ISSN 2594-5300
30º Seminário de Aciaria — Vol. 01 , num. 30 (1999)
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Abstract
Today’s electric arc furnace (EAF) is a very sophisticated piece of equipment, which since the introduction of ladle metallurgy has been gradually turned into a pure melting machine. But there seems to still be a potential for improvements. There is a strong trend towards a decreased use of electricity. A modern EAF has a total energy turnover at about 650 kWh/t, but only 60% of that energy is needed to melt the scrap. The electricity consumption is roughly 400 kWh/t in combination with different types of chemical energy. However, we can find furnaces operating at 300 kWh/t, which is mainly explained by a lower energy turnover and an increased addition of other forms of energy. An important contribution to this development is the use of oxygen; today there are EAFs with a specific oxygen use above 50 Nm³/t. With an emphasis on industrial gas applications, an overview of the latest technologies employed in the EAF process is given, and the path towards an electricity consumption at 200 kWh/t is outlined. The discussion is focused on scrap preheating technologies, air-tight operation, process control, slag practice, new tools for the use of industrial gases, like combined lance-burners, and combinations with other forms of energy.
Today’s electric arc furnace (EAF) is a very sophisticated piece of equipment, which since the introduction of ladle metallurgy has been gradually turned into a pure melting machine. But there seems to still be a potential for improvements. There is a strong trend towards a decreased use of electricity. A modern EAF has a total energy turnover at about 650 kWh/t, but only 60% of that energy is needed to melt the scrap. The electricity consumption is roughly 400 kWh/t in combination with different types of chemical energy. However, we can find furnaces operating at 300 kWh/t, which is mainly explained by a lower energy turnover and an increased addition of other forms of energy. An important contribution to this development is the use of oxygen; today there are EAFs with a specific oxygen use above 50 Nm³/t. With an emphasis on industrial gas applications, an overview of the latest technologies employed in the EAF process is given, and the path towards an electricity consumption at 200 kWh/t is outlined. The discussion is focused on scrap preheating technologies, air-tight operation, process control, slag practice, new tools for the use of industrial gases, like combined lance-burners, and combinations with other forms of energy.
Keywords
Electric Arc Furnace, Industrial Gases, Energy, Scrap Preheating, Oxygen Injection
Electric Arc Furnace, Industrial Gases, Energy, Scrap Preheating, Oxygen Injection
How to cite
Schéele, Joachim von; Jr., Reinaldo Machado Lima; Netto, Moacyr de Almeida.
TOWARDS AN ELECTRIC ARC FURNACE OPERATION WITH 200 kWh/T ELECTRIC ENERGY,
p. 451-460.
In: 30º Seminário de Aciaria,
São Paulo, Brasil,
1999.
ISSN: 2594-5300, DOI 10.5151/2594-5300-30Aciaria-451-460
