University of Oulu

Heikkilä, A., Koskela, A., Iljana, M. & Fabritius, T. (2022). Compression strength of coke after gasification. In ECIC-ICSTI proceedings 2022. Düsseldorf: TEMA Technologie Marketing AG.

Compression strength of coke after gasification

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Author: Heikkilä, Anne1; Koskela, Aki1; Iljana, Mikko1;
Organizations: 1University of Oulu, Process Metallurgy, PO Box 4300, FI-90014, Finland
Format: abstract
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
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Language: English
Published: TEMA Technologie Marketing AG, 2022
Publish Date: 2023-05-10


In this work gasification of different types of coke (higher quality and lower quality) were subjected with two different gas-atmosphere profiles (H₂-H₂O-CO-CO₂-N₂ and CO-CO2-N2) simulating Blast Furnace circumstances. It was found out that coke was more reactive towards H₂ and H₂O containing gas atmosphere. After gasification, coke samples were subjected to compression strength tests. It was found out that although higher quality coke reacted more intensively in H₂ and H₂O containing atmosphere, the compression strength properties were not harmed by the reaction of a higher extent. The compression strength properties were improved after gasification in H₂ and H₂O containing atmosphere for the higher quality coke. This could be due to increase in small-scale pores which make the porous structure more uniform and therefore decrease the heterogeneity of elasticity throughout the coke structure. Image analysis showed a linear correlation between strength, strain and area percentage of large pores in the coke structure.

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Pages: 1 - 8
Host publication: ECIC-ICSTI proceedings 2022
Conference: ECIC & ICSTI
Field of Science: 216 Materials engineering
Funding: The work presented here has been carried out in 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”. This work has been written during Academy of Finland project “Towards carbon neutral steelmaking; researching biocoke and pellets with hydrogen in atmosphere”.
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