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以某厂50 t转炉及其四孔氧枪的结构和工艺参数为基础,采用fluent数值模拟方法,重点研究喷孔间距、枪位以及流股融合距离对变角和非变角氧枪射流作用下熔池有效冲击面积的影响规律。研究结果表明:随着枪位的提升,射流对熔池的有效冲击面积将呈现先增加后降低的趋势,从有效冲击面积的角度考虑,应将枪位控制在最大有效冲击面积对应的枪位以内;流股融合距离对于熔池的冲击面积影响显著,融合距离越长,流股中心线与氧枪轴线的偏移越大,射流对熔池冲击形成的凹坑面积越大;随着喷孔间距的减小,射流对熔池的有效冲击面积逐渐减小;喷孔间距越大,射流速度的波动性越大,减小喷头的喷孔间距可以使速度更快趋于稳定;变角氧枪的有效冲击面积值明显大于非变角氧枪。
Based on the structure and process parameters of a 50 t converter and its four-hole oxygen lance, a fluent numerical simulation method was used to study the effect of lance spacing, gun position and stream fusion distance on the variation and non- Under the influence of the effective impact area of the molten pool. The results show that with the increase of the gun position, the effective impact area of the jet to the molten pool will first increase and then decrease. From the perspective of the effective impact area, the gun position should be controlled at the gun position corresponding to the maximum effective impact area ; The fusion distance of the stream has a significant impact on the impact area of the weld pool. The longer the fusion distance is, the larger the deviation of the center line of the stream from the axis of the oxygen lance and the larger the area of the pit formed by the impact of the jet on the weld pool; The distance between the holes decreases and the effective impact area of the jet on the molten pool decreases gradually. The larger the distance between the nozzles is, the greater the fluctuation of the jet velocity is. The smaller the distance between the nozzles of the nozzles can stabilize the speed faster and faster. Oxygen lance effective impact area is significantly larger than the non-variable angle lance.