Results 31 to 40 of about 132 (97)

Strength characteristics of weathered crust elution-deposited rare earthores with different porosity ratios

工程科学学报, 2018
The porosity ration of weathered crust elution-deposited rare earth ores is the main factor that affects the leaching results and the stability of the ore body.
YIN Sheng-hua, QI Yan, XIE Fang-fang, CHEN Xun, WANG Lei-ming   +4 more
doaj   +1 more source

Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

, 2020
To reveal seepage mechanism during in-situ leaching process of weathered crust elution deposited rare earth ores with magnesium salt, the effects of particle gradation, particle migration, Atterberg limit on the permeability coefficient were investigated,
Chi, Ruan, Liu, Defeng, Zhang, Zhenyue
core   +1 more source

Hydrochloric Acid Leaching Study of Rare Earth Elements from Moroccan Phosphate

Journal of Chemistry, Volume 2019, Issue 1, 2019., 2019
As part of the valorization of the Moroccan phosphate rock by extraction of rare earths, different experiments on natural Moroccan phosphate from the Gantour Basin (basin of phosphate in the Youssoufia area) were done in the REMATOP laboratory. The response surface methodology was used to study the effects of the influence of different parameters (acid
Marouane Amine, Fatima Asafar, Latifa Bilali, Mehdi Nadifiyine, Alberto Figoli   +4 more
wiley   +1 more source

Effects of cations on rare earth adsorption and desorption in binding sites of montmorillonite

, 2023
The exchangeability of rare earth (RE) in weathered crust elution-deposited rare earth ores largely depends on its interaction with clay minerals, which may be significantly influenced by various cations.
Zhengyan He, Yuchen Tang, Nie, Wenrui, Zhigao Xu, Tang, Yuchen, Jun Qu, Ruan Chi, Wenrui Nie, Sha, Aoyang, Yang, Huifang, He, Zhengyan, Qu, Jun, Xu, Zhigao, Aoyang Sha, Chi, Ruan, Huifang Yang   +15 more
core   +1 more source

Influence of Rare Earth Occurrence States on Extraction Rate in Weathered Crust Elution-Deposited Rare Earth Ores

Yankuang ceshi
The occurrence of rare earth elements (REEs) in weathered crust elution-deposited rare earth ore is very complicated, and only the exchangeable adsorption state REEs can be utilized by the current extraction process, demonstrating that the REE resources ...
Yun ZHU, Lei ZHANG, Ran LU, Lin GUO, Tingting YU, Yihua SHI, Shengfeng MA   +6 more
doaj   +1 more source

Adsorption Behavior Mechanism of Rare Earths by Iron Oxide–Clay Mineral Composites

Metals
Weathered crust elution-deposited rare earth ores represent a significant source of medium and heavy rare earth elements. Their mineralization mechanism fundamentally involves the adsorption and enrichment of rare earth ions on the surfaces of secondary ...
Dan Li, Zhenyue Zhang, Ruan Chi, Zhuo Chen, Hanjun Wu, Xiangyi Deng, Defeng Liu, Wenda Guo   +7 more
doaj   +1 more source

Geochemical and Sr‐Nd‐Pb‐Fe Isotopic Constraints on the Formation of Fe‐Si Oxyhydroxide Deposits at the Ultraslow‐Spreading Southwest Indian Ridge

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 2, February 2024.
Abstract Modern Fe‐Si oxyhydroxide deposits occur in global marine hydrothermal vent sites. Despite their role as biogenic substrates and potential ore resources, much remains unknown about their formation processes. Here, we apply analyses of major and trace elements as well as Sr‐Nd‐Pb‐Fe isotopes combined with 238U‐230Th dating to Fe‐Si ...
Jiangtao Li, Mingxue Sun, Wenlong Qi, Zhe Zhou, Simon V. Hohl, Zhiwei He   +5 more
wiley   +1 more source

Enhanced Elution of Residual Ammonium from Weathered Crust Elution-Deposited Rare Earth Ore Tailings by Ferric Chloride

Separations
The existence of residual ammonium in weathered crust elution-deposited rare earth ore (WREO) tailings will cause serious environmental pollution, and it is necessary to remove it from the ore body. In this work, ferric chloride was applied as the eluent,
Xiaoyan Wu, Jian Feng, Xianping Luo, Fang Zhou, Ruan Chi   +4 more
doaj   +1 more source

Stepwise leaching rare earth from weathered crust elution-deposited rare earth ores by the inhibition leaching of aluminum with HMTA

Environmental Science and Pollution Research
Abstract In the leaching process of rare earth (RE) from weathered crust elution-deposited rare earth ores (WCE-DREO), the exchangeable impurity ions will also be exchanged and enter the RE leachate. Impurity removal must be treated before precipitating RE, which often causes the serious loss of RE and environmental pollution.
Zhengyan He, Qin Zuo, Yuchen Tang, Wenqian Cui, zhigao xu, Ming Wu, Jun Qu, Ruan Chi   +7 more
openaire   +2 more sources

Simulation of one-dimensional column leaching of weathered crust elution-deposited rare earth ore

Transactions of Nonferrous Metals Society of China, 2019
Abstract The ion exchange model of the leaching process was determined via batch leaching experiments using the Kerr model, with the selectivity coefficient experimentally determined to be 12.59×10−10 L2/g2. Solute transport laws of ammonium ions (NH4+) and rare earth ions (RE3+) in column leaching were described by the convection−dispersion equation
Ping LONG, Guan-shi WANG, Jun TIAN, Shi-li HU, Si-hai LUO   +4 more
openaire   +1 more source