@PASBOZ, I posted on this issue a while ago.
Some METs I saw suggested greater than 75% recovery but recovery depends on level of concentrate produced, but I am not sure how the historical METs transform to the current proposal. A bit more information on tin, in these two embedded posts.
Post #:43553026
Post #:40024479
A table from a previous 2019 study which comes from one of the above embedded posts.
All IMO
Running discussion on SP, page-48060
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