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A Novel Method of Recovering Rare Earths from Bayan Obo Rare-Earth Concentrate Under Super-Gravity Field

  • Xi Lan
  • Jintao GaoEmail author
  • Zhancheng Guo
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

A novel method of effectively recovering rare earths (REEs) from rare-earth concentrate under super-gravity was proposed in this paper. The reconstructions of rare-earth phases in normal gravity and the separation behaviours of REEs under super-gravity were investigated. It was indicated by the results of the mineral phase reconstructions that the rare-earth phases were transformed from original minerals of bastnaesite and monazite into britholite, rare-earth oxide fluoride, rare-earth ferrate and monazite particles at 1423–1523 K, and there was the only solid phase—rare-earth oxide fluoride phase in the sample at 1773 K. In a super-gravity field, all the rare-earth oxide fluoride crystals were overall intercepted by the filter along the super-gravity direction and effectively separated from the slag melts. The mass fractions of ∑ReO and Ce2O3 in the separated rare-earth oxide fluoride phase increased to 88.31 and 60.76 wt%, the recovery of ∑ReO and Ce2O3 were 90.22 and 95.41%, respectively.

Keywords

Mineral reconstructions Recovery Rare earths Rare-earth concentrate Super-gravity 

Notes

Acknowledgements

This study is supported by the National Natural Science Foundations of China (No. 51774037 and No. 51404025).

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijingPeople’s Republic of China

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