从蒸馏渣中回收稀土工艺研究  

Study on Recovery of Rare Earth from Distillation Slag

作　　者：赖耀斌 徐建兵 李忠岐 梁鑫 陈冬英 LAI Yao-bin;XU Jian-bing;LI Zhong-qi;LIANG Xin;CHEN Dong-ying(Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd.,Ganzhou 341000,Jiangxi,China;National Engineering Research Center for Ionic Rare Earth,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州有色冶金研究所有限公司,江西赣州341000 [2]国家离子型稀土资源高效开发利用工程技术研究中心,江西贛州341000

出　　处：《有色金属（冶炼部分）》2021年第9期80-83,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省重点研发计划项目(20202BBGL73112);赣州市重点研发计划项目(赣市科发[2020]60号)。

摘　　要：以稀土电解熔盐渣经矿相重构—真空蒸馏处理后的蒸馏渣为原料,采用盐酸酸浸提取蒸馏渣中的稀土,研究了酸浸时间、酸浸温度、盐酸浓度、液固比(L/S)对稀土和铁浸出率的影响。结果表明,在酸浸温度50℃、盐酸浓度4mol/L、酸浸时间1h、液固比4的较优工艺条件下,稀土浸出率高达99.88%,铁浸出率为44.43%,达到了稀土优先溶出的目的。Applying distillation slag of molten salt slag of rare earth electrolysis treated by mineral phase reconstruction and vacuum distillation as raw material,rare earth was extracted by hydrochloric acid leaching.Effects of acidic leaching time,acidic leaching temperature,concentration of hydrochloric acid,and L/S on leaching rate of rare earth and iron were studied.The results show that leaching rate of rare earth and iron is 99.88%and 44.43%respectively under the optimum conditions including acidic leaching temperature of 50℃,concentration of hydrochloric acid of 4 mol/L,acidic leaching time of 1 h,and L/S=4.The purpose of selective dissolution of rare earth is achieved.

关 键 词：稀土电解熔盐渣 蒸馏渣 浸出 稀土 回收 

分 类 号：TF845[冶金工程—有色金属冶金]