C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
C21C 5/52 (2006.01) F27B 3/22 (2006.01) C21C 5/46 (2006.01)
Patent
CA 2280723
The invention relates to a method for positioning the mouth of a consumable lance designed to transport gases and/or solid substances in a metallurgical vessel filled with liquid metal, specially steel. Said method comprises the following steps: a) the lance is guided along a plane that is substantially tangent to the furnace vessel above the liquid level of the metal located in the vessel; b) the mouth area of the lance is bent inwards into the vessel in a given radius in order to bring the mouth of the lance into a fan-shaped position; and c) the lance is pushed through the sidewall of the furnace vessel inside the furnace to reach and/or to maintain the desired position of the lance mouth. The invention also relates to a device for the implementation of said method.
L'invention concerne un procédé permettant de positionner l'embouchure d'une lance consommable, conçue pour l'amenée de substances gazeuses et/ou solides, dans une cuve métallurgique remplie de métal liquide, notamment d'acier. Selon ledit procédé: a) la lance est guidée sensiblement tangentiellement par rapport à l'enveloppe du four, dans un plan situé au-dessus du niveau du métal à l'état liquide se trouvant dans la cuve, b) la lance, dans la zone de son embouchure, est cintrée en direction de l'intérieur de la cuve, selon un rayon prédéterminable, pour permettre un positionnement en éventail de l'embouchure de lance, et c) la lance est repoussée par la paroi latérale de l'enveloppe du four, à l'intérieur du four, pour que son embouchure atteigne et/ou conserve la position souhaitée. L'invention concerne en outre un dispositif permettant la mise en oeuvre de ce procédé.
Fetherstonhaugh & Co.
Mannesmann Aktiengesellschaft
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