【摘要】 涡电流分选技术是回收有色金属的关键技术，具有运行成本低、处理量高、无二次污染等优点.磁辊作为涡电流分选机的核心部件，决定了物料的分选效率和回收品位，因此优化其结构参数至关重要.通过建立磁辊的有限元仿真模型，分析了背铁厚度s、磁极厚度d、磁极对数p和等磁辊参数对磁场强度及分布的影响规律；并以磁感应强度和频率的组合参数(B~2f)作为涡流力评价指标，优化了磁辊的结构参数.研究结果表明：涡流力随磁辊半径的增加而增加；在磁辊半径不超过148 mm条件下，磁辊的最佳结构参数为背铁厚度20 mm、磁极厚度60 mm、磁极对数8对.更多还原

【Abstract】 The eddy current separation is the key technology to recover nonferrous metals, it has the advantages of low operating cost, high throughput, and no secondary pollution. The magnetic roller which is the core components of the eddy current separator, determines the efficiency and grade of nonferrous metal recovery. Therefore, it is very important to optimize its structural parameters. In this study, a finite element simulation model of the magnetic roller was established, and the combined parameter(B~2f) of the magnetic field intensity and frequency is used as an evaluation index of eddy current force. The combined parameter(B~2f) is analyzed with different thickness of the back iron(d), the thickness of the magnet(s), and the number of magnetic poles(p). The research results show that the eddy current force increases with the increase of the radius of the magnetic roller. When the radius of the magnetic roller is less than 148 mm, the best combination of back iron thickness, magnet thickness and magnetic pole number is 25 m, 60 mm and 8 pairs.更多还原