司家营铁矿氧化矿石选矿流程优化研究  

Study on Process Optimization of Oxidation Ore in Sijiaying Iron Mine

作　　者：于忠涛 YU Zhongtao(Sijiaying North Branch of Hebei Iron and Steel Group Mining Company)

机构地区：[1]河钢矿业司家营北区分公司

出　　处：《现代矿业》2022年第4期16-19,共4页Modern Mining

摘　　要：为了解决司家营铁矿氧化矿分选流程中螺旋溜槽重选、脱硫磁选、反浮选和重选精矿脱粗筛分工艺所存在的问题,在研究论证的基础上提出了流程优化改造建议:将现场螺旋溜槽扫选设备改用于粗选作业,且确保该作业分矿均匀、给矿浓度适当(50%~55%);取消脱硫磁选作业,消除已单体解离的赤褐铁矿物返回二段磨矿系统,从而降低磨矿成本、减少铁矿物流失;提高细粒物料磁选磁场强度,减少细粒、微细粒赤褐铁矿物在磁选作业的流失,强化反浮选对赤褐铁矿物的回收;建议控制重选精矿脱粗筛筛分粒度在0.09~0.10 mm,并提高筛分效率,提高最终重选精矿品位和产率,减少综合精矿对反浮选精矿品质的依赖,及因现场重选精矿脱粗筛脱粗效果不理想带来的一系列问题。In order to solve the problems of spiral chute gravity separation,desulphurization magnet⁃ic separation,reverse flotation and coarse screening for gravity concentrate exist in the separation process of oxidized ore in Sijiaying Iron Mine,suggestions for process optimization and transformation were put for⁃ward on the basis of research and demonstration.The on-site spiral chute scavenging equipment is changed to rough separation operation,and ensure that the ore sorting is uniform and the concentration of ore feed⁃ing is appropriate(50%~55%).Cancel the desulphurization magnetic separation operation,and eliminate the monomer dissociated hematite minerals to return to the second stage grinding system,so as to reduce the grinding cost and reduce the loss of iron minerals.Improve the magnetic field intensity of fine material magnetic separation,reduce the loss of fine and micro-fine hematite minerals in magnetic separation opera⁃tion,strengthen the recovery of hematite minerals by reverse flotation.It is suggested to control the particle size of gravity separation concentrate in the range of 0.09~0.10 mm,improve the screening efficiency,im⁃prove the grade and yield of final gravity separation concentrate,and reduce the dependence of comprehen⁃sive concentrate on the quality of reverse flotation concentrate and a series of problems caused by unsatis⁃factory coarse removal effect of on-site gravity separation concentrate.

关 键 词：氧化矿 磁铁矿 赤褐铁矿 螺旋溜槽重选 脱硫磁选 微细粒铁矿物流失 脱粗 筛分 

分 类 号：TD951[矿业工程—选矿]