ISSN 2594-5300
28º Seminário de Aciaria — Vol. 01 , num. 28 (1997)
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Abstract
The DANIELI CENTROMET Arc Furnace concept, DANARC™, is based on experience since 1970 in the design and manufacturing of equipment for electric steel making. The DANARC™ concept includes not only the furnace itself but also all auxiliary equipment required for the utilization of modern process technologies. In this paper AC and DC power supply system characteristics is discussed and the associated EAF operational features are highlighted. The DC furnace concept is typically selected for the purpose of the achievement of reduced electrode consumption as compared to AC operation. However, experience have shown limited benefits with the Single Electrode DC EAF as compared to High Impedance AC EAF's especially when it comes to UHP applications. It is shown that it is more favourable to operate the DC EAF with two graphite electrodes, a concept which also allows the use of standard type of electrodes. Up to 35% lower electrode consumption can be expected compared to single electrode furnaces. A DANIELI 135 ton Twin Electrode DC EAF with an installed power of 208 MVA will be in operation at HYLSA, Flat Product Division, Monterray, Mexico early 1998. The demand for lowest possible EAF tap-to-tap time aiming at high productivity and low consumption figures has created an interest in the Twin Shell EAF concept. Typical applications for DRI/HBI melting, 100% scrap melting as well as the use of hot metal in combination with scrap or DRI are described. The use of additional power sources such as post combustion burners and oxidising reactions as energy source is discussed based on theoretical considerations and operational results.
The DANIELI CENTROMET Arc Furnace concept, DANARC™, is based on experience since 1970 in the design and manufacturing of equipment for electric steel making. The DANARC™ concept includes not only the furnace itself but also all auxiliary equipment required for the utilization of modern process technologies. In this paper AC and DC power supply system characteristics is discussed and the associated EAF operational features are highlighted. The DC furnace concept is typically selected for the purpose of the achievement of reduced electrode consumption as compared to AC operation. However, experience have shown limited benefits with the Single Electrode DC EAF as compared to High Impedance AC EAF's especially when it comes to UHP applications. It is shown that it is more favourable to operate the DC EAF with two graphite electrodes, a concept which also allows the use of standard type of electrodes. Up to 35% lower electrode consumption can be expected compared to single electrode furnaces. A DANIELI 135 ton Twin Electrode DC EAF with an installed power of 208 MVA will be in operation at HYLSA, Flat Product Division, Monterray, Mexico early 1998. The demand for lowest possible EAF tap-to-tap time aiming at high productivity and low consumption figures has created an interest in the Twin Shell EAF concept. Typical applications for DRI/HBI melting, 100% scrap melting as well as the use of hot metal in combination with scrap or DRI are described. The use of additional power sources such as post combustion burners and oxidising reactions as energy source is discussed based on theoretical considerations and operational results.
Keywords
Electric Arc Furnace, DANARC, DC Furnace, AC Furnace, Steelmaking
Electric Arc Furnace, DANARC, DC Furnace, AC Furnace, Steelmaking
How to cite
Bergman, Kjell.
Recent Developments in DANIELI Electric Arc Furnace Technologies,
p. 105-124.
In: 28º Seminário de Aciaria,
São Paulo, Brasil,
1997.
ISSN: 2594-5300, DOI 10.5151/2594-5300-28Aciaria-105-124
