【摘要】 通过水模型研究了国内某厂150t钢包双透气砖底吹氩位置及流量对钢液混匀时间的影响,利用优质真空泵油模拟钢包顶渣,对不同吹气位置及吹气流量下钢液裸露面积进行了比较。结果表明,双孔夹角180°、吹气孔位于各自半径0.6R圆周上(吹气孔11和15)时混匀时间短且钢液裸露面积小,同时对包壁冲刷更小。钢包改造后工业试用表明,通过优化钢包透气砖位置及钙处理后钢液软吹氩流量及时间,钢液钙处理增氧质量分数降低28×10-6,降幅达78%;钢液出LF全氧质量分数降低34×10-6,降幅为45%,全氧含量控制水平明显提高。更多还原

【Abstract】 The influence of two-hole-bottom argon blowing position and flow on steel mixing time in 150 tladle was studied by the method of water simulation.Vacuum pump oil was simulated as top slag to compare the area of steel exposed under different blowing position and flow.The results show argon blowing at the position 11 and 15(at the angle of 180,0.6Rfar to the center of ladle)is the first-rate choice.At this position,the area of steel exposed and the scour to the ladle refractories is the minimal.Industrial tests show that through the optimization of argon blowing position and soft bubbling flow and time after Ca-treatment,the increase of w(T.O)in liquid steel Catreatment decreases by 28×10-6 and the decline rate was 78 %.The content of w(T.O)decreases by 34×10-6 after LF refining process and the decline rate reaches45 %.The control of T.O content has improved significantly.更多还原