福建某超贫磁铁矿弱磁精反浮选提铁降硅试验  

Experiments on Reverse Flotation of Concentrate of Low Intensity Magnetic Separation for Iron Increasing and Silicon Reducing of an Ultra-low-grade Magnetite in Fujian

作　　者：廖祥[1] 刘艳杰[1] 许蕊[2] 杨崇[3] 秦磊[1] 李宝安[1] 

机构地区：[1]武汉理工大学资源与环境工程学院 [2]武汉纺织大学环境工程学院 [3]华南理工大学环境与能源学院

出　　处：《金属矿山》2013年第5期75-77,共3页Metal Mine

摘　　要：福建某微细粒嵌布的超贫磁铁矿弱磁选精矿铁品位为65.30%,SiO2含量高达8.52%,是影响精矿品质的主要因素。对弱磁选精矿试样进行了反浮选提铁降硅工艺技术条件研究。结果表明,采用1粗1精3扫、中矿顺序返回的反浮选闭路流程处理该试样,最终获得了铁品位为68.97%、回收率为98.25%、含SiO23.35%的铁精矿,尾矿铁品位仅有16.39%、回收率仅有1.75%,试验取得了显著的提铁降硅效果。After the ultra-low-grade magnetite of micro-fine-grained disseminated in Fujian province was separated by low intensity magnetic separation. Fe grade of the concentrate was 65.30% ,while the silica content was up to 8.52% , which is the major factor affecting the concentrate quality. For the concentrate of low intensity magnetic separation, technical conditions of reverse flotation for iron increasing and silicon reducing was explored. The results indicated that through the closed-circuit reverse flotation of one roughing, one cleaning and three scavengings and middles back to the flow-sheet in turn, iron concentrate with Fe grade of 68.97% , recovery of 98.25% and silica content of 3.35% was obtained, while rail- ings with Fe grade of just 16.39% and recovery rate of 1.75% was gained as well. A remarkable effect of iron increasing and silicon reducing is obtained in the experiment.

关 键 词：弱磁选精矿 石英 提铁降硅 反浮选 

分 类 号：TD981[矿业工程—选矿]