某难选鲕状铁矿石选矿试验  

Experiment on Beneficiation of a Refractory Oolitic Iron Ore

作　　者：邱廷省[1] 张卫星[2,3] 方夕辉[2] 张宝红[2] 杨云[2] 

机构地区：[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　　处：《金属矿山》2013年第3期77-81,共5页Metal Mine

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。A oolitic iron ore mainly exists in form of maghemite with complex disseminated relationship of iron miner- als 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 utiliza- tion 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.

关 键 词：鲕状铁矿石 磁赤铁矿 还原焙烧 反浮选 

分 类 号：TD951.1[矿业工程—选矿]