报废汽车薄壁异形铜铝件涡电流分离机理

Eddy current separation mechanism on thin-wall shaped copper-aluminum mixture in end-of-life vehicles

随着报废汽车的迅猛增长,高效、低耗的破碎分离技术将成为其未来资源化的主流发展方向之一。涡电流分离技术在有色金属颗粒料分选方面优势明显,但在报废汽车破碎铜铝件的高效分离方面仍有待进一步研究。通过建立单个永磁体磁场的计算模型结合仿真工具研究得到扇形、矩形永磁体以两种方式排布于磁辊上时的磁场强度及其空间分布规律。结果表明:Halbach阵列排布较N-S交替排布更适合于大尺寸异形薄壁铜铝件的分离;通过涡流力计算模型,计算得到涡电流分离过程中铜铝件理想运动状态下的最大分选尺寸。研究结果为报废汽车破碎铜铝件的有效分离提供一定的理论依据。

With the rapid growth of end-of-life vehicles(ELVs),the efficient and low-cost crushing and separation technology will become one of the mainstream development directions for its future.The eddy current separation technology has obvious advantages in the sorting of non-ferrous metal particles,but it still needs further research on the efficient separation of scrapped copper-aluminum parts for ELVs.By calculating the magnetic field of a single permanent magnet and the simulation tool,the magnetic field strength and spatial distribution of the fan-shaped and rectangular permanent magnets arranged on the magnetic roller in two ways are obtained.The results show that the Halbach array is arranged alternately with N-S.The cloth is more suitable for the separation of large-sized and shaped thin-walled copper-aluminum parts.The maximum sorting size of the copper-aluminum parts under the ideal motion state is calculated by the eddy current force calculation model.The research results provide a theoretical basis for the effective separation of scrapped copper-aluminum parts for ELVs.