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Enrichment and economic value of secondary rare earths dominated by europium and yttrium in black earthy waste of the Maoniuping rare earth deposit, Sichuan, China



Enrichment and economic value of secondary rare earths dominated by europium and yttrium in black earthy waste of the Maoniuping rare earth deposit, Sichuan, China



Sichuan Dizhi Xuebao = Acta Geologica Sichuan 14(4): 297-303



A black earthy waste with an argillation ratio of 14.33%-24.60% occurs widely in the oxidized zone of the Maoniuping REE ore deposit. Fractionation of secondary REE in a weakly alkaline medium has resulted in the enrichment of MREE and HREE. Amorphous Fe-Mn material in the black earthy waste is the carrier of secondary REE dominated by Eu and Y. Comprehensive utilization of the ore sludge is of great economic and social significance.

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