Study of electromagnetic separation of nonmetallic inclusions from aluminum melt
Study of electromagnetic separation of nonmetallic inclusions from aluminum melt
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DOI：
10.1007/s11661-999-0135-4
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发表时间：
1999-11-01
影响因子：
2.8
通讯作者：
Zhou, YH
中科院分区：
文献类型：
--
作者：
Shu, D;Sun, BD;Zhou, YH
本文对几种利用电磁分离铝熔体中非金属夹杂物概念的方法进行了分析研究和比较。通过施加不同类型的电磁场，即每种方法的夹杂物颗粒的迁移率。计算了稳定磁场下的直流电场、交流磁场和交流电场，并与重力沉降速度进行了比较。分析并说明了电磁场施加时间、圆管半径、电磁力大小等各种操作参数对夹杂物去除效率的影响。研究发现，去除效率随着施加时间的增加而增加，并随着管道半径的增加而急剧下降，特别是对于交流电场方法。就去除小夹杂物而言，交流磁场法是最有利的一种，因为它的去除效率对颗粒尺寸的依赖性最小。但需要较高的频率才能获得最佳结果，a/delta 的最佳值在 2 至 3 范围内。
Several methods using the concept of electromagnetic separation of nonmetallic inclusions from an aluminum melt were analytically studied and compared in this article. The migration rate of inclusion particles for each method by exerting different types of electromagnetic field, viz. DC electric field with steady magnetic field, AC magnetic field, and AC electric field, was calculated and compared with the gravity settling velocity. Effects of various operating parameters, such as the imposing time of electromagnetic field, the radius of circular pipe, and the magnitude of electromagnetic force, on inclusion removal efficiency were analyzed and illustrated for each case. It was found that the removal efficiency increases with the increase of imposing time and decreases dramatically with the increase of pipe radius, especially for the AC electric field method. As far as the removal of small inclusions is concerned, the AC magnetic field method is the most favorable one because it has the least dependence of removal efficiency upon the particle size. However, high frequency is needed in order to get the optimum results, and the best values of a/delta are in the range of 2 to 3.