EP1088112B1 - Cuve a refroidissement a eau pour le traitement sous vide d'acier liquide - Google Patents

Cuve a refroidissement a eau pour le traitement sous vide d'acier liquide Download PDF

Info

Publication number
EP1088112B1
EP1088112B1 EP99934506A EP99934506A EP1088112B1 EP 1088112 B1 EP1088112 B1 EP 1088112B1 EP 99934506 A EP99934506 A EP 99934506A EP 99934506 A EP99934506 A EP 99934506A EP 1088112 B1 EP1088112 B1 EP 1088112B1
Authority
EP
European Patent Office
Prior art keywords
vessel
water
cooling
metal jacket
accordance
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.)
Expired - Lifetime
Application number
EP99934506A
Other languages
German (de)
English (en)
Other versions
EP1088112A1 (fr
Inventor
Friedhelm Wagener
Arno Luven
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.)
SIEMENS VAI METALS TECHNOLOGIES GMBH
Original Assignee
VAI Fuchs 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 VAI Fuchs GmbH filed Critical VAI Fuchs GmbH
Publication of EP1088112A1 publication Critical patent/EP1088112A1/fr
Application granted granted Critical
Publication of EP1088112B1 publication Critical patent/EP1088112B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Definitions

  • the invention relates to a treatment vessel for the vacuum treatment of liquid steel, consisting of a lower part attached to it and a lower part having an upper part, further with a heating device, a charging device and an exhaust gas connection arranged at right angles to the central axis of the vessel, the treatment vessel having an outer metallic Jacket and in its lower part has a lining made of refractory material towards the inside of the vessel, and wherein the metallic jacket of the upper part of the vessel including the exhaust gas connection is provided with a water cooling device and on the inside is directly exposed to the process conditions prevailing inside the vessel.
  • a steel treatment vessel with the aforementioned features is described in JP-A-04 103 713;
  • Such a treatment vessel is used for aftertreatment, for example the degassing of liquid steel, in that the vessel with the immersion tubes seated on its lower part into a liquid steel filled pan immersed and the liquid steel is sucked under vacuum into the treatment vessel and returned to the pan after the treatment phase.
  • diagonally arranged connecting pieces are provided for the introduction of alloy materials and for connecting a burner heating device.
  • these treatment vessels are provided with a lining made of a refractory material, at least in their lower part.
  • the generic JP-A-04 103 713 already suggests to provide its metallic jacket with a water cooling device and to directly expose the inside of the process conditions prevailing inside the vessel.
  • the invention provides that the metallic jacket provided with the water cooling device extends beyond the exhaust gas connection and forms a gas cooling section which adjoins the exhaust gas connection of the vessel.
  • the metallic jacket set up for water cooling has a cladding made of a material having a high thermal conductivity on its surface facing the inside of the vessel, the cladding preferably is made of copper. This is associated with the advantage of avoiding bear deposits on the water-cooled jacket area, since bear attachments which form a shock-like effect dissolve from the vessel wall with only a low weight and fall into the interior of the vessel. Depending on the exemplary embodiments of the invention, only the upper part or additionally the middle part can have such a cladding.
  • the metallic jacket in its area designed for water cooling is designed with double walls and with connections for a cooling water supply and is provided for discharging the heated water.
  • the vessel jacket in its area set up for water cooling consists of a vertically extending pipe on a pipe construction, the pipes, for example, being round or square, forming the intermediate space for the passage of the cooling water.
  • the metal jacket set up for water cooling is provided on its flange connection to the inside of the vessel part, which has a lining made of refractory material, with a limited area Insulation extending transition area is provided from a refractory material.
  • the insulation arranged in the transition region on the metallic jacket set up for water cooling can have a lower thickness than the lining of the subsequent part of the vessel.
  • the metallic jacket set up for water cooling at its flange connection to the vessel part which has a lining made of refractory material by the difference in thickness between insulation and lining towards the interior of the vessel is staggered.
  • FIGS. 1 to 3 The exemplary embodiments of the treatment vessel shown in FIGS. 1 to 3 do not fall under the inventive concept and are therefore explained for better understanding of the subject matter of the invention:
  • the treatment vessel 10 shown schematically in FIG. 1 consists of a lower part 11 with immersion tubes 12 connected to it, a middle part 13 attached above it by means of a flange connection 21, which Has charging devices 14, as well as from an upper part 15, which has an exhaust port 16 arranged at right angles to the central axis of the treatment vessel 10, to which a gas cooler 17 is connected in the illustrated embodiment.
  • a compensator 18 is interposed between the exhaust connection 16 and the gas cooler 17.
  • the entire vessel has an outer metallic jacket 19, the lower part 11 and the middle part 13 of the treatment vessel 10 having a lining 20 made of a refractory material, which is attached to the interior of the vessel.
  • the upper part 15 is only designed with the metallic jacket 19, which is provided with a water cooling device in a manner shown in FIG.
  • the vessel jacket of the upper part 15 is double-walled with the outer metallic jacket 19 and an inner metallic jacket 22, which form an intermediate space 23 between them for the passage of cooling water.
  • the area of the metallic jacket 19 adjoining the flange connection 21 is provided with an inner insulation 26 in a transition area. Since this insulation 26 has a lower thickness than the entire lining 20 of the adjoining middle part 13 of the treatment vessel 10, the upper part 15 is arranged offset from the interior of the vessel by an amount which corresponds to the difference in thickness between the insulation 26 and the refractory lining 20.
  • FIG. 1 it can be seen from FIG.
  • the lining 20 consists of a permanent lining 24 applied to the metallic jacket 19 of the central part 13, to which the wear lining 25 is connected on the inside.
  • the insulation 26 of the upper part 15, on the other hand, has the same structure as the permanent lining 24 of the lower part 11.
  • the upper part 15 has a metallic jacket 19 with water cooling, but the same is also carried out on the central part 13 up to its flange connection 21 for connection to the lower part 11, which also has a lining 20 Refractory material is provided.
  • a plating 30 made of copper is indicated in the region of the middle part 13, which is attached to the surface of the middle part 13 and the upper part 15 facing the inside of the vessel and adheres due to the shock-like heat dissipation from the vessel transition to the water cooling of the metallic jacket 19 avoiding bear approaches.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Articles (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Claims (8)

  1. Récipient de traitement ( 10) pour le traitement sous vide d'acier liquide, comprenant une partie inférieure ( 11) présentant des tuyaux d'immersion (12) montés dessus et une partie supérieure (15), également équipé d' un dispositif de chauffage, d' un système d'alimentation (14) et d'un branchement des gaz brûlés (16) disposé en angle droit par rapport à l'axe central du récipient, le récipient de traitement (10) présentant une enveloppe (19) métallique extérieure et, dans sa partie inférieure (11), un revêtement (20) placé en direction de l'intérieur du récipient et à base de matériau réfractaire, l'enveloppe ( 19) métallique de la partie supérieure ( 15) du récipient, y compris le branchement des gaz brûlés (16), étant pourvue d'un système de refroidissement par eau ( 23) et étant exposée côté intérieur directement aux conditions de procédé régnant à l'intérieur du récipient (10), caractérisé en ce que l'enveloppe (19) métallique pourvue du dispositif de refroidissement par eau ( 23) s'étend au-delà du branchement de gaz brûlés (16), et forme un tronçon de réfrigération de gaz (27) se raccordant au branchement des gaz brûlés du récipient.
  2. Récipient de traitement selon la revendication 1, caractérisé en ce que l'enveloppe (19) métallique aménagée pour un refroidissement par eau présente, sur sa surface dirigée vers l'intérieur du récipient, un placage (30) à base d'un matériau présentant une bonne conductibilité thermique.
  3. Récipient de traitement selon la revendication 2, caractérisé en ce que le placage (30) est à base de cuivre.
  4. Récipient de traitement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'enveloppe ( 19) métallique est conçue avec une double paroi dans sa zone aménagée pour un refroidissement par eau, et est pourvue de branchements pour une alimentation en eau de réfrigération et pour une dérivation de l'eau réchauffée.
  5. Récipient de traitement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'enveloppe ( 19) métallique est conçue, dans sa zone aménagée pour un refroidissement par eau, à base de tuyaux individuels et juxtaposés pour le passage de l'eau de refroidissement.
  6. Récipient de traitement selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'enveloppe ( 19) métallique aménagée pour un refroidissement par eau est pourvue, sur son branchement de bride (21) avec la partie de récipient (11, 13) présentant un revêtement ( 20) à base de matériau réfractaire, côté intérieur, d'une isolation (26) s'étendant sur une zone de transition limitée et à base d'un matériau réfractaire.
  7. Récipient de traitement selon la revendication 6, caractérisé en ce que l'isolation (26), disposée dans la zone de transition sur l'enveloppe (19) métallique aménagée pour un refroidissement par eau, présente une surface inférieure au revêtement ( 20) de la partie de récipient (11, 13) s'y raccordant.
  8. Récipient de traitement selon la revendication 7, caractérisé en ce que l'enveloppe (19) métallique conçue pour être refroidie par l'eau est montée au niveau de son raccord à bride ( 21) avec la partie du récipient ( 11, 13) qui présente un revêtement à base de matériau réfractaire, de façon décalée par rapport à l'intérieur du récipient, la valeur de ce décalage correspondant à la différence d'épaisseur qui existe entre l'isolation ( 26) et le revêtement (20).
EP99934506A 1998-05-16 1999-05-17 Cuve a refroidissement a eau pour le traitement sous vide d'acier liquide Expired - Lifetime EP1088112B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19822159 1998-05-16
DE19822159A DE19822159A1 (de) 1998-05-16 1998-05-16 Mit einer Wasserkühlung versehenes Gefäß für die Behandlung von flüssigem Stahl
PCT/DE1999/001472 WO1999060174A1 (fr) 1998-05-16 1999-05-17 Cuve a refroidissement a eau pour le traitement sous vide d'acier liquide

Publications (2)

Publication Number Publication Date
EP1088112A1 EP1088112A1 (fr) 2001-04-04
EP1088112B1 true EP1088112B1 (fr) 2003-01-29

Family

ID=7868094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99934506A Expired - Lifetime EP1088112B1 (fr) 1998-05-16 1999-05-17 Cuve a refroidissement a eau pour le traitement sous vide d'acier liquide

Country Status (10)

Country Link
US (1) US6638471B1 (fr)
EP (1) EP1088112B1 (fr)
KR (1) KR100439642B1 (fr)
CN (1) CN1243837C (fr)
AT (1) ATE231924T1 (fr)
BR (1) BR9910506A (fr)
DE (2) DE19822159A1 (fr)
ES (1) ES2192061T3 (fr)
RU (1) RU2201459C2 (fr)
WO (1) WO1999060174A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0424967D0 (en) * 2004-11-12 2004-12-15 Hamworthy Combustion Eng Ltd Incinerator for boil-off gas
US9644246B2 (en) 2011-05-11 2017-05-09 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling
US9038867B2 (en) 2011-05-11 2015-05-26 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1184537A (en) * 1967-04-28 1970-03-18 Hoesch Ag Improvements in Vacuum Vessels for Degassing Molten Metals.
JPH04103713A (ja) * 1990-08-20 1992-04-06 Nippon Steel Corp 溶鋼の高速脱ガス方法
DE4130590C2 (de) 1991-09-12 1993-11-04 Mannesmann Ag Entgasungsgefaess fuer die vakuumbehandlung von fluessigem stahl
US5520718A (en) * 1994-09-02 1996-05-28 Inland Steel Company Steelmaking degassing method

Also Published As

Publication number Publication date
BR9910506A (pt) 2001-01-30
ES2192061T3 (es) 2003-09-16
DE19822159A1 (de) 1999-11-18
ATE231924T1 (de) 2003-02-15
US6638471B1 (en) 2003-10-28
WO1999060174A1 (fr) 1999-11-25
EP1088112A1 (fr) 2001-04-04
CN1243837C (zh) 2006-03-01
CN1308687A (zh) 2001-08-15
RU2201459C2 (ru) 2003-03-27
KR100439642B1 (ko) 2004-07-12
KR20010071274A (ko) 2001-07-28
DE59904170D1 (de) 2003-03-06

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