Physical Modeling Study on the Meniscus Flow Control in Vertical Slab Continuous Casting Mold
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摘要: 为研究低拉速下结晶器流动控制装置对流场的影响,以宝钢立式板坯连铸机结晶器为研究对象,采用1:1的物理模型进行了水模试验,研究了两种浸入式水口条件下液面加控流装置与否、控流装置位置及其插入深度对液面波动及流场分布的影响。研究表明:水口侧孔倾角向下时,MFCD对流动模式的改变不大,但使得液面波动量有所减小;而水口侧孔倾角向上时,控流装置对流动模式有较明显的改变,液面局部波动量增加明显;控流装置插入深度在50~100 mm范围内,控流装置位置对液面波动的影响比插入深度显著;结晶器流动控制装置并不适用于低拉速条件下的板坯连铸。Abstract: In order to study the influence of mold flow control device(MFCD) on mold flow field at low casting speed,a full scale water model has been set up to simulate the mold flow field of vertical slab continuous caster in Baosteel.With two types of submerged entry nozzle(SEN),the effect of equipping MFCD or not,the position and the immersion depth of MFCD on mold level fluctuation and mold field distribution has been studied.The results show that MFCD has no obvious effect on the mold flow field distribution,but decreases the mold level fluctuation with downward outlet SEN.However,with upward outlet SEN,MFCD has obvious effect on the mold flow field distribution and largely increases the mold level fluctuation at some point of free surface.To the extent of immersion depth from 50 mm to 100 mm,the influence of MFCD position is more significant than MFCD immersion depth on mold level fluctuation.The MFCD is not applicable for slab continuous casting at low casting speed.
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Key words:
- slab continuous caster /
- MFCD /
- submerged entry nozzle /
- mold level fluctuation
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