Turn steel by-products into business value

Steel production generates significant volumes of oxidised by-products such as mill scale and filter dust. These materials contain valuable metals yet are often processed using fossil-based methods or treated as waste, resulting in lost value and unnecessary emissions.

GreenIron enables steelmakers to recover up to 90% of the metal value in these residuals by transforming them into circular feedstock that can be returned directly into steel production. This improves yield, reduces dependence on virgin raw materials and significantly lowers emissions.

Designed for industrial scale and local deployment, GreenIron’s solution integrates seamlessly into existing operations and is delivered through an attractive, reduction-as-a-service model that provides measurable economic and sustainability benefits.

The Challenge

Today, steel industry residuals are commonly:

  • Processed using fossil-based reduction methods
  • Landfilled or downcycled into low-value applications
  • Transported long distances to centralised treatment facilities
  • Resulting in lost metal value, high CO₂ emissions and costs

At the same time, steelmakers face increasing pressure to:

  • Improve material efficiency and yield
  • Lower dependency on virgin raw materials and scrap
  • Reduce CO₂ emissions
  • Meet stricter regulatory and customer requirements

The GreenIron solution: Reduction-as-a-Service

GreenIron offers reduction and recycling as a service, converting steelmaking residuals into circular, carbon-neutral metal feedstock using hydrogen instead of fossil fuels.

The recycled metal can be reintroduced directly into steel production, closing the material loop.

What this means for Steelmakers

Circular value creation

  • Recover 90% of the metal value from steelmaking by-products
  • Turn residuals from a cost into a valuable resource
  • Reduce dependence on virgin raw materials and scrap

Lower emissions

  • Achieve up to 90% CO₂ reduction compared to fossil-based reduction methods
  • Support decarbonisation targets and customer sustainability requirements

Operational simplicity

  • GreenIron owns and operates the reduction facility
  • No customer capex required
  • Seamless integration with existing steelmaking processes

Attractive Economics

GreenIron’s solution is designed to be commercially attractive from day one:

  • Competitive cost compared to fossil-based alternatives
  • Low operating costs enabled by energy-efficient, solid-state processing
  • Modular, scalable furnaces with a small footprint
  • Reduced logistics costs through local deployment

Materials we process:

Near-term focus

  • Mill scale
  • Filter dust

Future potential

The technology is designed to handle a wide range of metal oxides and industrial by-products, enabling expansion into additional high-value metal segments and technology licensing over time.