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采用格子Boltzmann方法对钢液中夹杂物上浮及上浮过程中的碰撞行为进行直接数值模拟研究.结果表明,不同尺寸夹杂物颗粒上浮速度的模拟结果和理论值基本一致,表明本文所采用的数值算法能够精确有效地对钢液中固相夹杂物颗粒运动行为进行研究.当钢液中直径为80μm的夹杂物颗粒位于直径为40μm的下方并一起上浮时,直径为80μm的夹杂物颗粒会逐渐追赶上直径为40μm的夹杂物颗粒并发生碰撞形成大尺寸凝聚体,凝聚体的上浮速度显著大于二者单独上浮时的上浮速度.对于直径为40μm的夹杂物来说,形成凝聚体后的上浮速度比单独上浮时的上浮速度增加300%.实际炼钢过程中,采取必要的措施增加夹杂物颗粒之间上浮过程中的碰撞凝聚,对于提高夹杂物颗粒的上浮速度,尤其是小尺寸夹杂上浮去除速度,提高钢液的洁净度具有重要的意义.
The lattice Boltzmann method was used to directly simulate the collision behavior of the inclusions in the molten steel during the ascending and descending process.The results show that the simulation results of the particle up-going velocity of the inclusions of different sizes are basically consistent with the theoretical values, indicating that the numerical algorithm Which can precisely and effectively study the movement of solid-phase inclusions in molten steel.When the inclusions with a diameter of 80μm in the molten steel are located below the diameter of 40μm and floating together, the inclusion particles with a diameter of 80μm will catch up gradually The inclusions with a diameter of 40μm collide with each other to form a large size agglomerate, and the agglomerates are floated at a significantly higher speed than the floating speed when they are separately floated. For the inclusions with a diameter of 40μm, the floating speed Which is 300% higher than that when floating alone.In the actual process of steelmaking, the necessary measures are taken to increase the collision and cohesion during the floating process between the inclusion particles, which can improve the floating speed of the inclusion particles, especially the small size inclusion floating removal Speed, improve the cleanliness of liquid steel is of great significance.