Abstract:Numerical simulation and physical simulation were combined to study the launder in the Vacuum induction furnace. Based on the prototype flow control device in the plant, the position and quantity of the baffle and dam were changed, and the flow state and the removal effect of inclusions in the launder under different control devices were compared. The results showed that the dead zone ratio with the prototype flow control device was relatively high, reaching 14.12%, the peak concentration of RTD curve was relatively high, the flow trace in the edge area is sparse, and the flow state is poor, resulting in a low inclusion removal rate. On the base of the prototype scheme, a group of baffle and dam were added, the dead zone ratio was 6.71% lower than that of the prototype scheme, and the average residence time increases by 4.9 s. This was due to the increase of the fluid flow through the dam to reach the edge area of the launder, effectively reducing the volume of the edge dead zone and improving the probability of inclusion floating.
汪易航, 李静远, 杨树峰, 李京社. 真空感应炉内流槽控流装置优化模拟[J]. 中国冶金, 2020, 30(7): 23-27,55.
WANG Yi-hang, LI Jing-yuan, YANG Shu-feng, LI Jing-she. Optimization simulation of flow control device in launder of vacuum induction furnace[J]. China Metallurgy, 2020, 30(7): 23-27,55.
CHEN Z Y, YANG S F, LI J S,et al. Effects of different hot working techniques on inclusions in GH4738 superalloy produced by VIM and VAR[J]. Materials, 2018, 11(6):1024.
[2]
CHEN Z Y, YANG S F, QU J L, et al. Effects of different melting technologies on the purity of superalloy GH4738[J]. Materials, 2018, 11(10):1838.
ZHONG L C, LI B K, ZHU Y X, et al. Fluid flow in a four-strand bloom continuous casting tundish with different flow modifiers[J]. ISIJ international, 2007, 47(1): 88.
Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes[J]. ISIJ International, 1996,36(6):667.
[11]
Sebastian Neumann,Amjad Asad,Tom Kasper,Rüdiger Schwarze. Numerical simulation of metal melt flow in a one-strand tundish regarding active filtration and reactive cleaning[J]. Metallurgical and Materials Transactions B,2019,50(5):2334.