电解铝液中Al_2O_3夹杂物的形成机理  

Formation mechanism of Al_2O_3 inclusion in electrolytic liquid-Al

作　　者：贺永东[1] 张新明[1] 陈明安[1] 

机构地区：[1]中南大学材料科学与工程学院

出　　处：《中国有色金属学报》2007年第12期2046-2053,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家重大基础研究发展规划资助项目(2005CB623706)

摘　　要：介绍铝电解机制对电解铝液中形成Al2O3夹杂物的影响,分析铝液中Al2O3夹杂物形成的机理,推算CO2对铝液扩散的质量传递方程,描述效应处理过程对铝液中Al2O3夹杂物形成过程的影响。利用Person—Waddington电流效率模型测算电解铝液中可能形成的Al2O3夹杂物最大值。结果表明:电解过程生成的Al2O3夹杂物对铝液的污染,是短流程工艺影响铝熔体冶金质量的主要根源。The effect of mechanism of Al electrolyte on the formation of Al2O3 inclusion in electrolytic liquid-Al was introduced. The mechanism of formation of dioxide inclusions in liquid-Al was analyzed. A mass transporting equation of CO2 diffusion into liquid-Al was proposed. The formation of Al2O3 inclusion during manipulating anode effect was described. With Person-Waddington model, the probable maximum dioxide inclusions in electrolytic liquid-Al was quantitative measured. It is suggested that the alumina contained in the electrolytic liquid-Al is the main source of debasing metallurgical quantity.

关 键 词：电解铝液 Al2O3夹杂物 CO2 阳极效应 冶金遗传 

分 类 号：TG290[金属学及工艺—铸造] TF803.25[冶金工程—有色金属冶金]