Numerical simulation of gas-liquid two-phase flow in zinc electrowinning

被引：0

作者：

Zhou, Ping ^{[1
]}

Li, Hao-Lan ^{[1
]}

Wei, Wen-Wu ^{[2
]}

Su, Yin-Biao ^{[1
]}

机构：

[1] School of Energy Science & Engineering, Central South University, Changsha

[2] Zhuzhou Smelter Group Company, Changsha

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2015年 / 36卷 / 08期

关键词：

Bubble; Flow field; Gas-liquid flow; Numerical simulation; Zinc electrowinning;

D O I：

10.3969/j.issn.1005-3026.2015.08.016

中图分类号：

学科分类号：

摘要：

The gas-liquid two-phase flows in zinc electrolytic cells with single plate and multiple plates were respectively numerically simulated with the commercial software of FLUENT. Based on the mechanism of the generation and movement of oxygen bubbles, the rising velocity of a single bubble was calculated. The results indicate that the rising velocity is 0.017 m/s. With the effect of bubbles from the anode, the electrolyte near the anode flows upward and oppositely flows downward near the cathodes, forming a large recirculation zone in the cell. The average velocity of bubble cluster is 0.021 m/s, which is consistent with the experimental data from the literature. In practical operation, with the joint action of the differential pressure and the bubble drag force, the recirculation of electrolyte flow can be enhanced remarkably. The average velocity of interelectrode fluid is 1.5 times higher than that under the bubble-free condition. This phenomenon indicates that the bubble movement can promote the refreshing of zinc electrolyte and restrain the dilution of zinc ions. ©, 2015, Northeastern University. All right reserved.

引用

页码：1136 / 1140

页数：4

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