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Current Efficiency, Corrosion and Structural Changes in SnO2-Sb2O3-CuO Inert Anodes for Aluminium Electrolysis
Ana-Maria Popescu,Virgil Constantin*
Author NameAffiliationE-mail
Ana-Maria Popescu Ilie Murgulescu Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021, Bucharest, Romania  
Virgil Constantin* Ilie Murgulescu Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021, Bucharest, Romania virgilconstantin@yahoo.com 
Abstract:
A systematic study was conducted on current efficiency (CE), corrosion and structural changes in SnO2-based inert anodes (made of 96wt%SnO2+2wt%Sb2O3+2wt%CuO) on a laboratory Hall-Heroult aluminium cell. The influence of operating parameters and elec-trolyte composition on the CE and corrosion process were evaluated. The CE was found to be more than 90% and catastrophic corrosion took place at low percent of Al2O3, high percent of LiF, low cryolite ratio and high current densities. From all the structural changes that took place in the SnO2-based inert anodes, we assumed that the most important contri-bution was due to the migration of CuO towards the outer limits of the constituent grains of SnO2 based ceramic. The complex process occurred during the formation of various phases and their sintering ability both directly depended on Cu/Sb molar ratio.
Key words:  Inert anode, Aluminium electrowinning, Current efficiency
FundProject:
铝电解中SnO2+Sb2O3+CuO惰性阳极的电流效率、腐蚀性及结构变化
Ana-Maria Popescu,Virgil Constantin*
摘要:
系统研究了霍尔赫鲁特铝电解池中SnO2基惰性阳极 (96%SnO2+2%Sb2O3+2%CuO)的电流效率,腐蚀性以及结构变化. 评价了各种操作参数(温度、电流密度、阴阳两级的距离、冰晶石量比、Al2O3 浓度和电解质组成)对电流效率和腐蚀性的影响.
关键词:  惰性阳极,铝电解,电流效率
DOI:10.1063/1674-0068/27/03/368-372
分类号: