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采用1:2水模型研究了水口结构(S1-侧孔倾角矩形,总面积6 868 mm~2,倾角-25°;S2-跑道型,总面积8 468 mm~2,倾角-15°;S3-椭圆形,总面积8 011 mm~2,倾角-15°),拉速0.85~1.05 m/min和浸入深度55~75mm对结晶器内液面波动、流场分布及保护渣覆盖情况的影响、结果表明,液面波动量随侧孔面积和倾角减小而增大,当侧孔面积减小5.4%时,波动量增加约为32.4%:波动量随拉速的增加、浸入深度的减小而增加;冲击深度随侧孔面积、侧孔倾角及拉速的增加而增加、现有水口S2下液面波动过小,不利于保护渣的熔化与均匀传热;现有水口S1下的冲击深度过大,小利于夹杂物的去除。优化水口S3下的液面波动及冲击深度均更加合理,保护渣更加活跃,有利于保护渣熔化和去除夹杂物、
A 1: 2 water model was used to study the structure of the nozzle (S1-side hole inclination rectangle with a total area of 6 868 mm2 and a dip angle of -25 °; S2-runway type with a total area of 8 468 mm2 and a dip of -15 °; - oval shape, total area 8 011 mm ~ 2, dip angle -15 °), pulling speed of 0.85 ~ 1.05 m / min and immersion depth of 55 ~ 75 mm on the liquid level fluctuation, flow field distribution and mold powder coverage in the mold The results show that the fluctuation of liquid level increases with the decrease of side hole area and dip angle. When the side hole area decreases by 5.4%, the fluctuation increases by 32.4% Small and increase; the impact depth increases with the side hole area, the side hole inclination and pulling speed increases, the existing nozzle S2 under the liquid level fluctuations is not conducive to the flux melting and uniform heat transfer; S1 Impact depth is too large, small conducive to the removal of inclusions. Under the optimized outlet S3, the fluctuation of the liquid level and the impact depth are more reasonable, the mold powder is more active, which is beneficial to the flux melting and removal of inclusions,