EP3540350B1 - Wassergekühlter kasten für einen ofen zur metallherstellung - Google Patents

Wassergekühlter kasten für einen ofen zur metallherstellung Download PDF

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Publication number
EP3540350B1
EP3540350B1 EP19162911.2A EP19162911A EP3540350B1 EP 3540350 B1 EP3540350 B1 EP 3540350B1 EP 19162911 A EP19162911 A EP 19162911A EP 3540350 B1 EP3540350 B1 EP 3540350B1
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EP
European Patent Office
Prior art keywords
outer shell
flexible joint
shell
water cooled
cooled box
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.)
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Application number
EP19162911.2A
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English (en)
French (fr)
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EP3540350A1 (de
Inventor
Thomas M. Kovacic
Kenneth W. Geibel
Edward J. Green
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Berry Metal Co
Original Assignee
Berry Metal Co
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Publication date
Priority claimed from US15/922,608 external-priority patent/US10962287B2/en
Application filed by Berry Metal Co filed Critical Berry Metal Co
Publication of EP3540350A1 publication Critical patent/EP3540350A1/de
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Publication of EP3540350B1 publication Critical patent/EP3540350B1/de
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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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to 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
    • F27D2009/004—Cooling of furnaces the cooling medium passing a waterbox
    • F27D2009/0043—Insert type waterbox, e.g. cylindrical or flat type
    • 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
    • F27D2009/0056—Use of high thermoconductive elements
    • F27D2009/0062—Use of high thermoconductive elements made from copper or copper alloy

Definitions

  • This technology relates to water cooled boxes that are installed in a side wall of a metal making furnace for the general purpose of housing and protecting various implements used to affect the contents (i.e., a molten metal bath) of the furnace.
  • Metal making furnaces operate under severe conditions. For example, high mechanical stresses are exerted, particularly in furnace vessels, when large amounts of metal scrap weighing many tons are dumped from above into the vessel. The mechanical stress is further compounded by tilting of the vessel to pour the molten metal. Even more significantly, metal making furnaces are exposed to extremely stressful thermal conditions.
  • the temperature around electrodes in an electric arc furnace (“EAF”) can reach 6000 degrees Celsius (“°C”), or approximately 11,000 degree Fahrenheit (“°F”).
  • the furnace must withstand frequent and vast temperature fluctuations as an EAF furnace can be cycled (i.e., filled with scrap, drained of the melt, and filled, and prepare for filling with scrap again) more than once per hour.
  • Numerous types of water cooled boxes are known. They typically comprise a metal enclosure generally including, but not limited to, the shape of a truncated pyramid mostly of rectangular cross section. The interior of the enclosure is typically arranged to have an inlet and an outlet for cooling water that is circulated through the enclosure for the purpose of cooling the box. In view of their general “box” shape and circulating cooling water, these devices are commonly referred to as “cooling boxes.”
  • Metal making furnaces of the prior art have openings in the vessel wall of the furnace to accommodate these cooling boxes.
  • the cooling boxes are mounted in the openings, whereby the boxes generally extend inwardly toward the inner diameter of the vessel wall.
  • the boxes typically further comprise a nose that, when the box is mounted in the wall, is typically provided in an orientation that faces and is proximal to the molten metal in the vessel.
  • the nose of the box is generally located in such a way as to house a device, such as a burner, a lance, or a material (i.e., carbon or lime) injection device, closer to the metal bath to increase the efficiency of the melting or injection process, as the case may be. The closer the injection is to the bath, the deeper the heat, oxygen, or material penetrates into the bath.
  • EP 3 480 543 A2 discloses a housing for an auxiliary burner used in metal melting, refining and processing, for example, steel making in an electric arc furnace (EAF) or blast furnace, which comprises an internal cartridge with a plurality of ports and made from a first material, and an external housing made from a second material.
  • EAF electric arc furnace
  • GB 1 451 601 A discloses a fuel-fired burner comprising a cooling air duct formed in a space between an inner tube and an outer tube made of a high-temperature resisting materials
  • US 7 824 604 B2 discloses a tapered furnace burner panel extending away from a furnace wall and having a plurality of v-shaped grooves.
  • cooling boxes are made from steel, such that they are easy to manufacture and may be welded without substantial difficulty. Additionally, cooling boxes comprised of steel are relatively inexpensive. However, the lifespan of steel boxes is short because the low thermal conductivity of the steel, which allows it to overheat and ultimately deteriorate by way of thermal cracking. A consequence of thermal cracking is the possibility that cooling water will be permitted to leak into the melt, which can result in an explosion.
  • the present invention comprises a water cooled box for installation in a metal making furnace, wherein the box can accommodate the thermal stresses inherent in the metal making process without cracking, while also having a cost of manufacture that is significantly less than that of a primarily copper box.
  • a preferred water cooled box according to the present invention comprises a water cooled box for a metal making furnace, the water cooled box comprising: (i) a preferably U-shaped copper outer shell; (ii) a preferably U-shaped steel inner shell liner; (iii) the shell and the liner being welded together to form a chamber through which cooling water passes; (iv) at least one inlet and one outlet water connection to the chamber; (v) one or more conduit passages between the copper shell and the steel shell for mounting devices used to access the metal bath; (vi) a flexible joint where the conduit passage is attached to one of the shells; (vii) the copper shell further comprising slag bars for slag retention on the copper shell; (viii) the steel shell further comprising a flange for mounting the water cooled box into a wall of the furnace; and (ix) the chamber between the copper shell and the steel shell comprising water baffles to direct the water flow in the chamber in a
  • the flexible joint may be comprised of a diaphragm flexible joint, which is preferably one or more thin, high-strength metallic diaphragms that reduce restraint in both the radial and axial direction of the conduit passageways.
  • the flexible joint may be comprised of one or more thin, high-strength cans that allow deformation in the high-strength can that reduces restraint on the conduit passageways.
  • the flexible joint may be comprised of a bellows with one or more bellows convolutions that reduce restraint in both the radial and axial directions between the copper shell and the steel shell.
  • the flexible joint may be comprised of a thinned flange on either the bath facing side of the outer shell or the inner shell facing side of the outer shell, the flexible joint reducing radial restraint between the shells.
  • One of the benefits of the present invention is the ability to separate and replace either of the outer or inner shell if one of the shells should become worn or damaged.
  • the preservation and reuse of the non-damaged shell provides a significant economic benefit over traditional water cooled boxes.
  • the present invention comprises: a water cooled box for use in a metal making furnace, the water cooled box comprising:
  • the present invention provides: a water cooled box for use in a metal making furnace, the water cooled box comprising:
  • a water cooled box for use in a metal making furnace, the water cooled box comprising:
  • the outer shell is primarily comprised of copper.
  • the inner shell is primarily comprised of steel.
  • the outer shell further comprises one or more slag retention bars.
  • the outer shell further comprises one or more slag retention grooves.
  • both of the at least one conduit passageway of the inner shell and the at least one conduit passageway of the outer shell comprise a flexible joint.
  • the outer shell comprises at least two conduit passageways and the inner shell comprises at least two conduit passageways, a water inlet, and a water outlet.
  • the outer shell and inner shell are also joined at the at least one conduit passageway of the outer shell and the at least one conduit passageway of the inner shell, the conduit passageways being complementary structures through which an implement may be deployed.
  • the implement is selected from the group consisting of a burner, lance, or material injector.
  • the metal making furnace may comprise an inner diameter defined by the vessel wall of the furnace, and when the box is mounted at the vessel wall, the box may extend within the inner diameter toward the center of the furnace.
  • the outer shell comprises a curved face defined by the curved portion of the U-shaped cross-section, the curved face extending within the inner diameter and facing the center of the furnace when the box is mounted at a vessel wall of the furnace.
  • the at least one flexible joint of the inner shell is a diaphragm flexible joint.
  • the at least one flexible joint of the inner shell is a can flexible joint.
  • the at least one flexible joint of the outer shell is a bellows flexible joint.
  • the inner shell comprises both a diaphragm flexible joint and a can flexible joint
  • the at least one flexible joint of the outer shell comprises a bellows flexible joint
  • the at least one flexible joint of the outer shell comprises a flange flexible joint formed of material that is thinner than the metal material comprising the outer shell.
  • a water cooled box for use in a metal making furnace, the water cooled box comprising:
  • the at least one flexible joint of the inner shell is a diaphragm flexible joint.
  • the at least one flexible joint of the inner shell is a can flexible joint.
  • Fig. 1 illustrates a water cooled box 1 provided in accordance with a preferred embodiment of the present invention, the water cooled box 1 being installed in a metal making furnace 2.
  • the furnace 2 further comprises a vessel 3, a vessel wall 4, and, during normal operation of the furnace 2, a molten metal bath 5 contained by the vessel 3.
  • the box 1 is preferably mounted on the vessel wall 4 of the metal making furnace 2 using fasteners as will be appreciated by one of ordinary skill in the art.
  • the furnace 2 has an inner diameter defined by the vessel wall 4, wherein when the box 1 is mounted at a wall 4, the box 1 extends within the inner diameter toward the bath 5. This allows the implements that are deployed through the conduit passageways 14, 24 (see Figs. 3 , 5-7 ) to affect the bath 5 at a closer distance than that afforded by traditional boxes.
  • Figs. 2-7 illustrate the water cooled box 1 comprising an outer shell 10 and an inner shell 20.
  • the outer shell 10 comprises an inner surface 11, an outer surface 12, one or more conduit passageways 14, and one or more slag retention bars 15.
  • the outer shell 10 may comprise slag retention grooves 16 instead of bars 15 on the outer surface 12.
  • the outer shell 10 may comprise a combination of grooves 16 and bars 15.
  • the outer surface 12 further comprises a plurality of faces, including bottom face 17a, side faces 17b, 17c, curved face 17d, conduit face 17e, and top face 17f.
  • the outer shell 10 is preferably comprised primarily of copper and is formed to have a substantially U-shaped or substantially arcuate profile in cross-section, wherein the curved face 17d is directed toward the bath 5. More specifically, as best shown in Fig. 2 , the U-shaped profile of the outer shell 10 is substantially defined by the shape of the top face 17f, which is typically oriented perpendicularly to the vessel wall 4 when the box 1 is mounted thereon. As shown, the legs of the U-shaped top face 17f are substantially linear and abut the respective top edges of side faces 17b, 17c, whereas the curved portion of the top face 17f abuts a top edge of the curved face 17d.
  • the substantially U-shaped profile of the outer shell 10 is formed, and it persists away from the top face 17f to a certain depth of the outer shell 10 until the U-shaped profile is truncated at the curved face 17d by the conduit face 17e toward the bottom face 17a.
  • the inner shell 20 comprises an inner surface 21, an outer surface 22, water baffles 23, one or more conduit passageways 24, a water inlet 25, a water outlet 26, first and second mounting flanges 13a, 13b, and a top flange 28.
  • the inner shell 20 also provides strength to hold the shape and position of the outer shell 10, and the use of steel rather than copper in the inner shell 20 reduces the cost of the box 1.
  • the one or more conduit passageways 14, 24 of the outer shell 10 and the inner shell 20, respectively, are complementary in shape as well.
  • Various implements, such as a burner, a lance, or a material (i.e., carbon or lime) injection device may be protected and deployed through the body of the box 1 via the passageways 14, 24 and into the furnace 2.
  • the inner shell 20 is preferably formed of steel, and has a substantially U-shaped or substantially arcuate profile in cross-section that is complementary to the shape of the outer shell 10.
  • the inner shell 20 may be formed of stainless steel.
  • the inner shell 20 further comprises a plurality of faces, including bottom face 27a, side faces 27b, 27c, curved face 27d, and conduit face 27e. More specifically, as best shown in Fig. 4 , U-shaped profile of the inner shell 20 is substantially defined by the respective top edges of side faces 27b, 27c and curved face 27d. Thereby, the substantially U-shaped profile of the inner shell 20 is formed, and it persists to a certain depth of the inner shell 20 until the U-shaped profile is truncated at the curved face 27d by the conduit face 27e toward the bottom face 27a.
  • the slag retention bars 15 and/or grooves 16 of the outer shell 10 catch slag of the furnace 2 and cause slag buildup on the outer surface 12 of the outer shell 10.
  • the slag buildup acts as both a thermal and electrical insulator for the water cooled box 1. This is because the thermal conductivity of the slag buildup is fairly low, thereby reducing the amount of heat that is transferred from the molten metal bath 5 to the outer surface 12 of the outer shell 10.
  • the thermal conductivity of the copper preferably comprising the outer shell 10, by contrast, is very high, which allows heat that is transferred to the outer shell 10 to efficiently and quickly pass through the outer shell 10 into water that is circulating through a water chamber 30 (described further below), which carries the heat away from the box 1.
  • the water cooled box 1 is formed by fitting the inner shell 20 into the outer shell 10. More specifically, the inner surface 11 of the outer shell 10 is married to the inner surface 21 of the inner shell 20 such that the shells 10, 20 are united to define the water chamber 30 between the inner surfaces 11, 21.
  • the outer shell 10 is cooled by water that enters the box 1 via the inlet 25, is directed through the water chamber 30 by the baffles 23, and exits the box 1 via the outlet 26.
  • the inlet 25 and the outlet 26 are preferably welded to the mounting flanges 13a, 13b, and inlet 25 and outlet 26 defining respective apertures that extend through the flanges 13a, 13b into the chamber 30.
  • the shells 10, 20 are joined at lateral back edges 18 of the outer shell 10 to the mounting flanges 13a, 13b, preferably by welding, at the inner surface 11 portion of the top face 17f to the top flange 28, preferably by welding, and also at the complementary conduit passageways 14, 24.
  • the conduit passageways 14, 24 preferably have a flexible connection at a joint to one of the shells 10, 20, or the conduit passageways 14, 24 have a flexible member comprising the conduit passageways 14, 24 themselves.
  • the box 1 comprises conduit passageways 14, 24 wherein the conduit passageway 14 of the outer shell 10 is preferably formed of metal having a substantial thickness and comprising a flange flexible joint 40 that is joined to the outer shell 10, preferably by welding.
  • the conduit passageway 24 of the inner shell 20, meanwhile, is preferably comprised of a diaphragm flexible joint 50a and a can flexible joint 52a, wherein the joints 50a, 52a connect the conduit passageway 14 of the outer shell 10 to the inner shell 20.
  • the diaphragm flexible joint 50a and a can flexible joint 52a are preferably ring-shaped devices that surround the conduit passageway 14.
  • the box 1 comprises conduit passageways 14, 24 wherein the conduit passageway 14 of the outer shell 10 is preferably formed of a bellows flexible joint 42.
  • the bellows flexible joint 42 is substantially cylindrical.
  • the conduit passageway 24 of the inner shell 20, meanwhile, is preferably comprised of a diaphragm flexible joint 50b and a can (or cup) flexible joint 52b.
  • the bellows flexible joint 42 is connected at a first end to the outer shell 10 and at a second to the diaphragm flexible joint 50b.
  • the can flexible joint 52b is connected at a first end to the diaphragm flexible joint 50b and at a second end to the inner shell 20.
  • the water in the chamber 30 will flow between the flexible joint mechanisms 40, 42 of the outer shell 10 and the flexible joint mechanisms 50a,b, 52a,b of the inner shell 20.
  • the volume (length, width, and height) of the object increases. As long as the object is not restrained, the stress state of the object remains unchanged. When the temperature of an object is increased and the object is restrained in one or more planes, the volume of the object cannot increase in the direction of the restraint. This subjects the object to mechanical stress.
  • the temperature of the inner shell 20 formed of steel is almost the same as the temperature of the cooling water circulating through the water chamber 30.
  • the cooling water temperature is much cooler than the temperature of the outer shell 10 formed of copper, and therefore the temperature of the inner shell 20 is much lower than that of the outer shell 10.
  • the coefficient of thermal growth of steel is much lower than that of copper.
  • the outer shell 10 grows thermally much more than the inner shell 20. Accordingly, points of restraint between the two shells 10, 20 may create a thermal mechanical stress on the box 1.
  • the curved U-shape of the box 1 allows the outer shell 10 to move out of plane, thereby reducing the in-plane restraint experienced by the outer shell 10, as compared to the in-plane restraint experienced by traditional flat plate surfaces fixed between two side walls. This is one of the mechanical stress reduction mechanisms of the present invention.
  • the metal making processes in which furnaces such as furnace 2 are employed are, by nature, a very violent processes that cause vibration in essentially everything with a certain proximity to the process being performed.
  • the vibrational energy is amplified and the energy from this amplification can create cracking in traditional furnace components. This cracking can cause cooling water to leak into the furnace, which can result in an explosion.
  • the U-shaped surface of the outer shell 10 has a higher natural frequency than a flat plate surface of traditional water cooled boxes. Higher frequency vibration has less energy that low frequency vibration, which reduces energy available to create cracks and thereby enhances the durability and integrity of the outer shell 10.
  • the outer shell 10 and the inner shell 20 of the box 1 are joined at the mounting flanges 13a, 13b and at the conduit passageways 14, 24 between shells 10, 20.
  • the flanges 13a, 13b are the coldest parts of the box 1 and the thermal growth difference between the outer shell 10 and the inner shell 20 at the mounting flanges 13, 13b is minimal. Consequently, the thermal mechanical stress at the connection of the shells 10, 20 at the mounting flanges 13, 13b is low enough that it will not cause cracking.
  • conduit passageways 14, 24 between shells 10, 20 are located at the highest differential temperature between the shells 10, 20 and will experience the high thermal mechanical stress sufficient to cause cracking in traditional water cooled boxes.
  • the conduit passageways 14, 24 of the present invention have one or more flexible joint mechanisms 40, 42, 50a,b, 52a,b either at the joint of the passageway 14, 24 to its corresponding shell 10, 20 or a flexible member designed into the conduit passageway 14, 24 itself.
  • the flexible joint mechanisms 40, 42, 50a,b, 52a,b are preferably formed of a copper alloy, such as a copper-nickel alloy.
  • This flexible joint mechanism reduces the restraint between shells 10, 20 due to thermal growth and thereby reduces the thermal mechanical stress experienced by the box 1.
  • Some flexible joint mechanisms for this invention such as diaphragm flexible joints 50a, 50b, include the use of a plurality of thin high-strength metallic diaphragms that reduce restraint in both the radial and axial direction of the conduit passageways 14, 24.
  • Alternative flexible joint mechanisms such as can flexible joints 52a, 52b, include the use of thin metallic high strength cans that allow deformation in the can that reduces restraint of the conduit passageways 14, 24.
  • Other alternative flexible joint mechanisms, such as flexible bellows joint 42 are designed into the conduit passageway, particularly conduit passageway 14.
  • the flexible bellows joint 42 is formed like a bellows with a plurality of bellows convolutions to reduce both axial and radial restraint between the outer shell 10 and inner shell 20. As the box 1 heats up and experiences thermal growth, the bellows joint 42 will tend to straighten out, thereby absorbing mechanical stress of the box 1.
  • Yet another alternative flexible joint mechanism such as flange flexible joint 40, comprises a separate article that is preferably thinner than the surrounding metal of the outer shell 10, and welded onto the outer shell 10 at either the inner surface 11 or the outer surface 12.
  • One or more flange flexible joints 40 may be used. For example, if two flange flexible joints 40 are used, one may be connected to the inner surface 11 and another may be connected to the outer surface 12.
  • the flange flexible joint 40 reduces radial restraint between the shells 10, 20.
  • the flexible joint mechanisms 40, 42, 50a, 50b, 52a, 52b may be used independently (i.e., without other flexible joint mechanisms in the box 1) or in combination with one or more flexible joint mechanisms 40, 42, 50a, 50b, 52a, 52b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (14)

  1. Wassergekühlter Kasten (1) zur Verwendung in einem Metallherstellungsofen (2), wobei der wassergekühlte Kasten (1) Folgendes umfasst:
    eine Außenhülle (10), die einen im Wesentlichen U-förmigen Querschnitt, eine Innenoberfläche (11) und wenigstens einen Leitungsdurchgang (14) aufweist;
    eine Innenhülle (20), die einen im Wesentlichen U-förmigen Querschnitt, eine Innenoberfläche (21), mehrere Wasserleitbleche (23), wenigstens einen Leitungsdurchgang (24) und wenigstens einen Montageflansch (13a, 13b) aufweist;
    wobei die Außenhülle (10) hauptsächlich aus einem Metall besteht, das eine höhere Wärmeleitfähigkeit aufweist als die eines Metalls, das hauptsächlich die Innenhülle (20) umfasst;
    wobei die Außenhülle (10) und die Innenhülle (20) an dem wenigstens einen Montageflansch (13a, 13b) verbunden sind, wobei dadurch eine Kammer (30) definiert wird, durch die Wasser entlang eines Weges fließt, der durch die Wasserleitbleche (23), die Innenoberfläche der Außenhülle (11) und die Innenoberfläche der Innenhülle (21) definiert ist; und
    wobei der wenigstens eine Leitungsdurchgang der Innenhülle (24) oder der Außenhülle (14) eine flexible Verbindung (40, 42, 50a, 52a) umfasst.
  2. Wassergekühlter Kasten nach Anspruch 1, wobei die Außenhülle (10) hauptsächlich aus Kupfer besteht und/oder
    wobei die Innenhülle (20) hauptsächlich aus Stahl besteht.
  3. Wassergekühlter Kasten nach Anspruch 1 oder 2, wobei die Außenhülle (10) ferner einen oder mehrere Schlackenrückhaltestäbe (15) umfasst.
  4. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die Außenhülle (10) ferner eine oder mehrere Schlackenrückhalterillen (16) umfasst.
  5. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei sowohl der wenigstens eine Leitungsdurchgang der Innenhülle (21) als auch der wenigstens eine Leitungsdurchgang der Außenhülle (11) eine flexible Verbindung (40, 42, 50a, 52a) umfasst.
  6. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die Außenhülle (10) wenigstens zwei Leitungsdurchgänge (14) umfasst und die Innenhülle (20) wenigstens zwei Leitungsdurchgänge (24), einen Wassereinlass (25) und einen Wasserauslass (26) umfasst.
  7. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die Außenhülle (10) und die Innenhülle (20) ebenso an dem wenigstens einen Leitungsdurchgang der Außenhülle (14) und dem wenigstens einen Leitungsdurchgang der Innenhülle (24) verbunden sind, wobei die Leitungsdurchgänge komplementäre Strukturen sind, durch die ein Gerät eingesetzt werden kann, und vorzugsweise
    wobei das Gerät aus der Gruppe ausgewählt ist, die aus einem Brenner, einer Lanze oder einem Materialinjektor besteht.
  8. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die Außenhülle (10) eine gekrümmte Fläche (17d) umfasst, die durch den gekrümmten Abschnitt des U-förmigen Querschnitts definiert ist, wobei die gekrümmte Fläche (17d) konfiguriert ist, um sich innerhalb des Innendurchmessers und der Ofenmitte zugewandt zu erstrecken, wenn der Kasten an einer Gefäßwand (4) des Ofens montiert ist.
  9. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die wenigstens eine flexible Verbindung der Innenhülle (20) eine flexible Membranverbindung (50a) ist und/oder
    eine flexible Dosenverbindung (52a) ist.
  10. Wassergekühlter Kasten (1) nach einem der vorhergehenden Ansprüche, wobei die wenigstens eine flexible Verbindung der Außenhülle (10) eine flexible Balgverbindung (42) ist.
  11. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die Innenhülle (20) sowohl eine flexible Membranverbindung (50a) als auch eine flexible Dosenverbindung (52a) umfasst und die wenigstens eine flexible Verbindung der Außenhülle (10) eine flexible Balgverbindung (42) umfasst.
  12. Wassergekühlter Kasten nach einem der vorhergehenden Ansprüche, wobei die wenigstens eine flexible Verbindung der Außenhülle (10) eine flexible Flanschverbindung (40) umfasst, die aus einem Material ausgebildet ist, das dünner ist als das Metallmaterial, das die Außenhülle (10) umfasst.
  13. Wassergekühlter Kasten (1) zur Verwendung in einem Metallherstellungsofen (2), wobei der wassergekühlte Kasten (1) Folgendes umfasst:
    eine Außenhülle (10), die einen im Wesentlichen bogenförmigen Querschnitt, eine Innenoberfläche (11) und wenigstens einen Leitungsdurchgang (14) aufweist;
    eine Innenhülle (20), die einen im Wesentlichen bogenförmigen Querschnitt, eine Innenoberfläche (21), mehrere Wasserleitbleche (23), wenigstens einen Leitungsdurchgang (24) und wenigstens einen Montageflansch (13a, 13b) aufweist;
    wobei die Außenhülle (10) hauptsächlich aus einem Metall besteht, das eine höhere Wärmeleitfähigkeit aufweist als die eines Metalls, das hauptsächlich die Innenhülle (20) umfasst;
    wobei die Außenhülle (10) und die Innenhülle (20) an dem wenigstens einen Montageflansch (13a, 13b) verbunden sind, wobei dadurch eine Kammer (30) definiert wird, durch die Wasser entlang eines Weges fließt, der durch die Wasserleitbleche (23), die Innenoberfläche der Außenhülle (21) und die Innenoberfläche der Innenhülle (21) definiert ist;
    wobei der wenigstens eine Leitungsdurchgang der Außenhülle (14) eine flexible Flanschverbindung (40) umfasst, die aus einem Material ausgebildet ist, das dünner ist als das Metallmaterial, das die Außenhülle (10) umfasst; und
    wobei der wenigstens eine Leitungsdurchgang der Innenhülle (24) eine flexible Verbindung (42, 50a, 52a) umfasst.
  14. Wassergekühlter Kasten (1) nach Anspruch 13, wobei die wenigstens eine flexible Verbindung der Innenhülle (20) eine flexible Membranverbindung (50a) ist und/oder
    eine flexible Dosenverbindung (52a) ist.
EP19162911.2A 2018-03-15 2019-03-14 Wassergekühlter kasten für einen ofen zur metallherstellung Active EP3540350B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/922,608 US10962287B2 (en) 2017-12-08 2018-03-15 Water cooled box for a metal making furnace

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EP3540350A1 EP3540350A1 (de) 2019-09-18
EP3540350B1 true EP3540350B1 (de) 2021-09-15

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1451601A (en) * 1972-09-07 1976-10-06 British Gas Corp Fuel-fired furnaces
US7824604B2 (en) * 2006-05-17 2010-11-02 Air Liquide Advanced Technologies U.S. Llc Methods of implementing a water-cooling system into a burner panel and related apparatuses
EP3480543A3 (de) * 2017-11-03 2019-08-21 Berry Metal Company Brennergehäuse

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EP3540350A1 (de) 2019-09-18

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