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

In this technical note we have applied the law of additive reaction times for fluid–solid systems (Sohnʹs 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 Sohnʹs Law to model mixed-controlled kinetics and the advantage of using a closed-form solution is realized.