Overview
The Assafo-Dibibango Project (ADP) in Côte d’Ivoire features a state-of-the-art gold recovery processing facility designed to handle a varied ore schedule. The plant incorporates crushing, grinding, leaching, and adsorption circuits to maximize gold extraction efficiency while adhering to stringent operational and environmental standards.
Key Process Stages
- ROM Pad: Initial ore reception and storage before primary crushing.
- Crushing Circuit: Two-stage crushing (jaw crusher + cone crusher) to reduce ore size to 80% passing 150mm.
- HPGR & Wet Screening: High-Pressure Grinding Rolls (HPGR) further reduce particle size, followed by wet screening to classify material.
- Grinding & Classification: Ball mill and hydrocyclone circuit achieves target grind size (P80 75µm).
- Leach/Adsorption: Cyanide leaching with carbon-in-pulp (CIP) adsorption for gold recovery.
- Elution & Goldroom: Loaded carbon is processed through an AARL elution circuit to produce doré bars.
- Tailings Treatment: Neutralization and detoxification prior to deposition in the tailings storage facility (TSF).
Critical Data
| Parameter | Value |
|---|---|
| Design Throughput | 3.5 Mtpa |
| Grind Size (P80) | 75µm |
| Leach Retention Time | 24 hours |
| Gold Recovery Rate | 92% (avg.) |
| Power Consumption | 18 MW (peak) |
Design Philosophy
The facility prioritizes modularity, energy efficiency (HPGR for reduced power consumption), and automated control systems to optimize metallurgical performance. Ore variability is managed through blending strategies on the ROM pad.
Based on filing data from 2024-2025.
