EP0048641A1 - Means for protecting molten metal in a sliding gate - Google Patents
Means for protecting molten metal in a sliding gate Download PDFInfo
- Publication number
- EP0048641A1 EP0048641A1 EP81401315A EP81401315A EP0048641A1 EP 0048641 A1 EP0048641 A1 EP 0048641A1 EP 81401315 A EP81401315 A EP 81401315A EP 81401315 A EP81401315 A EP 81401315A EP 0048641 A1 EP0048641 A1 EP 0048641A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- metal
- nozzle
- inert gas
- aforementioned
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 42
- 230000004888 barrier function Effects 0.000 claims abstract description 15
- 239000012080 ambient air Substances 0.000 claims abstract description 9
- 239000011261 inert gas Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims 2
- 239000003570 air Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
Definitions
- the invention relates to the protection of the pouring jet of a molten metal contained in a container and passing through a plate shutter device comprising a fixed plate and a movable plate provided with at least one nozzle.
- shutter devices control the opening and closing of the taphole of the container, pocket or distributor, the nozzle being able to come into communication with said taphole. They therefore make it possible to pour the molten metal, for example steel, into an ingot mold or the like.
- the molten metal can be poured directly from the ladle into the ingot mold or, in the case of continuous casting, from the ladle into a distributor and then into the mold.
- the two plates are made of a material resistant to high temperatures such as ceramic or impregnated or tarred alumina.
- the movable plate can be sliding or rotary and be provided with a single nozzle or with several nozzles of different internal diameters. In the latter case, it is possible, by changing the nozzle, to modify the casting speed as a function, for example, of the height of the metal in the container.
- the two plates can be applied against each other by means of a spring system provided with a cooling circuit.
- the currently known shutter devices have numerous passage points for atmospheric air which is truly sucked in as a result of the depression caused by the flow of molten metal. These shutters increase the risk of occlusion of air bubbles in the metal during casting and therefore the risk of oxidation.
- the places through which air penetrates to the metal are: the gap between the two opposite faces of the fixed and movable plates due to the play necessary for their relative movement; the connection zone between the nozzle (s) and the movable plate, in particular when the said nozzle (s) are mounted removably on said plate; the outlet end of the nozzle; the connection between the fixed plate and the container as well as, in the case of nozzles permanently mounted on the movable plate, the connection between said nozzle and said plate, these connections being made by masonry using a cement grout inherently not gas tight and which becomes more and more porous due to the cracks which appear with use.
- the present invention aims to eliminate the aforementioned drawbacks and proposes for this purpose a method which consists in introducing into the shutter device, a gas practically inert with respect to the metal and having a pressure slightly higher than atmospheric pressure and to distribute this gas around the metal as it passes through said device so as to isolate it from ambient air by a continuous gaseous protection barrier.
- this gas barrier being constituted by a gas that is practically inert with respect to the treated metal, that is to say devoid of chemical action on this metal, or at least of which the chemical action, if it exists , can be neglected, does not entail any risk of harming the quality of the final product.
- the inert gas is introduced between the aforementioned plates and it is distributed around the metal by means of a groove hollowed out in one of the plates around a passage orifice passing through said plate.
- the inert gas is introduced into the junction zone between the nozzle and the movable plate.
- the invention also provides a plate shutter device comprising gas supply and distribution members connected to a source of gas that is practically inert with respect to the metal, these members forming a continuous envelope around the metal flowing in said metal. device, so as to create, between the metal and the ambient air, a gaseous protective barrier.
- the abovementioned supply and distribution members may comprise at least one recess formed in at least one of the aforementioned plates and communicating with the gap between the faces in mutual contact of said plates.
- the device 10 essentially comprises a fixed plate 11 and a movable plate 12 applied one against the other along their face 11a and 12a respectively by a spring system not shown, the movable plate 12 being rotatably mounted around an axis XX 'and carrying two nozzles 13, these nozzles being made, like the plates 11 and 12, of a material refractory, for example an impregnated alumina.
- the plate 11 is crossed by an orifice 110, placed in alignment with the taphole 6, while the movable plate 12 is crossed by two passages such as 120 (only one is shown.
- Each nozzle 13, crossed by an internal channel 130 (only one is shown), is provided with a metallic external breastplate 131 and permanently mounted on the plate 12 by means of the said leather 131 and a metallic support 121 secured to the said plate, so that its channel 130 is in alignment with the passage 120.
- the plate 11 is provided with a recess constituted by a circular groove 111 hollowed out on its face 11a, concentric with the orifice 110, and consequently communicating with the gap 11a-12a between the two plates.
- Two perpendicular conduits communicating with each other, 112 and 113, are drilled in the mass of the plate 11.
- the conduit 113 opens directly into the groove 111 while the conduit 112 is connected, via a tube 14, to a pressurized inert gas source 20, provided with a pressure reducer 21.
- the inert gas can be nitrogen, argon, a nitrogen-argon mixture or in the case of aluminum metallurgy for example , of C0 2 .
- the groove 111 as well as the conduits 112 and 113 therefore constitute organs for supplying and distributing the gas delivered by the source 20, this gas forming, between the two plates 11 and 12 and around the channel formed by the orifices 6, 110 , 120 and 130, a gas barrier that prevents ambient air from reaching the flowing metal.
- the movable plate 12 which is provided with a recess constituted by a circular groove 122 hollowed out on its face 12a concentrically with the passage 120 and thereby communicating with the gap 11a-12a.
- Two perpendicular conduits communicating with each other 123 and 124 are drilled in the mass of the plate 12. The conduit 124 opens directly into the groove 122 while the conduit 123 is connected, via a tube 125, to the source 20.
- each of these passages may be provided with a groove such as 122, or a single groove may be provided surrounding all of the passages :
- the nozzle 14, the central channel of which is designated by 140, is, unlike the nozzles 13 in FIG. 1, removably mounted on the plate 12, this thanks to an appropriate system of known type, for example with bayonet .
- the breastplate 141 of the nozzle 14 and the ring 142 carried on the support 121 are provided with latching means (not shown) which allow the nozzle to be held on the plate.
- a channel 126 is drilled in the plate 12 perpendicular to the conduit 123 and communicating with the latter, this channel 126 opening into the zone of junction 127 between nozzle and plate. Under these conditions, the inert gas fills the zone 127 thus creating a protective barrier around the flowing metal.
- the pressure of the inert gas is adjusted by means of the regulator 21, so as to obtain, in the grooves 111 or 122, an overpressure of a few millimeters of water relative to the local atmospheric pressure.
- a gaseous protective barrier is also created at the lower end of the nozzle 14, that is to say at the outlet of the liquid metal jet.
- the inert gas supply and distribution members comprise, in this case, an annular distributor constituted by a porous ring of refractory material 144 housed in a recess 145 formed at the outlet of the nozzle 14, this ring being connected, by a tubing 146, at source 20.
- the flow of inert gas from the ring 144 makes it possible to compensate for the depression caused by the emergence at high speed of the metal jet and prevents atmospheric air from reaching said metal.
- FIG. 3 A first alternative embodiment of the gaseous protective barrier at the outlet opening of the nozzle is shown in Figures 3 and 4.
- the nozzle 15, provided with a central channel 150 and a breastplate 151 comprises, at its lower part, an annular groove 152 into which tangentially opens a tube 153 connected to a source of inert gas under pressure (not shown). Between this groove 152 and the lower end of the nozzle, the refractory material has a smaller thickness, thus providing a channel 154 extending the channel 150 but having a larger diameter.
- the nozzle 16 provided with a central channel 160 and a breastplate 161 , comprises, at its lower part, a distributor constituted by a metallic flange 162 in the form of a trough which is extended, in the direction of the outlet end of said nozzle, a sleeve also metallic 163 which forms a coating on the armor 161, the nozzle being deprived, in this part, of refractory material.
- a distributor constituted by a metallic flange 162 in the form of a trough which is extended, in the direction of the outlet end of said nozzle, a sleeve also metallic 163 which forms a coating on the armor 161, the nozzle being deprived, in this part, of refractory material.
- a tube 164 connected to a source of inert gas in liquefied form (not shown) and delivering said gas in the liquid phase.
- the collar 162 and the sleeve 163 are metallic, for example made of mild steel, has the consequence of facilitating the transmission of calories from the metal jet and consequently of accelerating the passage from liquid phase to gaseous phase, the latter forming the desired protective barrier.
- the flow rate of the liquefied gas can be adjusted so that only a part is vaporized in the collar 162.
- the excess liquid phase then flows along the jet of metal and is spreads over the surface of the bath, forming a protective liquid layer.
- the device 10 is provided with a metal casing or cover 17 which is mounted in leaktight manner on the bottom of the container and which almost completely envelops said device, only an opening 170 being provided at its lower part for the passage of the nozzles 13 and the flow of the metallic jet.
- This housing 17 is supplied with inert gas under pressure from a source (not shown) such as the previous source 20, and maintains, around the device 10, an atmosphere which constitutes an effective protective barrier against atmospheric air. The gas escapes through the opening 170 thus forming, around the nozzles and the metal jet, an inert gas flow.
- This housing also protects the device 10 against metal splashes.
- the device 10 being assumed to have no spring system for holding the plates 11 and 12 against each other, therefore a cooling circuit, the inert gas is brought directly inside the housing 17 by a tube 171 integral with the latter.
- the device 10 is assumed to be equipped with a spring system associated with a compressed air cooling circuit.
- This spring system represented schematically and designated by the reference 18, comprises a stop 181 in the form of an inverted cup open at its lower end and integral with the plate 12, a support piece 182 in the form of a piston integral with the plate 11 and a spring 183 interposed between the stop 181 and the part 182.
- a tube 184 allows the supply of compressed cooling air into the stop 181, this air circulating, by conduits not shown, in the other identical elements of the system to springs.
- the tube 184 is connected not to a source of compressed air, but to the source of pressurized inert gas, so that the housing 17 is supplied via the cooling circuit of the spring system.
- the housing 17 is provided with an orifice 172 for the passage of the tubing 184.
- the grooves 111 and 122 of the fixed plate 11 and the movable plate 12 could have a shape other than circular, for example elliptical.
- the groove 152 and in the collar 162 of the nozzles 15 and 16 respectively could tangentially open several pipes such as 153 and 164 instead of just one.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
L'invention concerne la protection du jet de coulée d'un métal en fusion contenu dans un récipient (1) et traversant un dispositif obturateur à plaques comportant une plaque (11) fixe et une plaque (12) mobile munie d'une busette (13) au moins. On introduit, dans le dispositif précité, un gaz pratiquement inerte vis-à-vis du métal et ayant une pression légèrement supérieure à la pression atmosphérique et on répartit ce gaz autour du métal alors qu'il traverse ledit dispositif de façon à l'isoler de l'air ambiant par une barrière de protection gazeuse continue.The invention relates to the protection of the pouring jet of a molten metal contained in a container (1) and passing through a plate shutter device comprising a fixed plate (11) and a movable plate (12) provided with a nozzle ( 13) at least. A gas which is practically inert with respect to the metal and having a pressure slightly higher than atmospheric pressure is introduced into the aforementioned device and this gas is distributed around the metal while it passes through said device so as to isolate it ambient air through a continuous gas protection barrier.
Description
L'invention concerne la protection du jet de coulée d'un métal en fusion contenu dans un récipient et traversant un dispositif obturateur à plaques comportant une plaque fixe et une plaque mobile munie d'une busette au moins.The invention relates to the protection of the pouring jet of a molten metal contained in a container and passing through a plate shutter device comprising a fixed plate and a movable plate provided with at least one nozzle.
Ces dispositifs obturateurs commandent l'ouverture et la fermeture du trou de coulée du récipient, poche ou répartiteur, la busette pouvant venir en communication avec ledit trou de coulée. Ils permettent par conséquent de verser le métal en fusion, par exemple de l'acier, dans une lingotière ou analogue. Le versement du métal en fusion peut être fait directement de la poche dans la lingotière ou, dans le cas de coulée continue, de la poche dans un répartiteur puis dans la lingotière.These shutter devices control the opening and closing of the taphole of the container, pocket or distributor, the nozzle being able to come into communication with said taphole. They therefore make it possible to pour the molten metal, for example steel, into an ingot mold or the like. The molten metal can be poured directly from the ladle into the ingot mold or, in the case of continuous casting, from the ladle into a distributor and then into the mold.
Les deux plaques sont faites en un matériau résistant aux hautes températures tel que céramique ou alumine imprégnée ou goudronnée. La plaque mobile peut être coulissante ou rotative et être munie d'une busette unique ou de plusieurs busettes de diamètres internes différents. On peut, dans ce dernier cas, en changeant de busette, modifier la vitesse de coulée en fonction, par exemple, de la hauteur du métal dans le récipient. Les deux plaques peuvent être appliquées l'une contre l'autre au moyen d'un système à ressorts muni d'un circuit de refroidissement.The two plates are made of a material resistant to high temperatures such as ceramic or impregnated or tarred alumina. The movable plate can be sliding or rotary and be provided with a single nozzle or with several nozzles of different internal diameters. In the latter case, it is possible, by changing the nozzle, to modify the casting speed as a function, for example, of the height of the metal in the container. The two plates can be applied against each other by means of a spring system provided with a cooling circuit.
On sait, par ailleurs, qu'il importe d'éviter, au cours d'une coulée, tout contact entre l'air atmosphérique ambiant et le métal en fusion, ceci pour empêcher la formation d'oxydes divers dans la masse du métal, ces oxydes nuisant considérablement à la qualité du produit final.We know, moreover, that it is important to avoid, during a casting, any contact between the ambient atmospheric air and the molten metal, this to prevent the formation of various oxides in the mass of the metal, these oxides considerably harming the quality of the final product.
Or, les dispositifs obturateurs actuellement connus présentent de nombreux endroits de passage pour l'air atmosphérique qui est véritablement aspiré par suite de la dépression causée par l'écoulement du métal en fusion. Ces obturateurs augmentent les risques d'occlusion de bulles d'air dans le métal pendant la coulée et donc les risques d'oxydation.However, the currently known shutter devices have numerous passage points for atmospheric air which is truly sucked in as a result of the depression caused by the flow of molten metal. These shutters increase the risk of occlusion of air bubbles in the metal during casting and therefore the risk of oxidation.
Les endroits par lesquels l'air pénètre jusqu'au métal sont : l'interstice entre les deux faces en regard des plaques fixe et mobile en raison du jeu nécessaire à leur mouvement relatif; la zone de liaison entre la ou les busettes et la plaque mobile, en particulier lorsque ladite ou les dites busettes sont montées de façon amovible sur ladite plaque; l'extrémité de sortie de la busette; la liaison entre la plaque fixe et le récipient ainsi que, dans le cas de busettes montées à demeure sur la plaque mobile, la liaison entre ladite busette et ladite plaque, ces liaisons étant effectuées par maçonnage à l'aide d'un coulis de ciment par nature peu étanche aux gaz et qui devient de plus en plus poreux en raison des fissures qui apparaissent avec l'usage.The places through which air penetrates to the metal are: the gap between the two opposite faces of the fixed and movable plates due to the play necessary for their relative movement; the connection zone between the nozzle (s) and the movable plate, in particular when the said nozzle (s) are mounted removably on said plate; the outlet end of the nozzle; the connection between the fixed plate and the container as well as, in the case of nozzles permanently mounted on the movable plate, the connection between said nozzle and said plate, these connections being made by masonry using a cement grout inherently not gas tight and which becomes more and more porous due to the cracks which appear with use.
La présente invention a pour but d'éliminer les inconvénients susmentionnés et propose à cet effet un procédé qui consiste à introduire, dans le dispositif obturateur, un gaz pratiquement inerte vis-à-vis du métal et ayant une pression légèrement supérieure à la pression atmosphérique et à répartir ce gaz autour du métal alors qu'il traverse ledit dispositif de façon à l'isoler de l'air ambiant par une barrière de protection gazeuse continue.The present invention aims to eliminate the aforementioned drawbacks and proposes for this purpose a method which consists in introducing into the shutter device, a gas practically inert with respect to the metal and having a pressure slightly higher than atmospheric pressure and to distribute this gas around the metal as it passes through said device so as to isolate it from ambient air by a continuous gaseous protection barrier.
Une telle barrière s'oppose au passage de l'air ambiant et par conséquent à son action oxydante. De plus, cette barrière gazeuse étant constituée par un gaz pratiquement inerte vis-à-vis du métal traité, c'est-à-dire dépourvu d'action chimique sur ce métal, ou du moins dont l'action chimique, si elle existe, peut être négligée, n'entraîne aucun risque de nuire à la qualité du produit final.Such a barrier prevents the passage of ambient air and therefore its oxidizing action. In addition, this gas barrier being constituted by a gas that is practically inert with respect to the treated metal, that is to say devoid of chemical action on this metal, or at least of which the chemical action, if it exists , can be neglected, does not entail any risk of harming the quality of the final product.
Selon une autre caractéristique de l'invention, on introduit le gaz inerte entre les plaques précitées et on le répartit autour du métal au moyen d'une gorge creusée dans l'une des plaques autour d'un orifice de passage traversant ladite plaque.According to another characteristic of the invention, the inert gas is introduced between the aforementioned plates and it is distributed around the metal by means of a groove hollowed out in one of the plates around a passage orifice passing through said plate.
Selon une autre caractéristique de l'invention, on introduit le gaz inerte dans la zone de jonction entre la busette et la plaque mobile.According to another characteristic of the invention, the inert gas is introduced into the junction zone between the nozzle and the movable plate.
On peut encore isoler l'ensemble du dispositif en l'enfermant dans un boîtier et on alimente ledit boîtier en gaz inerte.It is also possible to isolate the entire device by enclosing it in a box and supplying said box with inert gas.
L'invention propose également un dispositif obturateur à plaques comportant des organes d'adduction et de répartition de gaz reliés à une source de gaz pratiquement inerte vis-à-vis du métal, ces organes formant une enveloppe continue autour du métal en écoulement dans ledit dispositif, de façon à créer, entre le métal et l'air ambiant, une barrière de protection gazeuse.The invention also provides a plate shutter device comprising gas supply and distribution members connected to a source of gas that is practically inert with respect to the metal, these members forming a continuous envelope around the metal flowing in said metal. device, so as to create, between the metal and the ambient air, a gaseous protective barrier.
Les organes d'adduction et de répartition précités peuvent comporter au moins un évidemment ménagé dans l'une au moins des plaques précitées et communiquant avec l'interstice entre les faces en contact mutuel des dites plaques.The abovementioned supply and distribution members may comprise at least one recess formed in at least one of the aforementioned plates and communicating with the gap between the faces in mutual contact of said plates.
Cet évidemment, relié à la source précitée, enferme donc une réserve de gaz inerte sous pression qui pénètre dans l'interstice précité et s'oppose efficacement à la pénétration de l'air ambiant par ledit interstice.This obviously, connected to the aforementioned source, therefore encloses a reserve of pressurized inert gas which penetrates into the aforementioned interstice and effectively opposes the penetration of ambient air through said interstice.
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description qui va suivre.Other characteristics and advantages of the invention will emerge during the description which follows.
Dans les dessins annexés donnés uniquement à titre d'exemple non limitatif :
- - la figure 1 est une représentation schématique, partiellement en vue extérieure et partiellement en coupe, d'un dispositif obturateur selon un premier mode de réalisation de l'invention ;
- - la figure 2 est une vue partielle en coupe d'un second mode de réalisation de l'invention comportant une busette à sortie protégée;
- - la figure 3 est une vue partielle en coupe d'une première variante de réalisation de la busette à sortie protégée précitée;
- - la figure 4 est une coupe selon la ligne IV-IV de la figure 3;
- - la figure 5 est une vue partielle en coupe d'une seconde variante de réalisation de la busette à sortie protégée;
- - la figure 6 est une représentation schématique, partiellement en vue extérieure et partiellement en coupe, d'un dispositif selon un troisième mode de réalisation de l'invention;
- - la figure 7 représente une variante du dispositif de la figure 6. Selon le mode de réalisation représenté à la figure 1, un récipient métallique 1, par exemple une poche de coulée, constituée d'une cuirasse externe métallique 2 et d'un revêtement interne 3 en matériau réfractaire, présente une paroi de fond munie d'une douille interchangeable 5, également en matériau réfractaire, dans laquelle est ménagé le trou de
coulée 6. Sur cette paroi de fond 4, et extérieurement à cette dernière, est monté un dispositif obturateur du trou decoulée 6 conforme à l'invention et désigné d'une façon générale par laréférence 10.
- - Figure 1 is a schematic representation, partially in external view and partially in section, of a shutter device according to a first embodiment of the invention;
- - Figure 2 is a partial sectional view of a second embodiment of the invention comprising a nozzle with protected outlet;
- - Figure 3 is a partial sectional view of a first alternative embodiment of the aforementioned protected outlet nozzle;
- - Figure 4 is a section along the line IV-IV of Figure 3;
- - Figure 5 is a partial sectional view of a second alternative embodiment of the nozzle with protected outlet;
- - Figure 6 is a schematic representation, partially in external view and partially in section, of a device according to a third embodiment of the invention;
- - Figure 7 shows a variant of the device of Figure 6. According to the embodiment shown in Figure 1, a metal container 1, for example a ladle, consisting of a metal
outer breastplate 2 and a coating internal 3 made of refractory material, has a bottom wall provided with aninterchangeable bush 5, also made of refractory material, in which thetap hole 6 is formed. On this bottom wall 4, and outside this latter, is mounted ataphole shutter device 6 according to the invention and generally designated by thereference 10.
Le dispositif 10 comporte essentiellement une plaque fixe 11 et une plaque mobile 12 appliquées l'une contre l'autre selon leur face 11a et 12a respectivement par un système à ressort non représenté, la plaque mobile 12 étant montée rotativement autour d'un axe XX' et portant deux busettes 13, ces busettes étant faites, comme les plaques 11 et 12, en un matériau réfractaire, par exemple une alumine imprégnée.The
La plaque 11 est traversée par un orifice 110, placé en alignement avec le trou de coulée 6, tandis que la plaque mobile 12 est traversée par deux passages tels que 120 (un seul est représenta. Chaque busette 13, traversée par un canal interne 130 (un seul est représenté), est munie d'une cuirasse externe métallique 131 et montée à demeure sur la plaque 12 par l'intermédiaire de ladite cuirae- se 131 et d'un support métallique 121 solidaire de ladite plaque,de telle façon que son canal 130 soit en alignement avec le passage 120. Par rotation de la plaque 12 on amène donc l'une ou l'autre des busettes 13 (la busette de gauche sur la figure 1) en communication avec le trou de coulée 6.The
La plaque 11 est munie d'un évidement constitué par une gorge circulaire 111 creusée sur sa face 11a, concentriquement à l'orifice 110, et communiquant par conséquent avec l'interstice 11a-12a entre les deux plaques. Deux conduits perpendiculaires communiquant entre eux, 112 et 113, sont percés dans la masse de la plaque 11. Le conduit 113 débouche directement dans la gorge 111 tandis que le conduit 112 est relié, par l'intermédiaire d'une tubulure 14, à une source de gaz inerte sous pression 20, munie d'un détendeur 21. Le gaz inerte peut être de l'azote, de l'argon, un mélange d'azote- argon ou encore dans le cas de métallurgie de l'aluminium par exemple, du C0 2.The
La gorge 111 ainsi que les conduits 112 et 113 constituent donc des organes d'adduction et de répartition du gaz délivré par la source 20, ce gaz formant, entre les deux plaques 11 et 12 et autour du canal constitué par les orifices 6, 110, 120 et 130, une barrière gazeuse qui empêche l'air ambiant d'atteindre le métal en écoulement.The
Selon le mode de réalisation représenté dans la figure 2 dans laquelle les mêmes chiffres de référence désignent les mêmes éléments que dans la figure 1, c'est la plaque mobile 12 qui est munie d'un évidement constitué par une gorge circulaire 122 creusée sur sa face 12a concentriquement au passage 120 et communiquant de ce fait avec l'interstice 11a-12a. Deux conduits perpendiculaires et communiquant entre eux 123 et 124 sont percés dans la masse de la plaque 12. Le conduit 124 débouche directement dans la gorge 122 tandis que le conduit 123 est relié, par l'intermédiaire d'une tubulure 125, à la source 20. Dans le cas d'une plaque mobile portant plusieurs busettes donc, plusieurs passages tels que 120, chacun de ces passages peut être muni d'une gorge telle que 122, ou il peut être prévu une seule gorge entourant l'ensemble des passages: La busette 14, dont le canal central est désigné par 140, est, à la différence des busettes 13 de la figure 1, montée de façon amovible sur la plaque 12, ceci grâce à un système approprié de type connu, par exemple à baïonnette. A cet effet, la cuirasse 141 de la busette 14 et la bague 142 portée sur le support 121, sont munies de moyens d'enclenchement (non représentés) qui permettent le maintien de la busette sur la plaque. La zone de jonction entre cette busette amovible 14 et la plaque 12 constituant un passage possible pour l'air ambiant, un canal 126 est percé dans la plaque 12 perpendiculairement au conduit 123 et communiquant avec ce dernier, ce canal 126 débouchant dans la zone de jonction 127 entre busette et plaque. Dans ces conditions, le gaz inerte remplit la zone 127 créant ainsi une barrière de protection autour du métal en écoulement.According to the embodiment shown in Figure 2 in which the same reference numerals designate the same elements as in Figure 1, it is the
La pression du gaz inerte est réglée au moyen du détendeur 21, de façon à obtenir, dans les gorges 111 ou 122, une surpression de quelques millimètres d'eau par rapport à la pression atmosphérique locale.The pressure of the inert gas is adjusted by means of the
Dans le mode de réalisation de la figure 2, une barrière de protection gazeuse est créée également à l'extrémité inférieure de la busette 14, c'est-à-dire à la sortie du jet de métal liquida. Les organes d'adduction et de répartition du gaz inerte comportent, dans ce cas, un distributeur annulaire constitué par une bague poreuse en matériau réfractaire 144 logée dans un embrèvement 145 ménagé à la sortie de la busette 14, cette bague étant reliée, par une tubulure 146, à la source 20. Le débit de gaz inerte issu de la bague 144 permet de compenser la dépression provoquée par l'émergence à grande vitesse du jet de métal et empêche l'air atmosphérique d'atteindre ledit métal.In the embodiment of Figure 2, a gaseous protective barrier is also created at the lower end of the
Une première variante de réalisation de la barrière de protection gazeuse à l'orifice de sortie de la busette est représentée aux figures 3 et 4. Dans ce cas de figure, la busette 15, munie d'un canal central 150 et d'une cuirasse 151, comporte, à sa partie inférieure, une gorge annulaire 152 dans laquelle débouche tangentiellement une tubulure 153 reliée à une source de gaz inerte sous pression (non représentée). Entre cette gorge 152 et l'extrémité inférieure de la busette, le matériau réfractaire présente une moindre épaisseur, ménageant ainsi un canal 154 prolongeant le canal 150 mais de diamètre supérieur. On obtient ainsi dans le canal élargi 154, autour du jet de métal liquide dont le diamètre est celui du canal 150, un flot de gaz inerte qui arrive tangentiellement audit jet, formant autour de lui une barrière gazeuse homogène. L'aspiration créée par le jet de métal tendant à entraîner le gaz inerte, on règle de préférence le débit de ce dernier de façon que son apport se fasse à vitesse égale à celle du métal liquide.A first alternative embodiment of the gaseous protective barrier at the outlet opening of the nozzle is shown in Figures 3 and 4. In this case, the
Une seconde variante de réalisation de la barrière de protection gazeuse à l'orifice de sortie de la busette est représentée à la figure 5. Dans ce cas de figure, la busette 16, munie d'un canal central 160 et d'une cuirasse 161, comporte, à sa partie inférieure, un distributeur constitué par une collerette métallique 162 en forme d'auge que prolonge, en direction de l'extrémité de sortie de ladite busette, un manchon également métallique 163 qui forme un revêtement sur la cuirasse 161, la busette étant démunie, dans cette partie, de matériau réfractaire. Dans la collerette 162 débouche tangentiellement une tubulure 164 reliée à une source de gaz inerte sous forme liquéfiée (non représentée) et délivrant ledit gaz en phase liquide. Le fait que la collerette 162 et le manchon 163 soient métalliques, par exemple en acier doux, a pour conséquence de faciliter la transmission des calories du jet de métal et par conséquent d'accélérer le passage de phase liquide en phase gazeuse, cette dernière formant la barrière de protection désirée. On peut régler le débit du gaz liquéfié de façon qu'une partie seulement soit vaporisée dans la collerette 162. L'excès de phase liquide s'écoule alors le long du jet du métal et se répand sur la surface du bain, en formant une couche liquide protectrice.A second alternative embodiment of the gaseous protective barrier at the outlet orifice of the nozzle is shown in FIG. 5. In this case, the
Selon les modes de réalisation des figures 6 et 7, dans lesquelles les mêmes chiffres de référence désignent les mêmes éléments que dans les figures précédentes, le dispositif 10 est muni d'un boîtier ou capot métallique 17 qui est monté de façon étanche sur le fond du récipient et qui enveloppe pratiquement complètement ledit dispositif, seule une ouverture 170 étant prévue à sa partie inférieure pour le passage des busettes 13 et l'écoulement du jet métallique. Ce boîtier 17 est alimenté en gaz inerte sous pression par une source (non représentée) telle que la source 20 précédente, et maintient, autour du dispositif 10, une atmosphère qui constitue une barrière de protection efficace contre l'air atmosphérique. Le gaz s'échappe par l'ouverture 170 formant ainsi, autour des buses et du jet métallique, un flux gazeux inerte. Ce boîtier protège en outre le dispositif 10 contre les projections de métal.According to the embodiments of Figures 6 and 7, in which the same reference numerals designate the same elements as in the previous figures, the
Dans la figure 6, le dispositif 10 étant supposé démuni de système à ressorts pour le maintien des plaques 11 et 12 l'une contre l'autre, donc de circuit de refroidissement, le gaz inerte est amené directement à l'intérieur du boîtier 17 par une tubulure 171 solidaire de ce dernier.In FIG. 6, the
Dans la figure 7, le dispositif 10 est supposé équipé d'un système à ressorts associé à un circuit de refroidissement à air comprimé. Ce système à ressorts, représenté schématiquement et désigné par la référence 18, comporte une butée 181 en forme de coupelle renversée ouverte à son extrémité inférieure et solidaire de la plaque 12, une pièce d'appui 182 en forme de piston solidaire de la plaque 11 et un ressort 183 interposé entre la butée 181 et la pièce 182. Une tubulure 184 permet l'amenée d'air comprimé de refroidissement dans la butée 181, cet air circulant, par des conduits non représentés, dans les autres éléments identiques du système à ressorts. Dans ce cas, la tubulure 184 est reliée non pas à une source d'air comprimé, mais à la source de gaz inerte sous pression, de sorte que le boîtier 17 est alimenté par l'intermédiaire du circuit de refroidissement du système à ressorts. Le boîtier 17 est muni d'un orifice 172 pour le passage de la tubulure 184.In FIG. 7, the
On pourrait apporter aux modes de réalisation décrits et représentés diverses modifications sans pour autant sortir du cadre de l'invention. C'est ainsi que, par exemple, les gorges 111 et 122 de la plaque fixe 11 et de la plaque mobile 12 pourraient avoir une forme autre que circulaire, par exemple elliptique. De même, dans la gorge 152 et dans la collerette 162 des busettes 15 et 16 respectivement pourraient déboucher tangentiellement plusieurs tubulures telles que 153 et 164 au lieu d'une seule.Various modifications could be made to the embodiments described and shown without departing from the scope of the invention. Thus, for example, the
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81401315T ATE10915T1 (en) | 1980-09-15 | 1981-08-18 | DEVICE FOR PROTECTING MOLTEN METAL IN SLIDE CLOSURES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8019837A FR2490123A1 (en) | 1980-09-15 | 1980-09-15 | PLATE SHUTTER DEVICE FOR CONTAINER CASTING HOLES CONTAINING A FUSION METAL |
FR8019837 | 1980-09-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0048641A1 true EP0048641A1 (en) | 1982-03-31 |
EP0048641B1 EP0048641B1 (en) | 1984-12-27 |
EP0048641B2 EP0048641B2 (en) | 1989-09-20 |
Family
ID=9245923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81401315A Expired EP0048641B2 (en) | 1980-09-15 | 1981-08-18 | Means for protecting molten metal in a sliding gate |
Country Status (10)
Country | Link |
---|---|
US (1) | US4480770A (en) |
EP (1) | EP0048641B2 (en) |
JP (1) | JPS5752564A (en) |
AR (1) | AR225364A1 (en) |
AT (1) | ATE10915T1 (en) |
AU (1) | AU543563B2 (en) |
CA (1) | CA1186146A (en) |
DE (1) | DE3167942D1 (en) |
FR (1) | FR2490123A1 (en) |
ZA (1) | ZA815454B (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0089282A1 (en) * | 1982-03-15 | 1983-09-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and device for the protection of a casting stream of liquid metal |
FR2529811A1 (en) * | 1982-07-12 | 1984-01-13 | Didier Werke Ag | CLOSURE FOR A CONTAINER COMPRISING A LIQUID FOLDED METAL MASS, IN PARTICULAR A DRAWER CLOSURE FOR A CASTING POUCH |
FR2530167A1 (en) * | 1982-07-13 | 1984-01-20 | Air Liquide | Method and installation for protecting a liquid metal runner. |
DE3406075A1 (en) * | 1983-11-02 | 1985-05-09 | Sumitomo Metal Industries, Ltd., Osaka | DEVICE FOR DELIVERING MOLTEN METAL |
DE3406076A1 (en) * | 1983-11-02 | 1985-05-09 | Toshiba Ceramics Co., Ltd., Tokio/Tokyo | DEVICE FOR DELIVERING MOLTEN METAL |
DE3342071A1 (en) * | 1983-11-22 | 1985-06-05 | Didier-Werke Ag, 6200 Wiesbaden | DEVICE FOR SHIELDING A METAL CASTING RAY |
FR2564958A1 (en) * | 1984-05-23 | 1985-11-29 | Stopinc Ag | ROTATING SLIDER CLOSURE FOR METALLURGICAL TANKS OR CONTAINERS |
EP0171589A1 (en) * | 1984-07-18 | 1986-02-19 | RADEX ITALIANA S.p.A. | Collector nozzle in a device for controlling the outflow of cast steel from a ladle or from a tundish |
US4586249A (en) * | 1983-12-30 | 1986-05-06 | Westinghouse Electric Corp. | Mandrel having an eddy current probe |
US4649493A (en) * | 1983-12-30 | 1987-03-10 | Westinghouse Electric Corp. | Tube expansion apparatus |
BE1001239A3 (en) * | 1987-12-03 | 1989-08-29 | Vesuvius Internat Corp | Metallurgical vessel sliding closure - made airtight by grooved metal band providing inert gas shroud |
EP0446406A1 (en) * | 1990-03-13 | 1991-09-18 | Zimmermann & Jansen GmbH | Sliding gate valve for a metallurgical vessel, especially a casting ladle |
EP0483521A1 (en) * | 1990-10-31 | 1992-05-06 | Didier-Werke Ag | Connection between nozzle and casting tube for metallurgical vessels |
WO1992020480A1 (en) * | 1991-05-21 | 1992-11-26 | International Industrial Engineering S.A. | Sealing belt for a casting tube |
FR2695335A1 (en) * | 1992-09-09 | 1994-03-11 | Lorraine Laminage | Drawer linear pocket steel. |
BE1006006A3 (en) * | 1990-12-19 | 1994-04-19 | Int Ind Eng Sa | Refractory piece for a casting tap hole on a furnace receptacle |
WO1998017421A1 (en) * | 1996-10-17 | 1998-04-30 | Vesuvius Crucible Company | Plant for transferring liquid metal, method of operation, and refractories |
FR2757431A1 (en) * | 1996-12-20 | 1998-06-26 | Vesuvius France Sa | Refractory pouring spout assembly for molten metal transfer |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3506426C1 (en) * | 1985-02-23 | 1985-11-28 | Stopinc Ag, Baar | Method for pouring molten metal from a container having a shut-off device |
US4887748A (en) * | 1986-12-29 | 1989-12-19 | J. W. Hicks, Inc. | Apparatus and method for attachment of submerged nozzle to lower plate of sliding gate valve mechanism for a continuous casting operation |
US4949885A (en) * | 1989-02-23 | 1990-08-21 | Inland Steel Company | Apparatus and method for containing inert gas around molten metal stream |
US5067552A (en) * | 1989-07-26 | 1991-11-26 | Ltv Steel Company, Inc. | Shrouding for top pouring of ingots |
FR2684980B1 (en) * | 1991-12-16 | 1994-03-18 | Kodak Pathe | ORGANOMETALLIC DECOMPOSITION PROCESS FOR PREPARING A METAL BORATE. |
JP2575587B2 (en) * | 1993-04-21 | 1997-01-29 | アルインコ株式会社 | Display device of receiver |
JPH06310993A (en) * | 1993-04-21 | 1994-11-04 | Aruinko Kk | Display device for receiver |
US6228187B1 (en) | 1998-08-19 | 2001-05-08 | Air Liquide America Corp. | Apparatus and methods for generating an artificial atmosphere for the heat treating of materials |
US6491863B2 (en) | 2000-12-12 | 2002-12-10 | L'air Liquide-Societe' Anonyme A' Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes George Claude | Method and apparatus for efficient utilization of a cryogen for inert cover in metals melting furnaces |
WO2008055662A1 (en) * | 2006-11-08 | 2008-05-15 | Stopinc Aktiengesellschaft | Device for a container for nonferrous molten metal, having a locking unit and a protective cap |
KR101541138B1 (en) | 2008-12-16 | 2015-08-03 | 주식회사 동진쎄미켐 | New Liquid Crystal Compounds and method for preparing the same |
CN113365759B (en) * | 2019-01-30 | 2023-07-25 | 杰富意钢铁株式会社 | Control method of sliding gate valve device and manufacturing method of cast piece |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH387883A (en) * | 1959-10-13 | 1965-02-15 | Beteiligungs & Patentverw Gmbh | Pouring device |
FR2227073A1 (en) * | 1973-04-27 | 1974-11-22 | Didier Werke Ag | |
FR2252157A1 (en) * | 1973-11-23 | 1975-06-20 | Uss Eng & Consult | |
US4131219A (en) * | 1976-08-03 | 1978-12-26 | United States Steel Corporation | Pouring of molten metals |
FR2395095A1 (en) * | 1977-06-24 | 1979-01-19 | Detalle Pol | Determn. of gas tightness in sliding gate valve of casting vessel - by supplying gas to the sliding plates when in the closed position and determining gas physical characteristics for comparison with standard |
FR2396611A1 (en) * | 1977-07-09 | 1979-02-02 | Didier Werke Ag | MOLDED BRICK FOR CASTING OUTLET AND PROCESS FOR ITS MANUFACTURING |
FR2403852A1 (en) * | 1977-09-22 | 1979-04-20 | Air Liquide | METHOD AND DEVICE FOR PROTECTING A VERTICAL CASTING JET OF MELT METAL BY MEANS OF LIQUEFIED INERT GAS |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3673039A (en) * | 1971-01-20 | 1972-06-27 | Southwire Co | Method of preparing pouring spout |
SU458382A1 (en) * | 1972-11-20 | 1975-01-30 | Новолипецкий Металлургический Завод | Teeming Glass |
US3946907A (en) * | 1973-11-02 | 1976-03-30 | Fried. Krupp Huttenwerke Ag | Vacuum sealing for the discharge nozzle of a casting ladle serving as a vacuum container |
GB1492534A (en) * | 1974-11-04 | 1977-11-23 | Flogates Ltd | Pouring of metals |
JPS5420938A (en) * | 1977-07-15 | 1979-02-16 | Kawasaki Steel Co | Winding method of hot strip |
US4199087A (en) * | 1978-01-25 | 1980-04-22 | United States Steel Corporation | Apparatus for injection of inert gas to prevent superspeed effect |
AT368415B (en) * | 1979-02-20 | 1982-10-11 | Voest Alpine Ag | INSTALLATION ON A METALLURGICAL TUBE WITH A PROTECTIVE PIPE |
-
1980
- 1980-09-15 FR FR8019837A patent/FR2490123A1/en active Granted
-
1981
- 1981-07-07 ZA ZA815454A patent/ZA815454B/en unknown
- 1981-08-07 AU AU73898/81A patent/AU543563B2/en not_active Ceased
- 1981-08-12 JP JP56125417A patent/JPS5752564A/en active Pending
- 1981-08-18 DE DE8181401315T patent/DE3167942D1/en not_active Expired
- 1981-08-18 EP EP81401315A patent/EP0048641B2/en not_active Expired
- 1981-08-18 AT AT81401315T patent/ATE10915T1/en not_active IP Right Cessation
- 1981-08-19 US US06/294,323 patent/US4480770A/en not_active Expired - Fee Related
- 1981-09-02 AR AR286632A patent/AR225364A1/en active
- 1981-09-08 CA CA000385354A patent/CA1186146A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH387883A (en) * | 1959-10-13 | 1965-02-15 | Beteiligungs & Patentverw Gmbh | Pouring device |
FR2227073A1 (en) * | 1973-04-27 | 1974-11-22 | Didier Werke Ag | |
FR2252157A1 (en) * | 1973-11-23 | 1975-06-20 | Uss Eng & Consult | |
US4131219A (en) * | 1976-08-03 | 1978-12-26 | United States Steel Corporation | Pouring of molten metals |
FR2395095A1 (en) * | 1977-06-24 | 1979-01-19 | Detalle Pol | Determn. of gas tightness in sliding gate valve of casting vessel - by supplying gas to the sliding plates when in the closed position and determining gas physical characteristics for comparison with standard |
FR2396611A1 (en) * | 1977-07-09 | 1979-02-02 | Didier Werke Ag | MOLDED BRICK FOR CASTING OUTLET AND PROCESS FOR ITS MANUFACTURING |
FR2403852A1 (en) * | 1977-09-22 | 1979-04-20 | Air Liquide | METHOD AND DEVICE FOR PROTECTING A VERTICAL CASTING JET OF MELT METAL BY MEANS OF LIQUEFIED INERT GAS |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0089282A1 (en) * | 1982-03-15 | 1983-09-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and device for the protection of a casting stream of liquid metal |
FR2529811A1 (en) * | 1982-07-12 | 1984-01-13 | Didier Werke Ag | CLOSURE FOR A CONTAINER COMPRISING A LIQUID FOLDED METAL MASS, IN PARTICULAR A DRAWER CLOSURE FOR A CASTING POUCH |
USRE33036E (en) * | 1982-07-12 | 1989-08-29 | Didier-Werke Ag | Closure mechanism with gas seal |
FR2530167A1 (en) * | 1982-07-13 | 1984-01-20 | Air Liquide | Method and installation for protecting a liquid metal runner. |
DE3406075A1 (en) * | 1983-11-02 | 1985-05-09 | Sumitomo Metal Industries, Ltd., Osaka | DEVICE FOR DELIVERING MOLTEN METAL |
DE3406076A1 (en) * | 1983-11-02 | 1985-05-09 | Toshiba Ceramics Co., Ltd., Tokio/Tokyo | DEVICE FOR DELIVERING MOLTEN METAL |
DE3342071A1 (en) * | 1983-11-22 | 1985-06-05 | Didier-Werke Ag, 6200 Wiesbaden | DEVICE FOR SHIELDING A METAL CASTING RAY |
US4586249A (en) * | 1983-12-30 | 1986-05-06 | Westinghouse Electric Corp. | Mandrel having an eddy current probe |
US4649493A (en) * | 1983-12-30 | 1987-03-10 | Westinghouse Electric Corp. | Tube expansion apparatus |
FR2564958A1 (en) * | 1984-05-23 | 1985-11-29 | Stopinc Ag | ROTATING SLIDER CLOSURE FOR METALLURGICAL TANKS OR CONTAINERS |
EP0171589A1 (en) * | 1984-07-18 | 1986-02-19 | RADEX ITALIANA S.p.A. | Collector nozzle in a device for controlling the outflow of cast steel from a ladle or from a tundish |
BE1001239A3 (en) * | 1987-12-03 | 1989-08-29 | Vesuvius Internat Corp | Metallurgical vessel sliding closure - made airtight by grooved metal band providing inert gas shroud |
EP0446406A1 (en) * | 1990-03-13 | 1991-09-18 | Zimmermann & Jansen GmbH | Sliding gate valve for a metallurgical vessel, especially a casting ladle |
EP0483521A1 (en) * | 1990-10-31 | 1992-05-06 | Didier-Werke Ag | Connection between nozzle and casting tube for metallurgical vessels |
BE1006006A3 (en) * | 1990-12-19 | 1994-04-19 | Int Ind Eng Sa | Refractory piece for a casting tap hole on a furnace receptacle |
WO1992020480A1 (en) * | 1991-05-21 | 1992-11-26 | International Industrial Engineering S.A. | Sealing belt for a casting tube |
BE1004804A4 (en) * | 1991-05-21 | 1993-02-02 | Internat Ind Engineering S A | Belt seal tube casting. |
US5390902A (en) * | 1991-05-21 | 1995-02-21 | International Industrial Engineering S.A. | Belt for sealing a pouring tube |
FR2695335A1 (en) * | 1992-09-09 | 1994-03-11 | Lorraine Laminage | Drawer linear pocket steel. |
EP0587485A1 (en) * | 1992-09-09 | 1994-03-16 | Sollac | Slide gate for steel ladle |
WO1998017421A1 (en) * | 1996-10-17 | 1998-04-30 | Vesuvius Crucible Company | Plant for transferring liquid metal, method of operation, and refractories |
WO1998017420A1 (en) * | 1996-10-17 | 1998-04-30 | Vesuvius Crucible Company | Refractory assemblies |
EA000604B1 (en) * | 1996-10-17 | 1999-12-29 | Везувиус Крусибл Компани | Refractory assemblies |
EA000774B1 (en) * | 1996-10-17 | 2000-04-24 | Везувиус Крусибл Компани | Plant for transferring liquid metal and method of operation |
FR2757431A1 (en) * | 1996-12-20 | 1998-06-26 | Vesuvius France Sa | Refractory pouring spout assembly for molten metal transfer |
Also Published As
Publication number | Publication date |
---|---|
FR2490123B1 (en) | 1983-12-09 |
AR225364A1 (en) | 1982-03-15 |
FR2490123A1 (en) | 1982-03-19 |
EP0048641B2 (en) | 1989-09-20 |
JPS5752564A (en) | 1982-03-29 |
ZA815454B (en) | 1982-07-28 |
AU7389881A (en) | 1982-03-25 |
ATE10915T1 (en) | 1985-01-15 |
DE3167942D1 (en) | 1985-02-07 |
CA1186146A (en) | 1985-04-30 |
US4480770A (en) | 1984-11-06 |
EP0048641B1 (en) | 1984-12-27 |
AU543563B2 (en) | 1985-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0048641B1 (en) | Means for protecting molten metal in a sliding gate | |
EP0269180A2 (en) | Device for casting pasty metals | |
EP0094926B1 (en) | Orifice for injecting a protecting gas into a casting tube | |
FR2529811A1 (en) | CLOSURE FOR A CONTAINER COMPRISING A LIQUID FOLDED METAL MASS, IN PARTICULAR A DRAWER CLOSURE FOR A CASTING POUCH | |
EP0441927B1 (en) | Sealable casting device for a metallurgical container | |
EP0089282B1 (en) | Process and device for the protection of a casting stream of liquid metal | |
EP0404641B1 (en) | Tundish for continuous casting steel | |
EP0305426B1 (en) | Installation for pouring liquid metal, and process for its implementation | |
FR2551374A1 (en) | DEVICE FOR REFRACTORY PLATES OF SLIDING SHUTTERS | |
EP0213042B1 (en) | Equipment for protecting a liquid-metal jet against oxidation and/or nitriding | |
EP0589762B1 (en) | Casting tube for metal and process for manufacturing such a tube | |
FR2629101A1 (en) | BRICK FOR THE INTRODUCTION OF GASES OR REACTION PRODUCTS IN A METALLURGICAL CASTING CONTAINER | |
FR2728491A1 (en) | Device for casting molten metal | |
EP0327526B1 (en) | Device for cooling a metal during casting | |
EP0242347A2 (en) | Apparatus for metal slurry casting | |
EP0370934B1 (en) | Method of and device for alimentation of an ingot mold with molten metal in a continuous casting installation for thin blooms | |
EP0498684B1 (en) | Ejecting device for the supporting arrangement of a pouring stream protective tube in a continuous casting machine | |
CA1206752A (en) | Method and device for draining metallurgical vessels | |
BE1004282A6 (en) | Warming device of casting nozzle for metal fusion and casting plant of metal equipped with this device. | |
EP0282824A2 (en) | Device for emptying metallurgical vessels | |
BE1013748A3 (en) | Device for continuous direct casting of steel | |
BE1001778A3 (en) | Device for closing a rotary key | |
LU86395A1 (en) | Device and method for casting metals in plastic phase - improving grain structure and reducing segregation | |
BE891379A (en) | PROCESS FOR MAKING AN AIRTIGHT BLOCKING DEVICE AIRTIGHT AND DEVICE PROVIDED THEREFOR | |
BE381936A (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
17P | Request for examination filed |
Effective date: 19820617 |
|
ITF | It: translation for a ep patent filed | ||
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 10915 Country of ref document: AT Date of ref document: 19850115 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3167942 Country of ref document: DE Date of ref document: 19850207 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: DIDIER-WERKE AG Effective date: 19850927 Opponent name: MARTIN & PAGENSTECHER GMBH Effective date: 19850926 Opponent name: ZIMMERMANN & JANSEN GMBH Effective date: 19850927 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: DIDIER-WERKE AG Opponent name: MARTIN & PAGENSTECHER GMBH Opponent name: ZIMMERMANN & JANSEN GMBH |
|
PUAH | Patent maintained in amended form |
Free format text: ORIGINAL CODE: 0009272 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT MAINTAINED AS AMENDED |
|
27A | Patent maintained in amended form |
Effective date: 19890920 |
|
AK | Designated contracting states |
Kind code of ref document: B2 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
ITF | It: translation for a ep patent filed | ||
NLR2 | Nl: decision of opposition | ||
NLR3 | Nl: receipt of modified translations in the netherlands language after an opposition procedure | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19910708 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19910709 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19910712 Year of fee payment: 11 Ref country code: GB Payment date: 19910712 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19910716 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19910729 Year of fee payment: 11 Ref country code: DE Payment date: 19910729 Year of fee payment: 11 Ref country code: BE Payment date: 19910729 Year of fee payment: 11 |
|
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19910831 Year of fee payment: 11 |
|
EPTA | Lu: last paid annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19920818 Ref country code: GB Effective date: 19920818 Ref country code: AT Effective date: 19920818 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19920819 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19920831 Ref country code: CH Effective date: 19920831 Ref country code: BE Effective date: 19920831 |
|
BERE | Be: lapsed |
Owner name: L' AIR LIQUIDE S.A. POUR L'ETUDE ET L'EXPLOITATION Effective date: 19920831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19930301 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19920818 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19930430 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19930501 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 81401315.7 Effective date: 19930307 |
|
APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |