Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2004, Vol. 25 ›› Issue (4): 378-381.DOI: -

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Behavior of thermal decomposition of bastnaesite with rare earth nitrate added to it

Wu, Wen-Yuan (1); Chen, Jie (1); Sun, Shu-Chen (1); Tu, Gan-Feng (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-04-15 Published:2013-06-24
  • Contact: Wu, W.-Y.
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Abstract: To seek the way to enable bastnaesite to be decomposed at lower temperature, process of thermal decomposition of bastnaesite to which 5% (mass fraction) of rare earth nitrate had been added was developed by TG-DTA, and the phase compositions of different calcined products were investigated by XRD at 430°C and 510°C separately. The results showed that bastnaesite is decomposed partly with no oxidant added to it at 430°C, while it can be decomposed completely with 5% (mass fraction) of the oxidant added to it. The products decomposed are mainly REOF and 2CeO2·CeF3 accompanied with a bit of 4CeO2·Ce2OK3. On the other hand, bastnaesite can be completely decomposed of 510°C on which no apparent effect can be found when adding the oxidant to it.

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