Production of mixed rare earth oxide powder from a thorium containing complex Bastnasite ore
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Tarih
2021-02
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Journals & Books
Erişim Hakkı
info:eu-repo/semantics/restrictedAccess
Attribution-NonCommercial-ShareAlike 3.0 United States
Attribution-NonCommercial-ShareAlike 3.0 United States
Özet
The production of mixed rare earth oxide powder from a thorium containing bastnasite ore by sulfuric acid bake-water leaching followed by precipitation with oxalic acid and thermal decomposition of the oxalates was investigated. The sulfuric acid baking was performed at 250 °C and the optimum baking time was found to be 3 h. Using deionized water as lixiviant, 92.6% La, 86.8% Ce, 86.9% Pr, 82.3% Nd, 95.4% Th and 31% Y were dissolved from the baked ore at 25 °C after 30 min of leaching. The effect of solid-to-liquid ratio on the dissolution of the rare earth elements and thorium shows that when the solid ratio in the water increased from 1:10 to 1:3, the dissolution percentage decreased. The final mixed rare earth oxide powder contained 88.54% REO and 6% ThO2 together with small amounts of other impurities. The SEM mapping results revealed that the produced REO has an irregular crystal shape. Based on the experimental results obtained from the current study, a flowsheet was proposed for the production of mixed rare earth oxide powder from a specific complex bastnasite ore.
Açıklama
Anahtar Kelimeler
Mixed Rare Earth Oxide Powder, Thorium, Bastnasite Ore, Baking, Leaching, Precipitation
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
379
Sayı
Künye
Özsaraç, Ş., Kurşunoğlu, S., Hussaini, S., Top, S., Ichlas, Z.T., Gökçen, H.S., Kaya, M. (2021). Production of mixed rare earth oxide powder from a thorium containing complex Bastnasite ore. Powder Technology, 379, pp.641-654. DOI:https://dx.doi.org/10.1016/j.powtec.2020.10.086
