Steel slag CDR potential in Teesside

Characterising steel slag usage in Teesside

  • Alkaline wastes can offset CO2 emissions of mining and steelmaking industries.

  • Wastes management practices can enhance CO2 uptake in alkaline wastes.

  • Controlling the watering frequency enhances CO2 uptake in alkaline wastes.

  • Economic evaluation may encourage investments in passive carbonation technologies.

  • Key spatial datasets with iron and steel slag databases:

    • British Geological Survey (Digimap) – regions of ‘artificial made ground’ extracted within a 1.5km buffer of former iron and steel works
    • Verified OS Digimaps
    • OS Terrain 5 FTM – current topography of slag disposal areas
    • Centre for Ecology and Hydrology LCM (slag disposal area shapefiles)
  • Redcar & Cleveland has an estimated 10 million m3 identified iron and steel slag deposits.

    • Potential in Teesside (assuming 1500 kg/m3 density average):
      • DC = 4.44-5.06 Mt CO2
      • ERW = 6.33-8.76 Mt CO2
      • PC = 0.00012-0.18 Mt CO­2
    • Direct Carbonation and/or Enhanced Weathering are key to unlock the CDR potential of slag deposits in Teesside.

Land Use Map - Middlesbrough. Brown areas of interest - present challenging locations on south side of River Tees due to political and commercial regeneration uses. North of Tees may be more appropriate targets.