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采用数值模拟软件Fluent建立了一个瞬态的三维数学模型,对100 t氧气顶吹转炉流场进行数值模拟。通过改变氧枪枪位和氧枪喷孔夹角,得出相应的冲击深度和冲击面积以及熔池内部速度分布。结果表明,在相同的条件下,随喷吹枪位的升高,射流形成的钢液凹坑直径变大,而冲击深度变小;随喷孔夹角的增大,射流冲击直径变大,而冲击深度减小。低枪位有利于增大熔池上层钢液流速,高枪位利于促进熔池下部钢液流动;喷孔夹角增大利于增大熔池表层高速区面积,但熔池中心底部低速区面积也随之增大。
A transient three-dimensional mathematical model was established by numerical simulation software Fluent to simulate the flow field of a 100 t oxygen-top converter. By changing the angle between the lance and the lance, the corresponding impact depth and impact area as well as the velocity distribution inside the ladle are obtained. The results show that under the same conditions, with the increase of injection lance, the dimple diameter of the liquid steel formed by the jet becomes larger and the impact depth becomes smaller. With the increase of the jet orifice angle, the jet impact diameter becomes larger, While the impact depth decreases. Low gun position is conducive to increasing the molten steel flow rate above the molten steel, high gun position is conducive to promoting the molten steel flow at the lower part of the molten pool; spray hole angle is conducive to increasing the surface area of high speed molten pool, but the bottom of the melt pool low area area Also will increase.