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Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert
LI Nan 1,CAO Lingling 1,LIU Qing 1 #,LIN Wenhui 1,GUO Weida 2,Ren Keshe 2
1.State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2.Shandong Iron and Steel Group Co., Laiwu, 271126, Shandong, China
*Correspondence author
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Funding: none
Opened online:17 November 2017
Accepted by: none
Citation: LI Nan,CAO Lingling,LIU Qing.Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert[OL]. [17 November 2017] http://en.paper.edu.cn/en_releasepaper/content/4741983
 
 
Based on the similarity theory, the influence of the lance height, the gas flowrate and the holes of oxygen lance on the impact effects and mixing behavior in the molten bath were investigated by hydrodynamics experiment using 1:6 water model for 80 t basic oxygen furnace. The results show that the impact diameter, the penetration depth and the cavity shape index all increase with increasing gas flowrate. The optimal mixing time of the bath is 38 s by controlling the oxygen lance height at 138.55 mm. Under the same condition, the mixing effect of the 4-hole nozzle is better than that of the 5-hole nozzle. In addition, the quantitative relation between the dimensionless penetration depth and Fr\' is deducted.
Keywords:similarity theory ; impact effect key ; cavity shape index ; mixing time
 
 
 

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