Felix Gold Achieves 69% Antimony Concentrate with 85% Recovery

Metallurgical Breakthrough at Treasure Creek

Felix Gold Limited (ASX: FXG) has announced promising metallurgical test results from its Treasure Creek Project in Alaska, confirming the capability to produce high-purity antimony concentrates. Samples from the NW Array and Scrafford prospects yielded concentrates grading up to 69% antimony (Sb), placing the product in a premium category that could meet military-grade specifications.

The test work, conducted by PMC Mineral Services Laboratory in British Columbia, demonstrated recovery rates exceeding 85%, with exceptionally low levels of impurities such as arsenic, lead, cadmium, and bismuth. These results are significant given that typical commercial antimony concentrates range between 40% and 55% Sb, with only a limited fraction surpassing 60% Sb.

Strategic Importance and Market Context

Antimony is classified as a critical mineral by the U.S. government, essential for defense, battery technologies, and flame retardants. Felix Gold’s ability to produce a strategic-grade concentrate domestically aligns with national priorities to secure supply chains and reduce dependence on foreign sources. The Treasure Creek Project benefits from its proximity to Fairbanks, Alaska, providing access to established infrastructure, power, and a skilled workforce, which de-risks potential development.

Market conditions further support Felix Gold’s ambitions, with antimony prices at record highs amid a global supply deficit. The geopolitical landscape and U.S. policy incentives for domestic critical mineral production create a favorable environment for advancing the project.

Pathway to Production

Felix Gold is targeting the commencement of antimony concentrate production by the end of 2025, contingent upon the successful completion of feasibility studies, regulatory approvals, and securing funding. The company has identified a simplified processing flowsheet prioritizing flotation and gravity separation to maximize recovery and grade while minimizing costs and environmental impact.

Ongoing work includes further drilling, metallurgical testing to optimize processing, environmental studies, and community consultation. Market engagement with potential off-take partners is also underway, positioning Felix Gold to capitalize on the growing demand for critical minerals.

Technical and Operational Insights

The metallurgical program revealed that the antimony mineralisation primarily consists of stibnite and stibiconite, with favorable density contrasts facilitating efficient gravity separation. The NW Array prospect showed particularly strong results, with combined gravity and flotation processing achieving 85% recovery and producing a 69% Sb concentrate with low impurities.

Scrafford samples also demonstrated robust upgrading potential, with heavy liquid separation yielding recoveries up to 96.5%. The low arsenic content (below 0.5%) and negligible lead and other contaminants enhance the concentrate’s marketability, especially for sensitive applications.