足够的时间上浮去除,同时还会造成液面波动,甚至引起卷渣。
The effects of different power ultrasound and sonication time on the fluid field of continuous casting mold were studied by water modeling and high-speed camera technology in the laboratory.The results show that the fluid field has a bad uniformity both in transverse and longitudinal direction.When the ultrasonic power increases from 300 Wto 400W,the fluid field uniformity is improved.Meanwhile,with increasing the ultrasonic power,the depth of the fluid field center increases firstly and then decreases.With the ultrasonic power of 500 Wfor 4.5s,the depth of the fluid field center is the deepest,and the relative depth is 0.56.Moreover,the appropriate ultrasound cavitation can improve the dynamic condition of the molten steel in the mold.At the ultrasonic power of 600 Wor 700W,the relative depth is 0.46 and 0.41respectively;meanwhile,the depth of fluid field is shallow,and the inclusions in steel have no enough time to float and remove.Simultaneously,it can result in level fluctuation and even slag entrapment.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2016年第11期29-33,共5页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(51274004)
关键词
功率超声
结晶器
水模
流场
ultrasonic power
mold
water modeling
fluid field
作者简介
王建军（1955-），男，博士，教授；E-mail：wang-jj@ahut．eelu．cn
通讯作者：王海军（1988-），男，博士生；E-mall：Whichina@yeah．net
