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金属矿山 ›› 2013, Vol. 42 ›› Issue (12): 147-150.

• 综合利用 • 上一篇    下一篇

江西某铁尾矿磁化焙烧—磁选工艺研究

王威1,2,3,刘红召1,2,3,曹耀华1,2,3,高照国1,2,3   

  1. 1.中国地质科学院郑州矿产综合利用研究所;2.国家非金属矿资源综合利用工程技术研究中心;3.河南省黄金资源综合利用重点实验室
  • 出版日期:2013-12-16 发布日期:2014-02-11
  • 基金资助:

    * 中国地质调查局地质调查工作项目(编号:1212011120299)。

Research of Magnetization Roasting-Magnetic Separation Process for Iron Tailing from Jiangxi Province

Wang Wei1,2,3,Liu Hongzhao1,2,3,Cao Yaohua1,2,3,Gao Zhaoguo1,2,3   

  1. 1.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,China Academy of Geological Sciences;2.National Research Center of Multipurpose Utilization of Non-metallic Mineral Resources;3.Henan Key Laboratory of Gold Resources Utilization
  • Online:2013-12-16 Published:2014-02-11

摘要: 江西某铁尾矿中尚含有38.74%的铁,但98.49%以褐铁矿的形式存在。为了给该尾矿的综合利用提供技术参考,以河南平顶山某无烟煤为还原剂,对其进行了磁化焙烧—磁选工艺研究。结果表明:将该尾矿在煤粉占尾矿+煤粉混合料的质量分数为5%、温度为850 ℃的条件下磁化焙烧60 min,焙烧产物在一段磨矿细度为-0.037 mm占92%、二段磨矿细度为-0.037 mm占97%、粗选场强为192 kA/m、精选场强为170 kA/m条件下经过两段磨矿、1粗2精弱磁选或两段磨矿、1粗3精弱磁选,分别可以获得铁品位为55.75%、铁回收率为78.50%和铁品位为56.24%、铁回收率为74.81%的铁精矿。

关键词: 铁尾矿, 褐铁矿, 磁化焙烧, 弱磁选

Abstract: There are still 38.74% of iron in an iron tailing of Jiangxi, but 98.49% of them exists in form of limonite. In order to provide technical reference for comprehensive utilization of tailings, and taking Henan Pingdingshan anthracite as reductant, the process of magnetization roasting-magnetic separation was studied. The results showed that under conditions of the mass fraction of tailings + pulverized coal 5% at temperature of 850 ℃ for magnetization roasting 60 min, together with first grinding fineness of -0.037 mm 92 %, second grinding fineness of -0.037 mm 97%, field strength 192 kA/m in rough concentration, and field strength 170 kA/m in clean concentration, the roasted products are treated by the low intensity magnetic separation process of two-stage grinding and one-roughing two-cleaning, or the process of two-stage grinding and one-rouging three-cleaning. Then, iron concentrate with Fe grade of 55.75%, 56.24% and Fe recovery of 78.50%, 74.81% was achieved separately.

Key words: Iron tailing, Limonite, Magnetization roasting, Low intensity magnetic separation