EP0066523A1 - Vorrichtung zur Oberflächenbehandlung galvanisierter Bleche in einer abgegrenzten Atmosphäre - Google Patents

Vorrichtung zur Oberflächenbehandlung galvanisierter Bleche in einer abgegrenzten Atmosphäre Download PDF

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Publication number
EP0066523A1
EP0066523A1 EP82401011A EP82401011A EP0066523A1 EP 0066523 A1 EP0066523 A1 EP 0066523A1 EP 82401011 A EP82401011 A EP 82401011A EP 82401011 A EP82401011 A EP 82401011A EP 0066523 A1 EP0066523 A1 EP 0066523A1
Authority
EP
European Patent Office
Prior art keywords
fan
sheet metal
strip
zinc
passage
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.)
Withdrawn
Application number
EP82401011A
Other languages
English (en)
French (fr)
Inventor
Robert Wang
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.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
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 Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0066523A1 publication Critical patent/EP0066523A1/de
Withdrawn legal-status Critical Current

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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
    • C23C2/26—After-treatment
    • C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
    • 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
    • C23C2/265—After-treatment by applying solid particles to the molten coating

Definitions

  • the present invention relates to a device intended for treating surfaces of galvanized sheets in a confined atmosphere. It is more particularly aimed at obtaining galvanized sheets having the configuration known as "with very small flowers", that is to say having dimensions of the order of a millimeter, which gives the sheet a semi-shiny appearance. .
  • this device comprises: a fan, the suction of which is connected to a powder distributor, preferably zinc, and the discharge of which leads to a projection nozzle disposed opposite the sheet metal strip in continuous movement in coming from the galvanizing bath and covered with zinc not yet crystallized, the air flow being such that it freezes the liquid zinc before the strip leaves the device, and a box consisting of two housings symmetrical with respect to the sheet metal strip and delimiting between them a substantially vertical passage in which the sheet metal strip circulates, each casing comprising a projection nozzle connected to the discharge of the fan, and return slots disposed respectively at the upper part and at the lower part of each casing, said return slots being connected to the suction of the fan.
  • the present invention proposes to apply the device defined above for obtaining galvanized sheets with very small flowers, under a controlled atmosphere (N, or N + H, for example).
  • this invention relates to a device as specified above, further characterized in that it comprises means ensuring sealing, with respect to the external atmosphere and with respect to the other internal parts of the installation, the passage between the two casings of the box, in which the sheet metal strip circulates.
  • the sealing means are produced in the form of aerodynamic seals or gas curtain seals, in which the gas jets can come from an independent source, from the fan or from the recirculation circuit, after passing through a filtration system.
  • the device is made watertight, with respect to the external atmosphere and with respect to the other internal parts of the installation, by having, at the upper and lower parts of the box, aerodynamic seals or seals by gas curtain , respectively 30-30 'and 32-32'.
  • Each of these joints is constituted by a tube, such as 34, provided with slots 36 for blowing the gas jets constituting the gas curtain.
  • the pipes, such as 38, providing the gas supply can be connected to a separate source, or to the discharge of the fan 20, or to the recirculation circuit, after cleaning in a filtration means.
  • the operation of the device thus described is identical to that of the device described in the American patent mentioned above.
  • the gas (air) loaded with zinc powder is blown on the strip 10 via the blowing slots 16-16 ′, supplied by the fan 20, the suction of which is connected to the source of zinc. After passing along the strip, the gas is taken up through the slots 18-18 '. Thanks to the presence of the aerodynamic joints 30-30 ′, 32-32 ′, recirculation is carried out in a confined atmosphere (this atmosphere can consist, for example, of nitrogen or of a mixture of nitrogen and hydrogen) .

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)
EP82401011A 1981-06-03 1982-06-03 Vorrichtung zur Oberflächenbehandlung galvanisierter Bleche in einer abgegrenzten Atmosphäre Withdrawn EP0066523A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111013A FR2507106B1 (fr) 1981-06-03 1981-06-03 Dispositif pour le traitement de surfaces de toles galvanisees en atmosphere confinee
FR8111013 1981-06-03

Publications (1)

Publication Number Publication Date
EP0066523A1 true EP0066523A1 (de) 1982-12-08

Family

ID=9259155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401011A Withdrawn EP0066523A1 (de) 1981-06-03 1982-06-03 Vorrichtung zur Oberflächenbehandlung galvanisierter Bleche in einer abgegrenzten Atmosphäre

Country Status (2)

Country Link
EP (1) EP0066523A1 (de)
FR (1) FR2507106B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117958A1 (de) * 1983-02-18 1984-09-12 Stein Heurtey Verfahren und Vorrichtung zur Herstellung von metallischen Verbundsüberzügen auf Metallbändern
FR2544337A1 (fr) * 1983-04-13 1984-10-19 Ziegler Sa Procede et installation pour le revetement en continu d'une bande a l'aide d'un revetement oxydable
FR2544336A1 (fr) * 1983-04-13 1984-10-19 Ziegler Sa Installation pour le revetement en continu de bande, notamment pour la galvanisation de tole d'acier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1419636A (fr) * 1964-06-15 1965-12-03 Stein & Roubaix Appareil de traitement thermique
US3941906A (en) * 1973-03-01 1976-03-02 Theodore Bostroem Hot dip metallizing process
FR2282472A1 (fr) * 1974-08-20 1976-03-19 Nippon Steel Corp Installation pour le traitement de recuit d'une bande d'acier dans une ligne de traitement continue
US4111154A (en) * 1977-04-11 1978-09-05 Heurtey Metallurgie Apparatus for the surface treatment of galvanized sheet-iron

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1419636A (fr) * 1964-06-15 1965-12-03 Stein & Roubaix Appareil de traitement thermique
US3941906A (en) * 1973-03-01 1976-03-02 Theodore Bostroem Hot dip metallizing process
FR2282472A1 (fr) * 1974-08-20 1976-03-19 Nippon Steel Corp Installation pour le traitement de recuit d'une bande d'acier dans une ligne de traitement continue
US4111154A (en) * 1977-04-11 1978-09-05 Heurtey Metallurgie Apparatus for the surface treatment of galvanized sheet-iron

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117958A1 (de) * 1983-02-18 1984-09-12 Stein Heurtey Verfahren und Vorrichtung zur Herstellung von metallischen Verbundsüberzügen auf Metallbändern
FR2544337A1 (fr) * 1983-04-13 1984-10-19 Ziegler Sa Procede et installation pour le revetement en continu d'une bande a l'aide d'un revetement oxydable
FR2544336A1 (fr) * 1983-04-13 1984-10-19 Ziegler Sa Installation pour le revetement en continu de bande, notamment pour la galvanisation de tole d'acier
EP0122856A1 (de) * 1983-04-13 1984-10-24 Galvanor Ziegler Verfahren und Vorrichtung zum kontinuierlichen Überziehen eines Bleches mit einem oxydierbaren Überzug
EP0124408A1 (de) * 1983-04-13 1984-11-07 Ziegler S.A. Vorrichtung zum kontinuierlichen Überziehen eines Bandes, insbesondere zum Feuerverzinken eines Stahlbleches
US4502408A (en) * 1983-04-13 1985-03-05 Ziegler S.A. Installation for the continuous coating of a strip, especially for the galvanizing of sheet steel
US4612215A (en) * 1983-04-13 1986-09-16 Ziegler S.A. Process and installation for the continuous application of an oxidizable coating to a strip

Also Published As

Publication number Publication date
FR2507106B1 (fr) 1986-07-11
FR2507106A1 (fr) 1982-12-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: WANG, ROBERT