EP1358029A1 - Method and device for refractory dressing of rolls of a metal strip continuous casting machine - Google Patents

Method and device for refractory dressing of rolls of a metal strip continuous casting machine

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Publication number
EP1358029A1
EP1358029A1 EP02703655A EP02703655A EP1358029A1 EP 1358029 A1 EP1358029 A1 EP 1358029A1 EP 02703655 A EP02703655 A EP 02703655A EP 02703655 A EP02703655 A EP 02703655A EP 1358029 A1 EP1358029 A1 EP 1358029A1
Authority
EP
European Patent Office
Prior art keywords
coating
potting
cylinders
adjustment
product
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
EP02703655A
Other languages
German (de)
French (fr)
Other versions
EP1358029B1 (en
Inventor
Pierre-Yves Menet
Patrick Golestin
Jean-Luc Stoecklin
Frédéric BASSON
Klaus Maiwald
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.)
Novelis Inc Canada
Original Assignee
Pechiney Rhenalu SAS
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 Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Publication of EP1358029A1 publication Critical patent/EP1358029A1/en
Application granted granted Critical
Publication of EP1358029B1 publication Critical patent/EP1358029B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0668—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for dressing, coating or lubricating

Definitions

  • the invention relates to the continuous casting between rolls of metal strips, in particular aluminum or aluminum alloy strips. It relates more particularly to a method and a device for poteying said cylinders during casting.
  • Continuous casting between cylinders is a well-known technique for producing metal strips from a source of liquid metal.
  • liquid metal is injected into the air gap separating two rotating metal cylinders, solidifies on contact with them and leaves in the solid state, in the form of a strip.
  • the solidified metal partially adheres to the surface of the rolls, which leads to a deterioration in the quality of the strip, or even to stopping the casting.
  • a liquid coating product also called “lubricant”
  • the poteyage product is often a mixture of water and graphite particles.
  • the coating is normally applied continuously, that is to say that the working surface of a cylinder is coated substantially continuously with the coating product.
  • Known poteyage devices include one or more projection means per cylinder which can be fixed or mobile.
  • French applications FR 2498 099 (corresponding to American patent US 4,501,315) and FR 2,621,839 (corresponding to American patent US 4,892,133) describe potage devices with adjustable flow rate comprising distribution ramps for the product of potage provided with projection means arranged linearly along the cylinders.
  • the international patent application WO 95/09707 describes a coating device provided with spray nozzles for the coating product aligned along the cylinders and grouped by zones, each zone being supplied separately with coating product as a function of the width of the strip. metallic. A part of the nozzles can be driven in an oscillatory movement parallel to the axis of the cylinders.
  • the Applicant has therefore sought solutions to improve the coating of cylinders for machines for continuously casting metal strips.
  • the subject of the invention is a method for coating the cylinders of a continuous casting machine between cylinders in which at least one coating product containing a coating agent is applied, such as a graphite suspension, which is characterized in that that it comprises an adjustment of the composition of said poteyage product being applied to said cylinders.
  • the invention also relates to a continuous casting process between cylinders of metal strips comprising a coating process according to the invention.
  • the invention also relates to a device for poteying the cylinders which is suitable for use on a continuous casting machine between cylinders, which comprises means for applying at least one poteyage product and which is characterized in that it comprises means for adjusting the composition of said poteyage product during application on said cylinders.
  • the invention also relates to a continuous casting machine between cylinders of metal strips equipped with a coating device according to the invention.
  • the invention also relates to a method for regulating a continuous casting machine between rolls of metal strips comprising the application of at least one coating product to said cylinders, said coating product containing a coating agent, such as that of graphite, which is characterized in that it comprises an adjustment of the composition of said poteyage product being applied to said cylinders. Said adjustment is advantageously carried out according to the operating conditions of said machine.
  • Said continuous casting can be horizontal, inclined with respect to the horizontal or vertical (ascending or descending).
  • the applicant sought to control the quantity and the distribution of the coating product which is deposited on the working surface of the cylinders.
  • the changes in the flow rate of the projection means modified not only the quantity of poteyage product deposited on the cylinders but also the distribution of said product on their surface. of work, with the consequence, in particular, of uncontrolled variations in the efficiency of the coating, in particular as regards the stability of the casting machine and the quality of the strip produced.
  • variations in the flow rate of the spraying agent sprayed onto the working surface of a cylinder by projection means can produce variations in the distribution of the spraying agent inside the spraying cone or “jets” and on the impact surface, whereas, in general, variations in the composition of the coating product do not modify said distribution significantly.
  • the applicant had the idea of adjusting the composition of the coating product during application, which makes it possible to adjust the amount of coating agent supplied to the surface of the coating. cylinder while limiting the heterogeneities of distribution of said agent.
  • the poteyage product can be a suspension, a solution or a mixture thereof.
  • FIG. 1 schematically represents, seen from the side, a continuous casting machine between cylinders provided with poteyage means typical of the prior art.
  • Figure 2 is a schematic representation of a potage device of a continuous casting machine between cylinders of the prior art.
  • Figure 3 is a schematic representation of a preferred embodiment of a poteyage device of a continuous casting machine between cylinders according to the invention.
  • FIG. 4 schematically represents variants of a part of the potaging device of a continuous casting machine between rolls according to the invention.
  • FIG. 5 illustrates the influence of a variation in the spray of plastering product from juxtaposed projection means on the distribution of plastering product on the surface of a cylinder.
  • FIG. 6 illustrates the influence of a variation in the spraying of plastering product of juxtaposed projection means on the distribution of plastering product on the surface of a cylinder in the case of a strong overlap between the jets.
  • FIG. 7 schematically represents, seen from the side, a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
  • Figure 8 is a simplified representation, seen from above, of a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
  • Figure 9 is a simplified representation, seen from above, of a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
  • a machine (1) for continuous casting between cylinders typically comprises two horizontal cylinders (1 A, IB) and an injector (2).
  • the cylinders (1A, IB) are typically made of metal and generally have the same diameter.
  • the axes of rotation (A, B) of the cylinders (1A, IB) are generally substantially parallel to each other.
  • the cylinders are separated by an air gap (13) and are able to rotate in opposite directions with respect to each other.
  • the liquid metal (3) is introduced on one side of the air gap (13) using the injector (2) and leaves the other side in the solid state, in the form of a strip. (4) having a nominal thickness Eo which is substantially equal to the opening E of the air gap (13).
  • the surface (10) of the cylinders is continuously cooled, typically using a coolant circulating inside the cylinders.
  • the casting is said to be horizontal when the center distance AB between the cylinders (1A) and (IB) is substantially vertical. It is said to be inclined when said center distance AB is inclined relative to the vertical. It is said to be vertical when said center distance AB is substantially horizontal.
  • a continuous casting machine between rolls is normally provided with coating means typically comprising projection means (5) of the coating product (24), support means (7, 8) of said projection means, a source (22) of cleaning product (24), an agitator (23), pipes (6, 21) for conveying the cleaning product (24) and a means (20) for regulating the flow of the cleaning product.
  • the source (22) of poteyage product is typically a reservoir with a capacity of the order of 100 to 200 liters.
  • the method for coating the rolls (1A, IB) of a machine (1) for continuous casting between rolls comprises applying at least one coating product (24) to said rolls, said coating product poteyage containing a poteyage agent and a carrier fluid, and is characterized in that it comprises an adjustment of the composition of said poteyage product (24) being applied to said cylinders.
  • the invention is based on the idea of varying the composition of the coating product in order to avoid variations in the size of the jets and in the distribution of the coating agent inside the spray cone or “jets” ( 9, 91, 92) and on the impact surface (100, 101, 102) which can appear when the flow rate of the projection means (5, 51, 52) is varied.
  • the coating agent preferably comprises graphite, typically in the form of micron particles.
  • the carrier fluid preferably comprises water.
  • the graphite is suspended in the carrier fluid, optionally in colloidal form, with a concentration which is typically between 0.2 and 4% by weight.
  • said adjustment of the composition comprises an adjustment of the proportion of potting agent contained in the potting product, that is to say of the concentration of potting agent of said product poteyage.
  • the adjustment of the composition comprises a dilution of a concentrate of potting agent in a carrier fluid.
  • Said concentrate can be a "mother suspension", a concentrated solution or a mixture thereof.
  • Said concentrate is advantageously chosen from concentrated suspensions of graphite, boron nitride, colloidal silica, magnesia, organic products (such as organic oils or polyesters) or a mixture of these.
  • a mother suspension which is a concentrate of graphite particles suspended in a gel, with a proportion of graphite typically between 20 and 30% by weight.
  • the carrier fluid is then generally water.
  • the proportion of mother suspension added to the carrier fluid is typically between 1 and 8%.
  • the method according to the invention also comprises an adjustment of the flow rate of the coating product so as to obtain a stability of the jet over time, in particular between the moment when the guns are adjusted relative to the cylinders , outside casting, and during casting.
  • the adjustment of the composition can be carried out retroactively as a function of measurements carried out on the casting machine (1) (typically using a control loop) and / or in an automated manner.
  • Said measurements typically include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements.
  • the amount of potting agent present on the surface (10) of the cylinders can be determined using a detector (such as an optical detector, a laser system, a camera or an infrared detector) which produces a signal which can be used in feedback to regulate the composition of the poteyage product.
  • Said adjustment of the composition can then correspond to regulation.
  • the process of the invention can be included in a process for regulating a continuous casting machine between rolls.
  • the device for poteying a cylinder (1A, IB), which is suitable for use on a continuous casting machine between cylinders, comprises coating means (5, 51, 52, 6, 61 , 62, 7, 8, 20, 21) for applying at least one coating product (24) to said cylinders and is characterized in that it comprises means (30 to 41) for adjusting the composition of the coating product in course of application on said cylinders.
  • the coating device according to the invention is capable of implementing the coating method of the invention.
  • the coating means advantageously comprise means (20) for controlling the flow rate of the projection means (5, 51, 52), such as a positive displacement pump.
  • the conduits (6, 21) can be made of different materials compatible with the coating product and the ambient conditions of a continuous casting machine.
  • a part (6) of the conduits is preferably flexible.
  • the coating means can be placed at different locations on the periphery of the cylinders. They are however advantageously placed on the outlet side, that is to say on the side of the metal strip, so as not to be in contact with the liquid metal, which could lead to risks of explosion.
  • the coating product comprises a carrier fluid, such as water, and a solid coating agent, such as graphite
  • the coating means according to the invention can also comprise means (38, 39), active or passive, such as an agitator (38) or a baffle (39), to homogenize the cleaning product.
  • the coating means according to the invention may optionally include means (38) for keeping the particles of coating agent in suspension.
  • said means for adjusting (30 to 41) the composition of the coating product include a mixer (40), a supply of coating agent ( 41), a means of regulation (32) of the supply of potentage agent and a supply of carrier fluid (30).
  • the regulating means (32) makes it possible to control and regulate the quantity of potetting agent which is supplied to the mixer (40) and applied to the cylinders by the coating means.
  • the regulating means (32) may include, for example, a metering pump.
  • Said mixer (40) can also be a Nenturi, a buffer tank or a pot.
  • the mixer (40) is advantageously of very low capacity (for example from 1 to 2 liters), which in particular makes it possible to quickly vary the concentration of potting agent contained in the potting product.
  • the mixer (40) can be common to several projection means.
  • FIG. 4 illustrates two embodiments of said adjustment means (30 to 41).
  • said adjustment means (30 to 41) comprise a reservoir (34) capable of containing said concentrate (35), a means of regulation (32) of the supply of poteyage, piping means (31, 33), a supply of carrier fluid (30), a buffer tank (36) capable of containing the poteyage product (24), a mixing zone (37) and an agitator (38 ).
  • a reservoir (34) capable of containing said concentrate (35)
  • a means of regulation (32) of the supply of poteyage piping means (31, 33), a supply of carrier fluid (30), a buffer tank (36) capable of containing the poteyage product (24), a mixing zone (37) and an agitator (38 ).
  • said adjustment means (30 to 41) comprise a reservoir (34) capable of containing said concentrate (35), a means of regulation (32) of the supply of poteyage, means of pipelines (31, 33), a supply of carrier fluid (30), a pot (36) capable of containing the cleaning product (24), a mixing zone (37), baffles (39) and an agitator (38) .
  • the Applicant has had the idea that the dilution of a concentrate of potting agent in a carrier fluid in a mixer (40), in particular when the latter is of low capacity, could make it possible to avoid the problems of sedimentation of the potting agent which are often observed with known devices (which generally operate in “batch” mode using large-capacity tanks (22), as seen typically between 100 and 200 liters) and which cause fluctuations in the actual composition of the coating product compared to the nominal value.
  • the use of one or more mixers (40) of low capacity also makes it possible to reduce their volume and, consequently, the size of the casting installations. It also simplifies orders.
  • the supply of coating agent (41) advantageously comprises a reservoir (34), starting from from which the mixer (40) can be supplied in a regulated manner.
  • the means (30 to 41) for adjusting the composition of the coating product can form an adjustment device (42) which is advantageously distinct, removable and / or removable, which facilitates maintenance.
  • the coating device of the invention can comprise means for retroactively controlling said adjustment of the composition as a function of measurements carried out on said casting machine, for example using a regulation loop. It can also include means for automatically controlling said adjustment of the composition.
  • the projection means (5, 51, 52) are typically chosen from the group comprising nozzles and guns.
  • the coating means may include a only one projection means (5) per cylinder ( Figure 1) or more projection means (51, 52) per cylinder ( Figures 7 and 9). In the latter case, the projection means can be superimposed (as illustrated in FIG. 7) or distributed along the cylinder (as illustrated in FIG. 9).
  • the coating means may also include means for moving the projection means along the cylinder, typically in an oscillating movement or in a reciprocating movement between one end (11) and the other (12 ) of the cylinder.
  • said coating means comprise a projection means (5) for each cylinder (1A, IB) and means (80 to 84) for moving said projection means (5) along each cylinder, typically in a back and forth movement.
  • said coating means comprise at least two projection means (51, 52) for each cylinder (1 A, IB), said projection means forming an integral assembly, and means ( 80 to 84) to move each said together along each cylinder, typically in a reciprocating motion.
  • the projection means of each said assembly are advantageously superimposed, as illustrated in FIG. 7, when it is sought to produce strips of large width (which is normally made difficult by the limited maximum speed of the means of displacement of the means projections).
  • the displacement means (80 to 84) typically comprise a mobile support or carriage (80), a rail (81) and drive means (82, 83, 84) such as a motor.
  • said displacement means (80 to 84) make it possible to move said projection means in a reciprocating movement along an axis parallel to the axis (A, B) of the cylinder.
  • said coating means comprise at least two projection means (5) for each cylinder and said projection means are arranged on a line substantially parallel to the axis (A, B) of each said cylinder (1A, IB).
  • the projection means are typically equidistant.
  • the orientation of the projection means can be fixed or variable.
  • the device according to the invention may also include means for oscillating at least one of the projection means with respect to a determined axis, which makes it possible to increase the impact surface of the projection means and, optionally, to decrease the number.
  • the axis of oscillation is typically vertical.
  • the invention is particularly advantageous in the case where at least two projection means are used per cylinder.
  • the overlap of the projection cones (9, 91, 92) and the impact surfaces (100, 101, 102) can cause significant variations in the distribution of the total coating agent.
  • multiple means of projection For example, as illustrated diagrammatically in FIG. 5, where D represents the surface density of the coating agent, the total impact surface of two juxtaposed projection means can undergo not only radial variations in density, as c is the case of a single projection means, but also very large variations in density in the contact zone between the projection cones and the impact surfaces, even if the coating may be close to the nominal value N in S zones where the impact surfaces do not overlap.
  • FIG. 5a corresponds to the case where the two jets form a relatively closed angle with respect to the desired optimal value; the overlap between the projection cones and the two impact surfaces is in this case very low or zero, which leads to underpotting areas E with respect to the nominal value N.
  • FIG. 5b) corresponds to the case where the two jets form a relatively open angle with respect to the desired optimal value; the overlap between the projection cones and the two impact surfaces is in this case not insignificant, or even significant, which leads to overpotting areas R with respect to the nominal value N.
  • FIG. 6 shows that a similar effect can occur even if the overlap areas between the impact surfaces are very large.
  • the amount of coating applied in certain zones can fluctuate very significantly, passing from under-coating in certain zones T when the angle of the jets is relatively closed with respect to the desired optimal value (FIG. 6a) to an overpotting in the same zones T when the angle of the jets is relatively open (FIG. 6b).
  • the machine (1) for continuous casting between cylinders according to the invention can comprise at least one detector for determining the quantity of potentage agent present on the surface (10) of the cylinders which produces a signal suitable for being used in feedback to adjust the the composition of the poteyage product.
  • Said detector is typically chosen from optical detectors, laser systems, cameras, infrared detectors, vibration detectors and mechanical tension detectors.
  • said adjustment can be made as a function of the operating conditions of said machine (1). It can also be carried out retroactively as a function of measurements carried out on said casting machine, for example using a regulation loop. Said measurements can include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements. Said adjustment of the composition can also be carried out automatically.
  • the invention relates above all to the production of strips of non-ferrous metals, in particular aluminum or aluminum alloy or copper or copper alloy.
  • the quality of the surface of the strips was verified by a macrographic attack on full-width samples.
  • the Applicant has noted a significant improvement in quality of the surface of the strips, greater reproducibility of this quality and a productivity of about 10% higher than that observed for casting carried out with a batching in batch mode, with large capacity tanks and a simple adjustment of the product flow rate poteyage. She attributes these improvements to a more uniform and better controlled distribution of potting agent.
  • the invention which can be integrated into the methods and devices for continuous casting between existing rolls, makes it possible to improve the quality of the strips obtained and the consistency of the coating on the rolls.
  • the quality is notably improved by the adjustment of the jets which can remain the same whatever the operating range of the machine.
  • the consistency of the deposit makes it possible to significantly limit the quantity of poteyage product necessary to obtain strips of determined quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Continuous Casting (AREA)
  • Lubricants (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Devices For Molds (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

The invention concerns a method for refractory dressing of rolls of a machine for continuous casting between rolls which consists in applying a mould dressing product containing a mould dressing agent, such as graphite, and in adjusting the mould dressing product composition while it is being applied on the rolls. The invention also concerns a device for refractory dressing of rolls of a machine for continuous casting between rolls comprising means for applying a mould dressing product and means for adjusting the composition of the mould dressing product while it is being applied on the rolls. The invention enables to control the amount and the distribution of the mould dressing product on the surface of the rolls.

Description

PROCEDE ET DISPOSITIF DE POTEYAGE DES CYLINDRES D'UNE MACHINE DE COULEE CONTINUE DE BANDES METALLIQUES METHOD AND DEVICE FOR POTTING THE CYLINDERS OF A CONTINUOUS CASTING MACHINE FOR METAL STRIPS
Domaine de L'inventionField of the Invention
L'invention concerne la coulée continue entre cylindres de bandes métalliques, notamment de bandes en aluminium ou en alliage d'aluminium. Elle concerne tout particulièrement un procédé et un dispositif de poteyage desdits cylindres en cours de coulée.The invention relates to the continuous casting between rolls of metal strips, in particular aluminum or aluminum alloy strips. It relates more particularly to a method and a device for poteying said cylinders during casting.
Etat de la techniqueState of the art
La coulée continue entre cylindres est une technique bien connue pour produire des bandes métalliques à partir d'une source de métal liquide. Typiquement, du métal liquide est injecté dans l'entrefer séparant deux cylindres métalliques en rotation, se solidifie au contact de ceux-ci et sort à l'état solide, sous forme de bande.Continuous casting between cylinders is a well-known technique for producing metal strips from a source of liquid metal. Typically, liquid metal is injected into the air gap separating two rotating metal cylinders, solidifies on contact with them and leaves in the solid state, in the form of a strip.
En général, en l'absence de précautions particulières, le métal solidifié adhère partiellement à la surface des cylindres, ce qui conduit à une détérioration de la qualité de la bande, voire à l'arrêt de la coulée. Afin d'éviter ce phénomène dit « de collage », qui est d'autant plus marqué que la productivité de l'installation est élevée, il est connu de poteyer la surface de travail des cylindres par projection d'un produit de poteyage liquide (également appelé « lubrifiant ») à l'aide de buses ou de pistolets. Le produit de poteyage est souvent un mélange d'eau et de particules de graphite. Le poteyage est normalement appliqué en continu, c'est-à-dire qu'on enduit de manière sensiblement continue la surface de travail d'un cylindre avec le produit de poteyage.In general, in the absence of special precautions, the solidified metal partially adheres to the surface of the rolls, which leads to a deterioration in the quality of the strip, or even to stopping the casting. In order to avoid this phenomenon known as “sticking”, which is all the more marked as the productivity of the installation is high, it is known to clean the working surface of the cylinders by spraying with a liquid coating product ( also called "lubricant") using nozzles or guns. The poteyage product is often a mixture of water and graphite particles. The coating is normally applied continuously, that is to say that the working surface of a cylinder is coated substantially continuously with the coating product.
Les dispositifs de poteyage connus comprennent un ou plusieurs moyens de projection par cylindre qui peuvent être fixes ou mobiles. Les demandes françaises FR 2498 099 (correspondant au brevet américain US 4 501 315) et FR 2 621 839 (correspondant au brevet américain US 4 892 133) décrivent des dispositifs de poteyage à débit ajustable comprenant des rampes de distribution du produit de poteyage munies de moyens de projection disposés linéairement le long des cylindres.Known poteyage devices include one or more projection means per cylinder which can be fixed or mobile. French applications FR 2498 099 (corresponding to American patent US 4,501,315) and FR 2,621,839 (corresponding to American patent US 4,892,133) describe potage devices with adjustable flow rate comprising distribution ramps for the product of potage provided with projection means arranged linearly along the cylinders.
La demande de brevet internationale WO 95/09707 décrit un dispositif de poteyage munie de buses de pulvérisation du produit de poteyage alignées le long des cylindres et regroupées par zones, chaque zone étant alimentée séparément en produit de poteyage en fonction de la largeur de la bande métallique. Une partie des buses peut être entraînée dans un mouvement oscillatoire parallèle à l'axe des cylindres.The international patent application WO 95/09707 describes a coating device provided with spray nozzles for the coating product aligned along the cylinders and grouped by zones, each zone being supplied separately with coating product as a function of the width of the strip. metallic. A part of the nozzles can be driven in an oscillatory movement parallel to the axis of the cylinders.
Problème poséProblem
Dans le cadre de ses efforts continus de développement des machines et procédés de coulée continue entre cylindres de bandes métalliques, la demanderesse a fait le constat que les procédés et dispositifs de poteyage connus ne permettaient pas d'éviter les phénomènes de collage dans toutes les conditions de production industrielle de bandes métalliques.In the context of its continuous efforts to develop machines and processes for continuous casting between cylinders of metal strips, the Applicant has noted that the known poteyage processes and devices do not allow gluing phenomena to be avoided under all conditions industrial production of metal strips.
La demanderesse a donc recherché des solutions pour améliorer le poteyage des cylindres de machines de coulée continue de bandes métalliques.The Applicant has therefore sought solutions to improve the coating of cylinders for machines for continuously casting metal strips.
Description de l'inventionDescription of the invention
L'invention a pour objet un procédé de poteyage des cylindres d'une machine de coulée continue entre cylindres dans lequel on applique au moins un produit de poteyage contenant un agent de poteyage, tel qu'une suspension de graphite, qui est caractérisé en ce qu'il comprend un ajustement de la composition dudit produit de poteyage en cours d'application sur lesdits cylindres. L'invention a également pour objet un procédé de coulée continue entre cylindres de bandes métalliques comprenant un procédé de poteyage selon l'invention.The subject of the invention is a method for coating the cylinders of a continuous casting machine between cylinders in which at least one coating product containing a coating agent is applied, such as a graphite suspension, which is characterized in that that it comprises an adjustment of the composition of said poteyage product being applied to said cylinders. The invention also relates to a continuous casting process between cylinders of metal strips comprising a coating process according to the invention.
L'invention a également pour objet un dispositif de poteyage des cylindre qui est apte à être utilisé sur une machine de coulée continue entre cylindres, qui comprend des moyens pour appliquer au moins un produit de poteyage et qui est caractérisé en ce qu'il comprend des moyens pour ajuster la composition dudit produit de poteyage en cours d'application sur lesdits cylindres.The invention also relates to a device for poteying the cylinders which is suitable for use on a continuous casting machine between cylinders, which comprises means for applying at least one poteyage product and which is characterized in that it comprises means for adjusting the composition of said poteyage product during application on said cylinders.
L'invention a également pour objet une machine de coulée continue entre cylindres de bandes métalliques équipée d'un dispositif de poteyage selon l'invention.The invention also relates to a continuous casting machine between cylinders of metal strips equipped with a coating device according to the invention.
L'invention a également pour objet un procédé de régulation d'une machine de coulée continue entre cylindres de bandes métalliques comprenant l'application d'au moins un produit de poteyage sur lesdits cylindres, ledit produit de poteyage contenant un agent de poteyage, tel que du graphite, qui est caractérisé en ce qu'il comprend un ajustement de la composition dudit produit de poteyage en cours d'application sur lesdits cylindres. Ledit ajustement est avantageusement effectué en fonction des conditions de fonctionnement de ladite machine.The invention also relates to a method for regulating a continuous casting machine between rolls of metal strips comprising the application of at least one coating product to said cylinders, said coating product containing a coating agent, such as that of graphite, which is characterized in that it comprises an adjustment of the composition of said poteyage product being applied to said cylinders. Said adjustment is advantageously carried out according to the operating conditions of said machine.
Ladite coulée continue peut être horizontale, inclinée par rapport à l'horizontale ou verticale (ascendante ou descendante).Said continuous casting can be horizontal, inclined with respect to the horizontal or vertical (ascending or descending).
Afin d'obtenir une efficacité de poteyage optimale, la demanderesse a cherché à contrôler la quantité et la répartition du produit de poteyage qui est déposée sur la surface de travail des cylindres. Or, elle a constaté au cours de ses essais que, contrairement à ce qui est normalement admis, les changements du débit des moyens de projection modifiaient non seulement la quantité de produit de poteyage déposée sur les cylindres mais également la répartition dudit produit sur leur surface de travail, avec pour conséquence, en particulier, des variations incontrôlées de l'efficacité du poteyage, notamment en ce qui a trait à la stabilité de la machine de coulée et à la qualité de la bande produite. Elle a en particulier remarqué que les variations de débit du produit de poteyage projeté sur la surface de travail d'un cylindre par un moyen de projection peut produire des variations de la répartition de l'agent de poteyage à l'intérieur du cône de projection ou «jets » et sur la surface d'impact, alors que, en général, les variations de la composition du produit de poteyage ne modifient pas ladite répartition de manière significative.In order to obtain an optimal coating efficiency, the applicant sought to control the quantity and the distribution of the coating product which is deposited on the working surface of the cylinders. However, it noted during its tests that, contrary to what is normally admitted, the changes in the flow rate of the projection means modified not only the quantity of poteyage product deposited on the cylinders but also the distribution of said product on their surface. of work, with the consequence, in particular, of uncontrolled variations in the efficiency of the coating, in particular as regards the stability of the casting machine and the quality of the strip produced. In particular, she noted that variations in the flow rate of the spraying agent sprayed onto the working surface of a cylinder by projection means can produce variations in the distribution of the spraying agent inside the spraying cone or “jets” and on the impact surface, whereas, in general, variations in the composition of the coating product do not modify said distribution significantly.
Pour résoudre le problème posé à l'invention, la demanderesse a eu l'idée d'ajuster la composition du produit de poteyage en cours d'application, ce qui permet d'ajuster la quantité d'agent de poteyage apportée à la surface du cylindre tout en limitant les hétérogénéités de répartition dudit agent. Le produit de poteyage peut être une suspension, une solution ou un mélange de ceux-ci.To solve the problem posed to the invention, the applicant had the idea of adjusting the composition of the coating product during application, which makes it possible to adjust the amount of coating agent supplied to the surface of the coating. cylinder while limiting the heterogeneities of distribution of said agent. The poteyage product can be a suspension, a solution or a mixture thereof.
L'invention sera mieux comprise à l'aide des figures et de la description détaillée qui suivent.The invention will be better understood with the aid of the figures and the detailed description which follow.
La figure 1 représente schématiquement, vue de côté, une machine de coulée continue entre cylindres munie de moyens de poteyage typique de l'art antérieur.FIG. 1 schematically represents, seen from the side, a continuous casting machine between cylinders provided with poteyage means typical of the prior art.
La figure 2 est une représentation schématique d'un dispositif de poteyage d'une machine de coulée continue entre cylindres de l'art antérieur.Figure 2 is a schematic representation of a potage device of a continuous casting machine between cylinders of the prior art.
La figure 3 est une représentation schématique d'un mode de réalisation préféré d'un dispositif de poteyage d'une machine de coulée continue entre cylindres selon l'invention.Figure 3 is a schematic representation of a preferred embodiment of a poteyage device of a continuous casting machine between cylinders according to the invention.
La figure 4 représente schématiquement des variantes d'une partie du dispositif de poteyage d'une machine de coulée continue entre cylindres selon l'invention.FIG. 4 schematically represents variants of a part of the potaging device of a continuous casting machine between rolls according to the invention.
La figure 5 illustre l'influence d'une variation du jet de produit de poteyage de moyens de projection juxtaposés sur la répartition de produit de poteyage sur la surface d'un cylindre. La figure 6 illustre l'influence d'une variation du jet de produit de poteyage de moyens de projection juxtaposés sur la répartition de produit de poteyage sur la surface d'un cylindre dans le cas d'un fort recouvrement entre les jets.FIG. 5 illustrates the influence of a variation in the spray of plastering product from juxtaposed projection means on the distribution of plastering product on the surface of a cylinder. FIG. 6 illustrates the influence of a variation in the spraying of plastering product of juxtaposed projection means on the distribution of plastering product on the surface of a cylinder in the case of a strong overlap between the jets.
La figure 7 représente schématiquement, vue de côté, une machine de coulée continue entre cylindres munie de moyens de poteyage selon un mode de réalisation possible de l'invention.FIG. 7 schematically represents, seen from the side, a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
La figure 8 est une représentation simplifiée, vue du dessus, d'une machine de coulée continue entre cylindres munie de moyens de poteyage selon un mode de réalisation possible de l'invention.Figure 8 is a simplified representation, seen from above, of a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
La figure 9 est une représentation simplifiée, vue du dessus, d'une machine de coulée continue entre cylindres munie de moyens de poteyage selon un mode de réalisation possible de l'invention.Figure 9 is a simplified representation, seen from above, of a continuous casting machine between cylinders provided with poteyage means according to a possible embodiment of the invention.
Description détaillée de l'inventionDetailed description of the invention
Tel qu'illustré à la figure 1, une machine (1) de coulée continue entre cylindres comprend typiquement deux cylindres horizontaux (1 A, IB) et un injecteur (2). Les cylindres (1A, IB) sont typiquement en métal et possèdent généralement le même diamètre. Les axes de rotation (A, B) des cylindres (1A, IB) sont en général sensiblement parallèles l'un à l'autre. Les cylindres sont séparés par un entrefer (13) et sont aptes à tourner en sens inverse l'un par rapport à l'autre.As illustrated in FIG. 1, a machine (1) for continuous casting between cylinders typically comprises two horizontal cylinders (1 A, IB) and an injector (2). The cylinders (1A, IB) are typically made of metal and generally have the same diameter. The axes of rotation (A, B) of the cylinders (1A, IB) are generally substantially parallel to each other. The cylinders are separated by an air gap (13) and are able to rotate in opposite directions with respect to each other.
Le métal liquide (3) est introduit d'un côté de l'entrefer (13) à l'aide de l'injecteur (2) et sort de l'autre côté à l'état solide, sous la forme d'une bande (4) ayant une épaisseur nominale Eo qui est sensiblement égale à l'ouverture E de l'entrefer (13). La surface (10) des cylindres est refroidie de manière continue, typiquement à l'aide d'un fluide de refroidissement circulant à l'intérieur des cylindres. La coulée est dite horizontale lorsque l'entraxe A-B entre les cylindres (1A) et (IB) est sensiblement vertical. Elle est dite inclinée lorsque ledit entraxe A-B est incliné par rapport à la verticale. Elle est dite verticale lorsque ledit entraxe A-B est sensiblement horizontal.The liquid metal (3) is introduced on one side of the air gap (13) using the injector (2) and leaves the other side in the solid state, in the form of a strip. (4) having a nominal thickness Eo which is substantially equal to the opening E of the air gap (13). The surface (10) of the cylinders is continuously cooled, typically using a coolant circulating inside the cylinders. The casting is said to be horizontal when the center distance AB between the cylinders (1A) and (IB) is substantially vertical. It is said to be inclined when said center distance AB is inclined relative to the vertical. It is said to be vertical when said center distance AB is substantially horizontal.
Une machine de coulée continue entre cylindres est normalement munie de moyens de poteyage comprenant typiquement des moyens de projection (5) du produit de poteyage (24), des moyens de support (7, 8) desdits moyens de projection, une source (22) de produit de poteyage (24), un agitateur (23), des tubulures (6, 21) pour acheminer le produit de poteyage (24) et un moyen (20) pour réguler le débit du produit de poteyage. La source (22) de produit de poteyage est typiquement un réservoir d'une capacité de l'ordre de 100 à 200 litres.A continuous casting machine between rolls is normally provided with coating means typically comprising projection means (5) of the coating product (24), support means (7, 8) of said projection means, a source (22) of cleaning product (24), an agitator (23), pipes (6, 21) for conveying the cleaning product (24) and a means (20) for regulating the flow of the cleaning product. The source (22) of poteyage product is typically a reservoir with a capacity of the order of 100 to 200 liters.
Selon l'invention, le procédé de poteyage des cylindres (1A, IB) d'une machine (1) de coulée continue entre cylindres comprend l'application d'au moins un produit de poteyage (24) sur lesdits cylindres, ledit produit de poteyage contenant un agent de poteyage et un fluide porteur, et est caractérisé en ce qu'il comprend un ajustement de la composition dudit produit de poteyage (24) en cours d'application sur lesdits cylindres.According to the invention, the method for coating the rolls (1A, IB) of a machine (1) for continuous casting between rolls comprises applying at least one coating product (24) to said rolls, said coating product poteyage containing a poteyage agent and a carrier fluid, and is characterized in that it comprises an adjustment of the composition of said poteyage product (24) being applied to said cylinders.
L'invention repose sur l'idée de varier la composition du produit de poteyage afin d'éviter les variations de la taille des jets et de la répartition de l'agent de poteyage à l'intérieur du cône de projection ou «jets » (9, 91, 92) et sur la surface d'impact (100, 101, 102) qui peuvent apparaître lorsqu'on varie le débit des moyens de projection (5, 51, 52).The invention is based on the idea of varying the composition of the coating product in order to avoid variations in the size of the jets and in the distribution of the coating agent inside the spray cone or “jets” ( 9, 91, 92) and on the impact surface (100, 101, 102) which can appear when the flow rate of the projection means (5, 51, 52) is varied.
L'agent de poteyage comprend de préférence du graphite, typiquement sous forme de particules microniques. Le fluide porteur comprend de préférence de l'eau. Le graphite est en suspension dans le fluide porteur, éventuellement sous forme colloïdale, avec une concentration qui se situe typiquement entre 0,2 et 4 % en poids. Dans le mode de réalisation préféré de l'invention, ledit ajustement de la composition comporte un ajustement de la proportion d'agent de poteyage contenu dans le produit de poteyage, c'est-à-dire de la concentration en agent de poteyage dudit produit de poteyage. Ainsi, il est possible de modifier la quantité d'agent de poteyage projeté sur le cylindre en modifiant la proportion d'agent de poteyage dans le produit de poteyage, sans modifier le débit des moyens de projection : on augmente la proportion d'agent de poteyage lorsqu'on veut projeter une plus grande quantité d'agent de poteyage sur la surface (10) du cylindre et on la diminue dans le cas inverse.The coating agent preferably comprises graphite, typically in the form of micron particles. The carrier fluid preferably comprises water. The graphite is suspended in the carrier fluid, optionally in colloidal form, with a concentration which is typically between 0.2 and 4% by weight. In the preferred embodiment of the invention, said adjustment of the composition comprises an adjustment of the proportion of potting agent contained in the potting product, that is to say of the concentration of potting agent of said product poteyage. Thus, it is possible to modify the amount of spraying agent sprayed onto the cylinder by modifying the proportion of spraying agent in the spraying product, without modifying the flow rate of the spraying means: the proportion of spraying agent is increased. poteyage when we want to spray a larger amount of potentage agent on the surface (10) of the cylinder and we decrease it in the opposite case.
De préférence, l'ajustement de la composition comporte une dilution d'un concentré d'agent de poteyage dans un fluide porteur. Ledit concentré peut être une « suspension mère », une solution concentrée ou un mélange de ceux-ci. Ledit concentré est avantageusement choisi parmi les suspensions concentrées de graphite, de nitrure de bore, de silice colloïdale, de magnésie, de produits organiques (tels que des huiles organiques ou des polyesters) ou un mélange de ceux-ci. Typiquement, on peut utiliser une suspension mère qui est un concentré de particules de graphite en suspension dans un gel, avec une proportion de graphite typiquement comprise entre 20 et 30 % en poids. Le fluide porteur est alors généralement de l'eau. La proportion de suspension mère ajoutée au fluide porteur est typiquement comprise entre 1 et 8 %.Preferably, the adjustment of the composition comprises a dilution of a concentrate of potting agent in a carrier fluid. Said concentrate can be a "mother suspension", a concentrated solution or a mixture thereof. Said concentrate is advantageously chosen from concentrated suspensions of graphite, boron nitride, colloidal silica, magnesia, organic products (such as organic oils or polyesters) or a mixture of these. Typically, one can use a mother suspension which is a concentrate of graphite particles suspended in a gel, with a proportion of graphite typically between 20 and 30% by weight. The carrier fluid is then generally water. The proportion of mother suspension added to the carrier fluid is typically between 1 and 8%.
En pratique, il peut être avantageux que le procédé selon l'invention comporte également un ajustement du débit de produit de poteyage de manière à obtenir une stabilité du jet dans le temps, en particulier entre le moment où les pistolets sont ajustés par rapport aux cylindres, hors coulée, et pendant la coulée.In practice, it may be advantageous that the method according to the invention also comprises an adjustment of the flow rate of the coating product so as to obtain a stability of the jet over time, in particular between the moment when the guns are adjusted relative to the cylinders , outside casting, and during casting.
L'ajustement de la composition peut être effectué rétroactivement en fonction de mesures effectuées sur la machine de coulée (1) (typiquement à l'aide d'une boucle de régulation) et/ou de manière automatisée. Lesdites mesures comprennent typiquement des mesures choisies parmi les mesures optique, laser, infrarouge, de vibrations ou de tension mécanique. Par exemple, la quantité d'agent de poteyage présente en surface (10) des cylindres peut être déterminée à l'aide d'un détecteur (tel qu'un détecteur optique, un système laser, une caméra ou un détecteur infrarouge) qui produit un signal qui peut être utilisé en rétroaction pour réguler la composition du produit de poteyage. Ledit ajustement de la composition peut alors correspondre à une régulation. Le procédé de l'invention peut être compris dans un procédé de régulation d'une machine de coulée continue entre cylindres.The adjustment of the composition can be carried out retroactively as a function of measurements carried out on the casting machine (1) (typically using a control loop) and / or in an automated manner. Said measurements typically include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements. For example, the amount of potting agent present on the surface (10) of the cylinders can be determined using a detector (such as an optical detector, a laser system, a camera or an infrared detector) which produces a signal which can be used in feedback to regulate the composition of the poteyage product. Said adjustment of the composition can then correspond to regulation. The process of the invention can be included in a process for regulating a continuous casting machine between rolls.
Selon l'invention, le dispositif de poteyage d'un cylindre (1A, IB), qui est apte à être utilisé sur une machine de coulée continue entre cylindres, comprend des moyens d'enduction (5, 51, 52, 6, 61, 62, 7, 8, 20, 21) pour appliquer au moins un produit de poteyage (24) sur lesdits cylindres et est caractérisé en ce qu'il comprend des moyens (30 à 41) pour ajuster la composition du produit de poteyage en cours d'application sur lesdits cylindres.According to the invention, the device for poteying a cylinder (1A, IB), which is suitable for use on a continuous casting machine between cylinders, comprises coating means (5, 51, 52, 6, 61 , 62, 7, 8, 20, 21) for applying at least one coating product (24) to said cylinders and is characterized in that it comprises means (30 to 41) for adjusting the composition of the coating product in course of application on said cylinders.
Le dispositif de poteyage selon l'invention est apte à mettre en oeuvre le procédé de poteyage de l'invention.The coating device according to the invention is capable of implementing the coating method of the invention.
Les moyens d'enduction comprennent avantageusement des moyens (20) pour contrôler le débit des moyens de projection (5, 51, 52), tels qu'une pompe volumétrique.The coating means advantageously comprise means (20) for controlling the flow rate of the projection means (5, 51, 52), such as a positive displacement pump.
Les conduits (6, 21) peuvent être en différents matériaux compatibles avec le produit de poteyage et les conditions ambiantes d'une machine de coulée continue. Lorsque les moyens de projection sont mobiles, une partie (6) des conduits est de préférence flexible.The conduits (6, 21) can be made of different materials compatible with the coating product and the ambient conditions of a continuous casting machine. When the projection means are mobile, a part (6) of the conduits is preferably flexible.
Les moyens d'enduction peuvent être placés à différents endroits sur la périphérie des cylindres. Ils sont toutefois avantageusement placés du côté de la sortie, c'est-à- dire du côté de la bande métallique, afin de ne pas être en contact avec le métal liquide, ce qui pourrait entraîner des risques d'explosion. Dans le cas très fréquent où le produit de poteyage comporte un fluide porteur, tel que de l'eau, et un agent de poteyage solide, tel que du graphite, les moyens de poteyage selon l'invention peuvent également comprendre des moyens (38, 39), actifs ou passifs, tels qu'un agitateur (38) ou une chicane (39), pour homogénéiser le produit de poteyage. Les moyens de poteyage selon l'invention peuvent éventuellement comprendre des moyens (38) pour maintenir en suspension les particules d'agent de poteyage.The coating means can be placed at different locations on the periphery of the cylinders. They are however advantageously placed on the outlet side, that is to say on the side of the metal strip, so as not to be in contact with the liquid metal, which could lead to risks of explosion. In the very frequent case where the coating product comprises a carrier fluid, such as water, and a solid coating agent, such as graphite, the coating means according to the invention can also comprise means (38, 39), active or passive, such as an agitator (38) or a baffle (39), to homogenize the cleaning product. The coating means according to the invention may optionally include means (38) for keeping the particles of coating agent in suspension.
Dans un mode de réalisation préféré de l'invention, qui est illustré à la figure 3, lesdits moyens d'ajustement (30 à 41) de la composition du produit de poteyage comprennent un mélangeur (40), une alimentation en agent de poteyage (41), un moyen de régulation (32) de l'alimentation en agent de poteyage et une alimentation en fluide porteur (30). Le moyen de régulation (32) permet de contrôler et de réguler la quantité d'agent de poteyage qui est apportée au mélangeur (40) et appliquée sur les cylindres par les moyens d'enduction. Le moyen de régulation (32) peut comprendre, par exemple, une pompe doseuse.In a preferred embodiment of the invention, which is illustrated in FIG. 3, said means for adjusting (30 to 41) the composition of the coating product include a mixer (40), a supply of coating agent ( 41), a means of regulation (32) of the supply of potentage agent and a supply of carrier fluid (30). The regulating means (32) makes it possible to control and regulate the quantity of potetting agent which is supplied to the mixer (40) and applied to the cylinders by the coating means. The regulating means (32) may include, for example, a metering pump.
Ledit mélangeur (40) peut également être un Nenturi, un réservoir tampon ou un pot. Le mélangeur (40) est avantageusement de très faible capacité (par exemple de 1 à 2 litres), ce qui permet notamment de faire varier rapidement la concentration en agent de poteyage contenu dans le produit de poteyage. Le mélangeur (40) peut être commun à plusieurs moyens de projection.Said mixer (40) can also be a Nenturi, a buffer tank or a pot. The mixer (40) is advantageously of very low capacity (for example from 1 to 2 liters), which in particular makes it possible to quickly vary the concentration of potting agent contained in the potting product. The mixer (40) can be common to several projection means.
La figure 4 illustre deux modes de réalisation desdits moyens d'ajustement (30 à 41). Dans le mode de réalisation de la figure 4a), lesdits moyens d'ajustement (30 à 41) comprennent un réservoir (34) apte à contenir ledit concentré (35), un moyen de régulation (32) de l'alimentation en agent de poteyage, des moyens de canalisations (31, 33), une alimentation en fluide porteur (30), un réservoir tampon (36) apte à contenir le produit de poteyage (24), une zone de mélange (37) et un agitateur (38). Dans le mode de réalisation de la figure 4b), lesdits moyens d'ajustement (30 à 41) comprennent un réservoir (34) apte à contenir ledit concentré (35), un moyen de régulation (32) de l'alimentation en agent de poteyage, des moyens de canalisations (31, 33), une alimentation en fluide porteur (30), un pot (36) apte à contenir le produit de poteyage (24), une zone de mélange (37), des chicanes (39) et un agitateur (38).FIG. 4 illustrates two embodiments of said adjustment means (30 to 41). In the embodiment of FIG. 4a), said adjustment means (30 to 41) comprise a reservoir (34) capable of containing said concentrate (35), a means of regulation (32) of the supply of poteyage, piping means (31, 33), a supply of carrier fluid (30), a buffer tank (36) capable of containing the poteyage product (24), a mixing zone (37) and an agitator (38 ). In the embodiment of FIG. 4b), said adjustment means (30 to 41) comprise a reservoir (34) capable of containing said concentrate (35), a means of regulation (32) of the supply of poteyage, means of pipelines (31, 33), a supply of carrier fluid (30), a pot (36) capable of containing the cleaning product (24), a mixing zone (37), baffles (39) and an agitator (38) .
La demanderesse a eu l'idée que la dilution d'un concentré d'agent de poteyage dans un fluide porteur dans un mélangeur (40), notamment lorsque celui-ci est de faible capacité, pouvait permettre d'éviter les problèmes de sédimentation de l'agent de poteyage qui sont souvent observés avec les dispositifs connus (qui fonctionnent en général en mode « batch » en utilisant des réservoirs (22) de grande capacité, à sa voir typiquement entre 100 et 200 litres) et qui entraînent des fluctuations de la composition effective du produit de poteyage par rapport à la valeur nominale. L'utilisation d'un ou plusieurs mélangeurs (40) de faible capacité permet également de réduire leur volume et, par conséquent, la taille des installations de coulée. Elle permet également de simplifier les commandes.The Applicant has had the idea that the dilution of a concentrate of potting agent in a carrier fluid in a mixer (40), in particular when the latter is of low capacity, could make it possible to avoid the problems of sedimentation of the potting agent which are often observed with known devices (which generally operate in “batch” mode using large-capacity tanks (22), as seen typically between 100 and 200 liters) and which cause fluctuations in the actual composition of the coating product compared to the nominal value. The use of one or more mixers (40) of low capacity also makes it possible to reduce their volume and, consequently, the size of the casting installations. It also simplifies orders.
Lorsque l'agent de poteyage se présente sous la forme d'un concentré (35) apte à être dilué à l'aide du fluide porteur, l'alimentation en agent de poteyage (41) comprend avantageusement un réservoir (34), à partir duquel on peut alimenter, de manière régulée, le mélangeur (40).When the coating agent is in the form of a concentrate (35) capable of being diluted using the carrier fluid, the supply of coating agent (41) advantageously comprises a reservoir (34), starting from from which the mixer (40) can be supplied in a regulated manner.
Les moyens (30 à 41) pour ajuster la composition du produit de poteyage peuvent former un dispositif d'ajustement (42) qui est avantageusement distinct, amovible et/ou démontable, ce qui en facilite l'entretien.The means (30 to 41) for adjusting the composition of the coating product can form an adjustment device (42) which is advantageously distinct, removable and / or removable, which facilitates maintenance.
Le dispositif de poteyage de l'invention peut comprendre des moyens pour contrôler rétroactivement ledit ajustement de la composition en fonction de mesures effectuées sur ladite machine de coulée, par exemple à l'aide d'une boucle de régulation. Il peut également comprendre des moyens pour contrôler de manière automatisée ledit ajustement de la composition.The coating device of the invention can comprise means for retroactively controlling said adjustment of the composition as a function of measurements carried out on said casting machine, for example using a regulation loop. It can also include means for automatically controlling said adjustment of the composition.
Les moyens de projection (5, 51, 52) sont typiquement choisis dans le groupe comprenant des buses et des pistolets. Les moyens d'enduction peuvent inclure un seul moyen de projection (5) par cylindre (figure 1) ou plusieurs moyens de projection (51, 52) par cylindre (figures 7 et 9). Dans ce dernier cas, les moyens de projection peuvent être superposés (tel qu'illustré à la figure 7) ou répartis le long du cylindre (tel qu'illustré à la figure 9). Les moyens d'enduction peuvent également comprendre des moyens pour déplacer les moyens de projection le long du cylindre, typiquement en un mouvement d'oscillation ou en un mouvement de va-et-vient entre une extrémité (11) et l'autre (12) du cylindre.The projection means (5, 51, 52) are typically chosen from the group comprising nozzles and guns. The coating means may include a only one projection means (5) per cylinder (Figure 1) or more projection means (51, 52) per cylinder (Figures 7 and 9). In the latter case, the projection means can be superimposed (as illustrated in FIG. 7) or distributed along the cylinder (as illustrated in FIG. 9). The coating means may also include means for moving the projection means along the cylinder, typically in an oscillating movement or in a reciprocating movement between one end (11) and the other (12 ) of the cylinder.
Selon une variante avantageuse de l'invention, lesdits moyens d'enduction comprennent un moyen de projection (5) pour chaque cylindre (1A, IB) et des moyens (80 à 84) pour déplacer ledit moyen de projection (5) le long de chaque cylindre, typiquement en un mouvement de va-et-vient.According to an advantageous variant of the invention, said coating means comprise a projection means (5) for each cylinder (1A, IB) and means (80 to 84) for moving said projection means (5) along each cylinder, typically in a back and forth movement.
Selon une autre variante avantageuse de l'invention, lesdits moyens d'enduction comprennent au moins deux moyens de projection (51, 52) pour chaque cylindre (1 A, IB), lesdits moyens de projection formant un ensemble solidaire, et des moyens (80 à 84) pour déplacer chaque dit ensemble le long de chaque cylindre, typiquement en un mouvement de va-et-vient. Les moyens de projection de chaque dit ensemble sont avantageusement superposés, tel qu'illustré à la figure 7, lorsqu'on cherche à produire des bandes de grande largeur (ce qui est normalement rendu difficile par la vitesse maximale limitée des moyens de déplacement des moyens de projections).According to another advantageous variant of the invention, said coating means comprise at least two projection means (51, 52) for each cylinder (1 A, IB), said projection means forming an integral assembly, and means ( 80 to 84) to move each said together along each cylinder, typically in a reciprocating motion. The projection means of each said assembly are advantageously superimposed, as illustrated in FIG. 7, when it is sought to produce strips of large width (which is normally made difficult by the limited maximum speed of the means of displacement of the means projections).
Les moyens de déplacement (80 à 84) comprennent typiquement un support mobile ou chariot (80), un rail (81) et des moyens d'entraînement (82, 83, 84) tels qu'un moteur. De préférence, lesdits moyens de déplacement (80 à 84) permettent de déplacer lesdits moyens de projection en un mouvement de va-et-vient le long d'un axe parallèle à l'axe (A, B) du cylindre.The displacement means (80 to 84) typically comprise a mobile support or carriage (80), a rail (81) and drive means (82, 83, 84) such as a motor. Preferably, said displacement means (80 to 84) make it possible to move said projection means in a reciprocating movement along an axis parallel to the axis (A, B) of the cylinder.
Selon une autre variante avantageuse de l'invention, lesdits moyens d'enduction comprennent au moins deux moyens de projection (5) pour chaque cylindre et lesdits moyens de projection sont disposés sur une ligne sensiblement parallèle à l'axe (A, B) de chaque dit cylindre (1A, IB). Les moyens de projection sont typiquement équidistants.According to another advantageous variant of the invention, said coating means comprise at least two projection means (5) for each cylinder and said projection means are arranged on a line substantially parallel to the axis (A, B) of each said cylinder (1A, IB). The projection means are typically equidistant.
L'orientation des moyens de projection peut être fixe ou variable. Le dispositif selon l'invention peut également comporter des moyens pour faire osciller au moins un des moyens de projection par rapport à un axe déterminé, ce qui permet d'augmenter la surface d'impact du moyen de projection et, éventuellement, d'en diminuer le nombre. L'axe d'oscillation est typiquement vertical.The orientation of the projection means can be fixed or variable. The device according to the invention may also include means for oscillating at least one of the projection means with respect to a determined axis, which makes it possible to increase the impact surface of the projection means and, optionally, to decrease the number. The axis of oscillation is typically vertical.
L'invention est particulièrement avantageuse dans le cas où on utilise au moins deux moyens de projection par cylindre. En effet, dans de tels cas, le recouvrement des cônes de projection (9, 91, 92) et des surfaces d'impact (100, 101, 102) peut entraîner d'importantes variations de la répartition de l'agent de poteyage totale des multiples moyens de projection. Par exemple, tel qu'illustré schématiquement à la figure 5, où D représente la densité surfacique d'agent de poteyage, la surface d'impact totale de deux moyens de projection juxtaposés peut subir non seulement des variations radiales de la densité, comme c'est le cas d'un seul moyen de projection, mais aussi des variations très importantes de la densité dans la zone de contact entre les cônes de projection et les surfaces d'impact, même si le poteyage peut être proche de la valeur nominale N dans les zones S où les surfaces d'impact ne se recouvrent pas. La figure 5a) correspond au cas où les deux jets forment un angle relativement fermé par rapport à la valeur optimale souhaitée ; le recouvrement entre les cônes de projection et les deux surfaces d'impact est dans ce cas très faible ou nul, ce qui conduit à des zones de sous-poteyage E par rapport à la valeur nominale N. La figure 5b) correspond au cas où les deux jets forment un angle relativement ouvert par rapport à la valeur optimale souhaitée ; le recouvrement entre les cônes de projection et les deux surfaces d'impact est dans ce cas non négligeable, voire important, ce qui conduit à des zones de sur-poteyage R par rapport à la valeur nominale N. La figure 6 montre qu'un effet similaire peut se produire même si les zones de recouvrement entre les surfaces d'impact sont très importantes. Dans ce dernier cas, le quantité de poteyage appliquée dans certaines zones peut fluctuer de manière très importante, passant d'un sous-poteyage dans certaines zones T lorsque l'angle des jets est relativement fermé par rapport à la valeur optimale souhaitée (figure 6a) à un sur-poteyage dans les mêmes zones T lorsque l'angle des jets est relativement ouvert (figure 6b).The invention is particularly advantageous in the case where at least two projection means are used per cylinder. In fact, in such cases, the overlap of the projection cones (9, 91, 92) and the impact surfaces (100, 101, 102) can cause significant variations in the distribution of the total coating agent. multiple means of projection. For example, as illustrated diagrammatically in FIG. 5, where D represents the surface density of the coating agent, the total impact surface of two juxtaposed projection means can undergo not only radial variations in density, as c is the case of a single projection means, but also very large variations in density in the contact zone between the projection cones and the impact surfaces, even if the coating may be close to the nominal value N in S zones where the impact surfaces do not overlap. FIG. 5a) corresponds to the case where the two jets form a relatively closed angle with respect to the desired optimal value; the overlap between the projection cones and the two impact surfaces is in this case very low or zero, which leads to underpotting areas E with respect to the nominal value N. FIG. 5b) corresponds to the case where the two jets form a relatively open angle with respect to the desired optimal value; the overlap between the projection cones and the two impact surfaces is in this case not insignificant, or even significant, which leads to overpotting areas R with respect to the nominal value N. FIG. 6 shows that a similar effect can occur even if the overlap areas between the impact surfaces are very large. In the latter case, the amount of coating applied in certain zones can fluctuate very significantly, passing from under-coating in certain zones T when the angle of the jets is relatively closed with respect to the desired optimal value (FIG. 6a) to an overpotting in the same zones T when the angle of the jets is relatively open (FIG. 6b).
La machine (1) de coulée continue entre cylindres selon l'invention peut comprendre au moins un détecteur pour déterminer la quantité d'agent de poteyage présente en surface (10) des cylindres qui produit un signal apte à être utilisé en rétroaction pour ajuster de la composition du produit de poteyage. Ledit détecteur est typiquement choisi parmi les détecteurs optiques, les systèmes lasers, les caméras, les détecteurs infrarouge, les détecteurs de vibration et les détecteurs de tension mécanique.The machine (1) for continuous casting between cylinders according to the invention can comprise at least one detector for determining the quantity of potentage agent present on the surface (10) of the cylinders which produces a signal suitable for being used in feedback to adjust the the composition of the poteyage product. Said detector is typically chosen from optical detectors, laser systems, cameras, infrared detectors, vibration detectors and mechanical tension detectors.
Dans le procédé de régulation selon l'invention, ledit ajustement peut être effectué en fonction des conditions de fonctionnement de ladite machine (1). Il peut également être effectué rétroactivement en fonction de mesures effectuées sur ladite machine de coulée, par exemple à l'aide d'une boucle de régulation. Lesdites mesures peuvent comprendre des mesures choisies parmi les mesures optique, laser, infrarouge, de vibrations ou de tension mécanique. Ledit ajustement de la composition peut aussi être effectué de manière automatisée.In the regulation method according to the invention, said adjustment can be made as a function of the operating conditions of said machine (1). It can also be carried out retroactively as a function of measurements carried out on said casting machine, for example using a regulation loop. Said measurements can include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements. Said adjustment of the composition can also be carried out automatically.
L'invention concerne surtout la production des bandes en métaux non ferreux, notamment en aluminium ou alliage d'aluminium ou en cuivre ou en alliage cuivreux.The invention relates above all to the production of strips of non-ferrous metals, in particular aluminum or aluminum alloy or copper or copper alloy.
ExemplesExamples
Des bandes en alliage d'aluminium 1100 selon la nomenclature de l'Aluminium Association, d'une épaisseur de 3 mm et d'une largeur de 1800 mm, ont été coulées selon l'invention à des vitesses atteignant 3,5 mm/min sous 1000 t/côté d'efforts de serrage, en utilisant une suspension mère de graphite à 21 % diluée dans de l'eau avec un ajustement de la proportion de graphite entre 2 % et 3 % environ. La qualité de la surface des bandes a été vérifiée par une attaque macrographique d'échantillons en pleine largeur. La demanderesse a noté une amélioration significative de la qualité de la surface des bandes, une plus grande reproductibilité de cette qualité et une productivité d'environ 10 % supérieure à celle observée pour des coulées effectuées avec un poteyage en mode batch, avec des réservoirs de grande capacité et un simple réglage du débit de produit de poteyage. Elle attribue ces améliorations à une répartition d'agent de poteyage plus uniforme et mieux contrôlée.Strips of aluminum alloy 1100 according to the nomenclature of the Aluminum Association, with a thickness of 3 mm and a width of 1800 mm, were cast according to the invention at speeds reaching 3.5 mm / min under 1000 t / side of clamping forces, using a mother suspension of 21% graphite diluted in water with an adjustment of the proportion of graphite between 2% and 3% approximately. The quality of the surface of the strips was verified by a macrographic attack on full-width samples. The Applicant has noted a significant improvement in quality of the surface of the strips, greater reproducibility of this quality and a productivity of about 10% higher than that observed for casting carried out with a batching in batch mode, with large capacity tanks and a simple adjustment of the product flow rate poteyage. She attributes these improvements to a more uniform and better controlled distribution of potting agent.
Avantages de l'inventionAdvantages of the invention
L'invention, qui peut être intégrée aux procédés et dispositifs de coulée continue entre cylindres existants, permet d'améliorer la qualité des bandes obtenues et la constance du dépôt de poteyage sur les cylindres. La qualité est notamment améliorée par le réglage des jets qui peut rester le même quel que soit le domaine de fonctionnement de la machine. Pour un régime de fonctionnement donné, la constance du dépôt permet de limiter sensiblement la quantité de produit de poteyage nécessaire pour obtenir des bandes de qualité déterminée. The invention, which can be integrated into the methods and devices for continuous casting between existing rolls, makes it possible to improve the quality of the strips obtained and the consistency of the coating on the rolls. The quality is notably improved by the adjustment of the jets which can remain the same whatever the operating range of the machine. For a given operating regime, the consistency of the deposit makes it possible to significantly limit the quantity of poteyage product necessary to obtain strips of determined quality.

Claims

REVENDICATIONS
1. Procédé de poteyage des cylindres (1A, IB) d'une machine (1) de coulée continue entre cylindres comprenant l'application d'au moins un produit de poteyage sur lesdits cylindres, ledit produit de poteyage contenant un agent de poteyage et un fluide porteur, caractérisé en ce qu'il comprend un ajustement de la composition dudit produit de poteyage en cours d'application sur lesdits cylindres.1. Method for coating the cylinders (1A, IB) of a machine (1) for continuous casting between cylinders, comprising applying at least one coating product to said cylinders, said coating product containing a coating agent and a carrier fluid, characterized in that it comprises an adjustment of the composition of said poteyage product being applied to said cylinders.
2. Procédé de poteyage selon la revendication 1, caractérisé en ce que ledit ajustement de la composition comporte un ajustement de la proportion d'agent de poteyage contenu dans le produit de poteyage.2. A coating method according to claim 1, characterized in that said adjustment of the composition comprises an adjustment of the proportion of coating agent contained in the coating product.
3. Procédé de poteyage selon la revendication 1 ou 2, caractérisé en ce qu'il comporte en outre un ajustement du débit de produit de poteyage.3. Powdering method according to claim 1 or 2, characterized in that it further comprises an adjustment of the flow rate of poteyage product.
4. Procédé de poteyage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le produit de poteyage est une suspension, une solution ou un mélange de ceux-ci.4. A coating process according to any one of claims 1 to 3, characterized in that the coating product is a suspension, a solution or a mixture thereof.
5. Procédé de poteyage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'agent de poteyage comprend du graphite.5. Potting process according to any one of claims 1 to 4, characterized in that the potting agent comprises graphite.
6. Procédé de poteyage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le fluide porteur comprend de l'eau.6. Potting process according to any one of claims 1 to 5, characterized in that the carrier fluid comprises water.
7. Procédé de poteyage selon l'une quelconque des revendications 1 à 6, caractérisé en ce que ledit ajustement de la composition comporte une dilution d'un concentré d'agent de poteyage dans ledit fluide porteur. 7. Powdering method according to any one of claims 1 to 6, characterized in that said adjustment of the composition comprises a dilution of a concentrate of potting agent in said carrier fluid.
8. Procédé de poteyage selon la revendication 7, caractérisé en ce que ledit concentré est une suspension mère, une solution concentrée ou un mélange de ceux-ci.8. Potting process according to claim 7, characterized in that said concentrate is a mother suspension, a concentrated solution or a mixture of these.
9. Procédé de poteyage selon la revendication 7 ou 8, caractérisé en ce que ledit concentré est choisi parmi les suspensions concentrées de graphite, de nitrure de bore, de silice colloïdale, de magnésie, de produits organiques ou un mélange de ceux-ci.9. Potting process according to claim 7 or 8, characterized in that said concentrate is chosen from concentrated suspensions of graphite, boron nitride, colloidal silica, magnesia, organic products or a mixture of these.
10. Procédé de poteyage selon la revendication 7 ou 8, caractérisé en ce que ledit concentré est un gel de graphite contenant entre 20 et 30 % en poids de graphite.10. Potting process according to claim 7 or 8, characterized in that said concentrate is a graphite gel containing between 20 and 30% by weight of graphite.
11. Procédé de poteyage selon l'une quelconque des revendications 1 à 10, caractérisé en ce que ledit ajustement de la composition est effectué rétroactivement en fonction de mesures effectuées sur ladite machine de coulée.11. Potting process according to any one of claims 1 to 10, characterized in that said adjustment of the composition is carried out retroactively as a function of measurements carried out on said casting machine.
12. Procédé de poteyage selon la revendication 11, caractérisé en ce qu'il comprend une boucle de régulation.12. Potting process according to claim 11, characterized in that it comprises a regulation loop.
13. Procédé de poteyage selon la revendication 11 ou 12, caractérisé en ce que lesdites mesures comprennent des mesures choisies parmi les mesures optiques, laser, infrarouge, de vibrations ou de tension mécanique.13. Potting process according to claim 11 or 12, characterized in that said measurements include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements.
14. Procédé de poteyage selon l'une quelconque des revendications 1 à 13, caractérisé en ce que ledit ajustement de la composition est effectué de manière automatisée.14. Potting process according to any one of claims 1 to 13, characterized in that said adjustment of the composition is carried out in an automated manner.
15. Procédé de coulée continue entre cylindres de bandes métalliques comprenant un procédé de poteyage selon l'une quelconque des revendications 1 à 14. 15. A method of continuous casting between rolls of metal strips comprising a coating process according to any one of claims 1 to 14.
16. Procédé de coulée continue selon la revendication 15, caractérisé en ce que lesdites bandes métalliques sont en aluminium, en alliage d'aluminium, en cuivre ou en alliage de cuivre.16. A continuous casting method according to claim 15, characterized in that said metal strips are made of aluminum, aluminum alloy, copper or copper alloy.
17. Dispositif de poteyage des cylindres (1A, IB) d'une machine (1) de coulée continue entre cylindres comprenant des moyens d'enduction (5, 51, 52, 6, 61, 62, 7, 8, 20, 21) pour appliquer au moins un produit de poteyage (24) sur lesdits cylindres, caractérisé en ce qu'il comprend des moyens (30 à 41) pour ajuster la composition dudit produit de poteyage en cours d'application sur lesdits cylindres.17. Device for poteying the cylinders (1A, IB) of a machine (1) for continuous casting between cylinders comprising coating means (5, 51, 52, 6, 61, 62, 7, 8, 20, 21 ) to apply at least one coating product (24) to said cylinders, characterized in that it comprises means (30 to 41) for adjusting the composition of said coating product during application on said cylinders.
18. Dispositif de poteyage selon la revendication 17, caractérisé en ce que lesdits moyens pour ajuster la composition comprennent un mélangeur (40), une alimentation en agent de poteyage (41), un moyen de régulation (32) de l'alimentation en agent de poteyage et une alimentation en fluide porteur (30).18. Powdering device according to claim 17, characterized in that said means for adjusting the composition comprise a mixer (40), a supply of potting agent (41), a means of regulation (32) of the supply of agent of cleaning and a supply of carrier fluid (30).
19. Dispositif de poteyage selon la revendication 18, caractérisé en ce que le moyen de régulation (32) comprend une pompe doseuse.19. Potting device according to claim 18, characterized in that the regulating means (32) comprises a metering pump.
20. Dispositif de poteyage selon la revendication 18 ou 19, caractérisé en ce que l'alimentation en agent de poteyage (41) comprend un réservoir (34) apte à contenir un concentré d'agent de poteyage (35).20. Potting device according to claim 18 or 19, characterized in that the supply of potting agent (41) comprises a reservoir (34) capable of containing a concentrate of potting agent (35).
21. Dispositif de poteyage selon l'une quelconque des revendications 17 à 20, caractérisé en ce qu'il comprend des moyens (38, 39) pour homogénéiser le produit de poteyage.21. Potting device according to any one of claims 17 to 20, characterized in that it comprises means (38, 39) for homogenizing the potting product.
22. Dispositif de poteyage selon l'une quelconque des revendications 17 à 21, caractérisé en ce que les moyens d'enduction comprennent des moyens (20) pour contrôler le débit des moyens de projection (5, 51, 52). 22. Potting device according to any one of claims 17 to 21, characterized in that the coating means comprise means (20) for controlling the flow rate of the projection means (5, 51, 52).
23. Dispositif de poteyage selon l'une quelconque des revendications 17 à 22, caractérisé en ce que lesdits moyens d'enduction comprennent un moyen de projection (5) pour chaque cylindre (1A, IB) et des moyens (80 à 84) pour déplacer ledit moyen de projection (5) le long de chaque cylindre.23. Potting device according to any one of claims 17 to 22, characterized in that said coating means comprise a projection means (5) for each cylinder (1A, IB) and means (80 to 84) for moving said projection means (5) along each cylinder.
24. Dispositif de poteyage selon l'une quelconque des revendications 17 à 22, caractérisé en ce que lesdits moyens d'enduction comprennent au moins deux moyens de projection (51, 52) pour chaque cylindre (1A, IB), lesdits moyens de projection formant un ensemble solidaire, et des moyens (80 à 84) pour déplacer chaque dit ensemble le long de chaque cylindre.24. Potting device according to any one of claims 17 to 22, characterized in that said coating means comprise at least two projection means (51, 52) for each cylinder (1A, IB), said projection means forming an integral assembly, and means (80 to 84) for moving each said assembly along each cylinder.
25. Dispositif selon la revendication 24, caractérisé en ce que les moyens de projection de chaque dit ensemble sont superposés.25. Device according to claim 24, characterized in that the projection means of each said assembly are superimposed.
26. Dispositif selon l'une quelconque des revendications 23 à 25, caractérisé en ce que lesdits moyens de déplacement (80 à 84) permettent de déplacer lesdits moyens de projection en un mouvement de va-et-vient le long d'un axe parallèle à l'axe (A, B) des cylindres.26. Device according to any one of claims 23 to 25, characterized in that said displacement means (80 to 84) make it possible to move said projection means in a reciprocating movement along a parallel axis to the axis (A, B) of the cylinders.
27. Dispositif de poteyage selon l'une quelconque des revendications 17 à 22, caractérisé en ce que lesdits moyens d'enduction comprennent au moins deux moyens de projection (5) pour chaque cylindre et en ce que lesdits moyens de projection sont disposés sur une ligne sensiblement parallèle à l'axe (A, B) de chaque dit cylindre (1 A, IB).27. Potting device according to any one of claims 17 to 22, characterized in that said coating means comprise at least two projection means (5) for each cylinder and in that said projection means are arranged on a line substantially parallel to the axis (A, B) of each said cylinder (1 A, IB).
28. Dispositif de poteyage selon l'une quelconque des revendications 17 à 27, caractérisé en ce qu'il comporte des moyens pour faire osciller au moins un des moyens de projection par rapport à un axe déterminé.28. Potting device according to any one of claims 17 to 27, characterized in that it comprises means for oscillating at least one of the projection means relative to a determined axis.
29. Dispositif de poteyage selon l'une quelconque des revendications 17 à 28, caractérisé en ce que les moyens de projection (5, 51, 52) sont choisis dans le groupe comprenant des buses et des pistolets. 29. Potting device according to any one of claims 17 to 28, characterized in that the projection means (5, 51, 52) are chosen from the group comprising nozzles and guns.
30. Dispositif de poteyage selon l'une quelconque des revendications 17 à 29, caractérisé en ce qu'il comprend des moyens pour contrôler rétroactivement ledit ajustement de la composition en fonction de mesures effectuées sur ladite machine de coulée.30. Potting device according to any one of claims 17 to 29, characterized in that it comprises means for retroactively controlling said adjustment of the composition as a function of measurements carried out on said casting machine.
31. Dispositif de poteyage selon l'une quelconque des revendications 17 à 30, caractérisé en ce qu'il comprend des moyens pour contrôler de manière automatisée ledit ajustement de la composition.31. Potting device according to any one of claims 17 to 30, characterized in that it comprises means for automatically controlling said adjustment of the composition.
32. Dispositif de poteyage selon l'une quelconque des revendications 17 à 31, caractérisé en ce que lesdits moyens (30 à 41) pour ajuster la composition du produit de poteyage peuvent former un dispositif d'ajustement (42) distinct, amovible et/ou démontable.32. poteyage device according to any one of claims 17 to 31, characterized in that said means (30 to 41) for adjusting the composition of the poteyage product can form a separate, removable and / or adjustment device (42) or removable.
33. Machine de coulée continue entre cylindres de bandes métalliques équipée d'un dispositif de poteyage selon l'une quelconque des revendications 17 à 32.33. Continuous casting machine between cylinders of metal strips equipped with a poteyage device according to any one of claims 17 to 32.
34. Machine selon la revendication 33, caractérisée en ce qu'elle comprend au moins un détecteur pour déterminer la quantité d'agent de poteyage présente en surface (10) des cylindres qui produit un signal apte à être utilisé en rétroaction pour ajuster de la composition du produit de poteyage.34. Machine according to claim 33, characterized in that it comprises at least one detector for determining the quantity of potting agent present on the surface (10) of the cylinders which produces a signal suitable for being used in feedback to adjust the composition of poteyage product.
35. Machine selon la revendication 34, caractérisée en ce que ledit détecteur est choisi parmi les détecteurs optiques, les systèmes lasers, les caméras, les détecteurs infrarouge, les détecteurs de vibration et les détecteurs de tension mécanique.35. Machine according to claim 34, characterized in that said detector is chosen from optical detectors, laser systems, cameras, infrared detectors, vibration detectors and mechanical tension detectors.
36. Procédé de régulation d'une machine (1) de coulée continue entre cylindres de bandes métalliques comprenant l'application d'au moins un produit de poteyage sur lesdits cylindres, ledit produit de poteyage contenant un agent de poteyage et un fluide porteur, caractérisé en ce qu'il comprend un ajustement de la composition dudit produit de poteyage en cours d'application sur lesdits cylindres.36. Method for regulating a machine (1) for continuous casting between cylinders of metal strips comprising the application of at least one coating product to said cylinders, said coating product containing a coating agent and a carrier fluid, characterized in that it includes an adjustment of the composition of said poteyage product being applied to said cylinders.
37. Procédé de régulation selon la revendication 36, caractérisé en ce que ledit ajustement est effectué en fonction des conditions de fonctionnement de ladite machine (1).37. A method of regulation according to claim 36, characterized in that said adjustment is made according to the operating conditions of said machine (1).
38. Procédé de régulation selon la revendication 36 ou 37, caractérisé en ce que ledit ajustement de la composition est effectué rétroactivement en fonction de mesures effectuées sur ladite machine de coulée.38. A method of regulation according to claim 36 or 37, characterized in that said adjustment of the composition is carried out retroactively as a function of measurements carried out on said casting machine.
39. Procédé de régulation selon la revendication 38, caractérisé en ce qu'il comprend une boucle de régulation.39. Method of regulation according to claim 38, characterized in that it comprises a regulation loop.
40. Procédé de régulation selon la revendication 38 ou 39, caractérisé en ce que lesdites mesures comprennent des mesures choisies parmi les mesures optique, laser, infrarouge, de vibrations ou de tension mécanique.40. A method of regulation according to claim 38 or 39, characterized in that said measurements include measurements chosen from optical, laser, infrared, vibration or mechanical tension measurements.
41. Procédé de régulation selon l'une quelconque des revendications 36 à 40, caractérisé en ce que ledit ajustement de la composition est effectué de manière automatisée. 41. A method of regulation according to any one of claims 36 to 40, characterized in that said adjustment of the composition is carried out automatically.
EP02703655A 2001-02-08 2002-02-05 Method and device for refractory dressing of rolls of a metal strip continuous casting machine Expired - Lifetime EP1358029B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0101724A FR2820350B1 (en) 2001-02-08 2001-02-08 METHOD AND DEVICE FOR POTTING THE CYLINDERS OF A CONTINUOUS CASTING MACHINE FOR METAL STRIPS
FR0101724 2001-02-08
PCT/FR2002/000441 WO2002062508A1 (en) 2001-02-08 2002-02-05 Method and device for refractory dressing of rolls of a metal strip continuous casting machine

Publications (2)

Publication Number Publication Date
EP1358029A1 true EP1358029A1 (en) 2003-11-05
EP1358029B1 EP1358029B1 (en) 2004-06-02

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EP02703655A Expired - Lifetime EP1358029B1 (en) 2001-02-08 2002-02-05 Method and device for refractory dressing of rolls of a metal strip continuous casting machine

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EP (1) EP1358029B1 (en)
JP (1) JP2004532127A (en)
CN (1) CN1263567C (en)
AT (1) ATE268238T1 (en)
BR (1) BR0207027A (en)
CA (1) CA2438038C (en)
CZ (1) CZ296422B6 (en)
DE (1) DE60200587T2 (en)
ES (1) ES2219630T3 (en)
FR (1) FR2820350B1 (en)
IL (2) IL156732A0 (en)
MX (1) MXPA03006997A (en)
NO (1) NO20033477L (en)
RU (1) RU2288068C2 (en)
TR (1) TR200401358T4 (en)
WO (1) WO2002062508A1 (en)

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CN1911545B (en) * 2006-08-18 2012-05-23 上海诸光机械有限公司 Technological lubricating system of hot mill steel plate continuous milling machine
CN101367117B (en) * 2007-08-17 2010-12-15 宝山钢铁股份有限公司 On-line surface treating method for crystallization roller of thin belt continuous casting process
CN103084394B (en) * 2013-02-27 2015-03-18 云南铝业股份有限公司 Method for removing tiger-stripes of cast rolling plate surface
CN108103302A (en) * 2018-01-09 2018-06-01 常州艾柯轧辊有限公司 A kind of cold roll whole heat treatment process
CN110904292B (en) * 2019-12-05 2020-10-02 四川大学 Intelligent paste wiping operation device
CN111496201A (en) * 2020-05-26 2020-08-07 武汉钢铁有限公司 Anti-sticking coating for copper plate of continuous casting crystallizer and continuous casting crystallizer with anti-sticking coating
CN111761036B (en) * 2020-07-08 2022-03-01 甘肃东兴铝业有限公司 Casting and rolling method for 6xxx series aluminum alloy plate for automobile
DE102021100216A1 (en) * 2021-01-08 2022-07-14 Universität Kassel, Körperschaft des öffentlichen Rechts Method for monitoring the coverage of a mold surface of a mold with a process aid in a casting process

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CZ296422B6 (en) 2006-03-15
ATE268238T1 (en) 2004-06-15
MXPA03006997A (en) 2003-11-18
NO20033477D0 (en) 2003-08-05
CN1491139A (en) 2004-04-21
EP1358029B1 (en) 2004-06-02
CZ20032247A3 (en) 2004-02-18
DE60200587T2 (en) 2009-10-01
ES2219630T3 (en) 2004-12-01
CN1263567C (en) 2006-07-12
CA2438038C (en) 2009-07-21
BR0207027A (en) 2004-02-17
TR200401358T4 (en) 2004-07-21
IL156732A (en) 2008-06-05
NO20033477L (en) 2003-08-05
DE60200587D1 (en) 2004-07-08
IL156732A0 (en) 2004-02-08
RU2288068C2 (en) 2006-11-27
WO2002062508A1 (en) 2002-08-15
FR2820350A1 (en) 2002-08-09
CA2438038A1 (en) 2002-08-15
RU2003127068A (en) 2005-03-10
FR2820350B1 (en) 2003-03-07
JP2004532127A (en) 2004-10-21

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