湖北某难选鲕状赤铁矿还原焙烧—磁选试验  

Experiment of Reducing Roasting-magnetic Separation to a Refractory Oolitic Hematite in Hubei Province

作　　者：刘若华[1] 孙伟[1] 李珊梅[1] 徐龙华[1] 

机构地区：[1]中南大学资源加工与生物工程学院

出　　处：《金属矿山》2011年第9期116-119,共4页Metal Mine

基　　金：中南大学前沿研究计划项目(编号:2010QZZD002)

摘　　要：简介了湖北某难选鲕状赤铁矿的工艺矿物学特征,对该矿石还原焙烧的合适温度、还原剂用量、焙烧时间以及磁选的合适场强进行了试验研究。研究表明,铁品位为47.57%的鲕状赤铁矿在焙烧温度为850℃、碳粉用量为25%、焙烧时间为60 min、冷淬后磨矿细度为-0.074 mm占85%、磁选场强为127.39 kA/m情况下,能获得铁品位为56.75%、回收率为79.96%的铁精矿产品。Briefly introduce the technological mineralogy of a refractory oolitic hematite in Hubei province.The experiment was reasearched on the ore of roasting temperature,dosage of reducing agent,roasting time and magnetic intensity.The result showed when the oolitic hematite of 47.57% iron grade was separated by reducing roasting with the roasting temperature of 850 ℃,dosage of 25% powdered carbon,roasting time of 60 min,grinding size of 65%-0.074 mm after quenching and magnetic intensity of 127.39 kA/m,the grade and recovery of iron concentration could reach to 56.75% and 79.96%,respectively.

关 键 词：鲕状赤铁矿 磁化焙烧 磁选 

分 类 号：TD951.1[矿业工程—选矿]