ELECTRIC ARC FURNACE ROOF TOP AND CENTRAL PORTION FOR THIS ROOF TOP
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Jul 20, 2007
filing date -
Jul 20, 2006
priority date (Note) -
Abandoned
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Abstract
An electric arc roof furnace top contains a central portion and a peripheral portion surrounding the central portion. Each of these portions has an inner surface suitable for facing the furnace inner space. The inner surfaces of the peripheral and central portions form together a step so as to raise the inner surface of the central portion in relation to the inner surface of the peripheral portion with respect to the furnace inner space.
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