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利用FLUENT对1400mm×230mm的板坯结晶器建立了描述结晶器内钢液流动的三维数学模型,以液体表面流速和射流冲击深度为主要参考指标,研究了拉速和水口插入深度对结晶器内流场的影响。结果表明:随拉速的增加,表面最大流速增大,射流冲击深度增加。当拉速超过1.2m/min时,表面最大流速增加明显;随着浸入式水口浸入深度的增加,表面最大流速减小,射流冲击深度减小,当浸入深度超过140mm时,表面流速减小明显。故满足断面要求的合理工艺参数:拉坯速度不大于1.2 m/min,且插入深度不小于140mm。
Using FLUENT, a three-dimensional mathematical model describing the flow of molten steel in the mold was established for a 1400mm × 230mm slab mold. The flow rate and jet impact depth of the liquid were taken as the main reference to study the effect of casting speed and nozzle insertion depth on the mold Influence of flow field. The results show that with the increase of casting speed, the maximum flow velocity on the surface increases and the jet impact depth increases. When the pulling speed exceeds 1.2m / min, the maximum flow velocity increases obviously. With the increase of immersion depth, the maximum flow velocity decreases and the impact depth decreases. When the immersion depth exceeds 140mm, the surface velocity decreases obviously . Therefore, to meet the requirements of section reasonable process parameters: casting speed of not more than 1.2 m / min, and the insertion depth of not less than 140mm.