Effect of electromagnetic swirling flow in slide-gate SEN on flow field in square billet continuous casting mold  

作　　者：Dianqiao GENG Hong LEI Jicheng HE Haitao LIU 

机构地区：[1]Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, North- eastern University, Shenyang 110819, China [2]State Key Laboratory of Rolling 8z Automation, Northeastern University, Shenyang 110819, ChinaManuscript received 15 March 2012 in revised form 16 May 2012

出　　处：《Acta Metallurgica Sinica(English Letters)》2012年第5期347-356,共10页金属学报（英文版）

基　　金：financially supported by the National High Technical Research and Development Programme of China (No. 2009AA03Z530);the National Natural Science Foundation of China and Shanghai Baosteel (No. 50834010);the National Natural Science Foundation of China (Nos. 51174058, 51104047 and 51004035);111 Project (No. B07015);the Fundamental Research Funds for the Central Universities(No. N100409007);the Doctor Startup Foundation of Liaoning Province (No.20111009)

摘　　要：In order to weaken the bias flow in the submerged entry nozzle （SEN） with slide- gate, the rotating magnetic field was imposed. The numerical method was employed to investigate the effect of rotating magnetic field on the flow field in the SEN and the mold under different slide-gate opening ratios. Numerical results showed that when the slide-gate opening ratio is smaller than 100%, the flow field in the SEN and the mold become asymmetry and there is an obvious circulation under the slide- gate in the SEN. With increasing exciting current, the divergent angle of liquid steel at the SEN outlet increases, the impact depth of liquid steel in the mold decreases. With increasing slide-gate opening ratio, the impact depth of liquid steel in the mold increases and the required exciting current to weaken the bias flow should increase.In order to weaken the bias flow in the submerged entry nozzle （SEN） with slide- gate, the rotating magnetic field was imposed. The numerical method was employed to investigate the effect of rotating magnetic field on the flow field in the SEN and the mold under different slide-gate opening ratios. Numerical results showed that when the slide-gate opening ratio is smaller than 100%, the flow field in the SEN and the mold become asymmetry and there is an obvious circulation under the slide- gate in the SEN. With increasing exciting current, the divergent angle of liquid steel at the SEN outlet increases, the impact depth of liquid steel in the mold decreases. With increasing slide-gate opening ratio, the impact depth of liquid steel in the mold increases and the required exciting current to weaken the bias flow should increase.

关 键 词：Square billet Electromagnetic swirling flow Slide-gate SEN Continuous casting Bias flow 

分 类 号：TF341.6[冶金工程—冶金机械及自动化] TG142.45[一般工业技术—材料科学与工程]