Elkem low-CO2 slag recycling accelerates circular materials

Elkem

Elkem low-CO2 slag recycling gained momentum with a NOK 32.8mn grant. The Elkem low-CO2 slag recycling program will convert FeSi slag and secondary silicon into cement alternatives. As a result, Elkem low-CO2 slag recycling targets deep cuts in construction material emissions.

Turning FeSi slag into cement alternatives

Elkem will develop cement alternatives from ferro-silicon slag at its EAF sites. The company targets a CO2 footprint under one-third of standard cement. Testing will run at the Kristiansand facilities acquired in 2024. The materials will serve construction and automotive supply chains. Innovation Norway’s Environmental Technology Scheme funds the project.

Scaling circularity with secondary silicon

Elkem plans recycling rates above 50pc in the new products. The flows will include secondary silicon and FeSi slag fines. Therefore, the project can reduce waste while cutting clinker demand. Lower clinker intensity drives Scope 3 reductions for builders and OEMs. Partners can validate performance during pilot production in southern Norway.

Circular products for resilient supply chains

The initiative aligns with Europe’s low-carbon materials push. It also diversifies binder options for precast and ready-mix users. Meanwhile, cement substitution can ease price volatility tied to carbon costs. Elkem’s silicon expertise and grid access support competitive abatement costs.

The Metalnomist Commentary

Elkem’s move tackles two pain points: slag disposal and cement emissions. Watch durability data, SCM inclusion rates, and scale-up timelines. If pilots confirm strength and workability, demand from EU projects could ramp quickly.