|
| Study on Kinetics Model of Leaching of REES with Phosphoric Acid |
|
Received:August 06, 2015
Revised:August 11, 2015
Accepted:August 12, 2015
Published Online:December 24, 2015
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1007-7545.2016.01.006 |
| KeyWord:phosphoric acid method; phosphate ore; REEs; kinetics |
| Author | Institution |
| Feng Linyong |
北京矿冶研究总院 |
| Jiang Xunxiong |
北京矿冶研究总院 |
| Wang Shengdong |
北京矿冶研究总院 |
| Fan Yanqing |
北京矿冶研究总院 |
| Zhang Denggao |
北京矿冶研究总院 |
| Liu wei |
北京矿冶研究总院 |
|
| Hits: 2008 |
| Download times: 2334 |
| Abstract: |
| Relationships between kinetics of leaching of REEs from RE-associated phosphate ore and temperature, time, acid concentration and granularity were investigated by phosphoric acid method. The results show that increasing of temperature, time and acid concentration, and reduction of granularity can accelerate leaching of REEs. Leaching process of REEs, close to elementary reaction, is controlled by interfacial chemical reaction with apparent activation energy of 44.6 kJ/mol and apparent reaction order of 0.993. Kinetics mathematical model of leaching of REES relating to temperature, acid concentration and granularity is established by statistic analysis based on shrinking core model. |
| Close |