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首页> 外文期刊>Transactions of the Institutions of Mining and Metallurgy, Section C. Mineral Processing and Extractive Metallurgy >Experimental study on the beneficiation of low-grade iron ore fines using hydrocyclone desliming, reduction roasting and magnetic separation
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Experimental study on the beneficiation of low-grade iron ore fines using hydrocyclone desliming, reduction roasting and magnetic separation

机译：水力旋流器除泥，还原焙烧和磁选对低品位铁矿选矿的试验研究

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摘要

Beneficiation of -2 mm low-grade iron ore tailings (50.7%Fe, 10.8%SiO_2 and 4.4%AI_2O_3) from Western Australia was studied. The sample consisted of hydrohaematite, goethite and guartz, with lesser kaolinite and shale. Two processing options were tested, which were wet high-intensity magnetic separation (WHIMS), either using deslimed or untreated feed, and reduction (magnetising) roasting of deslimed feed followed by Davis tube tests (DTT). WHIMS tests using deslimed feed gave a product having 55.4%Fe, 6.1%SiO_2 and 2.7%Al_2O_3, while the iron recovery was 55-7%. The calcined iron grade was 62.1 %Fe. Davis tube tests using deslimed feed that had been reduction roasted at 700°C using a 1 :1 mixture of CO/CO_2 gave a product with 63.2%Fe, 5.4%SiO_2 and 2.9%Al_2O_3, while the iron recovery was 60.1%. Overall, desliming followed by reduction roasting and DTT produced the highest grade product with the highest iron recovery.
机译：研究了来自西澳大利亚州的-2 mm低品位铁矿石尾矿（50.7％Fe，10.8％SiO_2和4.4％Al_2O_3）的选矿。样品由水赤铁矿，针铁矿和guartz组成，少量的高岭石和页岩组成。测试了两个处理选项，分别是使用脱泥或未经处理的进料进行湿式高强度磁选（WHIMS），以及将脱泥的进料进行还原（磁化）焙烧，然后进行戴维斯管测试（DTT）。使用脱泥进料的WHIMS测试得到的产品具有55.4％的Fe，6.1％的SiO_2和2.7％的Al_2O_3，而铁的回收率为55-7％。煅烧铁的品位为62.1％Fe。使用经脱泥的进料的戴维斯管测试，该进料已在700°C下使用CO / CO_2的1：1混合物进行还原焙烧，得到的产品含63.2％的Fe，5.4％的SiO_2和2.9％的Al_2O_3，而铁的回收率为60.1％。总体而言，脱泥后进行还原焙烧和DTT生产出了具有最高铁回收率的最高品位产品。

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