Engineering Theory of Leaching

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Major Process Variables (cont’d)• Time:– while a small-scale batch operation can bemanaged to have a residence time distributionthat is theoretically tractable, commercial-scalecontinuous operations may be more complex, andnot subject to theoretical modeling– this area of uncertainty must be dealt with incommercial reactor sizing from small-scale batchdata– measured in terms of residence time distributions6
Moving Forward• A procedure that can be used to scale up laboratoryresults to predict commercial performance withoutdetailed knowledge of the heterogeneous kineticreaction rates and their dependence on processvariables7
Page 1 and 2: Engineering Theory of LeachingAn ap
Page 3 and 4: Scale-up• we have to be able to a
Page 5: Major Process Variables (cont’d)
Page 9 and 10: 9Generic RTD curve
Page 11 and 12: 11Dispersed Plug Flow Model
Page 13 and 14: Tracer Tests• Can determine RTD f
Page 15 and 16: Step Input Tracer Test• Requires
Page 17 and 18: Fluid Behaviour andBatch Reactor Ki
Page 19 and 20: Macrofluid Behaviour andCSTR Kineti
Page 21 and 22: Leaching Particle Batch/ContinuousK
Page 23 and 24: With Correspondence inKinetics Esta
Page 25 and 26: Utility of Method• This approach
Page 27: Example batch-to-continuouscalculat
Page 30: 30Batch oxidation results at 185 o
Page 34 and 35: 34To normalize, all the zinc concen
Page 38: 38In the final columns, we form the

Engineering Theory of Leaching

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