EP0088253B1 - Installation for charging a shaft furnace - Google Patents

Installation for charging a shaft furnace Download PDF

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Publication number
EP0088253B1
EP0088253B1 EP83101361A EP83101361A EP0088253B1 EP 0088253 B1 EP0088253 B1 EP 0088253B1 EP 83101361 A EP83101361 A EP 83101361A EP 83101361 A EP83101361 A EP 83101361A EP 0088253 B1 EP0088253 B1 EP 0088253B1
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EP
European Patent Office
Prior art keywords
fact
accordance
enclosure
bell
storage enclosure
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
Application number
EP83101361A
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German (de)
French (fr)
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EP0088253A1 (en
Inventor
Pierre Mailliet
Léon Ulveling
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Paul Wurth SA
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Paul Wurth SA
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Priority to AT83101361T priority Critical patent/ATE17521T1/en
Publication of EP0088253A1 publication Critical patent/EP0088253A1/en
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Publication of EP0088253B1 publication Critical patent/EP0088253B1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging

Definitions

  • the present invention relates to a feed installation of a shaft furnace comprising a holding hopper, a storage enclosure and a vertical feed channel opening onto a rotary or oscillating distribution chute mounted in the head of the furnace.
  • a metering device generally of the type described in US-A-4074835 and provided in the passage oblique connecting the bottom of this enclosure to the vertical supply channel above the chute.
  • the object of the present invention is to provide a new installation for supplying a shaft furnace with an axial arrangement of the storage enclosure, as well as a new metering member allowing this arrangement, that is to say say able to adjust the flow of a vertically flowing current.
  • the invention proposes a supply installation of the kind described in the preamble, which is essentially characterized in that the storage enclosure, the lower part of which is funnel-shaped, is mounted symmetrically around the central axis of the vertical feed channel and disposed directly above it, and in that there is provided a metering and sealing member, of substantially circular section, mounted symmetrically with respect to said central axis at the intersection of the bottom of the storage enclosure with the vertical channel and connected to drive means to be moved vertically between a closed position, in which said member is applied against the bottom of said enclosure, designed as a seat for this member, and an open position in which said member is more or less lifted from its seat in order to define a more or less large annular flow opening, delimited by the outer contour of said member and the lower and inner edge of the bottom of the enclosure.
  • the storage enclosure is preferably designed in the form of an airlock intended to be alternately pressurized and ventilated.
  • the metering member preferably comprises a frustoconical tip directed downwards, the vertical variation of the section of which contributes, during the vertical movement of said member, to a gradual variation of the annular opening.
  • said member is pear-shaped, with an enlarged upper part and a frustoconical point facing downwards, the intermediate part of which between the point and the upper part is designed as a shoulder intended to cooperate with said seat with a view to closing.
  • the metering member is integral with a control rod penetrating axially through the holding hopper and the storage enclosure and actuated externally using a suitable motor.
  • the metering member consists of an upper bell, the lower edge of which is used for closing and adjusting the flow and a lower bell, the edge of which serves for carrying out the sealing between the oven and the enclosure.
  • the upper bell has a hollow axial bushing traversed by the control rod of the lower bell and it rests on a shoulder of the latter by means of which it is raised and lowered.
  • This design allows not only a centralization of the fall of the loading material, but also a total elimination of the oblique passage, hitherto necessary between the storage enclosure (s) and the vertical supply channel.
  • the removal of this oblique section allows a reduction in investment costs and repair costs and allows a reduction in the height of fall of the loading material.
  • FIGS 1 and 2 schematically show the upper part of a shaft furnace 20 in which is suspended a rotary or oscillating chute 22 to ensure the distribution of the loading material discharged into the furnace.
  • This chute 22 is actuated by a suitable mechanism, in the embodiment shown, in a housing designated by 24 and intended to communicate to the chute 22-! Desired movement.
  • a vertical central channel 26 guides the material to be put into the chute 22.
  • the lower closure member 30 also serves, as will be explained in more detail with reference to the following figures, to regulate the flow of the loading material of the airlock 28 in the channel 26.
  • the airlock 28 is mounted around the central axis 0 of the oven, as is its flow pipe 33 and the closing member 30.
  • the material to be put in falls, this fact, directly from the airlock 28 and this, symmetrically with respect to the axis 0 on the trough 22.
  • the flow of material from the airlock 28 is therefore always in the same way and the problems of asymmetry of distribution consequently of an oblique and offset flow of the loading material, no longer exist.
  • the metering that is to say the control of the position of the closing member 30 to regulate the flow, is carried out according to the loading needs and according to the content in the airlock 28.
  • the weighing is carried out by means of several, preferably three load cells, not shown, on which the airlock rests, the load cells being, in turn, carried by fixed uprights forming part of the frame or superstructure of the oven.
  • the airlock 28 is a waiting hopper 34 intended to be filled, for example, by means of skips 36, while the airlock 28 is emptied.
  • the closing and retaining member 32 provided at the bottom of this hopper 34 makes it possible to establish communication between the latter and the airlock 28.
  • the section of the member 32 is preferably as large as possible.
  • Figures 1 and 2 are distinguished by the arrangement and function of the upper closure member.
  • This member is, in both embodiments, bell-shaped and serves both to establish the seal and the retention of the material in the hopper 34.
  • the member 32 evolves in the airlock 28, while in the embodiment of FIG. 2, the member 42 evolves inside the hopper 34.
  • the closed position is shown in solid lines and the open position in dashed lines.
  • the closing member 32 also performs a function of distributing the loading material in the airlock 28, which results in a loading profile in the shape of an "M" in this airlock .
  • the member 42 is raised for its opening. Since this opening must be made against the action of the weight of the material in the hopper 34, the handling of the member 42 consumes more energy than that of the member 32. In the embodiment of the figure 2, the material falls centrally in the airlock 28 with a natural discharge cone around the axis 0.
  • This closure member 30 will now be described in more detail with reference to FIGS. 3 to 5.
  • This closure member is pear-shaped and has an enlarged upper part 44 whose cross section is wider than that of the tubing. flow 33 of the airlock 28 and a conical or frustoconical lower point 46 which extends into the channel 26 in the closed position of the member 30.
  • the re-entrant edge 48 forming the transition between the part 44 and the point 46 serves as support and closure and cooperates, for this purpose, with a section 50 of the wall of the airlock 28 or of the flow pipe 33.
  • the section 50 preferably forms the transition between the airlock 28 and its flow pipe 33 and has an intermediate inclination between that of the wall of the airlock 28 and that of the wall of the pipe 33 (see more particularly FIGS. 4 and 5) . In this way the section 50 which is in fact the seat of the closure member 30 for sealing is protected from the current of the loading material sliding along the oblique wall of the airlock 28 and does not undergo friction and intense wear of the load material.
  • FIG. 4 illustrates an intermediate opening position.
  • the particular frustoconical shape of the tip 46 allows a fine and progressive metering between the closed position according to FIG. 3 and the maximum flow allowed in the position according to FIG. 5.
  • the fall of the material takes place. produced by the center of the channel 26, along the axis 0, so that the impact of the loading material on the chute 22 is always the same, regardless of the position thereof and the flow rate of the flow.
  • FIGS. 6 and 8 show a second embodiment of a lower closure member which is characterized by a separation of the sealing functions, on the one hand, and the closing and metering functions, on the other hand.
  • This member 60 comprises an upper bell 62, the beveled edge of which rests, in the closed position (FIGS. 6 and 7) on a seat 64 forming part of the wall of the airlock 28 of which it constitutes the flow opening and a lower element.
  • 66 in the form of a bell or mushroom independent of the upper bell 62.
  • This element 66 consists of a sort of plate 66a, the edge of which also cooperates with the seat 64 for the purpose of sealing and a conical tip. or frustoconical 66b having the same shapes and functions as the tip 46 of the first embodiment.
  • the element 66 is integral with an axial control rod 68, actuated from the outside, for example, by means of a hydraulic cylinder.
  • the bell 62 comprises a hollow socket 70 coaxially surrounding the lower part of the control rod 68.
  • FIGS. 6, 7 and 8 The opening and closing of the bell 62 are carried out under the action of the vertical displacement of the element 66 and the operation is clear from FIGS. 6, 7 and 8.
  • the plate 66a is closed in a sealed manner , while the bell 62 also rests on the seat 64 and retains the loading material.
  • the edge of the plate 66a which cooperates with the seat 64 to achieve the seal, is permanently protected from contact with the loading material. Indeed, during the movement between the two positions illustrated in Figures 7 and 8, the plate 66a is always protected by the bell 62, while during the movement between the positions illustrated in Figures 6 and 7, or vice versa, the bell 62 rests on its seat 64 and prevents flow. It is therefore possible to provide on the edge of the plate 66a, a seal 72 made of soft material.
  • the portion 64a of the seat 64 which is intended to cooperate with the seal 72, is also inclined more than the rest of the seat 64 so as to be protected from the material of loading when it slides into channel 26.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Blast Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)

Abstract

A feeding mechanism for a shaft furnace is presented wherein the feeding mechanism is mounted axially on the furnace and employs a vertically adjustable frustoconical dosing element for vertical flow of charging material to a distributing spout.

Description

La présente invention concerne une installation d'alimentation d'un four à cuve comprenant une trémie d'attente, une enceinte de stockage et un canal d'alimentation vertical débouchant sur une goulotte de distribution rotative ou oscillante montée dans la tête du four.The present invention relates to a feed installation of a shaft furnace comprising a holding hopper, a storage enclosure and a vertical feed channel opening onto a rotary or oscillating distribution chute mounted in the head of the furnace.

Jusqu'à présent, le réglage du débit de la matière à enfourner s'écoulant de l'enceinte de stockage vers la goulotte était assuré par un organe doseur, généralement du type décrit dans le brevet US-A-4074835 et prévu dans le passage oblique reliant le fond de cette enceinte au canal d'alimentation vertical au-dessus de la goulotte.Until now, the flow rate of the material to be charged flowing from the storage enclosure to the chute has been controlled by a metering device, generally of the type described in US-A-4074835 and provided in the passage oblique connecting the bottom of this enclosure to the vertical supply channel above the chute.

Ce passage oblique est à l'origine d'un problème de répartition de la matière enfournée, qui est exposé en détail dans le brevet LU-A 82 840. On a essayé de résoudre ce problème de diverses façons, notamment en prévoyant des palettes de guidage qui font l'objet du brevet luxembourgeois précité, ou une sorte debouchon tubulaire, tel que proposé dans le brevet US-A-4040530. Tous ces systèmes ont pour but commun de corriger la trajectoire d'écoulement et de chute de la matière à enfourner pour que celle-ci tombe verticalement et symétriquement sur la goulotte. Tous ces systèmes de rectification de la trajectoire de chute n'ont évidemment pas le même résultat que celui envisageable lorsque l'enceinte de stockage, et son orifice d'écoulement, se trouvent sur l'axe vertical et permettent une chute verticale et centrale de la matière à enfourner sur la goulotte.This oblique passage is at the origin of a problem of distribution of the stuffed material, which is explained in detail in patent LU-A 82 840. We have tried to solve this problem in various ways, in particular by providing pallets of guide which are the subject of the aforementioned Luxembourg patent, or a sort of tubular plug, as proposed in patent US-A-4040530. All of these systems have the common goal of correcting the flow and fall trajectory of the material to be placed in the oven so that it falls vertically and symmetrically onto the chute. All these systems for rectifying the fall trajectory obviously do not have the same result as that which can be envisaged when the storage enclosure, and its flow orifice, are on the vertical axis and allow a vertical and central fall of the material to put in the chute.

Malheureusement, jusqu'à présent, il n'était pas possible de placer l'enceinte de stockage dans l'axe du four, et ceci pour deux raisons essentielles et évidentes. La première raison est que la majorité des installations de chargement à goulotte comporte deux enceintes de stockage juxtaposées opérant en alternance. Or, il n'est pas possible de disposer deux enceintes juxtaposées, toutes les deux dans l'axe du four. La deuxième raison est due au fait que les organes de dosage utilisés à l'heure actuelle ne peuvent opérer que par pénétration dans un courant s'écoulant suivant une direction oblique. Par conséquent, même dans l'hypothèse d'une seule enceinte de stockage, comme par exemple proposé dans la demande de brevet FR-A-2443653 il est nécessaire de désaxer l'enceinte de stockage pour disposer de la section inclinée nécessaire au fonctionnement de l'organe doseur.Unfortunately, until now, it was not possible to place the storage enclosure in the axis of the oven, and this for two essential and obvious reasons. The first reason is that the majority of chute loading facilities have two juxtaposed storage enclosures operating alternately. However, it is not possible to have two juxtaposed enclosures, both in the axis of the oven. The second reason is due to the fact that the metering devices currently used can only operate by penetrating a current flowing in an oblique direction. Consequently, even in the hypothesis of a single storage enclosure, as for example proposed in patent application FR-A-2443653, it is necessary to offset the storage enclosure in order to have the inclined section necessary for the operation of the dosing organ.

Le but de la présente invention est de prévoir une nouvelle installation d'alimentation d'un four à cuve avec une disposition axiale de l'enceinte de stockage, ainsi qu'un nouvel organe de dosage permettant cette disposition, c'est-à-dire pouvant régler le débit d'un courant s'écoulant verticalement.The object of the present invention is to provide a new installation for supplying a shaft furnace with an axial arrangement of the storage enclosure, as well as a new metering member allowing this arrangement, that is to say say able to adjust the flow of a vertically flowing current.

Pour atteindre cet objectif, l'invention propose une installation d'alimentation du genre décrit dans le préambule, qui est essentiellement caractérisé en ce que l'enceinte de stockage, dont la partie inférieure est en forme d'entonnoir, est montée symétriquement autour de l'axe central du canal vertical d'alimentation et disposée directement au-dessus de celui-ci, et en ce qu'il est prévu un organe de dosage et d'étanchéité, de section sensiblement circulaire, monté symétriquement par rapport audit axe central au niveau de l'intersection du fond de l'enceinte de stockage avec le canal vertical et relié à des moyens d'entraînement pour être déplacé verticalement entre une position de fermeture, dans laquelle ledit organe est appliqué contre le fond de ladite enceinte, conçu comme siège pour cet organe, et une position d'ouverture dans laquelle ledit organe est plus ou moins soulevé de son siège afin de définir une ouverture annulaire d'écoulement plus ou moins grande, délimitée par le contour extérieur dudit organe et le bord inférieur et intérieur du fond de l'enceinte.To achieve this objective, the invention proposes a supply installation of the kind described in the preamble, which is essentially characterized in that the storage enclosure, the lower part of which is funnel-shaped, is mounted symmetrically around the central axis of the vertical feed channel and disposed directly above it, and in that there is provided a metering and sealing member, of substantially circular section, mounted symmetrically with respect to said central axis at the intersection of the bottom of the storage enclosure with the vertical channel and connected to drive means to be moved vertically between a closed position, in which said member is applied against the bottom of said enclosure, designed as a seat for this member, and an open position in which said member is more or less lifted from its seat in order to define a more or less large annular flow opening, delimited by the outer contour of said member and the lower and inner edge of the bottom of the enclosure.

L'enceinte de stockage est de préférence conçue sous forme de sas destiné à être alternativement pressurisé et aéré.The storage enclosure is preferably designed in the form of an airlock intended to be alternately pressurized and ventilated.

L'organe de dosage comporte, de préférence, une pointe tronconique dirigée vers le bas, dont la variation verticale de la section contribue, lors du mouvement vertical dudit organe, à une variation progressive de l'ouverture annulaire.The metering member preferably comprises a frustoconical tip directed downwards, the vertical variation of the section of which contributes, during the vertical movement of said member, to a gradual variation of the annular opening.

Dans un premier mode de réalisation, ledit organe est en forme de poire, avec une partie supérieure élargie et une pointe tronconique tournée vers le bas et dont la partie intermédiaire entre la pointe et la partie supérieure est conçue comme épaulement destiné à coopérer avec ledit siège en vue de la fermeture.In a first embodiment, said member is pear-shaped, with an enlarged upper part and a frustoconical point facing downwards, the intermediate part of which between the point and the upper part is designed as a shoulder intended to cooperate with said seat with a view to closing.

L'organe de dosage est solidaire d'une tige de commande pénétrant axialement à travers la trémie d'attente et l'enceinte de stockage et actionné à l'extérieur à l'aide d'un moteur approprié.The metering member is integral with a control rod penetrating axially through the holding hopper and the storage enclosure and actuated externally using a suitable motor.

Selon un deuxième mode de réalisation, l'organe de dosage est constitué d'une cloche supérieure, dont le bord inférieur sert à la fermeture et au réglage de l'écoulement et une cloche inférieure, dont le bord sert à la réalisation de l'étanchéité entre le four et l'enceinte.According to a second embodiment, the metering member consists of an upper bell, the lower edge of which is used for closing and adjusting the flow and a lower bell, the edge of which serves for carrying out the sealing between the oven and the enclosure.

La cloche supérieure comporte une douille axiale creuse traversée par la tige de commande de la cloche inférieure et elle repose sur un épaulement de celle-ci par l'intermédiaire de laquelle elle est soulevée et abaissée.The upper bell has a hollow axial bushing traversed by the control rod of the lower bell and it rests on a shoulder of the latter by means of which it is raised and lowered.

Cette conception permet non seulement une centralisation de la chute de la matière de chargement, mais également.une suppression totale du passage oblique, jusqu'à présent nécessaire entre la ou les enceintes de stockage et le canal vertical d'alimentation. La suppression de cette section oblique permet une diminution des frais d'investissement et des frais de réparation et permet une réduction de la hauteur de chute de la matière de chargement.This design allows not only a centralization of the fall of the loading material, but also a total elimination of the oblique passage, hitherto necessary between the storage enclosure (s) and the vertical supply channel. The removal of this oblique section allows a reduction in investment costs and repair costs and allows a reduction in the height of fall of the loading material.

D'autres particularités et caractéristiques de quelques modes de réalisation ressortiront de la description détaillée ci-dessous, à titre d'illustration, en référence aux dessins annexés, dans lesquels:

  • La Figure 1 représente schématiquement une coupe verticale d'un premier mode de réalisation d'une installation selon l'invention;
  • La Figure 2 montre une variante du mode de réalisation de la Figure 1;
  • Les Figures 3, 4 et 5 montrent schématiquement trois positions différentes de l'organe de dosage et
  • Les Figures 6, 7 et 8 montrent schématiquement un deuxième mode de réalisation d'un organe de dosage illustré dans trois positions différentes.
Other particularities and characteristics of some embodiments will emerge from the detailed description below, by way of illustration, with reference to the accompanying drawings, in which:
  • Figure 1 schematically represents a vertical section of a first embodiment of an installation according to the invention;
  • Figure 2 shows a variant of the embodiment of Figure 1;
  • Figures 3, 4 and 5 schematically show three different positions of the metering member and
  • Figures 6, 7 and 8 schematically show a second embodiment of a metering member illustrated in three different positions.

Les figures 1 et 2 montrent schématiquement la partie supérieure d'un four à cuve 20 dans laquelle est suspendue une goulotte rotative ou oscillante 22 pour assurer la distribution de la matière de chargement déversée dans le four. Cette goulotte 22 est actionnée par un mécanisme approprié, dans le mode de la réalisation représenté, dans un boîtier désigné par 24 et destiné à communiquer à la goulotte 22-!e mouvement souhaité. Un canal central vertical 26 assure le guidage de la matière à enfourner vers la goulotte 22.Figures 1 and 2 schematically show the upper part of a shaft furnace 20 in which is suspended a rotary or oscillating chute 22 to ensure the distribution of the loading material discharged into the furnace. This chute 22 is actuated by a suitable mechanism, in the embodiment shown, in a housing designated by 24 and intended to communicate to the chute 22-! Desired movement. A vertical central channel 26 guides the material to be put into the chute 22.

Une enceinte 28, conçue sous forme de sas et pourvue, à cet effet, d'un organe de fermeture inférieur 30, et d'un organe de fermeture supérieur 32, est montée au-dessus du four 20. L'organe de fermeture inférieur 30 sert également, comme il sera expliqué plus en détail en référence aux figures suivantes, à régler l'écoulement de la matière de chargement du sas 28 dans le canal 26.An enclosure 28, designed in the form of an airlock and provided, for this purpose, with a lower closure member 30, and with an upper closure member 32, is mounted above the oven 20. The lower closure member 30 also serves, as will be explained in more detail with reference to the following figures, to regulate the flow of the loading material of the airlock 28 in the channel 26.

Selon l'une des particularités de l'invention, le sas 28 est monté autour de l'axe central 0 du four, de même que sa tubulure d'écoulement 33 et l'organe de fermeture 30. La matière à enfourner tombe, de ce fait, directement du sas 28 et ce, symétriquement par rapport à l'axe 0 sur la goulotte 22. L'écoulement de la matière du sas 28 se fait par conséquent toujours de la même manière et les problèmes de dissymétrie de répartition par suite d'un écoulement oblique et désaxé de la matière de chargement, n'existent plus.According to one of the features of the invention, the airlock 28 is mounted around the central axis 0 of the oven, as is its flow pipe 33 and the closing member 30. The material to be put in falls, this fact, directly from the airlock 28 and this, symmetrically with respect to the axis 0 on the trough 22. The flow of material from the airlock 28 is therefore always in the same way and the problems of asymmetry of distribution consequently of an oblique and offset flow of the loading material, no longer exist.

Le dosage, c'est-à-dire le contrôle de la position de l'organe de fermeture 30 pour régler l'écoulement, est effectué en fonction des besoins de chargement et en fonction du contenu dans le sas 28. La pesée est effectuée au moyen de plusieurs, de préférence trois pesons, non montrés, sur lesquels repose le sas, les pesons étant, à leur tour, portés par des montants fixes faisant partie de la charpente ou superstructure du four.The metering, that is to say the control of the position of the closing member 30 to regulate the flow, is carried out according to the loading needs and according to the content in the airlock 28. The weighing is carried out by means of several, preferably three load cells, not shown, on which the airlock rests, the load cells being, in turn, carried by fixed uprights forming part of the frame or superstructure of the oven.

Au-dessus du sas 28 se trouve une trémie d'attente 34 destinée à être remplie, par exemple, au moyen de skips 36, pendant que le sas 28 est vidé. L'organe de fermeture et de retenue 32 prévu au fond de cette trémie 34 permet d'établir la communication entre celle-ci et le sas 28. Pour assurer un transfert aussi rapide que possible de la matière de chargement de la trémie d'attente 34 vers le sas 28, la section de l'organe 32 est, de préférence, aussi grande que possible.Above the airlock 28 is a waiting hopper 34 intended to be filled, for example, by means of skips 36, while the airlock 28 is emptied. The closing and retaining member 32 provided at the bottom of this hopper 34 makes it possible to establish communication between the latter and the airlock 28. To ensure that the loading material from the holding hopper is transferred as quickly as possible 34 towards the airlock 28, the section of the member 32 is preferably as large as possible.

Les différentes phases constituant un cycle de chargement, ainsi que l'enchaînement de ces différentes phases sont expliqués en détail dans la demande de brevet FR-A-2443653 décrivant également une installation de chargement avec un seul sas, désaxé par rapport à l'axe central et surmonté d'une trémie d'attente.The different phases constituting a loading cycle, as well as the sequence of these different phases are explained in detail in patent application FR-A-2443653 also describing a loading installation with a single airlock, offset from the axis central and surmounted by a waiting hopper.

Les deux variantes des figures 1 et 2 se distinguent par la disposition et la fonction de l'organe de fermeture supérieur. Cet organe est, dans les deux modes de réalisation, en forme de cloche et sert à la fois à établir l'étanchéité et la retenue de la matière dans la trémie 34.The two variants of Figures 1 and 2 are distinguished by the arrangement and function of the upper closure member. This member is, in both embodiments, bell-shaped and serves both to establish the seal and the retention of the material in the hopper 34.

Toutefois, dans le mode de réalisation selon la figure 1, l'organe 32 évolue dans le sas 28, alors que dans le mode de réalisation de la figure 2, l'organe 42 évolue à l'intérieur de la trémie 34. Sur les deux figures, on a représenté la position fermée en traits pleins et la position ouverte en traits mixtes.However, in the embodiment according to FIG. 1, the member 32 evolves in the airlock 28, while in the embodiment of FIG. 2, the member 42 evolves inside the hopper 34. On the two figures, the closed position is shown in solid lines and the open position in dashed lines.

Dans le mode de réalisation de la figure 1, l'organe de fermeture 32 exerce également une fonction de répartition de la matière de chargement dans le sas 28, ce qui se traduit par un profil de chargement en forme de "M" dans ce sas.In the embodiment of FIG. 1, the closing member 32 also performs a function of distributing the loading material in the airlock 28, which results in a loading profile in the shape of an "M" in this airlock .

Dans le mode de réalisation de la figure 2, l'organe 42 est soulevé en vue de son ouverture. Etant donné que cette ouverture doit se réaliser contre l'action du poids de la matière dans la trémie 34, le maniement de l'organe 42 consomme plus d'énergie que celui de l'organe 32. Dans le mode de réalisation de la figure 2, la matière tombe centralement dans le sas 28 avec un cône de déversement naturel autour de l'axe 0.In the embodiment of Figure 2, the member 42 is raised for its opening. Since this opening must be made against the action of the weight of the material in the hopper 34, the handling of the member 42 consumes more energy than that of the member 32. In the embodiment of the figure 2, the material falls centrally in the airlock 28 with a natural discharge cone around the axis 0.

L'organe de fermeture inférieur 30 sera maintenant décrit plus en détail en référence aux figures 3 à 5. Cet organe de fermeture est en forme de poire et comporte une partie supérieure élargie 44 dont la section est plus large que celle de la tubulure d'écoulement 33 du sas 28 et d'une pointé conique ou tronconique inférieure 46 qui s'étend jusque dans le canal 26 en position fermée de l'organe 30.The lower closure member 30 will now be described in more detail with reference to FIGS. 3 to 5. This closure member is pear-shaped and has an enlarged upper part 44 whose cross section is wider than that of the tubing. flow 33 of the airlock 28 and a conical or frustoconical lower point 46 which extends into the channel 26 in the closed position of the member 30.

Le bord rentrant 48 formant la transition entre la partie 44 et la pointe 46 sert d'appui et de fermeture et coopère, à cet effet, avec une section 50 de la paroi du sas 28 ou de la tubulure d'écoulement 33. La section 50 forme, de préférence, la transition entre le sas 28 et sa tubulure d'écoulement 33 et possède une inclinaison intermédiaire entre celle de la paroi du sas 28 et celle de la paroi de la tubulure 33 (voir plus particulièrement figures 4 et 5). De cette manière la section 50 qui est en fait le siège de l'organe de fermeture 30 pour réaliser l'étanchéité est à l'abri du courant de la matière de chargemen glissant le long de la paroi oblique du sas 28 et ne subit pas de frottement et d'usure intense de la matière dechargement.The re-entrant edge 48 forming the transition between the part 44 and the point 46 serves as support and closure and cooperates, for this purpose, with a section 50 of the wall of the airlock 28 or of the flow pipe 33. The section 50 preferably forms the transition between the airlock 28 and its flow pipe 33 and has an intermediate inclination between that of the wall of the airlock 28 and that of the wall of the pipe 33 (see more particularly FIGS. 4 and 5) . In this way the section 50 which is in fact the seat of the closure member 30 for sealing is protected from the current of the loading material sliding along the oblique wall of the airlock 28 and does not undergo friction and intense wear of the load material.

A l'aide d'une tige de commande 52 traversant axialement le sas 28, l'organe de fermeture supérieur 32 ou 42 et la trémie d'attente 34 et reliant un dispositif d'entraînement approprié de l'extérieur du four à l'organe de fermeture 30, celu ci peut être soulevé de son siège 50 pour établir une communication entre le sas 28 et le canal 26 et permettre l'écoulement de la matière de chargement du sas vers la goulotte 22.Using a control rod 52 axially passing through the airlock 28, the upper closing member 32 or 42 and the waiting hopper 34 and connecting an appropriate drive device from the outside of the oven to the closing member 30, this can be lifted from its seat 50 to establish a communication between the airlock 28 and the channel 26 and allow the flow of the loading material from the airlock to the chute 22.

Dans la position selon la figure 5, l'organe de fermeture 30 est complètement soulevé et permet un débit d'écoulement maximal du sas 28 dans le canal 26. La figure 4 illustre une position d'ouverture intermédiaire. La forme tronconique particulière de la pointe 46 permet un dosage fin et progressif entre la position de fermeture selon la figure 3 et le débit maximal permis dans la position selon la figure 5. Dans toutes les positions d'ouverture, la chute de la matière se produit par le centre du canal 26, le long de l'axe 0, de sorte que l'impact de la matière de chargement sur la goulotte 22 est toujours le même, peu importe la position de celle-ci et le débit de l'écoulement.In the position according to FIG. 5, the closing member 30 is completely raised and allows a maximum flow rate of the airlock 28 in the channel 26. FIG. 4 illustrates an intermediate opening position. The particular frustoconical shape of the tip 46 allows a fine and progressive metering between the closed position according to FIG. 3 and the maximum flow allowed in the position according to FIG. 5. In all the open positions, the fall of the material takes place. produced by the center of the channel 26, along the axis 0, so that the impact of the loading material on the chute 22 is always the same, regardless of the position thereof and the flow rate of the flow.

Les figures 6 et 8 montrent un deuxième mode de réalisation d'un organe de fermeture inférieur qui se caractérise par une séparation des fonctions d'étanchéité, d'une part, et des fonctions de fermeture et de dosage, d'autre part. Cet organe 60 comporte une cloche supérieure 62, dont le bord biseauté repose, en position de fermeture (figures 6 et 7) sur un siège 64 faisant partie de la paroi du sas 28 dont il constitue l'ouverture d'écoulement et un élément inférieur 66 en forme de cloche ou champignon independant de la cloche supérieure 62. Cet élément 66 est constitué d'une sorte de plateau 66a dont le bord coopère également avec le siège 64 en vue de la réalisation de l'étanchéité et d'une pointe conique ou tronconique 66b ayant les mêmes formes et fonctions que la pointe 46 du premier mode de réalisation.Figures 6 and 8 show a second embodiment of a lower closure member which is characterized by a separation of the sealing functions, on the one hand, and the closing and metering functions, on the other hand. This member 60 comprises an upper bell 62, the beveled edge of which rests, in the closed position (FIGS. 6 and 7) on a seat 64 forming part of the wall of the airlock 28 of which it constitutes the flow opening and a lower element. 66 in the form of a bell or mushroom independent of the upper bell 62. This element 66 consists of a sort of plate 66a, the edge of which also cooperates with the seat 64 for the purpose of sealing and a conical tip. or frustoconical 66b having the same shapes and functions as the tip 46 of the first embodiment.

L'élément 66 est solidaire d'une tige de commande axiale 68, actionnée depuis l'extérieur, par exemple, au moyen d'un vérin hydraulique. La cloche 62 comporte une douille creuse 70 entourant coaxialement la partie inférieure de la tige de commande 68.The element 66 is integral with an axial control rod 68, actuated from the outside, for example, by means of a hydraulic cylinder. The bell 62 comprises a hollow socket 70 coaxially surrounding the lower part of the control rod 68.

L'ouverture et la fermeture de la cloche 62 sont réalisées sous l'action du déplacement vertical de l'élément 66 et le fonctionnement ressort clairement des figures 6, 7 et 8. Dans la figure 6, le plateau 66a est fermé de façon étanche, tandis que la cloche 62 repose également sur le siège 64 et retient la matière de chargement.The opening and closing of the bell 62 are carried out under the action of the vertical displacement of the element 66 and the operation is clear from FIGS. 6, 7 and 8. In FIG. 6, the plate 66a is closed in a sealed manner , while the bell 62 also rests on the seat 64 and retains the loading material.

Alors que dans la position selon la figure 7, la cloche 62 occupe toujours la même position fermée, l'élément 66 a été légèrement remonté à l'intérieur de la cloche 62 et l'étanchéité entre le sas 28 et le canal 26 n'est plus assuré.While in the position according to FIG. 7, the bell 62 still occupies the same closed position, the element 66 has been slightly reassembled inside the bell 62 and the seal between the airlock 28 and the channel 26 does not is more assured.

Si, à partir de la position selon la figure 7, la tige de commande 68 est relevée davantage, le plateau 66a entraîne la douille 70 et soulève la cloche 62 du siège 64 pour ouvrir l'ouverture d'écoulement et laisser glisser la matière de chargement dans le canal 26 (Figure 8). Le dosage est réalisé par la variation de l'amplitude du déplacement de la tige de commande 68, qui permet de modifier la largeur de l'ouverture annulaire d'écoulement entre la paroi du sas 28, d'une part, et le bord de la cloche 62 et la pointe tronconique 66b, d'autre part. La fermeture comporte évidemment les mêmes phases que décrit ci-dessus, mais dans l'ordre inverse.If, from the position according to FIG. 7, the control rod 68 is raised further, the plate 66a drives the bush 70 and lifts the bell 62 from the seat 64 to open the flow opening and let the material slide loading in channel 26 (Figure 8). The metering is carried out by varying the amplitude of the displacement of the control rod 68, which makes it possible to modify the width of the annular flow opening between the wall of the airlock 28, on the one hand, and the edge of the bell 62 and the frustoconical tip 66b, on the other hand. Closure obviously has the same phases as described above, but in reverse order.

Comme le montrent les figures 6 à 8, le bord du plateau 66a, qui coopère avec le siège 64 pour réaliser l'étanchéité, est protégé en permanence du contact avec la matière de chargement. En effet, lors du mouvement entre les deux positions illustrées par les figures 7 et 8, le plateau 66a est toujours protégé par la cloche 62, tandis que lors du mouvement entre les positions illustrées par les figures 6 et 7, ou vice versa, la cloche 62 repose sur son siège 64 et empêche l'écoulement. Il est donc possible de prévoir sur le bord du plateau 66a, un joint d'étanchéité 72 réalisé en matériau mou.As shown in Figures 6 to 8, the edge of the plate 66a, which cooperates with the seat 64 to achieve the seal, is permanently protected from contact with the loading material. Indeed, during the movement between the two positions illustrated in Figures 7 and 8, the plate 66a is always protected by the bell 62, while during the movement between the positions illustrated in Figures 6 and 7, or vice versa, the bell 62 rests on its seat 64 and prevents flow. It is therefore possible to provide on the edge of the plate 66a, a seal 72 made of soft material.

Comme dans le mode de réalisation précédent, la partie 64a du siège 64, qui est destinée à coopérer avec le joint d'étanchéité 72, est également incliné davantage que le reste du siège 64 afin d'être à l'abri de la matière de chargement lorsque celle-ci glisse dans le canal 26.As in the previous embodiment, the portion 64a of the seat 64, which is intended to cooperate with the seal 72, is also inclined more than the rest of the seat 64 so as to be protected from the material of loading when it slides into channel 26.

Pour augmenter la résistance mécanique des organes de fermeture 30 et 60, il est bien entendu possible de prévoir des conduites à l'intérieur de ces organes en vue de la circulation d'un fluide de refroidissement qui peut être amené à travers les tiges de commande 52 ou 68. Il est également possible de prévoir des résistances électriques pour réchauffer les surfaces d'étanchéité afin d'éviter un encrassement de celles-ci par dépôt d'humidité.To increase the mechanical resistance of the closure members 30 and 60, it is of course possible to provide pipes inside these members for the circulation of a cooling fluid which can be brought through the control rods. 52 or 68. It is also possible to provide electrical resistances to heat the sealing surfaces in order to avoid fouling of these by moisture deposition.

Claims (10)

1.- A feed installation for a shaft furnace, comprising a stand-by hopper (34), a storage enclosure (28) and a vertical feed channel (26) leading to a rotary or oscillating distributing spout (22) mounted in the head of the furnace (20) characterized by the fact that the storage enclosure (28), of which the lower part takes the form of a funnel, is mounted symmetrically arount the central axis (0) of the vertical feed channel (26) and positioned directly above this latter, and by the fact that a tight dosing device (30, 60) is provided, of a substantially circular cross section, mounted symmetrically in respect of the said central axis (0) on a level with the intersection of the base of the storage enclosure (28) with the vertical channel (26), and connected to a driving means enabling it to be moved vertically between a closing position, in which the said device (30, 60) is caused to rest against the base of the said enclosure (28), designed as a seating for the said device (30, 60) and an opening position in which the said device (30, 60) is raised to greater or smaller distance form its seating (50, 64) in order to define an annular discharge orifice of greater or smaller size, delimited by the external contour of the said device (30,60) and the lower inner edge of the base of the enclosure (28).
2.- A device in accordance with Claim 1, characterized by the fact that the storage enclosure (28) is constructed as a chamber designed to be pressurized and ventilated alternately.
3.- A device in accordance with either of Claims 1 or 2, characterized by the fact that the dosing device (30, 60) comprises a conical or frusto-conical point (46, 66b) directed downwards the variation of its cross-section in the vertical direction resulting during the vertical movement of the said device (30,60) in a gradual variation of the annular discharge orifice.
4.- A device in accordance with Claim 3, characterized by the fact that the said device (30) is pearshaped, with an upper portion (44) of greater width and with a conical or frusto-conical point (46) directed downwards its intermediate part between the point (46) and the upper portion (44) being designed as a shoulder (48) of which the purpose is to interact with the said seating (50) for closure purposes.
5.- A device in accordance with Claim 4, characterized by the fact that the dosing device (30) is integral with a control bar (52) which penetrates the standby hopper (34) and the storage enclosure (28) in an axial direction and which is actuated by means of a suitable motor.
6.- A device in accordance with either of Claims 1 to 3, characterized by the fact that the dosing device (60) consists of an upper bell (62) of which the lower edge serves for the closure and for the regulation of the rate of delivery of material and a lower bell (66) of which the edge serves to ensure hermeticity between the furnace (20) and the enclosure (28).
7.- A device in accordance with Claim 8, characterized by the fact that the lower bell (66) is integral with a control bar (68) penetrating the stand-by hopper (34) and the storage enclosure (28) in an axial direction and actuated from the outside by means of a suitable motor.
8.- A device in accordance with Claim 7, characterized by the fact that the upper bell (62) comprises a hollow axial sleeve (70) traversed by the control bar (68) of the lower bell (66) and wherein during its operation it rests on a shoulder of the said bell, by which it is raised and lowered.
9.- A device in accordance with Claim 8, characterized by a tight joint (72) of a soft material provided on the edge of the lower bell (66).
10.- A device in accordance with either of Claims 1 to 9, characterized by the fact that the seating (50, 64) of the device (30, 60) comprises a section of which the angle of inclination is greater than that of the funnel-shaped lower part of the enclosure (28).
EP83101361A 1982-03-10 1983-02-12 Installation for charging a shaft furnace Expired EP0088253B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101361T ATE17521T1 (en) 1982-03-10 1983-02-12 DEVICE FOR LOADING A SHAFT FURNACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84000 1982-03-10
LU84000A LU84000A1 (en) 1982-03-10 1982-03-10 SUPPLY SYSTEM FOR A TANK OVEN

Publications (2)

Publication Number Publication Date
EP0088253A1 EP0088253A1 (en) 1983-09-14
EP0088253B1 true EP0088253B1 (en) 1986-01-15

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ID=19729832

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EP83101361A Expired EP0088253B1 (en) 1982-03-10 1983-02-12 Installation for charging a shaft furnace

Country Status (9)

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US (1) US4512702A (en)
EP (1) EP0088253B1 (en)
JP (2) JPS58167705A (en)
AT (1) ATE17521T1 (en)
CA (1) CA1209800A (en)
CS (1) CS235037B2 (en)
DE (1) DE3361813D1 (en)
IN (1) IN159019B (en)
LU (1) LU84000A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585432B2 (en) * 1986-03-04 1989-06-15 Paul Wurth S.A. Installation for charging a shaft furnace
FR2638825A1 (en) * 1988-11-09 1990-05-11 Wurth Paul Sa LOADING SYSTEM FOR A TANK OVEN
EP0613955A1 (en) * 1993-03-04 1994-09-07 Paul Wurth S.A. Loading device comprising a flow-control member
TR26694A (en) * 1991-05-25 1995-05-15 Bayer Ag SUBSTITUTED 4-HETARIL-PIRAZOLINES
DE4404315C2 (en) * 1993-03-04 2002-11-28 Wurth Paul Sa Feeding device for a pressurized shaft furnace

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JPS61276908A (en) * 1985-05-30 1986-12-06 Ishikawajima Harima Heavy Ind Co Ltd Raw material distributing and adjusting device in top charger for blast furnace
LU88494A1 (en) * 1994-06-08 1996-02-01 Wurth Paul Sa Rotary chute loading device for a shaft furnace
SE507247C2 (en) * 1996-03-29 1998-04-27 Ssab Oxeloesund Ab Dispenser for a blast furnace
GB2405632B (en) * 2003-09-03 2006-02-22 Ivan Semenenko Improvements in or relating to closure assemblies for stores of flowable material
US7228956B2 (en) * 2005-01-10 2007-06-12 Benetech, Inc. Bulk material precision transfer chute apparatus
RU2279484C1 (en) 2005-02-07 2006-07-10 Общество С Ограниченной Ответственностью "Исследовательско-Технологический Центр "Аусферр" Ingredient feeding apparatus for direct alloying of steel
DE102005007519B3 (en) * 2005-02-17 2006-10-19 Hermanns Silo Gmbh shut-off valve
US8393281B1 (en) * 2008-02-27 2013-03-12 University Of Mississippi Particle feeder
LU91525B1 (en) 2009-02-11 2010-08-12 Wurth Paul Sa Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace
LU91526B1 (en) 2009-02-11 2010-08-12 Wurth Paul Sa Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace
WO2014084804A1 (en) * 2012-11-30 2014-06-05 Tarasov Vladimir Petrovich Blast furnace charging device
CN106044297A (en) * 2016-08-02 2016-10-26 扬中灵平风机制造有限公司 Unpowered grain distributor
GB201709995D0 (en) * 2017-06-22 2017-08-09 Matcon Ltd Material discharge apparatus
CN112029945A (en) * 2020-09-03 2020-12-04 赫章县黎明矿业有限公司 Novel shaft furnace for roasting siderite with bituminous coal

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585432B2 (en) * 1986-03-04 1989-06-15 Paul Wurth S.A. Installation for charging a shaft furnace
FR2638825A1 (en) * 1988-11-09 1990-05-11 Wurth Paul Sa LOADING SYSTEM FOR A TANK OVEN
TR26694A (en) * 1991-05-25 1995-05-15 Bayer Ag SUBSTITUTED 4-HETARIL-PIRAZOLINES
EP0613955A1 (en) * 1993-03-04 1994-09-07 Paul Wurth S.A. Loading device comprising a flow-control member
US5411242A (en) * 1993-03-04 1995-05-02 Paul Wurth S.A. Charging device with member for regulating the flow rate
TR27694A (en) * 1993-03-04 1995-06-19 Wurth Paul Sa Filling device with component that regulates flow rate.
DE4404315C2 (en) * 1993-03-04 2002-11-28 Wurth Paul Sa Feeding device for a pressurized shaft furnace

Also Published As

Publication number Publication date
US4512702A (en) 1985-04-23
DE3361813D1 (en) 1986-02-27
JPH0516201Y2 (en) 1993-04-28
JPH04106345U (en) 1992-09-14
LU84000A1 (en) 1983-11-17
IN159019B (en) 1987-03-07
ATE17521T1 (en) 1986-02-15
JPS58167705A (en) 1983-10-04
CS235037B2 (en) 1985-04-16
CA1209800A (en) 1986-08-19
EP0088253A1 (en) 1983-09-14

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