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    Rocking CO2
    to create new industrial value

    We use industrial waste to turn CO₂ into rock, creating new value for industry and measurable climate impact.

    Industrial Mineralization is a durable carbon removal pathway that benefits industry, buyers, governments and communities.

    Arca’s team on site in Australia Arca’s team on site in Australia

    Industrial Partners

    Improve project economics and valorize industrial byproducts

    We partner with heavy industries which produce alkaline waste streams and byproducts, like mining and steel.​
     
    Our process generates new revenue through high-value carbon credits.
     
    This delivers many potential co-benefits:

    • Geotechnical stabilization
    • Mitigation of hazardous waste
    • Increased metal recovery
    • Marketable byproducts

    Arca’s team on 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
    • Delivery is proven on the ground in operational sites
    • Low resource and land footprint
    Stirling Range National Park, Western Australia Stirling Range National Park, Western Australia

    Stirling Range National Park, Western Australia

    Grand Canyon - Guano Point, Hualapai Indian Reservation Grand Canyon - Guano Point, Hualapai Indian Reservation

    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

    Rovers from Copperstone are customized with Arca's Smart Churning technologies Rovers from Copperstone are customized with Arca's Smart Churning technologies

    Deployment

    Proven on an operational site

    In 2025, Arca completed the world’s first and only carbon removal project using mine waste at an active mine operation. The technologies deployed during this highly successful 18-month demonstration project resulted in a 10x increase in mineralization rate above the baseline. We proved that Arca has the skills to partner seamlessly with heavy industry.

    Rovers from Copperstone are customized with Arca's Smart Churning technologies

    Join a leader with momentum

    The largest commercial agreement for Industrial Mineralization
    In 2025, Arca announced an agreement with Microsoft to deliver nearly 300,000 tonnes of durable carbon removal over the next decade. They join the many buyers who trust us.

    Over a dozen industrial partners
    We have signed MOUs and agreements with mining and steel slag companies to explore mineralization at their sites.

    Carbonated tailings, Clinton Creek mine, Yukon Carbonated tailings, Clinton Creek mine, Yukon

    Carbonated tailings, Clinton Creek mine, Yukon

    • MaRS Logo
    • inBC
    • Natural Resources Canada
    • Microsoft
    • NorthX Climate Tech
    • MaRS Logo
    • inBC
    • Natural Resources Canada
    • Microsoft
    • NorthX Climate Tech
    • MaRS Logo
    • inBC
    • Natural Resources Canada
    • Microsoft
    • NorthX Climate Tech
    • MaRS Logo
    • inBC
    • Natural Resources Canada
    • Microsoft
    • NorthX Climate Tech
    • BHP
    • Chalice
    • Giga Metals
    • 3R Mineral
    • BPI Minerals
    • Tjiwarl Aboriginal Corporation
    • Steel Dynamics
    • WSP
    • Hartree
    • DuGrisAuVert
    • BHP
    • Chalice
    • Giga Metals
    • 3R Mineral
    • BPI Minerals
    • Tjiwarl Aboriginal Corporation
    • Steel Dynamics
    • WSP
    • Hartree
    • DuGrisAuVert
    • BHP
    • Chalice
    • Giga Metals
    • 3R Mineral
    • BPI Minerals
    • Tjiwarl Aboriginal Corporation
    • Steel Dynamics
    • WSP
    • Hartree
    • DuGrisAuVert
    • BHP
    • Chalice
    • Giga Metals
    • 3R Mineral
    • BPI Minerals
    • Tjiwarl Aboriginal Corporation
    • Steel Dynamics
    • WSP
    • Hartree
    • DuGrisAuVert
    Steel factory Steel factory

    Industrial Mineralization is
    the future of industry

    The world has a tough equation to crack:
    Mountains of waste on the ground.
    Gigatonnes of CO₂ in the sky.

    What if two wrongs could make a right?

    Industrial Mineralization (IMin) repurposes industrial waste residues and byproducts into resources.

    IMin valorizes alkaline byproducts such as steel slag, ultramafic mine tailings and waste rock.