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WO2025099777A1 - Appareil de refroidissement pour four métallurgique et four correspondant - Google Patents

Appareil de refroidissement pour four métallurgique et four correspondant Download PDF

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Publication number
WO2025099777A1
WO2025099777A1 PCT/IT2024/050220 IT2024050220W WO2025099777A1 WO 2025099777 A1 WO2025099777 A1 WO 2025099777A1 IT 2024050220 W IT2024050220 W IT 2024050220W WO 2025099777 A1 WO2025099777 A1 WO 2025099777A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzles
perimeter wall
coolant fluid
cooling
cooling module
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.)
Pending
Application number
PCT/IT2024/050220
Other languages
English (en)
Inventor
Massimo VARUTTI
Marco Ansoldi
Stefano Terlicher
Luca BLARZINO
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.)
Danieli and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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 Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Publication of WO2025099777A1 publication Critical patent/WO2025099777A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/24—Cooling arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F27D2009/0016—Water-spray
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0064—Cooling of furnace arches
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0067—Cooling element inlet and outlet tubes

Definitions

  • the present invention concerns a cooling apparatus for a metallurgical furnace, such as for example an electric arc furnace (EAF), and the furnace itself. More specifically, the present invention concens a cooling apparatus integrated with the walls, and possibly with the vault, of the metallurgical furnace.
  • This apparatus is formed by a containing structure inside which nozzles, fed with a coolant fluid, are installed which, through spraying, define a certain heat exchange, keeping the temperature of the wall that faces toward the inside of the metallurgical furnace within adequate limits.
  • a traditional metallurgical furnace such as a known electric arc furnace for example, has a perimeter wall and a vault, both made of refractory material, on which cooling apparatuses are installed, provided to perform a desired heat exchange.
  • known cooling apparatuses are fed with a coolant fluid, normally water, in turn fed by a suitable feeding system.
  • a coolant fluid normally water
  • the cooling apparatuses can comprise coils of pipes inside which the coolant fluid flows, or they can have one or more box-shaped elements to house a plurality of nozzles inside them, which are capable of spraying the coolant fluid against a surface of the furnace’s wall, the latter directly facing the furnace’s melting chamber.
  • the solution with nozzles provides that the coolant fluid is fed at low pressure, approximately around atmospheric pressure, so even in the event of fluid leakages, the risks are more controlled than in the case of leakages from the coil panels where the fluid is at high pressure.
  • the coolant fluid In order to guarantee this type of solution operates optimally, it is necessary for the coolant fluid to be sprayed substantially uniformly against the walls of the panels, in order to obtain a removal of the heat above a desired minimum value.
  • the nozzles are housed inside the box-shaped elements, and therefore not directly in view, in the event of malfunction, or obstruction, of one or more nozzles, a localized cooling loss can occur in one or more areas, not immediately identifiable.
  • One purpose of the present invention is to provide a low-pressure cooling apparatus for a metallurgical furnace that, even in the event of malfunctions or obstructions of one or more nozzles, is capable of guaranteeing a cooling efficiency above a certain minimum value.
  • Another purpose of the present invention is to provide a metallurgical furnace, in particular an electric arc furnace, equipped with the aforementioned cooling apparatus with nozzles.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a cooling apparatus is applied to a metallurgical furnace, of the type provided at east with a container having, in turn, at least one perimeter wall that internally defines a melting chamber, in which a metal charge can be selectively inserted for subsequent melting.
  • the cooling apparatus according to the present invention comprises at least one cooling module, which is associated with the perimeter wall and is provided with a plurality of nozzles inside it.
  • associated with the perimeter wall we mean both as an external element, that is, attached to and in operational cooperation with the wall, and also as an integral part of the wall, for example to define an operational hollow space in which the nozzles operate.
  • a single cooling module can be provided that affects the entire perimeter wall, and also, alternatively, that several modules coupled together can be provided.
  • each of the nozzles is arranged to define a spraying cone having a certain angle of amplitude a and is positioned at a first distance DI from an adjacent nozzle.
  • the ratio between the angle of amplitude a and the first distance DI can be chosen so that each spraying cone defines a spray area on the first element and an intersection, or partial overlap, portion with a spray area defined by the adjacent nozzle.
  • the at least one cooling module comprises feeding lines of the coolant fluid, to which the nozzles are hydraulically connected, the feeding lines being arranged so as to define a plurality of rows, or columns, of nozzles and being hydraulically connected to at least one coolant fluid feeding manifold, the manifold being annular and positioned, during use, along the perimeter wall.
  • the present invention there is a distribution substantially over the entire portion of the first element affected by the action of the cooling module, thus improving the reliability and efficiency of the cooling performed. Furthermore, with the present solution, by guaranteeing a dense spraying density on the first element, even in the event of malfunction or obstruction of one or more nozzles, it is possible to achieve cooling with an efficiency above a certain minimum value. In fact, in these cases, the interference portions allow to at least partly compensate for the lack of cooling of one or more adjacent nozzles, so as to limit the increase in temperatures to a minimum and, consequently, the possibility of negatively interfering in the melting steps, or operationally compromising some components of the furnace.
  • the present solution guarantees a high effectiveness and speed of distribution of the coolant fluid to the nozzles, which allows to further increase the spraying density and uniformity.
  • each feeding line can be selectively isolated from the other feeding lines by means of corresponding closing valves, so as to possibly feed single rows and/or columns of nozzles, or groups of rows and/or columns of nozzles, with coolant fluid.
  • columns of nozzles located in succession are separated by a first distance
  • rows of nozzles located in succession are separated by a second distance, the first distance and the second distance being such as to allow high intersection portions, in which three or more spray areas overlap.
  • the first distance is comprised between 300 mm and 400 mm and the second distance is comprised between 350 mm and 500 mm.
  • the feeding lines comprise lateral branches which carry the coolant fluid to the nozzles.
  • the ratio between the angle of amplitude a and the first distance DI is chosen so as to guarantee that the intersection portion between two adjacent spraying cones has a surface area comprised between approximately 5% and approximately 65% of each spray area.
  • this percentage is approximately 30%. The choice of this specific percentage range, together with the other interference portions that are defined between all the spray areas, further guarantees effective and uniform cooling of the first element of the perimeter wall.
  • the cooling module can be associated with the closing vault, together with, or as an alternative to, the perimeter wall, and each of its nozzles is arranged to define a spraying cone of the coolant fluid against the second element; also in this case, there is defined a spray area and an intersection portion with the spray area of the spraying cone of an adjacent nozzle.
  • each of the nozzles is positioned at a second distance D2 from the first element, comprised between 150 mm and 300 mm.
  • the nozzles all come to be substantially at the same distance from the first element, thus being able to guarantee a uniformity of cooling action on the first element itself, to the advantage of the quality and repeatability over time of the cooling action.
  • the second distance D2 if modified, can also influence the amplitude of the spray area and, therefore, the intersection portions that come to be defined between two adjacent spray areas, increasing the possible design choices as a function of the metallurgical furnace’s specific operating conditions.
  • one or more parameters that define the spray area can be selectively, and possibly individually, modified to achieve different operating conditions, for example, in order to compensate for a nozzle malfunction, or to punctually intensify the cooling action in a desired position of the perimeter wall, or other.
  • the nozzles of a same cooling module are fed individually or in groups by one or more coolant fluid feeding lines, and each group comprises a number of nozzles comprised between five and eleven, which can also be different from one cooling module to a possible other.
  • a plurality of rows or columns of nozzles can be arranged within each individual cooling module, disposed substantially parallel to each other with a matrix, quincunx, or other layout.
  • each row or column can be fed individually or in groups, by means of specific feeding lines, so as to define, within the same cooling module, different cooling zones of the first or second element.
  • the solution according to the present invention therefore allows to carry out a heat extraction that is managed independently depending on the zone of the furnace being cooled.
  • each cooling module can be fed individually and with different operating conditions, or conditions that can be differentiated from the others, and comprises a circuit for the collection and evacuation of the waste coolant fluid.
  • the apparatus comprises at least one temperature detection element, arranged to detect the cooling temperature of the perimeter wall.
  • the installation points of the detection elements are those with the greatest exposure to the electrodes, therefore those that define the shortest distance in a straight line between the cooling module and the electrode.
  • each cooling module or group of cooling modules can be monitored to verify whether the cooling is occurring properly.
  • a command and control unit can also be provided, which is connected to the detection elements so as to compare the data detected by each detection element, for example, with a system datum, and give this comparison to an operator or to a computer programmed in order to keep the operating parameters of the metallurgical furnace within certain limits.
  • the present invention also concerns a metallurgical furnace provided with at least one container having at least one perimeter wall which internally defines a melting chamber.
  • a cooling apparatus provided at least with a cooling module, which is associated with the perimeter wall.
  • the cooling module is provided with a plurality of nozzles fed with a coolant fluid and arranged to spray the coolant fluid against a first element of the perimeter wall, which directly faces the melting chamber.
  • each of the nozzles is arranged to define a spraying cone having a certain angle of amplitude a and is positioned at a first distance DI from an adjacent nozzle.
  • the ratio between the angle of amplitude a and at least the first distance D 1 is such that each spraying cone defines a spray area on the first element and an intersection portion with a spray area of the spraying cone of the adjacent nozzle.
  • the at least one cooling module comprises feeding lines of the coolant fluid to which the nozzles are hydraulically connected, the feeding lines being arranged so as to define a plurality of rows, or columns, of nozzles and being hydraulically connected to at least one coolant fluid feeding manifold, the manifold being annular and positioned, during use, along the perimeter wall.
  • the furnace comprises a single cooling module integrated into a hollow space of the perimeter wall, the hollow space being defined, at least on one side, by the first element.
  • the manifold is disposed circularly inside the hollow space and is open toward the outside of the perimeter wall, by means of at least one pipe union.
  • one or more inspection doors are provided on the perimeter wall of the furnace’s container to allow the inspection of the cooling module/s, or parts thereof.
  • - fig. 1 is a schematic representation of a metallurgical furnace to which a cooling apparatus according to the present invention is applied;
  • - fig. 2 is a partial perspective view of the furnace of fig. 1 ;
  • - fig. 3 is the enlarged detail III of fig. 1 ;
  • - fig. 4 is a view from IV of fig. 1 ;
  • - fig. 5 schematically shows an operating condition of the cooling apparatus of fig. 1 ;
  • - fig. 6 schematically shows a first operating alternative of fig. 5;
  • a cooling apparatus 10 is applied for cooling, or at least for carrying out a cooling heat exchange, of desired internal areas of a metallurgical furnace 100, in this specific case an electric arc furnace (EAF), in particular during the melting steps of the metal material, in order both to reduce the wear of the parts of the furnace 100, and also to increase the efficiency of the melting process that is taking place inside the furnace 100.
  • EAF electric arc furnace
  • the furnace 100 comprises a container 110 with a substantially cylindrical shape and having a lower vat 120, a perimeter wall 130 disposed above the vat 120 and open at the top, and a vault 150 of the selectively openable type placed so as to close the perimeter wall 130, through which the electrodes 300 can at least partly pass.
  • the cross-section of the container 110 can have shapes other than circular, for example oval.
  • the container 110 internally defines, as a whole, a melting chamber 160 in which a metal charge M can be selectively inserted for the subsequent melting, and in which the combustion fumes deriving from the melting process circulate.
  • the vat 120 has a concave bottom, which in the wear zone is made of refractory material, capable of withstanding high temperatures, above l,600°C, and the melting of the metal charge M takes place inside it.
  • the vat 120 as in the prior art, is normally provided with a tapping hole through which the molten and scorified steel can be selectively tapped.
  • the perimeter wall 130 comprises, or consists of, a first element, or panel 200, in this specific case substantially cylindrical, and which directly faces the melting chamber 160 with an internal surface 210 thereof.
  • An external surface 220 is provided opposite the latter.
  • the vault 150 comprises, or consists of, a second element, or panel 250 having an internal surface 260 directly facing the melting chamber 160, and an external surface 270 opposite the internal surface 260, which can also be realized with one or more panels connected to each other.
  • the apparatus 10 comprises a single cooling module 11, which is integrated into a hollow space 12 of the perimeter wall 130 defined, at least on one side, by the panel 200.
  • the perimeter wall In the solution shown, it is therefore provided that the perimeter wall
  • a plurality of cooling modules 11 are provided, for example in number between two and seven, advantageously five, deliberately distributed on the perimeter wall 130. It is not excluded that the single, or the plurality, of cooling modules 11 can be applied externally to the perimeter wall 130, although always in direct cooperation with the panel 200.
  • one or more inspection doors 13 are provided on the perimeter wall 130, provided to allow operators a direct inspection of the cooling module(s) 11 , or parts thereof, for example in case of operational maneuvering, maintenance, or other.
  • the cooling module(s) 11 can also be effectively associated with the vault 150, in direct cooperation with the panel 250, and with the same spraying operating characteristics described with regards to the application to the perimeter wall 130.
  • the cooling module 11 comprises a plurality of nozzles 15, fed with a low- pressure coolant fluid, and arranged to spray this coolant fluid directly against the external surface 220 of the panel 200.
  • each nozzle 15 is arranged to define a spraying cone 16 having a certain angle a of amplitude, for example comprised between 90° and
  • each nozzle 15 is also disposed at a second distance D2, for example comprised between 150 mm and 300 mm, advantageously between 190 mm and 210 mm, from the panel 200 and at a distance D3, for example comprised between 350 mm and 500 mm, advantageously between 420 mm and 460 mm, from an adjacent upper or lower row of nozzles 15.
  • each spraying cone 16 defines a spray area 17 (figs. 4, 5 and 6) on the external surface 220 of the panel 200, and an intersection portion 19 with a spray area 17 defined by a spraying cone 16 of an adjacent nozzle 15.
  • each intersection portion 19 has a surface area comprised at least between about 5% and about 65%, advantageously 30%, of each spray area 17.
  • the cooling module 11 also comprises feeding lines 20 of the coolant fluid, to which the nozzles 15 are hydraulically connected.
  • the cooling module 11 can comprise a variable number of both feeding lines 20 and also of nozzles 15, for example comprised between five and eleven.
  • the number of nozzles for each cooling module 11 can also differ from one cooling module 11 to another, as a function of the thermal extraction arrangements provided.
  • Each feeding line 20 can feed one or more pairs of nozzles 15 located on opposite sides thereof, see fig. 2 or fig. 4.
  • the feeding line 20 therefore substantially comprises lateral branches 28 (fig. 4) which carry the coolant fluid to the nozzles 15 and allow, for example, to position the nozzles 15 in desired cooling zones of the furnace and to distribute the coolant fluid effectively.
  • each feeding line 20 is, in turn, fed by at least one substantially annular manifold 21 positioned, during use, along the perimeter wall 130.
  • the feeding lines 20 are therefore hydraulically connected to the manifold 21.
  • the manifold 21 is, in particular, disposed circularly inside the hollow space 12 and is open toward the outside of the perimeter wall 130, by means of a pipe union 22.
  • the latter is hydraulically connected to feeding means of the coolant fluid, of a substantially known type and not shown in the attached drawings.
  • each feeding line 20 is able to be selectively isolated from the other feeding lines 20 by means of corresponding closing valves 23, by means of which the flow rate of the coolant fluid can be regulated, and even interrupted.
  • the inspection doors 13 are provided in correspondence with the closing valves 23, so as to optimize the manipulation and maintenance operations thereof.
  • the feeding lines 20 can be arranged to define a plurality of rows X, or columns Y, of nozzles 15, the latter being disposed substantially parallel to each other with a matrix (fig. 5), or quincunx (fig. 6), or other layout.
  • the distance DI defines the space between two parallel columns Y located in succession, while the distance D3 defines the space between two parallel rows X located in succession.
  • the distances DI and D3 between the nozzles 15 can be chosen so as to define high intersection portions 19a, in which three or more spray areas 17 overlap, further increasing the efficiency and uniformity of the cooling performed.
  • each row X, or column Y can be fed individually or in groups, so as to define, within the same cooling module 11, different cooling zones.
  • the cooling module 11 comprises, in the lower part of the hollow space 12, at least one circuit for the collection and evacuation of the waste coolant fluid, shown schematically in the attached drawings with only the outlet pipe coupling 25, from which the fluid exits to be sent to its collection.
  • the apparatus 10 comprises at least one temperature detection element 26, of a substantially known type and only schematized in fig. 3.
  • This detection element 26 is arranged to detect the cooling temperature of the perimeter wall, and it is connected to a command and control unit 27 so that the latter makes a comparison between the data detected and predetermined system data, so as to alert a user device, and possibly intervene on the process steps of the furnace 100, or of the apparatus 10.
  • the detection elements 26 can be installed on the panel 200 at points of greater exposure with respect to the electrodes 300, and therefore at the shortest distance in a straight line between the panel 200 and each electrode 300.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

La présente invention concerne un appareil de refroidissement (10) pour un four métallurgique (100), dans lequel au moins un récipient (110) est pourvu d'au moins une paroi périphérique (130), l'appareil (10) comprenant au moins un module de refroidissement (11) associé au moins à la paroi périphérique (130) et pourvu à l'intérieur d'une pluralité de buses (15) agencées pour pulvériser le fluide de refroidissement avec lequel elles sont alimentées contre un premier élément (200) de la paroi périphérique (130) faisant directement face à la chambre de fusion (160) ; chacune desdites buses (15) est agencée pour définir un cône de pulvérisation (16) du fluide de refroidissement contre le premier élément (200) avec un certain angle (a) d'amplitude et est positionnée à une première distance (DI) d'une buse adjacente (15), au moins le rapport entre l'angle (a) et la première distance (DI) est tel que chaque cône de pulvérisation (16) définit une zone de pulvérisation (17) sur le premier élément (200) et une partie d'intersection (19) avec le cône de pulvérisation (16) de la buse adjacente (15).
PCT/IT2024/050220 2023-11-09 2024-10-30 Appareil de refroidissement pour four métallurgique et four correspondant Pending WO2025099777A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000023610A IT202300023610A1 (it) 2023-11-09 2023-11-09 Apparato di raffreddamento per un forno metallurgico e relativo forno
IT102023000023610 2023-11-09

Publications (1)

Publication Number Publication Date
WO2025099777A1 true WO2025099777A1 (fr) 2025-05-15

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ID=89897942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2024/050220 Pending WO2025099777A1 (fr) 2023-11-09 2024-10-30 Appareil de refroidissement pour four métallurgique et four correspondant

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IT (1) IT202300023610A1 (fr)
WO (1) WO2025099777A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044512A1 (fr) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique
JPH0395391A (ja) * 1989-09-06 1991-04-19 Daido Steel Co Ltd 炉蓋
JPH0755363A (ja) * 1993-08-19 1995-03-03 Daido Steel Co Ltd 高温ガスダクト
US5601427A (en) * 1994-07-25 1997-02-11 Daidotokushuko Kabushikikaisha Waste melting furnace and a method of melting wastes
EP0393970B2 (fr) * 1989-04-20 1999-03-17 Davy Mckee (Stockton) Limited Refroidissement de parties chaudes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044512A1 (fr) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique
EP0393970B2 (fr) * 1989-04-20 1999-03-17 Davy Mckee (Stockton) Limited Refroidissement de parties chaudes
JPH0395391A (ja) * 1989-09-06 1991-04-19 Daido Steel Co Ltd 炉蓋
JPH0755363A (ja) * 1993-08-19 1995-03-03 Daido Steel Co Ltd 高温ガスダクト
US5601427A (en) * 1994-07-25 1997-02-11 Daidotokushuko Kabushikikaisha Waste melting furnace and a method of melting wastes

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Publication number Publication date
IT202300023610A1 (it) 2025-05-09

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