180t转炉底吹和顶-底复吹射流与熔池作用的水模型研究  

Water Modeling Study on Interaction of Jet and 180 t Converter Bath with Bottom Blowing as well as Top and Bottom Combined Blowing

作　　者：包丽明[1] 吕国成[1] 刘坤[2] 

机构地区：[1]吉林电子信息职业技术学院冶金学院,吉林132021 [2]辽宁科技大学材料和冶金学院,鞍山114044

出　　处：《特殊钢》2015年第4期9-12,共4页Special Steel

摘　　要：根据180 t转炉的实际生产情况,以修正的Froude准数为相似准数,建立几何相似比10:1水模型,进行了四孔对称单纯底吹试验,并在最佳的底吹工艺参数下(底吹最佳位置为喷嘴所在同心圆直径:转炉熔池直径:0.3处;最佳流量为0.7 m^3/h,均混时间18.2 s),通过改变顶吹氧枪的气体流量和吹炼枪位进行了顶底复吹转炉射流与熔池作用的试验。结果表明,在底吹条件下,增加顶吹工艺(最佳枪位150 mm,最佳流量39 m^3/h),熔池平均的均混时间减少了5.6 s,180 t转炉顶底复吹可显著提高经济效益。According to the actual production situation of an 180 t converter, based on revised Froude number as experiment similarity number, a water model with geometrical-similar ratio 10 ： 1 is established, the four holes symmetric bot- tom blowing test has been carried out, and with optimum bottom blowing process parameters （the bottom blowing optimum location is nozzle at the concentric circles which diameter / converter bath diameter = 0. 3, and the optimum flow rate is 0. 7 m3/h with mixing time 18.2 s）, and the test of top and bottom combined blowing jet-bath interaction has also been carried out by modifying gas rate and lance level of top blowing oxygen lance. Results show that in bottom blowing condition, with increasing top blowing process （optimum lance level 150 mm, optimum gas flow rate 39 m3/h） the bath average mixing time decreases by 5.6 s, the economic benefits of 180 t converter top and bottom combined blowing steelmaking process in- creases obviously.

关 键 词：180 t转炉 顶底复吹 均混时间 气体流量 氧枪枪位 底吹位置 水模型 

分 类 号：TF71[冶金工程—钢铁冶金]