EP1334217B1 - Procede et installation de revetement au trempe d'une bande metallique - Google Patents
Procede et installation de revetement au trempe d'une bande metallique Download PDFInfo
- Publication number
- EP1334217B1 EP1334217B1 EP01993715A EP01993715A EP1334217B1 EP 1334217 B1 EP1334217 B1 EP 1334217B1 EP 01993715 A EP01993715 A EP 01993715A EP 01993715 A EP01993715 A EP 01993715A EP 1334217 B1 EP1334217 B1 EP 1334217B1
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- EP
- European Patent Office
- Prior art keywords
- compartment
- metal
- liquid
- plant according
- bath
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
- C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
- C23C2/00362—Details related to seals, e.g. magnetic means
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
- C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
- C23C2/523—Bath level or amount
Definitions
- the present invention relates to a method and an installation for continuous hot-dip coating of a metal strip, in particular of a steel strip.
- steel sheets coated with a protective layer for example against corrosion and most often coated with a layer of zinc.
- This type of sheet is used in various industries to make all kinds of parts and in particular appearance parts.
- Corrosion resistance of the parts thus coated is ensured by zinc, the thickness of which is produced most often by pneumatic spinning.
- the adhesion of zinc to the steel strip is ensured by the alloy layer intermetallic cited above.
- this strip of steel Before the steel strip passes through the molten metal bath, this strip of steel first circulates in an annealing furnace under an atmosphere reducing in order to recrystallize it after the significant work hardening linked to the operation cold rolling, and to prepare its surface chemical state in order to favor the chemical reactions necessary for the actual quenching operation.
- the steel strip is brought to around 650 to 900 ° C depending on the grade during time required for recrystallization and surface preparation. Then she is cooled to a temperature close to that of the molten metal bath using exchangers.
- the steel strip After passing through the annealing furnace, the steel strip scrolls in a sheath also called “bell drop” or “horn” in an atmosphere protective against steel and is immersed in the molten metal bath.
- a sheath also called "bell drop” or “horn” in an atmosphere protective against steel and is immersed in the molten metal bath.
- the lower part of the sheath is immersed in the metal bath to determine, with the surface of said bath and inside this sheath, a liquid gasket which is crossed by the steel strip as it travels in said sheath.
- the steel strip is deflected by a roller immersed in the metal bath and it comes out of this metal bath, then passes through wringing means used to regulate the thickness of the coating of liquid metal on this strip steel.
- the surface of the liquid seal inside the sheath is generally covered with zinc oxide, from the reaction between the atmosphere inside this sheath and the zinc liquid seal and solid mattes from the dissolution reaction of the steel strip.
- the coated steel strip has appearance defects which are amplified or even revealed during the zinc wringing operation.
- the intruded particles are retained by the spinning jets pneumatic before being ejected or disaggregated, creating streaks under thickness in liquid zinc a few millimeters long a few centimeters.
- a first solution to avoid these drawbacks is to clean the surface of the liquid seal by pumping zinc oxides and mattes coming from the bath.
- a second solution consists in reducing the surface of the liquid seal at the point of passage of the steel strip by placing a sheet metal plate or ceramic at this liquid joint to keep away from the strip part of the particles present on the surface and obtain a self-cleaning of the liquid joint by this strip.
- This arrangement does not allow all the particles to be removed present on the surface of the liquid seal and self-cleaning is all the more important that the surface of the liquid seal is reduced, which is incompatible with industrial operating conditions.
- Another solution is to add a frame to the surface of the liquid seal in the sheath and surrounding the steel strip.
- the zinc vapors at the liquid joint will condense on the walls of the frame and at the slightest eddy caused by vibrations or the thermal folds of the immersion tape, the walls of the frame will become fouled and thus become storage areas for foreign bodies.
- the renewal is carried out by the introduction of liquid zinc pumped into the bath near the immersion zone of the steel strip.
- the piping ensuring the renewal of liquid zinc may cause scratches on the steel strip before immersion and it is itself a source of defects by accumulation of zinc vapors condensed above the liquid seal.
- This process also requires a very high pumping rate to maintain a permanent spill effect as long as the box surrounding the band in the volume of the bath above the bottom roller can be hermetically sealed.
- the object of the invention is to propose a method and an installation continuous galvanizing of a metal strip which prevents disadvantages previously mentioned and to achieve the very low density of defects satisfying the requirements of customers wanting flawless surfaces appearance.
- the invention therefore relates to a dip coating process continuous metal strip in a tank containing a metal bath liquid, process in which we continuously scroll, under a protective atmosphere, the metal strip in a sheath whose lower part is immersed in the liquid metal bath to determine with the surface of said bath and inside from this sheath, a liquid seal, we deflect the metal strip on a deflector roller placed in the metal bath, and the strip is wrung metal coated at the outlet of the metal bath, characterized in that one realizes a natural flow of the liquid metal from the surface of the liquid seal in a discharge compartment formed in said sheath and comprising a wall internal extending the sheath to its lower part and at least one look of the side of the strip located on the side of the deflector roller, the upper edge of the compartment being positioned below said surface and the height of fall liquid metal in this compartment being determined to prevent the rise particles of metal oxide and intermetallic compounds to counter flow of the liquid metal flow and the metal level is maintained liquid in said compartment at a level below the seal surface liquid.
- the strip of steel 1 passes through an annealing furnace, not shown, under a reducing atmosphere with a view to recrystallizing it after the significant work hardening linked to rolling at cold, and to prepare its surface chemical state in order to favor the reactions necessary for the galvanizing operation.
- the steel strip is brought to a temperature for example between 650 and 900 ° C.
- the steel strip 1 passes through a galvanizing installation shown in Fig. 1 and designated by the reference general 10.
- This installation 10 comprises a tank 11 containing a bath 12 liquid zinc which contains chemicals such as aluminum, iron and possible additives such as lead, antimony, in particular.
- the temperature of this liquid zinc bath is of the order of 460 ° C.
- the steel strip 1 is cooled to a temperature close to that of the liquid zinc bath using exchangers and is then immersed in the bath 12 of liquid zinc.
- the galvanizing installation 10 comprises a sheath 13 inside which the steel strip 1 travels under an atmosphere protective with respect to steel.
- This sheath 13 also called “bell descent” or “trompe” presents, in the embodiment shown in the figures, a rectangular cross section.
- the lower part 13a of the sheath 13 is immersed in the bath of zinc 12 so as to determine with the surface of said bath 12 and within this sheath 13, a liquid seal 14.
- the steel strip 1 when immersed in the zinc bath 12 liquid, crosses the surface of the liquid seal 14 in the lower part 13a of the sheath 13.
- the steel strip 1 is deflected by a roller 15 commonly called bottom roller and placed in the zinc bath 12. At the end of this bath of zinc 12, the coated steel strip 1 passes through wringing means 16 which are for example constituted by nozzles 16a for air projection and which are directed towards each side of the steel strip 1 to regulate the thickness of the coating liquid zinc.
- the lower part 13a of the sheath 13 is extended, on the side opposite the face of the strip 1 located on the side of the deflection roller 15, by an internal wall 20 directed towards the surface of the liquid seal 14 and which cleans with said lower part 13a of the sheath 13, a compartment 25 for discharging the liquid zinc, as will be seen later.
- the upper edge 21 of the internal wall 20 is positioned below of the surface of the liquid seal 14 and the compartment 25 is provided with means for maintaining the level of liquid zinc in said compartment at a level below the surface of the liquid seal 14 to produce a flow natural liquid zinc from this surface of said liquid seal 14 towards this compartment 25.
- the lower part 13a of the sheath 13 located opposite of the face of the strip 1 placed opposite the deflector roller 15, is extended by an internal wall 26 directed towards the surface of the liquid seal 14 and providing with said lower part 13a a sealed storage compartment 29 particles, in particular zinc oxide particles.
- the upper edge 27 of the internal wall 26 is positioned above of the surface of the liquid seal 14.
- the drop height of the liquid metal in the compartment spill 25 is determined to prevent the rise of particles of metal oxide and intermetallic compounds against the flow liquid metal and this height is greater than 50mm and preferably 100mm
- the internal walls 20 and 26 have a part lower flared towards the bottom of the tank 11.
- the internal walls 20 and 26 of the compartments 25 and 29 are made of stainless steel and have a thickness included for example between 10 and 20mm.
- the upper edge 21 of the internal wall 20 is straight and preferably tapered.
- the upper edge 21 of the internal wall 20 of the discharge compartment 25 comprises, in the longitudinal direction, a succession of hollows 22 and projections 23.
- the recesses 22 and the projections 23 have the shape of arcs of a circle and the amplitude "a" between said recesses and said projections is preferably comprised between 5 and 10mm.
- the distance "d" between the recesses 22 and the projections 23 is for example of the order of 150mm.
- the upper edge 21 of the internal wall 20 is preferably tapered.
- the means of maintaining the level of liquid zinc in the discharge compartment 25 are formed by a pump 30 connected to the suction side to said compartment 25 by a connecting duct 31 and provided with discharge side of an evacuation duct 32 in the volume of the bath 12 of the zinc removed.
- the installation also includes display means the level of liquid zinc in the spill compartment 25 or all another way to view the level of liquid zinc.
- these display means are formed by a reservoir 35 disposed outside the sheath 13 and connected at the base of the discharge compartment 25 by a connecting pipe 36.
- connection point of the pump 30 on the discharge compartment 25 is located above the point connecting the reservoir 35 to said compartment 25.
- the external reservoir 35 enables the level of the spill compartment 25 outside the lower part 13a of the sheath 13 in a more favorable environment so as to easily detect this level.
- the reservoir 35 can be equipped with a level detector of liquid zinc, such as a contactor supplying a warning light, a radar or a laser beam.
- the sheath 13 is extended at its lower part and opposite each lateral edge of the strip of steel 1, by an internal wall 40 directed towards the surface of the liquid seal 14 and the upper edge 41 of which is positioned below the said joint surface liquid 14.
- Each internal wall 41 household, with the lower part of the sheath 13, a pouring compartment 42 for liquid zinc.
- the steel strip 1 enters the bath zinc 12 through the sheath 13 and the liquid seal 14 and this strip causes zinc oxides and mattes from the bath creating appearance defects in the coating.
- the surface of the liquid seal 14 is reduced thanks to the internal walls 20 and 26 and the insulated liquid seal surface 14 between said walls 20 and 26 flows into the discharge compartment 25 passing over the upper edge 21 of the internal wall 20 of said compartment 25.
- Oxide particles and mattes or other particles which float on the surface of the liquid seal 14 and which are the source of appearance defects, are entrained in the spill compartment 25 and the liquid zinc contained in this compartment 25 is pumped in order to maintain a sufficient level below to allow the natural flow of zinc from the surface of the liquid seal 14 towards this compartment 25.
- the steel strip 1 at immersion scrolls through the surface of the liquid seal 14 constantly cleaned and comes out of the zinc 12 with a minimum of defects.
- the sealed compartment 29 serves as a receptacle for the oxides of zinc or other particles that may come from the inclined bottom wall of the sheath and allows these oxides to be stored in order to protect the steel strip 1.
- the external reservoir 35 makes it possible to detect the level of liquid zinc in the spill compartment 25 and adjust this level so to keep it below the level of the bath 12 by acting for example on the introduction of zinc ingots into the tank 11.
- the installation according to the invention the density of defects on the coated surfaces of the steel strip is considerably reduced and the quality appearance thus obtained from this coating is suitable for the criteria required by customers wanting parts whose surfaces have no appearance defects.
- the invention applies to any metallic coating by dipping.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
- Electroplating Methods And Accessories (AREA)
Description
- une cuve contenant un bain de métal liquide,
- une gaine de défilement de la bande métallique sous atmosphère protectrice et dont la partie inférieure est immergée dans le bain de métal liquide pour déterminer avec la surface dudit bain et à l'intérieur de cette gaine, un joint d'étanchéité liquide,
- un rouleau déflecteur de la bande métallique disposé dans le bain de métal, et
- des moyens d'essorage de la bande métallique revêtue à la sortie du bain de métal,
- la gaine est prolongée, à sa partie inférieure et en regard de la face de la bande située du côté opposé au rouleau déflecteur, par une paroi interne dirigée vers la surface du joint liquide dont l'arête supérieure est positionnée au-dessus de ladité surface et formant un compartiment étanche de stockage des particules d'oxyde de métal,
- la hauteur de chute du métal liquide dans le compartiment de déversement est supérieure à 100mm,
- la paroi interne de chaque compartiment présente une partie inférieure évasée vers le fond de la cuve et une partie supérieure parallèle à la bande métallique,
- les moyens de maintien du niveau de métal liquide dans le compartiment de déversement sont formés par une pompe raccordée du côté aspiration audit compartiment par un conduit de liaison et munie du côté refoulement d'un conduit d'évacuation dans le volume du bain du métal liquide prélevé,
- l'installation comporte des moyens de visualisation du niveau de métal liquide dans le compartiment de déversement,
- les moyens de visualisation sont formés par un réservoir disposé à l'extérieur de la gaine et reliée à la base du compartiment de déversement par une tuyauterie du raccordement,
- la gaine est prolongée, à sa partie inférieure et en regard de chaque bord latéral de la bande métallique, par une paroi interne dirigée vers la surface du joint liquide dont l'arête supérieure est positionnée au-dessous de ladite surface et formant un compartiment de déversement du métal liquide.
- la Fig. 1 est une vue schématique en élévation d'une installation de revêtement au trempé en continu, conforme à l'invention,
- la Fig. 2 est une vue en coupe de la gaine selon la ligne 2-2 de la Fig. 1,
- la Fig. 3 est une vue schématique en élévation d'un premier mode de réalisation de l'arête supérieure du compartiment de déversement de l'installation conforme à l'invention,
- la Fig. 4 est une vue schématique en élévation d'un second mode de réalisation de l'arête supérieure du compartiment de déversement de l'installation conforme à l'invention,
- la Fig. 5 est une vue schématique en coupe transversale d'une variante de la gaine de l'installation conforme à l'invention.
Claims (19)
- Procédé de revêtement au trempé en continu d'une bande métallique (1) dans une cuve (11) contenant un bain de métal liquide, procédé dans lequel on fait défiler en continu, sous atmosphère protectrice, la bande métallique (1) dans une gaine (13) dont la partie inférieure (13a) est immergée dans le bain de métal (12) liquide pour déterminer avec la surface dudit bain et à l'intérieur de cette gaine (13), un joint d'étanchéité (14) liquide, on dévie la bande métallique (1) sur un rouleau déflecteur disposé dans le bain de métal (12), et on essore la bande métallique (1) revêtue à la sortie du bain de métal (12), caractérisé en ce que on réalise un écoulement naturel du métal liquide de la surface du joint liquide (14) dans un compartiment de déversement (25) ménagé dans ladite gaine (13) et comportant une paroi interne prolongeant la gaine (13) à sa partie inférieure et au moins en regard de la face de la bande (1) située du côté du rouleau (15) déflecteur, l'arête supérieure (21) du compartiment (25) étant positionnée au-dessous de ladite surface et la hauteur de chute du métal liquide dans ce compartiment (25) étant déterminée pour empêcher la remontée des particules d'oxyde de métal et de composés intermétalliques à contre-courant de l'écoulement du métal liquide et on maintient le niveau de métal liquide dans ledit compartiment (25) à un niveau au-dessous de la surface du joint liquide (14).
- Installation de revêtement au trempé en continu d'une bande métallique (1), du type comprenant :une cuve (11 ) contenant un bain de métal (12) liquide,une gaine (13) de défilement de la bande métallique (1) sous atmosphère protectrice et dont la partie inférieure (13a) est immergée dans le bain de métal liquide (12) pour déterminer avec la surface dudit bain (12) et à l'intérieur de cette gaine (13), un joint d'étanchéité (14) liquide,un rouleau (15) déflecteur de la bande métallique (1) disposé dans le bain de métal (12), etdes moyens (16) d'essorage de la bande métallique (1) revêtue à la sortie du bain de métal (12),
- Installation selon la revendication 2, caractérisé en ce que la gaine (13) est prolongée, à sa partie inférieure (13a) et en regard de la face de la bande (1) située du côté opposé au rouleau déflecteur (15), par une paroi interne (26) dirigée vers la surface du joint liquide (14) dont l'arête supérieure (27) est positionnée au-dessus de ladite surface et formant un compartiment étanche (29) de stockage des particules d'oxydes de métal.
- Installation selon la revendication 1 ou 2, caractérisée en ce que la paroi interne (20 ; 26) de chaque compartiment (25 ; 29) présente une partie inférieure évasée vers le fond de la cuve (11) et une partie supérieure parallèle à la bande métallique (1).
- Installation selon la revendication 2 ou 4, caractérisée en ce que la hauteur de chute du métal liquide dans le compartiment de déversement (25) est supérieure à 100mm.
- Installation selon la revendication 2 ou 4, caractérisée en ce que l'arête supérieure (21) de la paroi interne (20) du compartiment de déversement (25) est rectiligne.
- Installation selon la revendication 2 ou 4, caractérisée en ce que l'arête supérieure (21) de la paroi interne (20) du compartiment de déversement (25) comporte, dans le sens longitudinal, une succession de creux (22) et de saillies (23).
- Installation selon la revendication 7, caractérisée en ce que les creux (22) et les saillies (23) ont la forme d'arcs de cercle.
- Installation selon la revendication 7 ou 8, caractérisée en ce que l'amplitude entre les creux (22) et les saillies (23) est comprise entre 5 et 10mm.
- Installation selon la revendication 7 ou 8, caractérisée en ce que la distance entre les creux (22) et les saillies (23) est de l'ordre de 150mm.
- Installation selon la revendication 6 ou 7, caractérisée en ce que l'arête supérieure (21) de la paroi interne (20) du compartiment de déversement (25) est effilée.
- Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que la paroi interne ( 20 ; 26) de chaque compartiment (25 ; 29) est en acier inoxydable et a une épaisseur comprise par exemple entre 10 et 20mm.
- Installation selon la revendication 2, caractérisée en ce que les moyens de maintien du niveau de métal liquide dans le compartiment de déversement (25) sont formés par une pompe (30) raccordée du côté aspiration audit compartiment (25) par un conduit de liaison (31) et munie du côté refoulement d'un conduit d'évacuation (32) dans le volume du bain (12) du métal prélevé.
- Installation selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte des moyens (35) de visualisation du niveau de métal liquide dans le compartiment de déversement (25).
- Installation selon la revendication 14, caractérisée en ce que les moyens de visualisation sont formés par un réservoir (35) disposé à l'extérieur de la gaine (13) et relié à la base du compartiment du déversement (25) par une tuyauterie de raccordement (36).
- Installation selon les revendications 13 et 15, caractérisée en ce que le point de raccordement de la pompe (30) sur le compartiment de déversement (25) est situé au-dessus du point de raccordement du réservoir (35) sur ledit compartiment (25).
- Installation selon la revendication 15, caractérisée en ce que le réservoir (35) forme une capacité tampon de métal liquide pour le compartiment de déversement (25).
- Installation selon la revendication 15, caractérisée en ce que le réservoir (35) est équipé d'un détecteur de niveau de métal liquide.
- Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que la gaine (13) est prolongée, à sa partie inférieure (13a) et en regard de chaque bord latéral de la bande métallique (1), par une paroi interne (40) dirigée vers la surface du joint liquide (14) dont l'arête supérieure (41) est positionnée au-dessous de ladite surface et formant un compartiment de déversement (42) du métal liquide.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0014480 | 2000-11-10 | ||
FR0014480A FR2816639B1 (fr) | 2000-11-10 | 2000-11-10 | Installation de revetement au trempe d'une bande metallique |
PCT/FR2001/003455 WO2002038824A1 (fr) | 2000-11-10 | 2001-11-07 | Procede et installation de revetement au trempe d'une bande metallique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1334217A1 EP1334217A1 (fr) | 2003-08-13 |
EP1334217B1 true EP1334217B1 (fr) | 2004-06-16 |
Family
ID=8856311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01993715A Expired - Lifetime EP1334217B1 (fr) | 2000-11-10 | 2001-11-07 | Procede et installation de revetement au trempe d'une bande metallique |
Country Status (34)
Country | Link |
---|---|
US (1) | US6936307B2 (fr) |
EP (1) | EP1334217B1 (fr) |
JP (1) | JP3747199B2 (fr) |
KR (1) | KR100725557B1 (fr) |
CN (1) | CN1271234C (fr) |
AR (1) | AR034274A1 (fr) |
AT (1) | ATE269427T1 (fr) |
AU (2) | AU2002223777B2 (fr) |
BG (1) | BG64800B1 (fr) |
BR (1) | BR0100006B1 (fr) |
CA (1) | CA2428487C (fr) |
CZ (1) | CZ298795B6 (fr) |
DE (1) | DE60103925T2 (fr) |
DK (1) | DK1334217T3 (fr) |
EA (1) | EA004448B1 (fr) |
EC (1) | ECSP034594A (fr) |
EE (1) | EE04644B1 (fr) |
ES (1) | ES2223956T3 (fr) |
FR (1) | FR2816639B1 (fr) |
HR (1) | HRP20030370B1 (fr) |
HU (1) | HU226624B1 (fr) |
MA (1) | MA25923A1 (fr) |
ME (1) | ME00792B (fr) |
MX (1) | MXPA03004133A (fr) |
NO (1) | NO20032089L (fr) |
PL (1) | PL201517B1 (fr) |
PT (1) | PT1334217E (fr) |
RS (2) | RS50049B (fr) |
SK (1) | SK286793B6 (fr) |
TR (1) | TR200401449T4 (fr) |
TW (1) | TW554073B (fr) |
UA (1) | UA73220C2 (fr) |
WO (1) | WO2002038824A1 (fr) |
ZA (1) | ZA200303500B (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004024974A1 (fr) * | 2002-09-13 | 2004-03-25 | Jfe Steel Corporation | Procede et dispositif de production d'une courroie metallique revetue par immersion a chaud |
RU2344197C2 (ru) * | 2003-02-27 | 2009-01-20 | Смс Демаг Акциенгезелльшафт | Способ и устройство для нанесения покрытий погружением в расплав на металлические ленты, в частности на стальные ленты |
DE102006050681B3 (de) * | 2006-10-24 | 2007-12-27 | Gea Energietechnik Gmbh | Verfahren zur Herstellung eines Wärmetauschers |
KR101459360B1 (ko) * | 2012-12-18 | 2014-11-20 | 포스코강판 주식회사 | 도금강판의 미도금 방지장치 |
DE102013101131A1 (de) * | 2013-02-05 | 2014-08-07 | Thyssenkrupp Steel Europe Ag | Vorrichtung zum Schmelztauchbeschichten von Metallband |
CN104562088A (zh) * | 2015-01-20 | 2015-04-29 | 郑州经纬科技实业有限公司 | 电解铝阴极导电棒及其制备方法 |
WO2017187226A1 (fr) * | 2016-04-26 | 2017-11-02 | Arcelormittal | Installation de revêtement au trempé à chaud et en continu d'une bande métallique et procédé associé |
CN107447174A (zh) * | 2016-05-31 | 2017-12-08 | 宝钢新日铁汽车板有限公司 | 一种炉鼻子内的清洁系统和方法 |
CN107794478B (zh) * | 2017-11-13 | 2019-10-29 | 北京首钢冷轧薄板有限公司 | 一种应用于热镀锌炉鼻子内部液位清洁装置 |
WO2019175623A1 (fr) | 2018-03-12 | 2019-09-19 | Arcelormittal | Procédé de revêtement par immersion d'une bande métallique |
WO2019224584A1 (fr) | 2018-05-25 | 2019-11-28 | Arcelormittal | Procédé de revêtement par immersion d'une bande métallique |
CN108624832A (zh) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | 热镀锌炉鼻子内抑制和清除锌灰装置 |
DE102019206609A1 (de) | 2019-05-08 | 2020-11-12 | Severstal | Verfahren und Vorrichtung zum Spülen einer Überlaufkammer an dem badseitigen Ende eines Rüssels einer Vorrichtung zum Schmelztauchbeschichten |
WO2021048593A1 (fr) | 2019-09-10 | 2021-03-18 | Arcelormittal | Trop-plein mobile pour équipements de revêtement par immersion à chaud en continu |
CN111705282B (zh) * | 2020-06-24 | 2022-04-08 | 浙江东南新材科技有限公司 | 一种高强度镀锌钢卷的生产工艺 |
EP4215637A1 (fr) | 2022-01-25 | 2023-07-26 | John Cockerill S.A. | Dispositif de nettoyage d'un museau dans une installation de galvanisation par immersion à chaud |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4759807A (en) * | 1986-12-29 | 1988-07-26 | Rasmet Ky | Method for producing non-aging hot-dip galvanized steel strip |
JPH0211742A (ja) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | 連続溶融金属めっき用スナウト内部のドロス除去装置 |
JPH02305948A (ja) * | 1989-05-19 | 1990-12-19 | Kawasaki Steel Corp | 連続溶融金属めっき用スナウト内部のドロス除去装置 |
JPH03150338A (ja) * | 1989-11-07 | 1991-06-26 | Nippon Steel Corp | 連続溶融合金化亜鉛メツキ鋼板の製造方法 |
JPH04120258A (ja) * | 1990-09-12 | 1992-04-21 | Kawasaki Steel Corp | 連続溶融亜鉛めっき方法および装置 |
JPH05279827A (ja) * | 1992-03-31 | 1993-10-26 | Kawasaki Steel Corp | 溶融金属めっきにおけるスナウト内ドロス除去装置 |
JPH11199997A (ja) * | 1998-01-14 | 1999-07-27 | Nisshin Steel Co Ltd | 連続溶融めっき装置のスナウト |
JP2001335906A (ja) * | 2000-05-26 | 2001-12-07 | Nippon Steel Hardfacing Co Ltd | スナウト内異物除去装置 |
-
2000
- 2000-11-07 RS YUP-405/03A patent/RS50049B/sr unknown
- 2000-11-10 FR FR0014480A patent/FR2816639B1/fr not_active Expired - Fee Related
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2001
- 2001-01-03 BR BRPI0100006-3A patent/BR0100006B1/pt not_active IP Right Cessation
- 2001-07-11 UA UA2003065327A patent/UA73220C2/uk unknown
- 2001-11-07 MX MXPA03004133A patent/MXPA03004133A/es active IP Right Grant
- 2001-11-07 CN CNB018203302A patent/CN1271234C/zh not_active Expired - Fee Related
- 2001-11-07 JP JP2002541136A patent/JP3747199B2/ja not_active Expired - Fee Related
- 2001-11-07 CZ CZ20031294A patent/CZ298795B6/cs not_active IP Right Cessation
- 2001-11-07 PL PL362615A patent/PL201517B1/pl unknown
- 2001-11-07 DE DE60103925T patent/DE60103925T2/de not_active Expired - Lifetime
- 2001-11-07 RS YUP-367/03A patent/RS50096B/sr unknown
- 2001-11-07 EA EA200300553A patent/EA004448B1/ru not_active IP Right Cessation
- 2001-11-07 EE EEP200300209A patent/EE04644B1/xx unknown
- 2001-11-07 ME MEP-2009-153A patent/ME00792B/fr unknown
- 2001-11-07 AU AU2002223777A patent/AU2002223777B2/en not_active Ceased
- 2001-11-07 HU HU0302618A patent/HU226624B1/hu not_active IP Right Cessation
- 2001-11-07 AT AT01993715T patent/ATE269427T1/de active
- 2001-11-07 SK SK538-2003A patent/SK286793B6/sk not_active IP Right Cessation
- 2001-11-07 DK DK01993715T patent/DK1334217T3/da active
- 2001-11-07 WO PCT/FR2001/003455 patent/WO2002038824A1/fr active IP Right Grant
- 2001-11-07 ES ES01993715T patent/ES2223956T3/es not_active Expired - Lifetime
- 2001-11-07 CA CA002428487A patent/CA2428487C/fr not_active Expired - Lifetime
- 2001-11-07 US US10/416,192 patent/US6936307B2/en not_active Expired - Lifetime
- 2001-11-07 EP EP01993715A patent/EP1334217B1/fr not_active Expired - Lifetime
- 2001-11-07 PT PT01993715T patent/PT1334217E/pt unknown
- 2001-11-07 TR TR2004/01449T patent/TR200401449T4/xx unknown
- 2001-11-07 AU AU2377702A patent/AU2377702A/xx active Pending
- 2001-11-07 KR KR1020037006351A patent/KR100725557B1/ko active IP Right Grant
- 2001-11-09 AR ARP010105243A patent/AR034274A1/es active IP Right Grant
- 2001-11-09 TW TW090127933A patent/TW554073B/zh not_active IP Right Cessation
-
2003
- 2003-05-07 ZA ZA200303500A patent/ZA200303500B/en unknown
- 2003-05-07 MA MA27146A patent/MA25923A1/fr unknown
- 2003-05-07 BG BG107779A patent/BG64800B1/bg unknown
- 2003-05-08 EC EC2003004594A patent/ECSP034594A/es unknown
- 2003-05-09 NO NO20032089A patent/NO20032089L/no not_active Application Discontinuation
- 2003-05-09 HR HR20030370A patent/HRP20030370B1/xx not_active IP Right Cessation
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