F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 3/10 (2006.01) C21C 5/52 (2006.01) C21C 7/068 (2006.01) C22B 9/187 (2006.01) F27B 3/22 (2006.01)
Patent
CA 2449774
A method and an apparatus for advantageously introducing a flame and a high velocity oxidizing gas into a furnace for metal melting, refining and processing, particularly steel making in an electric arc furnace. The steel making process of an electric arc furnace is made more efficient by shortening the time of the scrap melting phase and introducing an effective high velocity oxidizing gas stream into the process sooner to decarburize the melted metal. In one implementation of an apparatus, improved efficiency is obtained by mounting a fixed burner/lance closer to the hot face of the furnace refractory at an effective injection angle. This mounting technique shortens the distance that the flame of the burner has to melt through the scrap to clear a path to the molten metal and shortens the distance the high velocity oxygen from the lance travels to the slag-metal interface thereby increasing its penetrating power. The method additionally includes supplying a plurality of reaction zones with the high velocity oxidizing gas to decarburize the melted metal. The plurality of reaction zones increases the surface area available for the reaction thereby allowing a more rapid rate of decarburization and a more homogenous metal bath. The reaction zones are supplied with the high velocity oxidizing gas according to an oxygen supply profile which is related to the carbon content of the metal bath. In this manner an optimal amount of oxygen can be introduced into the metal bath to shorten the decarburization process without producing excessive oxidation of the metal bath and excessive free oxygen in the furnace.
L'objectif de l'invention est d'accroître l'efficacité d'un processus de fabrication d'acier d'un four électrique à arc(15), par réduction du temps de la phase de fusion de déchets (13) et par introduction d'un écoulement de gaz oxydant à grande vitesse plus tôt dans le processus afin de décarburer le métal fondu (18). A cet effet, on monte un ensemble brûleur-lance (10) fixe afin de raccourcir la distance que doit parcourir la flamme du brûleur pour faire fondre entièrement les déchets (13), et pour raccourcir la distance parcourue par l'oxygène projeté à grande vitesse de la lance (10) pour parvenir jusqu'à l'interface laitier-métal. De plus, on achemine le gaz oxydant à grande vitesse à une pluralité de zones de réaction pour décarburer le métal fondu (18). On peut introduire une quantité optimale d'oxygène dans le bain métallique (18) afin de raccourcir le processus de décarburation sans production d'oxydation excessive du bain métallique (18) ni production excessive d'oxygène libre dans le four (15)
Process Technology International Inc.
Teitelbaum & Maclean
LandOfFree
Method for melting and decarburization of iron carbon melts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for melting and decarburization of iron carbon melts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for melting and decarburization of iron carbon melts will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1818519