降低大方坯中间包临界液面高度工艺研究

Study on Process for Reducing Height of Critical Liquid Level of Molten Steel in Bloom Tundish

中间包底部水口附近结构和流场形态影响中包临界液面高度。通过在中间包底部水口附近加抑流件的水模型优化实验及工业试验,确认了加抑流件可以降低中包临界液面高度,在工业生产中抑流件使用是安全的,中间包合理停浇液面对尾坯纯净度无影响。

The structure and flow pattern in the vicinity of the nozzle at the bottom of the tundish can influence the height of the critical liquid level of molten steel in tundish. Based on experiments of optimization of the water model and industrial tests by installing flow-controlled devices nearby the nozzle at the bottom of the tundish it is confirmed that the newly installed flow- controlled devices can reduce the height of the critical liquid level of molten steel in tundish and it is also safe to use the flow-controlled devices in industrial production. So the suitable liquid level of molten steel in tundish has no side effect on the purity of the tail casting strands after stopping casting.