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    Perpetua–INL minerals recovery pilot: flowsheet and design insights for mine engineers

    December 10, 2025|

    Reviewed by Tom Sullivan

    Perpetua–INL minerals recovery pilot: flowsheet and design insights for mine engineers

    First reported on International Mining – News

    30 Second Briefing

    Perpetua Resources has signed an agreement with Idaho National Laboratory, operated by Battelle Energy Alliance, to host, commission and run a flexible, modular pilot plant to recover critical and defence-related minerals, including antimony, from Perpetua’s orebodies. The pilot is expected to test flowsheets for selective antimony recovery alongside other strategic elements, using containerised process modules that can be reconfigured for different ore types and chemistries. Outcomes will inform full‑scale processing design for the Stibnite Gold Project and potential US domestic supply chains for military‑grade antimony products.

    Technical Brief

    • Agreement is structured via Battelle Energy Alliance LLC, INL’s managing and operating contractor.
    • INL will be responsible for hosting, commissioning and day-to-day operation of the pilot plant.
    • Scope explicitly targets “various” critical and defence-related minerals beyond antimony from Perpetua’s existing orebodies.

    Our Take

    Antimony appears only in several keyword-matched pieces in our database, so Perpetua Resources’ Idaho work with Idaho National Laboratory positions the US as a rarer North American case of upstream antimony capability compared with the more common gold, copper or lithium stories.

    Perpetua Resources also features in MINING.COM’s November Global Mining Power Rankings coverage, signalling that investors are already tracking its antimony exposure as part of a broader critical minerals narrative rather than as a niche by-product play.

    A US-based antimony recovery project in Idaho has strategic implications for defence supply chains, as most recent antimony coverage in our database still centres on foreign supply risk and processing bottlenecks rather than domestic R&D-led recovery routes.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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