EP0501173A1 - Process and apparatus for treating steel-making slags - Google Patents

Process and apparatus for treating steel-making slags Download PDF

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Publication number
EP0501173A1
EP0501173A1 EP92101735A EP92101735A EP0501173A1 EP 0501173 A1 EP0501173 A1 EP 0501173A1 EP 92101735 A EP92101735 A EP 92101735A EP 92101735 A EP92101735 A EP 92101735A EP 0501173 A1 EP0501173 A1 EP 0501173A1
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EP
European Patent Office
Prior art keywords
tank
slag
arm
plug
rod
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.)
Ceased
Application number
EP92101735A
Other languages
German (de)
French (fr)
Inventor
Hubert Stomp
Marc Solvi
Albert Feitler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0501173A1 publication Critical patent/EP0501173A1/en
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/10—Slag pots; Slag cars
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag

Definitions

  • the present invention relates to a process for treating steel slag contained, in the liquid state, in a tank, as well as an installation for the treatment of these slag.
  • Steel slag which comes from the processing of steel in a ladle or in a converter, unlike blast furnace slag, which after granulation and cooling is used in the construction sector, is used as fertilizer because of its content high in particular in phosphates from dephosphorization of steel. While blast furnace slag can be processed continuously as it is produced, steel slag is produced intermittently in large quantities and cannot, with current means, be cooled and granulated like blast furnace slag.
  • the steel slag which floats on the molten steel bath in a ladle or in a converter, is emptied into a tank at the end of the steel treatment operation. They are then transported with the tank to a landfill or a storage site where the slag is cooled as a whole. After cooling in the open air, they are crushed until a fine powder is obtained which can be used in this form as a fertilizer, more generally known as Thomas slag. To facilitate the use of these slag the powder can also be transformed into granules.
  • the aim of the present invention is to propose a new process and installation for treating steel slag which allows wet granulation of the slag without risk of explosion.
  • the method proposed by the invention consists in causing the flow of slag through a tap hole at the bottom of the tank, in determining the flow rate of slag in flow by a permanent control of the weight of the tank, direct the slag stream flowing from the tank to one or more jets of granulation water, the flow rate of which can be adjusted according to the slag flow rate.
  • the method proposed by the invention allows better control of the flow.
  • the flow rate of the flow is much better defined by the section of the tap hole, compared to the random flow rate of the discharge through the upper edge of the pocket.
  • the permanent weighing of the bag allows monitoring of the slag flow by observing the reduction in weight, and, in Consequently, it is possible to adapt and regulate the quantity of granulation water as a function of the slag flow rate. This control of the flow can be further improved by the installation of observation cameras.
  • the invention also provides an installation for the implementation of this method, which is characterized by a taphole provided in the bottom of the wall of the tank, by means of weighing the tank, by a closure device. of the taphole, by means of operating said device between a closed position and an open position away from said opening, as well as by a device for releasing the taphole that can be engaged through it to initiate the flow of slag.
  • the device for closing and releasing the tap hole is carried by an arm pivotally mounted on the wall of the tank and subjected to the action of a spring ensuring the positioning of the arm both in the garage position and in working position.
  • the closure device is constituted by a plug and the device for releasing the tap hole by a rod, the two being arranged in a "V" shape on a pivoting shaft in a support fixed on said pivoting arm. Maneuvering means make it possible to pivot this arm so as to place either the plug or the rod in the operative angular position in the axis of the tap hole when said arm is in the working position.
  • the operative angular positions of the plug and the rod are preferably defined by two stops and by a compressed spring between the support and a lever secured to said shaft so that the plug and the rod are held in their active position. under the action of the spring and resting on their respective stop.
  • the positions of the stops are preferably adjustable with a view to adjusting the operative angular positions of the plug and of the rod.
  • the operating means are preferably mounted on a mobile carriage sliding along a frame next to the tank and comprise a first operating arm pivoting under the action of a first jack and provided with a hydraulic clamp to be coupled to the pivoting arm on the tank and a second maneuvering arm pivoting under the action of a second cylinder to actuate the closure plug and the release rod of the tap hole.
  • the shaft of the plug and of the rod may be integral with a crank offset from the shaft and engaging in a fork at the end of the second operating arm.
  • the weighing means of the tank can simply be constituted by one or more weight sensors on which the tank is placed before the opening of the tap hole.
  • the proposed method does not require a special tank and can be implemented with the tanks currently used. It suffices to make an opening in the bottom of the wall of the tank and to fix thereon, above the taphole, the device for closing and releasing the taphole.
  • the installation proposed for implementing the method according to the invention essentially consists of a control device according to FIGS. 1 to 5 and a device for operating the control unit according to FIGS. 6 and 7.
  • a control device 16 which will be described in detail with simultaneous reference to the figures is mounted on the outside wall of the wall 14 above the tap hole 10 1 to 5.
  • the device 16 essentially comprises a device 18 for closing and releasing the taphole 10 carried by a support 22 fixed to the lower end of an arm 24 which is mounted, by its central part, between two legs 26 welded or bolted to the wall 14 of the tank 12.
  • a coil spring 28 is compressed between the upper part of the arm 24 and a support 30 integral with the wall 14 of the tank. The location of the connection between the spring 28 and the arm 24 is chosen so that in the position of FIG. 1 the spring 28 acts on the pivoting arm 24 clockwise in order to keep the device in the tap hole 10 closed position.
  • the pivoting arm 24 comprises a central branch 32 at the end of which is a transverse bar 34 capable of undergoing the action of the operating means which will be described later with reference to FIGS. 6 and 7. These operating means serve to rotate arm 24 between the working position or closed position of Figure 1 and a garage position according to Figure 2 away from the tap hole 10 and vice versa.
  • the spring 28 is positioned so as to stabilize both the working position and the garage position.
  • the pivoting of the arm 24 to move the device from the position of FIG. 1 to that of FIG. 2 is carried out first against the action of the spring 28 until in an intermediate position corresponding to the neutral point in which the the axis of the spring coincides with a virtual line passing through the pivot axis of the arm 24 and the fixing center of the spring 28 on the support 30. From this intermediate position the final phase of pivoting towards the position of the Figure 2 is produced under the action of the spring 28. This is, moreover, sufficiently powerful to maintain the device in the position of Figure 2.
  • the pivoting of the arm 24 from the position of Figure 2 towards that of FIG. 1 is carried out in two phases, one against the action of the spring 28 and, from neutral, under the action of the spring 28.
  • This device consists essentially of a plug 36 to close the taphole 10 according to Figure 1 and a rod 38 intended to be engaged through the tap hole 10 to initiate the flow of slag.
  • the plug 36 and the rod 38 which may be of refractory steel, are integral with one another and oriented mutually in a "V" shaped arrangement.
  • the plug 36 and the rod 38 are supported by two pins or a shaft 40 rotatably housed in two parallel sheets 42, 44 forming the support 22 which is fixed to the pivoting arm 24.
  • One end of the rotary shaft 40 is integral, beyond one of the sheets 42 or 44, with a sleeve 46 offset from the axis of the shaft 40 and forming a crank with this one.
  • the shaft 40 can be actuated by maneuvering means to pivot about its axis and position either the plug 36 in the operative position according to Figure 3 or the rod 38 in the operative position according to Figure 4 or vice vice versa.
  • the closing of the taphole 10 is ensured by mutual contact between a frustoconical section 36a of the plug 36 and a plate 48 having a complementary closing surface and screwed onto a gasket 49 defining the hole casting 10. This allows the replacement of the plate 48 in the event of wear and avoids having to redo the lining 50.
  • the stable positioning of the plug 36 in the operative position according to FIG. 3 and that of the rod 38 according to FIG. 4 is preferably produced by a spring 50 whose action is comparable to the spring 28 in FIGS. 1 and 2.
  • This spring 50 is compressed around a positioning rod 52 articulated on the one hand on a support 54 integral with the support 22 and a double lever arm 56 integral with the plug 36 and the rod 38.
  • the amplitude of pivoting of the plug 36 and of the rod 38 under the action of the crank 46 is limited by two stops 58 and 60 fixed on one of the sheets 42, 44 of the support 22 and cooperating with the double lever arm 56.
  • the stops 58 and 60 are of preferably adjustable by means of adjustment screws in order to be able to adjust or modify the angular orientation of the plug 36 and of the rod 38 if necessary.
  • the spring 50 keeps the lever arm 56 in abutment on the stop 58 to ensure a stable orientation of the plug 36
  • the spring 50 keeps the lever arm in abutment on the stop 60 to ensure stable orientation of the rod 38. Pivoting from the position according to FIG. 3 to that of FIG.
  • crank 46 under the action of the crank 46 can therefore be carried out in two phases, first against the action of the spring 56 until the dead center of the spring 50 in alignment with the axis of rotation of the shaft 40 and then under the action of spring 50 until it stops against one of the two stops 58, 60.
  • FIGs 6 and 7 schematically illustrate the operating means for actuating the pivoting arm 24 and the crank 46.
  • a carriage 60 is suspended from a frame 62 so as to be able to slide along the latter perpendicular to the plane of the figures under the action of a suitable motor not shown.
  • a first operating arm 64 is articulated by one of its ends on the carriage 60 so as to be able to pivot in a vertical plane around a horizontal axis under the action of a hydraulic cylinder 66 provided between the carriage 60 and the arm 64.
  • the end of the operating arm 64 is designed in the form of a clamp 68 produced using a jaw 70 which can pivot relative to the axis of the arm 64 under the action of a jack 72 mounted between the arm 64 and this jaw 70.
  • the clamp 68 is shown in the closed position.
  • the clamp 68 is opened by pivoting the movable jaw 70 counterclockwise under the effect of the retraction of the jack 72.
  • a second operating arm 74 partially masked in FIG. 6 by the jack 72 but clearly visible in FIG. 7 is also pivotally mounted on the carriage 60 so as to be able to tilt in a vertical plane under the action of a jack 76 provided between the arm 74 and the carriage 60.
  • the free end of this maneuvering arm 74 is designed in the form of a fork 78.
  • the closure plug 36 is, of course, in the position of FIG. 1 and is held there in a sealed manner under the effect of the pressure exerted by the spring 28.
  • the clamp 68 (see fig. 6) is opened by the jack 72 and the carriage 60 is moved perpendicular to the plane of the view, the two operating arms 64 and 74 being in the position according to the Figure 7. This movement is intended to achieve the engagement of the bar 34 of the pivoting arm 24 in the open clamp 68 which is immediately closed by the cylinder 72 of the correct positions.
  • the next phase consists in actuating the jack 66 to raise the operating arm 64 from the position according to FIG. 6 to that of FIG. 7, which causes the rotation of the pivoting arm 24 around its pivot axis, as far as the position illustrated in FIG. 2, this first against and then under the action of the spring 28. This movement also causes the engagement of the crank 46 in the hollow of the fork 78 of the operating arm 74.
  • the operating arm 64 is then again lowered into the position of FIG. 6 under the action of the jack 66 to actuate the pivoting arm 24 and cause the rod 38 to penetrate through the tap hole 10 to release the latter and initiate the flow of liquid slag.
  • the arm 64 is immediately raised, as soon as the flow begins to place the device in the position of FIG. 2 away from the slag stream.
  • Liquid slag can therefore flow freely in a granulation device which can, for example, be of the type described in European patent 0082279 and in which the slag is disintegrated and solidified under the action of powerful jets of water.
  • the quantity of granulation water can be adjusted, as proposed in this patent, as a function of the slag flow rate, this flow rate being known by the reduction in weight of the tank.
  • the granulation device it is also possible to influence the granulometry by the power of the granulation water jets.
  • the process proposed by the present invention therefore makes it possible to spare the operation of crushing and grinding slag and avoids the release of large quantities of dust.
  • the vapor released by the liquid granulation is easily recoverable by carrying out the process in a closed enclosure with extractor hoods.
  • the operating arm 74 When the tank 12 is emptied of its content, the operating arm 74 is actuated by its jack 76 to tumble the device 22 clockwise so that the closure plug 36 is in its operative position according to FIG. 3. Then the operating arm 64 is actuated in order to close the taphole 10 according to FIG. 1. The operating device must then be released with the carriage 60 to release the tank 12 and remove it from the dumping site slag.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

A new process and a new plant for the treatment of steelworks slags in a vessel which permits a wet granulation of the slag without any risk of explosions. The slags are made to flow through a casting hole at the bottom of the vessel and the flow rate of the flowing slags is determined by a continuous control of the weight of the vessel. One or more jets of granulating water are directed onto the stream of slags flowing out of the vessel, their flow rate being controlled as a function of the flow rate of slags. The plant comprises a vessel (12) containing molten slags. This vessel (12) is provided with means for weighing, a casting hole (10), and device for shutting off the casting hole (10), means for manoeuvring the said device between a working position and a garage position at a distance from the casting hole (10) and a device for releasing the casting hole (10) which can be engaged through the latter to initiate the flow of slags. <IMAGE>

Description

La présente invention concerne un procédé de traitement de scories d'aciérie contenues, à l'état liquide, dans une cuve, ainsi qu'une installation pour le traitement de ces scories.The present invention relates to a process for treating steel slag contained, in the liquid state, in a tank, as well as an installation for the treatment of these slag.

Les scories d'aciérie, qui proviennent du traitement de l'acier en poche ou en convertisseur, contrairement au scories de haut fourneau, qui après granulation et refroidissement sont utilisées dans le domaine de la construction, sont utilisées comme engrais à cause de leur teneur élevée notamment en phosphates provenant de la déphosphoration de l'acier. Alors que les scories de haut fourneau peuvent être traitées de façon continue au fur et à mesure de leur production, les scories d'aciérie sont produites par intermittence en grandes quantités et ne peuvent pas, avec les moyens actuels, être refroidies et granulées comme les scories de haut fourneau.Steel slag, which comes from the processing of steel in a ladle or in a converter, unlike blast furnace slag, which after granulation and cooling is used in the construction sector, is used as fertilizer because of its content high in particular in phosphates from dephosphorization of steel. While blast furnace slag can be processed continuously as it is produced, steel slag is produced intermittently in large quantities and cannot, with current means, be cooled and granulated like blast furnace slag.

Les scories d'aciérie, qui surnagent le bain d'acier en fusion dans une poche ou dans un convertisseur sont vidées dans une cuve à la fin de l'opération de traitement de l'acier. Elles sont ensuite transportées avec la cuve sur une décharge ou un site de stockage où les scories sont refroidies en bloc. Après refroidissement à l'air libre elles sont concassées jusqu'à l'obtention d'une fine poudre qui peut être utilisée sous cette forme comme engrais, plus généralement connu comme scories Thomas. Pour faciliter l'utilisation de ces scories la poudre peut être également transformée en granules.The steel slag, which floats on the molten steel bath in a ladle or in a converter, is emptied into a tank at the end of the steel treatment operation. They are then transported with the tank to a landfill or a storage site where the slag is cooled as a whole. After cooling in the open air, they are crushed until a fine powder is obtained which can be used in this form as a fertilizer, more generally known as Thomas slag. To facilitate the use of these slag the powder can also be transformed into granules.

Ce traitement des scories refroidies, notamment en concassage, développe énormément de poussière qui est très difficile à maîtriser. Les directives de plus en plus strictes concernant le respect de l'environnement ont incité les spécialistes à effectuer des essais de refroidissement et de granulation des scories à l'eau à l'instar du traitement de scories de haut fourneau. Malheureusement, ces essais ont échoués parce qu'ils se heurtent au fait que les scories d'aciérie sont produites par intermittence et se trouvent obligatoirement stockées dans une cuve ou poche avant son traitement. Ces essais consistaient donc à déverser les scories en fusion par le bord supérieur de la cuve et par inclinaison progressive de celle-ci, sur un dispositif de granulation dans lequel le courant de scories en fusion subit l'action d'eau de granulation. Ces essais n'ont pas eu de suite dans la pratique, car il n'était pas possible d'éviter de violentes explosions dues à l'évaporation instantanée de l'eau et aux modifications rapides de volume et favorisés, en plus, par le déversement irrégulier des scories pouvant, en outre, contenir des blocs de scories ou même d'acier à l'état pâteux ou solide.This treatment of cooled slag, especially in crushing, develops a lot of dust which is very difficult to control. The increasingly strict directives concerning the respect of the environment prompted specialists to carry out cooling and granulation tests of slag with water. like the treatment of blast furnace slag. Unfortunately, these tests have failed because they run up against the fact that the steel slag is produced intermittently and must be stored in a tank or pocket before its treatment. These tests therefore consisted in pouring the molten slag through the upper edge of the tank and by progressive inclination of the latter, onto a granulation device in which the stream of molten slag undergoes the action of granulation water. These tests were not followed up in practice, because it was not possible to avoid violent explosions due to the instantaneous evaporation of water and rapid changes in volume and favored, in addition, by the irregular dumping of slag which may also contain blocks of slag or even steel in a pasty or solid state.

Le but de la présente invention est de proposer un nouveau procédé et installation de traitement de scories d'aciérie qui permet une granulation humide des scories sans risques d'explosions.The aim of the present invention is to propose a new process and installation for treating steel slag which allows wet granulation of the slag without risk of explosion.

Pour atteindre cet objectif, le procédé proposé par l'invention consiste à provoquer l'écoulement des scories par un trou de coulée au fond de la cuve, à déterminer le débit des scories en écoulement par un contrôle permanent du poids de la cuve, à diriger le courant de scories s'écoulant de la cuve sur un ou plusieurs jets d'eau de granulation dont le débit est réglable en fonction du débit de scories.To achieve this objective, the method proposed by the invention consists in causing the flow of slag through a tap hole at the bottom of the tank, in determining the flow rate of slag in flow by a permanent control of the weight of the tank, direct the slag stream flowing from the tank to one or more jets of granulation water, the flow rate of which can be adjusted according to the slag flow rate.

Comparé aux essais décrits ci-dessus, le procédé proposé par l'invention permet une meilleure maîtrise de l'écoulement. D'un côté, le débit de l'écoulement est beaucoup mieux défini par la section du trou de coulée, comparé au débit aléatoire du déversement par le bord supérieur de la poche. D'un autre côté, la pesée permanente de la poche permet une surveillance du débit de scories par l'observation de la diminution du poids, et, en conséquence, permet d'adapter et de régler la quantité d'eau de granulation en fonction du débit de scories. Cette maîtrise de l'écoulement peut encore être améliorée par l'installation de caméras d'observation.Compared to the tests described above, the method proposed by the invention allows better control of the flow. On the one hand, the flow rate of the flow is much better defined by the section of the tap hole, compared to the random flow rate of the discharge through the upper edge of the pocket. On the other hand, the permanent weighing of the bag allows monitoring of the slag flow by observing the reduction in weight, and, in Consequently, it is possible to adapt and regulate the quantity of granulation water as a function of the slag flow rate. This control of the flow can be further improved by the installation of observation cameras.

L'invention propose également une installation pour la mise en oeuvre de ce procédé, qui est caractérisée par un trou de coulée prévu dans le fond de la paroi de la cuve, par des moyens de pesée de la cuve, par un dispositif d'obturation du trou de coulée, par des moyens de manoeuvre dudit dispositif entre une position de fermeture et une position d'ouverture à l'écart de ladite ouverture, ainsi que par un dispositif de libération du trou de coulée engageable à travers celui-ci pour amorcer l'écoulement de scories.The invention also provides an installation for the implementation of this method, which is characterized by a taphole provided in the bottom of the wall of the tank, by means of weighing the tank, by a closure device. of the taphole, by means of operating said device between a closed position and an open position away from said opening, as well as by a device for releasing the taphole that can be engaged through it to initiate the flow of slag.

Le dispositif d'obturation et de libération du trou de coulée est porté par un bras monté de manière pivotante sur la paroi de la cuve et soumis à l'action d'un ressort assurant le positionnement du bras aussi bien en position de garage qu'en position de travail. Le dispositif d'obturation est constitué par un bouchon et le dispositif de libération du trou de coulée par une tige, les deux étant disposés en "V" sur un arbre pivotant dans un support fixé sur ledit bras pivotant. Des moyens de manoeuvre permettent de faire pivoter ce bras de manière à placer, soit le bouchon, soit la tige en position angulaire opérative dans l'axe du trou de coulée lorsque ledit bras se trouve en position de travail.The device for closing and releasing the tap hole is carried by an arm pivotally mounted on the wall of the tank and subjected to the action of a spring ensuring the positioning of the arm both in the garage position and in working position. The closure device is constituted by a plug and the device for releasing the tap hole by a rod, the two being arranged in a "V" shape on a pivoting shaft in a support fixed on said pivoting arm. Maneuvering means make it possible to pivot this arm so as to place either the plug or the rod in the operative angular position in the axis of the tap hole when said arm is in the working position.

Les positions angulaires opératives du bouchon et de la tige sont, de préférence, définies par deux butées d'arrêt et par un ressort comprimé entre le support et un levier solidaire dudit arbre de manière que le bouchon et la tige soient maintenus dans leur position active sous l'action du ressort et en appui sur leur butée respective.The operative angular positions of the plug and the rod are preferably defined by two stops and by a compressed spring between the support and a lever secured to said shaft so that the plug and the rod are held in their active position. under the action of the spring and resting on their respective stop.

Les positions des butées sont, de préférence, réglables en vue de l'ajustement des positions angulaires opératives du bouchon et de la tige.The positions of the stops are preferably adjustable with a view to adjusting the operative angular positions of the plug and of the rod.

Les moyens de manoeuvre sont, de préférence, montés sur un chariot mobile coulissant le long d'une charpente à côté de la cuve et comportent un premier bras de manoeuvre pivotant sous l'action d'un premier vérin et pourvu d'une pince hydraulique pour être accouplé au bras pivotant sur la cuve et un second bras de manoeuvre pivotant sous l'action d'un second vérin pour actionner le bouchon d'obturation et la tige de libération du trou de coulée.The operating means are preferably mounted on a mobile carriage sliding along a frame next to the tank and comprise a first operating arm pivoting under the action of a first jack and provided with a hydraulic clamp to be coupled to the pivoting arm on the tank and a second maneuvering arm pivoting under the action of a second cylinder to actuate the closure plug and the release rod of the tap hole.

L'arbre du bouchon et de la tige peut être solidaire d'une manivelle désaxée par rapport à l'arbre et engageable dans une fourche à l'extrémité du second bras de manoeuvre.The shaft of the plug and of the rod may be integral with a crank offset from the shaft and engaging in a fork at the end of the second operating arm.

Les moyens de pesée de la cuve peuvent simplement être constitués par un ou plusieurs capteurs de poids sur lesquels est placée la cuve avant l'ouverture du trou de coulée.The weighing means of the tank can simply be constituted by one or more weight sensors on which the tank is placed before the opening of the tap hole.

Il est à remarquer que le procédé proposé ne nécessite pas de cuve spéciale et peut être mis en oeuvre avec les cuves utilisées actuellement. Il suffit de pratiquer une ouverture dans le fond de la paroi de la cuve et de fixer sur celle-ci, au-dessus du trou de coulée, le dispositif d'obturation et de libération du trou de coulée.It should be noted that the proposed method does not require a special tank and can be implemented with the tanks currently used. It suffices to make an opening in the bottom of the wall of the tank and to fix thereon, above the taphole, the device for closing and releasing the taphole.

D'autres particularités et caractéristiques ressortiront de la description d'un mode de réalisation avantageux, présenté ci-dessous, à titre d'illustration, en référence aux dessins annexés dans lesquels:

  • La figure 1 montre une partie d'une cuve en coupe verticale avec un dispositif de commande de l'écoulement en position fermée;
  • La figure 2 montre une vue analogue à celle de la figure 1 avec le dispositif de commande de l'écoulement en position ouverte;
  • La figure 3 représente une vue agrandie latérale de la tête du dispositif de commande avec le bouchon d'obturation en position opérative;
  • La figure 4 est une vue analogue à la figure 3 représentant la tige de libération en position opérative;
  • La figure 5 représente une coupe axiale avec les détails du trou de coulée et du bouchon d'obturation et
  • les figures 6 et 7 représentent schématiquement les moyens de manoeuvre en deux positions différentes.
Other particularities and characteristics will emerge from the description of an advantageous embodiment, presented below, by way of illustration, with reference to the appended drawings in which:
  • Figure 1 shows part of a tank in vertical section with a flow control device in the closed position;
  • Figure 2 shows a view similar to that of Figure 1 with the flow control device in the open position;
  • FIG. 3 represents an enlarged side view of the head of the control device with the closure plug in the operative position;
  • Figure 4 is a view similar to Figure 3 showing the release rod in the operative position;
  • FIG. 5 represents an axial section with the details of the taphole and the plug and
  • Figures 6 and 7 schematically show the operating means in two different positions.

L'installation proposée pour la mise en oeuvre du procédé selon l'invention est constituée essentiellement d'un dispositif de commande selon les figures 1 à 5 et d'un dispositif de manoeuvre de l'unité de commande selon les figures 6 et 7.The installation proposed for implementing the method according to the invention essentially consists of a control device according to FIGS. 1 to 5 and a device for operating the control unit according to FIGS. 6 and 7.

Pour la mise en oeuvre du procédé proposé par l'invention en vue de la granulation, par voie humide, de scories d'aciérie on pratique dans la paroi 14 d'une cuve 12 destinée à recevoir les scories d'un convertisseur ou d'une poche de coulée un trou de coulée 10. Pour actionner ce trou de coulée 10 on monte sur la paroi extérieure de la paroi 14 au-dessus du trou de coulée 10 un dispositif de commande 16 qui sera décrit en détail en référence simultanée aux figures 1 à 5.For the implementation of the process proposed by the invention for the granulation, by wet process, of steel slag is practiced in the wall 14 of a tank 12 intended to receive the slag from a converter or a ladle a tap hole 10. To actuate this tap hole 10, a control device 16 which will be described in detail with simultaneous reference to the figures is mounted on the outside wall of the wall 14 above the tap hole 10 1 to 5.

Le dispositif 16 comporte essentiellement un dispositif 18 d'obturation et de libération du trou de coulée 10 porté par un support 22 fixé à l'extrémité inférieure d'un bras 24 qui est monté, par sa partie centrale, entre deux pattes 26 soudées ou boulonnées sur la paroi 14 de la cuve 12. Un ressort à boudin 28 est comprimé entre la partie supérieure du bras 24 et un appui 30 solidaire de la paroi 14 de la cuve. L'emplacement de la liaison entre le ressort 28 et le bras 24 est choisi de manière que dans la position de la figure 1 le ressort 28 agisse sur le bras pivotant 24 dans le sens des aiguilles d'une montre afin de maintenir le dispositif dans la position de fermeture du trou de coulée 10.The device 16 essentially comprises a device 18 for closing and releasing the taphole 10 carried by a support 22 fixed to the lower end of an arm 24 which is mounted, by its central part, between two legs 26 welded or bolted to the wall 14 of the tank 12. A coil spring 28 is compressed between the upper part of the arm 24 and a support 30 integral with the wall 14 of the tank. The location of the connection between the spring 28 and the arm 24 is chosen so that in the position of FIG. 1 the spring 28 acts on the pivoting arm 24 clockwise in order to keep the device in the tap hole 10 closed position.

Le bras pivotant 24 comporte une branche centrale 32 à l'extrémité de laquelle se trouve une barre transversale 34 susceptible de subir l'action des moyens de manoeuvre qui seront décrits plus loin en référence aux figures 6 et 7. Ces moyens de manoeuvre servent à faire pivoter le bras 24 entre la position de travail ou position fermée de la figure 1 et une position de garage selon la figure 2 à l'écart du trou de coulée 10 et vice versa.The pivoting arm 24 comprises a central branch 32 at the end of which is a transverse bar 34 capable of undergoing the action of the operating means which will be described later with reference to FIGS. 6 and 7. These operating means serve to rotate arm 24 between the working position or closed position of Figure 1 and a garage position according to Figure 2 away from the tap hole 10 and vice versa.

Comme le montrent les figures 1 et 2, le ressort 28 est positionné de manière à stabiliser aussi bien la position de travail que la position de garage. En effet, le pivotement du bras 24 pour déplacer le dispositif de la position de la figure 1 vers celle de la figure 2 s'effectue d'abord contre l'action du ressort 28 jusque dans une position intermédiaire correspondant au point mort dans lequel l'axe du ressort est confondu avec une ligne virtuelle passant par l'axe de pivotement du bras 24 et le centre de fixation du ressort 28 sur l'appui 30. A partir de cette position intermédiaire la phase finale de pivotement vers la position de la figure 2 est réalisée sous l'action du ressort 28. Celui-ci est, en outre, suffisamment puissant pour maintenir le dispositif dans la position de la figure 2. De même, le pivotement du bras 24 de la position de la figure 2 vers celle de la figure 1 est effectué en deux phases, l'une contre l'action du ressort 28 et, à partir du point mort, sous l'action du ressort 28.As shown in Figures 1 and 2, the spring 28 is positioned so as to stabilize both the working position and the garage position. In fact, the pivoting of the arm 24 to move the device from the position of FIG. 1 to that of FIG. 2 is carried out first against the action of the spring 28 until in an intermediate position corresponding to the neutral point in which the the axis of the spring coincides with a virtual line passing through the pivot axis of the arm 24 and the fixing center of the spring 28 on the support 30. From this intermediate position the final phase of pivoting towards the position of the Figure 2 is produced under the action of the spring 28. This is, moreover, sufficiently powerful to maintain the device in the position of Figure 2. Similarly, the pivoting of the arm 24 from the position of Figure 2 towards that of FIG. 1 is carried out in two phases, one against the action of the spring 28 and, from neutral, under the action of the spring 28.

On va maintenant décrire plus en détail le dispositif 18 en référence aux figures 3 à 5. Ce dispositif est constitué essentiellement d'un bouchon 36 pour fermer le trou de coulée 10 conformément à la figure 1 et d'une tige 38 destinée à être engagée à travers le trou de coulée 10 pour amorcer l'écoulement des scories. Le bouchon 36 et la tige 38, qui peuvent être en acier réfractaire, sont solidaires l'un de l'autre et orientés mutuellement suivant une disposition en forme de "V". Le bouchon 36 et la tige 38 sont supportés par deux tourillons ou un arbre 40 logé de façon rotative dans deux tôles parallèles 42, 44 formant le support 22 qui est fixé au bras pivotant 24. L'une des extrémités de l'arbre rotatif 40 est solidaire, au-delà de l'une des tôles 42 ou 44, d'un manchon 46 désaxé par rapport à l'axe de l'arbre 40 et formant une manivelle avec celui-ci. Grâce à cette manivelle 46, l'arbre 40 peut être actionné par des moyens de manoeuvre pour pivoter autour de son axe et positionner soit le bouchon 36 en position opérative selon la figure 3 soit la tige 38 en position opérative selon la figure 4 ou vice versa. Comme représenté plus en détail sur la figure 5, la fermeture du trou de coulée 10 est assurée par le contact mutuel entre une section tronconique 36a du bouchon 36 et une plaque 48 présentant une surface de fermeture complémentaire et vissée sur une garniture 49 définissant le trou de coulée 10. Ceci permet le remplacement de la plaque 48 en cas d'usure et évite de devoir refaire la garniture 50. En plus, il est possible de disposer de différents gabarits de plaques 48 ayant des sections de passage différentes pour modifier, si nécessaire, le débit de l'écoulement des scories.We will now describe in more detail the device 18 with reference to Figures 3 to 5. This device consists essentially of a plug 36 to close the taphole 10 according to Figure 1 and a rod 38 intended to be engaged through the tap hole 10 to initiate the flow of slag. The plug 36 and the rod 38, which may be of refractory steel, are integral with one another and oriented mutually in a "V" shaped arrangement. The plug 36 and the rod 38 are supported by two pins or a shaft 40 rotatably housed in two parallel sheets 42, 44 forming the support 22 which is fixed to the pivoting arm 24. One end of the rotary shaft 40 is integral, beyond one of the sheets 42 or 44, with a sleeve 46 offset from the axis of the shaft 40 and forming a crank with this one. With this crank 46, the shaft 40 can be actuated by maneuvering means to pivot about its axis and position either the plug 36 in the operative position according to Figure 3 or the rod 38 in the operative position according to Figure 4 or vice vice versa. As shown in more detail in FIG. 5, the closing of the taphole 10 is ensured by mutual contact between a frustoconical section 36a of the plug 36 and a plate 48 having a complementary closing surface and screwed onto a gasket 49 defining the hole casting 10. This allows the replacement of the plate 48 in the event of wear and avoids having to redo the lining 50. In addition, it is possible to have different template plates 48 having different passage sections to modify, if necessary, the flow of slag flow.

Le positionnement stable du bouchon 36 en position opérative selon la figure 3 et celui de la tige 38 selon la figure 4 est, de préférence, réalisé par un ressort 50 dont l'action est comparable au ressort 28 des figures 1 et 2. Ce ressort 50 est comprimé autour d'une tige de positionnement 52 articulée d'une part sur un appui 54 solidaire du support 22 et un double bras de levier 56 solidaire du bouchon 36 et de la tige 38. L'amplitude de pivotement du bouchon 36 et de la tige 38 sous l'action de la manivelle 46 est limitée par deux butées 58 et 60 fixées sur l'une des tôles 42, 44 du support 22 et coopérant avec le double bras de levier 56. Les butées 58 et 60 sont de préférence ajustables au moyen de vis de réglage pour pouvoir ajuster ou modifier l'orientation angulaire du bouchon 36 et de la tige 38 en cas de besoin. Dans la position de la figure 3, le ressort 50 maintient le bras de levier 56 en appui sur la butée 58 pour assurer une orientation stable du bouchon 36, alors que selon la figure 4 le ressort 50 maintient le bras de levier en appui sur la butée 60 pour assurer une orientation stable de la tige 38. Un pivotement de la position selon la figure 3 vers celle de la figure 4 et vice versa sous l'action de la manivelle 46 peut donc être réalisé en deux phases, d'abord contre l'action du ressort 56 jusqu'au point mort du ressort 50 en alignement sur l'axe de rotation de l'arbre 40 et ensuite sous l'action de ressort 50 jusqu'à l'arrêt contre l'une des deux butées 58, 60.The stable positioning of the plug 36 in the operative position according to FIG. 3 and that of the rod 38 according to FIG. 4 is preferably produced by a spring 50 whose action is comparable to the spring 28 in FIGS. 1 and 2. This spring 50 is compressed around a positioning rod 52 articulated on the one hand on a support 54 integral with the support 22 and a double lever arm 56 integral with the plug 36 and the rod 38. The amplitude of pivoting of the plug 36 and of the rod 38 under the action of the crank 46 is limited by two stops 58 and 60 fixed on one of the sheets 42, 44 of the support 22 and cooperating with the double lever arm 56. The stops 58 and 60 are of preferably adjustable by means of adjustment screws in order to be able to adjust or modify the angular orientation of the plug 36 and of the rod 38 if necessary. In the position of FIG. 3, the spring 50 keeps the lever arm 56 in abutment on the stop 58 to ensure a stable orientation of the plug 36, while according to FIG. 4 the spring 50 keeps the lever arm in abutment on the stop 60 to ensure stable orientation of the rod 38. Pivoting from the position according to FIG. 3 to that of FIG. 4 and vice versa under the action of the crank 46 can therefore be carried out in two phases, first against the action of the spring 56 until the dead center of the spring 50 in alignment with the axis of rotation of the shaft 40 and then under the action of spring 50 until it stops against one of the two stops 58, 60.

Les figures 6 et 7 illustrent schématiquement les moyens de manoeuvre pour actionner le bras pivotant 24 et la manivelle 46. Un chariot 60 est suspendu à une charpente 62 de manière à pouvoir coulisser le long de celle-ci perpendiculairement au plan des figures sous l'action d'un moteur approprié non représenté. Un premier bras de manoeuvre 64 est articulé par l'une de ses extrémités sur le chariot 60 de manière à pouvoir pivoter dans un plan vertical autour d'un axe horizontal sous l'action d'un vérin hydraulique 66 prévu entre le chariot 60 et le bras 64. L'extrémité du bras de manoeuvre 64 est conçue sous forme de pince 68 réalisée à l'aide d'une mâchoire 70 pouvant pivoter par rapport à l'axe du bras 64 sous l'action d'un vérin 72 monté entre le bras 64 et cette mâchoire 70. Sur la figure 6 la pince 68 est représentée en position fermée. L'ouverture de la pince 68 est réalisée par pivotement de la mâchoire mobile 70 dans le sens trigonométrique sous l'effet de la rétraction du vérin 72.Figures 6 and 7 schematically illustrate the operating means for actuating the pivoting arm 24 and the crank 46. A carriage 60 is suspended from a frame 62 so as to be able to slide along the latter perpendicular to the plane of the figures under the action of a suitable motor not shown. A first operating arm 64 is articulated by one of its ends on the carriage 60 so as to be able to pivot in a vertical plane around a horizontal axis under the action of a hydraulic cylinder 66 provided between the carriage 60 and the arm 64. The end of the operating arm 64 is designed in the form of a clamp 68 produced using a jaw 70 which can pivot relative to the axis of the arm 64 under the action of a jack 72 mounted between the arm 64 and this jaw 70. In Figure 6 the clamp 68 is shown in the closed position. The clamp 68 is opened by pivoting the movable jaw 70 counterclockwise under the effect of the retraction of the jack 72.

Un second bras de manoeuvre 74 partiellement masqué sur la figure 6 par le vérin 72 mais bien visible sur la figure 7 est également monté, de manière pivotante, sur le chariot 60 afin de pouvoir basculer dans un plan vertical sous l'action d'un vérin 76 prévu entre le bras 74 et le chariot 60. L'extrémité libre de ce bras de manoeuvre 74 est conçue sous forme de fourche 78.A second operating arm 74 partially masked in FIG. 6 by the jack 72 but clearly visible in FIG. 7 is also pivotally mounted on the carriage 60 so as to be able to tilt in a vertical plane under the action of a jack 76 provided between the arm 74 and the carriage 60. The free end of this maneuvering arm 74 is designed in the form of a fork 78.

On va maintenant décrire le fonctionnement de l'installation pour une opération de vidange d'une cuve 12 remplie de scories en provenance d'une poche métallurgique ou d'un convertisseur. Cette cuve 12 remplie de scories liquides est amenée, par les moyens de transports habituels au site de déversement des scories à côté de l'installation de manoeuvre des figures 6 et 7 en-dessous de laquelle se trouve une station de traitement de scories du genre utilisé pour la granulation des scories de haut fourneau, de préférence une installation selon le brevet US 4,289,519 comprenant une tête de granulation pour solidifier les scories dans des jets d'eau, suivi d'une station de filtration des scories granulées. La cuve 12 y est déposée sur une plate-forme 80 (voir fig. 1) qui est supportée par des pesons ou capteurs de poids susceptibles de fournir, en permanence, des renseignements sur le poids de la cuve et de son contenu.We will now describe the operation of the installation for an operation of emptying a tank 12 filled with slag from a metallurgical ladle or a converter. This tank 12 filled with slag liquids is brought by the usual means of transport to the slag dumping site next to the maneuvering installation of Figures 6 and 7 below which is located a slag treatment station of the kind used for the granulation of slag blast furnace, preferably an installation according to US Pat. No. 4,289,519 comprising a granulation head for solidifying the slag in water jets, followed by a filtration station for the granulated slag. The tank 12 is placed there on a platform 80 (see fig. 1) which is supported by load cells or weight sensors capable of permanently supplying information on the weight of the tank and its contents.

Lors du transport de la cuve le bouchon d'obturation 36 se trouve, bien entendu, dans la position de la figure 1 et y est maintenu de façon étanche sous l'effet de la pression exercée par le ressort 28. Après la pose de la cuve 12 sur la plate-forme 80 la pince 68 (voir fig. 6) est ouverte par le vérin 72 et le chariot 60 est déplacé perpendiculairement au plan de la vue, les deux bras de manoeuvre 64 et 74 étant dans la position selon la figure 7. Ce déplacement est destiné à réaliser l'engagement de la barre 34 du bras pivotant 24 dans la pince ouverte 68 qui est immédiatement refermée par le vérin 72 des positionnements corrects.During transport of the tank, the closure plug 36 is, of course, in the position of FIG. 1 and is held there in a sealed manner under the effect of the pressure exerted by the spring 28. After the installation of the tank 12 on the platform 80 the clamp 68 (see fig. 6) is opened by the jack 72 and the carriage 60 is moved perpendicular to the plane of the view, the two operating arms 64 and 74 being in the position according to the Figure 7. This movement is intended to achieve the engagement of the bar 34 of the pivoting arm 24 in the open clamp 68 which is immediately closed by the cylinder 72 of the correct positions.

La prochaine phase consiste à actionner le vérin 66 pour soulever le bras de manoeuvre 64 de la position selon la figure 6 vers celle de la figure 7, ce qui provoque la rotation du bras pivotant 24 autour de son axe de pivotement, jusque dans la position illustrée sur la figure 2, ceci d'abord contre et ensuite sous l'action du ressort 28. Ce mouvement provoque également l'engagement de la manivelle 46 dans le creux de la fourche 78 du bras de manoeuvre 74.The next phase consists in actuating the jack 66 to raise the operating arm 64 from the position according to FIG. 6 to that of FIG. 7, which causes the rotation of the pivoting arm 24 around its pivot axis, as far as the position illustrated in FIG. 2, this first against and then under the action of the spring 28. This movement also causes the engagement of the crank 46 in the hollow of the fork 78 of the operating arm 74.

Cette manoeuvre dégage le trou de coulée 10 mais ne permet pas nécessairement l'écoulement immédiat des scories étant donné qu'il est probable qu'une couche de scories durcies ou solidifiées se soit formée au niveau du trou de coulée 10 obstruant son passage. Si tel est le cas, il est nécessaire de libérer le trou de coulée 10 de son bouchon d'obstruction à l'aide de la tige 38. A cet effet, le bras de manoeuvre 74 est soulevé à l'aide de son vérin 76 ce qui, par son action sur la manivelle 46 provoque la rotation de l'arbre 40 dans le sens trigonométrique et le pivotement de l'ensemble bouchon 36 - tige 38 de la position de la figure 3 vers la position de la figure 4.This maneuver clears the tap hole 10 but does not necessarily allow the immediate flow of slag since it is likely that a hardened or solidified slag layer has formed at the tap hole 10 obstructing its passage. If this is the case, it is necessary to release the taphole 10 from its obstruction plug using the rod 38. For this purpose, the operating arm 74 is raised using its jack 76 which, by its action on the crank 46 causes the rotation of the shaft 40 in the trigonometric direction and the pivoting of the plug 36 - rod 38 assembly from the position of FIG. 3 to the position of FIG. 4.

Le bras de manoeuvre 64 est ensuite, à nouveau, descendu dans la position de la figure 6 sous l'action du vérin 66 pour actionner le bras pivotant 24 et faire pénétrer la tige 38 à travers le trou de coulée 10 pour libérer celui-ci et amorcer l'écoulement des scories liquides. Le bras 64 est immédiatement relevé, dès l'amorce de l'écoulement pour placer le dispositif dans la position de la figure 2 à l'écart du courant de scories.The operating arm 64 is then again lowered into the position of FIG. 6 under the action of the jack 66 to actuate the pivoting arm 24 and cause the rod 38 to penetrate through the tap hole 10 to release the latter and initiate the flow of liquid slag. The arm 64 is immediately raised, as soon as the flow begins to place the device in the position of FIG. 2 away from the slag stream.

Les scories liquides peuvent dès lors s'écouler librement dans un dispositif de granulation pouvant, par exemple, être du type décrit dans le brevet européen 0082279 et dans lequel les scories sont désintégrées et solidifiées sous l'action de puissants jets d'eau. La quantité d'eau de granulation peut être réglée, comme proposé dans ce brevet, en fonction du débit de scories, ce débit étant connu par la diminution de poids de la cuve. En dehors du contrôle du poids de la cuve, il est également possible d'effectuer une surveillance optique de l'écoulement à l'aide d'une caméra de télévision.Liquid slag can therefore flow freely in a granulation device which can, for example, be of the type described in European patent 0082279 and in which the slag is disintegrated and solidified under the action of powerful jets of water. The quantity of granulation water can be adjusted, as proposed in this patent, as a function of the slag flow rate, this flow rate being known by the reduction in weight of the tank. In addition to monitoring the tank weight, it is also possible to carry out optical flow monitoring using a television camera.

Dans le dispositif de granulation il est également possible d'influencer la granulométrie par la puissance des jets d'eau de granulation.In the granulation device it is also possible to influence the granulometry by the power of the granulation water jets.

Comparé à la pratique actuelle, le procédé proposé par la présente invention permet, par conséquent, d'épargner l'opération de concassage et de broyage des scories et permet d'éviter le dégagement d'importantes quantités de poussière. D'un autre côté, la vapeur dégagée par la granulation liquide est facilement récupérable en effectuant la mise en oeuvre du procédé dans une enceinte fermée avec des hottes d'aspiration. Par la possibilité d'influencer la granulométrie des particules de scories solidifiées il est même possible d'envisager la production directe de granules de scories sous une forme utilisable comme engrais.Compared to current practice, the process proposed by the present invention therefore makes it possible to spare the operation of crushing and grinding slag and avoids the release of large quantities of dust. On the other hand, the vapor released by the liquid granulation is easily recoverable by carrying out the process in a closed enclosure with extractor hoods. By the possibility of influencing the granulometry of the solidified slag particles it is even possible to envisage the direct production of slag granules in a form usable as fertilizer.

Lorsque la cuve 12 est vidée de son contenu, on actionne le bras de manoeuvre 74 par son vérin 76 pour culbuter le dispositif 22 dans le sens des aiguilles d'une montre afin que le bouchon d'obturation 36 se présente dans sa position opérative selon la figure 3. Ensuite on actionne le bras de manoeuvre 64 afin de refermer le trou de coulée 10 selon la figure 1. Le dispositif de manoeuvre doit alors être dégagé avec le chariot 60 pour libérer la cuve 12 et l'enlever du site de déversement des scories.When the tank 12 is emptied of its content, the operating arm 74 is actuated by its jack 76 to tumble the device 22 clockwise so that the closure plug 36 is in its operative position according to FIG. 3. Then the operating arm 64 is actuated in order to close the taphole 10 according to FIG. 1. The operating device must then be released with the carriage 60 to release the tank 12 and remove it from the dumping site slag.

Claims (10)

Procédé de traitement de scories d'aciérie contenues, à l'état liquide, dans une cuve, caractérisé en ce que l'on provoque l'écoulement des scories par un trou de coulée au fond de la cuve, en ce que l'on détermine le débit des scories en écoulement par un contrôle permanent du poids de la cuve, en ce que l'on dirige sur le courant de scories s'écoulant de la cuve un ou plusieurs jets d'eau de granulation dont on règle le débit en fonction du débit de scories.Process for treating steel slag contained in a liquid state in a tank, characterized in that the slag is caused to flow through a tap hole at the bottom of the tank, in that determines the flow of slag in flow by a permanent control of the weight of the tank, in that one directs on the stream of slag flowing from the tank one or more jets of granulation water whose flow rate is regulated depending on the slag flow. Installation pour la mise en oeuvre du procédé selon la revendication 1, comprenant une cuve (12) contenant des scories en fusion, caractérisée par des moyens de pesée de la cuve (12), par un trou de coulée (10) prévu dans le fond de la paroi (14) de la cuve (12) par un dispositif d'obturation du trou de coulée (10), par des moyens de manoeuvre dudit dispositif entre une position de travail et une position de garage à l'écart du trou de coulée (10), ainsi qu'un dispositif de libération du trou de coulée (10) engageable à travers celui-ci pour amorcer l'écoulement de scories.Installation for carrying out the method according to claim 1, comprising a tank (12) containing molten slag, characterized by means for weighing the tank (12), by a tap hole (10) provided in the bottom of the wall (14) of the tank (12) by a device for closing the taphole (10), by means of operating said device between a working position and a garage position away from the pouring (10), as well as a device for releasing the taphole (10) which can be engaged through it to initiate the flow of slag. Installation selon la revendication 2, caractérisée en ce que lesdits dispositifs d'obturation et de libération (18) du trou de coulée (10) sont portés par un bras (24) monté de manière pivotante sur la paroi (14) de la cuve (12), en ce que ledit bras (24) est soumis à l'action d'un ressort (28) assurant le positionnement du bras (24) aussi bien en position de garage qu'en position de travail.Installation according to claim 2, characterized in that said shutter and release devices (18) of the taphole (10) are carried by an arm (24) pivotally mounted on the wall (14) of the tank ( 12), in that said arm (24) is subjected to the action of a spring (28) ensuring the positioning of the arm (24) both in the garage position and in the working position. Installation selon la revendication 3, caractérisée en ce que le dispositif d'obturation est constitué par un bouchon (36) et le dispositif de libération par une tige (38), en ce que le bouchon (36) et la tige (38) sont disposés en "V" sur un arbre (40) pivotant dans un support (22) fixé sur ledit bras (24) et en ce que sont prévus des moyens de manoeuvre pour faire pivoter ledit arbre (40) de manière à placer soit le bouchon (36), soit la tige (38) en position angulaire opérative dans l'axe du trou de coulée (10) lorsque ledit bras (24) se trouve en position de travail.Installation according to claim 3, characterized in that the closure device is constituted by a plug (36) and the release device by a rod (38), in that the plug (36) and the rod (38) are arranged in a "V" on a shaft (40) pivoting in a support (22) fixed on said arm (24) and in that there are operating means for pivoting said shaft (40) so as to place either the plug (36), or the rod (38) in operative angular position in the axis of the taphole (10) when said arm (24) is in the working position. Installation selon la revendication 4, caractérisée par deux butées d'arrêt (58, 60) définissant les positions angulaires opératives du bouchon (36) et de la tige (38) et par un ressort (50) comprimé entre le support (22) et un bras de levier (56) solidaire dudit arbre (40) de manière que le bouchon (36) et la tige (38) soient maintenus dans leur position active sous l'action dudit ressort (50) et en appui sur leur butée respective (58), (60).Installation according to claim 4, characterized by two stops (58, 60) defining the angular operating positions of the plug (36) and the rod (38) and by a spring (50) compressed between the support (22) and a lever arm (56) integral with said shaft (40) so that the plug (36) and the rod (38) are held in their active position under the action of said spring (50) and resting on their respective stop ( 58), (60). Installation selon la revendication 5, caractérisée en ce que les positions des butées (58, 60) sont réglables en vue de l'ajustement des positions angulaires opératives du bouchon (36) et de la tige (38).Installation according to claim 5, characterized in that the positions of the stops (58, 60) are adjustable in order to adjust the operative angular positions of the plug (36) and the rod (38). Installation selon la revendication 2, caractérisée en ce que lesdits moyens de manoeuvre sont montés sur un chariot mobile (60) coulissant le long d'une charpente (62) à côté de la cuve (12) et comportent un premier bras de manoeuvre (64) pivotant sous l'action d'un premier vérin (66) et pourvu d'une pince hydraulique (68) pour être accouplé au bras pivotant (24) sur la cuve (12) et un second bras de manoeuvre (74) pivotant sous l'action d'un second vérin (76) pour actionner le bouchon d'obturation (36) et la tige de libération (38) du trou de coulée (10).Installation according to claim 2, characterized in that said operating means are mounted on a mobile carriage (60) sliding along a frame (62) next to the tank (12) and comprise a first operating arm (64 ) pivoting under the action of a first cylinder (66) and provided with a hydraulic clamp (68) to be coupled to the pivoting arm (24) on the tank (12) and a second operating arm (74) pivoting under the action of a second cylinder (76) to actuate the closure plug (36) and the release rod (38) of the tap hole (10). Installation selon les revendications 4 et 7, caractérisée en ce que l'arbre (40) du bouchon (36) et de la tige (38) est solidaire d'une manivelle (46) désaxée par rapport à l'axe de l'arbre (40) et engageable dans une fourche (78) à l'extrémité du second bras de manoeuvre (74) lorsque le dispositif d'obturation (18) est en position de garage.Installation according to claims 4 and 7, characterized in that the shaft (40) of the plug (36) and of the rod (38) is integral with a crank (46) offset from the axis of the shaft (40) and can be engaged in a fork (78) at the end of the second operating arm (74) when the shutter device (18) is in the garage position. Installation selon la revendication 2, caractérisée en ce que les moyens de pesée sont constitués par des capteurs de poids sur lesquels est placée la cuve avant l'ouverture du trou de coulée.Installation according to claim 2, characterized in that the weighing means are constituted by weight sensors on which the tank is placed before the opening of the tap hole. Scories obtenues par un procédé selon la revendication 1.Slag obtained by a process according to claim 1.
EP92101735A 1991-03-01 1992-02-03 Process and apparatus for treating steel-making slags Ceased EP0501173A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87896A LU87896A1 (en) 1991-03-01 1991-03-01 PROCESS FOR TREATING STEEL DAIRY, INSTALLATION FOR IMPLEMENTING SAME AND SLAGS OBTAINED BY THE PROCESS
LU87896 1991-03-01

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EP0501173A1 true EP0501173A1 (en) 1992-09-02

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EP (1) EP0501173A1 (en)
JP (1) JPH05105934A (en)
CN (1) CN1027820C (en)
AU (1) AU649104B2 (en)
BR (1) BR9200799A (en)
CA (1) CA2062168A1 (en)
LU (1) LU87896A1 (en)
RU (1) RU2025469C1 (en)
TW (1) TW212206B (en)

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US6191761B1 (en) * 1998-11-09 2001-02-20 University Of Washington Method and apparatus for determining optical distance
WO2012040558A2 (en) * 2010-09-23 2012-03-29 Gillespie + Powers, Inc. Furnace tap hole flow control and tapper system and method of using the same
CN102071270B (en) * 2010-12-20 2012-07-18 山西太钢不锈钢股份有限公司 Method for setting total water amount of thermal process of steel slag strip ladle
US11708302B2 (en) 2017-09-28 2023-07-25 Arcelormittal Method of continuous manufacturing of solidified steelmaking slag and associated device
CN109825657A (en) * 2019-04-03 2019-05-31 中冶赛迪工程技术股份有限公司 Blast furnace cinder slag discharge amount on-line measuring device and method

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DE100955C (en) *
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DE2525186B1 (en) * 1975-06-06 1976-01-29 Ajo Stahlbau Automatic control of water addn. in granulating - blast-furnace slag, using temp. of slag-water mixt. to adjust water-valve
LU79466A1 (en) * 1978-04-18 1979-05-25 Sidmar Nv PROCESS AND PLANT FOR TREATMENT AND HANDLING OF METALLURGIC DAIRY
DE2816204B1 (en) * 1978-04-14 1979-09-06 Junker Gmbh O Transport container for molten metal
US4218201A (en) * 1978-07-25 1980-08-19 Nippon Steel Corporation Apparatus for producing solidified granular slag from molten blast furnace slag

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FR1213285A (en) * 1958-01-25 1960-03-30 Siemag Masch Stahlbau Cast iron or slag wagon
DE2525186B1 (en) * 1975-06-06 1976-01-29 Ajo Stahlbau Automatic control of water addn. in granulating - blast-furnace slag, using temp. of slag-water mixt. to adjust water-valve
DE2816204B1 (en) * 1978-04-14 1979-09-06 Junker Gmbh O Transport container for molten metal
LU79466A1 (en) * 1978-04-18 1979-05-25 Sidmar Nv PROCESS AND PLANT FOR TREATMENT AND HANDLING OF METALLURGIC DAIRY
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US5229063A (en) 1993-07-20
LU87896A1 (en) 1992-11-16
BR9200799A (en) 1992-11-17
JPH05105934A (en) 1993-04-27
AU649104B2 (en) 1994-05-12
AU1097892A (en) 1992-09-03
CN1064706A (en) 1992-09-23
RU2025469C1 (en) 1994-12-30
TW212206B (en) 1993-09-01
CA2062168A1 (en) 1992-09-02
CN1027820C (en) 1995-03-08

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