100t精炼钢包底吹氩工艺物理模拟研究

Research on Physical Modeling for Bottom Blowing Argon in 100 t Refining Ladle

根据相似原理,对100 t精炼钢包建立了几何比例为1∶3.5的水力学模型。通过测试研究了不同底吹条件对钢包混匀时间的影响,确定了100 t钢包底部透气砖位置和底吹工艺。得出单喷吹时,0.6R位置为最佳吹气位置,吹气量应控制在（200~300）L/min,与目前工艺条件的混匀时间相差不大。双喷嘴最佳吹气方案为：喷嘴位于0.6R处,两喷嘴夹角为120°。同等吹气量下双喷嘴吹气时的混匀时间较之单喷嘴吹气时的混匀时间更长。

According to the similar principle,1∶ 3. 5 water mechanical model has been established for 100 t refining ladle. The influence of different bottom blowing conditions on the mixing time in ladle is researched by tests to determine the porous plug positions at the bottom of 100 t ladle and bottom blowing process. When blowing by single nozzle,0. 6R is the best position for blowing and the flow rate of gas blowing should be controlled in（ 200 ~ 300） L / min,which has little difference with the mixing time under the current process conditions. The optimal scheme for both nozzles is that the nozzle is placed at the position of 0. 6R and the angle between both nozzles is 120°. The mixing time of blowing by double nozzle is longer than that of blowing by single nozzle at the same flow rate.