Water Model Optimization of Three-Port Submerged Entry Nozzle Feeding a Funnel-Shaped Thin Slab Mold
DENG Xiao-xuan1,WANG Qiang-qiang1,QIAN Long2,WANG Xin-hua1,HUANG Fu-xiang1
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. CSP Branch of General Wire Rod Mill in WISCO, Wuhan 430083, Hubei, China
Abstract:A full-scale funnel-shaped thin slab water model was built to investigate the fluid flow, meniscus fluctuation and slag entrapping behaviors when it were fed by five three-port submerged entry nozzles (SENs) with various diameters.The results shows that the fluid flow in the present mold is a typical steady “double roll flow” when using these five SENs. Furthermore, meniscus fluctuation is within ±(3-5) mm under regular casting parameters (SEN immersion depth and casting speed is 280mm and 5m/min,respectively). The mode of slag entrapping is mainly entrapment by shear flow, and the vortex-related entrapment hardly occurs. The critical meniscus velocity which cause slag entrapping is determined to be 0.32m/s under the regular casting parameters mentioned above, which agrees well with the calculated value. The optimal bottom-hole diameter for this three-port SEN which is suitable for thin slab casting is 22mm.
邓小旋,王强强,钱龙,王新华,黄福祥. 适合漏斗型薄板坯连铸结晶器三孔水口的水模型优化[J]. 钢铁, 2012, 47(7): 26-30.
DENG Xiao-xuan1,WANG Qiang-qiang1,QIAN Long2,WANG Xin-hua1,HUANG Fu-xiang1. Water Model Optimization of Three-Port Submerged Entry Nozzle Feeding a Funnel-Shaped Thin Slab Mold. Iron and Steel, 2012, 47(7): 26-30.
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