EP0199662B1 - Apparatus for injecting pulverised material, especially coal dust into a blast furnace - Google Patents

Apparatus for injecting pulverised material, especially coal dust into a blast furnace Download PDF

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Publication number
EP0199662B1
EP0199662B1 EP86440021A EP86440021A EP0199662B1 EP 0199662 B1 EP0199662 B1 EP 0199662B1 EP 86440021 A EP86440021 A EP 86440021A EP 86440021 A EP86440021 A EP 86440021A EP 0199662 B1 EP0199662 B1 EP 0199662B1
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Prior art keywords
nozzle
pipe
blast furnace
twyere
axis
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Expired
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EP86440021A
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German (de)
French (fr)
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EP0199662A1 (en
Inventor
Yann De Lassat De Pressigny
Michel Schneider
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Institut de Recherches de la Siderurgie Francaise IRSID
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Institut de Recherches de la Siderurgie Francaise IRSID
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Priority to AT86440021T priority Critical patent/ATE45593T1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/002—Heated electrically (plasma)

Definitions

  • the invention relates to the injection of pulverulent materials into a blast furnace, and in particular coal.
  • a known injection device comprises a hot-wind nozzle opening into the blast furnace, a nozzle blocked against the nozzle and coaxial with the latter for the supply of hot wind, a connection produced obliquely on the nozzle and oriented towards the nozzle , and an injection rod passing through this connection and opening into the nozzle.
  • the injection rod is a straight rod whose inclination on the axis of the nozzle is that of the nozzle of the nozzle, generally 15 °.
  • the object of the invention is to propose a new injection device having more flexibility and making it possible to explore a larger region of the nozzle to stop there the choice of the ideal position of the discharge end of the cane d 'injection.
  • the invention achieves its object by the fact that the axis of the injection rod is substantially an arc, the convexity of which is turned towards the axis of the nozzle and the nozzle. Indeed, thanks to this curved rod, it is possible by an adequate movement of rotation of the rod around its center of curvature, to make it penetrate for quite long distances inside the nozzle, while retaining a suitable inclination of the end of the rod on the axis of the nozzle.
  • the radius of curvature of the rod is at least equal to a hundred times its internal diameter.
  • a sufficiently large radius of curvature has the additional advantage of being able to provide a nozzle for the nozzle, the internal passage of which has a section making it possible to accommodate either a straight rod or a curved rod.
  • the adaptation of the curved rod makes it possible to advance its discharge orifice sufficiently in front of the nozzle to avoid the problems linked to the excessive temperature (and to the mechanical abrasion of the coal).
  • a cooling system is advantageously provided for the rod itself, as well as for the nozzle and its tapping.
  • FIG. 1 shows the wind nozzle 1 conventionally fixed on the shield 2 of the blast furnace by means of the tympe 3 and the chapel 4.
  • the nose 5 of the nozzle 1 opens inside the blast furnace above the crucible.
  • the nozzle 6 Locked against a spherical bearing at the rear of the nozzle 1, the nozzle 6 follows it coaxially, to conduct the hot wind which it receives from the wind-bend elbow 7 and from the other known organs for bringing the wind to blast furnace.
  • the nozzle 6 has an oblique connection 8, inclined at 15 ° on the axis 9 of the nozzle and the nozzle, and provided for the insertion of an injection rod.
  • the injection rod is a straight rod whose axis is coincident or parallel with the axis 10 of the nozzle 8. It opens into the nozzle, at the point of intersection of the axes 9 and 10, that is to say that it penetrates into the nozzle over a distance of about 7 cm at best, compared to the 50 to 60 cm length of the nozzle.
  • the rod is curved, as shown in dashes in FIG. 2, its axis 11. This forms an arc of a circle whose radius is at least equal to a hundred times the internal radius of the rod to avoid problems of cane wear by the coal it carries.
  • an injection rod whose internal diameter is 20 mm, and the radius of curvature is 3600 mm.
  • the rod by a displacement (rotation having for center the center of curvature of the rod) during which its axis 11 always remains located on the same circle, the exit orifice of the rod s' moving more or less from point J forwards or backwards: in all cases, the rod opens into the nozzle at an angle less than the inclination of the axis 10.
  • the section of the internal passage 12 of the nozzle 8 of the nozzle is advantageously that shown in FIG. 3, formed by two semicircles connected by two rectilinear parts.
  • the radius of these semicircles and the length of the straight parts is 25 mm.
  • This shape allows the choice, without changing the nozzle, of the curved rod of the invention or of a traditional straight rod.
  • the invention finds a more particularly advantageous application when, as known per se, a plasma torch 13 (fig. 1) is used to overheat the wind.
  • the nozzle 6 is lined with a refractory 14 and provided with a water cooling system 15 (FIGS. 1 and 3).
  • the high temperature allows the coal to burn as soon as it leaves the injection pipe. It is therefore important to make the outlet of the injection rod penetrate further into the nozzle, compared to the conventional installation of a rigid rod, in order to promote the holding of the nozzle.
  • the curved rod according to the invention solves this problem.
  • the curved rod must also be able to withstand the high temperatures encountered when using a plasma torch. This is why a rod is provided for cooling, for example by one of the following three arrangements.
  • a double annular circulation jacket formed of water is produced around the central duct of the rod carrying the mixture of air and coal. Given the limited space available, it is cooling by a water slide (approximately 2 mm thick): the same ultra-pure, deionized and demineralized water is advantageously used for this purpose. , required for cooling the plasma torch.
  • the central duct of the rod is surrounded by an annular air injection chamber under high flow (for example 80 m 3 / h ) .
  • the central conduit 16 (cf. fig. 3) is surrounded by an annular chamber 17 into which a liquid hydrocarbon is injected.

Abstract

The invention relates to a device for injecting pulverulent material, such as coal, into a blast furnace. The device includes a hot blast tuyere issuing into the blast furnace, a nozzle fixed against said tuyere and co-axial thereto for bringing the hot blast, a branch connection produced obliquely on the nozzle and directed towards the tuyere, and an injection pipe traversing the branch connection to issue into the tuyere. According to the invention, the injection pipe is substantially an arc of circle, the convexity of which is directed towards the axis of the nozzle and of the tuyere. The radius of curvature is at least equal to one hundred times its inner diameter.

Description

L'invention concerne l'injection de matières pulvérulentes dans un haut-fourneau, et notamment de charbon.The invention relates to the injection of pulverulent materials into a blast furnace, and in particular coal.

On sait que l'injection de charbon pulvérisé permet de réduire la consommation de coke dans le haut-fourneau. Ce charbon est introduit par une canne d'injection dans le vent chaud en provenance des cowpers.It is known that the injection of pulverized coal makes it possible to reduce the consumption of coke in the blast furnace. This coal is introduced through an injection pipe into the hot wind from the cowpers.

Un dispositif d'injection connu comporte une tuyère à vent chaud débouchant dans le haut fourneau, un busillon bloqué contre le tuyère et coaxial à celle-ci pour l'amenée du vent chaud, un piquage réalisé obliquement sur le busillon et orienté vers la tuyère, et une canne d'injection passant dans ce piquage et débouchant dans la tuyère. Dans ce dispositif connu, la canne d'injection est une canne droite dont l'inclinaison sur l'axe de la tuyère est celle du piquage du busillon, soit généralement 15°.A known injection device comprises a hot-wind nozzle opening into the blast furnace, a nozzle blocked against the nozzle and coaxial with the latter for the supply of hot wind, a connection produced obliquely on the nozzle and oriented towards the nozzle , and an injection rod passing through this connection and opening into the nozzle. In this known device, the injection rod is a straight rod whose inclination on the axis of the nozzle is that of the nozzle of the nozzle, generally 15 °.

Il apparaît que cette technologie, satisfaisante sous bien des rapports, présente cependant l'inconvénient de manquer de souplesse. Plus précisément, cette technologie ne permet pas de modifier facilement la position de l'extrémité de décharge de la canne d'injection par rapport à la tuyère. Or le choix idéal de cette position n'est pas facile à connaître car il dépend de paramètres agissant en sens contraires; selon les uns il est préférable que la canne pénètre le plus en avant possible dans la tuyère, alors que selon les autres la canne ne doit pas pénétrer trop en avant. La canne droite inclinée à 15° ne permet pas de s'écarter, sans inconvénients majeurs pour la qualité de l'injection elle-même, de la position normale. Des dispositifs connus selon l'art antérieur sont décrits par exemple dans FR-A-586 015 et DE-A-1 433 317.It appears that this technology, satisfactory in many respects, has the disadvantage of lacking flexibility. More precisely, this technology does not allow the position of the discharge end of the injection rod to be easily modified relative to the nozzle. Now the ideal choice of this position is not easy to know because it depends on parameters acting in opposite directions; according to some it is preferable that the rod penetrates as far forward as possible into the nozzle, while according to others the rod should not penetrate too far forward. The straight rod tilted at 15 ° does not allow deviation, without major drawbacks for the quality of the injection itself, from the normal position. Known devices according to the prior art are described for example in FR-A-586,015 and DE-A-1,433,317.

Le but de l'invention est de proposer un nouveau dispositif d'injection présentant plus de souplesse et permettant d'explorer une plus grande région de la tuyère pour y arrêter le choix de la position idéale de l'extrémité de décharge de la canne d'injection.The object of the invention is to propose a new injection device having more flexibility and making it possible to explore a larger region of the nozzle to stop there the choice of the ideal position of the discharge end of the cane d 'injection.

L'invention atteint son but par le fait que l'axe de la canne d'injection est sensiblement un arc de cercle dont le convexité est tournée vers l'axe du busillon et de la tuyère. En effet, grâce à cette canne courbe, il est possible par un mouvement adéquat de rotation de la canne autour de son centre de courbure, de la faire pénétrer sur d'assez grandes distances à l'intérieur de la tuyère, tout en conservant une inclinaison convenable de l'extrémité de la canne sur l'axe de la tuyère.The invention achieves its object by the fact that the axis of the injection rod is substantially an arc, the convexity of which is turned towards the axis of the nozzle and the nozzle. Indeed, thanks to this curved rod, it is possible by an adequate movement of rotation of the rod around its center of curvature, to make it penetrate for quite long distances inside the nozzle, while retaining a suitable inclination of the end of the rod on the axis of the nozzle.

Pour éviter une usure intempestive de la canne courbe, il est souhaitable que le rayon de courbure de la canne soit au moins égal à cent fois son diamètre intérieur.To avoid untimely wear of the curved rod, it is desirable that the radius of curvature of the rod is at least equal to a hundred times its internal diameter.

Du reste, un rayon de courbure trop petit ne permettrait pas le logement de la canne et son extraction, dans l'agencement traditionnel de la tuyère et des organes voisins.Moreover, a radius of curvature too small would not allow the housing of the rod and its extraction, in the traditional arrangement of the nozzle and the neighboring members.

Un rayon de courbure suffisamment grand présente l'avantage supplémentaire de pouvoir prévoir un piquage du busillon dont le passage interne a une section permettant indiféremment d'y loger une canne droite ou une canne courbe.A sufficiently large radius of curvature has the additional advantage of being able to provide a nozzle for the nozzle, the internal passage of which has a section making it possible to accommodate either a straight rod or a curved rod.

Des avantages encore plus considérables sont à attendre de l'invention, lorsqu'on utilise, comme cela est connu en soi, une torche à plasma pour surchauffer le vent chaud provenant des cowpers, et améliorer l'économie générale du haut-fourneau.Even more considerable advantages are to be expected from the invention, when a plasma torch is used, as is known per se, to overheat the hot wind coming from the cowpers, and improve the general economy of the blast furnace.

La surchauffe conduit en effet le charbon à brûler plus tôt (pratiquement dès sa sortie de la canne) et se pose alors le double problème de la résistance à la chaleur de la canne elle-même et de la tuyère.Overheating leads the coal to burn earlier (practically as soon as it leaves the cane) and there is then the double problem of the heat resistance of the cane itself and of the nozzle.

Selon l'invention, l'adaptation de la canne courbe permet d'avancer son orifice de décharge suffisamment en avant de la tuyère pour éviter les problèmes liés à la température excessive (et à l'abrasion mécanique du charbon).According to the invention, the adaptation of the curved rod makes it possible to advance its discharge orifice sufficiently in front of the nozzle to avoid the problems linked to the excessive temperature (and to the mechanical abrasion of the coal).

Par ailleurs, on prévoit avantageusement un système de refroidissement pour la canne elle-même, de même que pour le busillon et son piquage.In addition, a cooling system is advantageously provided for the rod itself, as well as for the nozzle and its tapping.

D'autres caractéristiques et avantages ressortiront de la description suivante d'un mode préféré de réalisation de l'invention. Il sera fait référence aux dessins annexés, sur lesquels:

  • - la figure 1 est une vue en coupe longitudinale d'une tuyère de haut-fourneau et des organes annexes, dans l'ensemble desquels s'insère le dispositif de l'invention,
  • - la figure 2 est une coupe longitudinale schématique montrant la tuyère, le busillon, le piquage du busillon et l'implantation respective des axes d'une canne d'injection traditionelle et d'une canne conforme à l'invention (pour des raisons de lisibilité de la figure, on n'a représenté les cannes que par leur axe, et non par leur profil réel),
  • - la figure 3 est une coupe transversale III-III de la figure 2, montrant la forme du passage interne du piquage du busillon et de la canne d'injection qu'il loge.
Other characteristics and advantages will emerge from the following description of a preferred embodiment of the invention. Reference will be made to the accompanying drawings, in which:
  • FIG. 1 is a view in longitudinal section of a blast furnace nozzle and of the annexed members, in the assembly of which the device of the invention is inserted,
  • - Figure 2 is a schematic longitudinal section showing the nozzle, the nozzle, the nozzle of the nozzle and the respective location of the axes of a traditional injection cane and a cane according to the invention (for reasons of legibility of the figure, the rods have only been represented by their axis, and not by their actual profile),
  • - Figure 3 is a cross section III-III of Figure 2, showing the shape of the internal passage of the nozzle of the nozzle and the injection rod that it houses.

La figure 1 montre la tuyère à vent 1 fixée de façon classique sur le blindage 2 du haut-fourneau par l'intermédiaire de la tympe 3 et de la chapelle 4.FIG. 1 shows the wind nozzle 1 conventionally fixed on the shield 2 of the blast furnace by means of the tympe 3 and the chapel 4.

Le nez 5 de la tuyère 1 débouche à l'intérieur du haut-fourneau au dessus du creuset.The nose 5 of the nozzle 1 opens inside the blast furnace above the crucible.

Bloqué contre une portée sphérique à l'arrière de la tuyère 1, le busillon 6 lui fait suite coaxiale- ment, pour conduire le vent chaud qu'il reçoit du coude porte-vent 7 et des autres organes connus d'amenée du vent au haut-fourneau.Locked against a spherical bearing at the rear of the nozzle 1, the nozzle 6 follows it coaxially, to conduct the hot wind which it receives from the wind-bend elbow 7 and from the other known organs for bringing the wind to blast furnace.

Le busillon 6 comporte un piquage oblique 8, incliné à 15° sur l'axe 9 du busillon et de la tuyère, et prévu pour l'insertion d'une canne d'injection.The nozzle 6 has an oblique connection 8, inclined at 15 ° on the axis 9 of the nozzle and the nozzle, and provided for the insertion of an injection rod.

Selon la technique antérieure, la canne d'injection est une canne droite dont l'axe est confondu ou parallèle avec l'axe 10 du piquage 8. Elle débouche dans la tuyère, au niveau du point d'intersection des axes 9 et 10, c'est-à-dire qu'elle pénètre dans la tuyère sur une distance d'environ 7 cm au mieux, à comparer aux 50 à 60 cm de longueur de la tuyère.According to the prior art, the injection rod is a straight rod whose axis is coincident or parallel with the axis 10 of the nozzle 8. It opens into the nozzle, at the point of intersection of the axes 9 and 10, that is to say that it penetrates into the nozzle over a distance of about 7 cm at best, compared to the 50 to 60 cm length of the nozzle.

Selon l'invention, la canne est courbe, comme le montre en tirets sur la figure 2, son axe 11. Celui-ci forme un arc de cercle dont le rayon est au moins égal à cent fois le rayon interne de la canne pour éviter les problèmes d'usure de la canne par le charbon qu'elle véhicule.According to the invention, the rod is curved, as shown in dashes in FIG. 2, its axis 11. This forms an arc of a circle whose radius is at least equal to a hundred times the internal radius of the rod to avoid problems of cane wear by the coal it carries.

Pour donner un exemple concret, il a été prévu dans un exemple particulier de réalisation, une canne d'injection dont le diamètre intérieur est de 20 mm, et le rayon de courbure est de 3600 mm.To give a concrete example, there has been provided in a particular embodiment, an injection rod whose internal diameter is 20 mm, and the radius of curvature is 3600 mm.

Grâce à la courbure de la canne, il est possible de la faire déboucher au point J, intersection des axes 9 et 11, situé dans la tuyère bien plus en avant que 1 (44,5cm au lieu de 7cm dans l'exemple particulier précité). Elle y débouche par ailleurs sous un angle plus faible que l'inclinaison (15°) de l'axe 10 sur l'axe 9, ce qui s'avère favorable à l'exploitation normale du procédé d'injection mais également à son réglage initial ou à l'expérimentation.Thanks to the curvature of the cane, it is possible to open it at point J, intersection of axes 9 and 11, located in the nozzle much further forward than 1 (44.5cm instead of 7cm in the particular example above ). It also opens out at an angle smaller than the inclination (15 °) of axis 10 on axis 9, which proves favorable for the normal operation of the injection process but also for its adjustment. initial or experimentation.

En effet, il est possible de déplacer la canne par un déplacement (rotation ayant pour centre le centre de courbure de la canne) au cours duquel son axe 11 reste toujours situé sur le même cercle, l'orifice de sortie de la canne s'éloignant plus ou moins du point J en avant ou en arrière: dans tous les cas, la canne débouche dans la tuyère sous un angle inférieur à l'inclinaison de l'axe 10. On peut ainsi dans une plage de réglage de l'ordre du mètre explorer une gamme de positions de l'orifice de sortie de la canne, en maintenant celui-ci relativement proche de l'axe de la tuyère mais en variant sa pénétration dans celle-ci et trouver ainsi plus facilement le compromis entre les facteurs contraires qui règlent le choix de l'emplacement idéal: d'une part réduire l'abrasion des parois de tuyère par le charbon, ce qui tend à placer l'orifice de sortie de la canne d'injection le plus en avant; d'autre part faire brûler le charbon le plus sûrement possible et le plus tôt avec l'oxygène encore disponible, ce qui tend à reculer l'orifice de sortie de la canne d'injection.Indeed, it is possible to move the rod by a displacement (rotation having for center the center of curvature of the rod) during which its axis 11 always remains located on the same circle, the exit orifice of the rod s' moving more or less from point J forwards or backwards: in all cases, the rod opens into the nozzle at an angle less than the inclination of the axis 10. It is thus possible within a range of adjustment of the order of the meter explore a range of positions of the cane outlet, keeping it relatively close to the axis of the nozzle but varying its penetration therein and thus more easily find the compromise between the factors opposites which regulate the choice of the ideal location: on the one hand to reduce the abrasion of the nozzle walls by coal, which tends to place the outlet port of the injection rod most forward; on the other hand to burn the coal as surely as possible and as soon as possible with the oxygen still available, which tends to draw back the outlet orifice of the injection rod.

La section du passage interne 12 du piquage 8 du busillon est avantageusement celle représentée en figure 3, formée par deux demi-cercles raccordés par deux parties rectilignes. Dans l'exemple particulier de réalisation déjà mentionné, le rayon de ces demi-cercles et la longueur des parties rectilignes est de 25 mm.The section of the internal passage 12 of the nozzle 8 of the nozzle is advantageously that shown in FIG. 3, formed by two semicircles connected by two rectilinear parts. In the particular embodiment already mentioned, the radius of these semicircles and the length of the straight parts is 25 mm.

Cette forme permet le passage au choix, sans changer de busillon, de la canne courbe de l'invention ou d'une canne rectiligne traditionelle.This shape allows the choice, without changing the nozzle, of the curved rod of the invention or of a traditional straight rod.

L'invention trouve une application plus particulièrement avantageuse lorsque, comme connu en soi, on utilise une torche à plasma 13 (fig. 1) pour surchauffer le vent. Le busillon 6 est garni de réfractaire 14 et muni d'un système de refroidissement par eau 15 (fig. 1 et 3).The invention finds a more particularly advantageous application when, as known per se, a plasma torch 13 (fig. 1) is used to overheat the wind. The nozzle 6 is lined with a refractory 14 and provided with a water cooling system 15 (FIGS. 1 and 3).

La température élevée permet au charbon de brûler dès sa sortie de la canne d'injection. Aussi est-il important de faire pénétrer la sortie de la canne d'injection plus en avant dans la tuyère, par rapport à l'implantation classique d'une canne rigide, afin de favoriser la tenue de la tuyère. La canne courbe conforme à l'invention permet de résoudre ce problème.The high temperature allows the coal to burn as soon as it leaves the injection pipe. It is therefore important to make the outlet of the injection rod penetrate further into the nozzle, compared to the conventional installation of a rigid rod, in order to promote the holding of the nozzle. The curved rod according to the invention solves this problem.

La canne courbe doit pouvoir elle-aussi résister aux températures élevées recontrées lors de l'utilisation d'une torche à plasma. C'est pourquoi on prévoit un refroidissement de la canne, par exemple par l'une des trois dispositions suivantes.The curved rod must also be able to withstand the high temperatures encountered when using a plasma torch. This is why a rod is provided for cooling, for example by one of the following three arrangements.

Selon une première version, on réalise autour du conduit central de la canne véhiculant le mélange d'air et de charbon, une chemise double annulaire de circulation formée d'eau. Etant donné le peu de place dont on dispose, il s'agit d'un refroidissement par lame d'eau (d'environ 2 mm d'épaisseur): on utilise avantageusement à cet effet la même eau ultra-pure, désionisée et déminéralisée, exigée pour le refroidissement de la torche à plasma.According to a first version, a double annular circulation jacket formed of water is produced around the central duct of the rod carrying the mixture of air and coal. Given the limited space available, it is cooling by a water slide (approximately 2 mm thick): the same ultra-pure, deionized and demineralized water is advantageously used for this purpose. , required for cooling the plasma torch.

Selon une seconde version, le conduit central de la canne est entouré d'une chambre annulaire d'injection d'air sous fort débit (par exemple 80 m 3 /h). According to a second version, the central duct of the rod is surrounded by an annular air injection chamber under high flow (for example 80 m 3 / h ) .

Selon une troisième version, le conduit central 16 (cf. fig. 3) est entoure d'une chambre annulaire 17 dans laquelle est injecté un hydrocarbure liquide.According to a third version, the central conduit 16 (cf. fig. 3) is surrounded by an annular chamber 17 into which a liquid hydrocarbon is injected.

Claims (8)

1. Apparatus for injecting pulverulent material, especially coal dust, into a blast furnace, of the type comprising a hot-air nozzle (1) opening into the blast furnace, a twyere (6) locked against the nozzle (1) and coaxial relative to the latter for the supply of hot air, a branch (8) made obliquely on the twyere (6) and directed towards the nozzle (1), and an injection pipe which passes through this branch (8) and the discharge end of which opens into the nozzle (1), characterized in that the injection pipe (16, 17) is shaped substantially in the form of an arc of a circle, the convexity of which faces the axis (9) of the twyere (6) and of the nozzle (1) and in that the said pipe is movable in a rotational motion having the centre of curvature of the said arc of a circle as its axis, so that the discharge orifice of the pipe can be positioned axially at multiple locations, whilst at the same time remaining near the axis of the said nozzle.
2. Apparatus according to claim 1, characterized in that the radius of curvature of the injection pipe (16, 17) is at least equal to a hundred times the inside diameter of the pipe (16, 17).
3. Apparatus according to either one of claims 1 or 2, characterized in that it possesses means for cooling the said pipe (16, 17).
4. Apparatus according to claim 3, characterized in that the pipe can be cooled by water circulation in a double annular sleeve which surrounds the central conduit of the said pipe.
5. Apparatus according to claim 3, characterized in that the pipe can be cooled by means of an annular chamber which surrounds the central conduit of the said pipe and into which air is injected at a high rate.
6. Apparatus according to claim 3, characterized in that the pipe (16,17) can be cooled by means of an annular chamber (17) which surrounds the central conduit of the said pipe and into which a liquid hydrocarbon can be injected.
7. Apparatus according to any one of claims 1 to 6, characterized in that it possesses means for cooling the branch (8) of the twyere (6).
8. Apparatus according to any one of claims 1 to 7, characterized in that it possesses a plasma torch (13) upstream of the twyere (6).
EP86440021A 1985-04-15 1986-03-18 Apparatus for injecting pulverised material, especially coal dust into a blast furnace Expired EP0199662B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86440021T ATE45593T1 (en) 1985-04-15 1986-03-18 DEVICE FOR INJECTING GRINDED SOLID MATERIAL, ESPECIALLY DUSTED COAL, INTO A BLAST FURNACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8505635A FR2580296B1 (en) 1985-04-15 1985-04-15 DEVICE FOR INJECTING POWDERY MATERIAL, ESPECIALLY COAL, INTO A BLAST FURNACE
FR8505635 1985-04-15

Publications (2)

Publication Number Publication Date
EP0199662A1 EP0199662A1 (en) 1986-10-29
EP0199662B1 true EP0199662B1 (en) 1989-08-16

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EP86440021A Expired EP0199662B1 (en) 1985-04-15 1986-03-18 Apparatus for injecting pulverised material, especially coal dust into a blast furnace

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US (1) US4700930A (en)
EP (1) EP0199662B1 (en)
JP (1) JPH0245757Y2 (en)
CN (1) CN1003863B (en)
AT (1) ATE45593T1 (en)
BR (1) BR8601681A (en)
CA (1) CA1278680C (en)
DE (1) DE3665076D1 (en)
ES (1) ES8703527A1 (en)
FR (1) FR2580296B1 (en)
SU (1) SU1400512A3 (en)
ZA (1) ZA862764B (en)

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DE4136274A1 (en) * 1991-11-04 1993-05-06 Kortec Ag, Zug, Ch METHOD AND DEVICE FOR PROTECTING A BLOWING DEVICE ARRANGED IN A HOT WIND LINE OF A BLAST FURNACE
US5227117A (en) * 1992-05-29 1993-07-13 Usx Corporation Apparatus for blast furnace fuel injection
DE69322002T2 (en) * 1992-07-01 1999-04-01 Wurth Paul Sa Device for blowing coal dust into a blast furnace
CA2073707C (en) * 1992-07-13 1998-04-21 Raymond Lemay Pneumatic injection of powder or granule through submerged tuyeres
JP5125819B2 (en) * 2008-07-02 2013-01-23 Ｊｆｅスチール株式会社 Vertical melting furnace and hot metal manufacturing method
LU91691B1 (en) * 2010-05-26 2011-11-28 Wurth Paul Sa Tuyere stock arrangement of a blast furnace
CN101864503A (en) * 2010-06-22 2010-10-20 新兴河北工程技术有限公司 Water-cooled straight blast pipe

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FR577454A (en) * 1922-12-18 1924-09-05 Cie Auxiliaire D Electricite E Pulverized coal burners improvements
FR586015A (en) * 1923-11-23 1925-03-13 Ile Des Brevets Joullie Soc Ci Blast furnace fuel injection device and other metallurgical devices
US3166621A (en) * 1961-03-16 1965-01-19 Colorado Fuel & Iron Corp Burner tuyere arrangement for a blast furnace
GB951043A (en) * 1962-01-12 1964-03-04 British Petroleum Co Improvements relating to the injection of fluid fuels into blast furnaces
DE1433317A1 (en) * 1962-06-23 1968-11-07 Salzgitter Huettenwerk Ag Device for introducing liquid, gaseous or dust-like fuels into the frame of a shaft furnace, primarily a blast furnace
FR1559679A (en) * 1967-12-08 1969-03-14
DE2912441C2 (en) * 1979-03-29 1982-09-23 ARBED S.A., 2930 Luxembourg Process for the continuous injection of fine-grained brown coal into the frame of a blast furnace
US4278367A (en) * 1979-07-05 1981-07-14 Cyclonaire Corporation Feeder apparatus for pneumatic conveying lines
FR2501833B1 (en) * 1981-03-10 1985-05-31 Stein Industrie DEVICE FOR INTRODUCING AND COMBUSTING A SOLID FUEL SPRAYED INTO A PRESSURE ENCLOSURE
US4490171A (en) * 1982-03-31 1984-12-25 Kobe Steel, Limited Method and apparatus for injecting pulverized fuel into a blast furnace

Also Published As

Publication number Publication date
CA1278680C (en) 1991-01-08
CN86102628A (en) 1986-11-19
FR2580296B1 (en) 1987-07-10
US4700930A (en) 1987-10-20
FR2580296A1 (en) 1986-10-17
JPS6236390U (en) 1987-03-04
EP0199662A1 (en) 1986-10-29
BR8601681A (en) 1986-12-16
CN1003863B (en) 1989-04-12
JPH0245757Y2 (en) 1990-12-04
ES8703527A1 (en) 1987-02-16
ATE45593T1 (en) 1989-09-15
DE3665076D1 (en) 1989-09-21
SU1400512A3 (en) 1988-05-30
ES553955A0 (en) 1987-02-16
ZA862764B (en) 1986-12-30

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