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基于群体平衡模型,在奥斯特瓦尔德熟化的基础上,考虑布朗碰撞对分子扩散长大的影响,建立了钢液中Al2O3夹杂物碰撞生长的动力学模型,包括分子扩散长大以及由于布朗、斯托克斯和湍流碰撞引起的夹杂物聚集、生长,采用颗粒尺寸分组法对夹杂物的聚集生长进行了模拟.结果表明,湍动能耗散率从0.1 m2/s3增加到10 m2/s3时,对临界尺寸以下粒径的分子微粒的数量密度影响较小,但对临界尺寸以上大粒径夹杂物分子微粒的数量密度影响较大.碰撞过程中,夹杂物最大数量密度对应的极值直径约为0.2μm.
Based on the population balance model, based on the Ostwald ripening, the kinetic model of collision growth of Al2O3 inclusions in molten steel was established considering the influence of Brownian collision on the molecular diffusion and growth, including the molecular diffusion and growth, , And the aggregation and growth of inclusions caused by the collisions of Stokes and turbulence were simulated by particle size grouping method.The results show that the turbulent kinetic energy dissipation rate increases from 0.1 m2 / s3 to 10 m2 / s3 , The effect on the number density of molecular particles below the critical size is small, but the number density of the large size inclusions above the critical size has a greater impact on the number density of the molecular particles.In the collision process, the maximum number density of inclusions corresponds to the extreme value The diameter is about 0.2 μm.