板坯中间包控流装置结构优化的水模研究

Water Model Study of Structure Optimization of Flow Control Device of Slab Tundish

根据相似原理,按照1:2比例对中间包建立水力学模型。考虑坝高、堰离底部高度、坝堰间距、堰与长水口注入点间距等参数对中间包内流场的影响,依据工厂实际工艺参数设计实验方案。对实验结果进行分析,结果表明:对原中间包结构进行优化,减小堰离底部距离及堰与注入点间的距离,钢液在中间包内响应时间由69.0 s延迟至75.0 s,平均停留时间由418.0 s增长至555.4 s,死区体积比例则由28.4%降至18.3%。

In the light of the similar principle,a hydraulics model was built according to the proportion of 1：2.Considering the effects of parameters,such as dam height,weir height from the bottom,distance between weir and dam,distance between weir and a long nozzle injection point on the flow field in tundish,experimental plan was designed according to the actual factory process parameters.Experimental results were analyzed.The results showed that by optimizing original tundish structure,and reducing weir height from the bottom and distance between weir and a long nozzle injection point,response time of the liquid steel in the tundish was extended from 69.0 s to 75.0 s,and the mean residence time was increased from 418.0 s to 555.4 s.Meanwhile,the ratio of dead zone volume was reduced from 28.4% to 18.3%.