RE: Is the reversal set up for next week?25 Apr 2025 12:10
Leon made it clear in the investor call that Roan is now only processing the higher grade material, there is nothing else being put through the plant, so, 45,000 tpm @ 1.6% cu gives a maximum possible production of 8,640 tonnes / year from Roan, squeezing every last drop of copper from the rock. Obviously thats unrealistic, the question is what percentage is recoverable?
The DMS circuit, if it performs to spec, is expected to recover about 55% of contained copper so 8640 x 0.55 = 4,752 tonnes / year. The tailings from that process presumably then go to the other circuit which can recover an oxide and a sulphide concentrate. There is also the possibility of heap leaching as well, which hasn't been mentioned but was supposed to be tested at Roan. A 70% overall recovery would be 8640 x 0.7 = 6,048 tonnes / year. If they achieve that or better I would be reasonably happy.
The Munkoyo feed to Sable is somewhere between 5,000 - 8,000 tpm @ > 2% which is somewhere between 1,200 -1,900 tonnes / year or better (depending on grade). The rate is eventually expected to increase to 15,000 tpm.
Grovenor is still in the drilling stage from what Leon said, so not currently shipping anything to Sable but should get going soon. Leon said we should expect a similar timeline as Munkoyo, roughly 6 months from acquisition to starting to ship material... it's been more than 6 months already.
Between Roan and Munkoyo, that should be at or close to Sable's current cathode capacity, Grovenor should be ramping up in time for the second cathode plating tank-house to come into operation later in the year.
Getting the leaching plants up and running at Munkoyo will be another step forward but that will likely take several months to build and get operational.