EP0572290A1 - Method and apparatus for feeding a zinc ingot into a zinc bath of a galvanizing line - Google Patents

Method and apparatus for feeding a zinc ingot into a zinc bath of a galvanizing line Download PDF

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Publication number
EP0572290A1
EP0572290A1 EP93401098A EP93401098A EP0572290A1 EP 0572290 A1 EP0572290 A1 EP 0572290A1 EP 93401098 A EP93401098 A EP 93401098A EP 93401098 A EP93401098 A EP 93401098A EP 0572290 A1 EP0572290 A1 EP 0572290A1
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EP
European Patent Office
Prior art keywords
ingot
zinc
ingots
receptacle
feeding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93401098A
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German (de)
French (fr)
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EP0572290B1 (en
Inventor
Bernard Gerson
Pierre Laurenson
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Publication date
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Publication of EP0572290A1 publication Critical patent/EP0572290A1/en
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Publication of EP0572290B1 publication Critical patent/EP0572290B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0068—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising clamps or tongs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0085—Movement of the container or support of the charge in the furnace or in the charging facilities
    • F27D2003/0089—Rotation about a horizontal or slightly inclined axis
    • F27D2003/009—Oscillations about a horizontal axis; Rocking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D2003/125—Charging cars, lift trolleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/22—Ingots

Definitions

  • the present invention relates to galvanizing installations and, more particularly, the device for feeding ingots to the crucible or zinc pot.
  • the zinc crucibles or pots in galvanizing installations are supplied with zinc ingots which are taken from a storage area by a handling device, such as an overhead crane, which is fitted with a clamp which grasps one end of the ingot.
  • the ingot is brought above the zinc pot and the handling device is actuated in order to slowly lower the ingot into the zinc pot where it melts.
  • the clamp of the handling device is opened.
  • the present invention therefore proposes to provide a method and a device for feeding ingots of zinc from a zinc pot of a galvanizing installation which makes it possible to immerse the whole of each ingot in the zinc pot without creating disturbances in the zinc bath and without entailing maintenance or replacement operations. equipment.
  • the receptacle immersed in the zinc bath is at the temperature of the latter and it does not occur the clogging phenomenon which occurs. on the clamps of supply systems of known type.
  • the ingot is placed on the feed table while the latter is in a horizontal position, the ingot handling device is removed, retaining means grip one end of the ingot, inclines the table and the retaining means control the sliding of the ingot along the table.
  • the invention also relates to a device for supplying zinc pots with a zinc pot for a galvanizing line for implementing the above method, characterized in that it comprises a table movable between a horizontal position for receiving the ingots in which it receives one or more ingots and an inclined feeding position in which its lower edge is above the zinc pot, said table comprising means for retaining the ingot or ingots gripping the upper end of the ingot or ingots when it is in the inclined position, said retaining means being actuated to allow the ingot or ingots to descend when the table is in the inclined position, said feeding device comprising, for each ingot carried by the table , a receptacle movable between two positions, a rest position in which it is located in the molten zinc pot and a working position in which it is placed u below the lower edge of the table when the latter is in an inclined position so as to collect the upper end of the ingot when this end is released from said retaining means.
  • the receptacle moves in translation parallel to the table when the latter is in the inclined position.
  • the receptacle comprises a guide sliding along the table when the latter is in the inclined position and supporting at its lower end a basket disposed in overhang on said sliding guide so as to come into the working position, below the lower edge of the table when it is in an inclined position.
  • the sliding guide comprises a slide formed by an inverted U-shaped profile having internal edges and a sliding part constituted by an I-shaped profile and said sliding part is connected by a chain with a motor comprising chain sprockets and a pneumatic or electric gearmotor.
  • the receptacle comprises a sliding guide disposed under the table when the latter is in the inclined position and carrying at its lower end a basket coming, in the working position, to be placed under the lower edge of the table.
  • Figure 1 shows a carriage 1 mobile on rails and carrying a feed table 2.
  • This table is mounted for rotation about a transverse axis 3 perpendicular to the direction of movement of the carriage 1.
  • This axis of rotation 3 is arranged at the end of the carriage and its distance from the free end of the table is approximately equal to a quarter the length of the latter.
  • Table 2 is a feed table for a zinc pot 4 in which there is molten zinc, the upper level of the zinc bath being identified at 5.
  • the feed table 2 can take two positions, a horizontal position for receiving the ingots in which it receives an ingot 6 coming from a storage area and brought via a handling device such as an overhead crane. .
  • the ingot 6 is arranged so as to be in abutment on the free edge 7 of the table 2.
  • Zinc ingots can have a length of 2.25 m, a width of 0.4 m and a height of 0.35 m, for example. Such an ingot weighs 2,000 kg and its upper end or tail which is gripped by retaining means such as a clamp can weigh from 400 to 500 kg (or a lug using a hole).
  • the temperature of the molten zinc in the pot is around 450 ° C.
  • the upper end or tail 8 of the ingot opposite the free edge 7 of the table 2 is gripped by a clamp 9 constituting a device for retaining the ingot and which can move in translation on the table 2 parallel to the longitudinal axis of the ingot 6
  • the movement of the clamp 9 is controlled by a step-by-step electric motor 11.
  • Table 2 can take a second feeding position 2 'which is shown in broken lines; the angle of inclination can vary from 30 ° to 90 °; it is for example 60 °.
  • the free edge 7 of the table 2 is in position 7 'just above level 5 of the molten bath 5 located in the zinc pot 4.
  • the ingot 6' is gripped by the clamp 9 '; for this purpose it has a transverse hole 12 respectively 12 '.
  • the supply device comprises a receptacle 21 which is movable between two positions, a rest position 21 ', which is shown in broken lines in FIG. 2 and its working position 21.
  • a rest position 21 ' which is shown in broken lines in FIG. 2
  • the receptacle 21 In its rest position 21', the receptacle 21 is completely immersed in the molten zinc bath 5. In its working position 21, this receptacle is placed below the free edge 7 ′ of the table in the feeding position while remaining slightly below the upper level 5 of the zinc bath.
  • the receptacle collects the end 8 '' of the ingot 6 '' which has been represented in FIG. 2 in the final feeding position, that is to say that only the end upper 8 '' of the ingot is not yet immersed in the bath 5.
  • the table is returned to the ingot reception position, that is to say it is returned to the horizontal position.
  • the assembly is then ready for a new feeding operation.
  • FIG. 3 represents an embodiment of the invention in which the receptacle consists of a guide 22 which slides along the table 2 when the latter is in the feeding position and of a basket 23 which is arranged in overhang at the lower end of the guide 22 so as to be opposite the free edge 7 'of the table.
  • the sliding guide consists of a fixed slide 24 in the shape of an inverted U and of a sliding element 25 constituted by an I-profile.
  • the upper end of the sliding element 25 is integral with a chain 26 which circulates in the slide 24 and which is wound on chain sprockets in a motor 27 comprising a pneumatic or electric gearmotor.
  • the sliding element 25 rolls on rollers 28 carried by the slide 24.
  • the feed table has a length of 3.4 m and a width of 0.5 m.
  • the basket stroke is approximately 5 m, its translation speed being 0.5 m / min.
  • the ingot descent speed that is to say the speed of movement of the clamp 9, is 2 m / min.
  • the invention makes it possible to immerse the tails of ingots in the zinc pot without making a stir, without the clamps retaining the tails of ingots plunging into the bath.
  • the receptacle Since the receptacle remains permanently in the molten zinc bath, it is not subject to the clogging phenomenon and therefore does not require any unclogging or replacement operation.
  • the downward movement of the ingot tail in the bath is done in a controlled manner, that is to say with a speed slow enough not to cause eddies.
  • the process according to the invention can easily be automated in such a way that no manual intervention is necessary.
  • a receptacle constituted by a sliding guide disposed under the table when the latter is in the inclined position and carrying at its lower end a basket coming, in the working position, to be placed under the lower edge of the table.
  • feed tables carrying several ingots may be made.
  • a mobile receptacle is provided for each of the ingots carried by the table.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating With Molten Metal (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

Process for feeding a zinc pot (4) with ingots (6, 6'') withdrawn from a storage region by a handling device which comprises a clamp grasping one end (8', 8'') of the ingot (6', 6''), the ingots being brought above the zinc pot (4) and lowered slowly into the latter, characterised by the following operations: - a) the ingot (6') is delivered onto an inclined feeding table (2') whose bottom end (7, 7'') is above the zinc pot (4); - b) the ingot (6', 6'') is slid along the table; - c) when the ingot (6'') has been almost completely immersed in the zinc bath (5), a receptacle (21, 21') held in the zinc bath (5) in a resting position (21') is placed below the unmelted upper end (8'') of the ingot (6''); - d) the said upper end (8'') of the ingot is released; and - e) the said receptacle (21) moves back down into its resting position. <IMAGE>

Description

La présente invention concerne les installations de galvanisation et, plus particulièrement, le dispositif d'alimentation en lingots du creuset ou pot de zinc.The present invention relates to galvanizing installations and, more particularly, the device for feeding ingots to the crucible or zinc pot.

Les creusets ou pots de zinc des installations de galvanisation sont alimentés par des lingots de zinc qui sont prélevés dans une zone de stockage par un dispositif de manutention, tel qu'un pont roulant, qui est muni d'une pince qui saisit une extrémité du lingot. Le lingot est amené au-dessus du pot de zinc et le dispositif de manutention est actionné afin de faire descendre lentement le lingot dans le pot de zinc où il fond. Lorsque l'ensemble du lingot a plongé dans le zinc en fusion, on ouvre la pince du dispositif de manutention.The zinc crucibles or pots in galvanizing installations are supplied with zinc ingots which are taken from a storage area by a handling device, such as an overhead crane, which is fitted with a clamp which grasps one end of the ingot. The ingot is brought above the zinc pot and the handling device is actuated in order to slowly lower the ingot into the zinc pot where it melts. When the whole ingot has plunged into the molten zinc, the clamp of the handling device is opened.

Ce processus présente l'inconvénient que la pince plonge dans le zinc en fusion et, du fait que cette pince se trouve pratiquement à la température ambiante, du zinc en fusion vient se fixer sur la pince qui est rapidement inutilisable du fait qu'elle est trop colmatée.This process has the disadvantage that the clamp plunges into the molten zinc and, because this clamp is practically at room temperature, molten zinc is fixed on the clamp which is quickly unusable because it is too clogged.

Les opérations de décolmatage ou de remplacement des pinces entraînent des perturbations dans le processus d'alimentation des pots de zinc.The operations of unclogging or replacing the pliers cause disturbances in the process of feeding the zinc pots.

Une autre solution consiste à ouvrir la pince avant qu'elle ne plonge dans le bain de zinc en fusion; mais dans ce cas, l'extrémité non encore fondue du lingot qui peut peser jusqu'à 400 à 500 kg tombe brusquement dans le bain, ce qui crée des remous et modifie donc les caractéristiques du bain, en particulier en ce qui concerne la pellicule supérieure du bain.Another solution is to open the clamp before it plunges into the bath of molten zinc; but in this case, the not yet melted end of the ingot which can weigh up to 400 to 500 kg suddenly falls into the bath, which creates eddies and therefore modifies the characteristics of the bath, in particular with regard to the film top of the bath.

Une autre solution consiste à récupérer les extrémités des lingots se trouvant dans la pince, ce qui entraîne une dépense importante en main-d'oeuvre et en installation.Another solution is to recover the ends of the ingots in the clamp, which results in a significant expense in labor and installation.

La présente invention se propose donc de fournir un procédé et un dispositif d'alimentation en lingots de zinc d'un pot de zinc d'une installation de galvanisation qui permet de plonger l'intégralité de chaque lingot dans le pot en zinc sans créer de perturbations dans le bain de zinc et sans entraîner d'opérations d'entretien ou de remplacement de matériel.The present invention therefore proposes to provide a method and a device for feeding ingots of zinc from a zinc pot of a galvanizing installation which makes it possible to immerse the whole of each ingot in the zinc pot without creating disturbances in the zinc bath and without entailing maintenance or replacement operations. equipment.

A cet effet, l'invention a pour objet un procédé d'alimentation en lingots de zinc d'un pot de zinc d'une ligne de galvanisation, dans lequel les lingots sont prélevés dans une zone de stockage par un dispositif de manutention tel qu'un pont roulant, qui comporte une pince saisissant une extrémité du lingot, les lingots étant amenés au-dessus du pot de zinc et descendus lentement dans ce dernier, caractérisé par les opérations suivantes :

  • - a) le lingot est tout d'abord amené sur une table d'alimentation inclinée dont l'extrémité basse se trouve au-dessus du pot de zinc ;
  • - b) on fait coulisser le lingot le long de la table d'alimentation dans le pot de zinc ;
  • - c) lorsque le lingot a été presque totalement immergé dans le bain de zinc, un réceptacle, qui est maintenu dans le bain de zinc dans une position de repos, vient se placer en dessous de l'extrémité supérieure non fondue du lingot ;
  • d) ladite extrémité supérieure du lingot est libérée ; et
  • e) ledit réceptacle redescend dans sa position de repos.
To this end, the subject of the invention is a method of supplying zinc ingots to a zinc pot of a galvanizing line, in which the ingots are removed from a storage area by a handling device such as 'an overhead crane, which includes a clamp gripping one end of the ingot, the ingots being brought above the zinc pot and slowly descended into the latter, characterized by the following operations:
  • - a) the ingot is first of all brought to an inclined feed table, the lower end of which is above the zinc pot;
  • - b) the ingot is slid along the feeding table in the zinc pot;
  • - c) when the ingot has been almost completely immersed in the zinc bath, a receptacle, which is maintained in the zinc bath in a rest position, is placed below the upper non-molten end of the ingot;
  • d) said upper end of the ingot is released; and
  • e) said receptacle descends to its rest position.

Du fait que le réceptacle vient récupérer l'extrémité supérieure du lingot, cette dernière pénètre dans le bain sans créer de remous.Because the receptacle comes to recover the upper end of the ingot, the latter enters the bath without creating eddies.

Par ailleurs, le réceptacle plongeant dans le bain de zinc est à la température de ce dernier et il ne se produit pas le phénomène de colmatage qui se produit sur les pinces des installations d'alimentation de type connu.Furthermore, the receptacle immersed in the zinc bath is at the temperature of the latter and it does not occur the clogging phenomenon which occurs. on the clamps of supply systems of known type.

Selon une autre caractéristique de l'invention, on place le lingot sur la table d'alimentation alors que celle-ci se trouve en position horizontale, on décroche le dispositif de manutention du lingot, des moyens de retenue saisissent une extrémité du lingot, on incline la table et les moyens de retenue commandent le coulissement du lingot le long de la table.According to another characteristic of the invention, the ingot is placed on the feed table while the latter is in a horizontal position, the ingot handling device is removed, retaining means grip one end of the ingot, inclines the table and the retaining means control the sliding of the ingot along the table.

L'invention a également pour objet un dispositif d'alimentation en pots de zinc d'un pot de zinc d'une ligne de galvanisation pour la mise en oeuvre du procédé ci-dessus, caractérisé en ce qu'il comporte une table mobile entre une position horizontale de réception des lingots dans laquelle elle reçoit un ou plusieurs lingots et une position inclinée d'alimentation dans laquelle son bord inférieur se trouve au-dessus du pot de zinc, ladite table comportant des moyens de retenue du ou des lingots saisissant l'extrémité supérieure du ou des lingots lorsqu'elle est en position inclinée, lesdits moyens de retenue étant actionnés pour laisser descendre le ou les lingots lorsque la table est en position inclinée, ledit dispositif d'alimentation comportant, pour chaque lingot porté par la table, un réceptacle mobile entre deux positions, une position de repos dans laquelle il se trouve dans le pot de zinc en fusion et une position de travail dans laquelle il vient se placer au dessous du bord inférieur de la table lorsque celle-ci est en position inclinée de manière à recueillir l'extrémité supérieure du lingot lorsque cette extrémité est libérée desdits moyens de retenue.The invention also relates to a device for supplying zinc pots with a zinc pot for a galvanizing line for implementing the above method, characterized in that it comprises a table movable between a horizontal position for receiving the ingots in which it receives one or more ingots and an inclined feeding position in which its lower edge is above the zinc pot, said table comprising means for retaining the ingot or ingots gripping the upper end of the ingot or ingots when it is in the inclined position, said retaining means being actuated to allow the ingot or ingots to descend when the table is in the inclined position, said feeding device comprising, for each ingot carried by the table , a receptacle movable between two positions, a rest position in which it is located in the molten zinc pot and a working position in which it is placed u below the lower edge of the table when the latter is in an inclined position so as to collect the upper end of the ingot when this end is released from said retaining means.

Selon un mode de réalisation de l'invention, le réceptacle se déplace en translation parallèlement à la table lorsque celle-ci est en position inclinée.According to one embodiment of the invention, the receptacle moves in translation parallel to the table when the latter is in the inclined position.

Avantageusement, le réceptacle comporte un guide coulissant le long de la table lorsque celle-ci est en position inclinée et supportant à son extrémité inférieure un panier disposé en porte-à-faux sur ledit guide coulissant de manière à venir, en position de travail, en dessous du bord inférieur de la table lorsque celle-ci est en position inclinée.Advantageously, the receptacle comprises a guide sliding along the table when the latter is in the inclined position and supporting at its lower end a basket disposed in overhang on said sliding guide so as to come into the working position, below the lower edge of the table when it is in an inclined position.

Selon un autre mode de réalisation de l'invention, le guide coulissant comporte une glissière constituée par un profilé en forme de U renversé comportant des rebords intérieurs et une pièce coulissante constituée par un profilé en forme de I et ladite pièce coulissante est reliée par une chaîne à un moteur comportant des pignons-chaînes et un motoréducteur pneumatique ou électrique.According to another embodiment of the invention, the sliding guide comprises a slide formed by an inverted U-shaped profile having internal edges and a sliding part constituted by an I-shaped profile and said sliding part is connected by a chain with a motor comprising chain sprockets and a pneumatic or electric gearmotor.

Selon encore un autre mode réalisation de l'invention, le réceptacle comporte un guide coulissant disposé sous la table lorsque celle-ci est en position inclinée et portant à son extrémité inférieure un panier venant, en position de travail, se placer sous le bord inférieur de la table.According to yet another embodiment of the invention, the receptacle comprises a sliding guide disposed under the table when the latter is in the inclined position and carrying at its lower end a basket coming, in the working position, to be placed under the lower edge of the table.

D'autres caractéristiques et avantages de l'invention ressortiront de la description qui suit d'un exemple de réalisation, faite en se référant aux dessins annexés sur lesquels :

  • la figure 1 est une vue générale d'un dispositif d'alimentation en lingots d'un pot de zinc ;
  • la figure 2 est une vue de côté de la table et du réceptacle ;
  • la figure 3 est une vue schématique d'un mode de réalisation de l'invention ; et
  • la figure 4 est une vue de détail du mode de réalisation de la figure 4.
Other characteristics and advantages of the invention will emerge from the description which follows of an exemplary embodiment, made with reference to the appended drawings in which:
  • Figure 1 is a general view of a device for feeding ingots of a zinc pot;
  • Figure 2 is a side view of the table and the receptacle;
  • Figure 3 is a schematic view of an embodiment of the invention; and
  • FIG. 4 is a detailed view of the embodiment of FIG. 4.

La figure 1 présente un chariot 1 mobile sur des rails et portant une table d'alimentation 2. Cette table est montée à rotation autour d'un axe transversal 3 perpendiculaire à la direction de déplacement du chariot 1. Cet axe de rotation 3 est disposé à l'extrémité du chariot et sa distance à l'extrémité libre de la table est environ égale au quart de la longueur de cette dernière.Figure 1 shows a carriage 1 mobile on rails and carrying a feed table 2. This table is mounted for rotation about a transverse axis 3 perpendicular to the direction of movement of the carriage 1. This axis of rotation 3 is arranged at the end of the carriage and its distance from the free end of the table is approximately equal to a quarter the length of the latter.

La table 2 est une table d'alimentation pour un pot de zinc 4 dans lequel se trouve du zinc en fusion, le niveau supérieur du bain de zinc étant repéré en 5.Table 2 is a feed table for a zinc pot 4 in which there is molten zinc, the upper level of the zinc bath being identified at 5.

La table d'alimentation 2 peut prendre deux positions, une position horizontale de réception des lingots dans laquelle elle reçoit un lingot 6 provenant d'une zone de stockage et amenée par l'intermédiaire d'un dispositif de manutention tel qu'un pont roulant. Le lingot 6 est disposé de manière à se trouver en appui sur le bord libre 7 de la table 2.The feed table 2 can take two positions, a horizontal position for receiving the ingots in which it receives an ingot 6 coming from a storage area and brought via a handling device such as an overhead crane. . The ingot 6 is arranged so as to be in abutment on the free edge 7 of the table 2.

Les lingots de zinc peuvent présenter par exemple une longueur de 2,25 m, une largeur de 0,4 m et une hauteur de 0,35 m. Un tel lingot pèse 2.000 kg et son extrémité supérieure ou queue qui est saisie par des moyens de retenue tels qu'une pince peut peser de 400 à 500 kg (ou un ergot à l'aide d'un trou).Zinc ingots can have a length of 2.25 m, a width of 0.4 m and a height of 0.35 m, for example. Such an ingot weighs 2,000 kg and its upper end or tail which is gripped by retaining means such as a clamp can weigh from 400 to 500 kg (or a lug using a hole).

La température du zinc en fusion dans le pot est d'environ 450°C.The temperature of the molten zinc in the pot is around 450 ° C.

L'extrémité supérieure ou queue 8 du lingot opposée au bord libre 7 de la table 2 est saisie par une pince 9 constituant un dispositif de retenue du lingot et pouvant se déplacer en translation sur la table 2 parallèlement à l'axe longitudinal du lingot 6. Le déplacement de la pince 9 est commandé par un moteur électrique pas-à-pas 11.The upper end or tail 8 of the ingot opposite the free edge 7 of the table 2 is gripped by a clamp 9 constituting a device for retaining the ingot and which can move in translation on the table 2 parallel to the longitudinal axis of the ingot 6 The movement of the clamp 9 is controlled by a step-by-step electric motor 11.

La table 2 peut prendre une deuxième position d'alimentation 2' qui est représentée en trait interrompu; l'angle d'inclinaison peut varier de 30° à 90°; il est par exemple de 60°. Dans cette position d'alimentation, le bord libre 7 de la table 2 se trouve dans la position 7' juste au-dessus du niveau 5 du bain de fusion 5 se trouvant dans le pot de zinc 4. Dans cette position, le lingot 6' est saisi par la pince 9'; il présente à cet effet un trou transversal 12 respectivement 12'.Table 2 can take a second feeding position 2 'which is shown in broken lines; the angle of inclination can vary from 30 ° to 90 °; it is for example 60 °. In this feeding position, the free edge 7 of the table 2 is in position 7 'just above level 5 of the molten bath 5 located in the zinc pot 4. In this position, the ingot 6' is gripped by the clamp 9 '; for this purpose it has a transverse hole 12 respectively 12 '.

Le dispositif d'alimentation comporte un réceptacle 21 qui est mobile entre deux positions, une position de repos 21', qui est représentée en trait interrompu sur la figure 2 et sa position de travail 21. Dans sa position de repos 21', le réceptacle 21 est complètement immergé dans le bain de zinc en fusion 5. Dans sa position de travail 21, ce réceptacle vient se placer au dessous du bord libre 7' de la table en position d'alimentation en restant légèrement en dessous du niveau supérieur 5 du bain de zinc.The supply device comprises a receptacle 21 which is movable between two positions, a rest position 21 ', which is shown in broken lines in FIG. 2 and its working position 21. In its rest position 21', the receptacle 21 is completely immersed in the molten zinc bath 5. In its working position 21, this receptacle is placed below the free edge 7 ′ of the table in the feeding position while remaining slightly below the upper level 5 of the zinc bath.

Dans cette position de travail 21, le réceptacle vient recueillir l'extrémité 8'' du lingot 6'' qui a été représenté sur la figure 2 dans la position finale d'alimentation, c'est-à-dire que seule l'extrémité supérieure 8'' du lingot n'est pas encore plongée dans le bain 5.In this working position 21, the receptacle collects the end 8 '' of the ingot 6 '' which has been represented in FIG. 2 in the final feeding position, that is to say that only the end upper 8 '' of the ingot is not yet immersed in the bath 5.

Lorsque cette extrémité supérieure 8'' repose dans le réceptacle 21, la pince 9 est libérée et elle remonte en position initiale pendant que le réceptacle 21 revient à sa position de repos 21'' de telle sorte que l'extrémité supérieure 8'' du lingot est immergée dans le bain 5 et fondue.When this upper end 8 '' rests in the receptacle 21, the clamp 9 is released and it returns to the initial position while the receptacle 21 returns to its rest position 21 '' so that the upper end 8 '' of the ingot is immersed in bath 5 and melted.

La table est ramenée en position de réception des lingots, c'est-à-dire qu'elle est ramenée en position horizontale. L'ensemble est alors prêt pour une nouvelle opération d'alimentation.The table is returned to the ingot reception position, that is to say it is returned to the horizontal position. The assembly is then ready for a new feeding operation.

La figure 3 représente un mode de réalisation de l'invention dans lequel le réceptacle est constitué d'un guide 22 qui coulisse le long de la table 2 lorsque celle-ci est en position d'alimentation et d'un panier 23 qui est disposé en porte-à-faux à l'extrémité inférieure du guide 22 de manière à se trouver en face du bord libre 7' de la table.FIG. 3 represents an embodiment of the invention in which the receptacle consists of a guide 22 which slides along the table 2 when the latter is in the feeding position and of a basket 23 which is arranged in overhang at the lower end of the guide 22 so as to be opposite the free edge 7 'of the table.

Comme on peut le voir sur la figure 4, le guide coulissant est constitué d'une glissière fixe 24 en forme de U renversé et d'un élément coulissant 25 constitué par un profilé en I. L'extrémité supérieure de l'élément coulissant 25 est solidaire d'une chaîne 26 qui circule dans la glissière 24 et qui vient s'enrouler sur des pignons-chaînes dans un moteur 27 comportant un motoréducteur pneumatique ou électrique. L'élément coulissant 25 roule sur des galets 28 portés par la glissière 24.As can be seen in FIG. 4, the sliding guide consists of a fixed slide 24 in the shape of an inverted U and of a sliding element 25 constituted by an I-profile. The upper end of the sliding element 25 is integral with a chain 26 which circulates in the slide 24 and which is wound on chain sprockets in a motor 27 comprising a pneumatic or electric gearmotor. The sliding element 25 rolls on rollers 28 carried by the slide 24.

Dans un exemple de réalisation, la table d'alimentation a une longueur de 3,4 m et une largeur de 0,5 m. La course du panier est d'environ 5 m, sa vitesse de translation étant de 0,5 m/mn. La vitesse de descente du lingot, c'est-à-dire la vitesse de déplacement de la pince 9, est de 2 m/mn.In an exemplary embodiment, the feed table has a length of 3.4 m and a width of 0.5 m. The basket stroke is approximately 5 m, its translation speed being 0.5 m / min. The ingot descent speed, that is to say the speed of movement of the clamp 9, is 2 m / min.

On voit que l'invention permet d'immerger sans faire de remous les queues de lingots dans le pot de zinc sans que les pinces de retenue des queues de lingots ne plongent dans le bain.It can be seen that the invention makes it possible to immerse the tails of ingots in the zinc pot without making a stir, without the clamps retaining the tails of ingots plunging into the bath.

Le réceptacle restant en permanence dans le bain de zinc en fusion, il n'est pas soumis au phénomène de colmatage et par conséquent, ne nécessite pas d'opération de décolmatage ou de remplacement.Since the receptacle remains permanently in the molten zinc bath, it is not subject to the clogging phenomenon and therefore does not require any unclogging or replacement operation.

Par ailleurs, le mouvement de descente de la queue de lingot dans le bain se fait de manière contrôlée c'est-à-dire avec une vitesse suffisamment lente pour ne pas entraîner de remous.Furthermore, the downward movement of the ingot tail in the bath is done in a controlled manner, that is to say with a speed slow enough not to cause eddies.

Le procédé selon l'invention peut facilement être automatisé de telle manière qu'aucune intervention manuelle n'est nécessaire. On peut par exemple prévoir des interrupteurs fin de course pour la pince 9 qui commandent la remontée du réceptacle.The process according to the invention can easily be automated in such a way that no manual intervention is necessary. One can for example provide limit switches for the clamp 9 which control the raising of the receptacle.

La description ci-dessus n'a été fournie qu'à titre d'exemple non limitatif et il est évident que l'on peut y apporter des modifications ou variantes sans pour autant sortir du cadre de la présente invention.The above description has been provided only by way of nonlimiting example and it is obvious that modifications or variants can be made without departing from the scope of the present invention.

C'est ainsi que l'on peut prévoir un réceptacle constitué par un guide coulissant disposé sous la table lorsqu'elle celle-ci est en position inclinée et portant à son extrémité inférieure un panier venant, en position de travail, se placer sous le bord inférieur de la table.Thus one can provide a receptacle constituted by a sliding guide disposed under the table when the latter is in the inclined position and carrying at its lower end a basket coming, in the working position, to be placed under the lower edge of the table.

Par ailleurs, on peut prévoir des tables d'alimentation portant plusieurs lingots, par exemple deux. Dans ce cas, on prévoit un réceptacle mobile pour chacun des lingots portés par la table.Furthermore, provision may be made for feed tables carrying several ingots, for example two. In this case, a mobile receptacle is provided for each of the ingots carried by the table.

Claims (7)

Procédé d'alimentation en lingots de zinc (6,6',6'') d'un pot de zinc (4) d'une ligne de galvanisation, dans lequel les lingots sont prélevés dans une zone de stockage par un dispositif de manutention tel qu'un pont roulant, qui comporte une pince saisissant une extrémité du lingot, les lingots étant amenés au-dessus du pot de zinc et descendus lentement dans ce dernier, caractérisé par les opérations suivantes : - a) le lingot (6,6',6'') est tout d'abord amené sur une table d'alimentation (2,2') inclinée dont l'extrémité basse se trouve au-dessus du pot de zinc ; - b) on fait coulisser le lingot le long de la table d'alimentation dans le pot de zinc ; - c) lorsque le lingot (6,6',6'') a été presque totalement immergé dans le bain de zinc (5), un réceptacle (21,21'), qui est maintenu dans le bain de zinc (5) dans une position de repos (21'), vient se placer en dessous de l'extrémité supérieure (8,8',8'') non fondue du lingot (6,6',6'') ; d) ladite extrémité supérieure (8,8',8'') du lingot est libérée ; et e) ledit réceptacle redescend dans sa position de repos (21'). Method for supplying zinc ingots (6,6 ', 6'') to a zinc pot (4) of a galvanizing line, in which the ingots are taken from a storage area by a handling device such as an overhead crane, which has a clamp gripping one end of the ingot, the ingots being brought above the zinc pot and lowered slowly into the latter, characterized by the following operations: - a) the ingot (6,6 ', 6'') is firstly brought to an inclined feed table (2,2') whose lower end is above the zinc pot; - b) the ingot is slid along the feeding table in the zinc pot; - c) when the ingot (6,6 ', 6'') has been almost completely immersed in the zinc bath (5), a receptacle (21,21'), which is held in the zinc bath (5) in a rest position (21 '), is placed below the upper end (8.8', 8 '') of the ingot (6.6 ', 6''); d) said upper end (8.8 ', 8'') of the ingot is released; and e) said receptacle descends to its rest position (21 '). Procédé d'alimentation en lingots de zinc (6) d'un pot de zinc (4) d'une ligne de galvanisation selon la revendication 1, caractérisé en ce qu'on place le lingot (6) sur la table d'alimentation (2) alors que celle-ci se trouve en position horizontale, en ce qu'on décroche le dispositif de manutention du lingot, en ce que des moyens de retenue (9) saisissent une extrémité (8) du lingot, en ce qu'on incline la table et en ce que les moyens de retenue commandent le coulissement du lingot le long de la table.Method for feeding zinc ingots (6) to a zinc pot (4) of a galvanizing line according to claim 1, characterized in that the ingot (6) is placed on the feeding table ( 2) while the latter is in a horizontal position, in that the ingot handling device is detached, in that retaining means (9) grip an end (8) of the ingot, in that inclines the table and in that the retaining means control the sliding of the ingot along the table. Dispositif d'alimentation en lingots de zinc d'un pot de zinc d'une ligne de galvanisation pour la mise en oeuvre du procédé selon la revendication 1 ou 2, caractérisé en ce qu'il comporte une table mobile (2,2') entre une position horizontale (2) de réception des lingots (6,6',6'') dans laquelle elle reçoit un ou plusieurs lingots (6,6',6'') et une position inclinée (2') d'alimentation dans laquelle son bord inférieur (7') se trouve au-dessus du pot de zinc (4), ladite table (7,7') comportant des moyens de retenue (9,9') du ou des lingots (6,6',6'') saisissant l'extrémité supérieure (8,8',8'') du ou des lingots (6,6',6'') lorsqu'elle est en position inclinée (2'), lesdits moyens de retenue (9,9') étant actionnés pour laisser descendre le ou les lingots (6,6',6'') lorsque la table (2) est en position inclinée (2'), ledit dispositif d'alimentation comportant, pour chaque lingot (6,6',6'') porté par la table (2,2'), un réceptacle (21) mobile entre deux positions, une position de repos (21') dans laquelle il se trouve dans le pot de zinc en fusion (4) et une position de travail (21) dans laquelle il vient se placer au dessous du bord inférieur (7') de la table (2') lorsque celle-ci est en position inclinée de manière à recueillir l'extrémité supérieure du lingot (8,8',8'') lorsque cette extrémité est libérée desdits moyens de retenue (9,9').Device for supplying zinc ingots to a zinc pot of a galvanizing line for implementing the method according to claim 1 or 2, characterized in that it comprises a movable table (2,2 ') between a horizontal position (2) for receiving the ingots (6,6 ', 6' ') in which it receives one or more ingots (6,6', 6 '') and an inclined position (2 ') for feeding in which its lower edge (7 ') is located above the zinc pot (4), said table (7,7') having retaining means (9,9 ') of the ingot (s) (6,6' , 6 '') gripping the upper end (8.8 ', 8' ') of the ingot (s) (6.6', 6 '') when in the inclined position (2 '), said retaining means (9,9 ') being actuated to let down the ingot (s) (6,6', 6 '') when the table (2) is in the inclined position (2 '), said feed device comprising, for each ingot (6,6 ', 6' ') carried by the table (2,2'), a receptacle (21) movable between two positions, a pos rest ition (21 ') in which it is in the molten zinc pot (4) and a working position (21) in which it is placed below the lower edge (7') of the table (2 ') when the latter is in an inclined position so as to collect the upper end of the ingot (8.8', 8 '') when this end is released from said retaining means (9.9 '). Dispositif d'alimentation selon la revendication 3 , caractérisé en ce que le réceptacle (21,21') se déplace en translation parallèlement à la table (2,2') lorsque celle-ci est en position inclinée (2').Feeding device according to claim 3, characterized in that the receptacle (21,21 ') moves in translation parallel to the table (2,2') when the latter is in the inclined position (2 '). Dispositif d'alimentation selon la revendication 4, caractérisé en ce que le réceptacle (21) comporte un guide (22) coulissant le long de la table (2,2') lorsque celle-ci est en position inclinée (2') et supportant à son extrémité inférieure un panier (23) disposé en porte-à-faux sur ledit guide coulissant de manière à venir, en position de travail, en dessous du bord inférieur (7') de la table (2') lorsque celle-ci est en position inclinée.Feeding device according to claim 4, characterized in that the receptacle (21) comprises a guide (22) sliding along the table (2,2 ') when the latter is in the inclined position (2') and supporting at its lower end a basket (23) arranged in overhang on said sliding guide so as to come, in the working position, below the lower edge (7 ') of the table (2') when the latter is in the inclined position. Dispositif d'alimentation selon la revendication 5, caractérisé en ce que le guide coulissant (22) comporte une glissière (24) constituée par un profilé en forme de U renversé comportant des rebords intérieurs et une pièce coulissante (25) constituée par un profilé en forme de I et en ce que ladite pièce coulissante (25) est reliée par une chaîne (26) à un moteur (27) comportant des pignons-chaînes et un motoréducteur pneumatique ou électrique.Feeding device according to claim 5, characterized in that the sliding guide (22) comprises a slide (24) constituted by an inverted U-shaped profile having internal edges and a sliding part (25) constituted by a shape of I and in that said sliding part (25) is connected by a chain (26) to a motor (27) comprising chain sprockets and a pneumatic or electric gearmotor. Dispositif d'alimentation selon la revendication 4, caractérisé en ce que le réceptacle (21) comporte un guide coulissant disposé sous la table (2) lorsque celle-ci est en position inclinée (2') et portant à son extrémité inférieure un panier venant, en position de travail, se placer sous le bord inférieur (7') de la table (2').Feeding device according to claim 4, characterized in that the receptacle (21) comprises a sliding guide disposed under the table (2) when the latter is in the inclined position (2 ') and carrying at its lower end a basket coming from , in the working position, place yourself under the lower edge (7 ') of the table (2').
EP93401098A 1992-05-27 1993-04-27 Method and apparatus for feeding a zinc ingot into a zinc bath of a galvanizing line Expired - Lifetime EP0572290B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9206501 1992-05-27
FR9206501A FR2691719B1 (en) 1992-05-27 1992-05-27 Method and device for supplying zinc ingots to a zinc pot of a galvanizing line.

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EP0572290A1 true EP0572290A1 (en) 1993-12-01
EP0572290B1 EP0572290B1 (en) 1995-06-28

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AT (1) ATE124469T1 (en)
DE (1) DE69300219T2 (en)
ES (1) ES2076829T3 (en)
FR (1) FR2691719B1 (en)

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Publication number Priority date Publication date Assignee Title
CN108315679A (en) * 2018-05-08 2018-07-24 郑州京华制管有限公司 Steel tube hot galvanizing pot automatic zincification device and its zincification method
KR102038483B1 (en) * 2019-09-11 2019-10-30 주식회사 리배산업 Plating bath concentration and level management system
CN110817379A (en) * 2019-11-07 2020-02-21 徐州鑫泰镀锌设备有限公司 Chain conveyor suitable for galvanizing production

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DE102008047051B4 (en) * 2008-09-13 2019-11-14 Sms Group Gmbh Charging device and method for its operation

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EP0084090A1 (en) * 1981-12-07 1983-07-27 PREH, Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH &amp; Co. Ingot charging equipment for a hot chamber die casting machine
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Publication number Priority date Publication date Assignee Title
CN108315679A (en) * 2018-05-08 2018-07-24 郑州京华制管有限公司 Steel tube hot galvanizing pot automatic zincification device and its zincification method
CN108315679B (en) * 2018-05-08 2023-09-19 郑州京华制管有限公司 Automatic zinc adding device and zinc adding method for steel pipe hot galvanizing pot
KR102038483B1 (en) * 2019-09-11 2019-10-30 주식회사 리배산업 Plating bath concentration and level management system
CN110817379A (en) * 2019-11-07 2020-02-21 徐州鑫泰镀锌设备有限公司 Chain conveyor suitable for galvanizing production

Also Published As

Publication number Publication date
DE69300219T2 (en) 1995-11-02
FR2691719A1 (en) 1993-12-03
DE69300219D1 (en) 1995-08-03
ATE124469T1 (en) 1995-07-15
FR2691719B1 (en) 1994-12-23
ES2076829T3 (en) 1995-11-01
EP0572290B1 (en) 1995-06-28

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