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Further Opportunities of Competitiveness Improvements for Direct Reduction Plants

  • Robert MillnerEmail author
  • Johannes Rothberger
  • Hanspeter Ofner
  • Angelika Klinger
  • Mike Arandas
  • Vincent Chevrier
Originalarbeit

Abstract

Even though the Midrex Process is the most successful direct reduction process in the world, additional improvements are still possible.

This paper discusses some of those additional opportunities for improvements of Direct Reduction plants in order to increase the plant competitiveness and/or flexibility. Such plant improvements have either already been implemented in the latest projects or were recently developed by Midrex and/or Primetals Technologies. Some of these plant improvements are: Adjustable Carbon Technology (ACTTM)—Increase of carbon content depending on HBI off-taker/user requirements; Process Water Degasser—Degassing of process water from CO2 to improve water quality and lower operation/maintenance cost; Slurry Treatment by Chamber Filter Presses—Efficient dewatering of slurry from clarifier with low operating and maintenance cost; DRIpaxTM Carbon and Metallization Prediction—Improvement of plant operation by stable product quality; DRIpaxTM DR Plant Expert System—Increased support of operation team.

Such improvements have plenty of benefits including reduction of the OPEX costs, increase in oxide to product yield, improve the operation/maintenance, and/or increase the availability/flexibility of a Midrex plant. These improvements can be retrofitted in existing plants or implemented for new direct reduction plants.

Keywords

ACTTM COREX® Degasser Direct reduction DRIpaxTM carbon and metallization Prediction models DRIpaxTM DR plant expert system MIDREX® HBI Primetals Technologies 

Notes

References

  1. 1.
  2. 2.
    Arandas, M.: Technologies for Maximizing Operational Flexibility of MIDREX® DRI Plants: Adjusting Product Carbon in MIDREX® DRI Products, presented at AISTech 2017 in Nashville, TN, USA, 2017Google Scholar

Copyright information

© Austrian Society for Metallurgy of Metals (ASMET) and Bergmännischer Verband Österreich (BVÖ) 2019

Authors and Affiliations

  • Robert Millner
    • 1
    Email author
  • Johannes Rothberger
    • 1
  • Hanspeter Ofner
    • 1
  • Angelika Klinger
    • 1
  • Mike Arandas
    • 2
  • Vincent Chevrier
    • 2
  1. 1.Primetals Technologies Austria GmbHLinzAustria
  2. 2.Midrex Technologies Inc.CharlotteUSA

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