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金属矿山 ›› 2019, Vol. 48 ›› Issue (02): 145-149.

• 预选工艺应用 • 上一篇    下一篇

鞍千贫赤铁矿石预富集试验

徐冬林1,安亚雄2,3,高鹏2,3,韩跃新2,3   

  1. 1. 鞍钢集团鞍千矿业责任有限公司,辽宁 鞍山 114043;2. 东北大学资源与土木工程学院,辽宁 沈阳 110819;3. 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁 沈阳 110819
  • 出版日期:2019-02-25 发布日期:2019-04-08
  • 基金资助:

    基金项目:“十二五”国家科技支撑计划项目(编号:2015BAB15B02)。

Pre-concentration Experiment of Low-grade Hematite Ore from Anqian Mine

Xu Donglin1, An Yaxiong2,3, Gao Peng2,3, Han Yuexin2,3   

  1. 1. Anqian Mining Co.,Ltd.,Anshan Iron and Steel Group,Anshan 114043,China;2. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819, China;3. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819, China
  • Online:2019-02-25 Published:2019-04-08

摘要: 鞍千贫赤铁矿石铁品位为16.67%,铁主要以赤铁矿的形式存在,铁在赤铁矿中分布率为72.77%,主要脉石矿物为石英。为了开发利用该低品位铁矿石,进行了预富集试验。结果表明:采用湿式强磁预选—磨矿—弱磁选—强磁选工艺预富集,矿石在给料粒度-3 mm、背景磁感应强度为0.8 T、立环转速2.0 r/min、冲次频率200次/min条件下强磁预选,预选精矿在磨矿细度-200目占95%,磁场强度为120 kA/m条件下弱磁选,背景磁感应强度为0.8 T条件下强磁选,可获得TFe品位47.04%、回收率为80.25%的预富集精矿。试验结果可以为我国贫赤铁矿石的强磁预选提供参考。

关键词: 贫赤铁矿石, 强磁预富集, 背景磁感应强度, 转环转速, 冲次频率

Abstract: The iron grade of Anqian lean hematite ore is 16.67%. Iron mainly exists in the form of hematite, which accounts for 72.77% of the total iron. Main gangue mineral is quartz. In order to develop and utilize the iron ore, preconcentration experiment was conducted. Results indicated that, by iron enrich process of wet high-intensity magnetic pre-separation-grinding-low intensity magnetic separation-high intensity magnetic separation. At the feeding particle size -3 mm, background magnetic field intensity is 0.8 T, vertical ring speed 2.0 r/min, stroke frequency 200 times/min; grinding particle size -200 mesh 95%, intensity of low intensity magnetic separation is 120 kA/m, intensity of high intensity magnetic separation is 0.8 T, the preconcentration concentrate with TFe grade of 47.04% and recovery of 80.25% was obtained. The results can provide reference for the high intensity pre-separation of poor hematite ore in China.

Key words: Low-grade hematite ore, High intensity magnetic preconcentration, Background magnetic induction strength, Vertical ring speed, Stroke frequency