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| Aspect ratio research based on magneto-hydrodynamic stability in aluminum reduction cells |
| Received:July 23, 2008 |
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| DOI：10.7511/jslx20102007 |
| KeyWord:aluminum reduction cells magneto-hydrodynamic stability model coupling fourier expansion method aspect ratio |
| Author | Institution |
| 李劼 |
中南大学 冶金科学与工程学院,长沙 |
| 徐宇杰 |
中南大学 冶金科学与工程学院,长沙 |
| 刘伟 |
中南大学 冶金科学与工程学院,长沙 |
| 赖延清 |
中南大学 冶金科学与工程学院,长沙 |
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| Abstract: |
| The magneto-hydrodynamic(MHD) stability in aluminium reduction cells has significant effect on the process of aluminium production. In this paper, a Fourier expansion method was used to resolve the MHD stability model, in which the electro-magnetic distribution obtained from entity simulation was introduced, and the problem of model coupling of wave was emphatically analyzed. Based on these, the impact of aspect ratio of cells on the stability was studied on a 320kA cell. The results show that the unstable components of the wave assembly in a low frequency region of the spectrum figure, where the models of gravity wave are dense; without considering the influence of bus bars, increasing aspect ratio is in favor of improving MHD stability in cells. |
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