WO1997021965A1 - Revetement de four - Google Patents

Revetement de four Download PDF

Info

Publication number
WO1997021965A1
WO1997021965A1 PCT/SE1996/000093 SE9600093W WO9721965A1 WO 1997021965 A1 WO1997021965 A1 WO 1997021965A1 SE 9600093 W SE9600093 W SE 9600093W WO 9721965 A1 WO9721965 A1 WO 9721965A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
cooling
cooling means
bar
fireproof material
Prior art date
Application number
PCT/SE1996/000093
Other languages
English (en)
Inventor
Staffan GRANSTRÖM
Original Assignee
Essge Systemteknik Ab
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 Essge Systemteknik Ab filed Critical Essge Systemteknik Ab
Priority to AU49597/96A priority Critical patent/AU4959796A/en
Publication of WO1997021965A1 publication Critical patent/WO1997021965A1/fr

Links

Classifications

    • 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
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0051—Cooling of furnaces comprising use of studs to transfer heat or retain the liner

Definitions

  • This invention relates to a panel for furnaces, which are intended to be used when smelting steel by means of so called hightemperature processes, the panel being intended to be an integral part of wall- and/or ceiling constructions of the furnace, and the panel in application position having an outside and an inside.
  • Hightemperature processes have been developed concurrently with the development with ceramic walls and ceilings. A limited durability and the costs in connection herewith have enforced a development towards cooled, autogene wall- and ceiling panels.
  • the first step was watercooled box panels with better and not so well controlled water flow and a limited pressure and a limited temperature, which led to frequent crack formations in the panels with a great maintenance as a result.
  • duplex panel is meant a panel comprising several different materials in the purpose of reducing the heat losses through the panel and increasing the durability of the panel.
  • Fig. 1 shows a plan view of a furnace which is provided with the panel according to the invention
  • Fig. 2 shows a section along the line II-II of Fig. 1
  • Fig. 3 shows a separate panel according to the invention, seen as it would appear from the inner part of the furnace
  • Fig 4 shows a view of the panel according to Fig. 3, seen in the direction of the arrows IV-IV.
  • a furnace 1 which has an essentially conventional design, but which distinguishes from the conventional furnaces by being provided with the panel 2 according to the invention.
  • the furnace intended for smelting steel has in similarity with conventional furnaces a lower portion 3 of fireproof material. Furthermore, the furnace has an upper portion 4, in which the panels according the invention are arranged.
  • the furnace has essentially circular form.
  • the wall of the upper portion 4 comprises the panels 2a, b, c, d, according to the invention, which are put together to a unit.
  • Fig. 1 are shown only four panels 2a-d, but of course the number of panels is more than four, because the panels are intended to extend around the entire circumference.
  • Figs. 3, 4 is the panel according to the invention shown loosened from the furnace.
  • Each panel 2a-d has the design of a wall portion of a circular cylinder and accordingly has a vertical extension, which also appears from Fig. 2.
  • the outside 5 of the panel has a plurality of vertical pipe means 6a-h comprising pipes, which are coupled in series for forming an effective cooling means 7 and through which a cooling medium, for instance water, is intended to stream.
  • a cooling medium for instance water
  • This means 7 has an extension, seen in the radial direction of the furnace, which corresponds to the distance A.
  • the inside of the panel according to the invention is covered by a thick, homogenous layer of a suitable fireproof material 10, the thickness of which (see the distance B in Fig.
  • the new panel gets an extremely good resistance against high temperatures.
  • this mentioned problem has been solved by the fact that a great number of horizontal, bar-like means 11 are arranged at different levels in each vertical pipe 6a-h, and these horizontal means 11 extend through the layer of fireproof material 10 and has essentially the same length as the radial extension of the material 10.
  • the bar-like means 11 with their inner end portions are intended to be in close contact with the vertical pipe means 6a-h. Due to that fact the means 11 , which are arranged in the thick, fireproof material 10, and which preferably are made of copper, will suck up heat from the material 10 and take the heat further to the pipe means 6a-h for conducting away the heat. This means that the fireproof material is spared from being destroyed by burning, which accordingly makes possible to use the effective hightemperature processes when smelting the steel.
  • the bar-like means 11 can either be solid or tubular with different types of cross sections. Furthermore, the means could be plate-formed. The important thing is that the means 11 effectively suck up and conduct the heat away from the fireproof material. In order that this shall be completely successful, there is required a good cooperation between the means 11 and the effective cooling means 7.
  • the bar-like or the plate-like means 11 are fastened to the pipes 6a-h of the cooling means. Besides the fact that there will be a good heat conduction from the means 11 to the cooling means 7, the fastening of the means 11 to the pipes 6a-h has the consequence that the means 11 contribute to hold the fireproof material to the pipes.
  • the invention is of course not limited to the shown and mentioned embodiment but can be modified within the scope of the following claims.
  • the new invention idea could of course be applied partly in wall panels for other types of furnaces, partly in ceiling panels for different types of furnaces.
  • the outside of the panel can have another design than the one shown with pipes.
  • the pipe could be exchanged for a cooling means which has a plate-like design and comprises an inner wall and an outer wall, between which the cooling medium can stream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

Cette invention a trait à un panneau pour fours destinés, de par leur conception, à être utilisés pour la fonte de l'acier par des procédés dits à température élevée, le panneau étant conçu pour constituer une partie intégrante des parois et/ou de la voûte du four et ayant, en position de mise en service, une partie externe et une partie interne. Le panneau selon l'invention se caractérise par la combinaison des éléments suivants, à savoir que l'extérieur du panneau (2) est pourvu d'organes de refroidissement de forme allongée (7), agencés de manière à ce qu'un milieu de refroidissement puisse y circuler et que des conduits (8, 9) y soient disposés pour introduire ledit milieu dans les organes de refroidissement (7) et l'en faire sortir, ces organes de refroidissement comportant un prolongement dans le sens transversal correspondant à l'écartement A; que l'intérieur du panneau (2) est recouvert d'une mince couche de matériau réfractaire (10) dont l'épaisseur B est égale ou supérieure à l'écartement A; et que le panneau (2) est pourvu d'un grand nombre d'organes du type barre ou plaque (11), disposés à différents niveaux au-dessus de l'ensemble des organes de refroidissement (9), ces organes du type barre ou plaque (11) pénétrant dans une large mesure dans la couche de matériau réfractaire (10).
PCT/SE1996/000093 1995-12-12 1996-01-30 Revetement de four WO1997021965A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49597/96A AU4959796A (en) 1995-12-12 1996-01-30 Lining of furnace

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9504444-2 1995-12-12
SE9504444A SE9504444D0 (sv) 1995-12-12 1995-12-12 Panel

Publications (1)

Publication Number Publication Date
WO1997021965A1 true WO1997021965A1 (fr) 1997-06-19

Family

ID=20400566

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000093 WO1997021965A1 (fr) 1995-12-12 1996-01-30 Revetement de four

Country Status (3)

Country Link
AU (1) AU4959796A (fr)
SE (1) SE9504444D0 (fr)
WO (1) WO1997021965A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900854A1 (fr) * 1997-09-04 1999-03-10 Titanium Hearth Technologies, Inc. Collecteur du condensé pour four d'affinage à creuset froid
LU90381B1 (de) * 1999-04-01 2000-10-02 Wurth Paul Sa Gekuehlte Schachtofenwand

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849587A (en) * 1973-10-15 1974-11-19 Hatch Ass Ltd Cooling devices for protecting refractory linings of furnaces
US4097679A (en) * 1976-01-09 1978-06-27 Sankyo Special Steel Co., Ltd. Side wall of the ultra high power electric arc furnaces for steelmaking
CH627834A5 (fr) * 1977-12-19 1982-01-29 Sidepal Sa Paroi refroidie d'un four a arc.
DE2745622C2 (de) * 1977-10-11 1983-02-10 Mannesmann AG, 4000 Düsseldorf Gefäß für einen Metallschmelzofen, insbesondere Lichtbogenofen
EP0415038A1 (fr) * 1989-08-28 1991-03-06 Krupp Koppers GmbH Paroi formé d'un assemblage de tubes pour une enceinte de réaction à chaud
WO1995022732A1 (fr) * 1994-02-16 1995-08-24 The University Of Melbourne Refroidisseur refractaire interne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849587A (en) * 1973-10-15 1974-11-19 Hatch Ass Ltd Cooling devices for protecting refractory linings of furnaces
US4097679A (en) * 1976-01-09 1978-06-27 Sankyo Special Steel Co., Ltd. Side wall of the ultra high power electric arc furnaces for steelmaking
DE2745622C2 (de) * 1977-10-11 1983-02-10 Mannesmann AG, 4000 Düsseldorf Gefäß für einen Metallschmelzofen, insbesondere Lichtbogenofen
CH627834A5 (fr) * 1977-12-19 1982-01-29 Sidepal Sa Paroi refroidie d'un four a arc.
EP0415038A1 (fr) * 1989-08-28 1991-03-06 Krupp Koppers GmbH Paroi formé d'un assemblage de tubes pour une enceinte de réaction à chaud
WO1995022732A1 (fr) * 1994-02-16 1995-08-24 The University Of Melbourne Refroidisseur refractaire interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900854A1 (fr) * 1997-09-04 1999-03-10 Titanium Hearth Technologies, Inc. Collecteur du condensé pour four d'affinage à creuset froid
LU90381B1 (de) * 1999-04-01 2000-10-02 Wurth Paul Sa Gekuehlte Schachtofenwand

Also Published As

Publication number Publication date
AU4959796A (en) 1997-07-03
SE9504444D0 (sv) 1995-12-12

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