Hot Briquetted Iron (HBI) use in
Basic Oxygen Steelmaking Furnaces (BOF)

Hot Briquetted Iron (HBI) is a manufactured product with guarantee specifications.

HBI Provides an Optimal BOF Charge Due to:

  • Low levels of residual elements
  • Bulk density of 2800 kg/m3 is higher than any type of scrap
  • Same metallic yield as hot metal
  • More predictable mass and heat balances

HBI an Excellent Trim Coolant Due to the Following Characteristics:

  • Free-flowing from overhead bins
  • Well defined physical and chemical properties
  • Maintains steel bath composition
  • Easily charged from overhead bins
  • Rapid penetration of slag
  • Reduces slag volume when used instead of fluxes

Other Advantages:

  • Protects furnace bottom by feeding charge pad before scrap charge; therefore, less refractory damage occurs
  • Can be fed into charge pan to adjust final weight to avoid charge delays

Results of Charging HBI as Part of the Solid Charge Mix



The use of HBI as part of the solid charge mix is recommended for the following situations:

  • When the proportion of hot metal and scrap used results in overheating at the end of the blowing process (using Hot Briquetted Iron (HBI) as a coolant produces the desired temperature without a cooling process)
  • When the addition of fluxes or iron ore pellets is utilized to meet the energy balance (using Hot Briquetted Iron (HBI) as a replacement)
  • When the amount of hot metal needs to be increased When scrap availability is an issue
  • When lower sulfur content of the charge material is required
  • When lower residual content is required

You may also like to read MIDREX – A Direct Reduced Iron Product For Oxygen Steelmaking.