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连铸薄板坯结晶器内夹杂物运动的模拟研究
Simulation Study of Inclusions Motion in Thin Slab Mould for Continuous Casting
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- DOI:
- 作者:
- 张琦 李欢 吴滟帮 尹相恺
ZHANG Qi;LI Huan;WU Yanbang;YIN Xiangkai
- 作者单位:
- 青岛理工大学机械与汽车工程学院
School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China
- 关键词:
- 连铸薄板坯 结晶器 夹杂物 运动轨迹
continuous casting thin slab crystallizer inclusions trajectory
- 摘要:
- 采用水模拟和数值模拟相结合的方法分析了连铸薄板坯结晶器内夹杂物的运动状况。通过Proanalyst软件分析高速显微摄像仪拍摄的夹杂物运动图,获得了夹杂物在结晶器内的运动路径;同时,采用拉格朗日法计算获得了结晶器内夹杂物的运动路径,将二者相互对比,分析了拉速和浸入式水口深度对夹杂物运动轨迹的影响。结果表明:夹杂物在结晶器的运动轨迹复杂;拉速越小,浸入水口的深度越浅,夹杂物越容易在上回流区盘旋;拉速越大,浸入水口的深度越深,夹杂物容易在下回流区盘旋;增大夹杂物在结晶器内的停留时间有利于防止夹杂物进入铸坯内形成缺陷。The motion of inclusions in thin slab mould was analyzed by water simulation and numerical simulation.By analyzing the motion diagram of inclusions captured by high-speed micro-camera,Proanalyst software,the motion path of inclusions in the crystallizer was obtained.At the same time,the motion path of inclusions in the mould is calculated by Lagrange method,and the influence of drawing speed and submerged nozzle depth on the motion path of inclusions are analyzed.The results show that the motion path of inclusions in the crystallizer is complex.The drawing speed is lower,the depth of dipping into the nozzle is shallower,and it is for the inclusion to circle in the upper backflow area is easier.The drawing speed is greater,the depth of the submerged nozzle is deeper,and the inclusion is easy to circle in the lower backflow area.Increasing the residence time of the inclusions in the mould can prevent the inclusions from entering into the billets and forming defects.