复合铵盐浸出风化壳淋积型稀土矿的研究  

Study on Leaching of Rare Earth from Weathered Crust Elution Deposited Rare Earth Ore with Complex Ammonium Agents

作　　者：张臻悦[1] 徐志高[1] 吴明[1] 张婷婷[1] 李琼[1] 池汝安[1] 

机构地区：[1]武汉工程大学绿色化工过程教育部重点实验室,湖北省新型反应器与绿色化学工艺重点实验室,武汉430073

出　　处：《有色金属（冶炼部分）》2013年第4期32-35,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(50974098;51274152);教育部长江学者和创新团队发展计划项目(IRT0974)

摘　　要：采用复合铵盐作浸出剂浸出风化壳淋积型稀土矿中的稀土。考察浸出剂的配比、浓度、液固比、流速、pH等因素对稀土浸出率的影响。结果表明,NH4Cl、NH4NO3、(NH4)2SO4质量比为4∶5∶6的复合铵盐浸出剂为最佳组合;液固比越大、流速越慢,浸出率越高;当浸出剂浓度为10g/L、pH=3.5时浸出效果最好。Rare earth （RE） was leached from weathered crust elution-deposited rare earth ore with composite ammonium salts as leaching agent. The effects of ratio of composite ammonium salts and concentration of leaching agent, ratio of liquid to solid （L/S）, flow rate and pH value on leaching rate of RE were investigated. The results show that the best mass ratio of leaching agent of NH4C1, NH4NO3, （NH4）2SO4 is 4 ： 5 ： 6. The bigger L/S and lower flow velocity is, the higher leaching rate is. The best leaching effect is achieved when concentration of leaching agent is 10 g/L and pH value is 3.5.

关 键 词：风化壳淋积型稀土矿 复合浸出剂 铵盐 配比 稀土 

分 类 号：TF845[冶金工程—有色金属冶金]