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Vol.38, No.1, 187 ~ 193, 2000
Title
Pesearch Paper / Hydrometallurgy : The Leaching Behavior of Copper from Cu/Fe Couples in Ammonia Solutions
박인수In Su Park,이응조Eung Cho Lee
Abstract
The leaching behavior of copper from copper/iron couples in ammonia solutions was investigated using a rotating disc. The effect of oxygen potential, rotation speed, temperature and lixiviant concentrations on the dissolution kinetics of copper has been studied. The dissolution rate of copper was reduced at relatively low oxygen potentials due to galvanic effect. On the other hand, when hydrogen peroxide was added in the ammonia solutions, the galvanic effect of the dissolution rate was diminished. The dissolution rate of copper under the conditions studied was found to be controlled by mass transfer of reactants and products through the diffusion boundary layer.
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