Effect of inhibitor device on ladle vortex in teeming process
LIU Yong1,2, PENG Shi-heng1,2, ZHOU Xiao-bin1,2, ZHI Ge1, FAN Ding-dong1,2
1. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China; 2. Laboratory of Metallurgical Emission Reduction and Resources Recycling, Ministry of Education, Ma'anshan 243002, Anhui, China
Abstract：The slag may be entrapped into the molten steel if a vortex is developed during the ladle tapping process, thereby affecting the production quality. The vortex phenomenon at the tapping end of the ladle was studied by a physical model. The variation of the show-up height and the penetration height of the vortex were studied by adding different vortex inhibitor. It was found that increasing the standing time of the bath decreased the show-up and penetration heights. When the standing time was 30 min, the show-up and penetration heights decreased by 37.88% and 45.64%, respectively, compared with that of 5 min. Different vortex heights were acquired when different sizes of vortex inhibitors were applied or the inhibitor was placed in different positions in the ladle. The effect of the vortex device near the nozzle position may even cause negative effects on the vortex suppression if the inhibitor is not placed appropriately. The vortex height was reduced by more than 46.69% when placing a vortex device on the wall. In addition, it was found that with the increase of the distance of the inhibitor from the central nozzle, the swirling effect increased.
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2020, Vol. 30 
