欢迎访问《金属矿山》杂志官方网站,今天是 分享到:
×

扫码分享

金属矿山 ›› 2012, Vol. 41 ›› Issue (02): 60-62+66.

• 矿物工程 • 上一篇    下一篇

某微细嵌布贫赤铁矿石直接还原—弱磁选试验

朱德庆,邓秀兰,春铁军,潘建,肖永忠,阮志勇   

  1. 中南大学资源加工与生物工程学院
  • 出版日期:2012-02-15 发布日期:2012-05-30
  • 基金资助:

    * 湖南省国土资源厅矿产资源保护项目(编号:2007K02),中南大学研究生学位论文创新基金项目(编号:1343-74335000021)。

Research of Superfine Low Grade Hematite by Coal-based Direct -Reduction-low Intensity Magnetic Separation

Zhu Deqing,Deng Xiulan,Chun Tiejun,Pan Jian,Xiao Yongzhong,Ruan Zhiyong   

  1. School of Minerals Processing and Bioengineering,Central South University
  • Online:2012-02-15 Published:2012-05-30

摘要: 湖南某赤铁矿石铁品位约27%,大部分铁矿物嵌布粒度在5 μm左右。对该矿石进行煤基直接还原—弱磁选试验研究,主要考察了还原温度、还原时间对还原效果的影响以及磨矿细度、磁场强度对弱磁选效果的影响。试验结果表明:将原矿压团后与烟煤(煤与矿的质量比为2∶1)在1 150 ℃下还原焙烧100 min,所得还原矿的金属化率为93.41%;还原矿磨至-0.043 mm占90.22%后在63.68 kA/m的磁场强度下经1次弱磁选,可获得铁品位为75.71%、金属化率为92.11%、铁回收率为91.12%的铁精矿。  

关键词: 微细嵌布贫赤铁矿, 煤基直接还原, 弱磁选

Abstract: A hematite assay 27.2%Fe and most iron minerals occurr at 5 μm. Effects of various factors inducling reduction temperature,reduction time and grinding fineness on direct reduction-low intensity magnetic separation were discussed. The results show that iron ore concentrate assaying 75.71% Fe, metallization degree at 92.11% and iron recovery at 91.12% are obtained under the following conditions: the briquettes are reduced at 1 150 ℃ for 100 min (mass ratio of soft coal to briquettes is 2) and the reduced briquettes are separated at the grinding fineness of 90.22% less than 0.043 mm and field strength of 63.68 kA/m.

Key words: Superfine low grade hematite, Coal based direct reduction, Low intensity magnetic separation