四川某铁矿铁精矿制备超级铁精矿实验

Super-Grade Iron Concentrate Experimental Study on an Iron Concentrate from Sichuan

对四川某铁矿铁精矿进行超级铁精矿选别实验研究,原料中TFe品位65.50%,主要的脉石成分为SiO_(2),品位为4.82%,有害元素S、P含量较低,磁性铁占有率98.74%,其他物相的铁元素含量很低,且基本不具有磁性,通过继续磨矿-磁选,可提升磁性铁占有率,进而提升铁精矿纯度。实验采用“预先筛分-磨矿分级-磁选-反浮选”的选别工艺制备超级铁精矿,在筛分尺寸0.074 mm,以纳米陶瓷球为磨矿介质,磨矿粒度−0.038 mm 90%,反浮选阳离子捕收剂分段添加量(100+50+50)g/t,玉米淀粉600 g/t的条件下可获得产率24.23%,可获得铁品位71.71%,SiO_(2)含量0.16%,酸不溶物0.16%的超级铁精矿。该工艺磨矿能耗低,药剂制度简单,药剂绿色高效,流程合理,可行性高,同时全流程实验生产的副产品铁精矿产率72.25%,品位65.47%,可作为优质铁精矿销售。

In terms of the iron concentrate,the TFe grade is 65.50%and mainly gangue is quartz with the content of 4.82%.Additionally,the content of harmful impurity,sulphur and phosphor,is low.Following grinding-magnetic separationis able to enhance the mFe content and grade of concentrate for the reason that the content of mFe is 98.74%and other iron phase is nonmagnetic.The process of prescreening-grinding-classification-magnetic separation-reverse flotation is adopted to the super-grade iron concentrate experimental study of an iron concentrate from Sichuan.When the screen size is 0.074 mm and grinding fitness is-0.038 mm 90%,using the thenanoceramic balls as milling medium,super-grade iron concentrate with yield 24.23%,TFe grade 71.71%,quartz content of 0.16%,acid insoluble content of 0.16%could be obtained.In the process,the usage of corn starch is 600 g/t and the usage of collector is 100+50+50 g/t.The process is reasonable and significantly feasibility with low energy consumption and simple reagent system.Additionally,the process could obtain normal iron concentrate with the yield of 72.25%and TFe grade of 65.47%which could be considered as good iron concentrate product to sell.