EP1088112A1 - 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

Info

Publication number
EP1088112A1
EP1088112A1 EP99934506A EP99934506A EP1088112A1 EP 1088112 A1 EP1088112 A1 EP 1088112A1 EP 99934506 A EP99934506 A EP 99934506A EP 99934506 A EP99934506 A EP 99934506A EP 1088112 A1 EP1088112 A1 EP 1088112A1
Authority
EP
European Patent Office
Prior art keywords
vessel
treatment vessel
water cooling
metallic jacket
treatment
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.)
Granted
Application number
EP99934506A
Other languages
German (de)
English (en)
Other versions
EP1088112B1 (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
Technometal Gesellschaft fuer Metalltechnologie mbH
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 Technometal Gesellschaft fuer Metalltechnologie mbH, VAI Fuchs GmbH filed Critical Technometal Gesellschaft fuer Metalltechnologie mbH
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

Links

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, a middle part and an upper part and immersion tubes attached to the lower part, the treatment vessel having a heating device, a charging device and an exhaust gas connection arranged at right angles to the central axis of the vessel is provided, and wherein the treatment vessel has an outer metallic jacket and at least partially a lining made of refractory material attached to the interior of the vessel.
  • a steel treatment vessel with the aforementioned features is described in DE 41 30 590 C2;
  • Such a treatment vessel is used for the aftertreatment, for example the degassing of liquid steel, in that the vessel with the immersion tubes sitting on its lower part into a liquid steel filled pan immersed and the liquid steel is sucked into the treatment vessel under vacuum and returned to the pan after the treatment phase.
  • Such treatment vessels are provided with a complete lining made of a refractory material, which extends beyond the exhaust gas connection to a gas cooler that is usually connected.
  • diagonally arranged connecting pieces are provided for the introduction of alloy materials and for connecting a burner heating device.
  • the first disadvantage associated with such treatment vessels is that the lining must be regularly replaced due to the wear occurring on the refractory lining; this process is not only material and labor intensive, there are also problems with the disposal of the used refractory material. Furthermore, after such a relining of the vessel, but also after longer pauses in treatment, the supply of considerable heating energy via separate heating devices is required in order to bring the treatment vessel to the necessary temperature before the subsequent treatment phase or to maintain this temperature. In particular in the middle part and in the upper part of the treatment vessel, steel caking, so-called bears, occurs as a result of steel splashes occurring during the treatment or due to particles entrained in the degassing stream, as described in detail in DE 41 30 590 C2. Finally, the very hot outer walls of the treatment vessel lead to a high thermal load on the environment, and for the same reason cooling of the exhaust gases is only possible in a gas cooler to be provided separately.
  • the invention is therefore based on the object of avoiding the abovementioned disadvantages in a treatment vessel of the type mentioned at the outset and creating a treatment vessel which can be operated with less maintenance.
  • the basic idea of the invention provides that the metallic jacket of the upper part of the vessel including the exhaust gas connection is provided with a water cooling device and is directly exposed on the inside to the process conditions prevailing in the interior of the vessel.
  • the invention uses for the first time the use of water cooling known from other areas in a generic treatment vessel, with a lining with refractory material being dispensed with in the vessel part equipped with the water cooling of the metallic jacket.
  • the basic concept of the invention provides for the installation of the water cooler in the upper part of the vessel, including the exhaust gas connection, according to a further exemplary embodiment of the invention it is also provided that the wall of the central part of the treatment vessel is also provided with water cooling, thereby reducing the effort involved in operating such a system Vessel is further reduced.
  • Another advantage here is the reduction in the height of the vessel and thus the reduction in the overall system height, since the process-relevant connecting pieces can be laid in the upper part of the vessel.
  • the metallic jacket set up for water cooling has a plating of a high thermal conductivity on its surface facing the interior of the vessel comprising material, wherein the plating is preferably made of copper.
  • the plating is preferably made of copper.
  • the metallic jacket is double-walled in its area designed for water cooling and is provided with connections for a cooling water supply and for a discharge of the heated water.
  • the vessel jacket in its area set up for water cooling consists of a vertically extending tube with a tubular construction, the tubes, for example having a round or square shape, 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 an insulation made of a refractory material and extending over a limited transition area.
  • 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 having a lining made of refractory material by the difference in thickness between insulation and lining to the inside of the vessel is staggered.
  • connection of a gas cooler of conventional design to the exhaust gas connection of the treatment vessel is provided in the usual way.
  • Figure 1 shows a steel treatment vessel in a schematic representation with a water-cooled upper part.
  • FIG. 2 shows the transition between the water-cooled upper part and the middle part of the treatment vessel according to FIG. 1, provided with a refractory lining, in a sectional individual illustration;
  • FIG 3 shows an embodiment of a steel treatment vessel with an upper part and middle part provided with a water-cooled wall
  • Fig. 4 shows the subject of Figure 3 with a gas cooling section connected to the exhaust gas connection.
  • 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, which is fitted above by means of a flange connection 21 and which has charging devices 14, and an upper part 15, which is at right angles to the central axis of the treatment vessel 10 arranged exhaust gas connection 16, 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 shell 19, which The lower part 11 and the middle part 13 of the treatment vessel 10 have 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. 2.
  • 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 central 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. It can be seen in detail 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 area 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 Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Articles (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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
DE19822159A DE19822159A1 (de) 1998-05-16 1998-05-16 Mit einer Wasserkühlung versehenes Gefäß für die Behandlung von flüssigem Stahl
DE19822159 1998-05-16
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 true EP1088112A1 (fr) 2001-04-04
EP1088112B1 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
BR112013028970B1 (pt) 2011-05-11 2019-03-19 Tyk America, Inc. Esnórquel desgaseificador com resfriamento de percurso de fluxo em serpentina

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9960174A1 *

Also Published As

Publication number Publication date
BR9910506A (pt) 2001-01-30
DE59904170D1 (de) 2003-03-06
KR100439642B1 (ko) 2004-07-12
US6638471B1 (en) 2003-10-28
KR20010071274A (ko) 2001-07-28
ATE231924T1 (de) 2003-02-15
ES2192061T3 (es) 2003-09-16
CN1243837C (zh) 2006-03-01
CN1308687A (zh) 2001-08-15
EP1088112B1 (fr) 2003-01-29
WO1999060174A1 (fr) 1999-11-25
DE19822159A1 (de) 1999-11-18
RU2201459C2 (ru) 2003-03-27

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