From Steelmaking Slag to Sustainable Building Materials

​Slag2Build pioneers a new way of transforming ladle furnace slag (LFS) into high‑value, low‑impact materials for the construction sector. Through an advanced dry‑granulation technology and the combined expertise of leading industrial partners, the project turns a steelmaking by‑product into a resource for circular, low‑carbon building solutions.

How It Works

• Granulation at industrial scale
  STOMANA processes LFS using an innovative dry‑granulation system, producing high‑quality granulated slag ready for further treatment.

• Material characterization
  RINA‑CSM analyzes the material to ensure consistent quality, performance, and suitability for construction applications.

• From slag to construction products
  Carmeuse and FEhS mill and blend the granulated LFS to produce sustainable cementitious materials, mortars, and hydraulic binders with significant clinker substitution.

• Cross‑industry replicability
  LME and CELSA test the granulation process on their own LFS streams, confirming that the technology works across different steelmaking routes.

Why It Matters

• Reduced environmental impact
  Lower CO₂ emissions and less reliance on virgin raw materials.

• Real circular economy
  Industrial by‑products transformed into new, high‑performance construction inputs.

• Scalable and replicable
  Designed for deployment across multiple steel plants in Europe and beyond.

A New Era for Circular Construction

Slag2Build demonstrates how innovation, industrial collaboration, and sustainability can reshape material value chains—turning steelmaking residues into essential components of the buildings of tomorrow.