摘要
采用深度还原技术将白云鄂博氧化矿石转化为高金属化率的还原物料,然后再经选矿实现了铁、稀土、铌等元素的有效分离及富集.通过对还原温度、还原时间、配碳比等条件的优化,得到了铁金属化率94.48%的还原矿,经阶段磨矿—粗细分选流程的选别,可获得全铁品位为91.61%,金属化率为93.79%,铁回收率为93.23%的铁粉,该铁粉可作为炼钢的原料;尾矿中稀土品位12.25%,回收率98.73%,可作为分选稀土的原料.
The reduced oxide ore from Bayan Obo with high metallization rate was obtained via a high-efficiency reduction process,then the efficient concentrations of such metal elements as Fe,Nb and RE were implemented.The reduced ore with metallization rate up to 94.48% was obtained by optimizing the operation parameters in tests such as reducing temperature/time and carbon ratio,and,after stepped grinding and grain-size separation,the Fe grade 91.61%,metallization rate 93.79% and Fe recovery rate 93.23% were obtained as the starting material for steel-making.In the tailings the REO is 12.25% with recovery rate 98.73%,i.e.available to be the raw material for RE beneficiation.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第6期886-889,共4页
Journal of Northeastern University(Natural Science)
基金
科技部国际合作重点项目(2006DFB72570)
中央高校基本科研业务费资助项目(N090601004)
关键词
白云鄂博
氧化矿石
深度还原
金属化率
金属铁颗粒
磁选
Bayan Obo
oxide ore
deep reduction
metallization rate
metallic iron grain
magnetic separation
