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连铸钢包浇注末期出现的旋涡卷渣现象会对连铸钢水质量产生重要的影响,为了有效控制生产中的旋涡卷渣现象,对钢包浇注末期旋涡的产生机理开展详细研究。依据相似原理,构建了相似比为1∶6的钢包物理模型,对钢包浇注过程中旋涡产生及卷渣过程进行研究,分析了初始液面高度、出水口尺寸与布置位置、出水口结构等因素对旋涡形成规律的影响。结果表明:旋涡形成过程与初始液面高度无关;钢包出水口尺寸和布置位置对于旋涡形成过程影响显著。随着出水口直径的增大,旋涡临界高度逐渐增加;随着偏心率的增加,旋涡临界高度逐渐降低,最佳偏心率为3/4。提出三片挡块式出水口结构,可以显著降低钢包浇注末期的旋涡临界高度,降低高度达50%左右。
The phenomenon of vortex entrainment in the last stage of continuous casting ladle casting will have an important influence on the quality of continuous casting molten steel. In order to effectively control the vortex entrainment phenomenon in production, the generation mechanism of vortex at the late stage of ladle pouring is studied in detail. Based on the principle of similarity, a physical model of ladle with similar ratio of 1: 6 was constructed to study the vortex generation and entrainment process during the ladle pouring process. The factors such as the initial liquid level, the outlet size and arrangement, the outlet structure and other factors The influence of vortex formation law. The results show that the vortex formation process has nothing to do with the initial liquid level. The size and arrangement of ladle outlet have a significant influence on the vortex formation process. With the increase of outlet diameter, the critical height of vortex increases gradually. With the increase of eccentricity, the critical height of vortex decreases and the optimum eccentricity is 3/4. Proposed three pieces of block outlet structure can significantly reduce the critical height of the vortex at the end of ladle pouring, reducing the height of about 50%.