Processing of rare earth phosphate concentrates: A comparative study of pre-leaching with perchloric, hydrochloric, nitric and phosphoric acids and deportment of minor/major elements
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- 作者：K. Stonea ; A.M.T.S. Bandaraa ; G. Senanayakea ; G.Senanayake@murdoch.edu.au" class="auth_mail" title="E-mail the corresponding author ; S. Jayasekeraa ; b
- 关键词：Rare earth ; Acid leaching ; Phosphate ; Fluorapatite ; Uranium ; Thorium ; Deportment
- 刊名：Hydrometallurgy
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：163
- 期：Complete
- 页码：137-147
- 全文大小：1198 K
文摘
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High leaching of calcium and phosphorus in HClO4, HCl and HNO3, but low leaching in H3PO4
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Results consistent with the formation of phosphate/fluoride complex species in solution
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Low leaching of RE/uranyl/thorium ions in H3PO4 due to the formation of phosphate precipitates
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Selective leaching of calcium and some other metals leaving uranium, thorium and REEs in the residue suitable for acid bake