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| Study on A12O3 Dissolution Kinetics of High Titanium Bauxite under High Pressure Hydration Conditions |
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Received:July 13, 2018
Revised:July 16, 2018
Accepted:July 17, 2018
Published Online:September 19, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.10.008 |
| KeyWord:high titanium bauxite; high pressure hydration; kinetic equation |
| Author | Institution |
| litao |
贵州大学材料与冶金学院 |
| jinhuixin |
贵州大学材料与冶金学院 |
| xiaochong |
贵州大学材料与冶金学院 |
| liuhongling |
贵州大学材料与冶金学院 |
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| Abstract: |
| High titanium bauxite was treated by high pressure hydration method. Its dissolution process was analyzed from point of view of dynamic. Through calculation of experimental results and quasi cooperative graph, it is concluded that the apparent activation energy of dissolution of aluminum minerals is 23.431 kJ/mol, which shows dissolution process of aluminum minerals is controlled by internal diffusion with apparent rate constant kg=0.6381exp(-23421/RT). The kinetic equation of dissolution of aluminum minerals in the process of high hydrated digestion of high titanium bauxite is
1- 2/3 X-〖(1-X)〗^(2/3)=0.6381C_NaOH^3.28587 r^0.58531 e^(-23421/RT) t |
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