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Heat transfer, energy saving and pollution control in UHP electric-arc furnaces

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  • Bisio, G
  • Rubatto, G
  • Martini, R

Abstract

The use of hot-water and evaporative cooling enables the residual energy potential of iron and steel works to be utilized. In particular, water-traversed wall elements are used at present in the top zone of an electric-arc furnace. Indeed, the remarkable increase in the electrical power has made the cooling of the wall of the furnace compulsory. Thus, it seems suitable to use the energy recovered in the cooling elements, instead of transferring it to the atmosphere via closed cooling towers. Nucleate boiling leads to a substantially more intensive cooling, but even a limited increase in the input heat flow can be dangerous. If the slag accretions, temperature and thermal power are examined in cases of steady state furnace operation and completely slag-covered arcs, it is found that the thermal losses decrease remarkably as the melting temperature of the slag adhering to the furnace shell increases. The aim of this paper is, first of all, an analysis of heat transfer phenomena in UHP (ultra high power) electric-arc furnaces. Then, energy and exergy analyses are dealt with after some remarks about exergy efficiency and chemical exergy of elements. In addition, means to reduce noise, air and water pollution are examined.

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  • 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.
    • Handle: RePEc:eee:energy:v:25:y:2000:i:11:p:1047-1066
    DOI: 10.1016/S0360-5442(00)00037-2
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    References listed on IDEAS

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    Cited by:

    1. Ostrovski, Oleg & Zhang, Guangqing, 2005. "Energy and exergy analyses of direct ironsmelting processes," Energy, Elsevier, vol. 30(15), pages 2772-2783.
    2. Zhang, Jianling & Wang, Guoshun, 2008. "Energy saving technologies and productive efficiency in the Chinese iron and steel sector," Energy, Elsevier, vol. 33(4), pages 525-537.
    3. Thompson, Shirley & Si, Minxing, 2014. "Strategic analysis of energy efficiency projects: Case study of a steel mill in Manitoba," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 814-819.
    4. Gajic, Dragoljub & Savic-Gajic, Ivana & Savic, Ivan & Georgieva, Olga & Di Gennaro, Stefano, 2016. "Modelling of electrical energy consumption in an electric arc furnace using artificial neural networks," Energy, Elsevier, vol. 108(C), pages 132-139.
    5. 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.
    6. 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.
    7. 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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