摘要
为使程潮选矿厂的精矿球团满足氢基竖炉对品质的要求,在对现场精矿进行详细分析的基础上,采用悬浮磁精选机进行了精选试验。结果表明,试样不磨矿,直接进行2段悬浮磁精选机精选,可获得品位为68.63%、回收率为96.51%的精矿,并产生品位为36.11%、回收率为3.49%的精选尾矿;试样在磨矿细度为-37μm占75%、上升水流为12 L/min、磁场强度为8.8 kA/m情况下进行2段悬浮磁精选机精选,可获得品位为68.71%、回收率为98.81%的精矿,品位为18.38%的尾矿经磁选管再选可降至14.62%,获得的品位为51.06%、流程回收率为0.34%的低品位精矿可返回再磨作业。虽然2个流程均能获得符合目标要求的精矿,但有预先磨矿的流程不仅精矿品位略高,且回收率高2.3个百分点,因此,该流程有一定的优越性。
In order to make the pellets in Chengchao Iron Mine meet the requirement of hydrogen base shaft furnace in terms of quality,on the basis of detailed analysis of on-site concentrate,the concentration test was carried out by using magnetic levitation separator.The results showed that concentrate with grade of 68.63%and recovery rate of 96.51%could be obtained directly by two-stage cleaning with magnetic levitation separator without grinding,and tailings with grade of 36.11%and recovery rate of 3.49%could be produced.Under the conditions of grinding fineness of-37μm accounting for 75%,rising flow of 12L/min and magnetic field intensity of 8.8 k A/m,by two-stage cleaning with magnetic levitation separator,concentrate with grade of 68.71%and recovery rate of 98.81%was obtaine.And the grade of tailings is18.38%and can be reduced to 14.62%after magnetic separation reselection.The low grade concentrate with a grade of 51.06%and process recovery rate of 0.34%can be returned to the regrinding operation.Although the two processes can obtain the concentrate meeting the target requirements,the process with pregrinding not only has slightly higher concentrate grade,and the recovery rate is 2.3 percentage points higher,so the process has certain advantages.
作者
李鹏飞
陈兴
黄雯
陈铁军
李超前
郑德亮
LI Pengfei;CHEN Xing;HUANG Wen;CHEN Tiejun;LI Chaoqian;ZHENG Deliang(Chengchao Mining Co.,Ltd.,Wuhan Iron and Steel Resources Group;School of Resources and Environmental Engineering,Wuhan University of Science Technology;LONGI Magnet Co.,Ltd.)
出处
《现代矿业》
CAS
2023年第2期5-8,共4页
Modern Mining
基金
湖北省重点研发计划项目(编号:2022BCA062)。
关键词
磁铁精矿
球团
氢基竖炉直接还原
磁悬浮精选机
magnetite concentrate
pellet
direct reduction with hydrogen base shaft furnace
magnetic levitation separator
