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Structure and alkali content of coke in an experimental blast furnace and their gasification reaction
KTH, Superseded Departments, Metallurgy.
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2004 (English)Conference paper (Refereed)
Abstract [en]

Coke samples excavated from LKAB's Experimental Blast Furnace (EBF) at MEFOS in Luleå, Sweden were used to observe the influence of in-furnace reactions on the changes in chemical stracture of cokes and their influence on kinetics of CO 2 reactivity. In addition to growth of carbon crystallite of coke, alkali concentration particularly potassium and sodium were found to increase as coke descended towards lower part of the EBF. The increase in carbon structure could be linearly related to measured temperature profiles of EBF. Isothermal and non-isothermal TGA measurements are shown to indicate that CO 2 reactivity of coke becomes progressively faster as it moves towards lower part of blast furnace. The study suggests that alkali enrichment of cokes in an operating blast furnace could have a strong catalytic effect on the CO 2 reactivity. Further research is expected to clarify the mechanisms of influence of coke minerals on reactivity and their implications in a blast furnace.

Place, publisher, year, edition, pages
2004. 491-502 p.
, AISTech - Iron and Steel Technology Conference Proceedings, ISSN 1551-6997
Keyword [en]
Alkali contents, Carbon structure, Coke property, Experimental blast furnaces (EBF), Alkalinity, Carbon dioxide, Catalysis, Coal gasification, Coke, Crystalline materials, Isotherms, Reaction kinetics, Structure (composition), Thermogravimetric analysis, Blast furnaces
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-157298ScopusID: 2-s2.0-18044378155OAI: diva2:771067
AISTech 2004 - Iron and Steel Technology Conference Proceedings, 15 September 2004 through 17 September 2004, Nashville, TN, United States

QC 20141212

Available from: 2014-12-12 Created: 2014-12-08 Last updated: 2014-12-12Bibliographically approved

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Von Oelreich, AnneFredriksson, PatrikSeetharaman, Seshadri
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