University of Oulu

Kemppainen, A., Alatarvas, T., Iljana, M., Haapakangas, J., Mattila, O., Paananen, T., Fabritius, T. (2014) Water-gas Shift Reaction in an Olivine Pellet Layer in the Upper Part of Blast Furnace Shaft. ISIJ International, 54 (4), 801-809.

Water-gas shift reaction in an olivine pellet layer in the upper part of blast furnace shaft

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Author: Kemppainen, Antti1; Alatarvas, Tuomas1; Iljana, Mikko1;
Organizations: 1Laboratory of Process Metallurgy, University of Oulu, P.O Box 4300 FI-90014 Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: Iron and Steel Institute of Japan, 2014
Publish Date: 2021-01-20


In order to reduce CO₂ emissions in the iron and steel industry, the utilization of H₂ gas as a reducing agent is a feasible option. The use of hydrogen bearing injectants in the lower blast furnace (BF) area increases H₂O concentration in the upper part of the BF shaft and the charging of moist burden has a similar effect as well. For efficient BF operation, it is important to investigate the effect of high H2 and therefore high H₂O concentrations in the reducing gas. This study focuses on the upper BF shaft area where hematite to magnetite reduction takes place and temperature is in the range of the forward water-gas shift reaction (WGSR). The effect of the WGSR on the composition of the reducing gas was estimated by experimental methods. A layer furnace (LF) was used to determine the temperature for the occurrence of the WGSR under simulated BF shaft conditions. The feed gas conversion was investigated in an olivine pellet layer. The WGSR was observed in an empty LF with CO–H₂O–N₂ gas at 500°C. With CO–CO₂–H₂O–N₂ gas the WGSR was observed in an olivine pellet layer at 400–450°C and in a pre-reduced magnetite pellet layer at 300–400°C indicating the catalyzing effect of magnetite on the WGSR. The results offer additional information about the effect of high H₂O concentration on the composition of the reducing gas through the WGSR. The occurrence of the WGSR in the actual BF and its effects were discussed.

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Series: ISIJ international
ISSN: 0915-1559
ISSN-E: 1347-5460
ISSN-L: 0915-1559
Volume: 54
Issue: 4
Pages: 801 - 809
DOI: 10.2355/isijinternational.54.801
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Funding: This research is a part of the Energy Efficiency & Lifecycle Efficient Metal Processes (ELEMET) research program coordinated by the Finnish Metals and Engineering Competence Cluster (FIMECC). Ruukki Metals Oy and the Finnish Funding Agency for Technology and Innovation (TEKES) are acknowledged for funding this work.
Copyright information: © 2014 by The Iron and Steel Institute of Japan.