Method and installation for production of secondary steel based on scrap
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United States of America Patent
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May 18, 2010
Grant Date -
May 22, 2008
app pub date -
Dec 2, 2005
filing date -
Dec 4, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
At the production of the secondary steel based on scrap, wherein the scrap (10) is fed in a scrap preheater (2) through a charging device (1), is preheated there and, finally, is brought into a smelting unit (3) and is melted there with primary energy only, the process gases (19), which leave the smelting unit (3), are not used any more for directly preheating the scrap (10) but are rather used indirectly by heating a gaseous preheatable medium, e.g., air (18) or inert gas, whereby energetic, fluidic, and spatial decoupling of preheating and melting and of post-combustion and preheating is achieved.
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