Results 71 to 80 of about 123 (90)

Leach of the weathering crust elution-deposited rare earth ore for low environmental pollution with a combination of (NH4)2SO4 and EDTA

Chemosphere, 2018
High concentration of ammonium sulfate, a typical leaching agent, was often used in the mining process of the weathering crust elution-deposited rare earth ore. After mining, a lot of ammonia nitrogen and labile heavy metal fractions were residual in tailings, which may result in a huge potential risk to the environment.
Jie, Tang, Jiyang, Qiao, Qiang, Xue, Fei, Liu, Honghan, Chen, Guochen, Zhang   +5 more
openaire   +2 more sources

Mass transfer process of leaching weathered crust elution-deposited rare earth ore with magnesium salts

2018
Physicochemical Problems of Mineral Processing; ISSN 2084 ...
Zhuo, Chen, Zhengyue, Zhang, Zhengyan, He, Ru-An, Chi   +3 more
openaire   +1 more source

Stepwise Anti-Impurity Leaching Rare Earth from Weathered Crust Elution-Deposited Rare Earth Ores

2023
Zhengyan He, Qin Zuo, Yuchen Tang, Wenqian Cui, Zhigao Xu, Ming Wu, Jun Qu   +6 more
openaire   +1 more source

Influence of surfactant on clay swelling inhibition of weathered crust elution-deposited rare earth ores

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2023
Fang Zhou, Dandan Zhang, Yixin Zhang, Bona Deng, Qutian Zhang, Junxia Yu, Chunqiao Xiao, Ruan Chi   +7 more
openaire   +1 more source

Enhanced leaching processing of the weathered crust elution deposited rare earth ores using humic acid

Weathered crust elution-deposited rare earth ores (WREOs) serve as a major source of medium and heavy rare earth elements(REEs). Currently, in-situ leaching with ammonium sulfate is widely used for REEs extraction from WREOs. However, this method is often limited by low leaching efficiency and slow leaching kinetics as well as poor mass transfer.
Fang Zhou, Lei Shu, Shiding Dong, Bona Deng, Chunqiao Xiao, Yuefei Zhang, Wenjie Zhou, Ruan Chi   +7 more
openaire   +1 more source

Vertical distribution and occurrence state of the residual leaching agent (ammonium sulfate) in the weathered crust elution-deposited rare earth ore

Journal of Environmental Management, 2021
Junxia Yu, Haobo Hou, Ruan Chi
exaly  

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

Minerals Engineering, 2021
Junxia Yu, Fang Zhou, Chunqiao Xiao
exaly  

Dynamic elution of residual ammonium leaching agent from weathered crust elution-deposited rare earth tailings by magnesium chloride

Environmental Research, 2022
Junxia Yu, Haobo Hou, Ruan Chi
exaly  

Swelling of clay minerals during the leaching process of weathered crust elution-deposited rare earth ores by magnesium salts

Powder Technology, 2020
Zhuo Chen, Zhenyue Zhang, Wendou Chen
exaly  

Enhanced leaching process of a low-grade weathered crust elution-deposited rare earth ore with carboxymethyl sesbania gum

Hydrometallurgy, 2013
Xuekun Tang, Ji Chen, Xianping Luo
exaly