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基于欧拉-拉格朗日方法的离散相模型,针对锌液体外循环系统下连续热镀锌锅中三种不同类型的锌渣,利用数值模拟的方法计算锌锅中锌渣的浓度差分布.分析锌渣扩散得到了锌渣在带钢表面及锌锅中的运动轨迹和分布规律.结果表明:锌渣在带钢上的沉积率随着锌渣粒度的减小而升高;由于锌渣密度的差异,当锌渣直径小于80μm时,沉积率从高到低依次为悬浮渣、面渣和底渣.面渣在带钢出口后侧区域的平均停留时间最长,在该位置设置抽锌管将有利于面渣的去除;在V形区内侧区域带钢上的悬浮渣质量浓度最高,对带钢影响最大;底渣主要运动区域为锌锅底部,基本不会黏附于带钢表面,对带钢质量影响最小.
Based on the Eulerian-Lagrangian discrete phase model, three different types of dross in continuous hot-dip galvanizing pots under zinc liquid external circulation system were used to calculate the concentration difference of zinc dross in zinc pot by numerical simulation .The movement trajectory and distribution of zinc dross on the surface of steel strip and zinc pot were analyzed.The results show that the deposition rate of zinc dross on the steel strip increases with the decrease of the dross particle size of zinc dross, When the diameter of dross is less than 80μm, the deposition rate is in descending order of suspended slag, dregs and bottom dregs.The average dwell time of dregs in the rear side of strip exit is the longest, Zinc pipe will be conducive to the removal of surface slag; in the V-shaped area on the inner strip of the highest concentration of suspended slag, the strongest impact on the strip; the bottom of the main movement of the zinc pot at the bottom of the basic will not adhere to the strip Surface, the least impact on strip quality.