Rare earth double sulfates from pre-concentrated bastnasite

Date

2008-08-01

Author

Kul, M.
Topkaya, Yavuz Ali
Karakaya, İshak

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A mixture of rare earth double sulfates was produced from a Turkish bastnasite-containing pre-concentrate (low grade concentrate) by sulfuric acid baking, subsequent water leaching and precipitation with sodium sulfate. The results of acid baking and leaching indicated that recoveries of rare earth elements up to 90% were readily obtained and the recovery of hydrofluoric acid as a by-product was also possible. Reasonable decontamination of the rare earth double sulfate salt from impurities such as Th, Fe, Al and Mg was possible by rapid precipitation at 50 degrees C using 1.25 times the stoichiometric amount of Na2SO4. The total rare earth double sulfate content (TREDS) was > 90% and analysed 17.3% La, 15.6% Ce, 3.2% Nd, 1.1% Pr, 0.3% Sm, 0.03% Eu, 0.01% Yb and 0.02% Y together with about 0.7% Ca, Fe, All and other impurities.

Subject Keywords

Rare earths, Precipitation, Leaching, Baking, Double sulfates, Basmasite

URI

https://hdl.handle.net/11511/38082

Journal

HYDROMETALLURGY

DOI

https://doi.org/10.1016/j.hydromet.2007.11.008

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

M. Kul, Y. A. Topkaya, and İ. Karakaya, “Rare earth double sulfates from pre-concentrated bastnasite,” HYDROMETALLURGY, pp. 129–135, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38082.