大型铝电解槽电流效率数值建模研究  

Numerical Modeling of Current Efficiency in Large-scale Aluminum Reduction Cells

作　　者：邱泽晶 张红亮[2] 徐宇杰[2] 王振宇 

机构地区：[1]南瑞(武汉)电气设备与工程能效测评中心,武汉430074 [2]中南大学冶金与环境学院,长沙410083

出　　处：《有色金属（冶炼部分）》2015年第3期23-29,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金青年科学基金资助项目(51104187);国家自然科学基金面上项目(51274241);国家自然科学基金创新群体资助项目(61321003)

摘　　要：对铝电解槽内电流损失机理和现代大型槽(>400kA)的强湍流特征进行剖析,采用界面更新理论描述铝液—电解质界面附近的传质行为,建立了电流损失计算方程、质量传递系数方程及电流效率全域计算方程,进而结合多相流体力学及熔盐电化学相关理论,在CFX平台上建立了关联熔体运动的大型铝电解槽电流效率全域数值计算模型。应用该模型对某400kA级大型铝电解槽的电流效率进行了瞬态实时计算,求得全槽时均电流效率约为92.57%。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%.

关 键 词：铝电解槽 电流效率 数值模拟 多相流 

分 类 号：TF821[冶金工程—有色金属冶金]