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WO2018228663A1 - Dispositif et procédé de séparation d'atmosphères de gaz - Google Patents

Dispositif et procédé de séparation d'atmosphères de gaz Download PDF

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Publication number
WO2018228663A1
WO2018228663A1 PCT/EP2017/064301 EP2017064301W WO2018228663A1 WO 2018228663 A1 WO2018228663 A1 WO 2018228663A1 EP 2017064301 W EP2017064301 W EP 2017064301W WO 2018228663 A1 WO2018228663 A1 WO 2018228663A1
Authority
WO
WIPO (PCT)
Prior art keywords
units
suction
gas
flow direction
slot nozzles
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.)
Ceased
Application number
PCT/EP2017/064301
Other languages
German (de)
English (en)
Inventor
Sridhar Palepu
Michael Peters
Andreas WESTERFELD
Dr. Joachim HÜLSTRUNG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Steel Europe AG, ThyssenKrupp AG filed Critical ThyssenKrupp Steel Europe AG
Priority to CN201780091944.6A priority Critical patent/CN110832104B/zh
Priority to EP17733381.2A priority patent/EP3638822B1/fr
Priority to PCT/EP2017/064301 priority patent/WO2018228663A1/fr
Publication of WO2018228663A1 publication Critical patent/WO2018228663A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C23C2/003—Apparatus
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D99/0075—Gas curtain seals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum

Definitions

  • a system for continuous hot-dip galvanizing of steel strip consists inter alia of a continuous annealing furnace, a zinc bath (molten bath), a device for adjusting the zinc 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. In addition, iron oxides formed in a preheating zone are thereby reduced.
  • the strip is cooled under protective gas (HNX) to a temperature close to the molten bath temperature.
  • HNX protective gas
  • the inert gas is intended to prevent the annealed strip from oxidizing prior to galvanizing, which would significantly degrade the adhesion of the zinc layer. Due to the different treatments, therefore, sometimes different gas atmospheres in the chambers are required.
  • the shielding gas containing connector or lock between annealing furnace and zinc bath is called proboscis.
  • the trunk is provided with injection openings (circulation openings) and suction openings arranged vertically underneath.
  • injection openings circulation openings
  • suction openings arranged vertically underneath.
  • a single injection opening is arranged in the trunk wall facing the upper side of the steel strip and a single suction opening is arranged vertically below it.
  • a single injection opening and vertically below a single suction opening are arranged in the underside of the steel strip facing trunk wall.
  • a single injection port is disposed in a side wall of the spout, while vertically thereunder are provided two exhaust ports formed as longitudinal slots in pipes penetrating the side wall of the spout and extending over the entire top and bottom of the steel belt Steel strip width extend.
  • a disadvantage of such designs is an insufficient sealing of the gas atmosphere with and without zinc dust.
  • the invention is thus based on the object to provide a device and method which can effectively prevent interference of adjacent gas atmospheres, in particular a return flow.
  • Other objects of the invention are a favorable manufacturability, to allow a small footprint and easy installation. This object is achieved by a device according to the features of claim 1, in particular when it is used by a method according to the features of claim 11.
  • a device for separating gas atmospheres in a lock which has at least one injection unit and a suction unit over the transverse extent of the lock on opposite walls, wherein the injection units are provided directly opposite each other and the suction units are arranged downstream in the material flow direction, characterized in that the blowing units each comprise at least two rows of a plurality of slit dies with intervening intersections, the slit dies of the rows being offset from one another and the breaks being shorter than the slit dies of the adjacent row to overlap the slit dies of the rows in the material flow direction, and the slot nozzles of one injection unit are each opposite to an interruption of the opposite injection unit.
  • the injection units are located on both sides of the material guided through the lock, preferably a continuous material web, such as steel strip, wherein the invention is also applicable to conveyed piece goods.
  • 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 gas streams 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 supplying or discharging 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.
  • suction units comprise additional openings which are aligned perpendicular to the material flow direction. These additional openings improve the pressure conditions in the lock and reduce the flow velocities at the openings of the suction unit, which has advantages in terms of noise development 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 equal width achieved good results and at a distance of more than twice the width, divides the gas flow and increases the risk of deterioration in separation.
  • Preferred embodiments of the device 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 ,
  • Devices according to the invention are characterized in further embodiments in that additional injection units are arranged upstream in the material flow direction. These additional injection units further improve the separation of the gas atmospheres and reliably prevent backflow of the following gas atmosphere.
  • the injection units and / or suction units are divided transversely into several sections, each section comprising its own centered line for the supply and removal of gas. By this division into preferably equal-width sections, the flow conditions over the width of the lock are further improved and in addition the required power per line is reduced.
  • Embodiments of the device are characterized in that the injection units and / or suction units have a semicircular cross-section. Rounded cross-sections have aerodynamically advantageous geometries. Furthermore, the cross-section of the lock to be sealed is reduced by a blowing or suction unit placed on the lock wall.
  • Devices according to the invention are preferably operated with a method for separating gas atmospheres in a lock, which is characterized in that a larger volume flow of gas is withdrawn through the suction units than the volume flow of gas introduced by the adjacent injection unit.
  • the withdrawn volume flow is in this case by 15% to 20% greater than the introduced by the adjacent injection unit volume flow.
  • Embodiments of the method according to the invention are characterized in that a further volume flow is introduced through additional blowing units arranged upstream in the material flow direction, wherein the total volume flow introduced corresponds to the extracted volume flow.
  • the additional volume flow of the additional injection unit improves the separation of the gas atmospheres, since a pressure equalization with respect to the adjacent sections or gas atmospheres is achieved by the further volume flow.
  • a removal of the upstream gas atmosphere in the material flow direction is largely prevented.
  • Preferred embodiments of the method are characterized in that opposite to the additional injection unit by the blowing unit adjacent to the suction unit one around the twice to four times, preferably three times, larger volume flow is introduced.
  • the separation of the gas atmospheres is achieved by the suction unit and the adjacent injection unit and by the additional injection unit is a substantial decoupling of the gas atmospheres.
  • the introduced volume flow is preheated, preferably to a temperature of 450 ° to 550 ° C.
  • the temperature is preferably in the range of 450 ° to 550 ° C.
  • a device according to the invention can take place, for example, in a continuous furnace for the separation of different gas atmospheres.
  • devices according to the invention can also be used in other areas in which gas atmospheres are separated from one another in a continuous process.
  • FIG. 1 a schematic injection unit viewed perpendicular to the material flow direction
  • Fig. 3 considered a lock according to the invention perpendicular to the material flow direction. Description of the Preferred Embodiments (Best Mode for Carrying Out the Invention)
  • Fig. 1 shows a schematic representation of an injection unit (1) according to the invention perpendicular to the material flow direction, more precisely perpendicular to the plane of the conveyed through material seen.
  • two rows of slot nozzles (2) are shown, each having interruptions 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.
  • the slot nozzles (2) of adjacent rows are offset relative to each other so that a break in one 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, an overlap u of the ends of the slot nozzles (2) is formed.
  • the overlap u is formed uniformly along the injection unit.
  • FIG. 2 a portion is shown, the lower injection unit (1) and suction unit (3) and parts of the upper injection unit (1) and suction unit (3) in the lock of an embodiment shows.
  • the two opposite blowing units (1) on the upper and lower wall of the lock are shown, as well as the suction units (3) located downstream of the material flow direction, ie downstream.
  • the slot nozzles (2) of the injection units (1) are arranged offset from each other.
  • FIG. 2 also shows the offset of the slot nozzles (2) relative to the opposite blow-in unit (1).
  • the outermost slot nozzle (2) seen in the width direction of the lock, is arranged in the front, ie upstream, row in the lower injection unit (1), and the rear, ie, downstream, row begins with an interruption. Accordingly, in the upper blowing 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 (8) as viewed in the width direction.
  • these each have lines (6), which are indicated in Fig. 2 in each case by round connection openings for the lines (6).
  • the blowing 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. 2 shows a preferred embodiment of a suction unit (3).
  • the main openings (4) are aligned in the material flow direction M in order to produce a circulating flow behind the device.
  • 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 may be formed with a uniform height across 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.
  • 3 shows a plan view of an embodiment of a lock according to the invention. Here, the injection unit (1) and the suction unit (3) located downstream in the material flow direction M are shown.
  • an additional injection unit (7) is shown, which is arranged at a distance from the injection unit (1).
  • the distance between the injection unit (1) and the additional injection unit (7) is preferably in the range from the width to the double width the lock.
  • the additional injection unit is thus preferably arranged at a distance of 2 m to 3 m from the injection unit (1).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Coating With Molten Metal (AREA)

Abstract

La présente invention concerne un dispositif pour la séparation d'atmosphères de gaz dans un sas, lequel comprend d'au moins une unité d'injection (1) et une unité d'aspiration (3) respectivement sur des parois opposées dans l'étendue longitudinale du sas, les unités d'injection (1) étant disposées dans des positions directement opposées et les unités d'aspiration (3) étant disposées en aval dans la direction du flux de matériaux (M), caractérisé en ce que les unités d'injection (1) comprennent chacune au moins deux rangées d'une pluralité de buses à fente (2) avec des interruptions entre elles, les buses à fente (2) de la rangée étant disposées décalées les unes par rapport aux autres, et les interruptions étant plus courtes que les buses à fente (2) de la rangée adjacente, pour que les buses à fente (2) des rangées dans la direction de flux de matériaux (M) se chevauchent et que les buses à fente (2) d'une unité d'injection (1) soient situées chacune à l'opposé d'une interruption de l'unité d'injection opposée (1).
PCT/EP2017/064301 2017-06-12 2017-06-12 Dispositif et procédé de séparation d'atmosphères de gaz Ceased WO2018228663A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780091944.6A CN110832104B (zh) 2017-06-12 2017-06-12 用于气体气氛分离的装置和方法
EP17733381.2A EP3638822B1 (fr) 2017-06-12 2017-06-12 Dispositif et procédé de séparation d'atmosphères de gaz
PCT/EP2017/064301 WO2018228663A1 (fr) 2017-06-12 2017-06-12 Dispositif et procédé de séparation d'atmosphères de gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/064301 WO2018228663A1 (fr) 2017-06-12 2017-06-12 Dispositif et procédé de séparation d'atmosphères de gaz

Publications (1)

Publication Number Publication Date
WO2018228663A1 true WO2018228663A1 (fr) 2018-12-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/064301 Ceased WO2018228663A1 (fr) 2017-06-12 2017-06-12 Dispositif et procédé de séparation d'atmosphères de gaz

Country Status (3)

Country Link
EP (1) EP3638822B1 (fr)
CN (1) CN110832104B (fr)
WO (1) WO2018228663A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3591088A1 (fr) * 2018-07-06 2020-01-08 ThyssenKrupp Steel Europe AG Dispositif et procédé de revêtement par immersion à chaud d'une bande métallique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222853C1 (en) * 1992-07-11 1993-07-29 Eko Stahl Ag, O-1220 Eisenhuettenstadt, De Equipment for maintaining clean molten-metal dipping baths - has gas nozzles for removal mechanical impurities from strip surface
JPH07157853A (ja) 1993-12-06 1995-06-20 Nippon Steel Corp 溶融金属めっきのスナウト内亜鉛ヒューム除去方法及び装置
WO2000022363A1 (fr) * 1998-10-12 2000-04-20 Otto Junker Gmbh Systeme d'etancheite aux gaz pour installations de traitement thermique en continu en atmosphere inerte
WO2014006183A1 (fr) * 2012-07-06 2014-01-09 Thyssenkrupp Steel Europe Ag Procédé et dispositif servant à éviter les défauts de surface dus à la poussière de zinc dans une installation de galvanisation de feuillards en continu
WO2016188922A1 (fr) * 2015-05-27 2016-12-01 Thyssenkrupp Steel Europe Ag Dispositif et procédé pour une aspiration améliorée de vapeurs métalliques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2841675Y (zh) * 2005-05-13 2006-11-29 台湾镀锌股份有限公司 热浸镀锌工件分离设备
CN201187950Y (zh) * 2008-02-25 2009-01-28 宝山钢铁股份有限公司 一种汽水分离装置
DE102013104267B3 (de) * 2013-04-26 2014-02-27 Thyssenkrupp Steel Europe Ag Vorrichtung zum kontinuierlichen Schmelztauchbeschichten von Metallband

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222853C1 (en) * 1992-07-11 1993-07-29 Eko Stahl Ag, O-1220 Eisenhuettenstadt, De Equipment for maintaining clean molten-metal dipping baths - has gas nozzles for removal mechanical impurities from strip surface
JPH07157853A (ja) 1993-12-06 1995-06-20 Nippon Steel Corp 溶融金属めっきのスナウト内亜鉛ヒューム除去方法及び装置
WO2000022363A1 (fr) * 1998-10-12 2000-04-20 Otto Junker Gmbh Systeme d'etancheite aux gaz pour installations de traitement thermique en continu en atmosphere inerte
WO2014006183A1 (fr) * 2012-07-06 2014-01-09 Thyssenkrupp Steel Europe Ag Procédé et dispositif servant à éviter les défauts de surface dus à la poussière de zinc dans une installation de galvanisation de feuillards en continu
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
WO2016188922A1 (fr) * 2015-05-27 2016-12-01 Thyssenkrupp Steel Europe Ag Dispositif et procédé pour une aspiration améliorée de vapeurs métalliques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3591088A1 (fr) * 2018-07-06 2020-01-08 ThyssenKrupp Steel Europe AG Dispositif et procédé de revêtement par immersion à chaud d'une bande métallique

Also Published As

Publication number Publication date
EP3638822B1 (fr) 2021-01-20
CN110832104A (zh) 2020-02-21
EP3638822A1 (fr) 2020-04-22
CN110832104B (zh) 2021-11-23

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