EP0234388B1 - Lance for blowing oxygen - Google Patents
Lance for blowing oxygen Download PDFInfo
- Publication number
- EP0234388B1 EP0234388B1 EP87101776A EP87101776A EP0234388B1 EP 0234388 B1 EP0234388 B1 EP 0234388B1 EP 87101776 A EP87101776 A EP 87101776A EP 87101776 A EP87101776 A EP 87101776A EP 0234388 B1 EP0234388 B1 EP 0234388B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lance
- mouth
- chamber
- jet
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 24
- 239000001301 oxygen Substances 0.000 title claims abstract description 24
- 238000007664 blowing Methods 0.000 title description 6
- 239000007789 gas Substances 0.000 claims abstract description 11
- 238000007670 refining Methods 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910001021 Ferroalloy Inorganic materials 0.000 claims abstract description 3
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 235000014443 Pyrus communis Nutrition 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 3
- 241000282461 Canis lupus Species 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention relates to a blowing lance for refining metals of ferroalloys respectively by blowing oxygen from above.
- An oxygen blowing lance normally comprises at least one vertical nozzle intended to supply an oxygen jet for the refining proper. It can also comprise at least one lateral nozzle, intended to provide an oxygen jet, softer than the vertical jet, for burning the carbon monoxide formed during the refining and creating an excess of thermal energy (see eg the patent LU 78 906) as well as possibly a nozzle guiding solid materials suspended in a carrier gas (see for example the patent LU 84 433).
- the vertical jet strikes the surface of the bath and must have a sufficient impulse to pass through the slag layer or to push it back, in order to reach the metal; it is also necessary for the jet to cause mixing of the slag with the bath, to accelerate the metallurgical reactions between these two liquid phases.
- the object of the present invention is to design a lance capable of providing an airship jet of gas, in which the mobile mechanical means are reduced to a minimum to avoid the problems stated above.
- an oxygen jet is blown through a vertical nozzle, this jet will have a vertical direction and will behave in a conventional manner, well known by steelmakers. However, if oxygen, or any other gas, is blown at the same time through a lateral nozzle, an overpressure zone is created in the chamber which extends from the mouth of the lateral nozzle. at the outlet of the head and which causes a deflection of the jet leaving the orifice of the head. It is understood that the lateral nozzles will be provided with gas flow control valves, in order to create inside the chamber conditions necessary to form the jet, both from the point of view of its impulse and from the point of view. view of its direction, or more precisely its angle of deviation from the vertical.
- a major advantage achievable using the invention lies in the fact that it makes it possible to deflect the jet of oxygen and to move the point of impact on the surface of the bath, at will and at variable speed, without interrupting the blowing. This results in virtual enlargement of the impact zone and more pronounced mixing of the metal with the slag on the surface of the bath. Besides the favorable effects on the refining process, the displacement of the point of impact also causes a widening of the afterburning zone - see on this subject the patent LU 81 207-.
- Another advantage offered by the invention resides in a more extensive distribution of the heat which reigns at the point of impact, so that on one side the temperature of the bath can rise and the other side the zone of intense heat, where there is the risk of nitriding, can be moved and thereby diluted.
- the vertical nozzle 4 guides a jet of refining oxygen 3, of which the physical properties are determined by the pressure of the oxygen source, the flow control valve and the profile and dimensioning of the oxygen conduits from the source to the chamber 6 located in the extension of the nozzle 4.
- This chamber 6, which connects the nozzle 4 to the mouth 7 of the lance, has a length of around 30 cm; it would only have a negligible influence on the dynamics of the oxygen jet 3 (slight increase in speed, function of the mouth section 7) if there were, in the vicinity of the place 9 where the nozzle 4 flares into chamber 6, the mouth 5 of several lateral conduits 10.
- Chamber 6 has substantially the shape of a pear, truncated on the upper and lower sides.
- the section of the mouth 7 is comparable to that of the place 9 where the chamber is connected to the nozzle 4.
- the profile of the flaring near the nozzle 4 is not very critical but must be pronounced enough to achieve over a distance from a few tens of cm a progressive deviation of the jet to the desired deviation A.
- Approaching the mouth 7, the angle taken by the interior profile of the chamber with the longitudinal axis BB ⁇ of the nozzle 4 tends towards the desired deflection angle A.
- the interior profile of the chamber 6 is produced taking into account the distance from the mouth 7 - surface of the bath as well as the dimensions of the converter or, more precisely, the horizontal section of the converter at the normal height of the level of the bath.
- the chamber 6 can be of revolution where present opposite each mouth 5 of the grooves in which the deflected jet 3 is housed. These grooves can have a depth such that they surround a third of the section of the jet 3 and possibly have a spiral arrangement around the axis BB ⁇ .
- the lance body is the seat, not only of a reaction force which passes through the axis BB ⁇ , but also of a torque.
- the operation of the device is as follows: At the start only the nozzle 4 is connected to the oxygen source, the various valves 11 are closed; a hard, vertical jet of primary oxygen hits the surface of the bath. As soon as a deflection of the jet is desired, one of the valves 11 is actuated and a gas jet enters the chamber 6, and creates a hatched overpressure zone 8. This overpressure zone causes a deflection of the jet 3 which bears, while keeping its shape, against the wall of the chamber which is opposite the mouth 5 which creates the suppression zone 8.
- One possible embodiment provides for controlling the different valves 11 according to the progress of the refining process using a computer.
- Fig.2 shows schematically the different points of impact achievable on the surface of the metal bath, thanks to a lance head comprising a vertical nozzle whose jet can be deflected by eight lateral conduits 10 as described above.
- Point J0 is achieved by keeping the eight valves 11 closed. By opening one after the other one of the valves 11, it is possible to move the jet to achieve for example the point of impact J10, then J20 etc.
- the lance head makes it possible to direct the jet towards each of the impact points represented, in the direction of the arrows and it is imagined that it is possible to pre-establish programs for scanning the surface, according to empirical diagrams, or proceed according to a given situation.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Nozzles (AREA)
- Arc Welding In General (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
L'invention concerne une lance de soufflage pour l'affinage de métaux respectivement de ferroalliages par soufflage d'oxygène par le haut.The invention relates to a blowing lance for refining metals of ferroalloys respectively by blowing oxygen from above.
Une lance de soufflage d'oxygène comprend normalement au moins une tuyère verticale destinée à fournir un jet d'oxygène pour l'affinage proprement dit. Elle peut en plus comprendre au moins une tuyère latérale, destinée à fournir un jet d'oxygène, plus mou que le jet vertical, pour brûler le monoxyde de carbone formé au cours de l'affinage et créer un surplus d'énergie thermique (voir p.ex. le brevet LU 78 906) ainsi qu'éventuellement une tuyère guidant des matières solides suspendues dans un gaz porteur (voir p. ex. le brevet LU 84 433).An oxygen blowing lance normally comprises at least one vertical nozzle intended to supply an oxygen jet for the refining proper. It can also comprise at least one lateral nozzle, intended to provide an oxygen jet, softer than the vertical jet, for burning the carbon monoxide formed during the refining and creating an excess of thermal energy (see eg the patent LU 78 906) as well as possibly a nozzle guiding solid materials suspended in a carrier gas (see for example the patent LU 84 433).
Le jet vertical frappe la surface du bain et doit présenter une impulsion suffisante pour traverser la couche de scorie ou pour la refouler, en vue d'atteindre le métal; il est également nécessaire que le jet provoque un brassage de la scorie avec le bain, pour accélérer les réactions métallurgiques entre ces deux phases liquides.The vertical jet strikes the surface of the bath and must have a sufficient impulse to pass through the slag layer or to push it back, in order to reach the metal; it is also necessary for the jet to cause mixing of the slag with the bath, to accelerate the metallurgical reactions between these two liquid phases.
Il est bien entendu que le point d'impact du jet sur la surface du bain est fixe et se situe plus ou moins au centre de cette surface. On sait depuis longtemps qu'il serait avantageux de pouvoir déplacer ce point d'impact d'une manière contrôlée, et ceci afin de mieux distribuer la chaleur intense qui règne au point d'impact et d'intensifier l'effet de brassage. Ainsi on a proposé des lances dont l'axe principal est incliné et où la lance entière peut osciller autour de la verticale. On a également conçu des têtes de lance dont l'embouchure présente des moyens mécaniques capables de dévier le jet d'oxygène, les dits moyens étant eux-mêmes mobiles et télécommandés.It is understood that the point of impact of the jet on the surface of the bath is fixed and is located more or less in the center of this surface. We have known for a long time that it would be advantageous to be able to move this point of impact in a controlled manner, and this in order to better distribute the intense heat which reigns at the point of impact and to intensify the stirring effect. So we proposed spears whose main axis is inclined and where the entire lance can oscillate around the vertical. Lance heads have also been designed, the mouth of which has mechanical means capable of deflecting the oxygen jet, the said means being themselves mobile and remote-controlled.
Le désavantage commun à toutes ces solutions proposées, réside dans la nécessité de faire fonctionner des moyens mécaniques qui sont tous exposés à une chaleur intense, à des poussières en grandes quantités et à l'action de l'oxygène, si bien que l'on rencontre dans la presque totalité des aciéries des lances de soufflage conventionnelles à jet principal unidirectionnel.The disadvantage common to all these proposed solutions lies in the need to operate mechanical means which are all exposed to intense heat, dust in large quantities and the action of oxygen, so that one found in almost all steelworks with conventional unidirectional main jet blowing lances.
Le but de la présente invention est de concevoir une lance capable de fournir un jet de gaz dirigeable, dans laquelle les moyens mécaniques mobiles sont réduits à un minimum pour éviter les problèmes énoncés plus haut.The object of the present invention is to design a lance capable of providing an airship jet of gas, in which the mobile mechanical means are reduced to a minimum to avoid the problems stated above.
Ce but est atteint grâce à la lance telle qu'elle est caractérisée dans la revendication 1. Des variations d'exécution préférentielles sont décrites dans les sous-revendications.This object is achieved thanks to the lance as it is characterized in
Si l'on souffle à travers une tuyère verticale un jet d'oxygène, ce jet aura une direction verticale et se comportera de manière conventionnelle, bien connue par les aciéristes. Or, si l'on souffle en même temps de l'oxygène, ou n'importe quel autre gaz, par un tuyère latérale, il est créé dans la chambre une zone de surpression qui s'étend depuis l'embouchure de la tuyère latérale à la sortie de la tête et qui provoque une déviation du jet sortant de l'orifice de la tête. Il est bien entendu que l'on munira les tuyères latérales de vannes de réglage du débit de gaz, afin de créer à l'intérieur de la chambre des conditions nécessaires pour former le jet, tant du point de vue de son impulsion que du point de vue de sa direction, ou plus précisément de son angle de déviation par rapport à la verticale.If an oxygen jet is blown through a vertical nozzle, this jet will have a vertical direction and will behave in a conventional manner, well known by steelmakers. However, if oxygen, or any other gas, is blown at the same time through a lateral nozzle, an overpressure zone is created in the chamber which extends from the mouth of the lateral nozzle. at the outlet of the head and which causes a deflection of the jet leaving the orifice of the head. It is understood that the lateral nozzles will be provided with gas flow control valves, in order to create inside the chamber conditions necessary to form the jet, both from the point of view of its impulse and from the point of view. view of its direction, or more precisely its angle of deviation from the vertical.
Un avantage majeur réalisable à l'aide de l'invention réside dans le fait qu'elle permet de dévier le jet d'oxygène et de déplacer le point d'impact sur la surface du bain, à volonté et à vitesse variable, sans interruption du soufflage. Il en résulte en élargissement virtuel de la zone d'impact et un brassage plus prononcé du métal avec la scorie en surface du bain. A côté des effets favorables sur le processus d'affinage, le déplacement du point d'impact provoque également un élargissement de la zone de postcombustion - voir à ce sujet le brevet LU 81 207-. Un autre avantage offert par l'invention réside dans une distribution plus poussée de la chaleur qui règne au point d'impact, si bien que d'un côté la température du bain peut monter et que l'autre côté la zone de chaleur intense, où il existe le risque de la nitruration, peut être déplacée et par ce fait diluée.A major advantage achievable using the invention lies in the fact that it makes it possible to deflect the jet of oxygen and to move the point of impact on the surface of the bath, at will and at variable speed, without interrupting the blowing. This results in virtual enlargement of the impact zone and more pronounced mixing of the metal with the slag on the surface of the bath. Besides the favorable effects on the refining process, the displacement of the point of impact also causes a widening of the afterburning zone - see on this subject the patent LU 81 207-. Another advantage offered by the invention resides in a more extensive distribution of the heat which reigns at the point of impact, so that on one side the temperature of the bath can rise and the other side the zone of intense heat, where there is the risk of nitriding, can be moved and thereby diluted.
D'autres avantages et caractéristiques apparaîtront par la description des dessins qui représentent de manière non-limitative une forme d'éxecution possible de la lance suivant l'invention et où
- la fig.1 est une coupe longitudinale schématique à travers une tête de la lance selon l'invention, tandis que
- la fig.2 est un schéma représentant la variabilité de l'emplacement du point d'impact du jet, suivant une forme d'exécution de la tête de lance.
- Fig.1 is a schematic longitudinal section through a head of the lance according to the invention, while
- Fig.2 is a diagram showing the variability of the location of the point of impact of the jet, according to an embodiment of the lance head.
On distingue en fig.1 une partie (sans tuyères secondaires etc.) d'une tête de lance 1 avec des moyens de refroidissement par circulation d'eau 2. La tuyère verticale 4 guide un jet d'oxygène d'affinage 3, dont les propriétés physiques sont déterminées par la pression de la source d'oxygène, la vanne de réglage du débit et le profil et le dimensionnement des conduits d'oxygène depuis la source jusqu'à la chambre 6 située dans le prolongement de la tuyère 4. Cette chambre 6, qui relie la tuyère 4 à l'embouchure 7 de la lance, a une longueur de quelque 30 cm; elle n'aurait qu'une influence négligeable sur la dynamique du jet d'oxygène 3 (légère augmentation de vitesse, fonction de la section d'embouchure 7) s'il n'y avait, au voisinage de l'endroit 9 où la tuyère 4 s'évase dans la chambre 6, l'embouchure 5 de plusieurs conduits latéraux 10. Pour ne pas surcharger la figure, on n'a répresenté qu'un seul conduit latéral, mais dans la variante décrite, il y a huit embouchures 5, disposées symétriquement autour de l'embouchure 9 de la tuyère 4. Ces conduits guident un gaz, qui est de préférence de l'oxygène ou de l'air, de façon que sa direction d'écoulement près de l'embouchure 5 soit pratiquement transversale à celle du jet principal d'oxygène 3. Le débit de gaz, traversant les différents conduits 10 est réglé par l'intermédiaire de vannes 11, qui peuvent être du type on-off.We distinguish in fig.1 a part (without secondary nozzles etc.) of a
La chambre 6 présente sensiblement la forme d'une poire, tronquée des côtés supérieur et inférieur. La section de l'embouchure 7 est comparable à celle de l'endroit 9 où la chambre est raccordée à la tuyère 4. Le profil de l'évasement près de la tuyère 4 est peu critique mais doit être assez prononcé pour réaliser sur une distance de quelques dizaines de cm une déviation progressive du jet jusqu'à la déviation A désirée. A l'approche de l'embouchure 7, l'angle que prend le profil intérieur de la chambre avec l'axe longitudinal BBʹ de la tuyère 4 tend vers l'angle de déviation A désiré. Il s'ensuit que le profil intérieur de la chambre 6 est réalisé en tenant compte de la distance embouchure 7 - surface du bain ainsi que des dimensions du convertisseur ou, plus précisément, de la section horizontale du convertisseur à la hauteur normale du niveau du bain. La chambre 6 peut être de révolution où présenter vis à vis de chaque embouchure 5 des rainures dans lesquelles le jet 3 dévié vient se loger. Ces rainures peuvent avoir une profondeur telle qu'elles entourent un tiers de la section du jet 3 et présenter éventuellement une disposition en spirale autour de l'axe BBʹ. Dans cette dernière forme d'exécution le corps de lance est le siège, non seulement d'une force de réaction qui passe par l'axe BBʹ, mais également d'un couple de rotation.
Le fonctionnement du dispositif est le suivant: Au départ uniquement la tuyère 4 est reliée à la source d'oxygène, les différentes vannes 11 sont fermées; un jet dur et vertical d'oxygène primaire frappe la surface du bain. Dès qu'une déflection du jet est désirée, une des vannes 11 est actionnée et un jet de gaz pénètre dans la chambre 6, et créé une zone de surpression 8, hachurée. Cette zone de surpression provoque une déviation du jet 3 qui s'appuie, tout en gardant sa forme, contre la paroi de la chambre qui est opposée à l'embouchure 5 qui crée la zone de supression 8. Par suite de phénomènes d'aspiration par le jet d'oxygène primaire, la quantité de gaz nécessaire pour créer la poche 8 est substantielle; par contre, dès que le jet de gaz 3 est dévié, il ne faut plus qu'une quantité de gaz minime pour conserver la zone de surpression et maintenir le jet dévié.The operation of the device is as follows: At the start only the nozzle 4 is connected to the oxygen source, the
Une forme d'exécution possible prévoit de commander à l'aide d'un ordinateur les différentes vannes 11 en fonction du déroulement du processus d'affinage. En ouvrant, en fonction de la distribution de la température dans le convertisseur (profil de température à la surface du bain et profil de température au-dessus du bain conditionné par la combustion du monoxyde de carbone) une à une les différentes vannes 11, on peut promener le point d'impact suivant un trajet plus ou moins circulaire sur la surface du bain. On peut également ouvrir et refermer une après l'autre des vannes 11 à une fréquence préétablie, ce qui aura comme effet de réaliser tantôt un point d'impact central et tantôt un point d'impact qui se déplace sur des segments de cercle autour du centre du bain.One possible embodiment provides for controlling the
La fig.2 montre de manière schématique les différents points d'impact réalisables sur la surface du bain métallique, grâce à une tête de lance comportant une tuyère verticale dont le jet peut être dévié par huit conduits latéraux 10 tel que décrit plus haut. Le point J₀ est réalisé en gardant les huit vannes 11 fermées. En ouvrant une après l'autre une des vannes 11, il est possible de déplacer le jet pour réaliser par exemple le point d'impact J₁₀, puis J₂₀ etc. Fig.2 shows schematically the different points of impact achievable on the surface of the metal bath, thanks to a lance head comprising a vertical nozzle whose jet can be deflected by eight
Ainsi la tête de lance suivant l'invention permet de diriger le jet vers chacun des points d'impact représentés, dans le sens des flèches et on imagine que l'on peut préétablir des programmes de balayage de la surface, suivant des schémas empiriques, ou procéder suivant une situation donnée. On peut p.ex. constater qu'il s'est formé un loup dans le convertisseur dans une zone déterminée; en procédant à un balayage intense à l'oxygène dans cette zone, on peut faire fondre le loup.Thus the lance head according to the invention makes it possible to direct the jet towards each of the impact points represented, in the direction of the arrows and it is imagined that it is possible to pre-establish programs for scanning the surface, according to empirical diagrams, or proceed according to a given situation. We can eg observe that a wolf has formed in the converter in a specific area; by carrying out an intense oxygen scan in this area, the wolf can melt.
Claims (6)
- Lance for use in refining metals or ferroalloys by injecting oxygen from top into the bath, the head (1) of the said lance including the orifice (9) of at least one conduit (4) for conveying a jet (3) of refining oxygen at a supersonic velocity, characterized in that a chamber (6) is interposed between the orifice (9) of the said conduit (4) and the mouth (7) of the lance head, the chamber (6) widening progressively out from the said orifice (9) of the conduit (4) and narrowing toward the said mouth (7) of the lance head, in that at least one opening (5) of at least one lateral ducts (10) opens into the chamber (6) in the vicinity of the orifice (9) of the said conduit (4) and in that each of the lateral ducts (10) is connected to a gas source and comprises an individual valve (11) for regulating the flow.
- Lance according to claim 1, characterized in that at least three lateral ducts (10) are arranged symmetrically around the orifice (9) of the conduit (4).
- Lance according to the claims 1 or 2, characterized in that the chamber (6) is a body of revolution having essentially the shape of a pear which is truncated at top and at bottom.
- Lance according to the claims 1 to 3, characterized in that the inner wall of the chamber (6) includes grooves.
- Lance according to the claims 1 to 3, characterized in that the inner profile of the chamber (6) is dimensioned so that the profile angle, at the outlet of the lance head, corresponds to the desired angle of deflection A of the jet.
- Lance according to the claims 1 to 4, characterized in that the orifice (9) of the conduit (4) and the mouth (7) of the lance head have comparable dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87101776T ATE71151T1 (en) | 1986-02-25 | 1987-02-09 | OXYGEN BLOWING LANCE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU86321 | 1986-02-25 | ||
| LU86321A LU86321A1 (en) | 1986-02-25 | 1986-02-25 | OXYGEN BLOWING LANCE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0234388A2 EP0234388A2 (en) | 1987-09-02 |
| EP0234388A3 EP0234388A3 (en) | 1989-04-19 |
| EP0234388B1 true EP0234388B1 (en) | 1992-01-02 |
Family
ID=19730646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87101776A Expired - Lifetime EP0234388B1 (en) | 1986-02-25 | 1987-02-09 | Lance for blowing oxygen |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4730813A (en) |
| EP (1) | EP0234388B1 (en) |
| JP (1) | JPH0811807B2 (en) |
| AT (1) | ATE71151T1 (en) |
| AU (1) | AU580470B2 (en) |
| BR (1) | BR8700868A (en) |
| CA (1) | CA1323756C (en) |
| DE (1) | DE3775574D1 (en) |
| ES (1) | ES2028800T3 (en) |
| LU (1) | LU86321A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU87354A1 (en) * | 1988-09-28 | 1990-04-06 | Arbed | REFINING LANCE |
| LU87855A1 (en) * | 1990-12-10 | 1992-08-25 | Arbed | BLOWING LANCE |
| FR2735290B1 (en) * | 1995-06-07 | 1997-07-18 | Schneider Electric Sa | ASSEMBLY AND ELECTRICAL CONNECTION DEVICE FOR MODULAR APPLIANCES SUCH AS CIRCUIT BREAKERS OR SIMILAR |
| GB0209365D0 (en) * | 2002-04-24 | 2002-06-05 | Boc Group Plc | Injection of solids into liquids |
| GB0213376D0 (en) * | 2002-06-11 | 2002-07-24 | Boc Group Plc | Refining ferroalloys |
| JP5412756B2 (en) * | 2008-07-22 | 2014-02-12 | Ｊｆｅスチール株式会社 | Converter operation method |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1873996A (en) * | 1932-03-23 | 1932-08-30 | Patrick P Cunningham | Tuyere |
| FR1237740A (en) * | 1959-05-22 | 1960-08-05 | Siderurgie Fse Inst Rech | Adjustable insufflation lance for fine particles in suspension |
| US3207597A (en) * | 1961-10-19 | 1965-09-21 | Yawata Iron & Steel Co | Method of adding a liquid fuel to the air blast in a shaft furnace or specifically in a blast furnace |
| FR1346214A (en) * | 1963-02-02 | 1963-12-13 | Demag Ag | Lance for blowing oxygen especially in steel refining furnaces or converters |
| CA960856A (en) * | 1970-11-16 | 1975-01-14 | Edward T.C. Johnstone | Method and apparatus for feeding particulate materials to furnaces and the like |
| SU517638A1 (en) * | 1975-02-10 | 1976-06-15 | Новолипецкий Ордена Ленина Металлургический Завод | Blast Furnace Tuyere |
| LU81207A1 (en) * | 1979-04-30 | 1980-12-16 | Arbed | METHOD FOR REFINING A METAL BATH CONTAINING SOLID COOLING MATERIALS |
| SU817056A1 (en) * | 1979-06-05 | 1981-03-30 | Днепропетровский Ордена Трудовогокрасного Знамени Металлургическийинститут | Tuyere of blast furnace |
| SU1011699A1 (en) * | 1980-05-13 | 1983-04-15 | Череповецкий Ордена Ленина И Ордена Трудового Красного Знамени Металлургический Завод Им.50-Летия Ссср | Nozzle for blowing tuyere of steel smelting unit |
| SU908812A1 (en) * | 1980-07-28 | 1982-02-28 | Донецкий научно-исследовательский институт черной металлургии | Blasting tuyere for blast furnace |
| LU82846A1 (en) * | 1980-10-13 | 1982-05-10 | Arbed | OXYGEN BLOWING LANCE |
| LU83814A1 (en) * | 1981-12-04 | 1983-09-01 | Arbed | METHOD AND DEVICE FOR REFINING A METAL BATH CONTAINING SOLID COOLING MATERIALS |
| JPS58185707A (en) * | 1982-04-23 | 1983-10-29 | Sumitomo Metal Ind Ltd | Refining method of steel |
| LU84433A1 (en) * | 1982-10-22 | 1984-05-10 | Mecan Arbed Dommeldange S A R | DEVICE FOR PROVIDING CARBONATED AND SOLID MATERIALS TO A METAL BATH IN THE REFINING PROCESS |
| 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 |
-
1986
- 1986-02-25 LU LU86321A patent/LU86321A1/en unknown
-
1987
- 1987-02-02 CA CA000528768A patent/CA1323756C/en not_active Expired - Fee Related
- 1987-02-09 DE DE8787101776T patent/DE3775574D1/en not_active Expired - Lifetime
- 1987-02-09 ES ES198787101776T patent/ES2028800T3/en not_active Expired - Lifetime
- 1987-02-09 AT AT87101776T patent/ATE71151T1/en not_active IP Right Cessation
- 1987-02-09 EP EP87101776A patent/EP0234388B1/en not_active Expired - Lifetime
- 1987-02-20 US US07/017,156 patent/US4730813A/en not_active Expired - Fee Related
- 1987-02-24 BR BR8700868A patent/BR8700868A/en unknown
- 1987-02-25 JP JP62042451A patent/JPH0811807B2/en not_active Expired - Lifetime
- 1987-02-25 AU AU69251/87A patent/AU580470B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ES2028800T3 (en) | 1992-07-16 |
| EP0234388A3 (en) | 1989-04-19 |
| AU6925187A (en) | 1987-08-27 |
| BR8700868A (en) | 1987-12-22 |
| DE3775574D1 (en) | 1992-02-13 |
| US4730813A (en) | 1988-03-15 |
| EP0234388A2 (en) | 1987-09-02 |
| ATE71151T1 (en) | 1992-01-15 |
| JPS62205213A (en) | 1987-09-09 |
| LU86321A1 (en) | 1987-09-10 |
| CA1323756C (en) | 1993-11-02 |
| AU580470B2 (en) | 1989-01-12 |
| JPH0811807B2 (en) | 1996-02-07 |
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