C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
C21B 5/00 (2006.01) C21B 13/14 (2006.01)
Patent
CA 2408720
The invention relates to a process for producing pig iron or liquid primary steel products in a blast furnace, CO2 being substantially removed from at least a partial stream of a top gas emerging from a reduction shaft furnace (1), and this partial stream if appropriate being heated and being introduced into the blast furnace as reduction gas, and to a plant for carrying out this process, the top gas being introduced into the lower region of the blast-furnace shaft. This measure results in an improved energy balance and improved process management compared to the prior art.
L'invention concerne un procédé de production de fonte brute ou de produits semi-finis en acier fluide dans un haut-fourneau. Au moins un courant partiel d'un gaz de haut fourneau sortant d'un fourneau à cuve de réduction (1) est largement libéré du CO¿2?, éventuellement chauffé, et introduit dans le haut-fourneau comme gaz de réduction. L'invention concerne également une installation permettant de réaliser ce procédé, le gaz de haut fourneau étant introduit dans la zone inférieure de la cuve du haut-fourneau. Par rapport à l'état de la technique, cette mesure permet d'obtenir un meilleur bilan énergétique et une meilleure conduite de processus.
Kepplinger Leopold Werner
Mizelli Herbert
Wurm Johann
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Voest-Alpine Industrieanlagenbau Gmbh & Co
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