TITLE:
Electrowinning of Copper Using Rotating Cylinder Electrode Utilizing Lead Anode
AUTHORS:
Hesham Soliman, Ahmed Abd El-Moneim
KEYWORDS:
Electrodeposition, Electrowinning, Lead Anode, Rotating Cylinder Electrode (RCE), 1, 2-Dihydroxypropane (12-DHP), Copper Powder
JOURNAL NAME:
Engineering,
Vol.3 No.4,
April
8,
2011
ABSTRACT: The effect of lead anode, rotating cylinder electrode (RCE), amount of 1,2-dihydroxypropane (12-DHP), temperature and rotation on the electrowinning of copper from low concentration acidified copper sulphate solution has been investigated. Copper powder was electrodeposited onto RCE that made of pure copper. From cyclic voltammetry experiments, an empirical parameter called the departure percent, S, was obtained which may represent the stability of the organic additive in the given medium and under the experimental conditions. The inhibition percentage, P, was 0.00 - 89.91% depending on the experimental variables. P was affected by temperature and mole fraction of 12-DHP, while rotation did not show any influence on it. Values of activation energy of electrodeposition process, Ea, were found to be less than 28 kJ mol-1 indicating diffusion controlled process. The overall mass transfer correlations under the present conditions have been computed using the dimensional analysis method. The data were valid for 90