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

Ting-sheng Qiu, Xi-hui Fang, Hong-qiang Wu, Qing-hua Zeng, Dong-mei Zhu

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    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.
    Original languageEnglish
    Pages (from-to)2986-2990
    Number of pages5
    JournalNonferrous Metals Society of China. Transactions
    Volume24
    Issue number9
    DOIs
    Publication statusPublished - 2014

    Keywords

    • inclusions
    • iron ores
    • leaching
    • metal ions
    • rare earth metals

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