CFD simulation of effect of anode configuration on gas–liquid flow and alumina transport process in an aluminum reduction cell

作     者：詹水清 李茂 周孑民 杨建红 周益文 ZHAN Shui-qing;LI Mao;ZHOU Jie-min;YANG Jian-hong;ZHOU Yi-wen

作者机构：School of Energy Science and Engineering Central South University Zhengzhou Research Institute Aluminum Corporation of China Ltd. 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2015年第22卷第7期

页      面：2482-2492页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：Project(2010AA065201)supported by the High Technology Research and Development Program of China Project(2013zzts038)supported by the Fundamental Research Funds for the Central Universities of China Project(ZB2011CBBCe1)supported by the Major Program for Aluminum Corporation of China Limited,China 

主　　题：aluminum reduction cell anode configuration gas–liquid flow alumina transport process simulation alumina content distribution 

摘      要：Numerical simulations of gas–liquid two-phase flow and alumina transport process in an aluminum reduction cell were conducted to investigate the effects of anode configurations on the bath flow, gas volume fraction and alumina content distributions. An Euler–Euler two-fluid model was employed coupled with a species transport equation for alumina content. Three different anode configurations such as anode without a slot, anode with a longitudinal slot and anode with a transversal slot were studied in the simulation. The simulation results clearly show that the slots can reduce the bath velocity and promote the releasing of the anode gas, but can not contribute to the uniformity of the alumina content. Comparisons of the effects between the longitudinal and transversal slots indicate that the longitudinal slot is better in terms of gas–liquid flow but is disadvantageous for alumina mixing and transport process due to a decrease of anode gas under the anode bottom surface. It is demonstrated from the simulations that the mixing and transfer characteristics of alumina are controlled to great extent by the anode gas forces while the electromagnetic forces(EMFs) play the second role.