| Company | Colt |
| Date | 2013 |
| Region | Portugal (EU) |
| Commodities | Gold |
Executive Summary
This Pre-Feasibility Study (PEA) by SRK Consulting evaluates four processing options for the Boa Fé gold project. The options range from conventional gravity and flotation with cyanidation to alternative lixiviants such as thiosulphate and halogens, largely driven by potential EU restrictions on cyanide usage. Recovery estimates vary significantly, with Options A and B at 85.5%, Option C at 73%, and Option D at 95%.
SRK Consulting expresses significant skepticism regarding the technical feasibility and recovery figures presented by the client (Colt). The report notes that the proposed flowsheets have not been tested at laboratory scale in their precise configurations. Specifically, the recovery figures for Options A and B are at the upper end of reported testwork ranges, and Option C assumes additive recoveries from processes tested in isolation. SRK concludes that a significant program of further testwork is required to verify technical feasibility and confirm recovery figures.
Processing Options
- Option A: Gravity + Flotation concentrate, off-site recovery (Ultrafine grinding + Intensive cyanidation).
- Option B: Gravity + Flotation concentrate, on-site recovery (Ultrafine grinding + Intensive cyanidation).
- Option C: Heap leaching using thiosulphate after gravity recovery.
- Option D: Leaching using a halogen lixiviant.
Reports
- entities/Boa_Fe_Mine
Website: https://www.investing.com/equities/colt-resources-inc-company-profile
Report Date: 2013
Region: Portugal (EU)
Project Status:
Commodity: Gold
Throughput:
Mine Life:
Mine Type:
Ore type:
