Numerical simulation of gas-liquid two-phase flow in aluminum reduction cells with perforated anodes

doi:10.3969/j.issn.0438-1157.2013.10.017

CIESC Journal ›› 2013, Vol. 64 ›› Issue (10): 3612-3619.DOI: 10.3969/j.issn.0438-1157.2013.10.017

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Numerical simulation of gas-liquid two-phase flow in aluminum reduction cells with perforated anodes

ZHAN Shuiqing¹, ZHOU Jiemin¹, LI Mao¹, DONG Ying¹, LIU Zhiming², ZHOU Yiwen², YANG Jianhong²

1. School of Energy Science and Engineering, Central South University, Changsha 410083, Hunan, China;
2. Zhengzhou Research Institute, CHALCO Ltd., Zhengzhou 450041, Henan, China

Received:2012-12-18 Revised:2013-05-08 Online:2013-10-05 Published:2013-10-05
Supported by:
supported by the High-tech Research and Development Program of China(2010AA065201),the National Natural Science Foundation of China(50974127,50876116)and the Fundamental Research Funds for the Central Universities of Central South University(2013zzts038).

开孔阳极铝电解槽熔体中气液两相流数值模拟

詹水清¹, 周孑民¹, 李茂¹, 董英¹, 刘志明², 周益文², 杨建红²

1. 中南大学能源科学与工程学院, 湖南长沙 410083;
2. 中国铝业股份有限公司郑州研究院, 河南郑州 450041

通讯作者: 李茂
作者简介:詹水清(1986-),男,博士研究生。
基金资助:
国家高技术研究发展计划项目(2010AA065201);国家自然科学基金项目(50974127,50876116);中南大学中央高校基本科研业务费专项资金资助项目(2013zzts038)

Abstract

Abstract: Numerical simulation of anodic bubble/electrolyte two-phase flow in the melts of aluminum reduction cells with the Euler-Euler two-fluid model was conducted based on computational fluid dynamics(CFD).A modified k-εturbulence model was used to describe liquid phase turbulence in the simulation,by assuming the pseudo turbulence resulted from anodic bubbles.The results of CFD simulation for traditional no-hole anodes were compared with the experimental data under similar conditions using particle image velocimetry(PIV).Good agreement was found between the CFD model and PIV measurements,which indicated that the current CFD model could be used to deal with two types of perforated anodes.The electrolyte velocity under perforated anodes could be reduced and the stability of bath flow could be maintained.Perforated anodes could make bath flow more stable.The maximum and average velocity of electrolyte in four-hole anodes were reduced by 9.53% and 12.89%,respectively.The global average bubble fraction in the melts,the local average bubble fraction in anode-cathode distance(ACD)and the thicknesses of bubble layer under the anode with perforated anodes were less than those with no-hole anodes,but the immersion depth of anodic bubbles in electrolyte was almost the same as that in the case of no-hole anodes.Both ACD and cell voltage could be lowered and energy consumption could be reduced.

Key words: aluminum reduction cells, perforated anode, gas-liquid two-phase flow, numerical simulation

关键词: 铝电解槽, 开孔阳极, 气液两相流, 数值模拟

CLC Number:

TF821
TB115

ZHAN Shuiqing, ZHOU Jiemin, LI Mao, DONG Ying, LIU Zhiming, ZHOU Yiwen, YANG Jianhong. Numerical simulation of gas-liquid two-phase flow in aluminum reduction cells with perforated anodes[J]. CIESC Journal, 2013, 64(10): 3612-3619.

詹水清, 周孑民, 李茂, 董英, 刘志明, 周益文, 杨建红. 开孔阳极铝电解槽熔体中气液两相流数值模拟[J]. 化工学报, 2013, 64(10): 3612-3619.

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Numerical simulation of gas-liquid two-phase flow in aluminum reduction cells with perforated anodes

开孔阳极铝电解槽熔体中气液两相流数值模拟

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