Process Improvements in EAF, Ladle, and AOD for High Alloyed and Stainless Steel Grades by Gas Purging Excellence

Title data

Kirschen, Marcus ; Ehrengruber, Reinhard ; Spiess, Bernhard ; Rotsch, Jens:
Process Improvements in EAF, Ladle, and AOD for High Alloyed and Stainless Steel Grades by Gas Purging Excellence.
In: 8th European Stainless Steel & Duplex Stainless Steel Conference 2015. - Leoben : Austrian Society for Metallurgy and Materials , 2015 . - 10 S.

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Abstract in another language

Modern production processes of high alloyed and stainless steel grades are subject to the cost-optimized production of raw molten metal in combination with very flexible productivity. Excellent mixing of the steel melt helps to improve mass and heat transfer in the EAF, in order to accelerate the melting of scrap and alloys, decarburization, homogeneous superheating, alloy distribution, and to avoid skull formation and solid remains that may obstruct tapping. A homogeneous distribution of alloys in the molten metal significantly helps avoid concentration gradients and improves yields, especially of chromium. Chromium oxides content in the slag decreases. Higher energy efficiency and lower specific energy demand of the EAF follow. The benefits of direct purging plug (DPP) systems in modern EAF processes are described in detail.
Control on the entire gas purging technology from refractory to valve control and purging strategy is crucial for high reliability and availability of the purging system. With years of purging experience, RHI/INTERSTOP presents an entirely revised gas control system for application at the EAF, Ladles, and AOD converter.

Further data

Item Type:	Article in a book
Refereed:	Yes
Keywords:	Stainless Steel; EAF; Ladle; AOD; Gas Purging; Resource Efficiency; Cost 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:	19 Jun 2019 06:24
Last Modified:	19 Jun 2019 06:24
URI:	https://eref.uni-bayreuth.de/id/eprint/49581