Thanks ans25- I like the coffee machine analogy regarding the...

Thanks ans25- I like the coffee machine analogy regarding the lower pressure but not particularly helpful with my question.

It doesn't explain to me how they can get around the autoclave which seems to be the bottleneck for the laterite plants? They will still need to operate at higher than atmospheric pressure?

Also never really got my question answered re sulphuric acid consumption given the fact that carbonates/dolomite react with sulphuric acid.
Dolomite Ore Formation (DOF) is a carbon rich, marly dolomitic horizon in a sequence of clastic and carbonate lithologies in the upper Ombombo Subgroup.

Also another question - where are successful sulphide leaches operated on a large scale? And what were their CAPEX costs?