RE: Roan broken21 Feb 2026 12:37
First you have to understand how Roan was supposed to be operating and how it is currently operating. Roan is comprised of two circuits;
1. the original crushing / milling and floatation / de-watering circuit, and
2. the new DMS "front end" circuit.
The capacity of the milling and floatation circuit is ~70,000 tpm throughput but this depends on the type of material being processed. As I understand it, this is primarily designed to process sulphide rich ores but also has a separate oxide extraction circuit.
The capacity of the DMS is (theoretically) 50,000 tpm and it was designed to process predominantly oxide rich ores.
Currently the DMS is not being used for reasons which have not been made clear, my own thought is that either the circuit was damaged due to some reason, maybe a power outage, or it has been taken offline in order to upgrade it in some way.
That means they are having to process oxide rich ores through the milling and floatation circuit which is not optimal, and probably why they have had to expand the dewatering circuit.
The only way they could possibly achieve the stated theoretical capacity of 13,000 tonnes would be to have the oxide rich feed going to the DMS circuit and another sulphide rich feed going to the milling and floatation circuit. That means running the two circuits in parallel rather than in series. Will that happen at some point? Who knows.