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Investigation on the Influence of the Arc Region on Heat and Mass Transport in an EAF Freeboard using Numerical Modeling
Author(s) -
Gruber Jacqueline C.,
Echterhof Thomas,
Pfeifer Herbert
Publication year - 2016
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400513
Subject(s) - freeboard , electric arc furnace , electric arc , electric energy consumption , heat transfer , mechanics , combustion , nuclear engineering , scrap , arc (geometry) , mass transfer , materials science , chemical energy , energy consumption , current (fluid) , mechanical engineering , metallurgy , power (physics) , waste management , thermodynamics , engineering , electric energy , chemistry , electrical engineering , electrode , organic chemistry , physics , fluidized bed
The melting of scrap in an electric arc furnace is a highly energy intensive process, whereby the energy required depends on the individual operational parameters of a heat, size of the furnace, and type of steel being produced. In current EAF operation, up to and sometimes more than 40% of the total energy consumption is provided by chemical sources like natural gas, charged and injected carbon, etc. Since the optimization of electrical and chemical energy use within the furnace is an important and ongoing process, to use as much of the chemical energy inside the furnace as possible is mandatory. However, the high temperatures and electromagnetic interference during the power‐on phase make it hard to monitor and control the transient processes within an electric arc furnace. To increase the understanding of heat and mass transfer inside the electric arc furnace freeboard, which directly influences the post‐combustion of, e.g., CO and H 2 , the influence of the arc jets on fluid flow and temperature distribution in the arc region has been investigated using numerical modeling. In this paper, we show the results achieved so far and present the conclusions gained as well as the challenges that still have to be overcome.