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运用CFX计算软件研究了大通钢量工况下板坯浸入式水口流场,分析了水口结构、结晶器流动控制方式、水口吹氩等对浸入式水口流场的影响。研究表明,适宜的水口结构和控流方式组合能获得最优的水口出口流股形态和稳定均衡的流场。在大通钢量下,塞棒、底部凸起水口结构是最佳组合。不适宜的工艺组合形成并加重水口偏流,造成结晶器初始坯壳的不均匀冲刷和液面涡流,进一步诱发水口堵塞、水口结瘤、结晶器非稳态和不均衡传热,最终导致铸坯缺陷甚至诱发拉漏事故。
The CFX calculation software was used to study the flow field of the slab submerged entry nozzle under the condition of the mass capacity of the steel. The influence of nozzle structure, mold flow control mode and nozzle blowing argon on the flow field of the submerged entry nozzle was analyzed. The research shows that the optimum combination of nozzle structure and flow control mode can obtain the optimal outlet flow shape and stable flow field. In the Chase the amount of steel, stopper rod, the bottom of the protruding nozzle structure is the best combination. Inappropriate process combinations create and increase the drift in the nozzle, causing uneven scouring of the initial shell of the mold and vortex on the surface, further inducing blockage of the nozzle, nozzle nodules, instability of the mold and unbalanced heat transfer, Defects even induced pullout accident.