Locky, don't know what they refer to with pickle (typically a...

Locky, don't know what they refer to with pickle (typically a acid solution + salt). From my research acid only doesn't work, needs to be in a reductive environment hence addition of a reducing agent, common ones are sucrose, glucoe, corncob, molasses, sawdust, waste tea, oxalic acid, H2O2 and SO2.

as said before, I would have like to have seen more optimisation graphs, based on acid conc, reagent concentration, ground size, ORP, and temperature.
perhaps was done but not presented.

flyer got a good point, the graph shown is for results at 90C. We won't operate at this temperature. However we do have an exothermic reaction here and T will rise, so I will give benefit of the doubt, but reaction kinetics are highly dependent on T. I have seen other projects with 60C and similar leaching recoveries so this doesn't bother me much.

were these optimisation tests done at Csiro? Equipment looks run down... hahaha. Time to buy new gear...

I love the graph below re the leaching process





I think is about time E25 engages me to design the announcement slides so I add add some pepper to them.