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金属矿山 ›› 2015, Vol. 44 ›› Issue (05): 77-81.

• 矿物工程 • 上一篇    下一篇

宣龙式鲕状赤铁矿石磁化焙烧—弱磁选试验

刘硕1,张亚辉1,张家1,张艳娇2,张红新2,李洪潮2   

  1. 1.武汉理工大学资源与环境工程学院,湖北 武汉 430070;2.中国地质科学院郑州矿产综合利用研究所,河南 郑州 450006
  • 出版日期:2015-05-15 发布日期:2015-08-04

Research on Magnetizing Roasting-Low Intensity Magnetic Separation of a Xuanlong-Type Oolitic Hematite Ore

Liu Shuo1,Zhang Yahui1,Zhang Jia1,Zhang Yanjiao2,Zhang Hongxin2,Li Hongchao2   

  1. 1.College of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;2.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China
  • Online:2015-05-15 Published:2015-08-04

摘要: 宣龙式鲕状赤铁矿石铁品位较高,达48.65%,主要铁矿物为赤铁矿,占总铁的85.84%,其次是碳酸铁,占总铁的9.50%,磁性铁含量较低,仅占总铁的3.12%;脉石矿物主要为石英,磷、铝等有害元素含量均不高。为探索该资源的高效、低耗开发利用方案,采用磁化焙烧—弱磁选工艺进行了选矿试验研究。结果表明,0.2~0 mm的烟煤与-0.074 mm占62%的试样按质量比12%混合,在800 ℃下焙烧45 min,焙烧产物磨至-0.074 mm占89.2%的情况下进行弱磁选(磁场强度为105.6 kA/m),可得到铁品位为62.50%、铁回收率为85.50%的铁精矿。因此,磁化焙烧—弱磁选工艺适合处理宣龙式鲕状赤铁矿石。

关键词: 鲕状赤铁矿, 磁化焙烧, 弱磁选

Abstract: The iron grade of Xuanlong-type Oolitic hematite ore is up to 48.65%.Main iron mineral is hematite,accounting for 85.84% of the total iron,followed by iron carbonate,representing 9.50%.The content of magnetic iron is low,only 3.12%.Gangue minerals are quartz with trace of harmful elements,phosphorus,aluminum,etc..In order to explore efficient,low-consumption development and utilization of the resources,the process of magnetic roasting-low intensity magnetic separation was selected.The results showed that the mass ratio of sample with 0.2 ~ 0 mm bituminous coal and -0.074 mm accounted for 62% as 12%,roasted at 800 ℃ for 45 min,ground the roasted products to 89.2% -0.074 mm,and through the process of low intensity magnetic separation (magnetic field intensity 105.6 kA/m),iron concentrate with iron grade of 62.50% and recovery of 85.50% was obtained.Therefore,the process of magnetic roasting-low intensity magnetic separation is the suitable process to deal with Xuanlong-type oolitic hematite.

Key words: Oolitic hematite ore, Magnetizing roasting, Low intensity magnetic separation