太钢二炼钢结晶器液面波动的水模拟研究

Water model simulation on liquid steel level fluctuation of cast mould at No.2 Steel-making Plant of TISCO

对太钢二炼钢结晶器进行了水模拟实验，研究了水口倾角、水口浸入深度及拉速对结晶器液面波动的影响。根据实际生产情况，实验中拉速取值0．8m／min、0．85m／min、0．9m／min；倾角取值10°、12°、15°；浸入深度取值60～160mm（间隔20mm）。研究发现水口倾角、拉速对结晶器液面波动的影响较小，水口浸入深度对结晶器液面波动的影响较为显著，根据试验结果，将水口浸入深度由110mm调整为130mm，0Crl8Ni9不锈钢冷轧板降级比例从6．38％降低到了4．80％。

The effects of entry angle and submergence depth of the nozzle as well as the casting speed on fluctuation of the liquid steel level of the mould have been researched by water model simulation of cast mould in the No. 2 steel-making Plant of TISCO. In the experiments the appropriate casting speed values are determined to be 0. 8 m/min, 0. 85 m/min and 0. 9 m/min separately, and the entry angle determined is 10, 12 and 15 degree respectively and the submergence depth is controlled within the limit of 60 160mm （20mm space） in light of the practical production conditions. It＇s verified out of the experiments that the effect of the entry angle of the nozzle and the drawing speed on the liquid level fluctuation is of insignificance, whereas the effect of the submergence depth of the nozzle on the liquid level fluctuation is very prominent. Experimental results show that the down grade ratio of the cold rolled stainless steel sheet 0Crl8Ni9 has been lowered to 4. 80% from 6.38% since the readjustment of the submergence depth of the nozzle to 130mm from original 110mm.