太和铁矿一段铁精矿磁筛精选试验研究  

Experimental Research on the Magnetic Screening for Crude Concentrate at Taihe Iron Mine

作　　者：付冠文[1,2] 岳铁兵[1] 王建业[1] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所 [2]重庆钢铁集团矿业有限公司

出　　处：《金属矿山》2010年第8期59-62,共4页Metal Mine

摘　　要：太和铁矿矿石为钒钛磁铁矿,现场选铁采用两段阶段磨矿、阶段磁选工艺流程,二段再磨量大,成本高,且最终精矿铁品位仅能基本满足大于55%的质量要求。在实验室模拟现场流程制备出一段精矿,采用磁筛对其进行再磨后和再磨前的精选试验,考察利用磁筛提高最终精矿铁品位或减少二段再磨量的可能性。结果表明：再磨后的一段精矿经磁筛精选,最终精矿铁品位未能提高;一段精矿再磨前直接经磁筛精选,可预先获得一部分铁品位为56%以上的合格精矿,从而减少约60%的再磨量。Taihe iron ore belongs to the vanadium-titanium magnetite.Now the process of two-stage grinding and stage magnetic separation is adopted on-site.But the large amount of the secondary grinding resulted in high costs.Moreover,the final concentrate grade can only meet the basic requirements of iron grading at 55% or more.In the laboratory,the crude concentrates are prepared by simulating the field flow-sheet.By using the magnetic screen,the re-concentration tests before and after re-grinding are made to investigate if possible to improve the final concentrate iron grade or reduce the amount of the secondary grinding.The results showed that： the final concentrate did not be improved after crude concentrate was screened by magnetic screening;And if the crude concentrate is directly separated by the magnetic screening before regrinding,a part of iron concentrate grading at 56% or more can be obtained in advance so as to reduce the amount of re-grinding of about 60%.

关 键 词：钒钛磁铁矿 磁筛 精选 精矿铁品位 再磨矿量 

分 类 号：TD951.1[矿业工程—选矿]