NUMERICAL SIMULATION OF ENERGY-EFFICIENT SOLUTIONS OF THE ARC FURNACE STEEL MELTING BATH
DOI:
https://doi.org/10.34185/1991-7848.itmm.2024.01.009Keywords:
arc steel melting furnace, energy efficiency, , pneumatic stirring, convective melting of scrapAbstract
Numerical modeling of hydrodynamics and heat and mass transfer in the arc furnace (EAF) steel melting bath under pneumatic stirring conditions demonstrates that the introduction of a «deep» bath with a form factor (ratio of diameter to depth) of 2.5 against the traditional 5.0 provides an energy-efficient bubbling mode of purging at higher inert gas flowrate. An increase in the diameter of the porous plug and the volume of the two-phase region in the "deep" bath allows in 150-ton EAF to increase the mixing power and the coefficient of convective heat transfer in liquid steel by 2-2.2 and 1.4 times on average, respectively. In the context of the «flat bath» process, it is shown the possibility of intensifying the convective melting of scrap in the bath by 24% in average and, thus, increasing productivity and, accordingly, improving the energy efficiency of the EAF.
References
Malfa, E., Giavani, C., Battaglia, V. The evolution of the Consteel® EAF. SEAISI Quarterly (South East Asia Iron and Steel Institute) May 2012, 41(3).
Guo, D., Irons, J. Modeling of radiation intensity in an EAF. Third International Conf. of CRD in the Minerals and process industry. Proc. CSIRO, Melbourne,
Australia, 2003, p. 223-228.
Gonsalez, O., Ramirez-Argaez, M., Conejo, A. Effect of arc length on fluid flow and mixing phenomena in electric arc furnace. ISIJ International, 2010, vol.50, 1, p. 1-8.
Kawakami, М. Takatani, R, Brabie, L. Heat and mass transfer analysis of scrap melting in steel bath. Tetsu to Hagane, 1999, vol. 85, 9, p. 658-665.
Li, J., Provatas, N., Irons, G. Modeling of scrap melting in the heel of an EAF. Iron & Steel Technology, 2008, vol.5, 3, p.216-223.
Guo, D. Swickard, D. Alavanjaetal, М. Numerical Simulation of Heavy Scrap Melting in BOF Steelmaking. Iron & Steel Technology, 2013, 4, p. 125-132.
Timoshenko, S.N, Stovpchenko, A.P., Kostetski, Yu.N. Gubinski, M.V. Energy efficient solutions for EAF steelmaking. Journal of Achievements in Materials and Manufacturing Engineering, 2018, vol. 88, 1, p. 18-24.
D. Mazumdar, J., Evans, Modeling of Steelmaking Processes. Boca Raton, London, New York: CRC Press, 2010, 463 p.
