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金属矿山 ›› 2013, Vol. 42 ›› Issue (03): 77-81.

• 矿物工程 • 上一篇    下一篇

某难选鲕状铁矿石选矿试验

邱廷省1,张卫星2,3,方夕辉2,张宝红2,杨云2   

  1. 1.江西理工大学;2.江西理工大学资源与环境工程学院;3.长沙有色冶金设计研究院有限公司
  • 出版日期:2013-03-15 发布日期:2013-04-16

Experiment on Beneficiation of a Refractory Oolitic Iron Ore

Qiu Tingsheng1,Zhang Weixing2,3,Fang Xihui2,Zhang Baohong2,Yang Yun2   

  1. 1.Jiangxi University of Science and Technology;2.Faculty of Resource and Environmental Engineering,JiangxiUniversity of Science and Technology;3. Changsha Engineering & Research Institute Co., Ltd. of Nonferrous Metallurgy
  • Online:2013-03-15 Published:2013-04-16

摘要: 某鲕状铁矿石以磁赤铁矿为主,铁矿物与脉石矿物嵌布关系极复杂,且含一定量易泥化的赤铁矿和含铁黏土,常规磁选工艺难以显著提高精矿铁品位。采用还原焙烧—阶段磨矿阶段弱磁选—反浮选工艺对该矿石进行了开发利用研究。结果表明,矿石经还原焙烧—两段阶段磨矿阶段弱磁选—1粗1精2扫、中矿顺序返回反浮选流程处理,最终获得了铁品位为61.30%、铁回收率为80.43%的铁精矿。

关键词: 鲕状铁矿石, 磁赤铁矿, 还原焙烧, 反浮选

Abstract: A oolitic iron ore mainly exists in form of maghemite with complex disseminated relationship of iron minerals and gangue minerals and containing a certain amount of mudding hematite and iron clay. It is difficult to significantly improve iron grade by the conventional magnetic separation process. In the tests, the process of reduction roasting-stage grinding and stage low intensity magnetic separation-reverse flotation is investigated to realize the development and utilization of the ore. The results show that iron concentrate with Fe grade of 61.30% and iron recovery of 80.43% was obtained by the process of reduction roasting- two-stage grinding and stage low intensity magnetic separation- one roughing, one cleaning and two scavenging-inverse flotation-middles back to the flow-sheet in turn.

Key words: Oolitic iron ore, Maghemite, Reduction roasting, Reverse flotation