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金属矿山 ›› 2015, Vol. 44 ›› Issue (06): 70-73.

• 矿物工程 • 上一篇    下一篇

辽宁某1 400 m深部铁矿石选别工艺研究

张小龙1,刘杰1,韩跃新1,李艳军1,张淑敏1,王越2   

  1. 1.东北大学资源与土木工程学院,辽宁 沈阳 110819;2.中国地质科学院矿产综合利用研究所,四川 成都 610000
  • 出版日期:2015-06-15 发布日期:2015-08-05
  • 基金资助:

    * 国家自然科学基金青年基金项目(编号:51204035),中国地质调查项目(编号:12120113086600)。

Research on Beneficiation of a Deep Iron Ore at 1 400 m in Liaoning

Zhang Xiaolong1,Liu Jie1,Han Yuexin1,Li Yanjun1,Zhang Shumin1,Wang Yue2   

  1. 1.College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;2.Institute of Multipurpose Utilization of Mineral Resource,Chinese Academy of Geological Science,Chengdu 610000,China
  • Online:2015-06-15 Published:2015-08-05

摘要: 辽宁某开采深度为1 400 m的深部铁矿石铁品位为37.03%,铁主要以磁性铁及赤褐铁矿的形式存在,分布率分别为72.83%、22.52%,硫、磷等有害元素含量很低。为开发利用该矿石,对其进行了弱磁选—强磁选—混磁精矿反浮选工艺研究。结果表明:矿样磨细至-0.043 mm占75%后,经1段弱磁选—2段强磁选,可得到铁品位47.50%、回收率95.01%的混磁精矿;混磁精矿再磨至-0.038 mm占95%后,以淀粉为抑制剂、RS-3为捕收剂、经1粗1精2扫阳离子反浮选流程处理,可获得铁品位67.21%、回收率85.03%的精矿产品。采用磁选—反浮选流程处理该深部铁矿石获得了较为理想的选别指标,对类似复杂难选深部铁矿石选矿具有借鉴意义。

关键词: 深部铁矿石, 阶段磨选, 混磁精矿, 反浮选

Abstract: There is 37.03% Fe in a deep iron ore with depth of 1 400 m in Liaoning. Iron mainly exists in form of magnetite and hematite-limonite,with distribution rate of 72.83% and 22.52% respectively.The content of harmful elements such as sulfur,phosphorus is very low.Beneficiation experiments of low intensity magnetic separation(LIMS)-high intensity magnetic separation(HIMS)-reverse flotation on mixed magnetic iron concentrate were applied for exploitation and utilization of the ore.The results indicated that,at the grinding fineness of 75% passing 0.043 mm,via once LIMS and twice HIMS,mixed magnetic concentrate with iron grade of 47.05% and recovery of 95.01% is obtained.Iron concentrate with iron grade of 67.21% and recovery of 85.03% is obtained after ground the mixed magnetic concentrate to 95% passing 0.038 mm and then endure one roughing-one cleaning-two scavenging flotation process,using starch as depressor and RS-3 as collector.By magnetic and reverse flotation separation technology to deal with the deep iron ore can achieve relative ideal separation indexes,and can provide significant reference for the separation of similar refractory deep iron ore.

Key words: Deep iron ore, Stage grinding stage separation, Mixed magnetic concentrate, Reverse flotation