H2II - Hydrogen sequence impulse injection into the Blast Furnace shaft

Initial situation:

  • CO2 emissions in the steel industry must be reduced by 55% by 2030.
  • New technology routes will not have been implemented to this extent by then.
  • Rapidly deployable interim technologies are essential.
  • Hydrogen reduction can save up to 20% of CO2 emissions from a blast furnace.
  • Hydrogen achieves higher reduction rates even at lower temperatures than CO (from approx. 800°C).
  • Due to the low density of hydrogen, it is difficult to achieve high penetration depths when injecting hydrogen into the burden column.
  • Impulse injection technology has shown in continuous industrial use that it achieves greater penetration depths and more favourable gas flow in the shaft.

Project targets:

  • Technical demonstration of Pulse injection of hydrogen into the Blast furnace shaft
    • above the cohesive zone.

Innovative approaches:

  • Injection in the shaft instead of through the hot blast tuyeres
  • Injection of hydrogen instead of carbon monoxide as reduction agent
  • Pulsed injection instead of continuous injection

Benefits for the industry:

  • Improving process efficiency
  • Reduction of CO2 emissions
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