Clarification of Aluminum Scrap by Electromagnetic Separation for Advanced Recycling

为实现铝的高级回收，对铝液中的夹杂物行为及电磁旋流器消除夹杂物进行了基础和应用研究。在基础研究中，对有害夹杂物Al3Fe的电磁分离、同步辐射对SiC簇的结构分析、固体颗粒在湍流剪切流中的流体动力学行为进行了研究，以获得铝液中夹杂物颗粒行为的学术知识。在电磁旋流器的研制研究中，通过数值模拟和水模型研究，明确了流体在离心力和磁力作用下的流动特性和颗粒向壁面的传递。基于这些结果，制作了一个测试设备，用于分离铝液中的氧化物夹杂物。试验结果表明，该方法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.