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Dissolution kinetics of nickel from lateritic ore in nitric acid solution was investigated. Experimental parameters used were stirring speed(100-600 r/min), temperature(40-96 °C), nitric acid concentration(0.1-2 mol/L) and particle size(<106 μm). The shrinking core model was applied to the results of experiments investigating the effects of leaching temperature in the range of 40-90 °C and nitric acid concentration in range of 0.1-2 mol/L on nickel dissolution rate. The kinetic analysis shows that the nickel dissolution from lateritic ore could be described by diffusion model. The activation energy(E_a) for the dissolution reaction is calculated as 79.52 kJ/mol.
Dissolution kinetics of nickel from lateritic ore in nitric acid solution was investigated. Experimental parameters used were stirring speed (100-600 r / min), temperature (40-96 ° C), nitric acid concentration (0.1-2 mol / L) and particle size (<106 μm). The shrinking core model was applied to the results of experiments investigating the effects of leaching temperature in the range of 40-90 ° C and nitric acid concentration in range of 0.1-2 mol / L on nickel dissolution The kinetic analysis shows that the nickel dissolution from lateritic ore could be described by diffusion model. The activation energy (E_a) for the dissolution reaction was calculated as 79.52 kJ / mol.