宽板坯连铸结晶器内氩气分布的水模型

 针对塞棒、上水口吹氩时，吹入的氩气有多少进入到结晶器钢水内和氩气在结晶器断面上如何分布的问题，采用1：1水模型，重点研究了吹气量、吹气方式、拉速、浸入式水口倾角等工艺参数对不同宽度结晶器内气体分布状况的影响。结果表明，吹气量和吹气方式对结晶器内气体分布几乎没有影响，而拉速和水口倾角基本上就决定了宽度方向上的气体分布状况。小的结晶器断面宽度、小的水口倾角、高拉速时窄面附近含气比例更高，氩气泡更易被凝固坯壳所捕捉而使铸坯产生气泡缺陷。

Water Model Experiment on Argon Gas Distribution in Wide Slab Casting Mold

In order to understand the amount of the argon gas entered the mold and the distribution of argon gas in the mold when blowing argon gas through stopper or upper nozzle, the water model with 1∶1 scale was built to investigate the effects of casting speed, argon flow rate, the manner of blowing argon, nozzle port angle and other parameters on the argon gas distribution in the different wide slab casting mold. The results show that argon flow rate and the manner of blowing argon have no effect on the argon gas distribution. However, the casting speed and nozzle port angle decide the status of argon gas distribution in the mold. Argon gas distribution uniformity becomes clearer for bigger width, smaller nozzle port angle and larger casting speed.