Abstract:This paper presented a study for leaching kinetic indium from indium-bearing zinc residue in H2SO4 solution. The shrinking core model was applied to the results of experiments investigating the effects of stirrer speed, H2SO4 concentration, ferric ion concentration, leaching temperature and particle size on indium dissolution rate. The activation energy for the leaching process was found to be J/mol. The reaction order with respect to sulfuric acid and ferric ion concentrations were approximately 0.985 and -0.096, respectively. The dissolution of indium from indium-bearing zinc residue in H2SO4 solution was found to be controlled by reaction-controlled process.