EP0835943B1 - Cloche inférieure pour le procédé CAS-OB - Google Patents

Cloche inférieure pour le procédé CAS-OB Download PDF

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Publication number
EP0835943B1
EP0835943B1 EP97114813A EP97114813A EP0835943B1 EP 0835943 B1 EP0835943 B1 EP 0835943B1 EP 97114813 A EP97114813 A EP 97114813A EP 97114813 A EP97114813 A EP 97114813A EP 0835943 B1 EP0835943 B1 EP 0835943B1
Authority
EP
European Patent Office
Prior art keywords
bell
flange
under
cas
reinforcement element
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
EP97114813A
Other languages
German (de)
English (en)
Other versions
EP0835943A1 (fr
Inventor
Edmund Fuchs
Gerald Nitzel
Hitoshi Kato
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.)
Foseco GmbH
Original Assignee
Foseco 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 Foseco GmbH filed Critical Foseco GmbH
Publication of EP0835943A1 publication Critical patent/EP0835943A1/fr
Application granted granted Critical
Publication of EP0835943B1 publication Critical patent/EP0835943B1/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0026—Introducing additives into the melt
    • 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
    • F27D2001/0046—Means to facilitate repair or replacement or prevent quick wearing

Definitions

  • the invention relates to a lower bell for the CAS-OB method according to the preamble of claim 1.
  • Such sub bells also called CAS OB sub bells, are connected with an upper bell and in the steel mill directly immersed in molten steel to inside the Bell to alloy the existing steel and / or those in it located melt by aluminothermic heating heat.
  • Known lower bells consist essentially of the Steel flange, which is used to hold the top bell, whereby a circumferential sheet metal jacket is attached to this steel flange becomes.
  • the sheet metal jacket then receives an inside and Outer cladding made of fireproof material so that it completely especially down from the refractory Material is surrounded.
  • Such a lower bell is used in the melt thermally stressed, from all sides, see above that in extreme cases with long temperature treatments Melting of the reinforcement and thus cracks and holes in the Refractory concrete can arise. Due to the Temperature stress from inside and outside can also be too Partitions between the outer part of the refractory material and the inner part of the refractory material come what also quickly leads to failure of the lower bell.
  • the present invention is concerned with a Improvement of the lower bell of the type mentioned in order to to achieve a longer lifespan. This is achieved by the in the characterizing parts of the claims specified characteristics.
  • the lower bell shows according to the invention no closed casing.
  • the Reinforcement part is in one embodiment by a A plurality of bars distributed evenly over the circumference educated. These are welded to the flange and are in turn provided with protruding parts.
  • the flange and the downward protruding bars are in a shape on all sides with refractory material, vibrating concrete or Pouring refractory concrete.
  • the conventional sheet metal jacket used for a lower bell is distributed over the circumference formed with a plurality of vertical slots.
  • the reinforcement part either as one A plurality of rods or as a sheet metal jacket with longitudinal slots is achieved that the inner and the outer part of the Refractory material is connected to each other so that no thermal stresses and cracks can occur. Of course, this leads to a longer service life the lower bell.
  • the rods of the lower part of the lower bell according to the Invention can be designed as gate steel rods and be equipped with V-anchors. You can use gaps on the scope between 100 and 300 mm and via a ring line be connected.
  • a similar construction according to the invention has between the vertical longitudinal slots of the sheet metal jacket V-anchor.
  • V and U-anchors can be attached to the mounting flange
  • the lifespan of lower bells according to the invention can a multiple of that of conventional under bells to reach.
  • the upper ring flange is 10 Inscribed bell. Inferior to this lower flange directed below a ring part which with the flange 10th connected is.
  • a plurality of rods 12 are on the ring flange attached, it can be round rods in the area trade from 10 to 20 mm in diameter. In the figure are only shown a total of six such rods.
  • the rods 12 are welded to the flange 10 and have substantially an axial extension.
  • There is one on each of the rods 12 A plurality of anchors, rods 14 or the like. Attached.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (4)

  1. Cloche inférieure destinée au procédé CAS-OB (Composition Adjustment by Sealed argon bubbling - Oxygen Blowing/ajustement de la composition par barbotage de l'argon, insufflation d'oxygène dans des conditions hermétiques) dans les aciéries, comprenant un collet orienté horizontalement, destiné à recevoir la cloche supérieure, et un élément de renforcement qui est fixé par une liaison métallique contre le collet et est enveloppé d'un matériau réfractaire, caractérisée en ce que l'élément de renforcement est formé par une pluralité de barres d'acier (12) verticales, qui sont fixées sur toute la périphérie du collet (10) en étant régulièrement réparties sur celui-ci et sont enveloppées d'un matériau réfractaire (11).
  2. Cloche inférieure selon la revendication 1, caractérisée en ce que les barres d'acier sont assemblées les unes avec les autres par l'intermédiaire d'une conduite annulaire.
  3. Cloche inférieure selon la revendication 1 ou 2, caractérisée en ce que les barres d'acier (12) comportent une pluralité de tiges (14) s'avançant en saillie.
  4. Cloche inférieure destinée au procédé CAS-OB (Composition Adjustment by Sealed argon bubbling - Oxygen Blowing) dans les aciéries, comprenant un collet orienté horizontalement, destiné à recevoir la cloche supérieure, et un élément de renforcement qui est fixé par une liaison métallique contre le collet et est enveloppé d'un matériau réfractaire, caractérisée en ce que l'élément de renforcement (12) est formé par une chemise métallique, qui est conçue avec une pluralité de fentes longitudinales orientées sensiblement dans la direction verticale.
EP97114813A 1996-10-09 1997-08-27 Cloche inférieure pour le procédé CAS-OB Expired - Lifetime EP0835943B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29617580U 1996-10-09
DE29617580U DE29617580U1 (de) 1996-10-09 1996-10-09 Unterglocke für das CAS-OB-Verfahren

Publications (2)

Publication Number Publication Date
EP0835943A1 EP0835943A1 (fr) 1998-04-15
EP0835943B1 true EP0835943B1 (fr) 2000-09-27

Family

ID=8030366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97114813A Expired - Lifetime EP0835943B1 (fr) 1996-10-09 1997-08-27 Cloche inférieure pour le procédé CAS-OB

Country Status (3)

Country Link
EP (1) EP0835943B1 (fr)
DE (2) DE29617580U1 (fr)
ES (1) ES2152609T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102978338B (zh) * 2012-11-26 2014-10-08 北京首钢自动化信息技术有限公司 一种cas-ob的自动控制方法
CN115284438A (zh) * 2022-07-22 2022-11-04 鞍山市和丰耐火材料有限公司 一种提高cas-ob浸渍罩下罩寿命的制作方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000466A1 (fr) * 1977-07-13 1979-02-07 VOEST-ALPINE Aktiengesellschaft Procédé d'introduction de matières granuleuses, dans un bain de métal fondu et dispositif pour la mise en oeuvre du procédé
SE8101242L (sv) * 1981-02-26 1982-08-27 Scandinavian Lancers Forfarande och anordning for spridning av teckmedel

Also Published As

Publication number Publication date
ES2152609T3 (es) 2001-02-01
EP0835943A1 (fr) 1998-04-15
DE59702400D1 (de) 2000-11-02
DE29617580U1 (de) 1996-12-12

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