Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1260474 | Journal of Rare Earths | 2010 | 5 Pages |
Abstract
For increasing reaction rate and reducing decomposing temperature, TG-DTA, XRD, SEM and Chemical analysis were used to study the kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl2. The results showed that the reaction rate increased with increasing of NaC-CaCl2 addition, CaO addition, and decomposition temperature. The kinetics of mixed rare earths minerals decomposed by CaO conformed to 1-2/3X-(1-X)2/3=kdt mode. The decomposition reaction rate was controlled by two steps, and the activation energy was decreased with adding of NaCl-CaCl2 melting salt. The micro-pattern of products was loosening and porous with NaCl-CaCl2 in decomposition system.
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