EP0477710A1 - Installation de passage pour déposer un métal liquide - Google Patents

Installation de passage pour déposer un métal liquide Download PDF

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Publication number
EP0477710A1
EP0477710A1 EP91115664A EP91115664A EP0477710A1 EP 0477710 A1 EP0477710 A1 EP 0477710A1 EP 91115664 A EP91115664 A EP 91115664A EP 91115664 A EP91115664 A EP 91115664A EP 0477710 A1 EP0477710 A1 EP 0477710A1
Authority
EP
European Patent Office
Prior art keywords
channel
coating
liquid metal
continuous
chamber
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
Application number
EP91115664A
Other languages
German (de)
English (en)
Other versions
EP0477710B1 (fr
Inventor
Joachim Barzantny
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0477710A1 publication Critical patent/EP0477710A1/fr
Application granted granted Critical
Publication of EP0477710B1 publication Critical patent/EP0477710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C23C2/34—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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields

Definitions

  • the present invention relates to a liquid metal continuous coating system with an approximately horizontal coating channel for coating long profile pieces, in particular for galvanizing steel profile pieces.
  • Electromagnetic pumps require a magnetic yoke, which can be formed by a continuous reinforcing steel in a pump with a circular channel cross section.
  • a magnetic yoke which can be formed by a continuous reinforcing steel in a pump with a circular channel cross section.
  • DE-B 1 120 079 describes a device for regulating the falling speed of a stream of molten metal, in which a comb-like slotted magnetic core, which is aligned parallel to the direction of flow, is attached to a vertical flow channel of rectangular cross section on both broad sides, each having 19 to the channel directed teeth and 18 interconnected induction coils.
  • the channel is made up of numerous rings that are connected to each other by fire-resistant cement, which can be joined together and are preferably made of corundum.
  • the rings are coated with a refractory mass that has a heat-insulating effect and consists, for example, of an aluminum oxide powder contained in a casing.
  • the invention has for its object to provide a liquid metal continuous coating system for long profile body of almost any cross-section, which prevents the liquid metal intended for coating from running out in the coating channel.
  • a liquid metal continuous coating system for long profile bodies with a heatable coating channel of approximately horizontal longitudinal axis and of horizontally flat cross section, with a pair of electromagnets on the broad sides at both ends above and below the coating channel and with a supply channel for liquid Metal.
  • the electromagnets which normally consist of induction coils wound on iron cores, are subjected to a multi-phase alternating current, a force is generated in the liquid metal, which is directed into the coating chamber, between two opposing electromagnets. In this way, the liquid metal in the coating chamber is prevented from escaping against its gravity.
  • a very thin layer of liquid metal adheres to the continuous profile piece or profile body, the layer thickness of which depends on the temperature in the coating chamber and on the dwell time of the profile piece in the liquid metal.
  • the temperature in the coating channel can be measured and controlled in a known manner. Then the layer thickness is only dependent on the throughput speed and the horizontal length of the liquid metal bath. This length can be adjusted by shifting the pairs of electromagnets against each other from outside the coating channel. The liquid metal continued with the continuous profile pieces is replaced via the feed channel. The force applied in the liquid metal is approximately proportional to the current applied in the electromagnet.
  • the system should preferably have a liquid metal furnace which keeps the fill level constant in the coating chamber and which is suitable for quick emptying of the system for inspection and maintenance.
  • the feed channel for liquid metal to the coating channel can be connected to a chamber of a heatable two-chamber furnace, the two chambers of which have a dividing wall with an overflow above the coating channel and which - preferably below the dividing wall - are connected to an electromagnetic pump.
  • this pump maintains a level that keeps the coating channel filled without special regulation.
  • Coating metal in solid or liquid form can be refilled at intervals in the other chamber without affecting the filling level in the coating channel.
  • the electromagnetic pump below the partition can be switched off, so that the coating channel empties into the two-chamber furnace.
  • the supply of an inert gas in the upper region of the coating channel is expedient so that cold outside air does not penetrate into the coating channel and oxidize or solidify hot liquid metal there.
  • a further embodiment of the invention is characterized in that the coating channel has interchangeable screens at the inlet and / or outlet, which are adapted to the continuous profile pieces at a short distance. On the one hand, this reduces the force required to hold the liquid metal in the coating channel and, on the other hand, the supply of cold outside air is reduced.
  • induction coils are arranged on comb-shaped coil cores with teeth directed towards the coating channel as electromagnets on the broad sides of the coating channel. With a constant tooth cross-section, these induction coils can be mounted on their comb-shaped coil core in a fully wound form. The necessary magnetic yoke is produced in each case via the back of the two comb-shaped coil cores opposite one another above and below the coating channel.
  • Figure 1 shows a perspective view with a vertical partial longitudinal section through a liquid metal continuous coating system without a liquid metal furnace.
  • FIG. 2 shows a vertical cross section through FIG. 1 in the area of the feed for the liquid metal and a section through a connected two-chamber furnace.
  • a rectangular profile piece 1 runs through an inlet panel 2 into a horizontal coating channel 3 with a horizontally flat cross section. In operation, this channel 3 is filled with a liquid metal.
  • the profile piece 1 exits through an outlet panel 4.
  • the panels 2, 4 are interchangeable. They are adapted to the continuous profile pieces 1 with a small distance.
  • a pair of electromagnets is arranged above and below the coating channel 3 both after the inlet orifice 2 and in front of the outlet orifice 4.
  • Their induction coils 5 are arranged on comb-shaped coil cores 6, each with six teeth directed towards the coating channel 3. Coils 5 lying one above the other are wound in the same sense.
  • the rectangular profile 1 passes through an electrically heated coating channel 3, which is filled with liquid metal during operation.
  • This channel 3 is connected to a likewise electrically heatable two-chamber furnace 8 via a lateral horizontal feed channel 7 for liquid metal.
  • the two-chamber furnace 8 has a likewise electrically heatable ceiling 9 with an insulated filler cap 10.
  • In the interior of the furnace 8 there is a vertical partition wall 11 which has an overflow edge 12 somewhat above the highest point of the coating channel 3.
  • An electromagnetic pump 13 below the two-chamber furnace 8 connects the two chambers 14 and 15 to one another via openings on the bottom. During operation in the chamber 15, it keeps the level of the liquid metal constant by means of the overflow 12.
  • the coating channel 3 is constantly filled with constant pressure; if necessary, it can be emptied very quickly by switching off the electromagnetic pump 13.
  • the chamber 14 can be charged with solid or liquid metal, without this filling process being able to affect the fill level in the coating channel 3. Any deposits of oxides or impurities floating on top of the liquid metal are flushed into the chamber 14 via the overflow 12; therefore they cannot penetrate into the coating channel 3.
  • the winding direction of the induction coils 5 below and above the coating channel 3 is indicated by a wire winding 16.

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)
  • Application Of Or Painting With Fluid Materials (AREA)
EP91115664A 1990-09-28 1991-09-16 Installation de passage pour déposer un métal liquide Expired - Lifetime EP0477710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9013648U 1990-09-28
DE9013648U DE9013648U1 (de) 1990-09-28 1990-09-28 Flüssigmetall-Durchlaufbeschichtungsanlage

Publications (2)

Publication Number Publication Date
EP0477710A1 true EP0477710A1 (fr) 1992-04-01
EP0477710B1 EP0477710B1 (fr) 1995-06-21

Family

ID=6857935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115664A Expired - Lifetime EP0477710B1 (fr) 1990-09-28 1991-09-16 Installation de passage pour déposer un métal liquide

Country Status (3)

Country Link
EP (1) EP0477710B1 (fr)
AT (1) ATE124093T1 (fr)
DE (2) DE9013648U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105159A1 (de) * 1991-02-20 1992-08-27 K A Schwan Vorrichtung zum beschichten und rippen von betonstahl

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB777213A (en) * 1952-04-09 1957-06-19 Birlec Ltd A new or improved method of, and apparatus for, controlling or preventing the discharge of molten metal from containers
FR2229782A1 (en) * 1973-05-15 1974-12-13 Nippon Kokan Kk Continuous hot dip metal coating of strip or wire - by feeding metal bath and applying an electromagnetic force
FR2237975A1 (fr) * 1973-07-17 1975-02-14 Nippon Kokan Kk
FR2318239A1 (fr) * 1975-07-18 1977-02-11 Pechiney Ugine Kuhlmann Procede de revetement au trempe de fils ou bandes metalliques a grande vitesse
FR2386359A1 (fr) * 1977-04-07 1978-11-03 Labo Electronique Physique Procede de depot par immersion en continu, dispositif et produits obtenus
FR2539761A1 (fr) * 1983-01-26 1984-07-27 Sp P Konstruktor Installation pour deposer un revetement protecteur sur des profiles lamines par un procede chaud
EP0402270A1 (fr) * 1989-06-09 1990-12-12 Delot Process S.A. Enceinte et installation pour le revêtement continu/intermittent d'objets par passage desdits objets à travers un bain d'un produit métallique liquide de revêtement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54150446A (en) * 1978-05-19 1979-11-26 Koshuha Netsuren Kk Continuous coating layer formation of unbonded pc steel rod and apparatus therefor
US4242150A (en) * 1979-05-25 1980-12-30 Maxwell Herris M Method of producing reinforcing bars with corrosion resistant coating
EP0059070A1 (fr) * 1981-02-24 1982-09-01 Spencer Clark Metal Industries Limited Barres d'acier protégées contre la corrosion
DE3303468C2 (de) * 1983-02-02 1986-07-24 Konakovskij zavod stal'nych konstrukcij, Konakovo, Kalininskaja oblast' Anlage zum Metallisieren von Walzprofilen unter Schutzgas
DD277089B1 (de) * 1988-11-18 1993-02-11 Ammendorf Waggonbau Einrichtung zum oxidfreien beschichten von metalloberflaechen in schmelzfluessigen metallbaedern, insbesondere zum verzinnen der schutzrohrflansche von hochspannungsheizstaeben

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB777213A (en) * 1952-04-09 1957-06-19 Birlec Ltd A new or improved method of, and apparatus for, controlling or preventing the discharge of molten metal from containers
FR2229782A1 (en) * 1973-05-15 1974-12-13 Nippon Kokan Kk Continuous hot dip metal coating of strip or wire - by feeding metal bath and applying an electromagnetic force
FR2237975A1 (fr) * 1973-07-17 1975-02-14 Nippon Kokan Kk
FR2318239A1 (fr) * 1975-07-18 1977-02-11 Pechiney Ugine Kuhlmann Procede de revetement au trempe de fils ou bandes metalliques a grande vitesse
FR2386359A1 (fr) * 1977-04-07 1978-11-03 Labo Electronique Physique Procede de depot par immersion en continu, dispositif et produits obtenus
FR2539761A1 (fr) * 1983-01-26 1984-07-27 Sp P Konstruktor Installation pour deposer un revetement protecteur sur des profiles lamines par un procede chaud
EP0402270A1 (fr) * 1989-06-09 1990-12-12 Delot Process S.A. Enceinte et installation pour le revêtement continu/intermittent d'objets par passage desdits objets à travers un bain d'un produit métallique liquide de revêtement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105159A1 (de) * 1991-02-20 1992-08-27 K A Schwan Vorrichtung zum beschichten und rippen von betonstahl

Also Published As

Publication number Publication date
EP0477710B1 (fr) 1995-06-21
DE59105780D1 (de) 1995-07-27
DE9013648U1 (de) 1992-02-06
ATE124093T1 (de) 1995-07-15

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