Physical and computational study of a novel submerged entry nozzle design for twin-roll casting process  

作　　者：Mian-guang Xu Miao-yong Zhu 

机构地区：[1]School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,Shandong,China [2]School of Metallurgy,Northeastern University,Shenyang 100819,Liaoning,China

出　　处：《Journal of Iron and Steel Research International》2021年第11期1390-1399,共10页

基　　金：the Fundamental Research Funds for the Central Universities(N130602005);the research grant of Shandong University of Technology(4041/419099);the Natural Science Foundation of Shandong Province(ZR2020ME111).

摘　　要：With significant emphasis on reducing the turbulence in the bath and the need for effective distribution of metal along the roller length in twin-roll casting,a novel submerged entry nozzle(SEN)configuration with two“gap regions”was provided.The“gap regions”of the new SEN divide the bath into two parts,the“upper melt bath”(casting region)and the“lower melt bath”(rolling region).The newly designed SEN was tested by using both full-scale water modeling experiments and numerical simulations.Results demonstrated that the turbulence could only be found near the rotating roller surfaces.The“gap regions”can make the near-wall flows more uniform.They can also prevent the instabilities in the“upper melt bath”to be transferred to the“lower melt bath”,thus improving the stability of the process.Moreover,the novel SEN can stabilize the meniscus where the initial solidification occurs.This is achieved by increasing the SEN immersion depth,which in turn,can enlarge the volume of the upper part of the bath.

关 键 词：Twin-roll casting Submerged entry nozzle Water model Numerical simulation 

分 类 号：TG249[金属学及工艺—铸造]