Fine grinding will be needed again as fine grinding was needed to separate lead and zinc and produce saleable concentrates in the first place. What is left In the tailings dam should be more complex compared to the original feed plus all the pre float shyte is there too.
Check the HRR presentation, there is a slide showing circuit for tailings retreatement, similar mineralisation, lots of grinding.
Lead grade is stuff all in tailings.
They need a strong zinc price plus further exploration success imo.
Fine grinding will be needed again as fine grinding was needed...
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