University of Oulu

Heikkilä, A.M., Koskela, A.M., Iljana, M.O., Lin, R., Bartusch, H., Heikkinen, E. and Fabritius, T.M.J. (2021), Coke Gasification in Blast Furnace Shaft Conditions with H2 and H2O Containing Atmospheres. steel research int., 92: 2000456. https://doi.org/10.1002/srin.202000456

Coke gasification in blast furnace shaft conditions with H₂ and H₂O containing atmospheres

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Author: Heikkilä, Anne M.1; Koskela, Aki M.1; Iljana, Mikko O.1;
Organizations: 1Process Metallurgy Research Unit/ University of Oulu, P.O. Box 4300, FI-90014 University of Oulu, Finland
2AG der Dillinger Huettenwerke, Werkstrasse 1, 66763 Dillingen/Saar, Germany
3VDEh-Betriebsforschungsinstitut GmbH, Sohnstr. 65, 40237 Düsseldorf, Germany
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe20201210100273
Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2021-11-02
Description:

Abstract

Most of world steel in 2018 has been produced from virgin iron ore via the blast furnace (BF)—basic oxygen furnace route. Therewith the BF is one of the most important unit processes in worldwide steel making. Among others, energy efficiency of the BF is dependent on coke reactivity. Coke gasification occurs via solution‐loss reactions either with CO₂ or H₂O. Herein, the gasification of coke is studied in CO–CO₂–H₂–H₂O–N₂ atmosphere simulating the BF conditions. The simulated atmospheres are based on the measurements from an actual BF. This research studies the effect of the composition of the BF atmosphere representing conditions near the wall as well as at the center and influence of the H₂O content on coke gasification under simulated BF conditions. It is found that the location plays a role in coke gasification: wall atmosphere yields higher coke gasification compared with center. Dynamic tests show that introduction of H₂ and H₂O in gas atmosphere fastens coke gasification by +119% at temperature range between 800 and 1200 °C in wall conditions. When H₂O is present in gas atmosphere, the mass loss of coke is also greater in both wall and center conditions.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 92
Issue: 3
Article number: 2000456
DOI: 10.1002/srin.202000456
OADOI: https://oadoi.org/10.1002/srin.202000456
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The work presented here has been carried out 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 Wiley‐VCH GmbH. "This is the peer reviewed version of the following article: Heikkilä, A.M., Koskela, A.M., Iljana, M.O., Lin, R., Bartusch, H., Heikkinen, E. and Fabritius, T.M.J. (2021), Coke Gasification in Blast Furnace Shaft Conditions with H2 and H2O Containing Atmospheres. steel research int., 92: 2000456, which has been published in final form at https://doi.org/10.1002/srin.202000456. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."