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Dynamic modelling for the hot blast stove
RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS. Luleå University of Technology, Luleå, Sweden.
Luleå University of Technology, Luleå, Sweden.
SSAB Special Steels, Oxelösund, Sweden.
Siemens VAI Metals Technologies, Canonsburg, United State.
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2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 185, 2142-2150 p.Article in journal (Refereed) Published
Abstract [en]

A large amount of energy is required in the production of steel where the preheating of blast in the hot blast stoves for iron-making is one of the most energy-intensive processes. To improve the energy efficiency of the steelmaking it is necessary to investigate how to improve the hot blast stove operation. In this work a mathematic model for evaluating the performance of the hot blast stove was developed using a finite difference approximation for the heat transfer inside the stove during operation. The developed model was calibrated and validated by using the process data from hot blast stove V26 at SSABs plant in Oxelösund, Sweden. The investigation shows a good agreement between the measured and modelled data. As a case study, the developed model was used to simulate the effect of a new concept of OxyFuel technique to hot blast stoves. The investigation shows that, by using this OxyFuel technique, it is possible to maintain the blast temperature while removing the usage of coke oven gas (COG). The saved COG can be used to replace some fossil fuel, such as oil and LPG. Furthermore, the effect of the cycle time on the single stove was studied. As expected, both the hot blast and flue gas temperatures are increased when increasing the cycle time. This shows that it is a good strategy for the hot blast stove to increase the blast temperature if the stove is currently not operated with the maximum allowed flue-gas temperature.

Place, publisher, year, edition, pages
2017. Vol. 185, 2142-2150 p.
Keyword [en]
Blast furnace stove, Flame temperature, Flue gas, Heat transfer, Hot blast, Blast furnaces, Coke ovens, Energy efficiency, Finite difference method, Flue gases, Flues, Fossil fuels, Blast temperature, Developed model, Finite difference approximations, Flame temperatures, Flue gas temperatures, Hot blast stoves, Large amounts, Mathematic model, Stoves
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-29382DOI: 10.1016/j.apenergy.2016.02.128ScopusID: 2-s2.0-84959554159OAI: oai:DiVA.org:ri-29382DiVA: diva2:1093754
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-05-08Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
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More styles
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