铝熔体中金属杂质颗粒在稳恒磁场中的运动状态  

Movement of Metallic Impurity Particles in Aluminum Melt in Steady Magnetic Field

作　　者：张磊[1] 姚广春[1] 焦万丽[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2004年第7期682-684,共3页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目(G199906490-4).

摘　　要：对稳恒磁场中的金属杂质颗粒进行了受力分析,建立了杂质颗粒的运动模型,经过理论计算确定了它们在磁场力的作用下,处于不同流场内的最终运动速度·根据铝熔体的不同的流动状态,分别采用柱塞流模型和轨线模型计算得出了磁场力对杂质颗粒的分离效率·计算结果表明,杂质的运动速度与分离效率和自身的体积、流体的流动状态、杂质颗粒的磁化率、磁场强度及分离通道的宽度密切相关·在相同的熔体流动速度下,杂质颗粒越大,分离效率越高;降低流体的流动速度有利于提高分离效率·A force analysis was made to the impurity particles in Al melt in steady magnetic field to set up the movement models of these particles in different flow field, thus determining their final velocities under the action of magnetic force by theoretic calculation. According to the different fluidic states of aluminum melt, the models of piston flow and trajectory were used to obtain the separating efficiency of impurity particles under the action of magnetic field, respectively. The results showed that the motional velocities and separating efficiency of inclusion particles relate closely to their volume, fluidic state, magnetic suscepbility of inclusions, magnetic field intensity and the width of separation passage. The larger impurity particles had higher separating efficiency with the same motional velocities of Al melt, and reducing the motional velocity of Al melt benefited the separating efficiency.

关 键 词：磁化率 稳恒磁场 磁场力 运动速度 分离效率 

分 类 号：TF777[冶金工程—钢铁冶金]