EP1488014A2 - Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la face frontale d'une bande metallique enroulee en forme de serpentin - Google Patents

Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la face frontale d'une bande metallique enroulee en forme de serpentin

Info

Publication number
EP1488014A2
EP1488014A2 EP03717151A EP03717151A EP1488014A2 EP 1488014 A2 EP1488014 A2 EP 1488014A2 EP 03717151 A EP03717151 A EP 03717151A EP 03717151 A EP03717151 A EP 03717151A EP 1488014 A2 EP1488014 A2 EP 1488014A2
Authority
EP
European Patent Office
Prior art keywords
heat transfer
coil
transfer medium
nozzle
metal strip
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
EP03717151A
Other languages
German (de)
English (en)
Other versions
EP1488014B1 (fr
Inventor
Rolf-Josef Schwartz
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.)
SCHWARTZ, EVA
Original Assignee
Individual
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
Priority claimed from DE10227498A external-priority patent/DE10227498B4/de
Application filed by Individual filed Critical Individual
Publication of EP1488014A2 publication Critical patent/EP1488014A2/fr
Application granted granted Critical
Publication of EP1488014B1 publication Critical patent/EP1488014B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/663—Bell-type furnaces
    • C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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

Definitions

  • the invention relates to a method for convective heat transfer between a heat transfer medium and an end face of a wound metal strip in the form of a coil, in which the end face with the
  • Heat transfer medium is applied by means of at least one nozzle wall.
  • the invention further relates to a device for carrying out the method for convective heat transfer between a heat transfer means and an end face of a wound metal strip in the form of a coil.
  • heat transfer through forced convection plays a major role, since it can be used to transmit high power and achieve even temperature distributions.
  • this method of heat transfer from a flowing fluid or gas to a workpiece requires a particularly uniform application of the respective heat transfer medium to the workpiece, since a uniform heat transfer must be ensured here without differences in local heat transfer resulting in different heating of the Guide the workpiece.
  • the uniform loading is a major problem, for example, when heating metal strips which are wound into cylindrical coils.
  • the heating Coils of this type typically take place in chamber furnaces in which the highest possible heat transfer is aimed at in order to reduce the glow and dwell time of the workpieces.
  • nozzle walls are known through which a fluid or gas is blown onto the end face of a cylindrical coil.
  • the object of the invention is therefore to provide a method for convective heat transfer between one
  • Heat transfer means and an end face of a metal strip in the form of a wound cylindrical coil with which the highest possible heat transfer can be achieved for metal strips of different widths.
  • Another object of the invention is to provide a device for carrying out the method for convective heat transfer.
  • this object is achieved in that an end face of a metal strip in the form of a wound coil by means of at least one nozzle wall Heat transfer means is applied, wherein the distance between at least one nozzle wall and the end face of the metal strip is adjusted.
  • the object is further achieved in that in a generic device for convective heat transfer between a heat transfer medium and an end face of a metal strip in the form of a wound coil, means are provided for applying the heat transfer medium to the end faces of the coil by means of at least one nozzle wall, the distance between at least a nozzle wall and the end face of the metal strip is adjustable.
  • a gas is conveyed as a heat transfer medium via a pressure box in nozzle walls and flows through the nozzles onto the end faces of the coil to be heated or cooled.
  • the distance between the nozzle walls and the end faces of the coil can be set in such a way that the best possible flow through the heat transfer medium results for metal strips of different widths.
  • the nozzle walls are movable along an axis that corresponds to the main axis of the coils or runs essentially parallel to it.
  • the expression “essentially” includes angles of the order of 0 to 10 °.
  • the nozzle walls can be moved along this axis in the direction of the end faces of the coil.
  • the distance between the nozzle wall and the coil surface can be changed be set to an optimal distance, and an effective inflow is always achieved.
  • an additional retrofittable nozzle box can be provided, which divides the useful space of the furnace. Then two coils can be placed in the usable space and loaded on both sides.
  • the pictures show:
  • FIG. 1 shows a section through a particularly preferred exemplary embodiment of a device for convective heat transfer from a heat transfer means to wound metal strips;
  • Fig. 2 shows an embodiment of a chamber furnace with an integrated device according to the invention.
  • FIG. 1 is a section through a particularly preferred embodiment of a device for convective heat transfer between one
  • Heat transfer means and an end face of a wound metal strip in the form of a cylindrical coil In the form of a cylindrical coil.
  • a fluid or a gas can be used as the heat transfer medium.
  • a gas is used for heat transfer.
  • the device comprises a pressure box 20 into which the coil 30 to be heated or cooled is introduced.
  • a cylindrically wound metal band at the coil is a cylindrically wound metal band.
  • the metal strip shown is wound around an axis 70 which runs horizontally in the figure, so that flat surfaces result on the end faces 31 and 32 of the coil. Essentially parallel to these
  • the gas for heating or cooling the coils can be introduced into the pressure box 20, for example, by means of a fan (not shown).
  • the gas can be different types of gas that are suitable for the respective application.
  • N 2 , N 2 H 2 , air, water vapor, protective gas, hydrogen, exogas or endogas can be used.
  • the flow of the gas within the pressure box is marked with arrows. The gas flows through the nozzle walls 10 and
  • the nozzle walls have a plurality of openings, which can be shaped differently. For example, perforated,
  • At least one of the nozzle walls 10 and 11 is designed to be movable along an axis which corresponds to the main axis of the coil or runs essentially parallel to it.
  • This movable design allows the distance 60 between the nozzle walls and the end faces of the coil to be the optimum distance for one set effective inflow.
  • the drive 40 for this movement is not shown in detail in FIG. 1, but rather is identified by horizontal movement arrows.
  • two positions of the nozzle wall 11 are shown at two different distances 60 on the right side of the coil.
  • the position with the greater distance is shown by a dashed outline. It is sufficient if only one of the nozzle walls can be moved along the main axis of the coil, but both nozzle walls can also be designed to be movable. If only one nozzle wall is movable, the coil must be positioned in the middle between the nozzle walls. If, on the other hand, both nozzle walls are movable, the walls can be brought to the optimal distance from the end faces of the coil.
  • the distance 60 can be optimized to such an extent that a very good one can be achieved without loss of performance
  • Seal can be adapted to requirements in different ways.
  • the sealing gap can be small or the seal can be designed as a labyrinth or contact seal will .
  • FIG. 2 shows a particularly preferred exemplary embodiment of a chamber furnace with an integrated device for heat transfer according to the invention.
  • the pressure box 20 is located inside the furnace and a coil 30 to be heated or cooled is positioned between the two nozzle walls 10 and 11.
  • the furnace is loaded with a coil from below, which is illustrated by dashed lines below the chamber of the furnace.
  • the usable space of the furnace can be divided by means of at least one retrofittable nozzle box. In this way, two or more coils can be placed in the usable space and loaded on both sides.
  • Such an additional nozzle box is not shown in Figures 1 and 2.
  • the chamber furnace is preferably controlled via control means with a program which expediently controls and regulates at least the temperature and the speed of the heat transfer medium and the distance between the nozzle walls and the coil in such a way that the best possible heat transfer occurs.
  • the design according to the invention of a device with nozzle walls, whose distance from the end faces of the coil to be heated or cooled, has various advantages.
  • the device can be adjusted to the respective coil dimensions so that an effective inflow is always guaranteed. from that results in better heat transfer than in conventional systems, which can reduce the dwell time of the workpieces in the furnaces. This in turn enables energy savings and a reduction in throughput times.
  • the installation of a separating nozzle box additionally improves the degree of utilization of the system.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Replacement Of Web Rolls (AREA)
EP03717151A 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la face frontale d'une bande metallique enroulee en forme de serpentin Expired - Lifetime EP1488014B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10211749 2002-03-15
DE10211749 2002-03-15
DE10227498A DE10227498B4 (de) 2002-03-15 2002-06-19 Verfahren und Vorrichtung zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und der Stirnfläche eines gewickelten Metallbandes in Form eines Coils
DE10227498 2002-06-19
PCT/DE2003/000865 WO2003078666A2 (fr) 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la face frontale d'une bande metallique enroulee en forme de serpentin

Publications (2)

Publication Number Publication Date
EP1488014A2 true EP1488014A2 (fr) 2004-12-22
EP1488014B1 EP1488014B1 (fr) 2005-07-27

Family

ID=28042844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03717151A Expired - Lifetime EP1488014B1 (fr) 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la face frontale d'une bande metallique enroulee en forme de serpentin

Country Status (4)

Country Link
EP (1) EP1488014B1 (fr)
AT (1) ATE300621T1 (fr)
AU (1) AU2003221602A1 (fr)
WO (1) WO2003078666A2 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05177240A (ja) * 1992-01-07 1993-07-20 Nippon Steel Corp 熱延コイルの冷却方法
JP3370562B2 (ja) * 1997-03-31 2003-01-27 川崎製鉄株式会社 熱延コイルの冷却方法およびその装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03078666A3 *

Also Published As

Publication number Publication date
EP1488014B1 (fr) 2005-07-27
ATE300621T1 (de) 2005-08-15
WO2003078666A3 (fr) 2003-12-18
WO2003078666A2 (fr) 2003-09-25
AU2003221602A8 (en) 2003-09-29
AU2003221602A1 (en) 2003-09-29

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