AbstractDissolution kinetics of an oxidized copper ore (mainly malachite) in water saturated by Cl2has been studied. The effect of particle size, flow rate of the gas, temperature and solid‐liquid ratio has been determined. The dissolution rate increased with decrease in particle size and solid‐liquid ratio and with increase in the gas flow rate and temperature. It has been found that the dissolution proceeds in two stages and is controlled by diffusion through the ash layer in each stage. The activation energies for the first and second stage are 27.15 and 20.21 kJ mol−1, respect
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