金属薄带双辊连铸复合式电磁侧封的物理模拟

Physical simulation of containment coupling with EMD and solid dam on thin strip continuous casting with twin rolls

针对薄带双辊连铸的辊端金属液侧封问题,采用低熔点合金物理模拟实验,研究单纯的电磁侧封、电磁场复合有机玻璃挡板侧封、电磁场耦合内置或外置铁芯的耐材挡板侧封4种方式下的磁感应强度分布特点和侧封效果。结果表明:电磁场耦合内置铁芯挡板的侧封方式效果最好,可将金属液侧封高度提高3.3倍,且金属液的侧封高度随电流强度线性递增。同时还观察和分析侧封过程中金属液面波动现象。

A model for investigating the containment of molten metal puddle in a twin-roll caster with electromagnetic dam （EMD） coupled with a solid dam was established. The magnetic flux density distribution of electromagnetic field along the yoke surface was measured. The results show that EMD coupled with inside-ferromagnetodam is the best method among the electromagnetic field coupled with vinyl chloride dam, outside-ferromagnetodam, or without any solid dam, which can enhance the height of molten metal about 3.3 times than that without any solid dam. The containment height of molten metal increases linearly with increasing current. The fluctuation on the surface of molten metal was also analyzed.