We get the metals out, and put the carbon in.
Industrial Partners
Unlock new value through critical mineral recovery and carbon removal
Metal recovery and carbon removal testwork, with a report you own. Three lines of business, from the same mine waste:
- Critical metal recovery: to recover the metal left in mine waste, starting with nickel and copper.
- Carbon removal: CO2 from the air, locked in rock for over 10,000 years.
- Upcycled material: we are characterizing treated tailings for reuse.
Arca’s team at a mine site in Australia
Carbon Buyers
Remove carbon for over 10,000 years
- CO₂ is mineralized and locked away permanently
- Removals measured directly on site, with MRV based on established science and third-party verification
- Supply anchored in abundant alkaline feedstocks
- Low resource and land footprint
Stirling Range National Park, Western Australia. Photo by Isaac Borrego.
Technology
Accelerating the natural superpower of rocks
Reactions between rocks and CO₂ have helped shape Earth’s climate for billions of years.
Our breakthrough technology accelerates carbon mineralization and increases the capacity of rocks to absorb and store CO₂.
Gigatonnes of suitable rocks are available in industrial byproducts and ores, representing a multibillion-dollar opportunity.
Grand Canyon - Guano Point, Hualapai Indian Reservation
Deployment
Proven on an operational site
From 2023 to 2025, we ran an 18-month carbon removal demonstration at BHP’s Mt Keith nickel mine in Western Australia. Smart Churning raised the carbon mineralization rate and demonstrated our technologies for real-time monitoring and measurement of carbon flux. Third parties verified the removals.
Rovers from Copperstone are customized with Arca's Smart Churning technologies
