Tijirit Project — Technical Report (PEA)
| Company | [To be identified from report header] |
| Date | 2021 |
| Region | Mauritania |
| Commodities | Gold |
| Status | Preliminary Economic Assessment |
Executive Summary
This Technical Report presents the Preliminary Economic Assessment (PEA) for the Tijirit Project in Mauritania. The process plant is designed for two distinct production phases. Phase 1 processes 2,976 tonnes per day of run-of-mine (ROM) material from higher-grade deposits in the Eleonore mining zone, with an average feed grade of 3.33 g/t Au. Phase 2, implemented after approximately four years, expands throughput to 4,500 tpd to process lower-grade material from the Lily and Sophie mining zones at 1.07 g/t Au. The process plant utilizes traditional gravity and Carbon-In-Leach (CIL) circuits, with overall gold recovery ranging from 93.6% to 96.0%. Annual gold production varies between 50,000 oz and 123,000 oz depending on plant feed rate and grade.
The flowsheet includes primary jaw crushing, followed by single-stage SAG milling in Phase 1 (converted to SAB circuit in Phase 2), gravity concentration, CIL leaching, elution, intensive leaching of gravity concentrate, electrowinning, and tailings thickening and filtration. Phase 2 introduces a pebble crusher, ball mill, and additional gravity concentrator to achieve the higher throughput and finer grind size (P80 reduced from 105 to 75 microns). The project employs a dried stacked tailings storage approach with vacuum disc filtration.
Key Parameters
| Parameter | Phase 1 | Phase 2 |
|---|---|---|
| Plant Capacity | 2,976 t/d | 4,500 t/d |
| Feed Grade | 3.33 g/t Au | 1.07 g/t Au |
| Overall Recovery | 96.0% | 93.6% |
| Annual Production | 111,661 oz/y | 52,888 oz/y |
| Target Grind Size (P80) | 105 microns | 75 microns |
Processing Overview
- Crushing: Primary Jaw Crusher (132 kW), open side setting 100mm (Phase 1) / 150mm (Phase 2)
- Grinding: Single Stage SAG (Phase 1) → SAG/Ball Mill (Phase 2), SAG mill 3,300 kW, Ball mill 3,300 kW
- Gravity: Gravity concentrator with intensive leach reactor
- Leaching: Carbon-In-Leach (CIL) – 7 tanks, 48h residence (Phase 1), 30h (Phase 2)
- Elution: AARL type, 3-tonne columns
- Electrowinning: Two cells for pregnant solutions
- Tailings: Thickening (18m high-rate thickener) and vacuum disc filtration
Reports
Website: https://mininghub.com/project-profile?gid=5269
Report Date: 2021
Region: Mauritania
Project Status: Preliminary Economic Assessment
Commodity: Gold
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