磁力螺旋溜槽及其对细粒磁性物料的回收  

Magnetic spiral chute and its application in recovery of fine magnetic materials

作　　者：伍喜庆[1] 黄志华[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）》2007年第6期1083-1087,共5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：在普通螺旋溜槽的槽面上附加磁场,得到磁力螺旋溜槽(MSC)。与普通螺旋溜槽相比,MSC使磁性物料能够得到更有效的回收。其选矿的原理是:当磁性矿物经过磁场时,在磁场力的作用下,磁性成分被吸引(不要吸住)到溜槽的底部从而进入二次环流,利用二次环流将磁性物料运到溜槽内部,进入精矿中。对纯的磁铁矿试验的结果表明:磁场强度、溜槽螺旋圈数和给矿浓度等因素都对磁力螺旋溜槽的性能产生影响;尤其是磁场能够有效地减少尾矿中磁性成分的含量,提高磁性成分的回收率,增大磁性铁的回收率,且精矿中锌的品位从5.9%降低到1.8%。Magnetic spiral chute （MSC） made by attaching a proper magnetic field to traditional spiral chute is able to efficiently increase the recovery of magnetic components. The main mechanism of the MSC＇s recovery of magnetic materials is that magnetic particles are drawn to the bottom of spiral trough because of the presence of magnetic force, and they join in the secondary circumfluence while they pass through the magnetic fields, and consequently they are carried by the secondary circumfluence to the inner side of the trough and enter the magnetic concentrate outlet. The test result of pure magnetic iron ores shows that these factors such as magnetic field intensity, spiral number and feed concentration affect the result. The separation of blast furnace dust indicates that it not only increases the recovery of magnetic iron, but also reduces the grade of zinc in the magnetic concentrate from 5.9% to 1.8 %.

关 键 词：磁力螺旋溜槽 细粒磁性物料 高炉瓦斯泥 铁矿石 回收 

分 类 号：TD922[矿业工程—选矿] TD951