Abstract: In accordance with the issue of poor homogeneity of composition and temperature of liquid in 150 t ladle bottom-argon-blowing with double nozzle located at 0. 2 R circumference in angle 90°, a test by using geometric similarity 1：4 water model with double nozzle location 0. 2 ~ 0. 8 R, in angle 45° ~ 180°, blowing rate 54. 6 ~491. 4 L/h (corresponding 150 t ladle blowing rate 50 -450 L/min) has been carried out. Test results show that as compared with original ladle nozzle location, for the optimum scheme- double radius 0. 6 R circumference, in angle 180° and each nozzle flow rate 382. 2 L/h (corresponding 150 t ladle 350 L/min) the mixing time of liquid decreases by 28. 6%.

摘要： 针对钢厂150 t底吹氩钢包于0.2R圆周上成90°布置的双孔吹氩,钢水成分和温度均匀性较差的问题,进行了几何相似比1:4,双孔吹氩位置0.2~0.8 R,夹角45°~180°。吹气量54.6~491.4 L/h(相当于150 t钢包吹气量50~450 L/min)的水模型试验。试验结果表明,最优方案为双孔半径0.6 R圆周,夹角180°,每孔流量382.2 L/h(相当于150 t钢包350 L/min),混匀时间比原钢包的喷嘴布置减少28.6%。

关键词: 150 t钢包, 底吹氩, 喷嘴布置, 混匀时间, 水模型试验