Development Review on Leaching Technology and Leaching Agents of Weathered Crust Elution-Deposited Rare Earth Ores

Weathered crust elution-deposited rare earth ores are key strategic resources and the main source of medium and heavy rare earths. This paper summarizes the development of leaching technology of rare earth ores, compares the advantages and disadvantages of the three generations of leaching technolog...

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Bibliographic Details
Published in:Minerals (Basel) 2023-09, Vol.13 (9), p.1223
Main Authors: Xu, Zhigao, Li, Gang, Yang, Huifang, Sha, Aoyang, He, Zhengyan, Tang, Yuchen, Wu, Ming, Qu, Jun
Format: Article
Language:English
Subjects:
Ammonia
Ammonium
Ammonium compounds
Ammonium salts
Crust
Direction
Earth
Earth crust
Efficiency
Elution
Heap leaching
Leachates
Leaching
leaching agent
leaching technology
Methods
Minerals
New technology
Ores
Permeability
Pollution
Rare earth elements
Rare earth metal ores
research progress
Seepage
Technology
Trace elements
Vegetation
weathered crust elution-deposited rare earth ore
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Summary:Weathered crust elution-deposited rare earth ores are key strategic resources and the main source of medium and heavy rare earths. This paper summarizes the development of leaching technology of rare earth ores, compares the advantages and disadvantages of the three generations of leaching technology, and introduces the improved heap leaching technology and the new technology of the leaching–extraction integration and enhanced leaching, focusing on the leaching of weathered crust elution-deposited rare earth ores. In this paper, the development of the leaching agents is expounded, and the research status and the development trend of the composite ammonium salt leaching agent, impurity inhibition leaching agent, swelling inhibition leaching agent, and seepage-promotion leaching agent are also introduced. And this paper summarizes the leaching mechanism and the development direction of leaching agents. Moreover, the future key research direction of weathered crust elution-deposited rare earth ores is proposed, which is green, efficient, safe development and utilization.
ISSN:2075-163X
2075-163X
DOI:10.3390/min13091223