US $162M mining waste-to-minerals push: technical takeaways for operators
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
The US Department of Energy has earmarked up to $162 million for nine projects to recover scandium, copper, antimony and rare earth elements from mine tailings, abandoned copper mines, industrial byproducts and existing aluminium facilities, moving technologies from bench and pilot scale towards commercial demonstration. Selected recipients include Felix Gold’s Treasure Creek project near Fairbanks, targeting high-grade, near-surface antimony using existing mining infrastructure, and MIT spinout SiTration, which is developing copper and critical mineral recovery from diluted waste streams at operating sites. For operators, the programme signals growing technical and regulatory support for reprocessing legacy tailings and industrial residues as strategic feedstocks.
Technical Brief
- DOE’s selection covers nine discrete projects, with a combined potential allocation of $162 million.
- Felix Gold’s Treasure Creek near Fairbanks targets high-grade, near-surface antimony using existing mine infrastructure.
- SiTration’s MIT-derived process focuses on copper and other critical metals in diluted waste streams at operating mines.
- Other projects explicitly target old tailings, abandoned copper mines and existing aluminium facilities as feedstocks.
Our Take
The $162M waste-to-critical-minerals push sits alongside at least $75M of earlier DOE funding for coal-based rare earth recovery and a separate $65.5M call for stranded oil and gas valorisation, signalling that the Department of Energy is building a portfolio of unconventional feedstock programmes rather than backing a single pathway.
With a statutory deadline of 1 January 2027 for US defence manufacturers to cut reliance on Chinese-origin magnets, projects in this round that target rare earth elements, cobalt and nickel from tailings or coal waste are likely to find early offtake opportunities in defence and high-end manufacturing supply chains.
Alcoa and BHP-linked entities appear repeatedly across recent DOE-backed critical minerals and process-innovation items in our database, suggesting that large incumbents are positioning themselves as technology partners or testbeds for circular recovery of aluminium, copper and associated by-product streams.
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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