250 t钢包精炼底吹氩吹孔位置优化的水模型试验

采用几何相似比1:3水模型,对250 t钢包底吹氩位置优化进行模拟试验,用电导法测定了单孔喷吹、双孔夹角90°和180°对称喷吹在至钢包中心不同距离处(0.37~0.61 R)采用不同吹气量(5~25 m³/h)时钢水的混匀时间。试验结果表明,单孔底吹氩,吹孔距钢包底部中心0.61 R(R为钢包底部半径)时混匀时间最短;双孔喷吹对称分布的混匀时间比单孔喷吹的混匀时间短;当双孔喷嘴0.61 R对称分布时,混匀时间最短,死区最小,且双孔喷嘴间距由0.37 R增至0.61 R时混匀时间明显减小。

Water Modeling Examination for Optimization of Bottom Argon Blowing Location in 250 t Ladle Refining

The simulation test on optimization of 250 t ladle bottom argon blowing location has been carried out by using geometric similarity 1： 3 water model, and the liquid mixing time with single nozzle blowing, 90° angle double nozzle blowing and 180° angle symmetric double nozzle blowing at different blowing rate (5 ~ 25 m³/h) and different distance from center of ladle (0. 37 ?0. 61 R) is measured by using conductivity measuring method. Test results show that with single nozzle bottom argon blowing and nozzle distance from center of ladle bottom 0. 61 R ( radius of ladle bottom) , the mixing time of liquid is shortest ； the mixing time of liquid with symmetric double nozzle blowing is shorter than that with single nozzle blowing, and with increasing the distance from center of ladle bottom form 0. 37 R to 0. 61 R, the mixing time of liquid obviously decreases, therefore the mixing time of liquid with 0. 61 R symmetric double nozzle blowing is shortest and the dead area is minimum.