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对断面尺寸为250 mm×1550 mm厚板坯结晶器进行了水力学模拟试验,研究了浸入式水口结构及工艺参数对结晶器内液面波动及流场的影响,并针对现有水口下出现的铸坯角部夹渣及表面质量问题,对水口结构进行了优化。结果表明:水口结构对液面波动影响较大。同种工况下,S1水口的流股到达窄边的冲击速度最大,达到0.29 m/s,冲击深度最小,S1水口的液面波高比其他水口大。S1水口为较优水口,推荐的浸入深度为110~150 mm,吹气量为7~9L/min。
The hydraulics simulation tests on slab mold with section size of 250 mm × 1550 mm were carried out. The effects of submerged nozzle structure and process parameters on the liquid surface fluctuation and flow field in mold were studied. In addition, The corner of the slab slag and surface quality problems, the nozzle structure has been optimized. The results show that the nozzle structure has a great influence on the liquid level fluctuation. Under the same operating conditions, the impact of the flow of the S1 nozzle to the narrow side is the highest, reaching 0.29 m / s, with the lowest impact depth and the S1 wave surface having a higher wave height than the other nozzles. S1 nozzle for the better nozzle, the recommended depth of immersion 110 ~ 150 mm, blowing volume of 7 ~ 9L / min.