安徽某铁矿新矿体矿石入选试验研究  

Experimental Study on Ore Selection of a New Ore Body in an Iron Mine of Anhui

作　　者：王宁 武利朔 WANG Ning;WU Lishuo(Anhui Development Mining Co.,Ltd.)

机构地区：[1]安徽开发矿业有限公司,安徽省六安市237474

出　　处：《现代矿业》2024年第2期10-12,16,共4页Modern Mining

摘　　要：安徽某镜铁矿选矿厂将入选部分以磁铁矿为主的新开采矿体矿石,与原单一镜铁矿石相比,新矿体黄铁矿含量显著较高,且出现大量的原镜铁矿石中没有的闪石、绿泥石,但石英、长石含量显著较低。为了解新矿石入选对原生产系统的影响,进行了混合矿(原镜铁矿石与新矿体矿石按质量比5∶1配矿)与原镜铁矿对比选矿试验。结果表明,在一段磨矿细度为-200目45%的情况下,采用1次弱磁选2次强磁选、强磁选1精矿一次重选获取精矿、弱磁选精矿与强磁选2精矿及重选尾矿后并再磨至过200目筛、筛上二次重选再提精、二次重选尾矿返回再磨、二段全部筛下再1次弱磁选2次强磁选、磁选混合精矿1粗1精3扫常规闭路反浮选,TFe品位31.10%的混合样分选精矿TFe品位66.32%、TFe回收率78.67%,TFe品位30.42%的原镜铁矿样(对比样)分选精矿TFe品位66.45%、TFe回收率85.26%,表明新矿体矿石的可选性显著下降。A specularite concentrator in Anhui will select some newly mined ore bodies dominated by magnetite.Compared with the original single specularite ore,the content of pyrite in the new ore body is sig-nificantly higher,and a large number of original specularite ore do not have amphibole and chlorite,but the content of quartz and feldspar is significantly lower.In order to understand the influence of new ore selection on the original production system,a comparative beneficiation test of mixed ore(original specularite ore and new ore blending at a mass ratio of 5∶1)and original specularite ore was carried out.The results show that under the condition of grinding fineness of-200 mesh 45%,one low intensity magnetic separation and two high intensity magnetic separation,high intensity magnetic separation 1 concentrate one gravity separation to obtain concentrate,low intensity magnetic separation concentrate and high intensity magnetic separation 2 concentrate and gravity separation tailings merger regrinding through 200 mesh sieve,plus sieve two gravi-ty separation and extracting concentrate once again,two gravity separation tailings return to regrinding,two stage all minus mesh minerals one low intensity magnetic separation and two high intensity magnetic separa-tion again,magnetic separation mixed concentrate one roughing one cleaning and three scavenging conven-tional closed-circuit reverse flotation process is adopted.The TFe grade of the separation concentrate of the mixed sample with TFe grade of 31.10%is 66.32%,and the TFe recovery rate is 78.67%.The TFe grade of the separation concentrate of the original specularite sample(contrast sample)with TFe grade of 30.42%is 66.45%,and the TFe recovery rate is 85.26%,indicating that the selectivity of the new ore body ore is sig-nificantly reduced.

关 键 词：镜铁矿 磁铁矿 混合矿 

分 类 号：TD951[矿业工程—选矿]