EP3638821A1 - Rüssel für eine schmelztauchbeschichtungsanlage - Google Patents
Rüssel für eine schmelztauchbeschichtungsanlageInfo
- Publication number
- EP3638821A1 EP3638821A1 EP17732049.6A EP17732049A EP3638821A1 EP 3638821 A1 EP3638821 A1 EP 3638821A1 EP 17732049 A EP17732049 A EP 17732049A EP 3638821 A1 EP3638821 A1 EP 3638821A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- trunk
- support plate
- frame
- unit
- plate
- 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
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
- C23C2/34—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
-
- 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
Definitions
- the present application describes a so-called "snout" construction typically used as an essential piece of equipment for a hot dip or fire coater in industrial practice, which is previously heat-treated in a metallic manner
- Flat product such as steel, as a strip in a coating bath of molten metal (eg, Zn or Al-based alloys) passed over, so that contact between the heat-treated surface and the environmental atmosphere is avoided.
- molten metal eg, Zn or Al-based alloys
- a system for continuous fire-coating of steel strip consists inter alia of a continuous annealing furnace, a molten bath, a device for adjusting the coating thickness and a subsequent cooling device.
- the steel strip is continuously annealed, the continuous furnace being divided into several chambers where different treatments are performed. These treatments include, for example, the adjustment of the desired mechanical properties of the base material by recrystallization of the steel.
- iron oxides formed in a preheating zone are thereby reduced.
- the strip is cooled under inert gas (HNX) to a temperature close to the molten bath temperature.
- HNX inert gas
- the shielding gas is intended to prevent the annealed strip from oxidizing prior to fire coating, thereby reducing the adhesion of e.g. Zinc layer would be significantly deteriorated. Due to the different treatments, therefore, sometimes different gas atmospheres in the chambers are required.
- the protective gas-containing connector or lock between annealing furnace and molten bath is called proboscis.
- Coating faults whose causes can be found in the trunk represent a significant challenge for any operator of such a hot-dip coating system. It is known that metal evaporates from the molten pool of molten metal inside the trunk and can precipitate on the steel strip or the trunk inner wall, for example. This observation is reinforced when using measures to produce a directed flow in the melt in the trunk, for example by the use of zinc pumps. Both can cause qualitative failures of the flat steel product to be produced, eg also by falling of condensed and agglomerated metal dust from the trunk inner wall to the flat steel product. Simple and well-established countermeasures are, for example, the targeted sowing of the trunk atmosphere to reduce the evaporation rate or the heating of the trunk.
- the former has the negative side effect of increased slag formation on the surface of the molten bath or coating bath level, which also produces quality failures. Furthermore, a trunk heating does not in itself prevent the presence of the metal dust, so that it can continue to be harmful to the process.
- the invention is therefore based on the object to provide a device which allows easy and fast maintenance, such as cleaning and the like .
- Other objects of the invention are a favorable manufacturability, a small footprint and ease of assembly allow or suitable for retrofitting existing systems and can be realized with the least possible technical effort.
- a secondary task is to prevent influencing adjacent gas atmospheres, in particular to achieve a separation of proboscis and furnace atmosphere to avoid unnecessary protective gas consumption or contamination of the furnace.
- a trunk for a hot-dip coating installation for a flat product which extends from the exit of a continuous furnace into a melt below the coating bath level and isolates the flat product from the environment, wherein at least one suction unit and one blowing unit are provided, characterized in that Blowing unit and the suction unit are provided on a common support plate, that the support plate is connected along one edge via at least one hinge with the trunk, and that the support plate in a closed position, in which the support plate closes an opening on the trunk, and an open position is movable.
- the carrier plate with the injection and suction units can easily be moved to an open position for maintenance, whereby it is easily accessible.
- a defined positioning of the support plate and thus the injection and suction unit is maintained by the joints continue, so after the maintenance work quickly and easily changed back to the closed position and an operable trunk is reached.
- proboscis are characterized in that the opening in the trunk is formed by a frame, wherein the frame has a circumferential counter-plate which is in contact with the carrier plate in the closed position. Due to the frame, a trunk can be easily removed or retrofitted, as this causes a stiffening of the structure of the trunk and possibly provided for the injection and suction unit space required is provided. Next can be provided by the frame provided on the counter plate a corresponding counterpart for the support plate in order to achieve a good support and sealing.
- the frame at least in the longitudinal direction of the trunk has a greater length than the recess in the wall of the trunk, so that within the frame, a projection of the wall of the trunk is present. This embodiment facilitates connection of the frame to the trunk. Furthermore, this provides a limitation of the wall of the trunk in the frame, which can be used, for example, as a stop or positioning aid for further installations, such as sensors and the like.
- the trench sin are characterized in that the injection unit and suction unit are mounted on a cover plate which is connected to the carrier plate, and that the cover plate overlaps with the projection of the wall of the trunk within the frame at least partially.
- the projection of the wall of the trunk within the frame is at least partially used as a bearing surface a cover plate.
- the cover plate carries the parts of the injection and suction unit which lie in the closed position within the trunk. Through the cover plate a double-walled design is achieved, which improves the thermal insulation and in particular the sealing of the trunk to the environment. On the cover plate and / or the supernatant further sealing elements may be provided for this purpose.
- probes according to the invention are characterized in that an insulating material is arranged between the carrier plate and the cover plate.
- an insulating material is arranged between the carrier plate and the cover plate.
- trunk according to the invention are characterized in that closure means for releasable attachment to the trunk or the frame are provided at least along a further edge of the carrier plate.
- the edge opposite the joints lends itself to the attachment of the closure means, but the closure means can also be provided circumferentially over several edges of the support plate.
- the support plate is pressed onto the counter plate or the wall of the trunk to ensure a good seal and a fixed positioning of the injection and suction unit.
- Trunk according to further embodiments are characterized in that on the support plate, the trunk, the frame or the joint, a limiting means is provided, through which the open position is defined.
- the limiting means which are formed for example as a stop, on the one hand ensures that the open position is defined and the support plate and thus the injection and suction unit have a firm and secure position for maintenance. On the other hand, it is ensured by the limiting means that lines to and from the injection and suction unit are not affected or other inputs and attachments to the trunk are not damaged by the support plate or protruding from this support plate lines and the like.
- the support plate has a circumferential sealing region which overlaps in the closed position with the wall of the trunk or the counter-plate of the frame.
- a graphite copper gasket with circumferential annular groove may be used, wherein the annular groove is still preferably applied with inert gas, such as nitrogen (N 2 ).
- N 2 nitrogen
- Trunk further embodiments are characterized in that the injection unit and suction unit is connected to at least one centered across the width line for supply or discharge of gas, that the lines are guided through the support plate to the outside and firmly connected to the support plate, and that the lines are each provided with a flange.
- the lines By carrying out the lines through the support plate and the connection, in particular circumferential weld, which is secured to the support plate on the one hand, the sealing of the proboscis to the environment.
- a defined position of the lines is achieved by the fixed connection, whereby the connection to other aggregates, such as inert gas source, treatment plants and the like, facilitates.
- Preferred embodiments of a trunk according to the invention are characterized in that the lines have an arc on the outside and adjacent arcs are aligned in different directions.
- a connection of the, preferably flexible executed, protective gas and suction channels is simplified.
- the bows have the advantage of keeping the space required up to low or to allow the largest possible opening angle for the open position. Another advantage lies in the different orientation of the bows, which causes the different channels not interfere with space.
- the flanges are preferably aligned in a direction parallel to or pointing away from the edge of the carrier plate, which is connected to the trunk by means of at least one joint.
- the proboscis according to the invention are characterized in that the at least one injection unit and a suction unit extend on both sides of the flat product over the transverse extent of the trunk to opposite walls, that the injection units are provided directly opposite one another, that the injection units each comprise at least two rows a plurality of slot nozzles with intervening intersections, the slot nozzles of the rows being offset from one another, the interrupts being shorter than the slot nozzles of the adjacent row so as to overlap the slot nozzles of the rows in the material flow direction, and the slot nozzles of a blow unit being one Interruption of the opposite injection unit is opposite.
- the injection units are located on both sides of the flat product guided through the trunk, preferably a continuous material web, such as steel strip.
- a continuous material web such as steel strip.
- the arrangement in rows and the interruptions in the rows slot machines can be used optimally, since the occurring beam expansion of emerging from adjacent slot nozzles protective gas flows do not interfere with each other and forms a closed curtain of gas through the arrangement.
- the suction units have main openings provided over the transverse extent, wherein the main openings are aligned in the material flow direction in order to produce a circulating flow.
- the main openings are located on the side facing away from the injection unit, whereby a entrainment of the injected gas is favored in the material flow direction and a circulation of the gas atmosphere takes place.
- zinc dust in a trunk can be sucked off and then filtered to obtain a largely "clean" gas atmosphere.
- the injection units and suction units are each connected to at least one centered line for the supply and removal of gas. As a result, the flow conditions over the width of the injection and suction units can be kept largely the same.
- the main openings in the region of the centered line have a greater height.
- the suction units comprise additional openings which are aligned perpendicular to the material flow direction. These additional openings improve the pressure conditions in the trunk and reduce the flow velocities at the openings of the suction unit, which has advantages in terms of noise and wear.
- the slot nozzles are characterized in that the slot nozzles have a width b, that the distance a between the rows is in the range of b ⁇ a ⁇ 2 * b, and that the overlap u of the slot nozzles in the material flow direction in the range of b ⁇ u ⁇ 3 * b, where additionally a ⁇ u.
- the slot nozzles In order to achieve the best possible separation of the gas atmospheres, the slot nozzles must not be too far away from each other.
- a minimum distance between the rows of the same width achieves good results and, with a distance of more than twice the width, increases the risk of impaired separation.
- Preferred embodiments of the snout are characterized in that the slot nozzles have a length I in the transverse direction, wherein the length I is in the range of 20 * b ⁇ I ⁇ 50 * b, preferably in the range of 30 * b ⁇ I ⁇ 35 * b ,
- the blow-in units and / or suction units are divided transversely into several sections, each section comprising its own centered line for supplying or removing inert gas.
- the flow conditions over the width of the trunk are further improved and in addition the required power per line is reduced.
- Embodiments of the trunk are characterized in that the injection units and / or suction units have a semicircular cross-section. Rounded cross-sections have aerodynamically advantageous geometries.
- the cross-section of the snout to be sealed is reduced by a blowing or suction unit placed on the trunk wall.
- That the trunk is heated or at least insulated in order to minimize the metal dust deposit on the trunk inner wall, corresponds to the prior art and is taken for granted.
- FIG. 1 shows a side view of a trunk in a schematic, inventive embodiment
- Fig. 2 a schematic injection unit viewed perpendicular to the material flow direction and Fig. 3: an embodiment of a suction unit.
- Fig. 1 shows an embodiment according to the invention of a trunk (9) from the side. Shown is a lower portion of the trunk (9), wherein in the installed state, the material flow direction (M) runs from top to bottom.
- the trunk (9) is on both sides of the flat product, not shown, with over the width of the spout (9) extending injection units (1) and suction units (3), the left side in the closed position and the right side are shown in the open position.
- the injection units (1) and suction units (3) are each arranged on a carrier plate (8).
- the support plate (8) is movably attached to hinges (10) on the counterplate (12) connected to the frame (11). But the joint (10) can also on the frame (11), the To be connected trunk (9) or more of these parts.
- the joints (10), as shown, are preferably provided on the lower edge viewed in the material flow direction (M), whereby opening downwards and depositing on the limiting means (17) is possible.
- the joints (10) can also be provided at other edges of the support plate (8), as well as have other designs. For example, guide rails in which guided on the support plate (8) projections are guided, are used as a hinge (10).
- the limiting means (17) limits the possible range of movement of the support plate (8) and thus defines the open position.
- the limiting means (17) as on the trunk (9) fixed stop on which the support plate (8) is stored and limits the opening angle, may be formed.
- the limiting means (17) can of course also be provided on the carrier plate (8) or the frame (11).
- a movable traction means with a corresponding fixed length, such as articulated lever, chain or rope, which are connected to edges of the support plate (8) without hinge (10) and corresponding to the counter-plate (12), frame (11) or trunk (9) can be provided as limiting means (17).
- the limiting means (17) can also be provided in the joint (10), such as in a guide rail or the like.
- the limiting means (17) also damage the lines (6) of the injection unit (1) and suction unit (3) or adjacent attachments (20), such as a dew point unit (20) shown on the trunk (9). avoided.
- the support plate (8) and the counter-plate (12) contact and form a sealing region (18), with which the trunk atmosphere is separated from the environment.
- suitable sealing means are provided for this temperature range. To ensure a good seal of the sealing area (18) and to set the closed position locking means (16) are provided.
- the closure means (16) are provided at least on the edge opposite the joints (10), but may also be distributed over several edges.
- the closure means (16) preferably have a tensioning effect which presses the carrier plate (8) and the counterplate (12) together. In the example shown in FIG. 1, this is engaged by a plurality of eyebolts distributed over the width, which are pivotally mounted on the frame (11), in tension plates attached to the carrier plate (8) and clamped with nuts screwed on. Other clamping devices such as wedges, bevels or levers are also possible.
- the injection unit (1) arranged in the closed position within the spout (9) and the downstream suction unit (3) in the material flow direction (M) are mounted on a common cover plate (14).
- the cover plate (14) By this cover plate (14), the positioning of the injection unit (1) and suction unit (3) to each other is ensured. Furthermore, this results in the support plate with a double-walled construction in the frame (11), whereby the sealing and thermal insulation is improved.
- the wall of the spout (9) has a projection (13) which, in particular in the material flow direction (M), projects into the frame (11). In the closed position, the cover plate (14) comes into contact with the projection (13), which further improves positioning and sealing.
- the cover plate (14) and the support plate (8) can be made in one piece or directly connected to each other.
- the carrier plate (8) and the cover plate (14) are spaced apart by corresponding configuration and / or spacers, in particular between carrier plate (8) and cover plate (14), especially in the region of the injection unit (1) and suction unit ( 3) an insulating material (15) is provided.
- conduits (6) are provided which extend from the injection unit (1) and suction unit (3) or the cover plate (14) through the support plate (8) extend outwards.
- the lines (6) each have a flange (19) in order to simplify the connection to channels for classifiedlasenden or to be sucked gas quantities.
- the lines (6) After passing through the carrier plate (8), the lines (6) are provided with arches, whereby the flanges (19) of adjacent lines (6) can be spatially separated from each other.
- the sheets have an angle of 30 ° to 90 ° degrees.
- the sheets are further preferably aligned parallel to the edge with the hinges (10) or in a direction away from this edge direction and fixed to the support plate (8).
- the connection to the carrier plate (8) is gas-tight and rotationally carried out, for example via a weld.
- FIG. 2 shows a schematic representation of an injection unit (1) according to the invention perpendicular to the material flow direction M, more precisely perpendicular to the plane of the flat product conveyed through.
- Two rows of slot nozzles (2) are shown, each of which have refractions or spaces between the slot nozzles (2).
- the slot nozzles (2) each have a width b and a length l.
- the two rows of slot nozzles (2) are removed from each other with a distance a in the material flow direction M.
- the slot nozzles (2) of adjacent rows are offset from each other, so that an interruption of a row is associated with a slot nozzle (2) of the adjacent row.
- the slot nozzles (2) are formed longer than the intervening interruptions, so seen in the material flow direction M, an overlap u of the ends of the slot nozzles (2) is formed.
- the overlap u is formed uniformly along the injection unit (1).
- Fig. 3 a portion is shown, which shows the lower injection unit (1) and suction unit (3) and parts of the upper injection unit (1) and suction unit (3) in the trunk (9) of an embodiment.
- the two opposite injection units (1) on the upper and lower wall of the spout (9) are shown, as well as the suction units (3) located downstream of the material flow direction M, ie downstream.
- the slot nozzles (2) of the injection units (1) are arranged offset from each other.
- the offset of the slot nozzles (2) relative to the opposite injection unit (1) is shown.
- the outermost slot nozzle (2) seen in the width direction of the spout (9), lies in the front row, that is to say in the upstream row, and the rear row, that is to say in the downstream row, begins with an interruption in the lower injection unit (1).
- the outermost slot nozzle (1) is arranged in the rear row and the front row starts with an interruption.
- both the suction units (3) and the injection units (1) are divided into several areas by intermediate walls (7) viewed in the width direction.
- these each have lines (6), which are indicated in Fig. 3 respectively by round connection openings for the lines (6).
- the injection units (1) and the suction units (3) are each formed with a semicircular cross-section, which has flow-related advantages due to the avoidance of sharp edges.
- Fig. 3 shows a preferred embodiment of a suction unit (3).
- the main openings (4) are aligned in the material flow direction M to produce a circulating flow behind the injection unit (1).
- the main openings (4) in the region of the lines (6) are in this case formed with a greater height in order to achieve relatively homogeneous flow conditions over the width.
- the height of the main openings (4) may change continuously or, as in the example shown, can jump.
- additional openings (5) are preferably provided at the top of the suction units (3).
- the additional openings can be formed with a uniform height over the width of the suction unit, or also analogously to the main openings (4) with different heights.
- the blowing units (1) and suction units (3) may be formed with a radius of 40 mm, for example, and the height of the main openings (4) in the range of 10 to 15 mm and the height of the additional openings (5 ) are at about 8mm.
- the lines (6) can then be formed in this example with a diameter of about 60mm.
Landscapes
- 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)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2017/064296 WO2018228662A1 (de) | 2017-06-12 | 2017-06-12 | Rüssel für eine schmelztauchbeschichtungsanlage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3638821A1 true EP3638821A1 (de) | 2020-04-22 |
| EP3638821B1 EP3638821B1 (de) | 2021-01-13 |
Family
ID=59101447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17732049.6A Not-in-force EP3638821B1 (de) | 2017-06-12 | 2017-06-12 | Rüssel für eine schmelztauchbeschichtungsanlage |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3638821B1 (de) |
| CN (1) | CN110730828B (de) |
| WO (1) | WO2018228662A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018211182A1 (de) * | 2018-07-06 | 2020-01-09 | Thyssenkrupp Ag | Vorrichtung und Verfahren zum Schmelztauchbeschichten eines Metallbandes |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07316760A (ja) * | 1994-05-30 | 1995-12-05 | Nisshin Steel Co Ltd | 連続溶融めっきにおけるスナウト内ドロス発生防止装置 |
| US6093452A (en) * | 1997-02-25 | 2000-07-25 | Nkk Corporation | Continuous hot-dip coating method and apparatus therefor |
| JPH11302811A (ja) * | 1998-04-17 | 1999-11-02 | Nippon Steel Corp | 連続亜鉛メッキ設備の炉内雰囲気ガス制御装置 |
| DE10208963A1 (de) * | 2002-02-28 | 2003-09-11 | Sms Demag Ag | Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen |
| DE102012106106A1 (de) | 2012-07-06 | 2014-09-18 | Thyssenkrupp Steel Europe Ag | Verfahren und Vorrichtung zur Vermeidung von durch Zinkstaub verursachten Oberflächenfehlern in einer kontinuierlichen Bandverzinkung |
| US10446877B2 (en) * | 2013-08-19 | 2019-10-15 | Sasit Industrietechnik Gmbh | Installation for producing both AGM and wet-cell batteries for passenger-car and commercial-vehicle battery types |
| DE102015108334B3 (de) * | 2015-05-27 | 2016-11-24 | Thyssenkrupp Ag | Vorrichtung und Verfahren zur verbesserten Metalldampfabsaugung bei einem kontinuierlichen Schmelztauchverfahren |
-
2017
- 2017-06-12 EP EP17732049.6A patent/EP3638821B1/de not_active Not-in-force
- 2017-06-12 CN CN201780091956.9A patent/CN110730828B/zh active Active
- 2017-06-12 WO PCT/EP2017/064296 patent/WO2018228662A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN110730828A (zh) | 2020-01-24 |
| WO2018228662A1 (de) | 2018-12-20 |
| CN110730828B (zh) | 2021-05-25 |
| EP3638821B1 (de) | 2021-01-13 |
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