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Increasing EAF Energy Efficiency and Productivity by Excellence in Bottom Gas Purging

Title data

Kirschen, Marcus ; Periyasamy, Ravikumar ; Zettl, Karl-Michael:
Increasing EAF Energy Efficiency and Productivity by Excellence in Bottom Gas Purging.
In: South East Asia Iron and Steel Institute 2014 Conference and Exhibition : Conference Proceedings. - Kuala Lumpur, Malaysia , 2014 . - 11 S.

Abstract in another language

Modern EAF processes are subject to the cost-optimized production of raw steel melt in combination with very flexible productivity. Excellent mixing of the steel melt helps to improve mass and heat transfer, in order to accelerate the melting of scrap and direct reduced iron (DRI), decarburization, homogeneous superheating, alloy distribution, and to avoid skull formation.
Direct bottom gas purging not only promotes efficiently mixing of the steel melt in the entire steel bath but also provides constant gas bubble columns to avoid CO boiling retardation.
As a result, the efficiencies of energy transfer, oxygen injection, and alloy addition increases in the EAF process. Typical values of process improvements are -5 to -10 kWh/t and corresponding decrease of power-on time, and + 0.5 % yield.
Since few years EAF gas purging systems are experiencing a comeback as state-of-the-art EAF technology. This renaissance is driven by the continuous efforts for higher productivity and lower production costs of EAF steelmaking.
Recent case studies and new developments are presented. It is shown that gas purging systems represent a modern EAF technology to increase energy efficiency with minimum pay-back period.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: EAF; Gas purging; Process improvement; Energy savings; Alloy savings
Institutions of the University: Faculties > Faculty of Engineering Science
Research Institutions > Affiliated Institutes > Fraunhofer Center for High Temperature Materials and Design (HTL)
Faculties
Research Institutions
Research Institutions > Affiliated Institutes
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 Jun 2019 12:22
Last Modified: 29 Jul 2019 07:25
URI: https://eref.uni-bayreuth.de/id/eprint/49565