EP0055956A1 - Blowing lance for injecting an oxidising gas, especially oxygen, for treating metal melts - Google Patents
Blowing lance for injecting an oxidising gas, especially oxygen, for treating metal melts Download PDFInfo
- Publication number
- EP0055956A1 EP0055956A1 EP81402009A EP81402009A EP0055956A1 EP 0055956 A1 EP0055956 A1 EP 0055956A1 EP 81402009 A EP81402009 A EP 81402009A EP 81402009 A EP81402009 A EP 81402009A EP 0055956 A1 EP0055956 A1 EP 0055956A1
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- European Patent Office
- Prior art keywords
- blowing
- bath
- lance
- gas
- nose
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
Definitions
- the present invention relates to a lance for blowing oxidizing gas, in particular oxygen, intended to be placed above a bath of molten metal in J J - crucible for metallurgical treatment, in particular above of a cast iron bath for refining it into steel.
- oxidizing gas in particular oxygen
- the invention relates to lances the nose of which comprises, in addition to the usual main openings opening onto the front face of the nozzle and serving for blowing oxygen in the form of jets with strong impulse for refining properly said (oxidation of the impurities in the metal bath), additional (or secondary) openings for blowing a stream of oxygen at low speed intended to improve the secondary combustion rate of the refining gases.
- the "nose" of the lance constitutes the end through which the refining oxygen exits in the direction of the bath.
- the "nose” is a hollow piece of copper, attached to the end of the lance body.
- front face means the part of the nose turned opposite the metal bath contained in the crucible.
- the secondary combustion rate reflects the proportion of C0 2 in the reaction gases, this C0 2 being obtained by oxidation of the CO which is released from the metal bath following decarburization of the latter by oxygen d refining.
- Multipurpose lances of this type already exist. However, progress is still possible, both in terms of increasing the secondary combustion of the reaction gases and the durability of the lance noses. These are the aims of the present invention.
- the subject of the invention is a lance for blowing oxidizing gas, in particular oxygen, for refining molten metals, in particular a cast iron bath
- the lance nose of which comprises two categories of '' openings: main openings opening onto the front face of the nose and serving for the blowing of oxygen with high impulse and at least one additional opening for blowing a current of oxygen at low speed, lance characterized in that the annex opening consists of several slots placed at a distance in the extension of the others in an annular assembly configuration surrounding at a distance, counted edge to edge, between 2 and 20 cm approximately, the main opening or the group formed by the main openings, and in that said slots open onto the front face of the nose.
- the secondary openings are not in the form of circular orifices, but on the contrary in the form of more or less elongated slots, arranged annularly around the main openings, one after the other.
- the oxygen stream (s) which create the necessary oxidizing atmosphere must be, from the outset, that is to say as soon as possible after leaving the lance. , not confined in jets located on the axis of the openings, but on the contrary diffused laterally as widely as possible.
- the jets then meet at a short distance from the lance to quickly form a conical gas layer, centered on the nose of the lance and which encircles the main jets by covering the metal bath from a distance. Under these conditions, an oxygen screen is formed above it that the CO emerging from the bath must pass through.
- the gas flows favorably are modified against the lance nose, so that the phenomena of wear by recirculation of the hot gases are considerably reduced.
- the slits are placed too far, that is to say more than 20 cm approximately, they have practically no more influence on the aerodynamics in the vicinity of the main jets of oxygen.
- the secondary slits should not however be placed on the lateral flank of the nose because otherwise, the desired effect is not obtained.
- FIGS. 1 and 2 schematically represent a lance nose according to the invention seen from below, that is to say seen of the metal bath to be treated
- FIG. 3 is a view in vertical section along the axial plane AA of FIG. 2.
- the front face of the lance nose 2 This face, of substantially planar shape, has in its central part three main orifices 3 for blowing jets of oxygen with strong impulse (refining oxygen ).
- openings are provided for the outlet of the oxygen pulse streams, intended to form a conical sheet continuous surrounding the main jets and covering the surface of the metal bath to be refined.
- these additional openings can have numerous design variants, going from a configuration in small multiple slots 6 (FIG. 2) practically rectilinear, passing through configurations with slots in a more or less elongated arc, such as 5 ( Figure 1).
- the gaseous screen of conical shape sought can be produced from a succession of spaced apart slots ( Figures 1 and 2).
- the advantage of this embodiment is to be able to provide between the slots, small bridges 7 which facilitate, in terms of technological development of a cooling water circuit inside the lance nose.
- the short sides of the slots have been chamfered. These chamfers are clearly visible at 18 in FIG. 2.
- Figure 3 shows the lance nose 2 in vertical section as mounted at the lower end of the lance body, which is constituted in the usual way by three concentric tubes 8, 9 and 10.
- the nose 2 is a hollow piece of copper, molded so as to provide central passages 11 which open on the front face 1 through the openings 3 already mentioned. This part is then drilled by machining and copper barrels 12 are placed in the holes thus produced.
- These guns have a passage section 13 of oblong shape in the direction perpendicular to the plane of the figure and open on the front face 1 through the slots 6.
- An internal partition 14 which can be attached or molded from the original with the nose, divides the interior volume of the nose into two compartments, interior 15 and exterior 16, communicating with each other by annular passages 17 formed around the main passages 11. In this way, a sealed cooling water circuit is created inside the nose which effectively irrigates the entire front face 1.
- the water circulation is indicated by arrows.
- the invention is of general application to oxygen from metal fuel baths contained in a metallurgical vessel.
- it is applied in conjunction with an operation for stirring the bath obtained by blowing in stirring gas (neutral or possibly oxidizing gas) through nozzles or air-tight refractory elements incorporated into the wall of the container, at a lower level. to that of the bath, and more generally, in the bottom of the container.
- stirring gas neutral or possibly oxidizing gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
- Endoscopes (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Furnace Details (AREA)
Abstract
Description
La présente invention concerne une lance de soufflage de gaz oxydant, notamment d'oxygène, destinée à être placée au-dessus d'un bain de métal en fusion dans JJ- creuset en vue d'un traitement métallurgique, en particulier au-dessus d'un bain de fonte en vue de son affinage en acier.The present invention relates to a lance for blowing oxidizing gas, in particular oxygen, intended to be placed above a bath of molten metal in J J - crucible for metallurgical treatment, in particular above of a cast iron bath for refining it into steel.
Plus précisément, l'invention se rapporte aux lances dont le nez comporte, en plus des ouvertures principales habituelles débouchant sur la face frontale de l'embout et servant pour le soufflage d'oxygène sous forme de jets à forte impulsion pour l'affinage proprement dit (oxydation des impuretés du bain métallique), des ouvertures annexes (ou secondaires) pour le soufflage d'un courant d'oxygène à faible vitesse destiné à améliorer le taux de combustion secondaire des gaz d'affinage.More specifically, the invention relates to lances the nose of which comprises, in addition to the usual main openings opening onto the front face of the nozzle and serving for blowing oxygen in the form of jets with strong impulse for refining properly said (oxidation of the impurities in the metal bath), additional (or secondary) openings for blowing a stream of oxygen at low speed intended to improve the secondary combustion rate of the refining gases.
On rappelle que le "nez" de la lance constitue l'extrémité par laquelle sort l'oxygène d'affinage en direction du bain. En général, le "nez" est une pièce creuse en cuivre, rapportée en bout du corps de lance.It is recalled that the "nose" of the lance constitutes the end through which the refining oxygen exits in the direction of the bath. In general, the "nose" is a hollow piece of copper, attached to the end of the lance body.
On rappelle également que l'on entend par "face frontale" la partie du nez tournée en regard du bain métallique contenu dans le creuset.It is also recalled that the term "front face" means the part of the nose turned opposite the metal bath contained in the crucible.
Il est rappelé par ailleurs que le taux de combustion secondaire traduit la proportion de C02 dans les gaz de réaction, ce C02 étant obtenu par oxydation du CO qui se dégage du bain métallique suite à la décarburation de ce dernier par l'oxygène d'affinage.It is also recalled that the secondary combustion rate reflects the proportion of C0 2 in the reaction gases, this C0 2 being obtained by oxidation of the CO which is released from the metal bath following decarburization of the latter by oxygen d refining.
Des lances polyvalentes de ce type existent déjà. Toutefois, des progrès sont encore possibles, tant en ce qui concerne l'augmentation de la combustion secondaire des gaz de réaction que la durabilité des nez de lance. Tels sont les buts de la présente invention.Multipurpose lances of this type already exist. However, progress is still possible, both in terms of increasing the secondary combustion of the reaction gases and the durability of the lance noses. These are the aims of the present invention.
A cet effet, l'invention a pour objet une lance de soufflage de gaz oxydant, notamment d'oxygène, pour l'affinage des métaux en fusion, en particulier d'un bain de fonte, dont le nez de lance comporte deux catégories d'ouvertures : des ouvertures principales débouchant sur la face frontale du nez et servant pour l'insufflation d'oxygène à forte impulsion et au moins une ouverture annexe pour le soufflage d'un courant d'oxygène à faible vitesse, lance caractérisée en ce que l'ouverture annexe est constituée par plusieurs fentes placées à distance les unes dans le prolongement des autres selon une configuration d'ensemble annulaire entourant à une distance, comptée bord à bord, comprise entre 2 et 20 cm environ, l'ouverture principale ou le groupe formé par les ouvertures principales, et en ce que lesdites fentes débouchent sur la face frontale du nez.To this end, the subject of the invention is a lance for blowing oxidizing gas, in particular oxygen, for refining molten metals, in particular a cast iron bath, the lance nose of which comprises two categories of '' openings: main openings opening onto the front face of the nose and serving for the blowing of oxygen with high impulse and at least one additional opening for blowing a current of oxygen at low speed, lance characterized in that the annex opening consists of several slots placed at a distance in the extension of the others in an annular assembly configuration surrounding at a distance, counted edge to edge, between 2 and 20 cm approximately, the main opening or the group formed by the main openings, and in that said slots open onto the front face of the nose.
L'idée-mère à la base de l'invention consiste, comme on l'aura sans doute déjà compris, à créer dès la sortie de lance, ou du moins le plus tôt possible après la sortie, une nappe continue d'oxygène qui s'épanouit en forme de "parapluie" autour des jets principaux en se dirigeant vers le bain métallique.The original idea at the base of the invention, as it will probably already understand, create straight from launch, or at least most t o t possible after release, a continuous sheet of oxygen which flourishes in the form of an "umbrella" around the main jets on its way to the metal bath.
Pour cela, il est judicieux que les ouvertures secondaires se présentent non pas sous la forme d'orifices circulaires, mais au contraire sous la forme de fentes plus ou moins allongées, disposées annulairement autour des ouvertures principales, les unes à la suite des autres.For this, it is advisable that the secondary openings are not in the form of circular orifices, but on the contrary in the form of more or less elongated slots, arranged annularly around the main openings, one after the other.
L'invention résulte des considérations essentielles suivantes :The invention results from the following essential considerations:
Pour obtenir un taux de combustion secondaire élevé, il faut que le ou les courants d'oxygène qui créent l'atmosphère oxydante nécessaire soient, dès l'origine, c'est-à-dire le plus tôt possible après la sortie de la lance, non pas confinés en jets localisés sur l'axe des ouvertures, mais au contraire diffusés latéralement le plus largement possible. Les jets se réunissent alors à faible distance de la lance pour former rapidement une nappe gazeuse conique, centrée sur le nez de la lance et qui encercle les jets principaux en recouvrant le bain métallique à distance. Dans ces conditions, on forme au-dessus de celui-ci un écran d'oxygène que le CO se dégageant du bain doit obligatoirement traverser.To obtain a high secondary combustion rate, the oxygen stream (s) which create the necessary oxidizing atmosphere must be, from the outset, that is to say as soon as possible after leaving the lance. , not confined in jets located on the axis of the openings, but on the contrary diffused laterally as widely as possible. The jets then meet at a short distance from the lance to quickly form a conical gas layer, centered on the nose of the lance and which encircles the main jets by covering the metal bath from a distance. Under these conditions, an oxygen screen is formed above it that the CO emerging from the bath must pass through.
Par ailleurs, il a pu être constaté que pratiquement tous les nez de lance connus s'usent préférentiellement entre les ouvertures principales et ceci malgré les efforts réalisés pour améliorer l'efficacité de leur refroidissement par circulation d'eau interne. Grâce à leurs travaux de recherche, les inventeurs ont pu établir que cette usure, responsable d'une mise au rebut précoce des nez de lance, avait pour cause prépondérante des phénomènes d'aspiration provoquant des recirculations gazeuses autour des jets d'oxygène à forte impulsion. Ainsi, les gaz très chauds présents dans l'atmosphère au-dessus du bain et chargés en particules solides sont localement aspirés vers la lance et viennent éroder la surface du nez autour des orifices principaux d'oxygène et en particulier, les zones situées entre ces orifices, puisque c'est là que s'additionnent les effets de recircula- tioh propres à plusieurs jets principaux voisins.Furthermore, it has been found that practically all known lance noses wear out preferentially between the main openings and this despite the efforts made to improve the efficiency of their cooling by circulation of internal water. Thanks to their research work, the inventors were able to establish that this wear, responsible for an early scrapping of the lance noses, was mainly due to suction phenomena causing gas recirculations around the high-oxygen jets. impulse. Thus, the very hot gases present in the atmosphere above the bath and loaded with solid particles are locally sucked towards the lance and come to erode the surface of the nose around the main oxygen orifices and in particular, the zones located between these orifices, since this is where the effects of recirculation specific to several neighboring main jets add up.
Grâce à la présence d'orifices annexes en forme de fentes, conformément à l'invention, on modifie favorablement les écoulements,gazeux contre le nez de lance, de sorte que les phénomènes d'usure par recirculation des gaz chauds sont considérablement réduits.Thanks to the presence of auxiliary orifices in the form of slots, in accordance with the invention, the gas flows favorably are modified against the lance nose, so that the phenomena of wear by recirculation of the hot gases are considerably reduced.
En conformité avec l'invention, un tel résultat est atteint lorsque les fentes sont éloignées des ouvertures principales d'une distance comprise entre 2 et 20 cm environ, cette distance étant comptée de bord à bord, car la section des orifices concernés intervient peu.In accordance with the invention, such a result is achieved when the slots are spaced from the main openings by a distance comprised between 2 and 20 cm approximately, this distance being counted from edge to edge, because the section of the orifices concerned does not intervene much.
Si les fentes sont localisées trop près (à moins de 2 cm approximativement), la recirculation gazeuse autour des jets principaux est certes supprimée, mais les courants d'oxygène à la sortie des fentes sont mis en accélération par l'effet d'entraînement des jets principaux, de sorte, qu'en définitive, celà revient à déplacer le problème de l'usure autour des fentes secondaires. De plus, cette mise en accélération est opposée à la diffusion latérale des courants secondaires, si bien que, dans le meilleur des cas, la formation d'une nappe conique homogène d'oxygène au-dessus du bain est retardée et la combustion secondaire diminuée.If the slots are located too close (less than 2 cm approximately), the gas recirculation around the main jets is certainly suppressed, but the oxygen currents at the outlet of the slots are accelerated by the entrainment effect of the main jets, so that ultimately this amounts to moving the problem of wear around the secondary slots. In addition, this acceleration is opposed to the lateral diffusion of the secondary currents, so that, in the best of cases, the formation of a homogeneous conical sheet of oxygen above the bath is delayed and the secondary combustion reduced .
Par contre, si les fentes sont placées trop loin, à savoir à plus de 20 cm environ, elles n'ont pratiquement plus d'influence sur l'aérodynamique au voisinage des jets principaux d'oxygène. Toutefois, les fentes secondaires ne doivent pas pour autant être placées sur le flan latéral du nez car sinon, l'effet recherché n'est pas obtenu.On the other hand, if the slits are placed too far, that is to say more than 20 cm approximately, they have practically no more influence on the aerodynamics in the vicinity of the main jets of oxygen. However, the secondary slits should not however be placed on the lateral flank of the nose because otherwise, the desired effect is not obtained.
On va maintenant illustrer ce qui vient d'être dit à l'aide des planches de dessins annexées sur lesquelles les figures 1 et 2, représentent schématiquement un nez de lance selon l'invention vu du dessous, c'est-à-dire vu du bain de métal à traiter, et la figure 3 est une vue en coupe verticale selon le plan axial AA de la figure 2.We will now illustrate what has just been said with the aid of the attached drawing plates in which FIGS. 1 and 2 schematically represent a lance nose according to the invention seen from below, that is to say seen of the metal bath to be treated, and FIG. 3 is a view in vertical section along the axial plane AA of FIG. 2.
Sur les figures, on voit en 1 la face frontale du nez de lance 2. Cette face, de forme sensiblement plane, présente dans sa partie centrale trois orifices principaux 3 pour le soufflage de jets d'oxygène à forte impulsion (oxygène d'affinage).In the figures, we see at 1 the front face of the
A une distance notée "d" comprise, comme on l'a dit, entre 2 et 20 cm environ du bord des orifices 3, sont ménagées des ouvertures pour la sortie des courants d'oxygène à faible impulsion, destinés à former une nappe conique continue entourant les jets principaux et recouvrant la surface du bain métallique à affiner.At a distance denoted "d" comprised, as has been said, between approximately 2 and 20 cm from the edge of the orifices 3, openings are provided for the outlet of the oxygen pulse streams, intended to form a conical sheet continuous surrounding the main jets and covering the surface of the metal bath to be refined.
En conformité avec l'invention, ces ouvertures annexes peuvent présenter de nombreuses variantes de conception, allant depuis une configuration en petites fentes multiples 6 (figure 2) pratiquement rectilignes, en passant par des configurations à fentes en arc de cercle plus ou moins allongées, telles que 5 (figure 1).In accordance with the invention, these additional openings can have numerous design variants, going from a configuration in small multiple slots 6 (FIG. 2) practically rectilinear, passing through configurations with slots in a more or less elongated arc, such as 5 (Figure 1).
Il doit être souligné en effet que l'écran gazeux de forme conique recherché peut être réalisé à partir d'une succession de fentes espacées (figures 1 et 2). L'intérêt de cette forme de réalisation est de pouvoir ménager entre les fentes, des petits ponts 7 qui facilitent, au plan technologique, l'aménagement d'un circuit d'eau de refroidissement à l'intérieur du nez de lance. Dans ce cas cependant, il est avantageux de prévoir des fentes à profil divergent dans le sens du soufflage pour permettre une meilleure diffusion latérale des différents courants d'oxygène ; econdaire qui peuvent alors se rejoindre rapidement dès leur sortie des fentes, pour former le plus tôt possible l'écran gazeux uniforme recherché. A cet effet, les petits côtés des fentes ont été chanfreinés. Ces chanfreins sont bien visibles en 18 sur la figure 2.It should be emphasized in fact that the gaseous screen of conical shape sought can be produced from a succession of spaced apart slots (Figures 1 and 2). The advantage of this embodiment is to be able to provide between the slots,
La figure 3 montre le nez de lance 2 en coupe verticale tel que monté à l'extrémité basse du corps de lance, lequel est constitué de la manière habituelle par trois tubes concentriques 8, 9 et 10. Ainsi qu'on peut s'en rendre compte, le nez 2 est une pièce creuse en cuivre, moulée de façon à ménager des passages centraux 11 qui débouchent sur la face frontale 1 par les ouvertures 3 déjà citées. Cette pièce est ensuite percée par usinage et des canons en cuivre 12 sont placés dans les perçages ainsi réalisés. Ces canons présentent une section de passage 13 de forme oblongue dans la direction perpendiculaire au plan de la figure et débouchent en face frontale 1 par les fentes 6.Figure 3 shows the
Un cloisonnage interne 14, qui peut être rapporté ou moulé d'origine avec le nez, partage le volume intérieur du nez en deux compartiments, intérieur 15 et extérieur 16, communiquant entre-eux par des passages annulaires 17 ménagés autour des passages principaux 11. De cette façon, on réalise à l'intérieur du nez un circuit d'eau de refroidissement étanche qui irrigue efficacement toute la face frontale 1. La circulation de l'eau est indiquée par des flèches.An
Bien entendu, l'invention ne se limite pas aux exemples décrits, mais s'étend à de multiples variantes ou équivalents dans la mesure où sont respectées les caractéristiques techniques énoncées dans les revendications jointes.Of course, the invention is not limited to the examples described, but extends to multiple variants or equivalents insofar as the technical characteristics set out in the appended claims are respected.
Par ailleurs, il est clair que la mise en oeuvre pratique de l'invention suppose que des moyens sont prévus qui permettent de différencier les vitesses de soufflage de l'oxygène entre les jets principaux à forte impulsion destinés à l'affinage, et les jets secondaires à plus faible quantité de mouvement destinés à former l'écran gazeux.Furthermore, it is clear that the practical implementation of the invention supposes that means are provided which make it possible to differentiate the oxygen blowing speeds between the main jets with high impulses intended for refining, and the jets secondary to lower momentum intended to form the gas screen.
Ces moyens peuvent être purement constructifs, le calibre'relatif des passages 13 assurant la répartition des débits (figure 3), ou plus élaborés pour permettre des réglages dynamiques et indépendants des flux gazeux à partir, par exemple, de deux alimentations séparées en oxygène et d'un corps de lance à double flux.These means can be purely constructive, the relative caliber of the
D'autre part, l'invention est d'application générale à à l'oxygène de bains métalliques carburés contenus dans un récipient métallurgique. De préférence, elle s'applique conjointement avec une opération de brassage du bain obtenu par une insufflation de gaz de brassage (gaz neutre ou éventuellement oxydant) au travers de tuyères ou d'éléments réfractaires aéroperméables incorporés en paroi du récipient, à un niveau inférieur à celui du bain, et plus généralement, dans le fond du récipient. C'est en effet dans les conditions opératoires précitées que les meilleurs résultats sur le plan de la combustion secondaire ont pu être enregistrés à ce jour par les inventeurs, notamment en raison du fait, semble-t-il, que le brassage pneumatique du bain'par insufflation d'un gaz par le fond est de nature à stabiliser la hauteur de couche du laitier, donc également, la distance séparant l'extrémité de la lance de la surface de laitier.On the other hand, the invention is of general application to oxygen from metal fuel baths contained in a metallurgical vessel. Preferably, it is applied in conjunction with an operation for stirring the bath obtained by blowing in stirring gas (neutral or possibly oxidizing gas) through nozzles or air-tight refractory elements incorporated into the wall of the container, at a lower level. to that of the bath, and more generally, in the bottom of the container. It is indeed under the aforementioned operating conditions that the best results in terms of secondary combustion have been recorded to date by the inventors, in particular due to the fact, it seems, that the pneumatic mixing of the bath 'by blowing a gas from the bottom is likely to stabilize the height of the slag layer, therefore also the distance between the end of the lance and the slag surface.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81402009T ATE28759T1 (en) | 1980-12-22 | 1981-12-16 | LANCE FOR INJECTING AN OXIDIZING GAS, ESPECIALLY OXYGEN, FOR METAL METAL TREATMENT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8027410A FR2496699B1 (en) | 1980-12-22 | 1980-12-22 | BLOWING NOZZLE FOR OXIDIZING GAS, ESPECIALLY OXYGEN, FOR THE TREATMENT OF FUSED METALS |
FR8027410 | 1980-12-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0055956A1 true EP0055956A1 (en) | 1982-07-14 |
EP0055956B1 EP0055956B1 (en) | 1987-08-05 |
Family
ID=9249453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81402009A Expired EP0055956B1 (en) | 1980-12-22 | 1981-12-16 | Blowing lance for injecting an oxidising gas, especially oxygen, for treating metal melts |
Country Status (12)
Country | Link |
---|---|
US (1) | US4396182A (en) |
EP (1) | EP0055956B1 (en) |
JP (1) | JPS57131313A (en) |
AT (1) | ATE28759T1 (en) |
AU (1) | AU541840B2 (en) |
BR (1) | BR8108301A (en) |
CA (1) | CA1178052A (en) |
DE (2) | DE3176342D1 (en) |
ES (1) | ES8302791A1 (en) |
FR (1) | FR2496699B1 (en) |
PT (1) | PT74151B (en) |
ZA (1) | ZA818828B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521167A1 (en) * | 1982-02-10 | 1983-08-12 | Siderurgie Fse Inst Rech | GAS INJECTION LANCE FOR METALLURGICAL CONVERTER |
EP0207656A1 (en) * | 1985-06-10 | 1987-01-07 | Britannia Refined Metals Limited | Recovery of metals from their alloys with lead |
EP0364721A1 (en) * | 1988-09-28 | 1990-04-25 | Arbed S.A. | Refining lance |
GB2230848A (en) * | 1989-04-26 | 1990-10-31 | Insul Co Inc | Applying gas to molten metal |
EP0490099A1 (en) * | 1990-12-10 | 1992-06-17 | Arbed S.A. | Process for controlling the refining of pig iron |
EP0490100A1 (en) * | 1990-12-10 | 1992-06-17 | Arbed S.A. | Blowing lance |
EP0529667A2 (en) * | 1991-08-29 | 1993-03-03 | Praxair Technology, Inc. | Method of high velocity gas injection |
EP0629710A1 (en) * | 1993-06-15 | 1994-12-21 | MANNESMANN Aktiengesellschaft | Process and installation for reduction of ores or prereduced metal-bearing products in molten state |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3509795C1 (en) * | 1985-03-19 | 1986-06-05 | Klöckner CRA Technologie GmbH, 4100 Duisburg | Water-cooled blowing lance for blowing oxygen onto a molten metal |
US5324816A (en) * | 1987-06-22 | 1994-06-28 | Allied-Signal Inc. | Process for improving the properties of polymers |
JP3249816B2 (en) * | 1989-09-29 | 2002-01-21 | オースメルト ピーティーワイ.リミテッド. | Tip submerged injection with shrouded lance |
FR2667928B1 (en) * | 1990-10-16 | 1995-07-28 | Air Liquide | METHOD FOR HEATING A THERMAL ENCLOSURE. |
US5308043A (en) * | 1991-09-20 | 1994-05-03 | Ausmelt Pty. Ltd. | Top submergable lance |
AU647669B2 (en) * | 1991-09-20 | 1994-03-24 | Ausmelt Pty Ltd | Top submergable lance |
US6017380A (en) * | 1995-01-06 | 2000-01-25 | Nippon Steel Corporation | Top-blown refining method in converter featuring excellent decarburization and top-blown lance for converter |
US5681526A (en) * | 1996-04-23 | 1997-10-28 | Usx Corporation | Method and apparatus for post-combustion of gases during the refining of molten metal |
US6217824B1 (en) | 1999-05-20 | 2001-04-17 | Berry Metal Company | Combined forged and cast lance tip assembly |
DE602005015575D1 (en) * | 2004-05-14 | 2009-09-03 | Linde Inc | FINE OF MELT LIQUID METAL |
AT506984B1 (en) * | 2008-06-17 | 2010-06-15 | Siemens Vai Metals Tech Gmbh | OXYGEN BLASLANT WITH PROTECTIVE ELEMENT |
EA026257B1 (en) | 2011-06-30 | 2017-03-31 | Ототек Оюй | Top submerged injecting lances |
CA2844098C (en) | 2011-09-02 | 2016-01-05 | Outotec Oyj | Lances for top submerged injection |
BR112014013142B8 (en) | 2011-11-30 | 2023-05-09 | Outotec Oyj | FLUID COOLED LANCERS FOR TOP SUBMERGED INJECTION |
AU2013204818B2 (en) | 2013-04-12 | 2015-02-19 | Metso Metals Oy | Molten bath temperature measurement for a top submerged lance injection installation |
WO2015056142A1 (en) | 2013-10-16 | 2015-04-23 | Outotec (Finland) Oy | Top submerged injection lance for enhanced heat transfer |
EP3058109B1 (en) | 2013-10-16 | 2017-03-22 | Outotec (Finland) Oy | Top submerged injection lance for enhanced submerged combustion |
JOP20210193A1 (en) | 2019-01-18 | 2023-01-30 | Astrazeneca Ab | Pcsk9 inhibitors and methods of use thereof |
CN114196798B (en) * | 2021-11-23 | 2023-03-28 | 武汉钢铁有限公司 | Single-channel secondary combustion oxygen lance and use method thereof |
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DE845643C (en) * | 1949-09-21 | 1952-08-04 | Oesterr Alpine Montan | Apparatus and method for blowing gases against the surface of molten metal |
US3411716A (en) * | 1966-05-11 | 1968-11-19 | United States Steel Corp | Oxygen lance for steelmaking furnaces |
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US3889933A (en) * | 1974-02-28 | 1975-06-17 | Int Nickel Canada | Metallurgical lance |
LU78906A1 (en) * | 1978-01-19 | 1979-09-06 | Arbed | METHOD AND DEVICE FOR REFINING A METAL BATH |
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FR1424029A (en) * | 1964-01-06 | 1966-01-07 | Union Carbide Corp | Method and apparatus for introducing a stream of process gas into a bath of molten metal |
US3519259A (en) * | 1968-05-06 | 1970-07-07 | Union Carbide Corp | Furnace jet devices |
BE756083A (en) * | 1969-09-11 | 1971-03-15 | Enya Ryosuke | METHOD AND DEVICE FOR THE MANUFACTURE OF FUSION METAL INTENDED TO BE CAST |
US3642060A (en) * | 1970-03-16 | 1972-02-15 | Bethlehem Steel Corp | Water-cooled apparatus |
FR2124088A1 (en) * | 1971-02-04 | 1972-09-22 | G Sojuzny | Steel refining oxygen lance - with helical screening gas nozzles |
US4230274A (en) * | 1978-07-10 | 1980-10-28 | Pullman Berry Company | Lance for removing skulls from steelmaking vessels |
US4301969A (en) * | 1980-02-25 | 1981-11-24 | Sharp Kenneth C | Oxygen lance nozzle |
-
1980
- 1980-12-22 FR FR8027410A patent/FR2496699B1/en not_active Expired
-
1981
- 1981-12-14 US US06/330,770 patent/US4396182A/en not_active Expired - Fee Related
- 1981-12-15 CA CA000392350A patent/CA1178052A/en not_active Expired
- 1981-12-16 DE DE8181402009T patent/DE3176342D1/en not_active Expired
- 1981-12-16 EP EP81402009A patent/EP0055956B1/en not_active Expired
- 1981-12-16 AT AT81402009T patent/ATE28759T1/en not_active IP Right Cessation
- 1981-12-16 DE DE198181402009T patent/DE55956T1/en active Pending
- 1981-12-18 PT PT74151A patent/PT74151B/en unknown
- 1981-12-21 BR BR8108301A patent/BR8108301A/en unknown
- 1981-12-21 ZA ZA818828A patent/ZA818828B/en unknown
- 1981-12-22 ES ES508277A patent/ES8302791A1/en not_active Expired
- 1981-12-22 AU AU78776/81A patent/AU541840B2/en not_active Ceased
- 1981-12-22 JP JP56207963A patent/JPS57131313A/en active Pending
Patent Citations (5)
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DE845643C (en) * | 1949-09-21 | 1952-08-04 | Oesterr Alpine Montan | Apparatus and method for blowing gases against the surface of molten metal |
US3411716A (en) * | 1966-05-11 | 1968-11-19 | United States Steel Corp | Oxygen lance for steelmaking furnaces |
LU56138A1 (en) * | 1968-05-24 | 1970-01-14 | ||
US3889933A (en) * | 1974-02-28 | 1975-06-17 | Int Nickel Canada | Metallurgical lance |
LU78906A1 (en) * | 1978-01-19 | 1979-09-06 | Arbed | METHOD AND DEVICE FOR REFINING A METAL BATH |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521167A1 (en) * | 1982-02-10 | 1983-08-12 | Siderurgie Fse Inst Rech | GAS INJECTION LANCE FOR METALLURGICAL CONVERTER |
EP0086694A1 (en) * | 1982-02-10 | 1983-08-24 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Top-blown lance for a metallurgical converter |
EP0207656A1 (en) * | 1985-06-10 | 1987-01-07 | Britannia Refined Metals Limited | Recovery of metals from their alloys with lead |
EP0364721A1 (en) * | 1988-09-28 | 1990-04-25 | Arbed S.A. | Refining lance |
GB2230848A (en) * | 1989-04-26 | 1990-10-31 | Insul Co Inc | Applying gas to molten metal |
GB2230848B (en) * | 1989-04-26 | 1993-01-13 | Insul Co Inc | Lance for use in treating a bath of molten metal |
EP0490099A1 (en) * | 1990-12-10 | 1992-06-17 | Arbed S.A. | Process for controlling the refining of pig iron |
EP0490100A1 (en) * | 1990-12-10 | 1992-06-17 | Arbed S.A. | Blowing lance |
EP0529667A2 (en) * | 1991-08-29 | 1993-03-03 | Praxair Technology, Inc. | Method of high velocity gas injection |
EP0529667A3 (en) * | 1991-08-29 | 1993-06-09 | Praxair Technology, Inc. | Method and apparatus for high velocity gas injection |
US5295816A (en) * | 1991-08-29 | 1994-03-22 | Praxair Technology, Inc. | Method for high velocity gas injection |
EP0629710A1 (en) * | 1993-06-15 | 1994-12-21 | MANNESMANN Aktiengesellschaft | Process and installation for reduction of ores or prereduced metal-bearing products in molten state |
Also Published As
Publication number | Publication date |
---|---|
AU541840B2 (en) | 1985-01-24 |
BR8108301A (en) | 1982-07-06 |
FR2496699B1 (en) | 1985-06-21 |
ES508277A0 (en) | 1982-12-01 |
PT74151B (en) | 1983-06-28 |
DE55956T1 (en) | 1983-01-20 |
ATE28759T1 (en) | 1987-08-15 |
JPS57131313A (en) | 1982-08-14 |
FR2496699A1 (en) | 1982-06-25 |
PT74151A (en) | 1982-01-01 |
EP0055956B1 (en) | 1987-08-05 |
ES8302791A1 (en) | 1982-12-01 |
AU7877681A (en) | 1982-07-01 |
DE3176342D1 (en) | 1987-09-10 |
CA1178052A (en) | 1984-11-20 |
US4396182A (en) | 1983-08-02 |
ZA818828B (en) | 1982-11-24 |
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