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Influence of direct reduced iron on the energy balance of the electric arc furnace in steel industry

Title data

Kirschen, Marcus ; Badr, Karim ; Pfeifer, Herbert:
Influence of direct reduced iron on the energy balance of the electric arc furnace in steel industry.
In: Energy. Vol. 36 (2011) Issue 10 . - pp. 6146-6155.
ISSN 0360-5442
DOI: https://doi.org/10.1016/j.energy.2011.07.050

Abstract in another language

A model of the EAF energy efficiency was developed based on a closed mass and energy balance of the EAF melting process. This model was applied to industrial EAFs in steel industry charged with scrap or with mixes of scrap and DRI. Complex mass and energy conversion in the EAF was simplified with the introduction of mass and energy conversion efficiencies for the conversion of oxygen and the energy conversion of electrical energy in the electric arcs, chemical energy from the oxidation reactions in the melt and energy from the combustion of burner gas. It turned out that close agreement with observed process parameters from 16 EAFs is obtained by slight variations of the efficiency values. Especially the sensitivity of the steel temperature from the energy conversion efficiency of the electric arc energy indicates the importance of efficient foaming slag operation in EAF steel making. Characteristics and process parameters of DRI charged EAFs are discussed. Model results for a series of case studies illustrate the correlations between DRI chemical composition, DRI portion, oxygen consumption, etc. with electrical energy demand in order to indentify cost-effective EAF process conditions.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Research Institutions > Affiliated Institutes > Fraunhofer Center for High Temperature Materials and Design (HTL)
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 14 Jun 2019 07:09
Last Modified: 14 Jun 2019 07:09
URI: https://eref.uni-bayreuth.de/id/eprint/49539