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Mathematical modelling of heat transfer in dedusting plants and comparison to off-gas measurements at electric arc furnaces

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  • Kirschen, Marcus
  • Velikorodov, Viktor
  • Pfeifer, Herbert

Abstract

A mathematical simulation tool is presented in order to model enthalpy flow rates of off-gas and heat transfer of cooling systems at dedusting plants in electric steel making sites. The flexibility of the simulation tool is based on a user-defined series of modular units that describe elementary units of industrial dedusting systems, e.g. water-cooled hot gas duct, air injector, drop-out box, mixing chamber, post-combustion chamber, filter, etc. Results of simulation were checked with measurements at industrial electric steel making plants in order to validate the models for turbulence, heat transfer and chemical reaction kinetics. Comparison between computed and measured gas temperature and composition yield excellent agreement. The simulation tool is used to calculate off-gas temperature and volume flow rate, where off-gas measurements are very difficult to apply due to high gas temperatures and high dust load. Heat transfer from the off-gas to the cooling system was calculated in detail for a pressurised hot water EAF cooling system in order to investigate the impact of the cooling system and the dedusting plant operation on the energy sinks of the electric arc furnace. It is shown that optimum efficiency of post-combustion of EAF off-gas in the water-cooled hot gas duct requires continuous off-gas analysis. Common operation parameters of EAF dedusting systems do not consider the non-steady-state of the EAF off-gas emission efficiently.

Suggested Citation

  • Kirschen, Marcus & Velikorodov, Viktor & Pfeifer, Herbert, 2006. "Mathematical modelling of heat transfer in dedusting plants and comparison to off-gas measurements at electric arc furnaces," Energy, Elsevier, vol. 31(14), pages 2926-2939.
    • Handle: RePEc:eee:energy:v:31:y:2006:i:14:p:2926-2939
    DOI: 10.1016/j.energy.2005.12.006
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    References listed on IDEAS

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    1. Bisio, G & Rubatto, G & Martini, R, 2000. "Heat transfer, energy saving and pollution control in UHP electric-arc furnaces," Energy, Elsevier, vol. 25(11), pages 1047-1066.
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    Cited by:

    1. Hocine, Labar & Yacine, Djeghader & Kamel, Bounaya & Samira, Kelaiaia Mounia, 2009. "Improvement of electrical arc furnace operation with an appropriate model," Energy, Elsevier, vol. 34(9), pages 1207-1214.
    2. Jie Yang & Shaowen Lu & Liangyong Wang, 2020. "Fused magnesia manufacturing process: a survey," Journal of Intelligent Manufacturing, Springer, vol. 31(2), pages 327-350, February.
    3. Trejo, Eder & Martell, Fernando & Micheloud, Osvaldo & Teng, Lidong & Llamas, Armando & Montesinos-Castellanos, Alejandro, 2012. "A novel estimation of electrical and cooling losses in electric arc furnaces," Energy, Elsevier, vol. 42(1), pages 446-456.

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