Removing aluminum from a low-concentration lixivium of weathered crust elution-deposited rare earth ore with neutralizing hydrolysis  

作　　者：Xian-Ping Luo Li-Ping Zou Pei-Long Ma Cai-Gui Luo Jing Xu Xue-Kun Tang 

机构地区：[1]Faculty of Resource and Environmental Engineering,JiangxiUniversity of Science and Technology,Ganzhou 341000,China [2]Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control,Gauzhou 341000,China [3]Key Laboratory of Southern Ionic-Type Rare Earth Resources Development and Application,Ministry of Education,Ganzhou 341000,China [4]Faculty of Engineering,University of Alberta,Edmonton,AB T6G2V4,Canada

出　　处：《Rare Metals》2017年第8期685-690,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51404112);theNational Key Technology R&D Program(No.2012BAC11B07);the Technology Program for Benefitting the People(No.2013GS360203);the Program for Talents Training of“Gan Po Excellence 555 Project”;the Program for New Century Excellent Talents in University(No.NCET-10-0183);the Program for Main Subject,Technology Leaders of Jiangxi Province(No.2010DD01200)

摘　　要：Aluminum,the main impurity in the lixivium of weathered crust elution deposited rare earth ore,not only results in an increasing consumption of precipitant in the rare earth precipitation process,but also lowers the purity of final rare earth product.Aluminum in the weathered crust elution-deposited rare earth ore lixivium should be removed.Neutralizing hydrolysis method was employed to remove aluminum from the lixivium.Hexamethylenetetramine was found to be the optimum pH regulator for the removal of aluminum in the low concentration.When used to adjust the pH value of the lixivium to 5.0,aluminum in the lixivium can be effectively removed in the form of aluminum hydroxide precipitation with removal rate of 97.60%.It shows that hexamethylenetetramine has a good effect on the removing of aluminum ions from the lowconcentration lixivium.Moreover,hexamethylenetetramine in removing aluminum from lixivium has little adverse effect on the RE precipitation process.Aluminum,the main impurity in the lixivium of weathered crust elution deposited rare earth ore,not only results in an increasing consumption of precipitant in the rare earth precipitation process,but also lowers the purity of final rare earth product.Aluminum in the weathered crust elution-deposited rare earth ore lixivium should be removed.Neutralizing hydrolysis method was employed to remove aluminum from the lixivium.Hexamethylenetetramine was found to be the optimum pH regulator for the removal of aluminum in the low concentration.When used to adjust the pH value of the lixivium to 5.0,aluminum in the lixivium can be effectively removed in the form of aluminum hydroxide precipitation with removal rate of 97.60%.It shows that hexamethylenetetramine has a good effect on the removing of aluminum ions from the lowconcentration lixivium.Moreover,hexamethylenetetramine in removing aluminum from lixivium has little adverse effect on the RE precipitation process.

关 键 词：Weathered crust elution-deposited rare earth ore Lixivium  Aluminum removing HEXAMETHYLENETETRAMINE 

分 类 号：TD955[矿业工程—选矿]