Prediction of Precious Metal Heap Leach Behavior by Use of Unsteady State Models.
Dixon-DG; Hendrix-JL; Nelson-JH
Paper in World Gold '91 SME and Australian Inst Min and Metall PP 201-212 :201-212
A model based on non-steady state has been developed for dissolution and diffusion in porous ore particles. Results from the particular model have been incorporated, as a rate term, into a global, heap- scale model based on a plug flow reactor at unsteady state. The global model can be used to consider leaching by aqueous-phase reagents in equilibrium with a gas-phase component, such as oxygen gas, as well as strictly aqueous-phase reagents, such as cyanide. The flexibility of the model even allows prediction of the outcomes of using reagent sideflow injection in large heaps. Data from column leaching tests are compared to the model, and their relationship is discussed.
OP; Final Contract Report;
Paper in World Gold '91. SME and Australian Inst. Min. and Metall., PP. 201-212