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| Numerical Modeling of Current Efficiency in Large-scale Aluminum Reduction Cells |
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Received:October 08, 2014
Revised:October 10, 2014
Accepted:October 10, 2014
Published Online:February 15, 2015
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| DOI：10.3969/j.issn.1007-7545.2015.03.007 |
| KeyWord:aluminum reduction cell; current efficiency; numerical simulation; multi phase flow |
| Author | Institution |
| QIU Zhejing |
南瑞武汉电气设备与工程能效测评中心 |
| ZHANG Hongliang |
中南大学冶金与环境学院 |
| XU Yujie |
中南大学冶金与环境学院 |
| WANG Zhengyu |
南瑞武汉电气设备与工程能效测评中心 |
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| Abstract: |
| The mechanism of current loss and strong turbulence characteristics in large-scale aluminum cells (>400 kA) were analyzed. Mass transfer nearby metal-bath interface was described with surface renewal model. The current loss calculation equation, mass transfer coefficient equation and current efficiency (CE) calculation equation were built. With combination of multi-phase fluid mechanics and molten salt electrochemistry theories, a global numerical calculation model of CE associated with melt flow was established. This model was effectively applied to analyze global and local CE in 400 kA-grade aluminum reduction cells. The calculated time-averaged CE is 92.57%. |
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