Mass transfer in heap leaching of weathered crust elution deposited rare earth ore with Al_(2)(SO_(4))_(3) solution  

作　　者：Jingqun Yin Dedong Zeng Jun Tian Yaqing Weng 

机构地区：[1]Institute of Applied Chemistry,Jiangxi Academy of Sciences,Nanchang,330096,China [2]School of Chemistry and Chemical Engineering,Nanchang University,Nanchang,330031,China

出　　处：《Journal of Rare Earths》2024年第6期1175-1181,I0007,共8页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51964021,51774156);China’s NationalKey R&D Plan Project(2019YFC060025000)。

摘　　要：In order to increase efficiency and avoid NH^(4+)-N pollution in the leaching process of weathered crust elution-deposited rare earth ores,the mass transfer in heap leaching with Al_(2)(SO_(4))_(3) solution was simulated with column elution and experimentally optimized.The results indicate that the leaching yield is also up to 99%for leaching with aluminum sulfate instead of ammonium sulfate.The optimal flow rate is 60 mL/h,the height equivalent to a theoretical plate(HETP)is 1.29 mm correspondingly.The peak value position of RE^(3+)is 60 mL/h,Fe^(3+)is 100 mL/h,however,Al^(3+)is 150 mL/h,and the heap leaching process has kinetic separation effect.

关 键 词：Raree arths Mass transfer Process optimization Heapleaching Weathered crust elution-deposited rare earth ore 

分 类 号：TF845[冶金工程—有色金属冶金]