Freeman Gold extracts up to 97.4% Au at Lemhi

Executive Summary

• Freeman Gold Corp. completed its 2025 Phase 4 metallurgical testwork for the Lemhi gold project in Idaho, confirming high gold recovery rates and a simple, low-risk processing flowsheet.
• The tests, conducted by Base Met Labs and reviewed by Ausenco Engineering, utilized 27 samples including variability, production, and reverse circulation composites from the Main pit, Beauty zone, and SW zone.
• Results indicate an average gold leach extraction of 95.4%, fast leach kinetics (substantially complete within 24 hours), and soft ore characteristics suitable for low-cost conventional milling.

Key Details

• Gold Recovery: Total gold leach extraction ranged from 91.2% to 97.4%, averaging 95.4% across 2025 variability and composite samples.
• Processing Flowsheet: Simple, conventional flowsheet based on 120-micrometre P80 primary grind and standard Carbon In Leach (CIL) cyanidation.
• Leach Kinetics: Leach extraction is substantially complete within 24 hours.
• Reagent Consumption:
  • Average Sodium Cyanide (NaCN) consumption: 1.28 kg/t.
  • Average Lime consumption: 1.01 kg/t.
• Ore Characteristics:
  • Bond Ball Mill Work Index averaged 16.4 kWh/t.
  • SMC tests on 11 drill core samples returned an average Axb value of 138, indicating soft, non-competent ore favorable for SAG breakage.
  • Abrasion index tests averaged 0.13 grams, supporting low-cost conventional milling.
• Cyanide Destruction: SO2/air process successfully reduced CNWAD from ~1,270 ppm to below 5 ppm, meeting typical discharge criteria.
• Sample Composition: The program included 18 drill-core variability composites from the Main pit (including later-year production samples), one composite each from the Beauty and SW zones, three production composites (early, mid, late mine life), and five reverse circulation (RC) samples from the central core of the Main pit.
• Next Steps: Integration of 2025 data into engineering and mine planning; further optimization including confirmatory intensive leach testing and reagent consumption modelling is planned.

Notable Quotes

• "These metallurgical results reinforce Lemhi's potential as a high-quality, free-milling gold project with excellent recoveries and a simple, low-risk processing flowsheet," stated Bassam Moubarak, chief executive officer and director of Freeman. "The combination of high gold extraction, moderate reagent use and soft ore characteristics provides a strong foundation for future development and underscores the project's economic robustness."