东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (4): 556-559.DOI: -

• 材料与冶金 • 上一篇    下一篇

气基预还原处理高铝铁矿石

张作良，李强，李明明，邹宗树   

  1. (东北大学材料与冶金学院，辽宁沈阳110819)
  • 收稿日期:2012-10-15 修回日期:2012-10-15 出版日期:2013-04-15 发布日期:2013-06-19
  • 通讯作者: 张作良
  • 作者简介:张作良(1985-)，男，安徽淮南人，东北大学博士研究生；邹宗树(1958-)，男，山东章丘人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51104037).

Treatment of HighAluminium Content Iron Ore by GasBased Prereduction

ZHANG Zuoliang， LI Qiang， LI Mingming， ZOU Zongshu   

  1. School of Materials ＆ Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2012-10-15 Revised:2012-10-15 Online:2013-04-15 Published:2013-06-19
  • Contact: ZHANG Zuoliang
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摘要： 使用气基预还原的方法对一种全铁质量分数为3082%，Al2O3质量分数为2332%的高铝铁矿石进行铝铁分离研究.研究结果表明:1#球团于900℃、还原气氛为70%CO(体积分数)+30%H2、还原时间为77min时得到最高还原率7713%；2#球团于950℃、还原气氛为70%CO+30%H2、还原时间为80min时得到最高还原率822%；另外，2#球团在900℃以上还原时所能达到的最高还原率很接近；综合考虑，两种球团的最佳预还原温度为900℃；配加消石灰后，可以破坏原矿中铁、铝、硅之间的嵌布关系.X射线衍射分析结果表明，在还原过程中，出现了难还原的Fe2SiO4相和FeAl2O4相，这是导致还原难以进行的原因.

关键词: 高铝铁矿石, 气基预还原, 还原率, 铝铁分离, X射线衍射

Abstract: An approach of gasbased prereduction was introduced to treat a highaluminium content iron ore with total iron of 3082% (mass fraction) and Al2O3 of 2332% for AlFe separation. The results showed that the maximum reduction rate of 1# pellets reached 7713% by reduction for 77 minutes in the reduction atmosphere of 70%CO and 30%H2 in volume fraction at 900℃. The maximum reduction rate of 2# pellets reached 822% by reduction for 80 minutes with 70%CO and 30%H2 in volume fraction at 950℃. The maximum reduction rates achieved for 2# pellets at the temperatures above 900℃ were very close， so the optimal prereduction temperature of two kinds of pellets was 900℃ by taking all the factors into consideration. The additive of slaked lime undermined the existential relationship among ferreous， aluminiferous and silaceous minerals. Xray diffraction results indicated that the phases Fe2SiO4 and FeAl2O4 which were difficult to deoxidize appeared in the process of reduction and made the reduction process difficult to carry on.

Key words: Highaluminum content iron ore, gasbased prereduction, reduction rate, AlFe separation, Xray diffraction

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