| Company | Petaquilla Mines |
| Date | May 2012 |
| Region | Panama |
| Commodities | Gold, Silver |
Executive Summary
This NI 43-101 Technical Report excerpt details the recovery methods for the Molejón project, focusing on heap leaching for low-grade oxide ore and processing for sulfide ore. The process involves crushing ore to specific particle sizes, agglomerating with cement and lime to maintain permeability, and stacking on a double-lined heap leach pad. Pregnant solution is treated via carbon adsorption, stripping, and electrowinning to produce doré metal.
The heap leach pad design utilizes a double-lined system for environmental integrity, with solution distribution managed via feeder pipes or latex tubing to prevent scaling. Cyanide solution is recycled through the agglomeration and leaching circuits, maintaining a pH of 10.5 to 11.0. The carbon adsorption system includes acid washing, regeneration kilns, and electrowinning cells to recover gold and silver from the solution.
Operational parameters include specific crush sizes for oxide (80% passing 3 inches) and sulfide (80% passing 3/8 inch) ore. Agglomeration requires 2 kg/t of Portland cement and 4 kg/t of lime. The process ensures solution flow through the heap to maximize extraction rates and prevent ponding.
Reports
- entities/Molejon_Mine
Website: https://www.mining-technology.com/projects/molejon-gold/
Report Date: May 2012
Region: Panama
Project Status:
Commodity: Gold, Silver
Throughput:
Mine Life:
Mine Type:
Ore type:
