超微细贫赤铁矿直接还原—磁选试验研究

金属矿山 ›› 2008, Vol. 38 ›› Issue (04): 47-49+98.

超微细贫赤铁矿直接还原—磁选试验研究

肖永忠^1,2，翟勇¹，朱德庆¹，潘建¹，崔瑜¹，徐栋梁¹

1.中南大学；2.湖南华菱涟源钢铁公司

收稿日期:2007-02-20 出版日期:2008-04-15 发布日期:2011-07-20

Test Research on Direct Reduction-Magnetic Separation of Super-Fine Lean Hematite Ore

Xiao Yongzhong^1,2，Zhai Yong¹，Zhu Deqing¹，Pan Jian¹，Cui Yu¹，Xu Dongliang¹

1.South Central University；2.Hunan Hualing Lianyuan Iron & Steel Co.

Received:2007-02-20 Online:2008-04-15 Published:2011-07-20

摘要/Abstract

摘要： 湖南某赤铁矿石属铁质板岩，铁品位低，主要铁矿物赤铁矿粒度大部分仅3~5 μm，且赤铁矿与石英嵌布关系复杂，采用常规选矿工艺不能有效分选。为此，采用煤基直接还原—磁选工艺处理该矿石，实现了铁的有效富集：原矿在还原温度为950 ℃、还原时间为80 min、煤/矿质量比为2.5∶1的条件下通过煤基直接还原转化为金属化率为93.82%的还原矿；还原矿经3段磨矿、3段磁选，可获得铁品位为69.54%、铁回收率为65.58%（对还原矿）、金属化率高达98.02%的铁精矿。

关键词: 超微细贫赤铁矿, 煤基直接还原, 磁选

Abstract: A Hunan hematite ore belongs to ferruginous slat and is of low grade.Its main iron mineral is hematite, which mostly occurs in about 3~5 μm size, has a complex association with quartz and can not be effectively separated by conventional processing method.Therefore, the process of coal-based direct reduction-magnetic separation was adopted for this ore.As a result, an effective iron enrichment was realized and a reduced ore obtained at a metallization rate of 93.82% by coal-based direct reduction at a reduction temperature of 950 ℃, time of 80 min and coal/ore mass ratio of 2.5∶1.The reduced ore then went through three stage grinding and three stage magnetic separation.An iron concentrate was produced, with the metallization rate bring as high as 98.02% , iron grade being 69.54%and iron recovery being 65.58% (to the run-of-mine ore).

Key words: Super-fine lean hematite ore, Coal-based direct reduction, Magnetic

肖永忠, 翟勇, 朱德庆, 潘建, 崔瑜, 徐栋梁. 超微细贫赤铁矿直接还原—磁选试验研究[J]. 金属矿山, 2008, 38(04): 47-49+98.

XIAO Yong-Zhong, DI Yong, ZHU De-Qing, PAN Jian, CUI Yu, XU Dong-Liang. Test Research on Direct Reduction-Magnetic Separation of Super-Fine Lean Hematite Ore[J]. Metal Mine, 2008, 38(04): 47-49+98.

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