ISSN 2594-5300
30º Seminário de Aciaria — Vol. 01 , num. 30 (1999)
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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.
Palavras-chave
Electric Arc Furnace, Industrial Gases, Energy, Scrap Preheating, Oxygen Injection
Electric Arc Furnace, Industrial Gases, Energy, Scrap Preheating, Oxygen Injection
Como citar
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
