Results 21 to 30 of about 123 (90)

Promotion Mechanism of Ammonium Formate in Ammonium Salt Leaching Process for Weathered Crust Elution-Deposited Rare Earth Ores

, 2023
Weathered crust elution-deposited rare earth ores (WREOs) are significant strategic mineral resources. In industry, in situ leaching technology is usually applied with ammonium chloride and ammonium sulfate as the leaching solution.
Qutian Zhang, Fang Zhou, Junxia Yu, Ruan Chi, Xing Gao, Dandan Zhang, Yongwei Ma   +6 more
core   +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

Partial rehydration of tubular halloysite (7 angstrom) immersed in La(NO3)(3) solution for 3 years and its implication for understanding REE occurrence in weathered crust elution-deposited rare earth ores

, 2021
Clay minerals are the main carriers of rare earth elements (REE) in weathered crust elution-deposited rare earth (WED-RE) ores. The clay mineral-water interface reaction is among the most important interactions controlling the aggregation and ...
Zhang, Huan, Zhou, Junming, Li, Yun, Yuan, Peng, Fan, Wenxiao, Liu, Hongmei, Li, Mengyuan, Liu, Dong   +7 more
core   +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

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

Application of chromatographic plate theory on the weathered crust elution-deposited rare earth ore with carboxylate

Physicochemical Problems of Mineral Processing, 2021
Physicochemical Problems of Mineral Processing. Vol. 57, 2021, Issue 4, s. 48-62 ; Fizykochemiczne Problemy Przeróbki Kopalin (1967-1976) ; Physicochemical Problems of Mineral Processing ISSN 1643-1049 (od 2000) ; Fizykochemiczne Problemy Mineralurgii ISSN 0137-1282 (1977-1999 ...
Zhang, Zhenyue, Wang, Guangshuai, Li, Chunhua, Chi, Ruan, Long, Fei, Chen, Zhuo, Chi, Xiaowang, Liu, Defeng   +7 more
openaire   +2 more sources

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

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

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

Preparation of Modified Montmorillonite and Its Application to Rare Earth Adsorption

, 2019
Montmorillonite, the major clay mineral in the tailings of weathered crust elution-deposited rare earth ores, was modified as an excellent adsorbent to enrich rare earth ions from solutions.
Yinying Ding, Jian Feng, Fang Zhou, Ruan Chi, Xu Liu, Qi Liu   +5 more
core   +1 more source