鞍山式贫赤铁矿尾矿预先分级-再选试验研究  

Experimental Study on Pre-classification and Reconcentration of Anshan Type Lean Hematite Tailings

作　　者：马艺闻 张伦旭 刘杰[2] 金丹 李洋 MA Yiwen;ZHANG Lunxu;LIU Jie;JIN Dan;LI Yang(School of Mining Engineering,University of Science and Technology Liaoning,Anahan 114051,China;School of of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]东北大学资源与土木工程学院,辽宁沈阳110819 [3]东北大学冶金学院,辽宁沈阳110819

出　　处：《金属矿山》2024年第11期88-93,共6页Metal Mine

基　　金：辽宁科技大学研究生科技创新项目(编号:LKDYC202226)。

摘　　要：为提高鞍山某铁尾矿的综合利用率,在工艺矿物学研究基础上进行了选矿试验研究。结果表明,铁尾矿试样中的主要成分SiO_(2)含量为79.77%,TFe品位为9.05%,有害成分S、P含量极低;试样中的主要铁矿物赤铁矿含量为9.47%,次要铁矿物为磁铁矿、褐铁矿,主要脉石矿物石英含量高达73.02%,其他脉石矿物少量;试样中的铁主要以赤褐铁的形式存在,分布率高达72.55%,磁性铁分布率仅为14.72%;试样粒度较粗,-0.074 mm产率仅44.68%,铁在细粒级有明显的富集现象。试样经脱粗(+0.074 mm)—1粗1精磁选—1粗2精2扫、中矿顺序返回流程反浮选,获得了TFe品位为60.56%、回收率为41.76%的再选铁精矿,产率为55.48%的+0.074 mm高硅粗砂,TFe品位为7.33%、回收率为31.02%的磁浮选综合尾矿产率仅38.28%,达到了较好的选铁、提粗砂、尾矿减量化的高效综合利用目标。In order to improve the comprehensive utilization rate of an iron tailings in Anshan,the beneficiation test was carried out on the basis of process mineralogy research.The results showed that the content of SiO_(2)in the iron tailings sample is 79.77%,the grade of TFe is 9.05%,and the content of deleterious components S and P is notably low.The main iron mineral hematite content in the sample is 9.47%,the secondary iron minerals are magnetite and limonite.The main gangue mineral quartz content is as high as 73.02%,and other gangue minerals are present in minor quantities.The iron in the sample mainly exists in the form of hematite-brown iron,and the distribution rate is as high as 72.55%,while the distribution rate of magnetic iron is only 14.72%.The particle size of the sample is coarse,the yield of-0.074 mm is only 44.68%,and the iron is obviously enriched in the fine particle size.The sample was subjected to de-coarsening(+0.074 mm),one roughing one cleaning magnetic separation and one roughing two cleaning two scavenging,and the middle ore was returned to the reverse flotation process in order to obtain a reselected iron concentrate with a TFe grade of 60.56%and a recovery rate of 41.76%.The+0.074 mm high-silicon coarse sand with a yield of 55.48%,and the comprehensive tailings rate of magnetic flotation with a TFe grade of 7.33%and a recovery rate of 31.02%was only 38.28%,which achieved a better comprehensive utilization goal of iron separation,coarse sand extraction,and tailings reduction.

关 键 词：贫赤铁矿尾矿 分级-再选 磁-浮联合分选 

分 类 号：TD923.14[矿业工程—选矿]