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To model the zinc pressure leach, equations have been written that describe the rates of individual reactions taking place, including (a) oxygen mass transfer, (b) ferrous oxidation by dissolved oxygen, and (c) ferric reactions with ZnS and other minerals. In the continuous process, at steady-state, these take place at the same rate, and so the equations can be solved simultaneously. Model calculations using simultaneous equations are shown in graphical form to demonstrate the effect of different variables on the leach performance. |