Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 14    No. 3    June 2004

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Anodic reaction kinetics of electrowinning zinc in
system of Zn(Ⅱ)-NH3-NH4Cl-H2O
YANG Sheng-hai(杨声海), TANG Mo-tang(唐谟堂),
CHEN Yi-feng(陈艺锋), TANG Chao-bo(唐朝波), HE Jing(何 静)

College of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China

Abstract:The anodic reaction kinetics of zinc electrowinning was investigated on the titanium base RuO2anode in the system of Zn(Ⅱ)-NH3-NH4Cl-H2O. The effects of stirring speed, ammonium chloride concentration and temperature on anodic reaction rate were studied through the curve measurement of potentiostatic polarization. The results reveal that the electrochemically controlled anodic reaction obeys Tafel equation and the anodic reaction order for ammonium chloride is 1.
056, with the apparent activation energy of 40.17 kJ/mol. The general equation of anodic reaction kinetics was obtained.


Key words: zinc electrowinning; anodic reaction; kinetics; Ti-RuO2anode

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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