University of Oulu

Heikkilä, A., Iljana, M., Bartusch, H. and Fabritius, T. (2020), Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions. steel research int.. doi:10.1002/srin.202000047

Reduction of iron ore pellets, sinter, and lump ore under simulated blast furnace conditions

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Author: Heikkilä, Anne1; Iljana, Mikko1; Bartusch, Hauke2;
Organizations: 1Process metallurgy research unit/University of Oulu, P. O. Box 4300, FI-90014 University of Oulu, Finland
2VDEh-Betriebsforschungsinstitut GmbH, Germany
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.8 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020100277886
Language: English
Published: John Wiley & Sons, 2020
Publish Date: 2020-10-02
Description:

Abstract

A blast furnace (BF) is the dominant process for making iron in the world. The BF is charged with metallurgical coke and iron burden materials including iron ore pellets, sinter, and lump ore. While descending in the BF the charge materials reduce. The iron‐bearing materials should reduce fast and remain in the solid form until as high a temperature as possible to ensure reaction contact with reducing gas and iron oxides. Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high‐temperature furnace at four different temperatures (700, 800, 900, and 1000 °C) for 300 min. The experimental atmosphere consists of CO, CO₂, H₂, H₂O, and N₂ simulating the conditions in the BF shaft. It is found that lump ore has lowest reduction rate in all test conditions, and at lower temperatures iron ore pellets reduce faster than sinter, and this is reversed at higher temperatures. Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: Early view
DOI: 10.1002/srin.202000047
OADOI: https://oadoi.org/10.1002/srin.202000047
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The work presented here was conducted with a financial grant from the Research Fund for Coal and Steel (RFCS) of the European Community with grant agreement no. 709816 and project title “Online Blast Furnace Stack Status Monitoring."
Copyright information: © 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
  https://creativecommons.org/licenses/by-sa/4.0/