Bewertung des Erweichungs- und Aufschmelzverhaltens von DRI im Hochofen

Translated title of the contribution: Investigations on the behavior of DRI in a blast furnace shaft

Kevin Kriebernegg

Research output: ThesisMaster's Thesis

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Abstract

One of the largest sources of CO2 emissions is the iron and steel industry. To achieve the goals of the Climate Agreement of Paris, more environmentally friendly processes and technologies must be developed. With the reduction of iron ore carriers with natural gas or hydrogen as reducing agents, a considerable reduction of CO2 can be achieved. The near-term conversion of all existing aggregates is unrealistic, therefore, temporary solutions must be found. Such a temporary solution could be charging Direct Reduced Iron (DRI) in the blast furnace. However, there is still a lack of experience in charging DRI in the blast furnace. In this work, the behavior of DRI in the blast furnace is simulated and evaluated with the aid of various methods, like Reduction Under Load ISO 7992, Low Temperature Disintegration ISO 4696-1 and REAS. These tests showed the lower stability of the DRI in contrast to blast furnace pellets. Also, the cohesive zone is expanding with the use of DRI in the blast furnace, and the melting points get higher. Nevertheless, the use of DRI in the blast furnaces has big potential to reduce emissions and therefore contributes to achieve the climate targets.
Translated title of the contributionInvestigations on the behavior of DRI in a blast furnace shaft
Original languageGerman
QualificationDipl.-Ing.
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • Schenk, Johannes, Supervisor (internal)
  • Pfeiffer, Andreas, Co-Supervisor (internal)
Award date1 Jul 2022
Publication statusPublished - 2022

Bibliographical note

no embargo

Keywords

  • Softening
  • Melting
  • DRI
  • blast furnace
  • Low-Temperature-Disintegration
  • Reduction under Load
  • REAS

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