板坯连铸结晶器液面波动指数分析及水口参数优化
Analysis of liquid surface fluctuations and optimization of water outlet parameters in slab continuous casting mold
林俊宇 1何杨 1刘建华 1潘宇康 1杨晓东 2黄基红3
作者信息
- 1. 北京科技大学高效轧制与智能制造国家工程研究中心,北京 100083
- 2. 北京科技大学高效轧制与智能制造国家工程研究中心,北京 100083;攀钢集团西昌钢钒有限公司,四川西昌 615032
- 3. 攀钢集团西昌钢钒有限公司,四川西昌 615032
- 折叠
摘要
针对国内某钢厂连铸过程结晶器液面波动导致铸坯质量降级率较大的问题,建立相似比1∶0.6的板坯结晶器水模型,系统研究了浸入式水口的出口角度、浸入深度对结晶器流场的影响,并进一步采用高速摄像机和3D粒子图像测速仪对不同工况下的结晶器流场进行可视化分析.结果表明,在现有1.10 m/s的拉速生产条件下,选取25°的水口以及150 mm的浸入深度的液面波动和表面流速分别为1.57 mm和0.268 m/s;后续在拉速为1.40 m/s生产需求下,选取25°的水口以及180 mm的浸入深度的液面波动和表面流速分别为2.42 mm和0.325 m/s,均在合适的范围内,有利于夹杂物的控制,可为实际的连铸生产提供工艺参数指导.
Abstract
The fluctuation of liquid level in the continuous casting process has caused severe quality degradation of slab in a Chinese steel mill.In order to solve this problem,a water model of mold with a similar ratio of 1∶0.6 was built to investigate the effects of the angle and submerged depth of nozzle on the flow filed of mold.The visualization analysis on the flow field of the mold under different conditions was carried out using a high-speed camera and a 3D particle image velocimeter.The results indicated that,under the existing casting speed of 1.10 m/s,selecting a wa-ter nozzle with a 25° angle and an immersion depth of 150 mm yielded liquid level fluctuation and surface flow veloci-ty of 1.57 mm and 0.268 m/s.When the casting speed increased to 1.40 m/s,liquid level fluctuation and surface flow velocity were 2.42 mm and 0.325 m/s,which were still within an appropriate range,by choosing a 25° water nozzle with a 180 mm immersion depth.This research work is conducive to the control of inclusions can provide a guidance of technical parameters for the actual continuous casting production.
关键词
结晶器水模型/3D粒子图像测速仪/浸入式水口/液面波动/表面流速/冲击深度Key words
mold water model/3D particle image velocimeter/submerged entry nozzle/level fluctuation/surface velocity/impact depth引用本文复制引用
基金项目
河北省中央引导地方科技发展资金资助项目(216Z1009G)
出版年
2024
NETL
NSTL
万方数据