中文摘要：

结晶器保护渣是连铸过程中非常重要的功能材料。采用旋转黏度测试仪结合MoSi2高温炉及高频加热炉分别研究传统无磁场条件及高频磁场条件下保护渣的黏度特性，并运用有限元软件数值模拟高频磁场作用下保护渣的流场。结果发现：高频电磁场作用下保护渣黏度显著升高。二元碱度在0．66—0．91范围内，1300℃黏度升高幅度随碱度增加而增加，而熔化性温度升高幅度随碱度增加而降低。电磁力打乱了保护渣有序的离子结构，使得离子速率增加，是导致保护渣黏度大幅增加的主要原因。

英文摘要：

Mould flux is a very important function material in continuous casting process. The viscosity of flux under high frequency electromagnetic field were tested by rotational viscosity tester and a measure- ment device for electromagnetic characteristics of flux viscosity under high temperature conditions. With finite element finite element, the flow field of flux under high frequency electromagnetic field were simu- lated. The results show that high frequency electromagnetic field make the flux viscosity rising significant- ly. With basieity rising（R =0.66 -0.91 ）, the viscosity increasing rate at 1 300 ~C grows larger, but the melting temperature incressing rate decreasing gradually. It may be the main reason for the significant in- creasing of flux that the electromagnetic forces disrupt the ordered structure of flux and make the ion rate inereaseing.