EP0112769A2 - Düsenträger aus feuerfestem Material sowie Verfahren zur Verminderung seines Verschleisses während der Benutzung - Google Patents

Düsenträger aus feuerfestem Material sowie Verfahren zur Verminderung seines Verschleisses während der Benutzung Download PDF

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Publication number
EP0112769A2
EP0112769A2 EP83402453A EP83402453A EP0112769A2 EP 0112769 A2 EP0112769 A2 EP 0112769A2 EP 83402453 A EP83402453 A EP 83402453A EP 83402453 A EP83402453 A EP 83402453A EP 0112769 A2 EP0112769 A2 EP 0112769A2
Authority
EP
European Patent Office
Prior art keywords
refractory
nozzle
liquid
source
blowing
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
EP83402453A
Other languages
English (en)
French (fr)
Other versions
EP0112769A3 (en
EP0112769B1 (de
Inventor
Eric Lienaux
Hugues Zanetta
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT83402453T priority Critical patent/ATE27308T1/de
Publication of EP0112769A2 publication Critical patent/EP0112769A2/de
Publication of EP0112769A3 publication Critical patent/EP0112769A3/fr
Application granted granted Critical
Publication of EP0112769B1 publication Critical patent/EP0112769B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • 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
    • C21C5/48—Bottoms or tuyéres of converters
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the invention relates to a refractory nozzle-holder element for a container for treating a liquid metal, of the type comprising a refractory mass surrounding an injection nozzle, said refractory mass being provided with passages connected to a source of pressurized auxiliary fluid and opening into the liquid metal bath.
  • the object of the invention is to propose an element free from the above-mentioned drawbacks, easy to produce, and allowing effective protection of the refractories surrounding the converter nozzles.
  • the refractory element comprises an assemblage of several compact refractory sub-elements separated by thin slits performing the role of said passages and connected to a source of liquid or gaseous carbonated agent capable of providing protective carbon by impregnating the upper layers of the refractory element.
  • the assembly of sub-elements can be advantageously belted by a sheet metal envelope and be kept at a distance from a fono plate so as to form a space for distribution of the carbonaceous agent, which is preferably a hydrocarbon, and, advantageously of licuid fuel.
  • the carbonaceous agent which is preferably a hydrocarbon, and, advantageously of licuid fuel.
  • the invention also relates to a method of preventing wear of the refractories from the bottom of a metsiluric container comprising nozzle-holder elements of the type mentioned at the head of this thesis.
  • a liquid or gaseous carbonated agent preferably a hydrocarbon such as liquid fuel
  • a hydrocarbon such as liquid fuel
  • one of the determining aspects of the invention resides in the fact that around the nose of the nozzle where the refining oxygen opens, a fuel diffusion area is created to impregnate carbon with the surface and upper layers of the refractory.
  • This carbon has a double role of chemical protection against iron oxides (such as Fe0) attacking the refractory, and thermomechanical protection by creating a layer endowed with a certain elasticity.
  • Figure 1 shows a refractory element 1 whose shape is substantially that of a pyramid trunk with a rectangular base tapering slightly upwards.
  • the element may have a base of 15G x 110 mm 2 at the bottom and 142 x 105 mm 2 at the top, for 275 mm in height.
  • Element 1 consists of four sub-elements 2, 3, 4, 5 juxtaposed, formed by plates of conventional compact refractory material, for example in magnesia. These plates are assembled by a metal casing 6 1.5 mm thick. A narrow slot 17 is maintained between the neighboring plates by means of threaded spacers 7 calibrated (for example 0.1 mm in diameter).
  • the sheet 6 is welded to a bottom plate 8 3 mm thick, tooth the refractory plates 2, 3, 4, 5 are kept separated by shims 9 of calibrated height making it possible to reserve a space 10 of 2 in thickness for example.
  • the oxygen blowing nozzle is housed in a cylindrical recess 12 of 22 ssa in diameter produced between the two central plates 3 and 4.
  • Figure 1 there is mounted in the recess 12 a double nozzle consisting of the central tube 11 for blowing oxygen connected to an oxygen source 14 and the outer tube 13 leaving an annular passage for fuel supplied by a source 15 .
  • the lower space 10 is supplied with fuel by a second source 16, through the bottom plate 8.
  • the fuel is distributed at a pressure of 4 to 5 bars, which feeds the slots 17, and opens with a speed substantially close to zero in the metal, which ensures its diffusion.
  • Bosses 18 of the tube 11 make it possible to maintain the radial spacing auffisabt (for example 1 axa) between the tube 11 and the recess 12.
  • the plates 2, 3, 4, 5 can be bare, or, at least partially, buried, for example on their faces delimiting slots 17 in order to facilitate the evacuation of the fuel or to avoid its infiltration in the mass of the element. Furthermore, the spacers made are not absolutely essential, so that the passage slots 17 can perfectly be obtained by simple juxtspoaition of the refractory plates therebetween.
  • the invention is not limited to the use of fuel put tobacco with any other hydro-carbonated agent, preferably liquid, and capable, by impregnating the upper layers of the refractory, of bringing it protective carbon.
  • the nozzle is not necessarily placed between two refractory plates put may very well be housed in a recess formed within a plate.
  • the invention is of general application to any treatment of a molten metal in a poor metallurgical receptacle provided with injectors for blowing a trsitssent agent below the level of the bath.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP83402453A 1982-12-24 1983-12-19 Düsenträger aus feuerfestem Material sowie Verfahren zur Verminderung seines Verschleisses während der Benutzung Expired EP0112769B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83402453T ATE27308T1 (de) 1982-12-24 1983-12-19 Duesentraeger aus feuerfestem material sowie verfahren zur verminderung seines verschleisses waehrend der benutzung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8221764A FR2538410B1 (fr) 1982-12-24 1982-12-24 Element refractaire porte-tuyere et procede de prevention de l'usure du refractaire faisant application dudit element
FR8221764 1982-12-24

Publications (3)

Publication Number Publication Date
EP0112769A2 true EP0112769A2 (de) 1984-07-04
EP0112769A3 EP0112769A3 (en) 1984-08-01
EP0112769B1 EP0112769B1 (de) 1987-05-20

Family

ID=9280504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402453A Expired EP0112769B1 (de) 1982-12-24 1983-12-19 Düsenträger aus feuerfestem Material sowie Verfahren zur Verminderung seines Verschleisses während der Benutzung

Country Status (6)

Country Link
EP (1) EP0112769B1 (de)
JP (1) JPS59133312A (de)
AT (1) ATE27308T1 (de)
CA (1) CA1222870A (de)
DE (1) DE3371650D1 (de)
FR (1) FR2538410B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270518A2 (de) * 1986-12-02 1988-06-08 Radex Austria Aktiengesellschaft für feuerfeste Erzeugnisse Behälter zur Behandlung von hochschmelzenden Stoffen, feuerfester Stein für die Zustellung und Verfahren zum Betrieb eines solchen Behälters
FR2647121A1 (fr) * 1989-05-18 1990-11-23 Radex Heraklith Bloc d'insufflation en ceramique refractaire et procede pour insuffler des gaz de traitement dans un receptacle de masse metallurgique fondue
AT396438B (de) * 1988-03-25 1993-09-27 Radex Heraklith Vorrichtung zum einführen eines behandlungsgases in die schmelze eines metallurgischen schmelzgefässes
AT402735B (de) * 1989-03-08 1997-08-25 Veitsch Radex Ag Gasspülstein mit gerichteter porosität
US6367487B1 (en) * 1999-08-11 2002-04-09 Diversey Lever, Inc. Anti-etch and cleaning composition for glass bottles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543169A (fr) * 1964-02-06 1900-01-01 Buse à tubes capillaires
DE1138409B (de) * 1954-05-28 1962-10-25 Huettenwerk Oberhausen Ag Blasduese zum Frischen von Metallen
FR1347014A (fr) * 1962-08-07 1963-12-27 Air Liquide Perfectionnement aux injecteurs, tuyères et brûleurs pour fours métallurgiques
FR2238683A1 (de) * 1973-07-27 1975-02-21 Didier Werke Ag
EP0021861A1 (de) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Gasdurchlässiger Körper aus feuerfestem Material und Verfahren zu seiner Herstellung
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper
FR2507208A1 (fr) * 1981-06-03 1982-12-10 Nippon Kokan Kk Tuyere d'insufflation de gaz pour l'affinage d'un metal fondu, sa fabrication et son utilisation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138409B (de) * 1954-05-28 1962-10-25 Huettenwerk Oberhausen Ag Blasduese zum Frischen von Metallen
FR1347014A (fr) * 1962-08-07 1963-12-27 Air Liquide Perfectionnement aux injecteurs, tuyères et brûleurs pour fours métallurgiques
FR1543169A (fr) * 1964-02-06 1900-01-01 Buse à tubes capillaires
FR2238683A1 (de) * 1973-07-27 1975-02-21 Didier Werke Ag
EP0021861A1 (de) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Gasdurchlässiger Körper aus feuerfestem Material und Verfahren zu seiner Herstellung
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper
FR2507208A1 (fr) * 1981-06-03 1982-12-10 Nippon Kokan Kk Tuyere d'insufflation de gaz pour l'affinage d'un metal fondu, sa fabrication et son utilisation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270518A2 (de) * 1986-12-02 1988-06-08 Radex Austria Aktiengesellschaft für feuerfeste Erzeugnisse Behälter zur Behandlung von hochschmelzenden Stoffen, feuerfester Stein für die Zustellung und Verfahren zum Betrieb eines solchen Behälters
EP0270518A3 (de) * 1986-12-02 1989-12-27 Radex Austria Aktiengesellschaft für feuerfeste Erzeugnisse Behälter zur Behandlung von hochschmelzenden Stoffen, feuerfester Stein für die Zustellung und Verfahren zum Betrieb eines solchen Behälters
AT396438B (de) * 1988-03-25 1993-09-27 Radex Heraklith Vorrichtung zum einführen eines behandlungsgases in die schmelze eines metallurgischen schmelzgefässes
AT402735B (de) * 1989-03-08 1997-08-25 Veitsch Radex Ag Gasspülstein mit gerichteter porosität
FR2647121A1 (fr) * 1989-05-18 1990-11-23 Radex Heraklith Bloc d'insufflation en ceramique refractaire et procede pour insuffler des gaz de traitement dans un receptacle de masse metallurgique fondue
US6367487B1 (en) * 1999-08-11 2002-04-09 Diversey Lever, Inc. Anti-etch and cleaning composition for glass bottles

Also Published As

Publication number Publication date
CA1222870A (fr) 1987-06-16
EP0112769A3 (en) 1984-08-01
EP0112769B1 (de) 1987-05-20
ATE27308T1 (de) 1987-06-15
JPS59133312A (ja) 1984-07-31
FR2538410B1 (fr) 1988-04-29
DE3371650D1 (en) 1987-06-25
FR2538410A1 (fr) 1984-06-29

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