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Abstract
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In this research, copper content of chalcopyrite concentrate was leached in sulfuric
acid-hydrogen peroxide, with isopropanol used to hinder the decomposition of hydrogen
peroxide. More than 90 pct of the copper was leached within 360 minutes using 1.5 mol/L
sulfuric acid, 2 mol/L hydrogen peroxide, and 2 mol/L isopropanol solution at a temperature of
45C. According to the kinetic studies performed via the reduced time plot method, the process
kinetics followed the diffusion-controlled shrinking core model up to a progress of around 70
pct in the leaching process. This model was validated using linear plots of the
diffusion-controlled shrinking core model under different temperatures and particle sizes.
Moreover, the activation energy was computed to be 55 kJ/mol via the Arrhenius plot.
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