Resouro Strategic Metals Inc. (RSGOF) Metallurgical Testwork & PEA Update - Tiros Project
Executive Summary
- Resouro reported successful metallurgical test results showing high TREO extraction (88.8%‑95.2%) and strong TiO₂ recovery (71.2%‑94.2%) on fine‑particle flowsheets, and promising concentrate grades on coarse‑particle flowsheets.
- Ongoing work aims to cut sulphuric acid consumption (currently 700–1,320 kg/t raw sample) through beneficiation, magnetic separation, flotation, and potential on‑site acid production.
- The PEA is being refined; key milestones such as mine planning, environmental permitting, and market studies are largely complete, but final processing cost inputs await the outcome of the metallurgical optimisation.
Key Details
- Metallurgical Testwork – Fine Particle (<20 µm) Flow Sheet (Sulphuric Acid Leach):
- TREO stage extraction: 88.8%‑95.2%
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TiO₂ stage recovery: 71.2%‑94.2%
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Metallurgical Testwork – Coarse Particle (>75 µm) Conventional Flow Sheet:
- TiO₂ concentrate grade: 76.8%
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TiO₂ stage recovery from coarse feed: 39%
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Sulphuric Acid Consumption:
- Preliminary range: 700‑1,320 kg/t (raw sample minus 20 µm fraction)
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Adjusted to raw sample basis (accounting for 56% of weight in <20 µm fraction): 392‑739 kg/t
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Beneficiation Targets:
- Reduce iron oxides and alumina (≈54% of <20 µm feed) that consume acid.
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Magnetic separation, flotation, and other beneficiation steps under evaluation to improve feed quality and lower acid use.
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Optimization Activities Underway:
- Magnetic & electro‑static separation trials – early results encouraging.
- Flotation for gangue removal.
- Reductive calcination and acid bake condition optimisation.
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Acid regeneration, recycling studies, and feasibility of on‑site sulphuric acid production leveraging Brazil’s abundant sulfur resources.
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PEA Status:
- Initial mine planning substantially completed; pending final processing cost inputs.
- Environmental Impact Assessment (EIA) and permitting processes progressing.
- Infrastructure, plant capital, and operating costs to be finalized after beneficiation optimisation.
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Independent TiO₂ & rare‑earth market study received; update forthcoming post‑beneficiation.
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Strategic Decision: Consider placing the PEA on hold until metallurgical optimisation is complete to ensure economic robustness.
Notable Quotes
“Resouro is well advanced in testing a conventional process flowsheet for recovery of titanium dioxide to concentrate and high leach extractions of rare earth elements. The latest metallurgical testwork results provide increasing confidence that the Tiros Project has the potential to be developed into a globally significant regolith (highly weathered soft rock) type titanium and rare earths project.” – Christopher Eager, CEO