EP0413925A1 - Luftkühlsystem für in einem Tragring gelagerte metallurgische Gefässe - Google Patents

Luftkühlsystem für in einem Tragring gelagerte metallurgische Gefässe Download PDF

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Publication number
EP0413925A1
EP0413925A1 EP90111929A EP90111929A EP0413925A1 EP 0413925 A1 EP0413925 A1 EP 0413925A1 EP 90111929 A EP90111929 A EP 90111929A EP 90111929 A EP90111929 A EP 90111929A EP 0413925 A1 EP0413925 A1 EP 0413925A1
Authority
EP
European Patent Office
Prior art keywords
air
support ring
cooling system
vessel
air cooling
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.)
Withdrawn
Application number
EP90111929A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rudolf Dipl.-Ing. Fischer
Horst Dipl.-Ing. Willaschek
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.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte 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 MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Publication of EP0413925A1 publication Critical patent/EP0413925A1/de
Withdrawn legal-status Critical Current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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4633—Supporting means
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4646—Cooling arrangements

Definitions

  • the invention relates to a direct air cooling system for warm-running metallurgical vessels equipped with a loose support ring.
  • Such metallurgical vessels can expand freely with increasing temperature. Often, however, they are exposed to tensile stresses and temperatures so high that the yield point can be exceeded and permanent deformations of the vessel can occur. Gradually and over the years the vessel grows in diameter u. U. so strong that the vessel jacket touches the support ring, grows into the support ring or deforms the support ring. In addition, cracks can occur in the vessel jacket. The reason for the damage described is that the pressure of the refractory masonry rises with increasing temperatures. Since the masonry becomes considerably hotter than the vessel jacket, the masonry strives to expand more than the vessel, even if the thermal expansion coefficient of the masonry is approximately the same as the thermal expansion coefficient of the steel jacket.
  • air cooling is preferably used in the support ring area.
  • An air cooling system is known with a so-called pipe curtain, which is pushed between the support ring and the vessel and in which air is blown radially onto the vessel jacket through a large number of individual nozzles distributed over a large area.
  • This air cooling system has drawbacks that high air pressure is required if effective cooling is to be achieved.
  • the Space between the support ring and the vessel is restricted by the nozzle system.
  • existing natural convection is severely hampered or even suppressed by installing the cooling system.
  • the object of the invention is to make the direct air cooling of warm-running metallurgical vessels with a loose support ring more effective, so that a vessel deformation can be effectively prevented.
  • the invention provides the features of the characterizing part of the main claim.
  • the features of the subclaims serve to further develop the features of the main claim.
  • the invention is based on the fact that all flow cross sections of the system in which the cooling medium is to flow air are dimensioned large so that the flow resistance remains small and thus only a slight excess air pressure is necessary in order to maintain the air flow required for heat dissipation.
  • the natural convection air flow is not hindered when the cooling system according to the invention is installed, but is reinforced.
  • the space between the vessel jacket and support ring remains free of obstructing internals. All air ducts and pipes are easily accessible for repairs or cleaning purposes.
  • the outflow openings of the blowpipes generally do not have any nozzles that could give rise to blockage or damage.
  • the attachment of the cooling system according to the invention can be easily retrofitted to vessels that previously had no cooling device.
  • the economy and effectiveness of the cooling system according to the invention compared to cooling systems of the prior art can be seen, for example, from a comparison of the pressure drop numbers and required blower output data in a steelworks converter with a batch weight of approximately 220 t. While an air cooling system of the prior art to achieve a converter jacket temperature of approximately 350 ° C has a pressure loss of approximately 3000 mm AC and requires a blower output of approximately 880 kW, in the cooling system according to the invention the overall pressure loss is approximately 750 mm AC to achieve the same converter jacket temperature and the power requirement for the blower is approximately 220 kW.
  • FIG 1 and 2 show the converter wall (1) with the refractory lining (2) on the inside.
  • the support ring (5) is shown between the and the side of the converter outer wall (1) There is a gap (3) in the converter wall.
  • a circumferential, box-shaped air duct (6) made of sheet steel construction is attached to the outside of the support ring (5).
  • a larger number of blowpipes (7) branch off at a distance around the circumference and, according to FIG. 1, run parallel to the underside of the support ring (5) in the direction of the converter gap (3).
  • blow pipes (7) are directed with their outflow openings (8) at an angle of approximately 45 ° to the vessel wall (1).
  • the attachment of a nozzle to the outflow opening is generally not provided.
  • Blower air (generated by a blower, not shown) is pressed through the support pin (4), the air channels (6) and the blowpipes (7).
  • the air flowing out of the blowpipes (7) is blown into the gap (3) between the support ring (5) and the vessel wall (1) and directed obliquely upwards, so that natural convection is supported.
  • Fig. 2 shows an arrangement of the air cooling system, in which the blow pipes (7) are passed through the support ring (5).
  • the blowpipes (7) end with their outflow end in the inner wall of the support ring (5).
  • the inner wall of the support ring is drilled out towards the outflow opening (8) of the blow pipe (7) in such a way that a blowing direction arises obliquely upwards in the direction of the vessel wall (1).
  • blowpipes (7) according to FIG. 1 are also suitable for retrofitting a metallurgical vessel with the air cooling system according to the invention.
  • blower air (arrow) is fed into the cooling system through a single support pin (4).
  • the blower air is distributed from this trunnion (4) over the air channels (6) arranged on the circumference of the supporting ring (5).
  • Fig. 4 shows the blower air introduction (arrows) over both support pins of the converter, both through the floating bearing support pin (4a) and through the drive support pin (4b).
  • the air cooling system is divided, i.e. Half of the circumference of the vessel is supplied with cooling air from a trunnion.
  • the air channels (6) are thus interrupted in the middle of the circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP90111929A 1989-08-24 1990-06-23 Luftkühlsystem für in einem Tragring gelagerte metallurgische Gefässe Withdrawn EP0413925A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3927928 1989-08-24
DE3927928A DE3927928A1 (de) 1989-08-24 1989-08-24 Luftkuehlsystem fuer in einem tragring gelagerte metallurgische gefaesse

Publications (1)

Publication Number Publication Date
EP0413925A1 true EP0413925A1 (de) 1991-02-27

Family

ID=6387759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90111929A Withdrawn EP0413925A1 (de) 1989-08-24 1990-06-23 Luftkühlsystem für in einem Tragring gelagerte metallurgische Gefässe

Country Status (5)

Country Link
US (1) US5039067A (enrdf_load_stackoverflow)
EP (1) EP0413925A1 (enrdf_load_stackoverflow)
JP (1) JPH0390508A (enrdf_load_stackoverflow)
DE (1) DE3927928A1 (enrdf_load_stackoverflow)
PL (1) PL286597A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694803A1 (fr) * 1992-08-17 1994-02-18 Lorraine Laminage Dispositif de refroidissement d'une paroi extérieure d'un récipient métallurgique.
EP0688876A3 (de) * 1994-06-20 1997-01-29 Mannesmann Ag Gekühlter Konvertertragring
US5853656A (en) * 1997-07-08 1998-12-29 Bethlehem Steel Corporation Apparatus and method for cooling a basic oxygen furnace trunnion ring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302468B6 (cs) * 2010-03-18 2011-06-01 Trinecké železárny, a.s. Tepelná ochrana vnejšího plášte konvertoru

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201108A (en) * 1962-07-21 1965-08-17 Pintsch Bamag Ag Steel converter with loose supporting ring
GB1146825A (en) * 1965-04-21 1969-03-26 Voest Ag Vessel for carrying out metallurgical processes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1433509A1 (de) * 1963-09-24 1968-12-19 Didier Werke Ag Herdraumwaende,insbesondere Rueckwaende von Industrieoefen,z.B. Siemens-Martin-OEfen
AT258329B (de) * 1965-09-14 1967-11-27 Voest Ag Tiegel oder Konverter mit gesondertem Tragring
US3713638A (en) * 1970-12-02 1973-01-30 Chicago Bridge & Iron Co Converter vessel with oval trunnion ring
DE2151629A1 (de) * 1971-10-16 1973-04-26 Demag Ag Kuehlvorrichtung fuer ein warmgaengiges gefaess, insbesondere fuer einen stahlwerkskonverter
DE3147338C2 (de) * 1981-11-28 1985-02-07 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg Wassergekühlter Deckel für metallurgische Gefäße
DE3147337C2 (de) * 1981-11-28 1985-03-14 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxemburg/Luxembourg Wassergekühlte Haube für metallurgische Gefäße, insbesondere Gießpfannen
DE3333841C1 (de) * 1983-09-20 1984-08-30 Mannesmann AG, 4000 Düsseldorf Metallurgisches Gefaess,insbesondere stationaerer oder auswechselbarer Stahlwerkskonverter
FR2572388B1 (fr) * 1984-10-29 1986-12-26 Saint Gobain Vitrage Cadre de soutien d'une feuille de verre pendant la trempe
JPS61174311A (ja) * 1985-01-29 1986-08-06 Nippon Steel Corp 転炉炉体の冷却方法
US4815096A (en) * 1988-03-08 1989-03-21 Union Carbide Corporation Cooling system and method for molten material handling vessels

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201108A (en) * 1962-07-21 1965-08-17 Pintsch Bamag Ag Steel converter with loose supporting ring
GB1146825A (en) * 1965-04-21 1969-03-26 Voest Ag Vessel for carrying out metallurgical processes

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 13, Nr. 293 (C-615)[3641], 6. Juli 1989; & JP-A-1 087 712 (KOBE STEEL LTD) 31-03-1989 *
PATENT ABSTRACTS OF JAPAN, Band 13, Nr. 328 (C-621)[3676], 24. Juli 1989; & JP-A-1 104 712 (SUMITOMO METAL IND. LTD) 21-04-1989 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694803A1 (fr) * 1992-08-17 1994-02-18 Lorraine Laminage Dispositif de refroidissement d'une paroi extérieure d'un récipient métallurgique.
EP0688876A3 (de) * 1994-06-20 1997-01-29 Mannesmann Ag Gekühlter Konvertertragring
US5853656A (en) * 1997-07-08 1998-12-29 Bethlehem Steel Corporation Apparatus and method for cooling a basic oxygen furnace trunnion ring
WO1999002741A1 (en) * 1997-07-08 1999-01-21 Bethlehem Steel Corporation Apparatus and method for cooling a basic oxygen furnace trunnion ring

Also Published As

Publication number Publication date
JPH0390508A (ja) 1991-04-16
DE3927928C2 (enrdf_load_stackoverflow) 1991-11-21
DE3927928A1 (de) 1991-02-28
PL286597A1 (en) 1991-05-06
US5039067A (en) 1991-08-13

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