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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Kinetics of electrochemical process of
galena electrode in diethyldithiocarbamate solution
QIN Wen-qing(覃文庆), QIU Guan-zhou(邱冠周),
HU Yue-hua(胡岳华), XU Jing(徐 竞)

Department of Mineral Processing, Central South University,
Changsha 410083, P.R.China

Abstract:The electrode process of galena in diethyldithiocarbamate (DDTC) solution at pH 11.4 has been investigated using cyclic voltammetry, potentiostatic and chronopotentiometry. Electrodeposit of PbD2 on galena electrode surface can occur while the electrode potential is higher than -0.05V. The relationship between the current density caused by diffusion and reaction time has been ascertained, and the diffusion coefficient of DDTC on galena surface in DDTC solution is about 1. 12×10-6 cm2/s. A passive PbD2 film covers the surface of galena electrode.

 

Key words: electrode process; galena; electrochemistry of flotation

ISSN 1672-7029
CN 43-1423/U

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