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| Effect of Agitator Parameter Optimization on Flow Field of Vanadium Shale Leaching Tank |
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Received:June 10, 2019
Revised:June 12, 2019
Accepted:June 14, 2019
Published Online:October 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.11.013 |
| KeyWord:vanadium shale; leaching tank; optimization; numerical simulation; velocity field; concentration field |
| Author | Institution |
| QI Fang |
武汉科技大学 资源与环境工程学院 |
| ZHANG Yi-min |
武汉科技大学 资源与环境工程学院 |
| XUE Nan-nan |
武汉科技大学 资源与环境工程学院 |
| LIU Tao |
武汉科技大学 资源与环境工程学院 |
| HUANG Jing |
武汉科技大学 资源与环境工程学院 |
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| Abstract: |
| Stirring leaching tank is main operation unit in wet leaching section of vanadium shale, but there exist some problems in industrial production, such as uneven distribution of solid phase, easy deposition at the bottom of tank for minerals and so on. By changing number of blade layers, blade layer spacing and bottom height of the lower pitch for double propeller, combined with computational fluid dynamics software FLUENT, distribution characteristics of velocity field and concentration field of particles at different radial and axial positions were simulated and analyzed. The results show that increasing number of agitator layers can effectively reduce concentration gradient in leaching tank and promote full mixing between solid and liquid. Increasing double blade layer spacing can alleviate problem of lower fluid velocity upper part of leaching tank. The layer spacing at 0.33D~0.53D is mainly "merging flow", which is more beneficial to strengthen contact collision between solid and liquid phase and full mixing in the region between blades. When the height of the lowest blade of double propeller is 0.13D~0.23D, the axial velocity of particles at bottom of tank is strengthened, so as to effectively alleviate problem of mineral particles deposition at the bottom of tank and promote effective dispersion of solid particles. |
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