EP2791605A1 - Four à cloche comportant un appareil émetteur de chaleur positionné à l'intérieur d'une cloche de protection, en particulier alimenté par une source d'énergie externe au four, pour transférer de la chaleur au gaz de recuit - Google Patents

Four à cloche comportant un appareil émetteur de chaleur positionné à l'intérieur d'une cloche de protection, en particulier alimenté par une source d'énergie externe au four, pour transférer de la chaleur au gaz de recuit

Info

Publication number
EP2791605A1
EP2791605A1 EP12801549.2A EP12801549A EP2791605A1 EP 2791605 A1 EP2791605 A1 EP 2791605A1 EP 12801549 A EP12801549 A EP 12801549A EP 2791605 A1 EP2791605 A1 EP 2791605A1
Authority
EP
European Patent Office
Prior art keywords
furnace
heat
transport fluid
gas
annealing gas
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Withdrawn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
EP12801549.2A
Other languages
German (de)
English (en)
Inventor
Robert Ebner
Heribert Lochner
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.)
Ebner Industrieofenbau GmbH
Original Assignee
Ebner Industrieofenbau GmbH
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 Ebner Industrieofenbau GmbH filed Critical Ebner Industrieofenbau GmbH
Publication of EP2791605A1 publication Critical patent/EP2791605A1/fr
Withdrawn legal-status Critical Current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
    • C21D9/0006—Details, accessories not peculiar to any of the following 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
    • 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
    • C21D9/677—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B11/00—Bell-type furnaces
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers

Definitions

  • Hood furnace with positioned within a protective hood heat dissipation device, in particular fed by an oven-external energy source, for releasing heat
  • the invention relates to a furnace for heat treating
  • Annealing material and a method for heat treating annealed material in a furnace are described.
  • AT 508776 discloses a method for preheating Glühgut in a Bebelglühstrom with the annealed under a protective hood in a transport fluid atmosphere receiving Glühsockeln.
  • the annealing material to be subjected to a heat treatment in a protective cover is preheated with the aid of a gaseous heat carrier, which circulates the protective hoods from the outside in a cycle and absorbs heat from a heat-treated annealed material in a protective hood and delivers it to a pre-heated annealing material in another protective hood.
  • a gaseous heat carrier which circulates the protective hoods from the outside in a cycle and absorbs heat from a heat-treated annealed material in a protective hood and delivers it to a pre-heated annealing material in another protective hood.
  • at least one additional incandescent base is used with a protective hood which can be heated from outside via burners. The hot exhaust gases from the heater
  • AT 507423 discloses a method for preheating Glühgut in a Bebelglühstrom with two the Glühgut under a protective hood receiving glow sockets. That in a protective hood of a
  • Heat treatment to be subjected to annealing is preheated by means of a gaseous heat carrier, between the two
  • Protective hoods is circulated and receives heat from a heat-treated in a protective annealing and to the
  • AT 411904 discloses a bell annealing furnace, in particular for steel strip or wire coils, with an annealing base which accommodates the annealed material and with a protective hood attached in a gas-tight manner. Furthermore, a radial fan mounted in the glow base is provided, which comprises an impeller and a rotor surrounding the impeller for circulating a transport fluid in the protective hood. A heat exchanger for cooling the transport fluid is the input side via a
  • Flow channel connected to the pressure side of the radial fan and ends on the output side in an annular gap between the nozzle and the guard.
  • An axially displaceable in the pressure-side flow path of the radial fan deflector is used for optional connection of the heat exchanger (water-cooled annular tube bundle) leading flow channel to the radial fan.
  • the protective cover is gas-tightly mounted on an annular flange, namely pressed against the base flange.
  • the heat exchanger (radiator) is located below the annular flange.
  • the flow channel consists of a from the
  • the deflection device is designed as a ring surrounding the outside, annular deflecting slide.
  • a furnace for heat treating annealing stock.
  • the oven has a closable glow space, which is designed for receiving and heat treating annealing material by means of thermal interaction of the annealing with heatable annealing gas in the annealing space.
  • the oven also has a removable one
  • heat exchange device is designed to exchange heat with the annealing gas within the protective hood.
  • Heat exchange apparatus is arranged relative to a first Glühgasventilator for driving the annealing gas such that in each
  • the invention provides a method of heat treating annealed material in a furnace.
  • the annealing material is received in a closable annealing space.
  • the glow chamber is closed with a removable protective cover.
  • the annealing material is in the closed furnace chamber by means of thermal interaction of the
  • the annealing gas is heated by means of exchanging heat with a heat dissipation device located at least partially inside the furnace chamber closed by means of the first protective hood inside the protective hood.
  • the heat exchange device is arranged relative to a first annealing gas fan for driving the annealing gas such that in each
  • an oven may be provided, one with a protective hood has sealed combustion chamber, in the interior of which a heatable and coolable annealing gas is arranged.
  • the annealing gas can turn in the
  • Glsweepingaums Glühgut for example, ribbon or wire coils or the like (for example, steel, brass, copper or aluminum and their alloys), heat.
  • a single protective hood is now sufficient in the furnace, since a heat exchange device (in particular a heat dissipation device, that is a technical device for discharging all heat for heating the annealing gas, or alternatively a heat receiving device, that is a technical device for receiving Heat of the annealing gas for cooling purposes), is positioned inside the protective hood.
  • a heat exchange device in particular a heat dissipation device, that is a technical device for discharging all heat for heating the annealing gas, or alternatively a heat receiving device, that is a technical device for receiving Heat of the annealing gas for cooling purposes.
  • Heat exchange device (in particular a heat exchanger, in particular a tube bundle heat exchanger) to the annealing gas or of the annealing gas to the heat exchange device allows without an indirect heat input from an exterior of the protective cover would be required by the protective hood.
  • Heat exchange device can thus heat dissipation or
  • the protective hood which can even be formed at least partially thermally insulating to
  • a significant advantage of embodiments of the invention is that in any operating condition (in particular for heating by means of a heater, for cooling by means of a cooling device and for heat exchange between annealing gas and
  • the annealing gas conveyed by the fan is directed directly to the heat dissipation device.
  • Mixture gas can be carried out in particular in full flow, ie. completely along a circumference (for example, an imaginary circle) around the fan.
  • a very efficient heat coupling between annealing gas and heat exchange device can be achieved.
  • the heat exchange device can in particular be mounted stationary or
  • the annealing gas driven by the first Glühgasventilator the annealing gas driven by the first Glühgasventilator
  • the heat exchange device should be stationary and immovable at a corresponding point of the furnace or permanently fixed there.
  • Heating unit Heating unit, a cooling mode for cooling by means of a
  • Cooling unit as well as a heat exchange operating state for
  • the protective hood-internal heat exchange device can be operated according to one embodiment selectively for supplying heat or cold and thus can also be operated as a cold discharge device (that is, for heat acceptance). Then it can also be designed as a heat and cold discharge device (or for heat dissipation and -äähme).
  • the protective hood may be the outermost, in particular the only, hood of the furnace chamber.
  • a single guard (with a plurality of coupled furnace chambers or sockets a single guard per furnace base) may be sufficient, resulting in a compact design.
  • the furnace may comprise a heating unit which is at least partially (preferably completely) arranged outside the furnace chamber and for supplying the
  • Heat exchange device is set up with heat.
  • the heating unit can thus be understood as the unit which actually generates the heat from another form of energy (electric current, gas, oil, pellets, etc.).
  • a protective hood external heat source can be provided, which supplies heat from outside the protective hood into the interior of the protective hood to the heat exchange device. This allows an easily controllable heating of the annealing gas. It may be an external of the oven space, i. outside the heated area,
  • heating unit the thermal energy over a
  • the heating unit may be, for example, an electric heating unit, a gas heating unit, an oil heating unit or a pelletizing unit.
  • the heating can be done, for example, with electrical energy. It is It is also possible to transfer electrical energy to hot-pressure gas via a chamber-external heat exchanger and to convey the thermal energy contained therein to the heat-exchange device. Alternatively or in addition to heating with electrical energy, heating with gas is possible. This can be over one
  • annealing chamber external heat exchanger for example using natural gas, take place, so that in turn hot gas to the
  • Heat exchange device can be transported. Such an oven is environmentally friendly operable, for example, because in an electric heating unit no carbon dioxide and no nitrogen oxides are generated. In a gas heating, a low methane consumption is possible, with small amounts of C0 2 and NO x may arise. An oil heating unit may burn oil to generate thermal energy.
  • Pelleticizing unit can burn wood pellets to generate thermal energy.
  • thermal energy there are other types of thermal
  • Energy generation units can be used according to the invention.
  • electrical heating energy can also be coupled via a transformer directly to the heat exchange device (for example, a tube bundle heat exchanger arranged inside the furnace).
  • a transformer directly to the heat exchange device (for example, a tube bundle heat exchanger arranged inside the furnace).
  • the stove can be an electric
  • Heat exchange device connects and thereby electrically coupled.
  • the coupling element is preferably through a furnace base (or a base foundation) of the furnace chamber into the furnace chamber
  • a coupling element for example, a low-resistance pipe wall of the transport fluid path can be used, to which the heat exchange device (in particular a tube bundle) connects.
  • this pipe wall is supplied with an electric current (preferably a high current at a low voltage) by an electric heating unit, this electric current becomes in Substantially loss-free or at least low-attenuation transferred to the high-resistance heat exchange device (in particular the tube walls of the tube bundle heat exchanger), so that on the
  • Heat exchange device ohmic losses occur with which the heat exchange device is heated in the furnace chamber. Passing through the coupling element through a bottom or a furnace base of the furnace chamber makes it possible to form the protective cover simply and without interruption, since passing through a supply line to the
  • Heat exchange device through the protective cover is dispensable.
  • the heat exchange device may (in particular completely) arranged in the furnace chamber
  • Heat exchanger which can be immovable (or immovable) and fixedly mounted at a predetermined location in the furnace chamber.
  • annealing gas can be removed from a central location in the
  • Furnace furnace arranged Glühgasventilator is circulated, for example, be directed by means of a nozzle directly to the fixed-mounted heat exchanger.
  • This heat exchanger can
  • Transport fluid to provide inside the protective hood and thereby to heat (or to cool) a thermally coupled with the heat exchanger annealing gas inside the hood. It can the
  • Heat exchanger to be configured to prevent direct contact between the annealing gas and the transport fluid, a thermal
  • transport fluid and annealing gas can be optimized separately for their respective function.
  • the heat exchanger for thermal energy exchange between the annealing gas and a
  • Transport fluid to be formed which transport fluid through the Heat exchanger can be conveyed through.
  • the transport fluid can be guided in a closed transport fluid path without contact with the annealing gas (ie without mixing of transport fluid and annealing gas, but with a thermal coupling between transport fluid and annealing gas).
  • the oven may further comprise
  • Heat exchange device may be designed for discharging or receiving heat to the further annealing gas within the further protective hood.
  • a possibly provided heating unit or cooling unit for supplying heat to the heat exchange device in the above-described first furnace chamber may be arranged, also for supplying the further heat exchange device with heat to them.
  • Heating unit or cooling unit can be used together for several furnace rooms or base of a hood furnace. In this way, the oven can be operated with several oven compartments or sockets.
  • the heating unit or cooling unit can be either for supplying one furnace space or for supplying the other furnace space or
  • Heat exchange device a further heat exchanger arranged in the further furnace chamber (in particular a shell-and-tube heat exchanger) be, which is designed for thermal exchange between the further annealing gas and the transport fluid.
  • the heat exchangers in the furnace chambers can also be thermally coupled together, for example by means of a transport fluid circulating between the heat exchangers.
  • the oven can be a closed
  • Heat exchange devices of the two furnace rooms communicate thermally with each other by means of the transport fluid.
  • the transport fluid path itself may be closed, i. E. allow only a thermal, not a direct fluid connection to the respective annealing gas in the respective furnace chamber. This way, in a multi-oven
  • Furnace spaces or sockets for example, thermal energy of a currently located in a cooling phase furnace chamber can be used to preheat another located just in a heating phase furnace chamber. This can be a separate and completed
  • Transport fluid to be provided with the arranged within the furnace chambers heat exchangers (thus each
  • heat exchanging partner base (for example, also 100%
  • transport fluid path is fluidically but not thermally decoupled from the annealing gas in the two furnace chambers, it is also possible to design the transport fluid used specifically to meet the requirements of efficient heat transfer, in particular a
  • Transport fluid to use a high thermal conductivity.
  • the transport fluid path as a
  • the heating unit for direct heating of the transport fluid or the first heat exchanger or the second heat exchanger can be configured such that the furnace chamber can be heated by means of thermal transfer of heating heat to the annealing gas or the further furnace chamber can be heated by thermal transfer of heating heat to the further annealing gas is.
  • the furnace chamber can be heated by means of thermal transfer of heating heat to the annealing gas or the further furnace chamber can be heated by thermal transfer of heating heat to the further annealing gas is.
  • the further furnace chamber can be closed with a removable further protective hood.
  • the two furnace chambers can structurally be configured in the same way.
  • the further protective hood may be the outermost, in particular the only, hood of the further furnace chamber.
  • a space-saving configuration can also be made possible on the side of the further furnace space in which thermal energy for heating the further furnace space can be supplied below the further protective hood.
  • the protective hood and / or the further protective hood can each have a heat-resistant
  • Inner housing in particular of a metal, and an insulating sheath of a heat-insulating material. Since the power supply according to this embodiment no longer takes place via the protective hood (for example, burner on the heating hood from the outside), which is
  • the guard can be designed significantly different than conventional guards with
  • the conventional protective hoods are to be formed of a higher heat-resistant material in order to achieve a thermal balance between the annealing gas under the respective protective hood and the flue gas between the heating hood and protective hood
  • the guard may be thermally insulated to suppress heat loss to the outside.
  • the / can
  • Tube bundle heat exchanger may be formed from bent into a bundle tubes, wherein the tube inner part of the transport fluid path and the transport fluid can be flowed through and the outer tube is brought directly into contact with the respective annealing gas.
  • a shell-and-tube heat exchanger can be formed from tubes arranged parallel to each other.
  • a shell-and-tube heat exchanger can be understood to mean a heat exchanger which is formed by a bundle of tubes which, for example, are wound in a circular manner.
  • the inside of the pipe can be part of the
  • the tube outer can be brought directly into contact with the respective annealing gas.
  • the pipe wall can be gas-tight and heat-resistant.
  • the arrangement may be configured such that the transport fluid is forced through the interior of the tubes and separated from the respective annealing gas through the tube wall.
  • a large effective thermal exchange surface can be provided so that the transport gas and the respective annealing gas can exchange a large amount of thermal energy.
  • embodiments of the invention can be used in a fully automatic mode.
  • a tube bundle can be used as a heat exchanger in the individual furnace chambers, which can be set in the full flow. This then serves to heat exchange between a cooling charge of Glühgut and an annealing batch of Glühgut. Furthermore, with the tube bundle heat exchangers on Annealing temperature to be further heated. Further cooling to a final temperature (for example, a discharge temperature of the Glühguts) can be carried out by means of the same shell and tube heat exchanger.
  • the furnace space can be a Glühgasventilator and / or the other furnace chamber another
  • the respective Glühgasventilator can be set, the respective annealing gas to the respective
  • a respective Glühgasventilator can be arranged in a lower region of the respective base or furnace space and can circulate the annealing gas to bring it into good thermal interaction with Glühgut in the respective furnace chamber.
  • the respective Glühgasventilator can steer for this purpose, the annealing gas by means of a nozzle in a particular direction.
  • the transport fluid may be a good heat-conductive transport gas, in particular hydrogen or helium.
  • the transport fluid may be a liquid or a gas.
  • hydrogen or helium use can be made of their good thermal conductivity.
  • these gases are well used even under high pressure.
  • the transport fluid in the transport fluid path may be under a pressure of about 2 bar to about 20 bar or higher, in particular under a pressure of about 5 bar to about 10 bar.
  • a significant overpressure of the transport fluid to atmospheric pressure can be generated, which can go beyond the only slight overpressure may be exposed to the annealing gas in the furnace.
  • the heat exchange can be made very efficient, without high pressure capability in the first and second
  • the transport fluid in the transport fluid path may be brought to a temperature in a range between about 400 ° C and about 1100 ° C, more preferably in a range between about 600 ° C and about 900 ° C.
  • the transport fluid in the transport fluid path may be brought to a temperature in a range between 700 ° C and 800 ° C.
  • Glühgut such as ribbons or wires or profiles of steel, aluminum, copper and / or their alloys.
  • the oven may be a
  • a control unit configured to control the transport fluid path such that by means of thermal exchange between the transport fluid and the annealing gas and the further annealing gas selectively one of the furnace space and the further furnace space in a preheat mode, a heating mode, a pre-cooling mode or a final cooling mode is operable.
  • a control unit may for example
  • Microprocessor which is the mode of operation of the different
  • control unit may, for example, control a heating unit, a cooling unit, fans or valves of the fluidic system in order to carry out an automated operation.
  • a preheat mode can be understood to mean an operating mode of a furnace space in which an annealing gas is increased to one
  • An annealing gas may be subjected to one or more consecutive preheating phases.
  • an oven-external heating unit gas, electric, etc.
  • a direct electrical heating of the heat exchange bundle can be switched on already in the above one or more stages preheated annealing gas to the annealing gas to a bring high final temperature.
  • an annealing gas may be subjected to precooling (quasi the inverse process to the above preheating) in which the annealing gas is brought to a lowered intermediate temperature by supplying the annealing gas with thermal energy to another annealing gas.
  • an oven-external cooling unit for example water cooling
  • the transport fluid path may include a transport fluid fan for conveying the transport fluid through the transport fluid path.
  • the transport fluid fan can thus promote the transport fluid along predetermined paths through
  • the transport fluid path may include a switchable radiator for cooling the transport fluid in the
  • Such a switchable cooler allows to apply cooling energy to the transport fluid, which can be coupled via the respective heat exchanger in the individual furnace chambers.
  • the transport fluid path may include a plurality of valves.
  • the valves may be, for example, pneumatic valves or solenoid valves, which can be switched by means of electrical signals.
  • the valves are suitably arranged in the fluidic path, different ones may be used
  • the valves may be switchable (for example, under control of a control unit) such that the furnace is selectively operable in one of the following modes of operation:
  • Transport fluid fan thermally coupled the transport fluid with the second annealing gas, so that the transport fluid to the second annealing gas Removes heat and supplies it to the first annealing gas to preheat the first furnace space and to pre-cool the second furnace space;
  • Transport fluid with the second annealing gas thermally coupled to further cool the second furnace chamber
  • Transport fluid with the first annealing gas thermally coupled to continue to cool the first furnace chamber.
  • the furnace may include means for pressure stabilizing the transport fluid path, in particular a
  • Transport fluid paths surrounds pressure-tight.
  • the entire transport fluid path which can be operated under high pressure of, for example, 10 bar, with pressure-resistant pipes, valves and
  • Transport fluid fans be executed or housed in a pressure vessel or other pressure protection device. But it is also possible, particularly pressure-loaded components, In particular, the transport fluid fan to coat with a pressure vessel.
  • FIG. 1 shows a hood furnace for heat treating annealing stock having a plurality of sockets according to an exemplary embodiment
  • Embodiment of the invention in which a hot gas can be heated or cooled by means of a heat exchanger.
  • the heating of the heat exchanger is initially by transport gas from another heat exchanger (a cooling base) and then with an electrical supply unit.
  • the cooling of the heat exchanger is initially by transport gas of another heat exchanger (a heating base) and then by a switchable
  • FIG. 2 to FIG. 5 are schematic representations of
  • FIG. 6 is a detail view of an inventive glow socket of the hood furnace according to FIG. 1.
  • FIG. 7 shows a hood furnace for heat treating annealing stock having a plurality of sockets according to another exemplary embodiment of the invention, in which a hot gas can be heated or cooled by means of a heat exchanger.
  • the heating of the heat exchanger is initially carried by transport gas from another heat exchanger (a cooling base) and then with an external gas heating unit.
  • the cooling of the heat exchanger is initially carried by transport gas of another heat exchanger (a Anterrorismenden base) and then by a switchable
  • FIG. 8 to FIG. 11 are schematic representations of
  • FIG. 12 shows temperature-time profiles of the embodiment shown in FIG. 1 or FIG. 7 hood furnace showing the respective temperature profiles of the individual sockets for the various operating conditions.
  • Fig. 13 shows temperature-time courses in a two-stage operation of a hood furnace according to the invention with two-stage
  • Preheating phase heating phase, two-stage pre-cooling phase and
  • FIG. 14 shows a schematic view of a multi-base furnace with two-stage heat exchange according to an exemplary
  • Fig. 15 shows a thermally insulated protective hood which can be used with a furnace according to an exemplary embodiment of the invention.
  • Fig. 16 shows a plan view of a hood furnace of the type shown in Fig. 6, in which a shell and tube heat exchanger
  • FIG. 1 a hood furnace 100 according to an exemplary embodiment of the invention will be described.
  • the hood furnace 100 is designed for heat treatment of annealing material 102.
  • This annealing material is arranged in part on a first base Sol of the hood furnace 100 and on another part on a second base So2 of the hood furnace 100.
  • annealing 102 which in Fig. 1 is merely schematically illustrated, may be, for example, steel strip or wire coils or the like (e.g., bulk on floors) to be heat treated.
  • the hood furnace 100 has a first closable furnace space 104 associated with the first base Sol.
  • the first furnace chamber 104 serves to receive and heat treat the Glühguts 102, which is supplied to the first base Sol set rate.
  • the first furnace chamber 104 is sealed gas-tight with a first protective hood 120.
  • the first protective hood 120 is bell-shaped and can be maneuvered by means of a crane (not shown).
  • the first annealing gas 112 for example hydrogen, can then be introduced as a protective gas into the first furnace chamber 104 hermetically sealed by the first protective hood 120 and heated, as will be described in more detail below.
  • a first annealing gas fan 130 (or
  • Base fan in the first furnace chamber 104 may be rotating
  • thermal active contact with the heat-treated annealing 102 are brought.
  • Tube bundle heat exchanger 108 arranged. This is formed from a plurality of windings of tubes, wherein transport gas 116 described in greater detail below is fed to a pipe inlet through which Pipe interior flows and is discharged through a pipe outlet. An outer surface of the tube bundle is in direct contact with the first annealing gas 112.
  • the first tube bundle heat exchanger 108 serves the thermal interaction between the first annealing gas 112 and the transport gas 116, which according to one embodiment, a highly thermally conductive gas such as hydrogen or helium under high pressure of for example 10 bar.
  • the first annealing gas 112 a highly thermally conductive gas such as hydrogen or helium under high pressure of for example 10 bar.
  • Tube bundle heat exchanger 108 can be clearly seen as a plurality of coiled tubes, wherein the transport gas can be passed through the interior of the tubes and over the thermally well-conductive, for example metallic, wall of the tubes in thermal
  • first annealing gas 112 Interaction with the circulating around the outer wall of the tubes first annealing gas 112 is brought.
  • first annealing gas 112 and the transport gas 116 are fluidically decoupled from each other or unmixable, but it can by means of the first shell and tube heat exchanger 108 in full flow, a thermal
  • the first shell and tube heat exchanger 108 is disposed relative to the first annealing gas fan 130 for driving the annealing gas such that in each operating state of the furnace 100, the annealing gas driven by the first annealing gas fan 130 becomes the first
  • Tube bundle heat exchanger 108 flows. The underlying
  • Transport gas paths 118 are provided in a small dimension, resulting in a compact design.
  • the pressure of the transport gas 116 may be substantially higher than the pressure of the annealing gas 112 and the
  • Annealing gas 114 can be selected in the respective furnace chamber 104, 106 (For example, a slight overpressure of between 20 mbar to 50 mbar above atmospheric pressure).
  • the second socket So2 has the same structure as the first socket Sol.
  • This contains a second Glühgasventilator 132 for circulating second annealing gas 114, for example, also hydrogen, in a second furnace chamber 106.
  • the second furnace chamber 106 is hermetically sealed by means of a second protective hood 122 from the environment.
  • a second shell-and-tube heat exchanger 110 permits a thermal, but not a contacting, interaction between the second annealing gas 114 and the transport gas 116.
  • two sockets Sol, So2 are shown, but in other embodiments, two or more sockets may be operatively coupled together.
  • the first furnace space 104 is bounded at the bottom by a first furnace base 170 (i.e., a heat-insulated pedestal base), whereas the second furnace space 106 is bounded at the bottom by a second furnace base 172.
  • a first furnace base 170 i.e., a heat-insulated pedestal base
  • a second furnace base 172 i.e., a heat-insulated pedestal base
  • Pipe interior of the first shell and tube heat exchanger 108 allows. Similarly, supply of the transport gas 116 through the second furnace base 172 to the interior of the pipe of the second
  • Shell and tube heat exchanger 110 allows. By doing that
  • Transport gas 116 is introduced through the respective furnace base 170, 172 through the bottom side into the respective furnace chamber 104, 106 or discharged therefrom, the energy is also supplied in the respective base
  • the transport gas 116 is closed by a
  • Transport gas path 118 which may also be referred to as a closed transport cycle, circulates. Closed means that the transport gas 116 is enclosed in a gastight manner in the heat-resistant and pressure-resistant transport gas path 118 and is protected from leakage from the system or from mixing with other gases and from pressure equalization with the environment. Therefore, the transport gas 116 circulates through the transport gas path 118 for many cycles before the transport gas 116 can be exchanged by, for example, pumping or the like.
  • the first shell-and-tube heat exchanger 108 functions functionally as a heat-dissipating device or heat-receiving device which, apart from inlet and outlet lines, is located completely inside the first furnace chamber 104 closed by the first protective hood 120.
  • the second tube bundle heat exchanger 110 also serves functionally as a heat dissipation device or heat receiving device, which - apart from supply and discharge lines - completely inside of the second
  • Protective hood 122 closed second furnace chamber 106 is located.
  • the heat output to the respective annealing gas 112, 114 by means disposed in the interior of the respective furnace chamber 104, 106 shell and tube heat exchangers 108, 110 (which are provided separately or independently of the protective hoods 120, 122 and covered by these) as a heat dissipation device or heat receiving device realized.
  • the provision of further hoods outside the protective hoods 120, 122 is dispensable according to the invention.
  • the closed transport gas path 118 with the first shell and tube heat exchanger 108 and the second shell and tube heat exchanger 110 is such
  • thermal energy between the first annealing gas 112 and the second annealing gas 114 is transferable. For example, if the first socket Sol in one
  • Cooling phase is located, can thermal energy of the still hot first annealing gas 112 by means of a heat exchange in the first
  • Tube bundle heat exchangers 108 are transferred to the transport gas 116.
  • the transport gas 116 heated thereby can be brought into thermal operative connection with the second annealing gas 114 via the second shell-and-tube heat exchanger 110 and thus serve for heating or preheating the second base So2.
  • thermal energy may alternatively be transferred from the second annealing gas 114 to the first annealing gas 112.
  • Transport gas 116 is strictly mechanically decoupled from the annealing gas 112 and the annealing gas 114, it is possible to keep the transport gas 116 in the transport gas path 118 under high pressure, for example, 10 bar. Due to this high pressure, a high heat energy between the first annealing gas 112 and the second annealing gas 114 can be exchanged very efficiently. Furthermore, it is possible, due to this decoupling of Glühgaspfad and Transportgaspfad the transport gas 116th
  • the electrical supply unit 124 includes a two-socket transformer 174 that is operatively coupled to an electrical supply unit 176 for providing a high voltage. Depending on the switching state of a switch 178 (secondary side), an electric current is transmitted via terminals 180 or 182 and via connection tubes 126 of the transport gas path 118 directly to the tube bundles 108 or 110. But it can also be provided per socket, a transformer to switch on the primary side at only about 1/10 of the current. The electrical supply unit 124 can also be completely deactivated. From the low impedance
  • Pipe wall 126 from the electric current is passed to the much higher-impedance shell and tube heat exchanger 108, where the
  • Tube bundle heat exchanger 110 transferred to the second annealing gas 114.
  • the supply unit 124 causes the tube bundle heat exchangers 108, 110 can be heated.
  • Isolation device 184 in the region of the first base Sol and a second electrical insulation device 186 in the region of the second base So2 provide for electrical decoupling of the pipe wall above or below these insulation elements 184, 186.
  • a transport gas fan 140 is provided, which is designed to convey the transport gas 116 through the transport gas path 118.
  • Transportgasventilator 140 can a
  • the transport gas path 118 further includes a connectable cooler 142 for cooling the
  • Transport gas 116 in the transport gas path 118 using a gas-water heat exchanger (alternatively, an electric cooling unit can be used at this point).
  • a gas-water heat exchanger (alternatively, an electric cooling unit can be used at this point).
  • one-way valves 144 Disposed at various locations of the transport gas path 118 are one-way valves 144, which can be electrically or pneumatically switched, for example, around one
  • multi-way valves 146 are mounted at other locations of the transport gas path 118, which are electrically or pneumatically switchable between a plurality of positions corresponding to a plurality of possible gas line paths.
  • the switching of the valves 144, 146 as well as the switching on or off of transport gas fan 140, supply unit 124 or cooler unit 142 can likewise be effected by means of electrical signals.
  • the system can either manually by an operator or by a
  • Control unit such as a microprocessor, which in Fig. 1 is not shown and may cause an automated cycle of operation of the hood furnace 100.
  • a pressure vessel 148 may also selectively enclose the transport gas fan 140.
  • the pressure vessel 148 advantageously serves as pressure protection if the transport gas path 118 can be operated at a pressure of, for example, 10 bar.
  • Other components of the transport gas path 118 may be pressure-resistant or may also be arranged inside a pressure vessel.
  • Fig. 1 also shows a control unit 166, which is set up for controlling and switching the individual components of the furnace 100, as indicated schematically by arrows in FIG.
  • FIG. 2 to FIG. 5 in which different operating states of the hood furnace 100 are shown, which are adjustable by appropriate control (with control unit 166) of the position of the fluidic valves 144, 146 and the electric switch 178. These components can be switched accordingly with a control unit 166.
  • the transport gas fan 140 is thermally coupled to the second annealing gas 114, so that the transport gas 116 removes heat from the second annealing gas 114 and supplies it to the first annealing gas 112.
  • thermal energy is transferred from the first annealing gas 112 to the second annealing gas 114.
  • the charge (the material to be annealed) of the base Sol is heated and the charge (the annealing material) of the second base So2 is cooled.
  • FIG. 3 shows a second operating state II of the hood furnace 100, which follows the first operating state I.
  • the second operating state II of the hood furnace 100
  • the first furnace chamber 104 electrically by a corresponding electrical path is closed.
  • the transport gas fan 140 supplies the transport gas 116 to the now connected cooler 142 for cooling the second annealing gas 114.
  • the now cooled transport gas 116 is thermally coupled to the second annealing gas 114 to the second
  • the charge (the annealing stock) of the first base Sol is thus further heated, whereas the charge (the annealing stock) of the second base So2 is further cooled.
  • the now heat-treated and now cooled charge of Glühgut 102 from the second Socket So2 removed.
  • a crane can remove the second protective hood 122, then remove the annealed material 102 arranged in the second base So2 and introduce a new batch of annealed material 102 into the second base So2.
  • Transport fluid fan 140 the transport fluid 116 thermally with the first annealing gas 112, so that the transport gas 116 takes the first annealing gas 112 heat and the second annealing gas 114 feeds.
  • the second furnace chamber 104 is preheated and the first furnace chamber 106 is pre-cooled.
  • a subsequent fourth operating state IV is activated, which is shown in FIG.
  • the tube bundle 110 with the electrical supply unit 124 electrically heats only the second oven chamber 106.
  • the electrical supply unit 124 electrically heats only the second oven chamber 106. In a separate fluidic path leads the
  • Transport fluid fan 140 the transport gas 116 now
  • the cooled transport gas 116 is thermally coupled to the first annealing gas 112 to further cool the first furnace space 104.
  • the charge (the material to be annealed) of the first base Sol is cooled further and the charge (the annealed material) of the second base So2 is further electrically heated.
  • a crane can remove the first protective hood 120, then remove the annealing stock 102 arranged in the first base Sol and introduce a new batch of annealed stock 102 into the first base Sol.
  • the cycle of operating states I to IV can start anew, that is to say. the hood furnace 100 is next again as shown in FIG. 2 operated.
  • Fig. 6 shows an enlarged view of a portion of the first base Sol of the hood furnace, from which the arrangement of the
  • Shell and tube heat exchanger 108 in full flow with inlet and outlet in detail shows.
  • the thermal insulation of the protective hood 120 is identified by the reference numeral 600.
  • the first annealing gas fan 130 is a radial fan whose impeller 602 is driven by a motor 604. Impeller 602 is enclosed by vanes 608 having vanes.
  • the annealing material 102 resting on the glow base which is indicated only schematically, is covered by the protective hood 120, which is supported via an annular flange 612, which ensures a gas-tight closure of the protective hood 120 via a circumferential seal 614.
  • Fig. 7 shows a bell annealing furnace 100 according to another exemplary embodiment of the invention.
  • an oven-external gas heating unit 700 is provided in the hood furnace 100 according to FIG. 7, instead of the electrically heated furnace-internal heat exchange bundles 108/110 with the electrical supply unit 124, an oven-external gas heating unit 700 is provided.
  • an oven-external heating unit alternatively also an electrical heating unit can be used.
  • the gas heating unit 700 is associated with a separate heating fan 704 which transports transport gas 116 heated by the gas heating unit 700 through a piping system. According to FIG. 7, transport gas 116 heated by the gas heating unit 700 is conveyed through the tube bundle heat exchangers 108, 110.
  • a control unit 702 is provided, which is formed via various control lines 720 for switching the various valves 144, 146 and for switching on or off the radiator 142, the gas heating unit 700 or the fans 140, 704.
  • the fan 140 can as Cold-pressure fan can be formed, whereas the fan 704 is a hot-pressure fan.
  • the gas heating unit 700 functions as a heater and is formed as a gas-heated heat exchanger for transferring thermal energy to the transport gas 116.
  • the area below the furnace bases 170, 172 in FIG. 7 may be wholly or partially mounted inside a high pressure container to provide protection against the high pressure in the transport gas system 118.
  • FIG. 8 to FIG. 11 show four operating states of the hood furnace 100 according to FIG. 7, which is functional to the operating states I to IV according to FIG. 2 to FIG. 5 correspond.
  • the radiator 142 is disconnected from the rest of the system.
  • the gas heating unit 700 is turned off. Heat is transferred from the second annealing gas 114 of the second pedestal So2 to the first annealing gas 112 in the first pedestal Sol.
  • the first base Sol is further heated by the gas heating unit 700 now switched on, while the cooler 142 is now activated in a separate other gas path and the second annealing gas 114 is actively further cooled in the second base So2.
  • the annealing material 102 can be removed from the second base So2 and replaced by a new,
  • FIG. 10 shows the third operating state III, in which thermal energy is now transferred from the first annealing gas 112 in the first base Sol to the second annealing gas 114 in the second base So2.
  • the radiator 142 and the gas heating unit 700 are turned off in this state.
  • Operating state III is then replaced by operating state IV, which is shown in FIG. 11.
  • operating state IV is the Radiator 142 activates and actively cools the first pedestal Sol further.
  • the second base So2 is actively heated further by means of the gas heating unit 700.
  • the annealing 102 can be removed from the first base sol and replaced by a new batch annealing 102.
  • Diagram 1200 and a second diagram 1250 are described.
  • the first graph 1200 has an abscissa 1202 along which the time is plotted while performing the operating conditions I to IV. Along an ordinate 1204, the temperature of the respective annealing gas or the Glühguts is plotted while performing the operating states I to IV.
  • the abscissa 1202 and the ordinate 1204 are also selected accordingly in the second diagram 1250.
  • the first diagram 1200 refers to a
  • Annealed the second base So2 during the operating states I to IV shown in FIG. 1 or FIG. 7 refers.
  • first operating state I thermal energy is transferred from the second annealing gas 114 in base So2 to the first annealing gas 112 in base Sol (first heat exchange WT1 with energy transfer E).
  • second operating state II the first base Sol is actively heated further with annealed material (H), whereas the second base So2 is actively cooled further actively with annealing material (K).
  • third operating state III is now thermal energy from the first annealing gas 112 and the Glühgut in the first base Sol to the second annealing gas 114 and the Glühgut in the second base So2 transferred (second heat exchange WT2 with energy transfer E).
  • second heat exchange WT2 with energy transfer E second heat exchange WT2 with energy transfer E.
  • the first base Sol is further actively cooled with annealed material, whereas the second base So2 is actively further heated with annealed material.
  • FIG. 12 the temperature profile in one
  • FIG. 13 shows a first diagram 1300, a second diagram 1320, a third diagram 1340 and a fourth diagram 1360 of a two-stage heat exchange system, in which, unlike in FIG. 1 and FIG. 7 two sockets, but three sockets are provided in a hood furnace.
  • a third base So3 is pre-cooled and transfers by means of the transport gas thermal energy from the third annealing gas to the first annealing gas to preheat a base sol.
  • a second pedestal So2 separated from the first and third pedestals in this operating state is heated to a final temperature by means of a heater.
  • the base So3 is actively cooled by means of a cooler, while the base now to be pre-cooled transfers thermal energy from its second annealing gas to the first annealing gas of the first base Sol.
  • the first base sol is further preheated.
  • the third base So3 is reheated by transferring thermal energy from the second base So2 to the third base So3 by means of the transport gas. This preheats the third base So3. Since the second base So2 transfers thermal energy of its second annealing gas to the third annealing gas of the third base So3, its energy decreases in the third operating state III.
  • the first base Sol is now isolated from the other bases So2 and So3 and is heated to a final temperature by means of a heater.
  • Base Sol pre-cooled by adding thermal energy from the first
  • Mixture gas is transferred to the third annealing gas of the base So3.
  • the third base So3 is further preheated.
  • the second base So2 is separated in a fourth operating state from the other two sockets Sol, So3 and is actively cooled further with a cooler, and then at the end of the fourth operating mode IV lower
  • the third pedestal So3 is activated and connected to the heating unit separately from the other pedestals Sol, So2, to be brought to the final temperature.
  • the further to be cooled base sol transfers thermal energy from its annealing gas to the second annealing gas of the second base So2.
  • the latter is thus subjected to a first preheating phase.
  • Fig. 13 thus refers to a two-stage heat exchange in a three-socket operation. Energy consumption can be reduced to 40%.
  • the construction of a corresponding furnace according to the invention is still simple, and yet it can be a high degree
  • FIG. 14 shows a schematic view of a furnace 1600 with generally n sockets according to another example
  • first socket Sol 1602 a first socket Sol 1602
  • second socket So2 1604 an n-th socket SoN 1606 are shown schematically.
  • the architecture according to FIG. 16 can be set to any number of
  • a plurality of one-way valves 144 are also shown in FIG. Further, a switchable cooling unit 142 and an external heating unit 700 (in this case, a gas heating unit, which is alternatively possible as an electric resistance heater) are shown. If the shell-and-tube heat exchanger is used directly, ie internally as electrical resistance heating, there is an electric socket per base
  • Supply unit 1241, 1242, ... 124n provided.
  • separate electrical supply units 1241, 1242, ... 124n per bundle can be provided.
  • a fan unit for WT1 or WT2 can be provided in each case.
  • Fig. 15 shows a bell-shaped protective hood 1700, as shown for example in Fig. 1 with reference numerals 120, 122.
  • the Protective hood 1700 has a continuous inner housing made of a heat-resistant material 1702 and, on the outside, a heat insulation 1704 in order to prevent the respective pedestal from losing heat through the protective hood 1700.
  • the configuration shown is advantageously used for a hood furnace.
  • FIG. 16 shows a top view of a hood furnace of the type shown in FIG. 6, in which a shell-and-tube heat exchanger 108 is directed (and preferably substantially fully) by means of a hot gas fan 130 with heated annealing gas.
  • a hot gas fan 130 with heated annealing gas for all operating conditions of the hood furnace, d .h. for heating a pedestal, for cooling a pedestal or heat exchange between pedestals, a good thermal coupling between the Glühgasventilator 130 and the tube bundle heat exchanger 108 can be ensured.
  • an impeller 1644 of the Glühgasventilators 130 is driven in rotation, see reference numeral 1642.
  • the annealing gas is circulated by the Glühgasventilator 130.
  • the annealing gas therefore moves outward under the influence of the stationary vanes 1640 of a nozzle.
  • the annealing gas reaches specifically in thermal interaction with the tube bundle heat exchanger 108 and on to the charge (Glühgut).
  • the tube bundle heat exchanger 108 is therefore in full flow.
  • “having” does not exclude other elements or steps and "a" or “an” does not exclude a multitude.
  • features or steps described with reference to one of the above embodiments also may be used in combination with other features or steps of other embodiments described above, and reference signs in the claims are not intended to be limiting.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Resistance Heating (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un four (100) de traitement thermique d'un produit à recuire (102). Le four (100) présente une première chambre de four (104) pouvant être fermée, conçue pour recevoir et traiter thermiquement un produit à recuire (102) au moyen d'une interaction thermique du produit à recuire (102) avec un premier gaz de recuit (112) qui peut être chauffé ou refroidi dans le premier espace de four (104), et une première cloche de protection amovible (120) qui permet de fermer la première chambre du four (104). En outre, un premier appareil d'échange de chaleur (108), qui se trouve au moins partiellement à l'intérieur de la première chambre du four (104) fermé par la première cloche de protection (120), est prévu pour échanger de la chaleur avec le premier gaz de recuit (112) à l'intérieur de la première cloche de protection (120). L'appareil d'échange de chaleur (108) est positionné de telle manière par rapport à un premier ventilateur de gaz de recuit (130) servant à entraîner le gaz de recuit, que dans chaque état de fonctionnement du four (100), le gaz de recuit entraîné par le premier ventilateur (130) passe dans l'appareil d'échange de chaleur (100).
EP12801549.2A 2011-12-14 2012-12-11 Four à cloche comportant un appareil émetteur de chaleur positionné à l'intérieur d'une cloche de protection, en particulier alimenté par une source d'énergie externe au four, pour transférer de la chaleur au gaz de recuit Withdrawn EP2791605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011088633A DE102011088633A1 (de) 2011-12-14 2011-12-14 Haubenofen mit innerhalb einer Schutzhaube positioniertem Wärmeabgabegerät, insbesondere gespeist von einer ofenraumexternen Energiequelle, zum Abgeben von Wärme an Glühgas
PCT/EP2012/075124 WO2013087646A1 (fr) 2011-12-14 2012-12-11 Four à cloche comportant un appareil émetteur de chaleur positionné à l'intérieur d'une cloche de protection, en particulier alimenté par une source d'énergie externe au four, pour transférer de la chaleur au gaz de recuit

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EP2791605A1 true EP2791605A1 (fr) 2014-10-22

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EP12801549.2A Withdrawn EP2791605A1 (fr) 2011-12-14 2012-12-11 Four à cloche comportant un appareil émetteur de chaleur positionné à l'intérieur d'une cloche de protection, en particulier alimenté par une source d'énergie externe au four, pour transférer de la chaleur au gaz de recuit

Country Status (10)

Country Link
US (1) US20140333015A1 (fr)
EP (1) EP2791605A1 (fr)
JP (1) JP2015507083A (fr)
KR (1) KR20140102305A (fr)
CN (1) CN104081145A (fr)
BR (1) BR112014014653A2 (fr)
CA (1) CA2859242A1 (fr)
DE (1) DE102011088633A1 (fr)
TW (1) TW201402829A (fr)
WO (1) WO2013087646A1 (fr)

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Publication number Priority date Publication date Assignee Title
SI2372281T1 (sl) * 2010-03-25 2014-02-28 Dronco Gmbh Peč za toplotno obdelavo večjega števila predmetov
DE102011088634B4 (de) * 2011-12-14 2014-07-31 Ebner Industrieofenbau Gmbh Geschlossenes Transportfluidsystem zum ofeninternen Wärmeaustausch zwischen Glühgasen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479102A (en) * 1946-02-23 1949-08-16 Carnegie Illinois Steel Corp Coil annealing furnace
ES398461A1 (es) * 1971-12-29 1975-06-01 Guinea Hermanos Ingenieros Sa Nuevo sistema para acelerar el enfriamiento de las cargas en los hornos de circulacion forzada de atmosfera controla- da.
GB1518100A (en) * 1975-10-31 1978-07-19 British Steel Corp Annealing process
US4247284A (en) * 1978-12-13 1981-01-27 Midland-Ross Corporation Internal cooling of heat exchanger tubes
CN1157329A (zh) * 1996-02-16 1997-08-20 彼得·H·埃布纳 罩式退火炉
AT411904B (de) * 2003-03-24 2004-07-26 Ebner Ind Ofenbau Haubenglühofen, insbesondere für stahlband- oder drahtbunde
KR100653617B1 (ko) * 2005-04-25 2006-12-05 에스엠메탈(주) 무산화용 벨타입 소둔로 구조
WO2010089056A2 (fr) * 2009-02-04 2010-08-12 Loi Thermprocess Gmbh Procédé et installation de traitement thermique de tôles
AT507423B1 (de) * 2009-03-25 2010-05-15 Ebner Ind Ofenbau Verfahren zum vorwärmen von glühgut in einer haubenglühanlage
AT508776B1 (de) * 2010-04-14 2011-04-15 Ebner Ind Ofenbau Verfahren zum vorwärmen von glühgut in einer haubenglühanlage
CN201864760U (zh) * 2010-11-23 2011-06-15 武汉钢铁(集团)公司 罩式退火炉用双向加热内罩
DE102011088634B4 (de) * 2011-12-14 2014-07-31 Ebner Industrieofenbau Gmbh Geschlossenes Transportfluidsystem zum ofeninternen Wärmeaustausch zwischen Glühgasen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013087646A1 *

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DE102011088633A1 (de) 2013-06-20
CA2859242A1 (fr) 2013-06-20
WO2013087646A1 (fr) 2013-06-20
JP2015507083A (ja) 2015-03-05
TW201402829A (zh) 2014-01-16
US20140333015A1 (en) 2014-11-13
BR112014014653A2 (pt) 2017-06-13
CN104081145A (zh) 2014-10-01
KR20140102305A (ko) 2014-08-21

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