盐酸浸出白云鄂博选铁尾矿中经钙化焙烧的稀土  

After Calcium Roasting Rare Earths of Bayan Obo Iron Tailings Leaching by Hydrochloric Acid

作　　者：郑强[1] 边雪[1] 吴文远[1] 

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《金属矿山》2017年第5期197-200,共4页Metal Mine

基　　金：国家重点基础研究发展计划(973计划)项目(编号:2012CBA01205)

摘　　要：白云鄂博选矿厂现弱磁选—强磁选—浮选工艺的弱磁选尾矿再经钙化焙烧—弱磁选选铁后的尾矿REO含量为12.27%,主要成分为稀土氧化物和萤石,氟磷灰石、石英等少量。对盐酸浸出其中稀土氧化物的工艺条件进行了研究。结果显示,在盐酸浓度为1.5 mol/L,浸出温度为45℃,液固比为10∶1 m L/g,浸出时间为60 min,搅拌速度为300 r/min情况下,稀土浸出率可达93.15%,氟浸出率仅为0.23%,表明在控制氟浸出的前提下稀土得到了高效浸出。REO content of tailings from calcium roasting-low intensity magnetic separation tailings from Bayan Obo Plant low intensity magnetic separation-high intensity magnetic separation-flotation was 12. 27%. Main components is rare earth ox-ides,fluorite,small quantity of fluorapatite and quartz. Hydrochloric acid was adopted to study leaching rare earths in material and relevant processing parameters were studied. The results indicated that：when hydrochloric acid concentration is 1. 5 mol/L,leaching temperature is 45 ℃, ratio of liquid to solid is 10 ： 1 mL/g, leaching time is 60 min, stirring rate is 300 r/min,leaching rate of rare earths could reach 93. 15% and the leaching ratio of fluorine was only 0. 23%. Under the low leaching ratio of fluorine premise,the rare earth could be efficiently leached.

关 键 词：白云鄂博尾矿 盐酸浸出 稀土 

分 类 号：TD925.6[矿业工程—选矿]