Installation for production of secondary steel based on scrap
AssigneeSMS Siemag Aktiengesellschaft
InventorMatthias Meyn
Life of this patent
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Abstract
An installation for production of the secondary steel based on scrap in which 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 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.
Claims1
An installation for production of secondary steel based on scrap, comprising a charging device (1);
- a scrap preheater (2) located downstream of the charging device (1);
- a smelting unit (3) for melting scrap and located downstream of the preheater (2);
- a reheating device (4);
- a conduit connecting the reheating device (4) with the smelting unit (3) for feeding a process gas generated in the smelting unit (3) directly into the reheating device (4) for reheating the process gas therein;
- a heat exchanger (5) located downstream of the reheating device (4) for cooling the reheated process gas and for heating fresh gas which is fed in the preheater (2);
- a dedusting installation (8) located downstream of the heat exchanger (5) for dedusting the cooled process gas;
- and an adsorbtion device (7) located downstream of the preheater (2) and upstream of the reheating (4) for freeing a warm gas that leaves the preheater (2) free from harmful material and for feeding a gas freed from harmful material to the reheating device (4).
Dependencies are inferred from the claim text.