RE: What is your preferred strategy?29 May 2022 00:20
@ID78 I think the main issue is ramping up the production from the underground and open pit to feed the plant. Details taken from Q1 Operations report and my thoughts:
Mine Output: Q1 from underground and open pit
> To CIL/Tailings plant = 44.8kt @2.5g/t or average circa 15kt/month
> To Heap Leach = 22.7kt @1.72g/t or average circa 7.5kt/month ... was probably stockpiled for Q2 use
Current Processing Capacity:
> CIL/Tailings = 15kt/month @90% recovery (80% CIL then 52% of remaining 20% gold=90%)
> Heap Leach = 20kt/month @52% recovery (estimate rising to minimum 60% as HL optimised)
So Q1 mine production provided:
> 100% of CIL/Tailings plant current (Q2) 15kt/month OR 50% of upgraded 30kt/month capacity
> 38% of Heap Leach plant current (Q2) 20kt/month OR 6% of upgraded 120kt/month capacity
Yes they need to upgrade the CIL/Tailings plant and boost efficiency but they REALLY need to boost mine production !
Bottom line is that CIL>Tailings process plant looks like it is currently running at 100% capacity until the new ball mill and additional CIL tanks are added, whereas the lower grade ore output will need to be tripled in Q2 to fully utilise the 4 new 5kt pads giving 20ktpm HL capacity as confirmed by Robbie on IG interview.
Current Process plant potential output = 1,745oz/month max
> CIL/Tailings = 15kt/month @90% recovery @2.5g/t = 1,085oz/month ... existing plant (Jan-22 was circa 1koz)
> Heap Leach = 20kt/month @60% recovery @1.72g/t = 665oz/month ... newly built plant being commissioned
Planned Process plant potential output = +4,410oz/month max additional output
> CIL/Tailings = +15kt/month @90% recovery @2.5g/t = 1,085oz/month ... extra plant capacity post upgrades
> Heap Leach = +100kt/month @60% recovery @1.72g/t = 3,325oz/month ... yet to be announced & built
Once complete this will be one serious operation with only modest upgrades needed to make 2koz/month but capable of producing over 6koz/month or 72koz/annum . Note: Once the Heap Leach is fully commissioned the %recoveries should go up to 60-70%.
You have to admire their ambition and as they scale up mine/plant output the AISC will drop and FCF will be huge BUT the biggest challenge will be scaling up mine production to feed this monster !
ATB APR