Oxidative Roasting–Selective Pressure Leaching Process for Rare Earth Recovery from NdFeB Magnet Scrap

2020 ◽  
Vol 73 (3) ◽  
pp. 703-711
Author(s):  
Yinju Jiang ◽  
Yongchun Deng ◽  
Wenbin Xin ◽  
Chao Guo
Keyword(s):  
Rare Earth ◽  
Selective Pressure ◽  
Pressure Leaching ◽  
Ndfeb Magnet ◽  
Leaching Process ◽  
Oxidative Roasting

Effect of potassium chloride on leaching process of residual ammonium from weathered crust elution-deposited rare earth ore tailings

2021 ◽  
Vol 163 ◽  
pp. 106800
Author(s):  
Jian Feng ◽  
Junxia Yu ◽  
Shuxin Huang ◽  
Xiaoyan Wu ◽  
Fang Zhou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Potassium Chloride ◽  
Leaching Process ◽  
Weathered Crust

scholarly journals Experimental measurements of the permeability characteristics of rare earth ore under the hydro-chemical coupling effect

RSC Advances ◽  
2018 ◽  
Vol 8 (21) ◽  
pp. 11652-11660 ◽  
Author(s):  
Xiaojun Wang ◽  
Yulong Zhuo ◽  
Kui Zhao ◽  
Wen Zhong
Keyword(s):  
Rare Earth ◽  
Coupling Effect ◽  
Experimental Measurements ◽  
Permeability Characteristics ◽  
Leaching Process ◽  
Chemical Coupling ◽  
Coupling Processes

Two coupling processes—solution seepage and chemical replacement—occur in the in situ leaching process of ion-absorbed-rare-earth ore.

A discussion on the leaching process of the ion-adsorption type rare earth ore with the electrical double layer model

2018 ◽  
Vol 120 ◽  
pp. 35-43 ◽  
Author(s):  
Xiao Yanfei ◽  
Gao Guohua ◽  
Huang Li ◽  
Feng Zongyu ◽  
Lai Fuguo ◽  
...  
Keyword(s):  
Rare Earth ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Ion Adsorption ◽  
Layer Model ◽  
Leaching Process ◽  
Double Layer Model

Sustainable Recycling of Rare-Earth Elements from NdFeB Magnet Swarf: Techno-Economic and Environmental Perspectives

2021 ◽  
Author(s):  
Nighat Afroz Chowdhury ◽  
Sidi Deng ◽  
Hongyue Jin ◽  
Denis Prodius ◽  
John W. Sutherland ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ndfeb Magnet

Numerical Simulation of the Mass Transfer for Rare-Earth Concentrate in Leaching Process

2015 ◽  
pp. 135-144
Author(s):  
Tingyao Liu ◽  
Yong Sheng ◽  
Teng Yang ◽  
Bao Wang ◽  
Lihui Han ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Rare Earth ◽  
Leaching Process

Recovery of rare earth elements from Dicranopteris dichotoma by an enhanced ion exchange leaching process

2018 ◽  
Vol 130 ◽  
pp. 208-213 ◽  
Author(s):  
Zeinab Chour ◽  
Baptiste Laubie ◽  
Jean Louis Morel ◽  
Yetao Tang ◽  
Rongliang Qiu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Rare Earth Elements ◽  
Leaching Process ◽  
Dicranopteris Dichotoma

Column leaching process of rare earth and aluminum from weathered crust elution-deposited rare earth ore with ammonium salts

2016 ◽  
Vol 26 (11) ◽  
pp. 3024-3033 ◽  
Author(s):  
Zheng-yan HE ◽  
Zhen-yue ZHANG ◽  
Jun-xia YU ◽  
Zhi-gao XU ◽  
Yuan-lai XU ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ammonium Salts ◽  
Column Leaching ◽  
Leaching Process ◽  
Weathered Crust

Recovery of Rare Earth Elements from NdFeB Magnet Scraps by Pyrometallurgical Processes

2015 ◽  
pp. 239-248
Author(s):  
Yuyang Bian ◽  
Shuqiang Guo ◽  
Kai Tang ◽  
Lan Jiang ◽  
Changyuan Lu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ndfeb Magnet

scholarly journals Extraction of Rare Earth Elements from Chloride Media with Tetrabutyl Diglycolamide in 1-Octanol Modified Carbon Dioxide

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 429 ◽  
Author(s):  
Mary Case ◽  
Robert Fox ◽  
Donna Baek ◽  
Chien Wai
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Modern World ◽  
Ndfeb Magnet ◽  
Phosphor Material ◽  
Aqueous Chloride ◽  
Hcl Concentration ◽  
Optimized Conditions

Rare earth elements (REEs) are critical to our modern world. Recycling REEs from used products could help with potential supply issues. Extracting REEs from chloride media with tetrabutyl diglycolamide (TBDGA) in carbon dioxide could help recycle REEs with less waste than traditional solvents. Carbon dioxide as a solvent is inexpensive, inert, and reusable. Conditions for extraction of Eu from aqueous chloride media were optimized by varying moles percent of 1-octanol modifier, temperature, pressure, Eu concentration, TBDGA concentration, Cl− concentration, and HCl concentration. These optimized conditions were tested on a Y, Ce, Eu, Tb simulant material, REEs containing NdFeB magnets, and lighting phosphor material. The optimized conditions were found to be 23 °C, 24.1 MPa, 0.5 mol% 1-octanol, with an excess of TBDGA. At these conditions 95 ± 2% Eu was extracted from 8 M (mol/m3) HCl. Extraction from the mixed REE simulate material resulted in separation of Y, Eu, and Tb from the Ce which remained in the aqueous solution. The extraction on NdFeB magnet dissolved into 8 M HCl resulted in extraction of Pr, Nd, Dy, and Fe >97%. This results in a separation from B, Al, and Ni. Extraction from a trichromatic lighting phosphor leachate resulted in extraction of Y and Eu >93% and no extraction of Ba, Mg, and Al.

Molecular dynamics simulation of aluminum inhibited leaching during ion-adsorbed type rare earth ore leaching process

2019 ◽  
Vol 37 (12) ◽  
pp. 1334-1340
Author(s):  
Dongmei Zhu ◽  
Tingsheng Qiu ◽  
Jianfeng Zhong ◽  
Qinghua Zeng ◽  
Xihui Fang
Keyword(s):  
Molecular Dynamics ◽  
Rare Earth ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Leaching Process
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