某复杂难选赤褐铁矿磁化焙烧分选试验研究  

Experiment Study on Magnetic Roasting-Separation of Refractory Hematite Limonite

作　　者：房启家 Fang Qijia(Shandong Iron and Steel Group Mining Co.,Ltd.)

机构地区：[1]山东钢铁集团矿业有限公司,山东省济南市250000

出　　处：《现代矿业》2020年第4期106-109,共4页Modern Mining

摘　　要：某复杂难选铁矿石铁含量为55.88%,铁主要以赤铁矿、褐铁矿形式存在,脉石矿物主要是石英和三水铝石.为探究磁化焙烧—磁选工艺处理该矿石的可行性,进行了选矿试验研究.结果表明,在原料直接烘干、打散(-0.074 mm含量53.41%)、焙烧温度为540℃,CO浓度为40%,焙烧时间为25 min条件下进行焙烧,焙烧产品磨细至-0.1 mm,在磁场强度为56.7 kA/m条件下弱磁选,可获得铁品位63.56%、铁回收率97.18%铁精矿.磁化焙烧技术为这种复杂难选赤褐铁矿的开发利用提供了依据.There is 55.88%Fe in a refractory iron ore.Valuable iron minerals mainly exist in the form of hematite and limonite,and gangue minerals are quartz and gibbsite.An innovative technological process consisting of magnetic roasting and magnetic separation was applied to verify the feasibility for treating the ore.The experiment results showed iron concentrate with Fe grade of 63.56%and Fe recovery of 97.18%was obtained under the conditions of raw ore directly drying and scattered(-0.074 mm accounted for 53.41%),reduction temperature 540℃,concentration of carbon monoxide 40%roasted for 25 min,the roasted product ground to-0.1 mm with magnetic field intensity of 56.7 kA/m.This technological process provide basis for the efficient utilization of refractory hematite limonite.

关 键 词：赤铁矿 磁化焙烧 磁选 物相分析 

分 类 号：TD951[矿业工程—选矿] TD924