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首页> 外文会议>International Conference on Alternative Routes of Iron and Steelmaking ICARISM'99, Sep 15-17, 1997, Perth, WA >Application of Reverse Flotation in Upgrading Western Australian Magnetite Iron Ores
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Application of Reverse Flotation in Upgrading Western Australian Magnetite Iron Ores

机译：反浮选在西澳大利亚磁铁矿升级中的应用

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Upgrading of a Koolanooka magnetite iron ore sample provided by Kingstream Steel Ltd was investigated using low intensity magnetic separation (LIMS) and reverse flotation. The ore contained 38.6 per cent iron, 37.8 per cent silica, 6.5 per cent magnesia and 0.54 per cent alumina, with the main minerals in the ore being amphibole (42 per cent), magnetite (39 per cent) and quartz (14 per cent). The concentrate obtained after low intensity magnetic separation contained 66.6 per cent iron and 6.34 per cent silica with an iron recovery of 72 per cent. This concentrate was further treated by reverse flotation to increase the iron content and reduce the silica content to meet the requirements for direct reduction iron (DRI) feed grade. A series of tests were conducted to determine the response of the magnetic product from LIMS to reverse flotation. The best collector tested was an amine reagent (HOE F1940) supplied by Clariant Australia P/L, which was added at a dosage of 100 g/t together with a depressant (starch) at 150 - 300 g/t. The best pH range tested for the reagents was 8.5 - 9.0. The final concentrate obtained after multi-stage grinding and reverse flotation contained 69.08 per cent iron and 2.89 per cent combined silica and alumina at a total iron recovery of 64.38 per cent. The total iron recovery could be further increased to 70 per cent if the circuit is optimised.
机译：使用低强度磁选（LIMS）和反向浮选法研究了Kingstream Steel Ltd提供的Koolanooka磁铁矿铁矿石样品的提质。该矿石含铁38.6％，二氧化硅37.8％，氧化镁6.5％和氧化铝0.54％，矿石中的主要矿物是角闪石（42％），磁铁矿（39％）和石英（14％）。 ）。在低强度磁分离后获得的精矿含有66.6％的铁和6.34％的二氧化硅，铁的回收率为72％。通过反向浮选法对该精矿进行进一步处理，以增加铁含量并降低二氧化硅含量，以满足对直接还原铁（DRI）进料等级的要求。进行了一系列测试，以确定来自LIMS的磁性产品对反向浮选的响应。测试的最佳捕收剂是由Clariant Australia P / L提供的一种胺试剂（HOE F1940），它以100 g / t的剂量与抑制剂（淀粉）一起以150-300 g / t的剂量加入。试剂测试的最佳pH范围是8.5-9.0。经过多步研磨和反向浮选后获得的最终精矿包含69.08％的铁和2.89％的合并的二氧化硅和氧化铝，铁的总回收率为64.38％。如果对电路进行优化，铁的总回收率可以进一步提高到70％。

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