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通过水模型研究方法,对某钢厂200mm×1800mm连铸机结晶器内流体的流动行为进行了研究,在此基础上对水口的结构参数和工艺参数进行了优化。研究结果表明:①拉坯速度、水口底部形式、水口出口形状、出口角度、出口面积比以及浸入深度等参数对结晶器内流场有重要影响,在对其进行优化研究时应综合考虑;②在试验条件下,结晶器优选出的新型浸入式水口的最佳结构参数为:水口倾角15°,出口面积比2.0,出口形状为跑道形,底部形状为平底,结合现场生产实际建议浸入深度为125mm,拉速为1.45m/min。
Through the research of water model, the flow behavior of the fluid in the mold of 200mm × 1800mm continuous casting machine in a steel mill was studied. Based on this, the structural parameters and process parameters of the nozzle were optimized. The results show that: (1) the casting speed, the bottom form of the nozzle, the outlet shape, the exit angle, the exit area ratio and the depth of immersion have important influence on the flow field in the mold, and should be considered comprehensively in the optimization research. Under the experimental conditions, the optimal structural parameters of the new immersion nozzle optimized by the mold are as follows: the nozzle angle is 15 ° and the exit area ratio is 2.0; the shape of the exit is racetrack shape and the shape of the bottom is a flat bottom; 125mm, pulling speed of 1.45m / min.