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Erschienen in:

2018 | OriginalPaper | Buchkapitel

Study on Direct Reduction Melting Separation-Leaching Process of Disposal Rare Earth Composite Iron Ore

verfasst von : Ma Tengfei, She Xuefeng, Feng FU, Wang Jingsong

Erschienen in: 9th International Symposium on High-Temperature Metallurgical Processing

Verlag: Springer International Publishing

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Abstract

In this paper the direct reduction melting separation-leaching process is investigated on recovering rare earth from rare earth Bayan Obo complex iron ore (REBOCIO). The REBOCIO was reduced and melting separated to produce iron nugget and rare-earth-rich slag at 1400 °C for 12 or 15 min. The RE₂O₃ is enriched into Ce_4.667(SiO₄)O or Ca₃Ce₂[(Si,P)₃O₄]₃F, which closely depend on chemical components, especially basic. The optimal acid-leaching parameters of rare earth elements from the rare earth slag are suggested as the hydrochloric acid concentration, the ratio of solid to liquid, leaching temperature, and the leaching time are 1 mol/L, 1:14, 50 °C and 120 min, respectively. The rare earth elements leaching efficiency are more than 95%. Adding of calcium CaCO₃ and sodium Na₂CO₃ in direct reduction process have great influence on leaching efficiency of thorium.

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Titel: Study on Direct Reduction Melting Separation-Leaching Process of Disposal Rare Earth Composite Iron Ore
verfasst von: Ma Tengfei
She Xuefeng
Feng FU
Wang Jingsong
Verlag: Springer International Publishing
Buch: 9th International Symposium on High-Temperature Metallurgical Processing
Print ISBN: 978-3-319-72137-8

Electronic ISBN: 978-3-319-72138-5

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-319-72138-5_41

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