EP0618301B1 - Device for injecting preheated air into a shaft furnace - Google Patents
Device for injecting preheated air into a shaft furnace Download PDFInfo
- Publication number
- EP0618301B1 EP0618301B1 EP94101358A EP94101358A EP0618301B1 EP 0618301 B1 EP0618301 B1 EP 0618301B1 EP 94101358 A EP94101358 A EP 94101358A EP 94101358 A EP94101358 A EP 94101358A EP 0618301 B1 EP0618301 B1 EP 0618301B1
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- EP
- European Patent Office
- Prior art keywords
- refractory
- tubular element
- brick
- profiled
- ball joint
- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
- C21B7/163—Blowpipe assembly
Definitions
- the present invention relates to a device injection of preheated air into a built-in oven of several separate tubular elements consisting of a steel external shielding and internal coating in poured refractory concrete, connected two by two by one ball joint and a compensator.
- Preheated air injection devices plus generally known as “wind carriers", are exposed to mobility and leakage problems.
- wind carriers due to the high air temperature preheated (temperature of the order of 1200 ° C or more) and the high temperature inside the oven, the wall of the latter, as well as the supply line and the blower are exposed to expansion and thermal deformations causing relative displacements significant between the supply line and the oven wall.
- the wind carrier must therefore be in able to compensate for these relative displacements while preventing leakage of gas or preheated air.
- US Patent No. 3,766,868 provides a blast connection of the type described in the preamble.
- This wind carrier was subsequently perfected by the design of universal joints with a spherical joint of the kind described in document DE-C2-2218331.
- the articulations of this wind carrier allow the compensation of all relative movements between the supply line and the wall of the furnace.
- the tightness at the joints is ensured by bellows compensators, while the mechanical stability is ensured for example by associated cardanic connections, at the two universal joints, at the two opposite ends of the central tubular element.
- microcracks can form in certain places which are the cause of annoying circulations and vortices.
- the object of the present invention is to provide a new articulation system which is more resistant at the same time to the thermal and mechanical stresses to which it is subject.
- the system proposed by the present invention is essentially characterized in that that at least the convex patella of the spherical joint includes a profiled refractory brick anchored in the coating of interior refractory concrete.
- the radius of curvature of each ball joint is the order of magnitude of the external radius of the elements tubular. This small radius of curvature ensures better guiding the ball joints in their plate allowing the keeping the same thickness of the joint during angular movement.
- the coating in refractory steel extends to the convex part of the ball joint and ends with a projecting lip on which the profiled refractory brick is supported.
- the lip support combined with the reduced radius of curvature allows ensure that the supporting forces are always perpendicular to the radius of curvature. In this way, the risk of shards being ripped from the brick profiled refractory are eliminated.
- the concave plate can also be formed in brick profiled refractory anchored in the inner lining refractory concrete. This avoids the formation of microcracks and improve thermal insulation at level of the concave base of the patella.
- An insulating mat can, if necessary, be interposed between profiled refractory brick and exterior shielding.
- the ball joint and the tubular element can form a single block with the refractory lining of the tubular element, or the ball joint can constitute a separate element, mounted on the tubular element and separated from the inner lining of the latter by an annular seal.
- the shielding of the tubular element and that of the adjacent tubing can be connected directly to one the other through a compensator, or through a detachable flange or weld.
- a refractory soft seal between the ball joint and the plate can be partially attached to the shield and partially on the edge of the plate. He can also be partially attached to an interior housing of the cylindrical sheath and partially on the refractory. According to another variant, it can also be attached partially on the refractory and partially in a housing delimited by the upper part of the sheath and by a ring welded inside the shielding
- Figure 1 shows two tubular elements 10, 12 of a wind carriers connected by a ball joint 14 and a bellows compensator 16.
- the tubular elements 10, 12 include 18 refractory steel outer shield and an internal coating of cast refractory concrete 20.
- the hot wind passes through a central light 22 arranged in refractory concrete 20.
- the joint 14 is formed by a convex ball 24 and a concave plate 26.
- the ball joint 24 is formed by a refractory brick 28 streamlined.
- Brick has an annular surface anchor 29 specially studied which allows to fix it securely in the internal lining of refractory concrete casting 20.
- the convex part of the ball joint 24 has a radius of curvature which is between 0.8 and 1.2 times the radius outside of the tubular elements 10, 12.
- a sheath 30 in refractory steel extends to the convex part of the ball 24 and ends with a projecting lip 32 which forms a bearing surface for the brick 28.
- the convex ball 24 is connected to the element tubular 10 by a flange 34 and an annular seal 36. This facilitates the assembly and disassembly of the ball joint 24.
- a space 38 which is sealed on its periphery by a soft seal 40 fixed to the shield 18 and by a soft seal 42 which adheres to the outer edge of the plate 26.
- the seal slack 40 is attached to a housing 39 delimited by two rings welded inside the shield 18.
- Figure 2 shows another preferred embodiment of a hinge of a wind carrier.
- a insulating mat 44 has been introduced which ensures better thermal insulation of the convex ball joint 24 and the compensator 16.
- the anchoring surface 129 of the brick refractory 28 in the internal concrete lining cast refractory 20 has a dovetail shape. This particular shape of the anchoring surface 129 makes it possible to hold the refractory brick 28 in place and prevent it from move vertically and horizontally.
- Figure 3 shows yet another mode of preferred embodiment of a articulation of a wind carrier in which both the convex ball 24 and the trim hollow 26 are formed in refractory bricks profiles 28, 48.
- An advantage of this embodiment is that the formation of microcracks on the concave base is eliminated.
- a soft seal 142, attached to the refractory brick 48 of the concave plate 26, and the soft seal 40 ensure the tightness of the space provided between the convex ball 24 and the concave plate 26.
- Figure 4 shows a hinge of a wind carrier in which the convex ball 24 and the concave base 26 are formed from profiled refractory brick 28, 148.
- a insulating mat 130 is interposed between the steel shielding refractory 18 and brick 148 to improve insulation thermal.
- An anchor surface 229 in the shape of a tail dovetail "maintains the brick 148 in the coating of cast refractory concrete.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Joints Allowing Movement (AREA)
- Joining Of Building Structures In Genera (AREA)
- Physical Vapour Deposition (AREA)
- Slot Machines And Peripheral Devices (AREA)
Abstract
Description
La présente invention concerne un dispositif d'injection d'air préchauffé dans un four à cuve constitué de plusieurs éléments tubulaires distincts consistant en un blindage extérieur en acier et un revêtement intérieur en béton réfractaire coulé, relié deux à deux par une articulation sphérique et un compensateur.The present invention relates to a device injection of preheated air into a built-in oven of several separate tubular elements consisting of a steel external shielding and internal coating in poured refractory concrete, connected two by two by one ball joint and a compensator.
Les dispositifs d'injection d'air préchauffé, plus généralement connus sous le nom de "porte-vent", sont exposés à des problèmes de mobilité et d'étanchéité. En effet, par suite de la température élevée de l'air préchauffé (température de l'ordre de 1 200°C ou plus) et de la température élevée régnant à l'intérieur du four, la paroi de ce dernier, ainsi que la conduite d'alimentation et le porte-vent sont exposés à des dilatations et déformations thermiques causant des déplacements relatifs non-négligeables entre la conduite d'alimentation et la paroi du four. Il faut donc que le porte-vent soit en mesure de compenser ces déplacements relatifs tout en évitant des fuites de gaz ou d'air préchauffé.Preheated air injection devices, plus generally known as "wind carriers", are exposed to mobility and leakage problems. In effect, due to the high air temperature preheated (temperature of the order of 1200 ° C or more) and the high temperature inside the oven, the wall of the latter, as well as the supply line and the blower are exposed to expansion and thermal deformations causing relative displacements significant between the supply line and the oven wall. The wind carrier must therefore be in able to compensate for these relative displacements while preventing leakage of gas or preheated air.
Pour répondre à ces exigences, le brevet US No 3,766,868 propose un porte-vent du genre décrit dans le préambule. Ce porte-vent a, par la suite, été perfectionné par la conception d'articulations universelles à joint sphérique du genre décrit dans le document DE-C2-2218331. Les articulations de ce porte-vent permettent la compensation de tous les mouvements relatifs entre la conduite d'alimentation et la paroi du four. L'étanchéité au niveau des articulations est assurée par des compensateurs à soufflets, alors que la stabilité mécanique est assurée par exemple par des liaisons à cardan associées, au niveau des deux articulations universelles, aux deux extrémités opposées de l'élément tubulaire central. To meet these requirements, US Patent No. 3,766,868 provides a blast connection of the type described in the preamble. This wind carrier was subsequently perfected by the design of universal joints with a spherical joint of the kind described in document DE-C2-2218331. The articulations of this wind carrier allow the compensation of all relative movements between the supply line and the wall of the furnace. The tightness at the joints is ensured by bellows compensators, while the mechanical stability is ensured for example by associated cardanic connections, at the two universal joints, at the two opposite ends of the central tubular element.
L'endroit le plus sollicité et le plus délicat se situe toujours au niveau des articulations. En effet, la mobilité de la rotule par rapport à son assiette entraíne souvent des frottements de béton réfractaire sur du béton réfractaire. Le béton réfractaire de la pointe de la rotule peut être endommagé et des éclats peuvent éventuellement être arrachés.The most requested and the most delicate place is always at the joints. Indeed, mobility of the patella relative to its plate often leads friction of refractory concrete on concrete refractory. The refractory concrete of the tip of the ball joint may be damaged and possible splinters to be ripped off.
Aussi, vu les grandes variations de températures, des microfissures peuvent se former à certains endroits qui sont la cause de circulations et tourbillons gênants.Also, given the large temperature variations, microcracks can form in certain places which are the cause of annoying circulations and vortices.
Le brevet américain US 5,209,657 propose d'étendre le blindage métallique formant la gaine de la rotule jusqu'à la base diamétrale de la rotule convexe. Cette invention améliore grandement la stabilité mécanique des rotules convexes et permet un meilleur glissement de la rotule convexe dans l'assiette concave du segment adjacent.American patent US 5,209,657 proposes to extend the metal shield forming the sheath of the ball joint up the diametrical base of the convex patella. This invention greatly improves the mechanical stability of the ball joints convex and allows better sliding of the patella convex in the concave base of the adjacent segment.
Cependant à la longue, l'acier réfractaire formant la pointe de la rotule se calamine et toute la gaine de la rotule doit être remplacée.However in the long run, the refractory steel forming the tip of the patella calamine and the entire sheath of the ball joint must be replaced.
Le but de la présente invention est de prévoir un nouveau système d'articulations qui résiste mieux à la fois aux sollicitations thermiques et mécaniques auxquelles il est soumis.The object of the present invention is to provide a new articulation system which is more resistant at the same time to the thermal and mechanical stresses to which it is subject.
Pour atteindre cet objectif, le dispositif proposé par la présente invention est essentiellement caractérisé en ce qu'au moins la rotule convexe de l'articulation sphérique comprend une brique réfractaire profilée ancrée dans le revêtement en béton réfractaire intérieur.To achieve this objective, the system proposed by the present invention is essentially characterized in that that at least the convex patella of the spherical joint includes a profiled refractory brick anchored in the coating of interior refractory concrete.
La fabrication de la rotule convexe en brique réfractaire profilée permet de trouver un meilleur compromis entre la stabilité mécanique et la stabilité thermique. En effet, ces rotules en brique réfractaire profilée présentent une stabilité mécanique supérieure aux rotules formées en béton réfractaire coulé et possèdent une stabilité thermique supérieure aux rotules en béton réfractaire coulé muni d'une gaine de protection en acier réfractaire.The manufacture of the convex ball joint in brick profiled refractory allows to find a better compromise between mechanical stability and stability thermal. Indeed, these refractory brick ball joints profile have greater mechanical stability than ball joints formed from cast refractory concrete and have a greater thermal stability than concrete ball joints cast refractory with a steel protective sheath refractory.
Grâce au meilleur compromis entre la stabilité mécanique et la stabilité thermique, le risque que des microfissures se forment et que la rotule se dégrade est quasi inexistant. La maintenance devient plus facile et moins onéreuse.Thanks to the best compromise between stability mechanical and thermal stability, the risk that microcracks form and the patella degrades is almost inexistant. Maintenance becomes easier and less expensive.
Il est aussi important de souligner qu'une meilleure isolation thermique au niveau des rotules peut être atteinte.It is also important to emphasize that better thermal insulation at the ball joints can be reached.
Selon un premier mode de réalisation du porte-vent, le rayon de courbure de chaque articulation sphérique est de l'ordre de grandeur du rayon extérieur des éléments tubulaires. Ce faible rayon de courbure assure un meilleur guidage des rotules dans leur assiette permettant la conservation de la même épaisseur du joint lors du mouvement angulaire.According to a first embodiment of the wind carrier, the radius of curvature of each ball joint is the order of magnitude of the external radius of the elements tubular. This small radius of curvature ensures better guiding the ball joints in their plate allowing the keeping the same thickness of the joint during angular movement.
Selon un autre mode de réalisation, le revêtement en acier réfractaire s'étend jusqu'à la partie convexe de la rotule et se termine par une lèvre en saillie sur laquelle la brique réfractaire profilée prend appui. La lèvre d'appui combinée au rayon de courbure réduit permet de garantir que les forces d'appui sont toujours perpendiculaires au rayon de courbure. De cette manière, les risques que des éclats ne soient arrachés de la brique réfractaire profilée sont éliminés.According to another embodiment, the coating in refractory steel extends to the convex part of the ball joint and ends with a projecting lip on which the profiled refractory brick is supported. The lip support combined with the reduced radius of curvature allows ensure that the supporting forces are always perpendicular to the radius of curvature. In this way, the risk of shards being ripped from the brick profiled refractory are eliminated.
L'assiette concave peut également être formée en brique réfractaire profilée ancrée dans le revêtement intérieur en béton réfractaire. Ceci permet d'éviter la formation de microfissures et d'améliorer l'isolation thermique au niveau de l'assiette concave de la rotule.The concave plate can also be formed in brick profiled refractory anchored in the inner lining refractory concrete. This avoids the formation of microcracks and improve thermal insulation at level of the concave base of the patella.
Un tapis isolant peut, au besoin, être interposé entre la brique réfractaire profilée et le blindage extérieur.An insulating mat can, if necessary, be interposed between profiled refractory brick and exterior shielding.
La rotule et l'élément tubulaire peuvent former un seul bloc avec le revêtement réfractaire de l'élément tubulaire, ou bien la rotule peut constituer un élément séparé, monté sur l'élément tubulaire et séparé du revêtement intérieur de ce dernier par un joint annulaire.The ball joint and the tubular element can form a single block with the refractory lining of the tubular element, or the ball joint can constitute a separate element, mounted on the tubular element and separated from the inner lining of the latter by an annular seal.
Le blindage de l'élément tubulaire et celui de la tubulure adjacente peuvent être reliés directement l'un à l'autre à travers un compensateur, ou par l'intermédiaire d'une bride ou d'une soudure détachable.The shielding of the tubular element and that of the adjacent tubing can be connected directly to one the other through a compensator, or through a detachable flange or weld.
Un joint mou réfractaire entre la rotule et l'assiette peut être attaché partiellement sur le blindage et partiellement sur le bord de l'assiette. Il peut également être attaché partiellement dans un logement intérieur de la gaine cylindrique et partiellement sur le réfractaire. Selon une autre variante, il peut également être attaché partiellement sur le réfractaire et partiellement dans un logement délimité par la partie supérieure de la gaine et par un anneau soudé à l'intérieur du blindageA refractory soft seal between the ball joint and the plate can be partially attached to the shield and partially on the edge of the plate. He can also be partially attached to an interior housing of the cylindrical sheath and partially on the refractory. According to another variant, it can also be attached partially on the refractory and partially in a housing delimited by the upper part of the sheath and by a ring welded inside the shielding
D'autres particularités et caractéristiques ressortiront de la description détaillée de plusieurs modes de réalisation, présentés ci-dessous, à titre d'illustration, en référence aux Figures annexées dans lesquelles :
- la Figure 1 représente une coupe axiale d'une articulation sphérique d'un porte-vent dont la rotule convexe est formée en brique réfractaire profilée;
- la Figure 2 montre une coupe axiale d'une articulation sphérique d'un porte-vent dont la rotule convexe est formée en brique réfractaire profilée selon un autre mode de réalisation préféré;
- la Figure 3 représente une coupe axiale d'une articulation sphérique d'un porte-vent dont la rotule et l'assiette sont formées en brique réfractaire profilée;
- la Figure 4 montre un autre mode de réalisation préféré d'une articulation d'un porte-vent en coupe axiale.
- Figure 1 shows an axial section of a spherical articulation of a wind-blower whose convex ball joint is formed from profiled refractory brick;
- Figure 2 shows an axial section of a spherical articulation of a wind carrier whose convex ball is formed in profiled refractory brick according to another preferred embodiment;
- Figure 3 shows an axial section of a spherical articulation of a wind-blower whose ball joint and base are formed from profiled refractory brick;
- Figure 4 shows another preferred embodiment of an articulation of a wind carrier in axial section.
La Figure 1 montre deux éléments tubulaires 10, 12 d'un
porte-vent reliés par une articulation sphérique 14 et un
compensateur à soufflet 16. Les éléments tubulaires 10, 12
comprennent un blindage extérieur en acier réfractaire 18
et un revêtement interne en béton réfractaire coulé 20. Le
vent chaud passe à travers une lumière centrale 22 aménagée
dans le béton réfractaire 20. L'articulation 14 est formée
par une rotule convexe 24 et une assiette concave 26. La
rotule 24 est formée par une brique réfractaire 28
profilée. La brique comprend une surface annulaire
d'ancrage 29 spécialement étudiée qui permet de la fixer
solidement dans le revêtement interne en béton réfractaire
coulée 20.Figure 1 shows two
La partie convexe de la rotule 24 a un rayon de
courbure qui est compris entre 0,8 et 1,2 fois le rayon
extérieur des éléments tubulaires 10, 12. Une gaine 30 en
acier réfractaire s'étend jusqu'à la partie convexe de la
rotule 24 et se termine par une lèvre saillante 32 qui
forme une surface d'appui pour la brique 28.The convex part of the
La rotule convexe 24 est reliée à l'élément
tubulaire 10 par une bride 34 et un joint 36 annulaire.
Ceci facilite le montage et le démontage de la rotule 24.The
Entre la rotule 24 et l'assiette 26 est aménagé un
espace 38 qui est étanchéifié sur sa périphérie par un
joint mou 40 fixé au blindage 18 et par un joint mou 42 qui
adhère sur le bord extérieur de l'assiette 26. Le joint
mou 40 est attaché dans un logement 39 délimité par deux
anneaux soudés à l'intérieur du blindage 18.Between the
La Figure 2 montre un autre mode de réalisation préféré
d'une articulation d'un porte-vent. Entre la gaine en acier
réfractaire 30 et la brique réfractaire 28 profilée, un
tapis isolant 44 a été introduit qui assure une meilleure
isolation thermique de la rotule convexe 24 et du
compensateur 16. La surface d'ancrage 129 de la brique
réfractaire 28 dans le revêtement interne en béton
réfractaire coulé 20 a une forme en "queue d'aronde". Cette
forme particulière de la surface d'ancrage 129 permet de
maintenir la brique réfractaire 28 en place et l'empêche de
se déplacer verticalement et horizontalement. Figure 2 shows another preferred embodiment
of a hinge of a wind carrier. Between the steel sheath
refractory 30 and
La Figure 3 représente encore un autre mode de
réalisation préféré d'une articulation d'un porte-vent dans
laquelle aussi bien la rotule convexe 24 que l'assiette
creuse 26 sont formées en briques réfractaires
profilées 28, 48.Figure 3 shows yet another mode of
preferred embodiment of a articulation of a wind carrier in
which both the
Un avantage de ce mode de réalisation est que la formation de microfissures au niveau de l'assiette concave est éliminée.An advantage of this embodiment is that the formation of microcracks on the concave base is eliminated.
Un joint mou 142, attaché à la brique réfractaire 48 de
l'assiette concave 26, et le joint mou 40 assurent
l'étanchéité de l'espace aménagé entre la rotule convexe 24
et l'assiette concave 26.A
La Figure 4 représente une articulation d'un porte-vent
dans lequel la rotule convexe 24 et l'assiette concave 26
sont formées en brique réfractaire profilée 28, 148. Un
tapis isolant 130 est interposé entre le blindage en acier
réfractaire 18 et la brique 148 pour améliorer l'isolation
thermique. Une surface d'ancrage 229 en forme de "queue
d'aronde" assure le maintien de la brique 148 dans le
revêtement en béton réfractaire coulé.Figure 4 shows a hinge of a wind carrier
in which the
Sur les Figures 2, 3 et 4 on voit que la rotule convexe
est solidaire de l'élément tubulaire 10.In Figures 2, 3 and 4 we see that the convex ball joint
is integral with the
Claims (9)
- Device for blowing preheated air into a shaft furnace, comprising a first and second tubular element (10, 12), each fitted with an outer shielding (18) made of refractory steel and with an inner refractory lining made of cast refractory concrete (20), the two tubular elements (10, 12) being connected by a ball joint (14) and a compensator (16), and the said ball joint (14) including a convex pivot (24) which is integral with the first tubular element and which can pivot in a concave dish (26) integral with a second tubular element, characterized in that at least the convex pivot (24) of the ball joint comprises a profiled refractory brick (28) anchored in the inner refractory lining (20) made of cast refractory concrete.
- Device according to Claim 1, characterized in that a sheath (30) made of refractory steel extends up to the convex part of the pivot (24) and terminates in a projecting lip (32) which forms a bearing surface for the profiled refractory brick (28).
- Device according to Claims 1 and 2, characterized in that the radius of curvature of the ball joint (14) is of the order of magnitude of the external radius of the two tubular elements (10, 12).
- Device according to any one of Claims 1, 2 or 3, characterized in that the concave dish (26) of the joint (14) comprises a profiled refractory brick anchored in the inner refractory lining (20).
- Device according to Claims 1 to 4, characterized in that an insulating jacket (44) is interposed between the refractory brick (28) and the refractory steel sheath (30).
- Device according to any one of Claims 1 to 5, characterized in that the refractory concrete in which the profiled brick (28) is anchored forms a single piece with the refractory lining (20) of the first tubular element.
- Device according to any one of Claims 1 to 5, characterized in that the pivot (24) constitutes a separate element mounted on the tubular element (10) and separated from the inner refractory lining of the latter by an annular seal (36).
- Device according to any one of Claims 1 to 7, characterized in that refractory seals (40, 42) are attached on the shielding (18) of the second tubular element (12) and on the edge of the concave dish (26).
- Device according to any one of Claims 1 to 7, characterized in that the refractory seal is partially attached in a housing (39) inside the tubular element and partially on the refractory.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU88241 | 1993-03-31 | ||
| LU88241A LU88241A1 (en) | 1993-03-31 | 1993-03-31 | Device for injecting preheated air into a shaft furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0618301A1 EP0618301A1 (en) | 1994-10-05 |
| EP0618301B1 true EP0618301B1 (en) | 1998-08-12 |
Family
ID=19731397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94101358A Expired - Lifetime EP0618301B1 (en) | 1993-03-31 | 1994-01-31 | Device for injecting preheated air into a shaft furnace |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5462433A (en) |
| EP (1) | EP0618301B1 (en) |
| AT (1) | ATE169684T1 (en) |
| BR (1) | BR9400898A (en) |
| CZ (1) | CZ283132B6 (en) |
| DE (1) | DE4404316C2 (en) |
| ES (1) | ES2121101T3 (en) |
| LU (1) | LU88241A1 (en) |
| SK (1) | SK281401B6 (en) |
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| CN100593680C (en) * | 2006-01-27 | 2010-03-10 | 宝山钢铁股份有限公司 | Inside lining structure of hot-air pipe expansion joint of blast heating furnace |
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| EP1105950B1 (en) | 1998-08-20 | 2003-10-15 | Orbotech Ltd. | Laser repetition rate multiplier |
| IL133889A (en) | 2000-01-05 | 2007-03-08 | Orbotech Ltd | Pulse light pattern writer |
| US6176526B1 (en) | 1999-01-04 | 2001-01-23 | Lever Brother Company Division Of Conopco | Expansion joint |
| DE19905649A1 (en) * | 1999-02-11 | 2000-08-17 | Kloeckner Humboldt Wedag | Compensator to compensate for thermal expansion |
| DE10219469B4 (en) * | 2002-04-30 | 2004-08-05 | Alfred Liebig | Joint compensator |
| CN100404696C (en) * | 2006-07-04 | 2008-07-23 | 世林（漯河）冶金设备有限公司 | Corrugated expansion joint of blast furnace air inlet device |
| NL2003916C2 (en) * | 2009-12-07 | 2011-06-09 | Heatteq Refractory Holding B V | Hot blast transportation apparatus, comprising a refractory lining contained within a steel outer shell. |
| DE102010007122A1 (en) * | 2010-02-05 | 2011-08-11 | SAB S.àr.l. | nozzle |
| DE102010015842A1 (en) | 2010-03-05 | 2011-09-08 | Z & J Technologies Gmbh | Hot blast nozzle stick for a shaft furnace, in particular blast furnace |
| LU91897B1 (en) * | 2011-11-09 | 2013-05-10 | Wurth Paul Sa | Airtight connection system between a nozzle and a hot blast supply nozzle for a shaft furnace, and iron and steel blast furnace comprising such a system |
| CN107228249A (en) * | 2017-05-17 | 2017-10-03 | 洛阳双瑞特种装备有限公司 | It is a kind of to prevent the hinge type expansion joint of material abrasion bellows |
| LU102097B1 (en) | 2020-09-28 | 2022-03-29 | Wurth Paul Sa | Reducing gas injection System |
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| BE748939A (en) * | 1969-04-21 | 1970-09-16 | Wurth Anciens Ets Paul | |
| LU63079A1 (en) * | 1971-04-29 | 1971-08-27 | ||
| US3766868A (en) * | 1972-02-22 | 1973-10-23 | Anciens Etablissements P Warth | Tuyere stock for furnaces |
| LU64911A1 (en) * | 1972-03-06 | 1972-07-06 | ||
| DE7325087U (en) * | 1973-07-07 | 1973-11-08 | Steinfurter Eisenwerk Gmbh | Nozzle holder |
| LU70943A1 (en) * | 1974-09-18 | 1975-03-06 | ||
| US5209657A (en) * | 1990-11-09 | 1993-05-11 | Paul Wurth S.A. | Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints |
| LU87838A1 (en) * | 1990-11-09 | 1992-08-25 | Wurth Paul Sa | DEVICE FOR INJECTING PREHEATED AIR INTO A TANK OVEN AND METHOD FOR MANUFACTURING BALLS CONVEXED WITH SPHERICAL ARTICULATIONS |
-
1993
- 1993-03-31 LU LU88241A patent/LU88241A1/en unknown
-
1994
- 1994-01-31 ES ES94101358T patent/ES2121101T3/en not_active Expired - Lifetime
- 1994-01-31 EP EP94101358A patent/EP0618301B1/en not_active Expired - Lifetime
- 1994-01-31 AT AT94101358T patent/ATE169684T1/en not_active IP Right Cessation
- 1994-02-11 DE DE4404316A patent/DE4404316C2/en not_active Expired - Fee Related
- 1994-03-14 US US08/212,229 patent/US5462433A/en not_active Expired - Lifetime
- 1994-03-25 BR BR9400898A patent/BR9400898A/en not_active IP Right Cessation
- 1994-03-28 SK SK367-94A patent/SK281401B6/en not_active IP Right Cessation
- 1994-03-29 CZ CZ94738A patent/CZ283132B6/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100593680C (en) * | 2006-01-27 | 2010-03-10 | 宝山钢铁股份有限公司 | Inside lining structure of hot-air pipe expansion joint of blast heating furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4404316C2 (en) | 2002-11-21 |
| SK36794A3 (en) | 1994-10-05 |
| DE4404316A1 (en) | 1994-10-06 |
| BR9400898A (en) | 1994-11-22 |
| EP0618301A1 (en) | 1994-10-05 |
| CZ283132B6 (en) | 1998-01-14 |
| SK281401B6 (en) | 2001-03-12 |
| ATE169684T1 (en) | 1998-08-15 |
| US5462433A (en) | 1995-10-31 |
| CZ73894A3 (en) | 1995-08-16 |
| ES2121101T3 (en) | 1998-11-16 |
| LU88241A1 (en) | 1994-10-03 |
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