Effect of differential flowrate argon blowing mode on mixing and top slag behavior for a 150 t ladle
HU Qun1, LI Xiao-song1, ZHANG Jia-quan1, LIAN Yan-xin2, TANG Hai-yan1
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Planning Department, Huaneng Yimin Coal Power Co., Ltd., Hulunbeir 021000, Nei Mongol, China
Abstract：In view of the problems caused by the collision of flow streams, the dissipation of stirring energy, the entrapment of ladle slag and the secondary oxidation of molten steel from the traditional double-hole equal flow bottom stirring mode in ladle with large flow rate,this paper puts forwards a novel double-hole differential flow rate stirring mode, taking a 150 t industrial ladle as the model, using a 1∶3 physical model to study the effect of the bottom blowing position, gas flow rate, and slag layer thickness on the ladle mixing and top slag exposed area under this mode, and compared with the double-hole same flow rate blowing mode. The results show that the double-hole differential flow stirring mode has a shorter mixing time and smaller top flux exposed area than the same flow stirring mode for the most cases, which may become a potential new ladle mixing mode. When the bottom blow holes are at 0.6R and the relative angle is 180°, the mixing time and slag eyes are small, and the two slag eyes are distributed on both sides of the ladle, which is beneficial to active the slag layer and reduce the secondary oxidation of molten steel.
胡群, 李小松, 张家泉, 连艳新, 唐海燕. 差流量吹氩模式对150 t钢包混匀与顶渣行为的影响[J]. 钢铁, 2020, 55(12): 31-38.
HU Qun, LI Xiao-song, ZHANG Jia-quan, LIAN Yan-xin, TANG Hai-yan. Effect of differential flowrate argon blowing mode on mixing and top slag behavior for a 150 t ladle[J]. Iron and Steel, 2020, 55(12): 31-38.
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2020, Vol. 55 
