电解工艺对电解铝液质量的影响研究(下)  

Discussion of mechanism of the formation of hydrogen and dioxide inclusion and getting rid of impurities itself in electrolyte liquid-Al(B)

作　　者：贺永东[1] 张新明[1] 

机构地区：[1]中南大学材料科学与工程学院

出　　处：《轻金属》2008年第4期26-33,共8页Light Metals

基　　金：国家重大基础研究发展规划项目(2005CB623706)资助

摘　　要：简介了铝电解机制对电解铝液中氢和Al2O3夹杂形成过程的影响,分析了铝液中Al2O3夹杂形成的机理,推算了CO2对铝液扩散的质量传递方程,描述了效应处理期间铝液中氢和Al2O3夹杂的形成过程。利用Person-Waddington模型测算了铝液中可能形成的Al2O3夹杂最大值。电解液中的水分被电解成氢和氧,阴极析出的氢通过扩散和杂-气寄生机制进入铝液,是电解铝液中氢的主要来源。铝电解工艺对电解铝液具有一定的自净化作用。Characteristics of mechanism of aluminittm electrolyte and effect of formation of hydrogen and dioxide inclusions in liquid- Al are elucidated in electrolysis aluminum calls . The mechanism of formation of oxide in liquid - Al is analyzed. A mass transporting equation of diffusion of C02 into liquid - Al is proposed. The formation of hydrogen and inclusion in liquid - Al when manipulating anode effect is described, With the model of Person - Waddington, the probable maximism of oxide inclusions is quantitative analyzed. Water in the electrolyte was electrolyzed into hydrogen and oxygen, and hydrogen separated out on the cathode entered into liquid- Al by diffusing and autoecious in alumina mechanism, which is the main source of hydrogen in the Al electrolyte. Aluminum electrolyte techniques has definite effect of purification on electrolyte liquid - Al.

关 键 词：电解铅液 Al2O3夹杂物 氢 CO2 阳极效应 水解 净化 冶金遗传 

分 类 号：TF821[冶金工程—有色金属冶金]