Iron ore wires as consumable electrodes for the hydrogen plasma smelting reduction in future green steel production

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Hauke Springer
  • Isnaldi Rodrigues de Souza Filho
  • L. Choisez
  • Michael Andreas Zarl
  • Cameron Quick

Organisational units

External Organisational units

  • Max-Planck-Institut für Eisenforschung GmbH
  • RWTH Aachen
  • K1-MET GmbH; Stahlstraße 14; Linz, 4020, Austria
  • Katholieke Universiteit Leuven
  • voestalpine Böhler Welding Austria GmbH

Abstract

In this work we investigate the feasibility and optimisation pathways for using oxide-filled consumable electrodes as both ore feeding system and reducing/melting arc carrier in the hydrogen plasma smelting reduction process. Similar in nature to Söderberg-type electrodes, but free of C-containing substances, this approach has the potential advantage of eliminating the carbon emissions stemming from conventional electric arc furnace electrodes while drastically simplifying the ore feeding into the process. Using a commercial welding setup with a 1.2 mm thick oxide-cored steel wire, area investigations indicate that approximately 50% of the introduced iron ore could be reduced to metallic iron at 100 A arc current under an Ar-10% H2 atmosphere independent from deposition time. The reduction efficiency was negatively affected by increasing arc current and it was increased by using the wire as the anode. Based on the performed variation of deposition parameters, microstructural characterisation results, high speed footage and first upscaling trials, the key scientific questions and engineering pathways for technological optmisiation towards future green steel production technology are outlined and discussed.

Details

Original languageEnglish
Article numbere00785
Number of pages10
JournalSustainable Materials and Technologies
Volume39.2024
Issue numberApril
DOIs
Publication statusE-pub ahead of print - 28 Nov 2023