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建立了板坯连铸结晶器电磁制动的电磁场的计算模型,分析在恒定电流作用条件下,结晶器内磁感应强度的分布情况,并与实测数据进行了对比。在不同电流作用下,讨论了结晶器内不同截面上磁感应强度的变化情况。结果表明:板坯结晶器电磁制动的磁场在铁芯处最大,并且在上下轭铁间形成了完整、封闭的磁回路,磁感应强度沿着结晶器高度方向呈现出类正弦分布的特征。在制动电流为300~700 A的工艺条件下,在距离结晶器上口约400~450 mm处,磁感应强度接近于0,此处的上部和下部区域内的磁感应强度的方向相反。电流大小的变化只会改变磁感应强度的大小,不会改变其分布,结晶器内磁场主要集中在水平方向,其它方向的分量较小。
The calculation model of the electromagnetic field of the slab continuous casting mold was established. The distribution of the magnetic induction intensity in the mold under the action of constant current was analyzed and compared with the measured data. Under the action of different currents, the changes of the magnetic flux density in different sections of the mold are discussed. The results show that the magnetic field of the electromagnetic brake of the slab mold is the largest at the core, and a complete and closed magnetic circuit is formed between the upper and lower yokes. The magnetic induction intensity exhibits sinusoidal distribution along the height of the mold. Under the condition of braking current of 300 ~ 700 A, the magnetic flux density is close to 0 at the distance of about 400 ~ 450 mm from the top of the mold. The directions of magnetic flux density in the upper and lower regions are opposite. The change of the current size will only change the magnitude of the magnetic flux density and will not change its distribution. The magnetic field in the mold mainly concentrates in the horizontal direction and the components in other directions are smaller.