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以某135t LF钢包底吹氩为原型,建立了模型和原型比为1∶3.4的钢包水力学模型,研究了透气砖布置方式和吹氩流量对钢液混匀时间的影响。结果表明,在单吹工艺中,0.3R与0.4R下的混匀时间最短,分别为42.7、43.3 s,且对壁面的冲刷作用最弱;在双吹工艺中,大角度(≥120°)工艺比小角度工艺的混匀效果更好,0.5R-120°透气砖布置时混匀时间最短,为35.7 s。在相同流量下,单吹混匀时间略低于双吹。双吹工艺对包壁的冲刷明显好于单吹工艺。综合考虑,宜采用双吹工艺,原型的最佳透气砖布置为0.5R-120°。单、双吹工艺的最佳吹氩流量分别为500、600 L/min。
A 135 t LF ladle argon blowing was taken as the prototype to establish the model of ladle hydraulic model with the ratio of 1: 3.4. The influence of the arrangement of air-permeable brick and the flow of argon on the mixing time of molten steel was studied. The results showed that the mixing time of 0.3R and 0.4R was the shortest at 42.7 and 43.3 s, respectively, and the weakest effect was on the wall. In the double blowing process, the large angle (≥120 °) The mixing effect of the process is better than that of the small-angle process, and the mixing time of the 0.5R-120 ° ventilation brick is the shortest, which is 35.7 seconds. In the same flow, the single blow mixing time slightly lower than double blowing. Double blowing process on the wall of the erosion was significantly better than the single blow process. Taken together, should adopt double blowing process, the prototype of the best ventilation brick layout 0.5R-120 °. Single and double blowing process the best argon flow were 500,600 L / min.