After re-reading the Hod Maden PFS and consulting others, I need to point out an error in my analysis with regard to this statement:
"EVEN if they recover 77% of the gold, nearly HALF of that may not be marketable and the pyrite cleaner circuit may be removed!"
Gold recovery is in fact 77% in bulk flotation after fine regrinding (30μm). All of which report to the copper concentrate. However, gold recovery is 39% in bulk flotation (open circuit) after primary grinding. Below is the cost curve for various grind sizes:
My 85% Cu recovery and 50% Au recovery is still a standard assumption for primary grinding/re-grinding. My thesis remains the same with regard to Rupice - that the cost/benefit trade-off favors a flow sheet incorporating primary grinding/re-grinding to minimize CapEx/OpEx, as the marginal gold recovery will have minimal impact on cash flows. Incorporating fine grinding and/or leaching the tails would have a negative impact on the Net Present Value.
Here are operating metrics at Hod Maden. Assuming underground mining, Rupice should have higher mining costs (ramp, room and pillar vs. cheap long-hole stoping at Hod Maden) but offset by much lower ore processing costs due to energy savings (Again, refer to the energy cost curve above):
The above noted, I've always assumed the high end of the OpEx range at ~US$80/t for underground mining (vs. $66.5/t at Hod Maden) in efforts to keep my models conservative.
Hope this was helpful to all!
- Forums
- ASX - By Stock
- ADT
- Ann: Adriatic Metals Corporate Presentation
Ann: Adriatic Metals Corporate Presentation, page-148
-
-
- There are more pages in this discussion • 179 more messages in this thread...
You’re viewing a single post only. To view the entire thread just sign in or Join Now (FREE)
Featured News
Add ADT (ASX) to my watchlist
(20min delay)
|
|||||
Last
$3.48 |
Change
-0.010(0.29%) |
Mkt cap ! $974.1M |
Open | High | Low | Value | Volume |
$3.49 | $3.53 | $3.47 | $1.583M | 453.4K |
Buyers (Bids)
No. | Vol. | Price($) |
---|---|---|
1 | 2000 | $3.47 |
Sellers (Offers)
Price($) | Vol. | No. |
---|---|---|
$3.51 | 413 | 1 |
View Market Depth
No. | Vol. | Price($) |
---|---|---|
1 | 2000 | 3.470 |
2 | 5413 | 3.450 |
1 | 413 | 3.440 |
1 | 413 | 3.430 |
1 | 422 | 3.420 |
Price($) | Vol. | No. |
---|---|---|
3.510 | 413 | 1 |
3.520 | 413 | 1 |
3.530 | 413 | 1 |
3.540 | 422 | 1 |
3.550 | 8422 | 2 |
Last trade - 16.10pm 04/10/2024 (20 minute delay) ? |
Featured News
ADT (ASX) Chart |