EP2173918A1 - Installation de revetement d'une bande metallique - Google Patents
Installation de revetement d'une bande metalliqueInfo
- Publication number
- EP2173918A1 EP2173918A1 EP08830457A EP08830457A EP2173918A1 EP 2173918 A1 EP2173918 A1 EP 2173918A1 EP 08830457 A EP08830457 A EP 08830457A EP 08830457 A EP08830457 A EP 08830457A EP 2173918 A1 EP2173918 A1 EP 2173918A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bath
- roll
- strip
- installation
- cooling
- 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
Links
- 239000002184 metal Substances 0.000 title claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 55
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 title claims abstract description 42
- 230000001174 ascending effect Effects 0.000 claims abstract description 12
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 64
- 238000009434 installation Methods 0.000 claims description 46
- 238000005246 galvanizing Methods 0.000 claims description 29
- 238000000137 annealing Methods 0.000 claims description 19
- 238000011144 upstream manufacturing Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 230000006866 deterioration Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 238000010791 quenching Methods 0.000 abstract description 19
- 230000000171 quenching effect Effects 0.000 abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C23C2/0035—Means for continuously moving substrate through, into or out of the bath
-
- 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
-
- 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
-
- 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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- 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
Definitions
- the invention relates to an installation for coating a strip product, in particular, a metal strip, by galvanizing.
- FIG. 1 shows schematically the usual constitution of a continuous annealing and galvanizing line comprising successively, in the direction of travel of the strip, that is to say from left to right on the FIG: an inlet section 1 with one or two belt unrollers 10, 10 ', a shear 11, for example with a guillotine, a splicing welder 12 for connecting the tail of a first band from one of the unrollers 10 at the head of the next strip from the other unwinder 10 ', so as to ensure a continuous operation of the line, and a tape accumulator 13 which allows to reserve a certain length of tape so as to restore it at the line, when the flow is stopped upstream of the accumulator, to make the splice in the welder 12; a section 14 for degreasing the cold-rolled strips or acid pickling of the hot-rolled strips; - an annealing furnace 2 successively comprising a heating section 21, a retention section 22 at the annealing temperature, a rapid cooling section
- FIG. 2 shows schematically, on a larger scale, the constitution of such a galvanizing section comprising means for controlling the continuous movement of the band M between a liquid zinc bath 31 and a final cooling bath.
- "quench tank” along a path defined by a plurality of deflection rolls and generally having a first inlet portion T1 of the band M in the metal bath 31, in a downward direction, to a first deflector roll 41 immersed in the bath 31, a second bath outlet portion 31, 31, in an upward direction, to a pair of deflector rollers 42, 42 'placed at a higher level above the bath 31 and at least a third portion T3 extending between an upper baffle roll 42 'and a lower baffle roll 43 immersed in the final cooling bath 35 and along which cooling means are placed; identification by blowing a gaseous fluid, the band M then being evacuated, passing on a deflector roll 44, towards the rest of the installation, for example a skin-pass rolling mill. Leaving the bath 31, the strip is covered on both sides with
- French Patent No. 2,726,288 of the same company discloses such an air knife dewatering device.
- the installation may comprise, on the upstream part T2 of the path of the strip, at the outlet of the metal bath 31, a heating furnace 33 making it possible to perform a so-called alloy heat treatment which ensures the diffusion of iron from the band, to the zinc coating, to create a real iron / zinc alloy.
- a heating furnace 33 making it possible to perform a so-called alloy heat treatment which ensures the diffusion of iron from the band, to the zinc coating, to create a real iron / zinc alloy.
- the strip must, however, be cooled before being immersed in the quenching tank 35.
- the installation therefore comprises, above the alloying oven 33 and / or on the downward path T3 of the strip, a cooling device 34 comprising for example, variable speed motor-blowers blowing air on the belt and whose flow rate can be regulated by measuring the temperature.
- a cooling device 34 comprising for example, variable speed motor-blowers blowing air on the belt and whose flow rate can be regulated by measuring the temperature.
- the building in which is placed such a galvanizing plant thus has a significant footprint.
- the galvanizing installation is only part of the production line which usually includes other sections also very cumbersome, in particular, the accumulators upstream bands 13 and downstream 17, the annealing furnace 2 which comprises a plurality of sections making it possible, on the one hand, to anneal and, on the other hand, to bring the strip to the desired temperature for galvanizing, the skin-pass rolling mill 15, the degreasing section 14 and the passivation section 16, as well as unwinding 10 and winding devices 19.
- the whole of such a facility is therefore an extremely important set and it is difficult, after construction, to make some sections the necessary changes while keeping the neighboring sections. It is therefore advantageous to reduce as much as possible the size of the installation, while providing opportunities for its evolution, for example by having the possibility to add, if necessary, a furnace of alliation, and / or cooling means.
- the object of the invention is to solve such problems thanks to a new arrangement of the installation making it possible to reduce its footprint.
- the invention also makes it possible to delay the moment when one of the so-called "exposed face of the strip” comes into contact with a deflector roll, in order to ensure excellent quality of the coating on this exposed face. .
- the invention therefore applies, in a general manner, to a coating installation of a strip product by passing it into a bath of liquid metal, comprising at least three parts, respectively a first part of entering the metal bath, passing on a first deflector roll placed at a lower level, a second ascending bath outlet portion between said first lower roll and a second upper level deflector roll, above metal bath, at least a third cooling portion extending between said second upper roll and a final coolant bath, and a fourth output portion of said cooling bath.
- the final cooling liquid bath is placed at a level higher than that of the metal bath and is shifted with respect thereto towards the inlet side, so that the fourth bath outlet portion cooling passes over the metal bath, and that the footprint of the entire coating installation does not significantly exceed that of the metal bath.
- the strip is supported, by a first face, on the first baffle roll, coming from a first inlet side in the metal bath and is supported by the same first face on the second baffle roll placed at higher level, so that the third cooling part is placed towards the same first side of the metal bath with respect to the second outlet portion of the bath.
- the installation comprises a quality control station of the coating, placed on the second side of the metal bath opposite the first inlet side of the strip and in front of which passes, in the first ascending part of the metal bath outlet, the second side of the strip opposite the first bearing surface on the first and second deflection rolls, and the strip passing over a baffle roll immersed in the final cooling bath; bearing on said roll immersed by its second face, then back over the entire installation, in the fourth part of the cooling bath outlet, taking support by the same second face on two separated upper rollers and down by a last descending part of the exit of the installation by passing in front of the station of verification the same second face of the band, so that the State of the coating on this second face can be checked on the one hand to the output of the metal bath and, secondly, at the output of the installation, after final quenching.
- the installation comprises at least one cooling means, by gas blowing, on both sides of the strip, arranged along the path thereof, or upstream of the second baffle roll in the second outlet portion of the metal bath, or downstream of said second deflector roll, at the beginning of the third cooling part.
- the invention also makes it possible to place a means for heating the strip in the second outlet portion of the metal bath, immediately above it, in order to perform an alloying treatment.
- the third cooling portion of the web has a single strand descending from the second baffle roll to the coolant bath above the metal bath.
- the third cooling portion comprises, from the second baffle roll placed at a higher level, a first descending strand to a third baffle roll placed below the second roll and above the bath metallic, a second ascending strand between said third roll and a fourth baffle roll placed substantially at the second roll, and a third descending strand between said fourth roll and the coolant bath, cooling means being placed at least on the one of the two ascending and descending strands, upstream of the third deflector roll so as to allow a support of the band on said third deflector roll, by its second face opposite to the first bearing face on the first and the second deflection roll, without deterioration of the coating deposited on this second face.
- cooling means are arranged, respectively, on the upward path between the first and second baffle rolls and on the descending path between the second upper roll and the third lower roll, said cooling means being offset in height and arranged in a staggered arrangement.
- the invention is particularly applicable to a coating installation arranged downstream, in the direction of travel, of an annealing line placed inside a closed enclosure for maintaining a non-oxidizing atmosphere, with scrolling the strip between two sets of deflector rollers spaced apart in height, said enclosure being closed at an outlet end by a vertical wall having a height corresponding to the spacing between the deflection rollers and provided at its lower part with a closed chute outlet strip to the metal bath gulvanization.
- the entire coating installation can be arranged in a constricted space extending vertically along the vertical closing wall of the enclosure and horizontally over a distance corresponding to the footprint of the bath metal with the exit chute of the band.
- the invention can also be applied, advantageously, to a coating installation disposed downstream from an annealing line placed inside a closed enclosure extending horizontally between an inlet end and an end of outlet equipped with a connecting chute opening into the galvanizing metal bath.
- the final cooling bath can be placed above the annealing enclosure, some distance upstream of the outlet end, and the third part of the path of the strip, along which cooling means are placed horizontally above the annealing chamber and returning upstream to the final cooling bath from which the fourth bath outlet portion extends horizontally downstream. passing over said cooling means.
- FIG. 1 is a general diagram of the assembly of an annealing and galvanizing line of known type
- FIG. 2 shows schematically the conventional layout of a galvanizing plant
- FIG. 3 is a diagram of a galvanizing installation according to the invention.
- FIG. 4 shows a variant with staggered arrangement of the cooling means
- FIG. 3 schematically shows a preferred embodiment of a galvanization plant according to the invention as indicated above, the strip M to be treated was first brought to a temperature which is desirable for galvanizing, preferably in a annealing furnace ending in a holding section 24 at a controlled temperature and having, at its outlet, a deflector roll 40 which directs the strip towards the galvanizing metal bath 31 formed in a tank
- the strip M therefore follows a downward path T1 between the output roll 40 and the immersed roll 41 on which it bears by its upper face A.
- the strip M then leaves the bath 31 along an upward vertical path T2 to an upper roller 42 passing a wiper device 32 for controlling the thickness of the coating.
- an oven 33 is placed above the dewatering device 32 and is followed by cooling cells 6 which can be placed, not only on the upward path T2, upstream of the upper roller 42, but also on the downward path T3, above the lower roller 43. It is thus possible to achieve sufficient cooling of the strip before the contact of its side A 'with the lower roller 43. It follows from this arrangement of the path of the strip, that the tank 5 containing the quenching bath 35, in which the final cooling of the band M is achieved, is placed above the tank 30 containing the galvanizing metal bath 31 and offset by relative to it, to the inlet side of the galvanizing installation whose footprint is thus reduced compared to the conventional arrangement of Figure 2.
- the galvanizing installation 3 is preceded, usually, by an annealing line 2 terminating in a section 24 in which the strip is brought to the desired temperature for galvanizing.
- the assembly is placed under a protective atmosphere in a closed enclosure 8 extended at its outlet end of the band M, by a chute 81 immersed in the metal bath 31 to maintain the seal.
- the band passes on two series of deflector rollers spaced in height and the enclosure 8 is therefore closed, at its outlet end, by a vertical wall 80 of corresponding height.
- the quench tank 35 is placed above the metal bath 31 and the outlet trough 81 and the assembly of the coating installation can therefore be arranged in a constricted space extending vertically in height, along the closing wall 80 of the annealing enclosure 8 and horizontally over a distance not exceeding the footprint of the metal bath 31 with the connecting trough 81.
- the overall size, in length, of the treatment line can be decreased compared to the conventional arrangement of Figures 1 and 2.
- the upper roller 42 may be placed at a height sufficient to have the cooling means 6 extending over the length necessary to obtain sufficient cooling of the strip before the contact of its side A 'with the lower roller 43.
- this roll 43 can be immersed in the quench bath 35.
- the band M can go up an ascending path T31 until to a second upper roll 44, then descend, in a descending path T32, to a deflector roll 45 immersed in the final cooling bath 35.
- the band M follows a rising path T4 to a pair of upper deflector rollers 46, 46 'spaced apart from each other, so as to pass the band over of the whole of the galvanizing section, then down, by a downward path T5, up to a lower roll 47 to be directed towards the rest of the installation, for example a skin-pass 15 mill.
- a verification station 7 by example a control cabin for an operator.
- This station 7 can thus be placed between the first ascending section T2 of the outlet of the metal bath 31 and the last descending section T5 of the outlet of the installation, deflector rollers 48 allowing, possibly, to provide the necessary location for the station 7 .
- the operator sees successively before him twice the same face. Knowing the total length of the path and the running speed of the belt which can be measured at any moment, the operator can therefore locate on the exposed face A 'of the belt, immediately above the wiper device 32, a doubtful zone and, after having allowed the time necessary for scrolling, to identify the passage of the same zone on the descending path T5 in order to check the possible presence of a defect after the final cooling and hardening of the coating.
- the arrangement according to the invention thus makes it possible to guarantee the best possible integrity of the exposed face of the coated strip.
- cooling means 61, 62 are distributed not only along the upward path T2 but also along the downward path T3, so as to provide sufficient cooling from the coating to the passage of the exposed face A 'on the lower roller 43.
- cooling cells 61, 62 may advantageously be staggered on the ascending strand and descending strand. In this way, the two strands T2, T3 can be separated by a single upper roller 42, which further reduces the footprint of the assembly.
- the invention is not limited to the case where, to reduce the length of the annealing line, the strip follows a zig-zag path by passing over two sets of rollers spaced apart in height.
- the invention can also be applied to the case of a continuous annealing furnace in which the band scrolls horizontally over a large length.
- the quenching bath 35 which, according to the invention, is offset backward with respect to the galvanizing bath 31, can be placed above the outlet end of the enclosure annealing 8 'whose height is, then, relatively reduced.
- the third part T3 of the path of the strip then extends horizontally while returning towards the upstream to the quenching tank 35 which is shifted back a sufficient distance to dispose the necessary means of refrofd ordinance 6 along said strand T3 .
- the fourth portion T4 of quenching bath 35 then returns horizontally downstream passing above said cooling means 6.
- the footprint of the coating plant 3 does not substantially exceed that of the galvanizing bath 31.
- the invention has been described in the usual case of a coating by passing on a roll immersed in a bath of liquid metal but it could also be applied to other coating devices, for example of the type in which the metal bath of galvanization is maintained by magnetic levitation by means of induction coils arranged along the upward path of the strip after passing on the lower roller 41 which, in this case, is not immersed.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0757022A FR2919816B1 (fr) | 2007-08-10 | 2007-08-10 | Installation de revetement d'une bande metallique |
| PCT/FR2008/000970 WO2009034244A1 (fr) | 2007-08-10 | 2008-07-03 | Installation de revetement d'une bande metallique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2173918A1 true EP2173918A1 (fr) | 2010-04-14 |
| EP2173918B1 EP2173918B1 (fr) | 2010-12-01 |
Family
ID=39382077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08830457A Not-in-force EP2173918B1 (fr) | 2007-08-10 | 2008-07-03 | Installation de revetement d'une bande metallique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2173918B1 (fr) |
| AT (1) | ATE490351T1 (fr) |
| DE (1) | DE602008003833D1 (fr) |
| FR (1) | FR2919816B1 (fr) |
| WO (1) | WO2009034244A1 (fr) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817876B1 (fr) * | 2000-12-08 | 2003-03-28 | Vai Clecim | Installation de production d'une bande metallique avec revetement de protection |
-
2007
- 2007-08-10 FR FR0757022A patent/FR2919816B1/fr not_active Expired - Fee Related
-
2008
- 2008-07-03 EP EP08830457A patent/EP2173918B1/fr not_active Not-in-force
- 2008-07-03 AT AT08830457T patent/ATE490351T1/de active
- 2008-07-03 WO PCT/FR2008/000970 patent/WO2009034244A1/fr not_active Ceased
- 2008-07-03 DE DE602008003833T patent/DE602008003833D1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009034244A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2919816B1 (fr) | 2009-10-09 |
| FR2919816A1 (fr) | 2009-02-13 |
| EP2173918B1 (fr) | 2010-12-01 |
| DE602008003833D1 (de) | 2011-01-13 |
| ATE490351T1 (de) | 2010-12-15 |
| WO2009034244A1 (fr) | 2009-03-19 |
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