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Phase equilibrium diagram for EAF slag optimization in high alloyed Chromium stainless steelmaking

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00005552
URN to cite this document: urn:nbn:de:bvb:703-epub-5552-2

Title data

Kirschen, Marcus ; Jung, In-Ho ; Hackl, Gernot:
Phase equilibrium diagram for EAF slag optimization in high alloyed Chromium stainless steelmaking.
In: Metals. Vol. 10 (2020) Issue 6 . - No. 826.
ISSN 2075-4701
DOI der Verlagsversion: https://doi.org/10.3390/met10060826

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Project financing: Deutsche Forschungsgemeinschaft

Abstract

The EAF process for steelmaking of Cr and Ni high alloyed stainless steel grades differs significantly from the steelmaking process of carbon steel due to special raw materials and generally lower oxygen consumption. The special slag chemistry in EAF process affects slag foaming and refractory wear characteristics due to an increased content of CrOx. A special slag diagram is presented in order to improve monitoring and control of slag compositions for Cr alloyed heats, with special focus on saturation to MgO periclase and dicalcium silicate C2S in order to minimize MgO losses from the refractory lining and to improve slag refining capability by avoidance of stabile C2S. With the same diagram different EAF process strategies can be efficiently monitored, either at elevated CaO and basicity with lower spinel concentration and more liquid process slags near C2S saturation or at lower CaO content and basicity with increased spinel concentration and stiffer slags at MgO saturation but certainly no C2S stability. Examples for three industrial EAFs are given.

Further data

Item Type: Article in a journal
Additional notes (visible to public): https://www.mdpi.com/2075-4701/10/6/826/review_report
Keywords: Electric arc furnace; Stainless steel making; Slag modelling; Phase diagram
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Thermal Process Technology
Faculties > Faculty of Engineering Science > Chair Thermal Process Technology > Chair Thermal Process Technology - Univ.-Prof. Dr. Marcus Tobias Kirschen
Research Institutions > Affiliated Institutes > Fraunhofer Center for High Temperature Materials and Design (HTL)
Faculties
Research Institutions
Research Institutions > Affiliated Institutes
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-5552-2
Date Deposited: 19 May 2021 08:03
Last Modified: 19 May 2021 08:04
URI: https://epub.uni-bayreuth.de/id/eprint/5552

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