论文部分内容阅读
采用1∶4的比例建立水力学模型模拟210 t多功能RH浸渍管内钢液流动装置,对钢液流态进行分析,并考察吹氩量、浸渍管插入深度及吹氩孔个数对钢液流场和混匀时间的影响.结果表明:钢包内存在一主回流和大量小回流,并且来自下降管的下降液流和其周围液体形成了液--液两相流,这种流动状态对钢包内的混合及传质起着决定性的作用;本文得到的关于RH钢包内液体的这种流动状态,否定了RH过程的早期研究中关于下降管和上升管间存在“短流”现象的结论.吹氩量、浸渍管插入深度、上层和下层吹氩孔个数对钢液混匀时间的影响都非常明显,其中吹氩量及下层吹氩孔个数的变化对钢液混匀时间的影响趋势较为强烈.
A 1: 4 ratio was used to establish a hydraulic model to simulate the liquid flow in a 210 t multifunctional RH immersion tube. The fluid flow was analyzed, and the amount of argon blown, the depth of immersion tube and the number of argon- Flow field and mixing time.The results show that there is one main return flow and many small backflows in the ladle and the descending flow from the downcomer and the surrounding liquid form a liquid-liquid two-phase flow, The mixing and mass transfer inside the ladle plays a decisive role; this flow state obtained in this paper about the liquid in the RH ladle negates the “short-flow” phenomenon in the earlier studies of the RH process with respect to the descending tube and the ascending tube The amount of argon blowing, the immersion tube insertion depth, the number of upper and lower argon blowing holes on the mixing time of molten steel are very obvious, in which the amount of argon blowing and the bottom of the argon blowing holes changes the number of molten steel mixing The trend of the impact of the time is more intense.