Application of additive-reaction-times law to the mixed-control kinetics of oxygen leaching of chalcopyrite

• Sohn's Law of additive reaction times applied to chalcopyrite leaching data
• Good agreement between model and data over a large range of conditions
• Closed-form solution offers simple approximation to model multiparticle systems.

In this technical note we have applied the law of additive reaction times for fluid–solid systems (Sohn's Law) to the experimental data of oxygen leaching of chalcopyrite from ore fragments. Good agreement between the applied model and experimental data for a wide range of operating conditions examined in this study is observed. Possible reasons for the deviation of the mode to experimental data are also discussed. The results of this study demonstrate the application of Sohn's Law to model mixed-controlled kinetics and the advantage of using a closed-form solution is realized.