30 t对称四流小圆坯中间包结构优化

Structural optimization of tundish for 30 t symmetrical four-flow small round billet

为了优化某钢厂30 t对称四流小圆坯中间包的冶金效果,以该钢厂当前使用中间包为原型,根据相似原理,利用水模型模拟对其内部控流装置进行优化,测量不同情况下中间包的RTD曲线,进而计算出中间包内钢水的峰值时间、死区比例等指标。结果表明,原型中间包的中间包冶金效果不佳,根据优化方案,导流板每面开双孔时,较优方案为方案3,此时中间包死区比例为10.96%;导流板每面开单孔时,较优方案为方案18,此时中间包内死区比例为8.74%,但此中间包冶炼结束时,中间包内留钢量较大,经济成本较高。综合来看,使用双孔较优方案最佳。

In order to optimize the 30 t symmetrical four-strand small round billet tundish in a steel plant,the tundish currently used in the steel plant is used as a prototype,on the basis of similarity principle,the internal flow control device of the tundish is optimized by water model simulation,and RTD curve of the tundish under different conditions is measured,and then calculate the peak time,dead zone ratio and other indicators of molten steel in the tundish.The results show that the metallurgical effect of the prototype tundish is not good.According to the optimization scheme,when two holes are opened on each side of the deflector,the optimal scheme is scheme 3.At this time,the proportion of the dead zone of the tundish is 10.96%.When opening a single hole,the preferred plan is scheme 18.At this time,the proportion of dead zone in the tundish is 8.74%.However,when the smelting of this tundish is completed,the amount of steel left in the tundish is large,and the economic cost is high.On the whole,it is the best to use the double-hole optimal solution.