某铁矿石悬浮磁化焙烧—磁选实验研究 |
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引用本文: | 孔德翠,刘杰,张淑敏,李艳军.某铁矿石悬浮磁化焙烧—磁选实验研究[J].矿产综合利用,2022,43(5):131. |
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作者姓名: | 孔德翠 刘杰 张淑敏 李艳军 |
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作者单位: | 东北大学资源与土木工程学院,难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁 沈阳 110819 |
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摘 要: | 某铁矿石铁品位是56.36%,主要以赤褐铁矿的形式存在,脉石矿物主要是石英和铝土矿。对该铁矿石采用了悬浮磁化焙烧—磁选工艺实验研究,在给料粒度为-0.074 mm 56.11%,焙烧温度为560℃,总气量为500 mL/min、CO浓度为30%,还原时间为15 min的条件下进行焙烧实验,然后将焙烧产品磨至-0.074 mm 95%,在磁场强度90 kA/m,选别时间5 min的条件下进行弱磁选实验,获得了铁品位64.42%,铁回收率94.49%的高品位铁精矿,为处理难选铁矿石提供了解决办法。
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关 键 词: | 铁矿 悬浮磁化焙烧 磁选 赤铁矿 磁铁矿 |
收稿时间: | 2020-09-07 |
Experimental Study on Suspension Magnetization Roasting-Magnetic Separation of an Iron Ore |
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Affiliation: | School of Resources and Civil Engineering, Northeastern University, National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology, Shenyang, Liaoning, China |
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Abstract: | The iron grade of a certain iron ore was 56.36%. The iron of raw ore mainly existed in the forms of hematite and limonite. The gangue minerals were chiefly quartz and bauxite. Therefore, a suspensionmagnetization roasting-magnetic separation process test was conducted on the ore. The results indicated that the optimum conditions for reducing roasting are as follows: The size of feed is -0.074 mm 56.11%, with roasting temperature 560℃, concentration of CO 30%, and roasting time 15 min. Under the optimum roasting conditions, the roasted products were ground to -0.074 mm 95%, and then magnetic separation was carried out to produce aniron concentrate with iron grade of 64.42% and iron recovery of 94.49%. It also provides a solution for other refractory iron ores. |
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