旋转磁场用于原铝净化的研究  

Purification of Aluminium Melt by Addition of a Rotating Electromagnetic Field

作　　者：翟秀静[1] 符岩[1] 李鸿斌[2] 侯景星 

机构地区：[1]东北大学材料与冶金学院，辽宁沈阳110004 [2]包头铝厂，内蒙古包头014000

出　　处：《东北大学学报（自然科学版）》2002年第11期1083-1085,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：根据电磁流体力学的基本理论,研究了在旋转磁场作用下原铝熔体的净化过程·分析了体系的电磁力和重力的影响因素,研究了铝熔体中杂质铁和硅的物理性能·分析表明,原铝中杂质铁以Al3Fe的形式存在,而杂质硅以单质形式存在·在分析了重力、电磁力和离心力的综合作用后,利用电磁力与偏析的共同作用实现了原铝中杂质铁和硅的分离·考查了主要影响因素,即磁场强度、凝固时间、气隙大小和坩埚位置等·研究结果表明,旋转磁场作用下的原铝熔体偏析净化的方法综合了电磁力、重力和偏析的共同作用,它可以使原铝中Fe和Si的质量分数由0 16%降至0 05%·?According to the basic theory of magnetohydrodynamics,the purification mechanism and efficiency of Aluminium molten under rotating electromagnetic field were studied. The electromagnetic force and the gravity of the system were analysied on impurities(Fe and Si)in the aluminium molten. It is shown that impurities Fe and Si are separated from the aluminium molten by effects of the electromagnetic stirring and segregation. The main factors including the electromagnetic field strength,solidifying time,size of coil gap and crucible position were examined to get the best purification result. The results show that the rotating electromagnetic field could be used to purify aluminium efficiently. The segregation purification method of rotating electromagnetic field includes electromagnetic force,gravity force and segregation action so as to reduce impurities Fe and Si from 016% to 005%.

关 键 词：旋转磁场 原铝净化 精铝 电磁冶金 Fe和Si杂质 

分 类 号：TF821[冶金工程—有色金属冶金]