Separation efficiency of alumina particles in Al melt under high frequency magnetic field  

作　　者：郭庆涛 曹志强 张忠涛 李廷举 金俊泽 HONG Chun-pyo 

机构地区：[1]Center for Computer-Aided Solidification Processing, Metallurgical System Engineering, Yonsei University [2]School of Materials Science and Engineering, Dalian University of Technology

出　　处：《中国有色金属学会会刊：英文版》2010年第1期153-157,共5页Transactions of Nonferrous Metals Society of China

基　　金：Projects(50474055, 50274018) supported by the National Natural Science Foundation of China;Project (20052176) supported by the Natural Science Foundation of Liaoning Province, China

摘　　要：The effects of separation time and magnetic induction intensity on the separation efficiency of alumina particles with diameters varying from 30 to 200 μm in aluminum melt were investigated. The experimental results show that the particle-accumulated layer is formed in the periphery of the solidified specimen when the diameter of the separated molten metal, the magnetic induction intensity and the separation time are 10 mm, 0.04 T and 1 s, respectively. When the separation time is 2 s, the particle-accumulated layer can be observed obviously and the separation efficiency is about 80%. There are few alumina particles in the inner of the solidified specimen when the separation time is 3 s. The separation efficiency higher than 85% can be achieved when the separation time is longer than 3 s. When the magnetic induction intensity is 0.06 T, the visible particle-accumulated layer can be formed in 1 s and the separation efficiency is higher than 95%. The experimental results were compared with the calculated results at last.The effects of separation time and magnetic induction intensity on the separation efficiency of alumina particles with diameters varying from 30 to 200 μm in aluminum melt were investigated. The experimental results show that the particleaccumulated layer is formed in the periphery of the solidified specimen when the diameter of the separated molten metal, the magnetic induction intensity and the separation time are 10 ram, 0.04 T and 1 s, respectively. When the separation time is 2 s, the particle-accumulated layer can be observed obviously and the separation efficiency is about 80%. There are few alumina particles in the inner of the solidified specimen when the separation time is 3 s. The separation efficiency higher than 85% can be achieved when the separation time is longer than 3 s. When the magnetic induction intensity is 0.06 T, the visible particle-accumulated layer can be formed in 1 s and the separation efficiency is higher than 95%. The experimental results were compared with the calculated results atlast.

关 键 词：氧化铝颗粒 分离效率 铝熔体 高频磁场 磁感应强度 分离时间 计算结果 粒子数 

分 类 号：TF821[冶金工程—有色金属冶金]