EP3004404B1 - Dispositif et procédé de traitement thermique d'un matériau utile métallique sous atmosphère de gaz de protection/réaction en fonctionnement continu - Google Patents

Dispositif et procédé de traitement thermique d'un matériau utile métallique sous atmosphère de gaz de protection/réaction en fonctionnement continu Download PDF

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Publication number
EP3004404B1
EP3004404B1 EP14726595.3A EP14726595A EP3004404B1 EP 3004404 B1 EP3004404 B1 EP 3004404B1 EP 14726595 A EP14726595 A EP 14726595A EP 3004404 B1 EP3004404 B1 EP 3004404B1
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EP
European Patent Office
Prior art keywords
heating
zone
exhaust gas
gas
heat
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Application number
EP14726595.3A
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German (de)
English (en)
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EP3004404A1 (fr
Inventor
Klaus Schmitz
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Otto Junker GmbH
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Otto Junker GmbH
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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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • 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
    • C21D1/34—Methods of heating
    • C21D1/52—Methods of heating with flames
    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • F27B9/047—Furnaces with controlled atmosphere the atmosphere consisting of protective gases
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D99/0035—Heating indirectly through a radiant surface

Definitions

  • the invention relates to a device for heat treatment of metallic useful material under inert gas / reaction gas atmosphere in continuous operation with a furnace chamber surrounding a furnace as heating zone furnace housing and a plurality of protruding into the furnace chamber heating elements for heating the furnace chamber and with a heating zone upstream preheating zone, wherein the combustion gases do not come in contact with the Nutzgut and a method for operating such a device.
  • the furnace interior is filled for metallurgical reasons with a special protective gas or reaction gas, which is why the combustion exhaust gas must not get into the furnace interior 21.
  • the heating takes place indirectly, that is, the combustion takes place in special heating elements, namely in the furnace interior 21 closed and projecting into the furnace housing 22 so-called radiant tubes 24, which emit the heat of combustion on their outer surfaces to the furnace interior 21.
  • the furnace interior 21 usually consists of several modules 23, which are arranged directly behind one another and form a heating zone HZ.
  • the metallic useful material to be heated can, as in Fig. 3 represented, for example, from a metal strip M or even od by means of a transport device individually through the oven blocks, bolts, racks with resting support material.
  • a transport device individually through the oven blocks, bolts, racks with resting support material.
  • the combustion gases may not be introduced freely into the furnace housing 22, the known continuation of the combustion gases within the furnace interior 21 from the hotter zones to upstream zones at a lower temperature level, so-called preheating, is not possible and the exhaust gas of the burner 25 must be separated by separate exhaust pipes 26 be dissipated.
  • the invention is therefore based on the object, the above-mentioned and previously described in detail known devices and corresponding method for heat treatment of metallic Nutzgut under inert gas / reaction gas atmosphere in continuous operation in such a way and further develop that their efficiency is improved.
  • the object is achieved in that in a device according to the preamble of claim 1, a collecting device for collecting the exhaust gas of the heating elements and provided by the collecting device and arranged in the interior of the preheating zone heat transfer unit are provided. According to the invention, therefore, the waste heat of the exhaust gas of the heating elements can be used to preheat the metallic Nutzgutes in lying directly in front of the heating zone preheating without causing the mixing of exhaust gas and inert gas / reaction gas.
  • the associated method according to the preamble of claim 10 solves the problem in that the exiting the heating elements exhaust collected and the actual heating part upstream, exhaust-heated preheating zone is fed and there its heat via correspondingly provided with large surfaces heat transfer surfaces indirectly to that in the preheating contained protective gas / reaction gas transfers.
  • recuperative burners are provided for heating the heating zone as heating elements.
  • the heat transfer unit in the preheating zone is ribbed on one side or both sides and / or benoppt.
  • a further embodiment of the invention provides that the heat transfer unit is made in the preheating of a particularly thermally conductive material such as copper, copper alloys or aluminum.
  • heating zone is followed by a cooling element, in this case it is particularly expedient that are provided for heat recovery lines for the transport of hot air from the cooling element in the preheating zone in order to achieve an even greater increase in efficiency.
  • the process simulation used also simulates metallic influences in the useful material and incorporates them into the simulation process.
  • a further teaching of the invention envisages that the process simulation used directly relies on the operating and performance states of the exhaust-generating heating elements in the heating zone which are known in plant control.
  • a further embodiment of the invention provides that the protective gas / reaction gas temperature in the heating zone can be controlled by changing the amount of exhaust gas supplied via controllable valves, flaps or conveyors. The operation of the mechanical devices is done automatically by the plant control.
  • the protective gas / reaction gas temperature in the heating zone directly recalls the operating and performance states of the exhaust-generating heating elements in the heating zone which are known in plant control. As a result, an optimal control of the heat treatment process can be achieved.
  • the protective gas / reaction gas temperature in the exhaust-heated preheating zone can be increased by means of additional heating units or - alternatively - can be specifically regulated by means of additional cooling units or heating units.
  • Fig. 1 now shows a device for heat treatment of metallic Nutzgut, in the illustrated and insofar preferred embodiment of a metal strip M, which is moved in the direction of the arrow from left to right through a furnace chamber 1.
  • the furnace chamber 1 is enclosed by a furnace housing 2, and consists of a plurality of immediately successively arranged furnace modules 3, in each of which a heating element 4 protrudes.
  • the furnace modules 3 provided with the heating elements 4 form the actual heating zone HZ.
  • each heating element 4 a burner 5 is arranged, the exhaust gases are withdrawn through a separate exhaust pipe 6 and in this way can not come into contact with the interior of the furnace housing 2, which is filled for heat treatment with inert gas / reaction gas.
  • the heat of the exhaust gas withdrawn from the heating elements 4 is now also utilized, in which the exhaust gas lines 6 open into a collecting device 7, which in turn is connected via a line 8 to a heat transfer unit 9.
  • the heat transfer unit 9 is located in a preheating module 3 ', which forms the preheating zone of the device according to the invention. After the hot exhaust gas has flowed through the heat transfer unit 9 in the preheating module 3 ', it leaves the heat transfer unit 9 via an outlet 10.
  • the heating elements 4 can be designed as recuperative burners, regenerator burners, oxygen burners or cold air burners.
  • the heat transfer unit 9 not only has a special shape for achieving a large surface, but moreover, in accordance with a preferred embodiment of the invention, it is ribbed and / or padded on one or both sides.
  • the heat transfer unit 9 is preferably made of a particularly thermally conductive material such as copper, copper alloys or aluminum.
  • the device may optionally also have a cooling element 3 ", which is the heating zone HZ downstream and forms a cooling zone KZ.
  • Fig. 2 is opposite Fig. 1
  • the cooling zone KZ functions to such an extent that heated protective gas / reaction gas from the cooling element 3 "is conveyed through a conduit 11 by means of a cooling element 3"
  • Pump 12 is supplied to the preheating zone VZ, where it can preheat the entering into the furnace interior 1 metal strip M in the preheating module 3 '.
  • the cooled protective gas then leaves the preheating module 3 'via a further line 13 and flows back into the cooling element 3 ".
  • This additional' cycle 'allows a very precise temperature control and thus a high degree of automation in order to further improve the efficiency of the device.
  • Optimized process simulation and plant control ensure optimal energy utilization during heat treatment.
  • the metallic utility product may also be metal bodies moving on a conveyor through the oven interior 1, such as blocks, bolts or the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (17)

  1. Dispositif de traitement thermique d'un matériau utilitaire, métallique, sous atmosphère de gaz de protection / gaz de réaction, en fonctionnement continu, comprenant une enceinte de four (2), qui entoure une chambre de four (1) en tant que zone de chauffage (HZ), et une pluralité d'éléments de chauffage (4), qui font saillie dans la chambre de four (1) pour chauffer ladite chambre de four (1), ainsi qu'une zone de préchauffage (VZ), chauffée aux gaz d'échappement, qui est connectée en amont de la zone de chauffage (HZ), sachant que les gaz de combustion n'entrent pas en contact avec le matériau utilitaire,
    caractérisé en ce que
    le dispositif est, de plus, doté d'un système collecteur (7), qui est destiné à capter les gaz d'échappement des éléments de chauffage, et d'une unité de transfert thermique (9), qui est alimentée par le système collecteur (7) et est disposée à l'intérieur de la zone de préchauffage (VZ).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    des brûleurs à récupération sont prévus pour le chauffage de la zone de chauffage (HZ).
  3. Dispositif selon la revendication 1,
    caractérisé en ce que
    des brûleurs de régénération sont prévus pour le chauffage de la zone de chauffage (HZ).
  4. Dispositif selon la revendication 1,
    caractérisé en ce que
    des brûleurs à oxygène sont prévus pour le chauffage de la zone de chauffage (HZ).
  5. Dispositif selon la revendication 1,
    caractérisé en ce que
    des brûleurs à air froid sont prévus pour le chauffage de la zone de chauffage (HZ).
  6. Dispositif selon l'une des revendications 1 à 5,
    caractérisé en ce que
    l'unité de transfert thermique (9), dans la zone de préchauffage (VZ), est côtelée et / ou boulochée pour améliorer le transfert thermique.
  7. Dispositif selon l'une des revendications 1 à 6,
    caractérisé en ce que
    l'unité de transfert thermique (9), dans la zone de préchauffage (VZ), est fabriquée avec un matériau particulièrement conducteur de chaleur, tel que le cuivre, les alliages de cuivre ou l'aluminium, pour améliorer le transfert thermique.
  8. Dispositif selon l'une des revendications 1 à 7,
    caractérisé en ce que
    un élément de refroidissement (3") est connecté en aval de la zone de chauffage (HZ).
  9. Dispositif selon la revendication 8,
    caractérisé en ce que
    pour la récupération de la chaleur, des conduites (11, 13) sont prévues pour le transport d'air chaud de l'élément de refroidissement (3") à la zone de préchauffage (VZ).
  10. Procédé de traitement thermique d'un matériau utilitaire, métallique, sous atmosphère de gaz de protection / gaz de réaction, en fonctionnement continu, sachant que le matériau utilitaire est chauffé dans une chambre de four au moyen d'éléments de chauffage, qui font saillie dans la chambre de four, et sachant que les gaz de combustion n'entrent pas en contact avec le matériau utilitaire,
    caractérisé en ce que
    le gaz d'échappement, s'échappant des éléments de chauffage, est capté et conduit à une zone de préchauffage (VZ) chauffée aux gaz d'échappement, qui est montée en amont de la partie de chauffage proprement dite, et, là, par l'intermédiaire de surfaces de transfert thermique, transmet indirectement sa chaleur au gaz de protection / gaz de réaction, contenu dans la zone de préchauffage.
  11. Procédé selon la revendication 10,
    caractérisé en ce que
    des fluctuations dynamiques des températures de traitement thermique sont compensées automatiquement, à l'aide d'une simulation de processus, en particulier au départ.
  12. Procédé selon la revendication 11,
    caractérisé en ce que
    la simulation de processus utilisée simule et intègre aussi des influences métallurgiques dans le matériau utilitaire.
  13. Procédé selon revendication 11 ou 12,
    caractérisé en ce que
    la simulation de processus utilisée recourt directement aux états de fonctionnement et de puissance des éléments de chauffage générant des gaz d'échappement dans la zone de chauffage, qui sont connus dans la commande de l'installation.
  14. Procédé selon l'une des revendications 10 à 13,
    caractérisé en ce que
    la température du gaz de protection / gaz de réaction, dans la zone de chauffage, peut être régulée par modification de la quantité de gaz d'échappement amenée, par l'intermédiaire de soupapes, de clapets ou de dispositifs de transport réglables.
  15. Procédé selon l'une des revendications 10 à 14,
    caractérisé en ce que
    la température du gaz de protection / gaz de réaction dans la zone de chauffage se réfère directement aux états de fonctionnement et de puissance des éléments de chauffage générant des gaz d'échappement dans la zone de chauffage, connus dans la commande de l'installation.
  16. Procédé selon l'une des revendications 10 à 15,
    caractérisé en ce que
    la température du gaz de protection / gaz de réaction peut être encore augmentée dans la zone de préchauffage, chauffée par les gaz d'échappement, au moyen d'unités de chauffages supplémentaires.
  17. Procédé selon l'une des revendications 10 à 16,
    caractérisé en ce que
    la température du gaz de protection / gaz de réaction dans la zone de préchauffage peut être régulée de manière appropriée au moyen d'unités de refroidissement ou, respectivement, d'unités de chauffages supplémentaires.
EP14726595.3A 2013-05-29 2014-05-26 Dispositif et procédé de traitement thermique d'un matériau utile métallique sous atmosphère de gaz de protection/réaction en fonctionnement continu Active EP3004404B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013105543.5A DE102013105543A1 (de) 2013-05-29 2013-05-29 Vorrichtung und Verfahren zur Wärmebehandlung von metallischem Nutzgut unter Schutzgas-/Reaktionsgasatmosphäre im Durchlaufbetrieb
PCT/EP2014/060859 WO2014191368A1 (fr) 2013-05-29 2014-05-26 Dispositif et procédé de traitement thermique d'un matériau utile métallique sous atmosphère de gaz de protection/réaction en fonctionnement continu

Publications (2)

Publication Number Publication Date
EP3004404A1 EP3004404A1 (fr) 2016-04-13
EP3004404B1 true EP3004404B1 (fr) 2017-02-22

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EP14726595.3A Active EP3004404B1 (fr) 2013-05-29 2014-05-26 Dispositif et procédé de traitement thermique d'un matériau utile métallique sous atmosphère de gaz de protection/réaction en fonctionnement continu

Country Status (3)

Country Link
EP (1) EP3004404B1 (fr)
DE (2) DE102013105543A1 (fr)
WO (1) WO2014191368A1 (fr)

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US12044402B2 (en) 2017-07-13 2024-07-23 Andritz Technology And Asset Management Gmbh Method for reducing nitrogen oxides in strip heat treatment furnaces

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CN112831636A (zh) * 2020-11-27 2021-05-25 河北永洋特钢集团有限公司 货叉扁钢专用热处理装置
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Publication number Priority date Publication date Assignee Title
US12044402B2 (en) 2017-07-13 2024-07-23 Andritz Technology And Asset Management Gmbh Method for reducing nitrogen oxides in strip heat treatment furnaces

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Publication number Publication date
EP3004404A1 (fr) 2016-04-13
WO2014191368A1 (fr) 2014-12-04
DE102013105543A1 (de) 2014-12-04
DE202013102749U1 (de) 2013-10-17

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