[go: up one dir, main page]

EP0699112A1 - Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same - Google Patents

Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same

Info

Publication number
EP0699112A1
EP0699112A1 EP94916280A EP94916280A EP0699112A1 EP 0699112 A1 EP0699112 A1 EP 0699112A1 EP 94916280 A EP94916280 A EP 94916280A EP 94916280 A EP94916280 A EP 94916280A EP 0699112 A1 EP0699112 A1 EP 0699112A1
Authority
EP
European Patent Office
Prior art keywords
siphon
casting
molten metal
casting machine
cast iron
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
EP94916280A
Other languages
German (de)
French (fr)
Other versions
EP0699112B1 (en
Inventor
Claude Rotharmel
Yvon Gallo
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson 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 Pont a Mousson SA filed Critical Pont a Mousson SA
Publication of EP0699112A1 publication Critical patent/EP0699112A1/en
Application granted granted Critical
Publication of EP0699112B1 publication Critical patent/EP0699112B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/145—Plants for continuous casting for upward casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • B22D35/045—Runner base plates for bottom casting ingots

Definitions

  • the present invention relates to the casting of molten metals, and more particularly to the continuous vertical casting of metal parts, in particular cast iron tubes. Although it applies to the casting of different types of metal parts, it is particularly advantageous for the casting of thin cast iron tubes.
  • thin tube applies to a tube whose thickness / diameter ratio is small, less than ten percent, rather than the thickness considered in itself.
  • the invention relates more precisely to a device for supplying molten metal to a casting machine, in particular for an installation for continuous vertical upward casting of cast iron tubes, said supply device being disposed between a source of molten metal. and the casting machine.
  • the source of molten metal is typically a cast iron ladle and the casting machine an upward continuous casting machine for metal parts, of the vertical die type.
  • the invention therefore relates to an intermediate link of a casting installation arranged between the source of molten metal and the device for casting metal parts as such.
  • the document FR-A-2,547,517 relating to a vertical continuous casting installation with a hot inlet die for the casting of metal tubes has already described a device for supplying liquid iron, placed between a ladle and a worm die.
  • This supply device comprises a siphon block consisting of a single piece made of a " refractory material of the silico-aluminous type or of graphite.
  • This siphon block comprises a vertical chimney surmounted by a funnel for receiving the cast iron and a horizontal runner tightly connected to the lower end of the die to which it serves as a base or support.
  • This siphon block poses a certain number of problems. Indeed, given the high temperatures involved in the casting of molten metals, the siphon block is quickly damaged during the continuous casting process.
  • a graphite siphon in addition to its relatively high cost, is gradually worn and / or consumed by the molten iron which is in contact with it.
  • a siphon block in one piece is a relatively massive part of a diffici ⁇ le implementation, which also complicates the handling required when replacing the siphon. The consumption of graphite can cause a change in the composition of the cast iron, outside of the desired analysis.
  • the object of the present invention is to remedy the drawbacks presented by known devices for supplying molten metal, and in particular to be connected by siphon blocks as known in the prior art.
  • the subject of the invention is therefore a device for supplying molten metal to a casting machine, in particular for an installation of continuous vertical upward casting of cast iron tubes, said supply device being arranged between a source of metal. in fusion and the casting machine, this device being characterized in that it has a modular structure comprising on the one hand a siphon for supplying molten metal from the metal source to the casting machine, and on the other part of the removable heating plates of the siphon, arranged around the latter and in contact with it. According to other characteristics of the invention tion:
  • the siphon is an interchangeable part, in particular made of molded refractory concrete
  • the siphon is a part having a substantially U shape, comprising a first substantially vertical channel terminated upwards by an inlet for molten metal, a second substantially vertical channel opening at the base of the casting machine by a outlet for molten metal, and a substantially horizontal channel connecting the vertical channels together;
  • the part has around the second channel a frustoconical shape intended to cooperate with a tight seal with the conjugate base of the casting machine;
  • the device further comprises a carcass of refractory material, surrounding the siphon and the heating plates so as to leave a space between the interior of the carcass and the heating plates, said space being filled with a thermal insulating material and chemical protector,;
  • the carcass comprises means for heating the heating plates, in particular constituted by an inductor circuit embedded in the carcass, the heating plates acting as armature; - the thermal insulating and chemical protective material is fine foundry sand;
  • the heating plates are made of graphite
  • the siphon has flat support faces of each heating plate.
  • the invention also relates to an installation for casting metal parts, in particular for vertical upward continuous casting of tubes in cast iron, characterized in that it comprises a device for supplying molten metal as defined above.
  • FIG. 1 is an elevational and sectional view of a device for supplying molten iron according to the prior art, connected to a die for the continuous casting of cast iron tubes;
  • FIG. 2 is an elevational and sectional view of the molten metal supply device according to the invention
  • FIG. 3 is an exploded perspective view of graphite susceptors used in the supply device according to the invention
  • FIG. 4 is an elevational and sectional view of a refractory concrete siphon used in the supply device according to the invention.
  • FIG. 5 is a top view of the siphon of Figure 4.
  • FIG. 6 is a sectional and perspective view of the molten metal supply device according to the invention.
  • a known device for supplying 1 of molten cast iron, for supplying a die 2 intended for forming tubes of cast iron T by continuous upward casting according to document FR-A- 2547517.
  • the supply device 1 strictly speaking consists of a siphon block 3 substantially in the shape of an L.
  • This siphon block 3 is es ⁇ sentially made in one piece in a refractory material of the silico-aluminous type or in graphite.
  • the siphon block 3 includes a supply chimney 4 terminated at its upper part by a flare 5 in the form of a funnel.
  • the horizontal part 6 of the siphon block incorporates a horizontal pouring channel 7 opening on one side into the supply chimney 4, and on the other side in a portion of vertical ascending channel 8 ending in a frustoconical flare 9 opening into the lower part 10 of the die.
  • the die essentially consists of a cylindrical tube 11 made of graphite, surrounded at its lower part 10 by a refractory ring 12 in which are embedded the cables 13 of an inductor circuit intended to keep the liquid metal above its point of fusion.
  • the die 2 is surrounded in its upper part 14 by a cooling circuit 15 which allows a gradual solidification of the molten iron for the formation of tubes.
  • a ladle P constitutes the source of molten cast iron for the feed device 1, which in turn feeds the die 2.
  • the siphon block 3 of this supply device 1 is the element which poses the problems which the present invention proposes to solve. Indeed, this block in one piece is difficult to handle and install, and a high cost, especially when made of graphite. In addition, it gradually deteriorates during casting by wear or consumption under the action of molten iron. Consequently, in this supply device 1 according to the state of the art, the siphon block 3 must be replaced in its entirety as soon as a certain number of tubes have been poured.
  • This figure illustrates a supply device 1 made of molten metal according to the invention.
  • the invention will be described in the context of a continuous casting device for cast iron tubes similar to the device in FIG. 1, supplying a die 2, but only by way of example.
  • the invention provides a modular supply device, a centerpiece of which is an interchangeable siphon and of very low cost.
  • the invention can be implemented in the context of casting installations using metals other than cast iron, or with devices for forming parts which are not dies for forming tubes, the invention will be described below, for the sake of clarity and simplicity, in the context of a vertical ascending continuous casting installation of cast iron tubes, obtained using a die.
  • the supply device 1 mainly comprises a siphon 3, means for heating the siphon 3 in the form of heating plates 16 arranged all around the siphon except at its inlet and outlet, a carcass 17 provided with an inductor 18, in which the siphon 3 and the heating plates 16 are placed, and finally, a filling, insulation and protection material 19 disposed in the space left free between the stack formed by the siphon 3 and the heating plates 16, and the carcass 17.
  • the siphon 3 is shown in more detail in Figures 4 and 5. It is a substantially U-shaped part molded from a low-cost refractory material, in particular refractory concrete.
  • the siphon 3 comprises a part 3A with a square section provided with a vertical downward channel 20 entering the molten iron, a part 3B with a square section provided with a channel horizontal 21 into which opens a second vertical channel 22 directed upwards, much shorter than channel 20, communicating with channel 21 and having a frustoconical part 3C; this part 3C ensures the tight centering of the conjugate lower part 10A of the heating base 10 of the die ( Figure 2). It should be noted that part 3B extends a little beyond part 3A, which defines a horizontal shoulder 23.
  • This siphon 3 being obtained by molding with a core, the two end holes 24 of the horizontal channel 21 which are produced by molding and capped with refractory earth that has been groomed manually.
  • the siphon 3 consequently comprises an inlet orifice 25 and an outlet orifice 26 of the cast iron.
  • provision may be made for the insertion of instruments for measuring the temperature of the cast iron inside the siphon, in the form of a thermocouple placed in an alumina sheath (not shown), the assembly being inserted into the hole before filling.
  • This siphon molded in refractory concrete makes it an extremely economical part, of consumable nature, intended to be replaced after each casting campaign.
  • the funnel ( Figure 2): Intended to be positioned above the inlet orifice 25 of the siphon, this funnel 5 has a conical internal shape, the lower part of which opens into the vertical channel 20, of the same diameter, d entry of liquid iron into the siphon.
  • the funnel 5 is also molded from refractory concrete, preferably identical to that of the siphon. In order to ensure sealing between the funnel 5 and the siphon 3, the funnel is bonded to the siphon with a refractory cement.
  • the funnel 5 is a consumable and economical part, intended to be replaced at the end of one or more of several casting campaigns.
  • the funnel 5 is surmounted by a funnel-channel 26 of refractory cement, not consumable, having a larger opening for the reception of the poured cast iron.
  • the hot plates ( Figure 3):
  • the supply device 1 also includes a set of hot plates 16, intended to maintain the liquid iron temperature, by conduction through the material of the siphon.
  • These heating plates also called suscep- tors, which can themselves be heated by induction
  • the invention provides for example graphite plates with a thickness of the order of 30 mm, placed directly in contact with the refractory material of the trap so as to enclose it with lower, upper, and side plates, as shown in Figure 3, with the exception of the inlet 25 and outlet 26 of the siphon.
  • the graphite on the plates 16 makes it possible to preheat the siphon 3 by induction, in a homogeneous and controllable manner, up to temperatures of the order of 1000 ° C.
  • a base plate 16A is used under the siphon 3, projecting laterally on each side of the part 3B, two vertical side plates 16B attached to the part 3B and placed on the edges of the plate 16A, an upper plate 16C placed on the part 3B, and four vertical plates 16D adjoining the part 3A of the siphon and placed respectively on the plate 16C, on the shoulder 23 and on the upper edge of the plates 16B.
  • Insulating material Figure 2: The stack formed by the graphite susceptor plates 16, the siphon 3 and the funnel 5 is disposed on an alignment of refractory bricks 27.
  • a carcass 17 made of refractory material is: disposed around this stack, so as to leave a space 28 between the stack and the carcass 17.
  • inductor windings 18 are embedded in the thickness of the carcass 17, and supplied with electric current only from an external generator, not shown.
  • the carcass comprises a main part 17A which surrounds the part 3B of the siphon and protrudes above it, and an extension 17B which surrounds the upper part of the part 3A and protrudes above it.
  • the space 28 between the carcass 17 and the encirclement formed by the siphon 3 and the heating plates 16 is filled with a filling material 19 providing a function of thermal insulation and chemical protection of the heating elements against oxidation.
  • the space 28 is preferably filled with fine foundry sand, simply poured between the carcass 17 of the inductor and the siphon 3 equipped with the plates 16. The sand flows into the space 28, which '' it fills perfectly, completely enclosing the graphite heating plates 16 and the siphon 3 for optimal protection of the supply device 1. This sand, which does not hinder the removal of the carcass 17 during disassembly of the supply device 1, can be recovered and recycled after each casting campaign.
  • ALL LOCATION (RULE auxiliary 30 is arranged around the base of the die 2.
  • the use of the cast iron supply device 1 according to the invention takes place in the following manner.
  • a support which can be a lifting table 31
  • the bricks 27 are placed then the lower heating plate 16A.
  • the siphon 3 of refractory concrete On this lower plate is placed the siphon 3 of refractory concrete, then the stacking and positioning of the remaining plates 16 is completed as shown in Figure 3.
  • the various heating plates are encircled by a retaining means, in particular an adhesive tape.
  • the bricks 29 are placed, and the carcass 17 provided with its inductor means 18 intended for preheating the siphon 3 via the heating plates, is brought, typically using a traveling crane.
  • the carcass 17 is filled with sand 19 so that all the parts possibly made of graphite are covered.
  • the inductor 30 is put in place, and the funnel 5 is bonded above the inlet orifice 25 of the siphon 3, and the die 2 is bonded to the part 3C thereof, at using refractory cement.
  • the preheating inductor 18 is connected to its electrical supply box (not shown) and the preheating of the supply device 1 is started.
  • the hot plates playing the role armature heat up, and in turn heat the siphon 3, while remaining thermally insulated and against oxidation by sand 19 and bricks 29.
  • Preheating the device can take one to three hours, depending on the power of the inductor circuit.
  • the preparation of the feeding device 1 before casting will advantageously be full by the blackening of the various zones of passage of the liquid cast iron, in order to avoid a sticking of drops and tongues of solid cast iron during the casting.
  • the supply of liquid iron to the base of the die by means of the feed device 1 according to the invention can start.
  • the continuous upward casting of cast iron tubes will then take place in a conventional manner.
  • the supply device 1 according to the invention is dismantled by successively removing the funnel 5 and the funnel-channel 26, the bricks 29, the breakage 17, the sand 19, the plates 16 and the siphon 3. The latter will be eliminated and replaced by a new siphon.
  • the supply device 1 according to the invention responds perfectly to the objectives set.
  • the invention can also be applied to the casting of solid bodies, such as bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Feeding Of Articles To Conveyors (AREA)

Abstract

PCT No. PCT/FR94/00570 Sec. 371 Date Apr. 4, 1996 Sec. 102(e) Date Apr. 4, 1996 PCT Filed May 11, 1994 PCT Pub. No. WO94/26444 PCT Pub. Date Nov. 24, 1994The molten-metal feed device (1), arranged between a source of molten metal and a casting machine for the ascending continuous casting of cast-iron pipes, has a modular structure (3, 16). This structure includes a syphon (3) for conveying the molten metal from the source of metal to the casting machine, constituting a replaceable component, and plates (16) for heating the syphon (3) which are removably arranged around the latter and in contact with it.

Description

Dispositif d'alimentation en métal en fusion, notamment en fonte, d'une machine de coulée, et Installation de coulée intégrant ce dispositif d'alimentation. Device for supplying molten metal, in particular cast iron, to a casting machine, and Casting installation incorporating this supply device.
La présente invention est relative à la coulée des métaux en fusion, et plus particulièrement à la coulée continue verticale de pièces métalliques, no¬ tamment de tubes en fonte. Bien qu'elle s'applique à la coulée de différents types de pièces métalliques, elle est particulièrement avantageuse pour la coulée de tubes minces en fonte. L'expression "tube mince" s'applique à un tube dont le rapport épaisseur/diamètre est faible, inférieur à dix pour cent, plutôt qu'à 1'épaisseur considérée isolément en soi.The present invention relates to the casting of molten metals, and more particularly to the continuous vertical casting of metal parts, in particular cast iron tubes. Although it applies to the casting of different types of metal parts, it is particularly advantageous for the casting of thin cast iron tubes. The expression "thin tube" applies to a tube whose thickness / diameter ratio is small, less than ten percent, rather than the thickness considered in itself.
L'invention concerne plus précisément un dispositif d'alimentation en métal en fusion d'une machine de coulée, notamment pour une installation de coulée continue verticale ascendante de tubes en fonte, ledit dispositif d'alimentation étant disposé entre une source de métal en fusion et la machine de coulée. La source de métal en fusion est typiquement une poche de coulée de fonte et la machine de coulée une machine de coulée continue ascendante de pièces métalliques, du type à filière verticale. L'invention concerne donc un maillon intermédiaire d'une installation de coulée disposé entre la source de métal en fusion et le dispositif de coulée de pièces métalliques en tant que tel.The invention relates more precisely to a device for supplying molten metal to a casting machine, in particular for an installation for continuous vertical upward casting of cast iron tubes, said supply device being disposed between a source of molten metal. and the casting machine. The source of molten metal is typically a cast iron ladle and the casting machine an upward continuous casting machine for metal parts, of the vertical die type. The invention therefore relates to an intermediate link of a casting installation arranged between the source of molten metal and the device for casting metal parts as such.
Le document FR-A-2 547 517 relatif à une installation de coulée continue verticale à filière à entrée chaude pour la coulée de tubes métalliques a déjà décrit un dispositif d'alimentation en fonte liquide, disposé entre une poche de coulée et une filière ver¬ ticale. Ce dispositif d'alimentation comporte un bloc siphon constitué d'une pièce d'un seul tenant réalisée dans un matériau "réfractaire du type silico-alumineux ou en graphite. Ce bloc siphon comporte une cheminée verticale surmontée d'un entonnoir de réception de la fonte et un chenal de coulée horizontal raccordé de manière étanche à l'extrémité inférieure de la filière à laquelle il sert de socle ou de support.The document FR-A-2,547,517 relating to a vertical continuous casting installation with a hot inlet die for the casting of metal tubes has already described a device for supplying liquid iron, placed between a ladle and a worm die. ¬ tical. This supply device comprises a siphon block consisting of a single piece made of a " refractory material of the silico-aluminous type or of graphite. This siphon block comprises a vertical chimney surmounted by a funnel for receiving the cast iron and a horizontal runner tightly connected to the lower end of the die to which it serves as a base or support.
Ce bloc siphon selon l'état de la technique pose un certain nombre de problèmes. En effet, compte tenu des hautes températures mises en jeu dans la coulée de métaux en fusion, le bloc siphon est rapidement endommagé pendant le processus de coulée continue. En particulier, un siphon en graphite, outre son coût relativement élevé, est progressivement usé et/ou consommé par la fonte en fusion qui est en contact avec lui. En outre, un bloc siphon d'un seul tenant est une pièce relativement massive d'une mise en oeuvre diffici¬ le, ce qui complique également la manutention nécessaire lors du remplacement du siphon. La consommation du graphite peut provoquer une modification de la composi¬ tion de la fonte, en dehors de l'analyse souhaitée.This siphon block according to the state of the art poses a certain number of problems. Indeed, given the high temperatures involved in the casting of molten metals, the siphon block is quickly damaged during the continuous casting process. In particular, a graphite siphon, in addition to its relatively high cost, is gradually worn and / or consumed by the molten iron which is in contact with it. In addition, a siphon block in one piece is a relatively massive part of a diffici¬ le implementation, which also complicates the handling required when replacing the siphon. The consumption of graphite can cause a change in the composition of the cast iron, outside of the desired analysis.
Le but de la présente invention est de remédier aux inconvénients présentés par les dispositifs connus d'alimentation en métal en fusion, et en particu¬ lier par les blocs siphons tels que connus dans l'état de la technique.The object of the present invention is to remedy the drawbacks presented by known devices for supplying molten metal, and in particular to be connected by siphon blocks as known in the prior art.
L'invention a par conséquent pour objet un dispositif d'alimentation en métal en fusion d'une machine de coulée, notamment pour une installation de coulée continue verticale ascendante de tubes en fonte, ledit dispositif d'alimentation étant disposé entre une source de métal en fusion et la machine de coulée, ce dispositif étant caractérisé en ce qu'il présente une structure modulaire comportant d'une part un siphon d'amenée du métal en fusion de la source de métal vers la machine de coulée, et d'autre part des plaques amovi¬ bles de chauffage du siphon, disposées autour de celui-ci et en contact avec lui. Selon d'autres caractéristiques de l'inven- tion :The subject of the invention is therefore a device for supplying molten metal to a casting machine, in particular for an installation of continuous vertical upward casting of cast iron tubes, said supply device being arranged between a source of metal. in fusion and the casting machine, this device being characterized in that it has a modular structure comprising on the one hand a siphon for supplying molten metal from the metal source to the casting machine, and on the other part of the removable heating plates of the siphon, arranged around the latter and in contact with it. According to other characteristics of the invention tion:
- le siphon est une pièce interchangeable, notamment réalisée en béton réfractaire moulé;- the siphon is an interchangeable part, in particular made of molded refractory concrete;
- le siphon est une pièce ayant sensiblement une forme de U, comportant un premier canal sensiblement vertical terminé vers le haut par un orifice d'entrée du métal en fusion, un second canal sensiblement vertical débouchant à la base de la machine de coulée par un orifice de sortie du métal en fusion, et un canal sensiblement horizontal reliant les canaux verticaux entre eux;- the siphon is a part having a substantially U shape, comprising a first substantially vertical channel terminated upwards by an inlet for molten metal, a second substantially vertical channel opening at the base of the casting machine by a outlet for molten metal, and a substantially horizontal channel connecting the vertical channels together;
- la pièce présente autour du second canal une forme tronconique destinée à coopérer à joint étanche avec la base conjuguée ce la machine de coulée; - le dispositif comporte en outre une carcasse en matériau réfractaire, entourant le siphon et les plaques de chauffage de manière à laisser libre un espace entre 1'intérieur de la carcasse et les plaques de chauffage, ledit espace étant comblé avec un matériau isolant thermique et protecteur chimique, ;- The part has around the second channel a frustoconical shape intended to cooperate with a tight seal with the conjugate base of the casting machine; the device further comprises a carcass of refractory material, surrounding the siphon and the heating plates so as to leave a space between the interior of the carcass and the heating plates, said space being filled with a thermal insulating material and chemical protector,;
- la carcasse comporte des moyens de chauf¬ fage des plaques de chauffage, notamment constitués par un circuit inducteur noyé dans la carcasse, les plaques de chauffage faisant office d'induit; - le matériau isolant thermique et protecteur chimique est du sable fin de fonderie;- The carcass comprises means for heating the heating plates, in particular constituted by an inductor circuit embedded in the carcass, the heating plates acting as armature; - the thermal insulating and chemical protective material is fine foundry sand;
- les plaques de chauffage sont en graphite;- the heating plates are made of graphite;
- 1'empilement du siphon et des plaques de chauffage entourant le siphon est disposé sur des briques réfractaires;- the stack of the siphon and of the heating plates surrounding the siphon is placed on refractory bricks;
- le siphon comporte des faces planes d'appui de chaque plaque de chauffage.- the siphon has flat support faces of each heating plate.
L'invention a également pour objet une installation de coulée de pièces métalliques, notamment de coulée continue verticale ascendante de tubes en fonte, caractérisée en ce qu'elle comporte un dispositif d'alimentation de métal en fusion tel que défini plus haut.The invention also relates to an installation for casting metal parts, in particular for vertical upward continuous casting of tubes in cast iron, characterized in that it comprises a device for supplying molten metal as defined above.
Un mode de réalisation préféré de l'invention va être décrit plus en détail ci-dessous en se référant aux dessins annexés, donnés uniquement à titre d'exemple et sur lesquels :A preferred embodiment of the invention will be described in more detail below with reference to the accompanying drawings, given solely by way of example and in which:
- la Figure 1 est une vue en élévation et en coupe d'un dispositif d'alimentation en fonte en fusion selon l'état de la technique, relié à une filière pour la coulée en continu de tubes en fonte;- Figure 1 is an elevational and sectional view of a device for supplying molten iron according to the prior art, connected to a die for the continuous casting of cast iron tubes;
- la Figure 2 est une vue en élévation et en coupe du dispositif d'alimentation en métal en fusion selon l'invention; - la Figure 3 est une vue en perspective éclatée de suscepteurs en graphite utilisés dans le dispositif d'alimentation selon l'invention;- Figure 2 is an elevational and sectional view of the molten metal supply device according to the invention; - Figure 3 is an exploded perspective view of graphite susceptors used in the supply device according to the invention;
- la Figure 4 est une vue en élévation et en coupe d'un siphon en béton réfractaire utilisé dans le dispositif d'alimentation selon l'invention;- Figure 4 is an elevational and sectional view of a refractory concrete siphon used in the supply device according to the invention;
- la Figure 5 est une vue de dessus du siphon de la Figure 4;- Figure 5 is a top view of the siphon of Figure 4;
- la Figure 6 est une vue en coupe et en perspective du dispositif d'alimentation en métal en fusion selon l'invention.- Figure 6 is a sectional and perspective view of the molten metal supply device according to the invention.
On se réfère à la Figure 1.We refer to Figure 1.
Dans cette Figure est représenté un dispo¬ sitif connu d'alimentation 1 en fonte en fusion, pour l'alimentation d'une filière 2 destinée au formage de tu- bes en fonte T par coulée continue ascendante, suivant le document FR-A-2547517. Le dispositif d'alimentation 1 à proprement parler se compose d'un bloc siphon 3 sensiblement en forme de L. Ce bloc siphon 3 est es¬ sentiellement réalisé d'un seul tenant dans un matériau réfractaire du type silico-alumineux ou en graphite. Le bloc siphon 3 comporte une cheminée d'alimentation 4 terminée à sa partie haute par un évasement 5 en forme d'entonnoir. La partie horizontale 6 du bloc siphon intègre un chenal de coulée 7 horizontal débouchant d'un côté dans la cheminée d'alimentation 4, et de l'autre côté dans une portion de canal 8 verticale ascendante terminée par un évasement tronconique 9 débouchant dans la partie inférieure 10 de la filière. La filière se compose essentiellement d'un tube cylindrique 11 en graphite, entouré à sa partie inférieure 10 d'un anneau réfractaire 12 dans lequel sont noyés les câbles 13 d'un circuit inducteur destiné à maintenir le métal liquide au-dessus de son point de fusion. La filière 2 est entourée dans sa partie supérieure 14 d'un circuit de refroidissement 15 qui permet une solidification gra¬ duelle de la fonte en fusion pour la formation de tubes. Pendant le fonctionnement du dispositif d'alimentation 1, une poche de coulée P constitue la source de fonte en fusion pour le dispositif d'alimentation 1, qui à son tour alimente la filière 2.In this figure is shown a known device for supplying 1 of molten cast iron, for supplying a die 2 intended for forming tubes of cast iron T by continuous upward casting, according to document FR-A- 2547517. The supply device 1 strictly speaking consists of a siphon block 3 substantially in the shape of an L. This siphon block 3 is es¬ sentially made in one piece in a refractory material of the silico-aluminous type or in graphite. The siphon block 3 includes a supply chimney 4 terminated at its upper part by a flare 5 in the form of a funnel. The horizontal part 6 of the siphon block incorporates a horizontal pouring channel 7 opening on one side into the supply chimney 4, and on the other side in a portion of vertical ascending channel 8 ending in a frustoconical flare 9 opening into the lower part 10 of the die. The die essentially consists of a cylindrical tube 11 made of graphite, surrounded at its lower part 10 by a refractory ring 12 in which are embedded the cables 13 of an inductor circuit intended to keep the liquid metal above its point of fusion. The die 2 is surrounded in its upper part 14 by a cooling circuit 15 which allows a gradual solidification of the molten iron for the formation of tubes. During the operation of the feed device 1, a ladle P constitutes the source of molten cast iron for the feed device 1, which in turn feeds the die 2.
Le bloc siphon 3 de ce dispositif d'alimen¬ tation 1 est l'élément qui pose les problèmes que la présente invention se propose de résoudre. En effet, ce bloc d'un seul tenant est d'une manipulation et d'une installation malaisées, et d'un coût élevé, notamment lorsqu'il est réalisé en graphite. De plus, il se détériore progressivement au cours de la coulée par usure ou consommation sous l'action de la fonte en fusion. En conséquence, dans ce dispositif d'alimentation 1 selon l'état de la technique, le bloc siphon 3 doit être remplacé dans son intégralité dès qu'un certain nombre de tubes ont été coulés.The siphon block 3 of this supply device 1 is the element which poses the problems which the present invention proposes to solve. Indeed, this block in one piece is difficult to handle and install, and a high cost, especially when made of graphite. In addition, it gradually deteriorates during casting by wear or consumption under the action of molten iron. Consequently, in this supply device 1 according to the state of the art, the siphon block 3 must be replaced in its entirety as soon as a certain number of tubes have been poured.
On se réfère à la Figure 2.We refer to Figure 2.
Cette Figure illustre un dispositif d'ali- mentation 1 en métal en fusion selon l'invention. L'invention sera décrite dans le cadre d'un dispositif de coulée en continu de tubes en fonte semblable au dispositif de la Figure 1, alimentant une filière 2, mais uniquement à titre d'exemple. Dans son principe, l'invention propose un dispositif d'alimentation modulaire, dont une pièce maîtresse est un siphon interchangeable et de très faible coût. Bien que l'invention puisse être mise en oeuvre dans le cadre d'installations de coulée utilisant d'autres métaux que la fonte, ou avec des dispositifs de formage de pièces qui ne sont pas des filières pour la formation de tubes, l'invention sera décrite ci-après, à des fins de clarté et de simplicité, dans le cadre d'une installation de coulée verticale ascendante en continu de tubes en fonte, obtenus à l'aide d'une filière.This figure illustrates a supply device 1 made of molten metal according to the invention. The invention will be described in the context of a continuous casting device for cast iron tubes similar to the device in FIG. 1, supplying a die 2, but only by way of example. In principle, the invention provides a modular supply device, a centerpiece of which is an interchangeable siphon and of very low cost. Although the invention can be implemented in the context of casting installations using metals other than cast iron, or with devices for forming parts which are not dies for forming tubes, the invention will be described below, for the sake of clarity and simplicity, in the context of a vertical ascending continuous casting installation of cast iron tubes, obtained using a die.
Le dispositif d'alimentation 1 selon l'in¬ vention comporte principalement un siphon 3, des moyens de chauffage du siphon 3 sous la forme de plaques chauf- fantes 16 disposées tout autour du siphon sauf au niveau de son entrée et de sa sortie, une carcasse 17 pourvue d'un inducteur 18, dans laquelle sont placés le siphon 3 et les plaques chauffantes 16, et enfin, un matériau de remplissage, d'isolation et de protection 19 disposé dans l'espace laissé libre entre l'empilement constitué par le siphon 3 et les plaques chauffantes 16, et la carcasse 17.The supply device 1 according to the invention mainly comprises a siphon 3, means for heating the siphon 3 in the form of heating plates 16 arranged all around the siphon except at its inlet and outlet, a carcass 17 provided with an inductor 18, in which the siphon 3 and the heating plates 16 are placed, and finally, a filling, insulation and protection material 19 disposed in the space left free between the stack formed by the siphon 3 and the heating plates 16, and the carcass 17.
Le siphon (Figures 4 et 5) :The siphon (Figures 4 and 5):
Le siphon 3 est représenté plus en détail aux Figures 4 et 5. Il s'agit d'une pièce sensiblement en forme de U moulée dans un matériau réfractaire de faible coût, notamment du béton réfractaire. Le siphon 3 comporte une partie 3A à section carrée pourvue d'un canal vertical descendant 20 d'entrée de la fonte en fusion, une partie 3B à section carrée pourvue d'un canal horizontal 21 dans lequel débouche un second canal vertical 22 dirigé vers le haut, beaucoup plus court que le canal 20, communiquant avec le canal 21 et présentant une partie tronconique 3C; cette partie 3C assure le centrage étanche de la partie inférieure conjuguée 10A de la base chauffante 10 de la filière (Figure 2). Il est à noter que la partie 3B se prolonge un peu au-delà de la partie 3A, ce qui définit un épaulement horizontal 23. Ce siphon 3 étant obtenu par moulage avec noyau, les deux trous d'extrémité 24 du canal horizontal 21 qui sont issus du moulage sont bouchés à l'aide d'une terre réfractaire damée manuellement. Le siphon 3 comporte en conséquence un orifice 25 d'entrée, et un orifice de sortie 26 de la fonte. Lors du rebouchage des trous superflus 24, l'on pourra prévoir l'insertion d'instruments de mesure de la température de la fonte a l'intérieur du siphon, sous la forme d'un thermocouple disposé dans une gaine d'alumine (non représentés), l'ensemble étant inséré dans le trou avant rebouchage. La simplicité de ce siphon moulé en béton réfractaire en fait une pièce extrêmement économique, à caractère consommable, destiné à être remplacé après chaque campagne de coulée.The siphon 3 is shown in more detail in Figures 4 and 5. It is a substantially U-shaped part molded from a low-cost refractory material, in particular refractory concrete. The siphon 3 comprises a part 3A with a square section provided with a vertical downward channel 20 entering the molten iron, a part 3B with a square section provided with a channel horizontal 21 into which opens a second vertical channel 22 directed upwards, much shorter than channel 20, communicating with channel 21 and having a frustoconical part 3C; this part 3C ensures the tight centering of the conjugate lower part 10A of the heating base 10 of the die (Figure 2). It should be noted that part 3B extends a little beyond part 3A, which defines a horizontal shoulder 23. This siphon 3 being obtained by molding with a core, the two end holes 24 of the horizontal channel 21 which are produced by molding and capped with refractory earth that has been groomed manually. The siphon 3 consequently comprises an inlet orifice 25 and an outlet orifice 26 of the cast iron. When filling the superfluous holes 24, provision may be made for the insertion of instruments for measuring the temperature of the cast iron inside the siphon, in the form of a thermocouple placed in an alumina sheath (not shown), the assembly being inserted into the hole before filling. The simplicity of this siphon molded in refractory concrete makes it an extremely economical part, of consumable nature, intended to be replaced after each casting campaign.
L'entonnoir (Figure 2) : Destiné à être positionné au-dessus de l'orifice d'entrée 25 du siphon, cet entonnoir 5 possède une forme interne conique dont la partie inférieure débouche dans le canal vertical 20, de même diamètre, d'entrée de la fonte liquide dans le siphon. L'entonnoir 5 est également moulé en béton réfractaire, de préférence identique à celui du siphon. Afin d'assurer l'étanchéité entre l'entonnoir 5 et le siphon 3, l'entonnoir est collé sur le siphon avec un ciment réfractaire. Comme le siphon, l'entonnoir 5 est une pièce consommable et économique, destinée à être remplacée à la fin d'une ou de plusieurs campagnes de coulée. Afin de permettre le versement de la fonte sans débordement ou éclaboussure, l'entonnoir 5 est surmonté par un entonnoir-canal 26 en ciment réfractaire, non consommable, présentant une ouverture plus grande pour la réception de la fonte versée.The funnel (Figure 2): Intended to be positioned above the inlet orifice 25 of the siphon, this funnel 5 has a conical internal shape, the lower part of which opens into the vertical channel 20, of the same diameter, d entry of liquid iron into the siphon. The funnel 5 is also molded from refractory concrete, preferably identical to that of the siphon. In order to ensure sealing between the funnel 5 and the siphon 3, the funnel is bonded to the siphon with a refractory cement. Like the siphon, the funnel 5 is a consumable and economical part, intended to be replaced at the end of one or more of several casting campaigns. In order to allow the pouring of the cast iron without overflow or splashing, the funnel 5 is surmounted by a funnel-channel 26 of refractory cement, not consumable, having a larger opening for the reception of the poured cast iron.
Les plaques chauffantes (Figure 3) : Le dispositif d'alimentation 1 selon l'in¬ vention comprend également un ensemble de plaques chauffantes 16, destinées à maintenir la fonte liquide en température, par conduction à travers le matériau du siphon. Ces plaques chauffantes, encore appelées suscep- teurs, pouvant elles-mêmes être chauffées par induction, 1'invention prévoit des plaques par exemple en graphite d'une épaisseur de l'ordre de 30 mm, placées directement au contact avec le matériau réfractaire du siphon de façon à enfermer celui-ci avec des plaques inférieures, supérieures, et latérales, comme représenté dans la Figure 3, à l'exception des orifices d'entrée 25 et de sortie 26 du siphon. Utilisé comme suscepteur, le graphite des plaques 16 permet de préchauffer le siphon 3 par induction, de façon homogène et contrôlable, jusqu'à des températures de l'ordre de 1000'C.The hot plates (Figure 3): The supply device 1 according to the invention also includes a set of hot plates 16, intended to maintain the liquid iron temperature, by conduction through the material of the siphon. These heating plates, also called suscep- tors, which can themselves be heated by induction, the invention provides for example graphite plates with a thickness of the order of 30 mm, placed directly in contact with the refractory material of the trap so as to enclose it with lower, upper, and side plates, as shown in Figure 3, with the exception of the inlet 25 and outlet 26 of the siphon. Used as a susceptor, the graphite on the plates 16 makes it possible to preheat the siphon 3 by induction, in a homogeneous and controllable manner, up to temperatures of the order of 1000 ° C.
Dans l'exemple de la Figure 3, on utilise une plaque de base 16A sous le siphon 3, dépassant latérale¬ ment de chaque côté de la partie 3B, deux plaques latérales verticales 16B accolées à la partie 3B et posées sur les bords de la plaque 16A, une plaque supérieure 16C posée sur la partie 3B, et quatre plaques verticales 16D accolées à la partie 3A du siphon et posées respectivement sur la plaque 16C, sur l'épaulement 23 et sur la tranche supérieure des plaques 16B. Matériau isolant (Figure 2) : L'empilement formé par les plaques 16 de suscepteur en graphite, le siphon 3 et l'entonnoir 5 est disposé sur un alignement de briques réfractaires 27. Une carcasse 17 en matériau réfractaire est: disposée autour de cet empilement, de façon à laisser libre un espace 28 entre l'empilement et la carcasse 17. De façon connue, des enroulements inducteurs 18 sont noyés dans l'épais¬ seur de la carcasse 17, et alimentés en courant électri¬ que à partir d'un générateur extérieur non représenté. La carcasse comprend une partie principale 17A qui entoure la partie 3B du siphon et dépasse au-dessus de celle-ci, et un prolongement 17B qui entoure la partie supérieure de la partie 3A et dépasse au-dessus de celle- ci.In the example of FIG. 3, a base plate 16A is used under the siphon 3, projecting laterally on each side of the part 3B, two vertical side plates 16B attached to the part 3B and placed on the edges of the plate 16A, an upper plate 16C placed on the part 3B, and four vertical plates 16D adjoining the part 3A of the siphon and placed respectively on the plate 16C, on the shoulder 23 and on the upper edge of the plates 16B. Insulating material (Figure 2): The stack formed by the graphite susceptor plates 16, the siphon 3 and the funnel 5 is disposed on an alignment of refractory bricks 27. A carcass 17 made of refractory material is: disposed around this stack, so as to leave a space 28 between the stack and the carcass 17. In known manner, inductor windings 18 are embedded in the thickness of the carcass 17, and supplied with electric current only from an external generator, not shown. The carcass comprises a main part 17A which surrounds the part 3B of the siphon and protrudes above it, and an extension 17B which surrounds the upper part of the part 3A and protrudes above it.
L'espace 28 entre la carcasse 17 et l'empi¬ lement constitué par le siphon 3 et les plaques chauf- fantes 16 est comblé par un matériau de remplissage 19 assurant une fonction d'isolation thermique et de protection chimique des éléments de chauffage contre l'oxydation. En effet, lorsque les plaques 16 en graphite sont portées à haute température sous l'effet des phénomènes d'induction, elles ont tendance à s'oxyder et à se détériorer. Afin d'éviter ceci, l'espace 28 est rempli de préférence avec du sable fin de fonderie, simplement versé entre la carcasse 17 de l'inducteur et le siphon 3 équipé des plaques 16. Le sable coule dans l'espace 28, qu'il remplit parfaitement, enfermant totalement les plaques chauffantes 16 en graphite et le siphon 3 pour une protection optimale du dispositif d'alimentation 1. Ce sable, qui ne gêne nullement l'enlèvement de la carcasse 17 lors du démontage du dispositif d'alimentation 1, peut être récupéré et recyclé après chaque campagne de coulée.The space 28 between the carcass 17 and the encirclement formed by the siphon 3 and the heating plates 16 is filled with a filling material 19 providing a function of thermal insulation and chemical protection of the heating elements against oxidation. In fact, when the graphite plates 16 are brought to high temperature under the effect of induction phenomena, they tend to oxidize and deteriorate. In order to avoid this, the space 28 is preferably filled with fine foundry sand, simply poured between the carcass 17 of the inductor and the siphon 3 equipped with the plates 16. The sand flows into the space 28, which '' it fills perfectly, completely enclosing the graphite heating plates 16 and the siphon 3 for optimal protection of the supply device 1. This sand, which does not hinder the removal of the carcass 17 during disassembly of the supply device 1, can be recovered and recycled after each casting campaign.
Comme on le voit sur la Figure 2, des briques réfractaires 29 d'isolation et de retenue du sable sont disposées sur la plaque 16C et s'insèrent sous le prolongement 17B de la carcasse 17. De plus, un inducteurAs seen in FIG. 2, refractory bricks 29 for insulating and retaining the sand are placed on the plate 16C and are inserted under the extension 17B of the carcass 17. In addition, an inductor
TOUSDEREMPLACEMENT(REGLE auxiliaire 30 est disposé autour de la base de la filière 2.ALL LOCATION (RULE auxiliary 30 is arranged around the base of the die 2.
L'utilisation du dispositif d'alimentation 1 en fonte selon l'invention a lieu de la manière suivante. Sur un support qui peut être une table élévatrice 31, l'on pose les briques 27 puis la plaque chauffante infé¬ rieure 16A. Sur cette plaque inférieure est posé le siphon 3 en béton réfractaire, puis l'empilement et le positionnement des plaques 16 restantes est terminé tel que représenté à la Figure 3. Afin d'éviter un dépla¬ cement entre elles, les différentes plaques chauffantes sont cerclées par un moyen de retenue, notamment un ruban adhésif. Ensuite, on pose les briques 29, et la carcasse 17 pourvue de ses moyens inducteurs 18 destinés au pré- chauffage du siphon 3 par l'intermédiaire des plaques chauffantes, est amenée, typiquement à l'aide d'un pont roulant. Elle est disposée de façon centrée autour du siphon 3, puis la carcasse 17 est remplie de sable 19 de sorte que toutes les parties éventuellement en graphite soient recouvertes. Puis l'inducteur 30 est mis en place, et l'entonnoir 5 est collé au-dessus de l'orifice d'en¬ trée 25 du siphon 3, et la filière 2 est collée sur la partie 3C de celui-ci, à l'aide de ciment réfractaire. On complète alors le remplissage de sable si nécessaire. Puis l'on relie l'inducteur de préchauffage 18 à son coffret d'alimentation électrique (non représenté) et l'on met en route le préchauffage du dispositif d'alimen¬ tation 1. De ce fait, les plaques chauffantes jouant le rôle d'induit montent en température, et chauffent à leur tour le siphon 3, tout en restant isolées thermiquement et contre l'oxydation par le sable 19 et les briques 29. Le préchauffage du dispositif peut prendre une à trois heures, en fonction de la puissance du circuit inducteur. La préparation du dispositif d'ali- mentation 1 avant la coulée sera avantageusement corn- plétée par le noircissement des différentes zones de passage de la fonte liquide, afin d'éviter un collage de gouttes et de languettes de fonte solide pendant la coulée. Lorsque le préchauffage est terminé et qu'une poche de coulée P remplie de fonte en fusion est disponi¬ ble, l'amenée de la fonte liquide à la base de la filière par l'intermédiaire du dispositif d'alimentation 1 selon 1'invention peut commencer. La coulée continue ascendante de tubes en fonte aura alors lieu de façon classique.The use of the cast iron supply device 1 according to the invention takes place in the following manner. On a support which can be a lifting table 31, the bricks 27 are placed then the lower heating plate 16A. On this lower plate is placed the siphon 3 of refractory concrete, then the stacking and positioning of the remaining plates 16 is completed as shown in Figure 3. In order to avoid displacement between them, the various heating plates are encircled by a retaining means, in particular an adhesive tape. Then, the bricks 29 are placed, and the carcass 17 provided with its inductor means 18 intended for preheating the siphon 3 via the heating plates, is brought, typically using a traveling crane. It is arranged centered around the siphon 3, then the carcass 17 is filled with sand 19 so that all the parts possibly made of graphite are covered. Then the inductor 30 is put in place, and the funnel 5 is bonded above the inlet orifice 25 of the siphon 3, and the die 2 is bonded to the part 3C thereof, at using refractory cement. We then complete the sand filling if necessary. Then the preheating inductor 18 is connected to its electrical supply box (not shown) and the preheating of the supply device 1 is started. As a result, the hot plates playing the role armature heat up, and in turn heat the siphon 3, while remaining thermally insulated and against oxidation by sand 19 and bricks 29. Preheating the device can take one to three hours, depending on the power of the inductor circuit. The preparation of the feeding device 1 before casting will advantageously be full by the blackening of the various zones of passage of the liquid cast iron, in order to avoid a sticking of drops and tongues of solid cast iron during the casting. When the preheating is finished and a ladle P filled with molten iron is available, the supply of liquid iron to the base of the die by means of the feed device 1 according to the invention can start. The continuous upward casting of cast iron tubes will then take place in a conventional manner.
A la fin de la campagne de coulée, la fonte restant dans le canal 21 du siphon se solidifie. On démonte le dispositif d'alimentation 1 selon l'invention en procédant successivement à 1'enlèvement de 1'entonnoir 5 et de l'entonnoir-canal 26, des briques 29, de la car¬ casse 17, du sable 19, des plaques chauffantes 16 et du siphon 3. Ce dernier sera éliminé et remplacé par un nouveau siphon. On procédera alors à la reconstruction du dispositif d'alimentation 1 selon l'invention, pour une prochaine campagne de coulée. De ce fait, le disposi¬ tif d'alimentation 1 selon l'invention répond parfaite¬ ment aux objectifs fixés. En proposant une structure modulaire comprenant un siphon interchangeable et de faible coût, ce dispositif améliore à la fois le coût de production de pièces métalliques coulées, et la manuten¬ tion requise par le dispositif.At the end of the casting campaign, the cast iron remaining in channel 21 of the siphon solidifies. The supply device 1 according to the invention is dismantled by successively removing the funnel 5 and the funnel-channel 26, the bricks 29, the breakage 17, the sand 19, the plates 16 and the siphon 3. The latter will be eliminated and replaced by a new siphon. We will then proceed to the reconstruction of the supply device 1 according to the invention, for a next casting campaign. As a result, the supply device 1 according to the invention responds perfectly to the objectives set. By proposing a modular structure comprising an interchangeable siphon and of low cost, this device improves both the cost of producing cast metal parts, and the handling required by the device.
L'invention peut être également appliquée à la coulée de corps pleins, tels que des barres. The invention can also be applied to the casting of solid bodies, such as bars.

Claims

REVENDICATIONS
1. Dispositif d'alimentation (1) en métal en fusion d'une machine de coulée (2), notamment pour une installation de coulée continue verticale ascendante de pièces, en particulier de tubes, en fonte, ledit disposi¬ tif d'alimentation (1) étant disposé entre une source de métal (P) en fusion et la machine de coulée (2), ce dispositif étant caractérisé en ce qu'il présente une structure modulaire (3, 16) comportant d'une part un siphon (3) d'amenée du métal en fusion de la source de métal (P) vers la machine de coulée (2), et d'autre part des plaques amovibles (16) de chauffage du siphon (3), disposées autour de celui-ci et en contact avec lui.1. Device for supplying (1) molten metal to a casting machine (2), in particular for an installation of vertical ascending continuous casting of parts, in particular of tubes, made of cast iron, said supply device (1) being placed between a source of molten metal (P) and the casting machine (2), this device being characterized in that it has a modular structure (3, 16) comprising on the one hand a siphon ( 3) for supplying molten metal from the metal source (P) to the casting machine (2), and on the other hand removable plates (16) for heating the siphon (3), arranged around it here and in contact with him.
2. Dispositif d'alimentation (1) selon la revendication 1, caractérisé en ce que ledit siphon (3) est une pièce interchangeable, notamment réal." -ée en béton réfractaire moulé.2. Supply device (1) according to claim 1, characterized in that said siphon (3) is an interchangeable part, in particular real. "-Ee in molded refractory concrete.
3. Dispositif d'alimentation (1) selon la revendication 1 ou la revendication 2, caractérisé en ce que le siphon (3) est une pièce ayant sensiblement une forme de U, comportant un premier canal sensiblement vertical (20) terminé vers le haut par un orifice d'entrée (24) du métal en fusion, un second canal sensiblement vertical (22) débouchant à la base de la machine de coulée (2) par un orifice de sortie (26) du métal en fusion, et un canal (21) sensiblement horizontal reliant les canaux verticaux (20, 22) entre eux.3. Feeding device (1) according to claim 1 or claim 2, characterized in that the siphon (3) is a part having substantially a U shape, having a first substantially vertical channel (20) terminated upwards by an inlet (24) of the molten metal, a second substantially vertical channel (22) opening at the base of the casting machine (2) by an outlet (26) of the molten metal, and a channel (21) substantially horizontal connecting the vertical channels (20, 22) together.
4. Dispositif d'alimentation (1) selon la revendication 3, caractérisé en ce que la pièce présente autour du second canal (22) une forme tronconique (3C) destinée à coopérer à joint étanche avec la base conju¬ guée (10A) de la machine de coulée (2).4. Feeding device (1) according to claim 3, characterized in that the part has around the second channel (22) a frustoconical shape (3C) intended to cooperate with a tight seal with the base conju¬ ford (10A) the casting machine (2).
5. Dispositif d'alimentation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre une carcasse (17) en matériau réfractaire, entourant le siphon (3) et les pla¬ ques de chauffage (16) de manière à laisser libre un espace (28) entre l'intérieur de la carcasse (17) et les plaques de chauffage (16), ledit espace (28) étant comblé avec un matériau (19) isolant thermique et protecteur chimique.5. Feeding device (1) according to any one of the preceding claims, characterized in that it further comprises a carcass (17) in refractory material, surrounding the siphon (3) and the heating plates (16) so as to leave free a space (28) between the interior of the carcass (17) and the heating plates (16), said space (28) being filled with a thermal insulating and chemical protective material (19).
6. Dispositif d'alimentation (1) selon la revendication 5, caractérisé en ce que la carcasse (17) comporte des moyens de chauffage (18) des plaques de chauffage (16), notamment constitués par un circuit inducteur (18) noyé dans la carcasse (17), les plaques de chauffage (16) faisant office d'induit.6. Feeding device (1) according to claim 5, characterized in that the carcass (17) comprises heating means (18) heating plates (16), in particular constituted by an inductor circuit (18) embedded in the carcass (17), the heating plates (16) acting as armature.
7. Dispositif d'alimentation (1) selon la revendication 5 ou la revendication 6, caractérisé en ce que ledit matériau (19) isolant thermique et protecteur chimique est du sable fin de fonderie.7. Feeding device (1) according to claim 5 or claim 6, characterized in that said material (19) thermal insulator and chemical protector is fine foundry sand.
8. Dispositif d'alimentation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les plaques de chauffage (16) sont en graphite. 8. Supply device (1) according to any one of the preceding claims, characterized in that the heating plates (16) are made of graphite.
9. Dispositif d'alimentation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que 1'empilement du siphon (3) et des plaques de chauffage (16) entourant le siphon (3) est disposé sur des briques réfractaires (27). 9. Feeding device (1) according to any one of the preceding claims, characterized in that the stack of the siphon (3) and the heating plates (16) surrounding the siphon (3) is placed on refractory bricks (27).
10. Dispositif d'alimentation (1) selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le siphon (3) comporte des faces planes d'appui de chaque plaque de chauffage (16).10. Supply device (1) according to any one of claims 1 to 9, characterized in that the siphon (3) has flat bearing faces of each heating plate (16).
11. Installation de coulée de pièces métal- liques, notamment de coulée continue verticale ascendante de tubes en fonte, caractérisée en ce qu'elle comporte un dispositif d'alimentation (1) de métal en fusion selon l'une quelconque des revendications précédentes. 11. Installation for casting metal parts, in particular for vertical upward continuous casting of cast iron tubes, characterized in that it comprises a supply device (1) for molten metal according to any one of the preceding claims.
EP94916280A 1993-05-19 1994-05-11 Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same Expired - Lifetime EP0699112B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9306063 1993-05-19
FR9306063A FR2705259B1 (en) 1993-05-19 1993-05-19 Device for supplying molten metal, in particular cast iron, to a casting machine, and casting installation integrating this supply device.
PCT/FR1994/000570 WO1994026444A1 (en) 1993-05-19 1994-05-11 Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same

Publications (2)

Publication Number Publication Date
EP0699112A1 true EP0699112A1 (en) 1996-03-06
EP0699112B1 EP0699112B1 (en) 1997-02-26

Family

ID=9447301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916280A Expired - Lifetime EP0699112B1 (en) 1993-05-19 1994-05-11 Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same

Country Status (31)

Country Link
US (1) US5732763A (en)
EP (1) EP0699112B1 (en)
JP (1) JP2837275B2 (en)
KR (1) KR960702365A (en)
CN (1) CN1061277C (en)
AT (1) ATE149107T1 (en)
AU (1) AU683263B2 (en)
BG (1) BG100162A (en)
BR (1) BR9406304A (en)
CA (1) CA2163214A1 (en)
CU (1) CU22408A3 (en)
CZ (1) CZ283046B6 (en)
DE (1) DE69401814T2 (en)
DK (1) DK0699112T3 (en)
DZ (1) DZ1780A1 (en)
EG (1) EG20391A (en)
ES (1) ES2101535T3 (en)
FI (1) FI955549A (en)
FR (1) FR2705259B1 (en)
GR (1) GR3022812T3 (en)
HR (1) HRP940309A2 (en)
HU (1) HUT75913A (en)
MA (1) MA23195A1 (en)
MX (1) MX9403677A (en)
PL (1) PL311694A1 (en)
RU (1) RU2111830C1 (en)
SK (1) SK142395A3 (en)
TN (1) TNSN94047A1 (en)
WO (1) WO1994026444A1 (en)
YU (1) YU28294A (en)
ZA (1) ZA943423B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751249B1 (en) * 1996-07-17 1998-09-04 Pont A Mousson DEVICE FOR POSITIONING A DIE BLOCK OF A CASTING TABLE OF AN ASCENDING VERTICAL CONTINUOUS CASTING MACHINE
FR2751250B1 (en) 1996-07-17 1998-08-21 Pont A Mousson DEVICE FOR CLAMPING A CASTING TABLE OF A VERTICAL CONTINUOUS CASTING MACHINE OF PIECES, IN PARTICULAR TUBES, IN CAST IRON
DE19900574A1 (en) * 1999-01-09 2000-07-13 Georg Fischer Disa Ag Method and device for increasing the casting of light metal
US6973955B2 (en) * 2003-12-11 2005-12-13 Novelis Inc. Heated trough for molten metal
CN101468385B (en) * 2007-12-29 2010-11-24 中国船舶重工集团公司第七二五研究所 Molten metal linkage conveyer device for preparing metal powder and casting part
WO2014084793A1 (en) * 2012-11-30 2014-06-05 Martin Eriksson Arrangement for casting from the bottom of metal/steel
AT515244A2 (en) * 2013-12-30 2015-07-15 Inteco Special Melting Technologies Gmbh Method for producing long ingots of large cross section
CN105689669A (en) * 2016-03-21 2016-06-22 安徽鑫旭新材料股份有限公司 Upward continuous casting machine capable of achieving automatic copper material feeding
FR3050390B1 (en) * 2016-04-26 2020-01-24 Roctool METHOD AND DEVICE FOR SHELL MOLDING OF A METAL ALLOY
WO2018067164A1 (en) * 2016-10-07 2018-04-12 Hewlett-Packard Development Company, L.P. Injection molding with multiple gates
CN110090919A (en) * 2019-03-12 2019-08-06 江苏圣大中远电气有限公司 Aluminium brone casting melts casting technique
CN112091187B (en) * 2020-08-31 2021-08-24 帅翼驰(河南)新材料科技有限公司 Casting device of aluminum ingot continuous casting production line

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875991A (en) * 1956-01-09 1959-03-03 Donald R Ruegsegger Humidifier
DE2362702C3 (en) * 1974-01-07 1978-03-09 Uralskij Ordena Trudovogo Krasnogo Znameni Politechnitscheskij Institut Imeni S.M. Kirova, Swerdlowsk (Sowjetunion) Device for feeding, conveying and metering molten metal to a continuous casting mold
GB1483517A (en) * 1974-11-06 1977-08-24 Gravicast Patent Gmbh Method of casting
FR2573683B1 (en) * 1984-11-26 1987-01-02 Pont A Mousson LIQUID METAL SUPPLY SYSTEM WITH LIQUID METAL TEMPERATURE CONTROL FOR THE CONTINUOUS CASTING OF A CAST IRON PIPE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9426444A1 *

Also Published As

Publication number Publication date
CU22408A3 (en) 1996-01-31
DE69401814D1 (en) 1997-04-03
MA23195A1 (en) 1994-12-31
US5732763A (en) 1998-03-31
BR9406304A (en) 1995-12-26
CZ303695A3 (en) 1996-07-17
MX9403677A (en) 1995-01-31
CN1061277C (en) 2001-01-31
TNSN94047A1 (en) 1995-04-25
JP2837275B2 (en) 1998-12-14
GR3022812T3 (en) 1997-06-30
ATE149107T1 (en) 1997-03-15
CN1123529A (en) 1996-05-29
DE69401814T2 (en) 1997-06-12
ES2101535T3 (en) 1997-07-01
HUT75913A (en) 1997-05-28
EG20391A (en) 1999-02-28
AU6799794A (en) 1994-12-12
DZ1780A1 (en) 2002-02-17
HRP940309A2 (en) 1996-08-31
YU28294A (en) 1996-10-18
DK0699112T3 (en) 1997-09-01
EP0699112B1 (en) 1997-02-26
FR2705259A1 (en) 1994-11-25
HU9503289D0 (en) 1996-01-29
JPH08506275A (en) 1996-07-09
BG100162A (en) 1996-07-31
WO1994026444A1 (en) 1994-11-24
CZ283046B6 (en) 1997-12-17
AU683263B2 (en) 1997-11-06
PL311694A1 (en) 1996-03-04
CA2163214A1 (en) 1994-11-24
FI955549A0 (en) 1995-11-17
RU2111830C1 (en) 1998-05-27
FI955549A (en) 1995-11-17
SK142395A3 (en) 1997-10-08
ZA943423B (en) 1995-02-09
FR2705259B1 (en) 1995-07-07
KR960702365A (en) 1996-04-27

Similar Documents

Publication Publication Date Title
EP0699112B1 (en) Device for feeding molten metal, particularly cast iron, to a casting machine, and casting installation incorporating same
EP0103220B1 (en) Casting channel with induction heating
EP0197482A2 (en) Apparatus for stirring molten metal in a continuous-casting machine
EP3700695A1 (en) Method and device for moulding, in particular a metallic glass
EP1945858B1 (en) Mold for aluminothermal welding of railway tracks
EP0005676A2 (en) Electromagnetic agitating process applied to continuous casting
CA1171141A (en) Composite crucible
CA2295393A1 (en) Distributor of continuous casting of metals, of a type allowing at least one plasma torch for heating metal
CA2176843C (en) Process for lubricating sides of an ingot used for continuous pouring; ingot using said process
EP3099845B1 (en) Anode assembly and associated production method
EP0100272B1 (en) Process and apparatus for the production of castings, and castings produced by this process
EP0891237B1 (en) Continuous casting method for metals and ingot mould for implementing same
FR2715941A1 (en) Direct current metal melting furnace.
FR2498961A1 (en) PROCESS AND DEVICE FOR MANUFACTURING FLAT INGOTS
FR2747062A1 (en) CONTINUOUS CASTING LINGOTIERE FOR CONTINUOUS CASTING WITH VERTICAL METAL LOAD
EP0142402A1 (en) Horizontal continuous casting installation for metals, especially for steel
BE1011970A3 (en) Process development of a metal jacket on a tree.
EP1152855B1 (en) Method and device for moulding titanium parts
FR2498960A1 (en) PROCESS FOR CASTING STEEL, ESPECIALLY STEEL INGOTS
FR2658745A1 (en) Method and device for moulding a metal alloy
WO2004036958A1 (en) Device for electrical connection of an electrode, in particular of a metallurgical furnace electrode
EP0633709A1 (en) Operating process of a DC arcfurnace with a bottom electrode and refractory part for its realisation
BE891950A (en) STEEL CASTING PROCESS, PARTICULARLY STEEL INGOTS
WO2007065983A1 (en) Device for electromagnetically stirring liquid metal for a continuous casting line
FR2576812A1 (en) Method for the horizontal continuous casting of metals, particularly steel, and device for implementing this method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19951214

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 951214

RAX Requested extension states of the european patent have changed

Free format text: SI PAYMENT 951214

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19960618

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 951214

REF Corresponds to:

Ref document number: 149107

Country of ref document: AT

Date of ref document: 19970315

Kind code of ref document: T

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KIRKER & CIE SA

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970228

REF Corresponds to:

Ref document number: 69401814

Country of ref document: DE

Date of ref document: 19970403

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: MC

Payment date: 19970417

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19970421

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970424

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 19970430

Year of fee payment: 4

Ref country code: GR

Payment date: 19970430

Year of fee payment: 4

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 72281

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 19970515

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970527

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19970529

Year of fee payment: 4

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3022812

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970613

Year of fee payment: 4

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19970305

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2101535

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19970703

Year of fee payment: 4

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980511

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980511

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980511

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980512

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

BERE Be: lapsed

Owner name: S.A. PONT-A-MOUSSON

Effective date: 19980531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981130

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981201

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 94916280.4

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19981201

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19981130

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030516

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120510

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120509

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120516

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20120607

Year of fee payment: 19

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131203

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69401814

Country of ref document: DE

Effective date: 20131203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130511

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20140606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130512