Leaching behaviors of iron and aluminum elements of ion-absorbed-rare-earth ore with a new impurity depressant

Ion-absorbed rare-earth ore is an important mineral resource which is widely extracted by in-situ leaching process. And such process generates a significant amount of impurities such as aluminum and iron ions in leaching solution simultaneously. The surface characteristics and interactions by infrar...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2014-09, Vol.24 (9), p.2986-2990
Main Authors: QIU, Ting-sheng, FANG, Xi-hui, WU, Hong-qiang, ZENG, Qing-hua, ZHU, Dong-mei
Format: Article
Language:English
Subjects:
Aluminum
aluminum and iron impurity
Depressants
depression mechanism
Impurities
ion-absorbed-type rare-earth ore
Iron
Leaching
Mineral resources
Rare earth metals
Surface properties
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Summary:Ion-absorbed rare-earth ore is an important mineral resource which is widely extracted by in-situ leaching process. And such process generates a significant amount of impurities such as aluminum and iron ions in leaching solution simultaneously. The surface characteristics and interactions by infrared spectroscopy and X-ray diffraction were studied to optimize the leaching conditions. It is found that the environment-friendly depressant LG-01 can react with the impurity ions through the formation of a new complex on the surface of leaching residues. Thus, it reduces significantly the concentration of impurity ions in leaching solution and improves the leaching rate of rare-earth ore. Moreover, a leaching rate of 95.6% and an impurity removal rate of 92% have been achieved under the optimized conditions.
ISSN:1003-6326
DOI:10.1016/S1003-6326(14)63435-X