Clarification of Aluminum Scrap by Electromagnetic Separation for Advanced Recycling

为实现先进的铝回收利用，对铝熔体中夹杂物行为及其电磁旋风除杂进行了基础性和应用性研究。在基础研究中，通过有害夹杂物的电磁分离、Al_3Fe的电磁分离、碳化硅团簇的同步辐射结构分析、固体颗粒在湍流剪切流中的流体动力学行为等方面的研究，获得了夹杂物颗粒在铝熔体中行为的理论知识。在电磁旋风分离器的发展研究中，通过数值模拟和水模型试验研究了离心力和磁场力作用下的流体流动特性和颗粒向壁面的迁移。在此基础上，研制了一套从铝液中分离氧化物夹杂物的试验装置。试验证明，该分离器具有较高的分离效率。

Fundamental and applied researches have been made of inclusion behaviors in molten aluminum and their elimination by electromagnetic cyclone to realize the advanced aluminum recycling. In the fundamental studies, electromagnetic separation of harmful inclusion, Al3Fe, structural analysis of SiC cluster by the synchrotron radiation, and fluid-dynamic behavior of solid particle in a turbulent shear flow have been made to obtain academic knowledge of inclusion particle behaviors in molten aluminum. In the development study of the electromagnetic cyclone, numerical simulation and water model study have been performed to make clear the fluid-flow characteristics and particle transfer toward the wall by centrifugal and magnetic forces. Based on these results, a test equipment has been fabricated and utilized for separating oxide inclusions from molten aluminum. High separation efficiencies have been verified by the test.