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针对钢液中微小非金属夹杂物难以去除的问题,采用高速摄像机和速度分析软件对超声波钢包精炼水模内夹杂物粒子与空化气泡的相互作用行为进行了研究,结果表明:变幅杆式超声波产生的空化气泡形成时,在传振杆底端呈圆锥状分布,空化泡直径在1μm左右,远小于底吹气产生的气泡直径;随着超声功率增大,空化强度增大,生成空化气泡数量增多,气泡分散度增加,有利于去除微小夹杂物;瞬态空化气泡崩溃后,形成的小空化气泡吸附面积增大,与夹杂物碰撞概率增加,可促进夹杂物尤其是微小夹杂物的上浮排出;稳态与瞬态空化气泡均可促进夹杂物的上浮排出。
Aiming at the problem that the tiny non-metallic inclusions in molten steel are hard to remove, the interaction between inclusion particles and cavitation bubbles in the ladle refining ladle is studied by using high-speed camera and speed analysis software. The results show that: When the cavitation bubble generated by ultrasonic wave is formed, there is a conical distribution at the bottom of the transmission rod. The diameter of the cavitation bubble is about 1μm, which is much smaller than the diameter of the bubble generated by the bottom blowing gas. As the ultrasonic power increases, the cavitation intensity increases , The number of cavitation bubbles generated increased, the bubble dispersion increased, is conducive to the removal of small inclusions; transient cavitation bubble collapse, the formation of small cavitation bubble adsorption area increases, the probability of collision with inclusions increases, can promote inclusions In particular, small inclusions floating discharge; steady state and transient cavitation bubbles can promote the inclusion of floating up.