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| Roasting Reaction Kinetics of Waste Rare Earth Fluorescent Powders with So-dium Hydroxide |
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Received:October 19, 2016
Revised:October 25, 2016
Accepted:October 31, 2016
Published Online:January 22, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.02.008 |
| KeyWord:waste rare earth fluorescent powders; sodium hydroxide; roasting; kinetics |
| Author | Institution |
| WANG Ruixiang |
江西理工大学 冶金与化学工程学院 |
| LIAO Gen |
江西理工大学 冶金与化学工程学院 |
| WEN Gongyu |
江西理工大学 冶金与化学工程学院 |
| Guo Yuedong |
江西理工大学 冶金与化学工程学院 |
| ZHANG Zhaoxue |
江西理工大学 冶金与化学工程学院 |
| XIONG Jiachun |
江西理工大学 冶金与化学工程学院 |
| XIE Boyi |
江西理工大学 冶金与化学工程学院 |
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| Abstract: |
| Roasting reaction kinetics of waste rare earth fluorescent powders with sodium hydroxide was studied. The effects of roasting temperature and ratio of sodium hydroxide to waste rare earth fluorescent powders on roasting reaction rate were investigated. Model of reaction kinetics was obtained. The results show that roasting process meets shrinking core model with apparent activation energy of 77.512 kJ/mol. Chemical reaction rate has significant influence on reaction process. The kinetic equation is 1-(1-x)1/3=0.4181×exp[-77512/(RT)]t. |
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