斜环永磁高梯度磁选机的原理及应用  

High-gradient permanent magnetic separator with inclined cylinder and its application

作　　者：伍喜庆[1] 米夏夏[1] 杨斌[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2011年第9期2537-2542,共6页Journal of Central South University:Science and Technology

基　　金：教育部留学回国人员基金资助项目(2005)

摘　　要：介绍新型斜环永磁高梯度磁选机的基本结构,分析磁性矿粒在复合力场中的受力和捕获机理,测试该设备对某铁矿尾矿的磁选效果。该磁选机为永磁磁系,分选环为倾斜配置且分选环倾斜角度和转速可调;分选时,磁介质在底部磁场区捕收磁性矿粒,旋转到顶部非磁场区冲洗卸矿。研究结果表明:调节分选环的倾斜角度可改变磁性矿粒所受各作用力的大小,从而调节磁选粒度的下限和磁选作业的回收率;当原矿铁品位为17.81%时,经一次磁选可获得回收率为65.05%、全铁品位为29.53%的磁选精矿。该磁选机设计合理、节能,可实现连续给矿、分选和排矿。The structure of a high-gradient permanent magnetic separator with inclined cylinder（HGPMSIC） was described,the load conditions and capture mechanism of mineral particles in a compound force field were analyzed,and magnetic separation effect of tailings containing iron by the HGPMSIC was tested.The inclination angle and rotational speed of separation cylinder,which was attached to the HGPMSIC,were adjustable.Magnetic particles were attracted by magnetic media in the inner bottom of the cylinder due to the presence of magnetic field and then washed down by pressured water after rotation into the inner top wall with nearly non-magnetic field.The mechanics analysis of mineral particles in the compound force field indicates that the lower limit of particle size（i.e.finest particle） recoverable by the HGPMSIC is controllable by adjusting the inclination of the separation cylinder.The test results of reclaiming iron minerals from a tailings containing iron by the HGPMSIC show that for a tailings with a content of 17.81% iron as feed,a magnetic concentrate with TFe grade of 29.53% and recovery of 65.05% are obtained after one time magnetic separation.The design of the magnetic separator is reasonable,and it operates well continuously through feeding,separating and discharge sub-processes.

关 键 词：斜环 磁选 永磁高梯度磁选机 弱磁性矿物 尾矿利用 

分 类 号：TD457[矿业工程—矿山机电]