微细磁铁矿选矿尾矿中回收赤铁矿的工艺研究 |
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引用本文: | 陈志友,冯其明,石晴.微细磁铁矿选矿尾矿中回收赤铁矿的工艺研究[J].矿冶工程,2016(5):60-63. |
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作者姓名: | 陈志友 冯其明 石晴 |
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作者单位: | 中南大学 资源加工与生物工程学院,湖南 长沙,410083 |
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摘 要: | 采用高梯度磁选和离心机重选回收磁铁矿选矿尾矿中的赤铁矿。结果表明,当磁场强度为800 k A/m、磁介质为Φ2 mm棒介质、脉动冲次为200 r/min时,一次磁选精矿品位为31.2%,精矿回收率为84.44%;将一次磁选精矿细磨至-0.045 mm粒级占90%,采用高梯度磁选-离心机重选工艺,当离心机转鼓转速为400 r/min、补加水量为2 000 L/min时,最终铁精矿品位为60.07%,回收率为43.89%。
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关 键 词: | 磁铁矿选矿尾矿 磁选 重选 铁精矿 磁铁矿 赤铁矿 |
Reclaiming Hematite from Magnetic Separation Tailings of Fine Magnetite Ore |
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Abstract: | High gradient magnetic separation ( HGMS ) and centrifuge gravity separation ( CGS ) were introduced to recover hematite from magnetite tailings. The results show that, using rod?shaped magnetic media of 2 mm in diameter, a primary magnetic separation concentrate with iron grade and recovery respectively as 31.2% and 84.44% was obtained under a magnetic field strength of 800 kA/m and a pulsating frequency of 200 r/min. Then, the rough concentrate was reground to a fineness of -0. 045 mm 90% and treated with HGMS?CGS with rotational speed for centrifugal drum at 400 r/min and replenishing water quantity at 2 000 L/min, resulting in a final iron concentrate with 60.07% Fe grade at 43.89% recovery. |
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Keywords: | tailings from magnetite processing magnetic separation gravity separation iron concentrate magnetite hematite |
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