内蒙古某低品位铁矿选铁工艺试验  

Experimental Study on Iron Separation Process for a Low-grade Iron Ore in Inner Mongolia

作　　者：武丹 张凛 高春庆 WU Dan;ZHANG Lin;GAO Chunqing(Mining Research Institute of Baotou Steel(Group)Corp.;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.)

机构地区：[1]包钢集团矿山研究院(有限责任公司) [2]中钢集团马鞍山矿山研究总院股份有限公司

出　　处：《现代矿业》2024年第3期156-159,共4页Modern Mining

摘　　要：内蒙古某低品位铁矿全铁品位为20.33%、磁性铁品位为13.05%,为开发利用该铁矿石并确定合理的选铁工艺流程,在矿石性质研究的基础上,进行了原矿高压辊磨预选—预选精矿阶段磨矿—单一磁选工艺,高压辊磨预选—预选精矿阶段磨矿—磁选淘洗联合工艺,高压辊磨预选—预选精矿阶段磨矿—磁选浮选联合工艺3种工艺方案的试验研究对比。试验结果表明:3种工艺方案均可获得铁品位65%以上的铁精矿,前2种方案的选矿指标相当,且远优于方案3,而方案2较方案1可明显放粗二段磨矿细度,因此确定采用原矿高压辊磨预选—预选精矿阶段磨矿—磁选淘洗联合工艺作为该矿选铁的最佳工艺,最终获得了铁精矿产率19.07%、全铁品位65.50%、铁回收率61.50%的选别指标。The total iron grade of a low-grade iron ore in Inner Mongolia is 20.33%,and the magnetic iron grade is 13.05%.In order to develop and utilize the iron ore and determine a reasonable iron separation process,based on the study of ore properties,three kinds of process schemes were studied and compared,including pre-selection of raw ore by high pressure roller mill-stage grinding of pre-selection concentrate single magnetic separation process,pre-selection by high pressure roller mill-stage grinding of pre-selec⁃tion concentrate-magnetic separation and elutriation combined process,pre-selection by high pressure roll⁃er mill-stage grinding of pre-selection concentrate-magnetic separation and flotation combined process.The test results show that the iron concentrate with iron grade of more than 65%can be obtained by the three pro⁃cess schemes.The beneficiation indexes of the first two schemes are equivalent and far better than that of Scheme 3,while Scheme 2 can obviously coarsen the second-stage grinding fineness compared with Scheme 1.Therefore,the pre-selection of raw ore by high pressure roller mill-stage grinding of pre-selection concen⁃trate-magnetic separation and elutriation combined process was determined as the best process for iron sepa⁃ration of the mine.Finally,the separation indexes of iron concentrate yield of 19.07%,total iron grade of 65.50%and iron recovery of 61.50%were obtained.

关 键 词：铁矿 高压辊磨 预选抛尾 选矿工艺 

分 类 号：TD951[矿业工程—选矿]