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基于相似原理,按照1∶4对某钢厂100 t底吹氩钢包建立水模型,研究不同底吹位置、吹氩流量对混匀时间和卷渣行为的影响。研究表明:单喷嘴底吹氩,喷嘴位于钢包底部中心0.5R(钢包半径)至0.65R位置时的混匀时间较短;双喷嘴距钢包底部中心0.5R,夹角为180°时的混匀时间较短;相同流量下,单吹混匀时间稍低于双吹;为减轻包壁的侵蚀,喷嘴距包底中心距离最好小于0.65R。在试验条件下得出的最佳吹氩流量是426 L/min,单吹临界卷渣流量为142 L/min,双吹临界卷渣流量为213 L/min,有利于渣钢界面反应的流量应大于284 L/min。
Based on the similar principle, a water model of 100 t bottom-blowing argon steel ladle was established according to 1: 4, and the influence of different bottom blowing position and argon blowing flow on the mixing time and the entrainment behavior was studied. The results show that the mixing time is short when the bottom of the ladle blows argon and the nozzle is located at 0.5R (ladle radius) from the center of the ladle to the position of 0.65R. Time is short; under the same flow rate, the blowing time is slightly lower than double blowing; in order to reduce the erosion of the cladding wall, the distance between the nozzle and the center of the bottom is preferably less than 0.65R. The optimum argon flow rate under the experimental conditions was 426 L / min, the single-roll critical volume flow rate was 142 L / min and the double-flow critical volume flow rate was 213 L / min, which was in favor of the flow rate Should be greater than 284 L / min.