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首页> 外文会议>International conference on alternative routes of iron and steelmaking >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：反向浮选在升级西澳大利亚磁铁矿铁矿石中的应用

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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：使用低强度磁分离（LIMS）和反向浮选进行了Kingstream Steel Ltd提供的Koolanooka磁铁矿铁矿石样品。矿石含有38.6％的铁，37.8％的二氧化硅，6.5％氧化镁和0.54％的氧化铝，矿石的主要矿物是倒角（42％），磁铁矿（39％）和石英（14％）（14％） ）。低强度磁性分离后获得的浓缩物含有66.6％的铁和6.34％的二氧化硅，铁回收率为72％。通过反向浮选进一步处理这种浓缩物，以增加铁含量并减少二氧化硅含量以满足直接减少铁（DRI）进料等级的要求。进行了一系列测试以确定磁性产品从LIM逆转浮选的响应。测试的最佳收集器是由Clariant Australia P / L提供的胺试剂（锄头F1940），其用10g / t的剂量与150-300g / t的抑制剂（淀粉）一起加入。测试的最佳pH范围为试剂为8.5-9.0。在多级研磨和反向浮选后获得的最终浓缩物含有69.08％的铁和2.89％的二氧化硅和氧化铝，总铁回收率为64.38％。如果电路进行了优化，则总铁恢复可能进一步增加到70％。

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