EP0742889A1 - Procede et dispositif de reconstruction partielle de la paroi de revetement de poches a acier en fusion - Google Patents

Procede et dispositif de reconstruction partielle de la paroi de revetement de poches a acier en fusion

Info

Publication number
EP0742889A1
EP0742889A1 EP95908261A EP95908261A EP0742889A1 EP 0742889 A1 EP0742889 A1 EP 0742889A1 EP 95908261 A EP95908261 A EP 95908261A EP 95908261 A EP95908261 A EP 95908261A EP 0742889 A1 EP0742889 A1 EP 0742889A1
Authority
EP
European Patent Office
Prior art keywords
template
sealing body
lining
steel
area
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
EP95908261A
Other languages
German (de)
English (en)
Other versions
EP0742889B1 (fr
Inventor
Heinz Werner Dipl Ing Stripp
Wolfgang A Rasim
Horst Tiemann
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.)
Wuelfrather Feuerfest und Dolomitwerke & Co GmbH
Original Assignee
Dolomitwerke 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6509357&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0742889(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dolomitwerke GmbH filed Critical Dolomitwerke GmbH
Publication of EP0742889A1 publication Critical patent/EP0742889A1/fr
Application granted granted Critical
Publication of EP0742889B1 publication Critical patent/EP0742889B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
    • 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
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D2001/1605—Repairing linings
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0036—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising inflatable or extendable parts

Definitions

  • the invention relates to a method for restoring the refractory lining in the upper zone of the wall region of a pan for casting and treating steel or similar metallurgical vessels and a device for carrying out the method.
  • the refractory lining of metallurgical vessels usually consists of permanent feed and working feed.
  • permanent lining fireclay bricks or insulating bricks are usually applied in one or more layers to the inside of the steel jacket of the vessel.
  • the working chuck is applied to it, which is later in contact with the molten steel and is removed by erosion, in particular when the metal bath is moved, and by chemical attack, in particular by the slag floating on the molten steel.
  • the working lining can be bricked with refractory bricks or brought in as a refractory mass that solidifies into a monolithic layer. Combinations of these two types of delivery are also possible.
  • the infeed is often divided into zones which have different strengths of the working feed and / or differently resistant refractory types.
  • the working feed is either completely broken out and renewed at the end of the pan journey or repaired in the affected zones if the wear is only partially premature. If the working feed is exposed to chemically aggressive slag in the upper part of the pan about 1 m from the upper edge, the feed in the slag zone has to be broken out and renewed or repaired several times during a pan trip.
  • a delivery method is known in which the working feed of steel ladles is delivered with refractory concrete.
  • a template is required for the wall lining, which specifies the inner contour of the finished concrete lining. The mass is poured into the annular space between the permanent lining and the template.
  • Template that extends from the bottom to the top of the pan. For technical reasons, it can be divided in the middle. Mixers, pumps and internal vibrators are usually used to carry out the casting process. The shedding over a period of, for example, three hours must be carried out continuously to avoid possible hardening in the surface area. The vibrators are intended to prevent cavities and cavities from forming in order to achieve good compaction. If, for example, the mass has set after 24 hours, the template can be pulled out again.
  • the object is achieved in that the gap between the lower end of the template and the working chuck projecting below the area to be restored is sealed by inflating a sc leuch-shaped sealing body and the sealing body is relaxed again before pulling the template.
  • the working food does not have to be completely broken out in the upper area. It is also not necessary to use a special device to process the surface, rather it is sufficient to remove steel residues and other caking with the usually available excavation machine with a flat chisel. Delivery times and material requirements are shorter than with a complete outbreak and redelivery Stones. The permanent food underneath is not damaged.
  • the device for carrying out the method is designed in the manner set out in claims 2 to 4.
  • High-clay casting compounds for refractory concrete can be used to repair the upper zone of the wall area.
  • Fig. 1 shows a schematic representation of the steel jacket (1), the permanent chuck (2) and the working chuck (3) and (4).
  • the working feed in the lower area (3) still has sufficient residual strength.
  • the working food in the upper area (4) on the other hand, is so worn that the pan can no longer be used.
  • the working chuck in the upper area (4) has already been cleaned of steel residues and other caking.
  • the template (5) is hung into the pan from above.
  • An inwardly offset ring (6) is attached to the base of the template.
  • a tubular sealing body (7) made of flexible material is attached to the ring (6).
  • the sealing body (7) is inflatable. It can consist of plastic-reinforced rubber.
  • Damage is between the working chuck (3) and sealing body (7), a protective jacket (8).
  • This is attached with its upper edge, for example with a tab on the lower edge of the template (5). It consists of tear-resistant, flexible material and is cut so that it exerts pressure on the sealing body (7) with a prestress.
  • the sealing body (7) is inflated so that it is attached to the working chuck in the lower Area (3) in the transition to working feed in the upper area (4) tightly.
  • the template is then ready to repair the working feed in the upper area (4) by pouring refractory casting compound into the space between the remaining feed and the wall of the template (5).
  • Fig. 2 shows the state after the repair process has ended.
  • the tubular sealing body (7) is no longer pressurized.
  • the protective jacket (8) is no longer in contact with the working chuck in the lower area (3), but instead presses the tubular sealing body (7) against the ring (6) at the base of the template due to the internal pretension.
  • the template can now be pulled out upwards without damaging the sealing body (7) or the newly cast working chuck in the upper area (4).

Landscapes

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

Abstract

Il était difficile jusqu'à maintenant d'effectuer des réparations intermédiaires de la paroi monolithique réfractaire de revêtement de poches de coulée et de manutention d'acier lorsque la zone des scories était usée avant les autres zones. Selon ce nouveau procédé de reconstruction de la zone supérieure de la paroi réfractaire, on peut effectuer la réparation de manière économique en rendant étanche l'écartement entre l'extrémité inférieure du gabarit et le revêtement qui fait saillie au-dessous de la zone à reconstruire en gonflant un corps tubulaire d'étanchéité (7) et en dégonflant à nouveau le corps d'étanchéité (7) avant d'enlever le gabarit. Ce procédé est utile pour des poches de coulée et de manutention d'acier ou pour d'autres récipients métallurgiques similaires.
EP95908261A 1994-02-03 1995-02-03 Procede et dispositif de reconstruction partielle de la paroi de revetement de poches a acier en fusion Expired - Lifetime EP0742889B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4403271 1994-02-03
DE4403271A DE4403271C1 (de) 1994-02-03 1994-02-03 Verfahren und Vorrichtung zur teilweisen Wiederherstellung der Wandzustellung von Stahlgießpfannen
PCT/EP1995/000398 WO1995021363A1 (fr) 1994-02-03 1995-02-03 Procede et dispositif de reconstruction partielle de la paroi de revetement de poches a acier en fusion

Publications (2)

Publication Number Publication Date
EP0742889A1 true EP0742889A1 (fr) 1996-11-20
EP0742889B1 EP0742889B1 (fr) 1997-10-01

Family

ID=6509357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95908261A Expired - Lifetime EP0742889B1 (fr) 1994-02-03 1995-02-03 Procede et dispositif de reconstruction partielle de la paroi de revetement de poches a acier en fusion

Country Status (8)

Country Link
EP (1) EP0742889B1 (fr)
CZ (1) CZ284815B6 (fr)
DE (2) DE4403271C1 (fr)
ES (1) ES2110315T3 (fr)
FI (1) FI111188B (fr)
PL (1) PL178437B1 (fr)
WO (1) WO1995021363A1 (fr)
ZA (1) ZA95855B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632937A (en) * 1991-03-22 1997-05-27 Magneco/Metrel, Inc. Method of installing a refractory lining
DE19724509A1 (de) * 1997-06-11 1998-12-24 Gft Ges Fuer Feuerfest Technik Verfahren zur Reparatur und Zustellung von feuerfester Auskleidung
DE19724510A1 (de) * 1997-06-11 1998-12-24 Gft Ges Fuer Feuerfest Technik Torpedopfanne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1358186A (fr) * 1963-05-30 1964-04-10 Beteiligungs & Patentverw Gmbh Dispositif propre à empêcher les accidents lors de l'exécution de travaux dans les convertisseurs et analogues comportant des cuves pourvues d'un garnissage
BE693484A (fr) * 1966-02-03 1967-07-17
US4094938A (en) * 1974-03-08 1978-06-13 Serafim Vasilievich Kolpakov Method and apparatus for lining ladles
JPS53102803A (en) * 1977-02-22 1978-09-07 Nippon Steel Corp Automatic repairing device of furnace body opening
AT361150B (de) * 1979-02-20 1981-02-25 Frings Hermann H Vorrichtung zum auskleiden von gefaessen der metallurgie mit stampfmassen
JPS57190764A (en) * 1981-05-18 1982-11-24 Nippon Kokan Kk <Nkk> Split molding flask for casting

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9521363A1 *

Also Published As

Publication number Publication date
DE59500757D1 (de) 1997-11-06
ZA95855B (en) 1996-01-10
FI111188B (fi) 2003-06-13
WO1995021363A1 (fr) 1995-08-10
ES2110315T3 (es) 1998-02-01
CZ228596A3 (en) 1997-05-14
CZ284815B6 (cs) 1999-03-17
PL315810A1 (en) 1996-12-09
FI963060A7 (fi) 1996-10-01
FI963060A0 (fi) 1996-08-02
EP0742889B1 (fr) 1997-10-01
DE4403271C1 (de) 1995-06-01
PL178437B1 (pl) 2000-04-28

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