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金属矿山 ›› 2015, Vol. 44 ›› Issue (08): 169-172.

• 综合利用 • 上一篇    下一篇

鲁南矿业公司铁尾矿深度还原—磁选提铁试验

鞠会霞1,孙体昌1,赵贵军2   

  1. 1.北京科技大学土木与环境工程学院,北京 100083;2.山东钢铁集团鲁南矿业有限公司,山东 临沂 276421
  • 出版日期:2015-08-15 发布日期:2015-11-19

Iron Recovery by Deep Reduction-magnetic Separation of Tailings from Lunan Mining Company

Ju Huixia1,Sun Tichang1,Zhao Guijun2   

  1. 1.School of Civil and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Lunan Ming Co.,Ltd.,Shandong Iron and Steel Group,Linyi 276421,China
  • Online:2015-08-15 Published:2015-11-19

摘要: 鲁南矿业有限公司铁尾矿铁含量为19.19%,主要杂质成分为SiO2,有害元素硫、磷含量较低。该尾矿中铁主要以硅酸铁和赤褐铁矿形式存在,分布率分别为47.36%和33.10%,采用常规的选矿方法很难得到理想的铁回收指标。为了开发利用该尾矿,采用深度还原—磁选工艺进行选矿试验。结果表明:在试样用量为100 g、还原助剂CaO用量为20 g、还原剂用量为20 g、还原温度为1 100℃、还原时间为40 min、还原产品磨矿细度为-0.043 mm占65%、磁场强度为110 kA /m时可以得到铁品位为91.48%、回收率为86.24%的铁精矿产品。

关键词: 铁尾矿, 还原焙烧, 还原助剂, 磁选

Abstract: The iron grade of iron tailing is 19.19% in Lunan Mining Limited Company.Main impurity composition is SiO2,content of sulphur,phosphorus,etc.harmful element is low.Iron mainly exists in form of iron silicate,hematite-limpnite,with distribution rate of 47.36% and 33.10% respectively.Ideal indexes cannot be obtained by usual mineral processing methods.For the comprehensive development and utilization of the tailings,deep reduction and magnetic separation technology was carried out.It was showed that the optimum conditions are the sample amount is 100 g,assistant reducing agent CaO dosage is 20 g,reduction amount is 20 g,reductant temperature is 1 100℃,reductant time is 40 min,grinding fineness is 65% passing 0.043 mm,and magnetic field intensity is 110 kA/m,iron concentrate with iron grade and recovery of 91.48% and 86.24% was obtained.

Key words: Iron tailings, Reduction roasting, Assistant reduction agent, Magnetic separation