磁力螺旋溜槽及其对细粒磁性物料的回收.pdfVIP

第 38 卷第 6 期 中南大学学报自然科学版( ) Vol.38 No.6 2007 年 12 月 J. Cent. South Univ. (Science and Technology) Dec. 2007 磁力螺旋溜槽及其对细粒磁性物料的回收 伍喜庆，黄志华 ( 中南大学 资源加工与生物工程学院，湖南 长沙，410083) 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%。 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 中图分类号：TD922; TD951 文献标识码：A 文章编号：1672-7207(2007)06−1083−05 Magnetic spiral chute and its application in recovery of fine magnetic materials WU Xi-qing, HUANG Zhi-hua (School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: 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 sep