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金属矿山 ›› 2014, Vol. 43 ›› Issue (03): 71-74.

• 矿物工程 • 上一篇    下一篇

镜铁山5~15 mm粒级镜铁矿石磁化焙烧—弱磁选试验

丁春江1,陈铁军1,2,胡佩伟1,2,黄献宝1,马浩1   

  1. 1.武汉科技大学资源与环境工程学院,湖北 武汉 430081;2.冶金矿产资源高效利用与造块湖北省重点实验室,湖北 武汉 430081
  • 出版日期:2014-03-15 发布日期:2014-04-28

Magnetic Roasting and Low Intensity Magnetic Separation Experiment of Specularite Particles at 5~15 mm from Jingtie Mountain

Ding Chunjiang1,Chen Tiejun1,2,Hu Peiwei1,2,Huang Xianbao1,Ma Hao1   

  1. 1.College of Resource and Environment Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,China
  • Online:2014-03-15 Published:2014-04-28

摘要: 甘肃镜铁山矿采用竖炉磁化焙烧—弱磁选—反浮选工艺处理100~15 mm的镜铁矿石,可获得铁品位58.5%左右、铁回收率78%左右的铁精矿;对15~0 mm的粉矿采用磨矿—强磁选工艺处理,仅能获得铁品位为47.5%左右、铁回收率为60%左右的铁精矿。为了提高粉矿分选指标,改善烧结料的品质,对粉矿中的15~5 mm粒级进行了磁化焙烧—弱磁选试验。结果表明,在煤粉与试样的质量比为2%,煤粉粒度为1~0 mm,焙烧温度为810 ℃,焙烧时间为60 min,焙烧产物磨矿细度为-0.074 mm占80%,弱磁选磁场强度为91.56 kA/m条件下,可获得铁品位为55.80%、铁回收率为83.97%的铁精矿。

关键词: 镜铁矿, 磁化焙烧, 弱磁选

Abstract: The iron concentrate with iron grade of 58.5%,iron recovery of 78% can be obtained by dealing with specularite particles at 100~15 mm from Jingtie Mountain,Gansu province through the process of furnace magnetic roasting-low intensity magnetic separation-reverse flotation.Iron concentrate with iron grade of only 47.5%,iron recovery of 60% was obtained by dealing with specularite particles at 15~0 mm through the process of grinding-high intensity magnetic separation.In order to improve the beneficiation indexes,the magnetic roasting-magnetic separation experiments on particles at 15~5 mm was conducted.The results showed that iron concentrate with iron grade of 55.80% and iron recovery of 83.97% was obtained at conditions of mass ratio of coal to ore samples at 2%,particle size of coal at 1~0 mm,roasting temperature of 810 ℃,roasting time for 60 min,grinding fineness of roasted products at 80% passing -0.074 mm,and low magnetic field intensity of 91.56 kA/m.

Key words: Specularite, Magnetic roasting, Low intensity magnetic separation