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电磁搅拌对连铸结晶器内钢液液面波动有重要的影响。以某钢厂直径为250mm连铸圆坯结晶器及电磁搅拌器的相关参数为原型,采用湍流模型与多相流模型相结合的方法对电磁搅拌作用下连铸结晶器内钢液液面波动行为进行研究,分析了电磁搅拌作用下钢液液面产生变化的成因。研究结果表明:电磁搅拌作用下钢液液面呈旋转抛物面,与无电磁搅拌作用下的液面截然不同;电磁搅拌作用下钢液液面波动实质上是电磁搅拌电磁力作用的结果。水口附近液面波动会随着电磁搅拌强度的增大而增强,达到一定值时出现卷渣现象。在实际生产过程中,为获得较好的搅拌效果,应考虑结晶器内的液面波动及卷渣行为。
Electromagnetic stirring has an important influence on the liquid level fluctuation in continuous casting mold. Taking the relevant parameters of continuous casting round billet mold and electromagnetic stirrer with a diameter of 250 mm as the prototype of a steel mill as the prototype, the turbulence model was combined with the multi-phase flow model to simulate the liquid level fluctuation in the continuous casting mold under electromagnetic stirring Behavior of the research, analysis of the electromagnetic stirring under the liquid level changes cause. The results show that the liquid surface of the liquid steel is a rotating paraboloid under electromagnetic agitation, which is quite different from the liquid surface under the condition of no electromagnetic agitation. The liquid surface fluctuation under the electromagnetic agitation is essentially the result of the electromagnetic force of electromagnetic agitation. Fluctuations in the liquid near the nozzle will increase with the increase of the intensity of the electromagnetic stirring. When a certain value is reached, entrainment phenomenon occurs. In the actual production process, in order to obtain a better mixing effect, the fluctuation of liquid level in the mold and the entrainment behavior should be considered.