EP0043787B1 - Feuerfeste, gasdurchlässige Baukörper - Google Patents

Feuerfeste, gasdurchlässige Baukörper Download PDF

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Publication number
EP0043787B1
EP0043787B1 EP81630045A EP81630045A EP0043787B1 EP 0043787 B1 EP0043787 B1 EP 0043787B1 EP 81630045 A EP81630045 A EP 81630045A EP 81630045 A EP81630045 A EP 81630045A EP 0043787 B1 EP0043787 B1 EP 0043787B1
Authority
EP
European Patent Office
Prior art keywords
gas
metal
metal housing
refractory
structural unit
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
Application number
EP81630045A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0043787A1 (de
Inventor
Bruno Hirschberg
François Schleimer
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Priority to AT81630045T priority Critical patent/ATE7310T1/de
Publication of EP0043787A1 publication Critical patent/EP0043787A1/de
Application granted granted Critical
Publication of EP0043787B1 publication Critical patent/EP0043787B1/de
Expired 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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

Definitions

  • the invention relates to refractory, gas-permeable structures for blowing a gas into a metal treatment vessel through its lining.
  • the oxygen-blowing processes used to fresh iron which are known under the names “LD”, “LDAC”, “OLP”, and “BOF” processes, have recently been improved in terms of metallurgy in such a way that secondary gases such as Nitrogen or argon can be injected in a controlled manner.
  • secondary gases such as Nitrogen or argon can be injected in a controlled manner.
  • the blowing of gas into the metal bath through the vessel bottom or the lining of the vessel walls can also be considered.
  • the applicant has shown a device for blowing a treatment gas into a metal bath intended for insertion into the bottom of a metal treatment vessel, which device has a noticeably improved durability compared to previously known gas-permeable stones and the blowing in of the desired amounts of gas allowed.
  • This device essentially consists of a refractory, gas-permeable stone, wherein a plurality of flat, corrugated, tubular or wire-shaped metallic separating members of small wall thickness are embedded in the refractory material in the axial direction.
  • this sink consists of steel sheets and segments or strips of refractory material in an alternating arrangement. The passage of gas takes place through the gaps formed within the stone along the metallic separators.
  • the applicant has shown designs and variants of such gas-permeable stones.
  • the sink or the segments forming it are surrounded by a metal housing which lies tightly, optionally with the interposition of a layer of mortar, on the longitudinal surfaces of the stone. The result of this is that the gas only emerges on the fire side of the stone, and furthermore the undesired, because uncontrollable, gas passage along the metal housing is to be prevented.
  • the metal housing may expand at higher gas pressures, as a result of which the metal housing is lifted off the sink and an undesirable joint is created between the stone and the metal housing.
  • the metal melt pig iron or steel
  • the metal melt can penetrate into this joint and there is a risk that the melt will break through to the cold side of the stone.
  • a refractory, gas-permeable structure in that it consists of a gas-permeable refractory stone which is sealed by a metal housing, optionally with the interposition of a mortar layer, in that the first metal housing is spaced from a second one Metal housing is surrounded, that a refractory, substantially gas-impermeable filling compound is arranged between the two metal housings and that at least one connection and a distribution space for the gas supply are arranged on an end face of the stone.
  • the second, outer metal housing expediently has a cylindrical or frustoconical shape with a circular cross section, which eliminates the risk that it in turn could be deformed. Furthermore, use is now also possible in such applications where sink blocks with a circular cross section are required, such as, for. B. in pans. Since the first, inner metal housing is now protected from deformations by the gas pressure, it does not bother if it has a rectangular or square cross section, as is desired in the interest of the rational production of the sink.
  • the first, inner metal housing in particular on the gas supply adjacent to it, ie. H. cold-side areas, sheet metal plates arranged, for. B. be welded, which protrude for anchoring in the refractory filler.
  • sheet metal plates can also be attached to the second, outer metal housing, which protrude outwards and, when the structure is installed, claw between the gas-permeable structure and the floor stones, for example in a furnace floor in the ramming mass surrounding the structure.
  • the gas-permeable refractory sink located within the first metal housing can consist of individual, on longitudinal surfaces, optionally with the interposition of Me tall overlays or inserts, adjacent segments (see, for example, the older European application EP-A1-43 338).
  • the sink or the segments can be provided with embedded, preferably also pressed-in pairs of sheets, the passage of gas taking place through the gap between the sheets of a pair.
  • the adjacent longitudinal surfaces of the segments can be provided with profiles, such as grooves or waves, in order to increase the gas permeability of the stones.
  • the sink or the segments forming it consist of burned or unfired, e.g. B. with a carbon carrier such as tar, pitch, synthetic resin, bound or chemically bound refractory material such as sintered magnesia, mixtures of magnesia and chrome ore, pre-reacted magnesia-chrome ore sintered grain, high alumina material.
  • a carbon carrier such as tar, pitch, synthetic resin, bound or chemically bound refractory material
  • sintered magnesia mixtures of magnesia and chrome ore, pre-reacted magnesia-chrome ore sintered grain, high alumina material.
  • refractories are also suitable for the filling compound, which is provided with a chemical or a carbon-containing binder, is introduced as a tamping or casting compound between the two metal housings.
  • steel sheet for. B. in a thickness between 1 and 3 mm.
  • the structure 1 consists of the actual sink 2, which is enclosed by a first, inner metal housing 3 with a rectangular cross section.
  • a second outer metal housing 4 with a circular cross section is arranged at a distance therefrom and the space between the two metal housings 3 and 4 is filled with a refractory filling compound 5.
  • Sheet metal plates 6 are welded to the inner metal housing 3 and protrude into the refractory filling compound 5 for anchoring.
  • the sink 2 located within the first metal housing 3 consists in the illustrated embodiment of twelve prefabricated segments 7 made of refractory material, which are arranged in two rows of six pieces. Sheet metal plates 8 are inserted into the joints between the segments 7, along which the gas passage takes place.
  • the segments 7 are spaced from the end face of the first metal housing 3 by means of two strips 9, which are arranged on the inside of the first metal housing 3 and are preferably fastened thereto by spot welding.
  • a plate 10 is welded tight.
  • This plate 10, shown partially broken away in the drawing, is provided with a pipe connection 11, via which the gas can be introduced into the distribution space that remains free between the plate 10 and the end face of the sink 2.
  • This z. B. provided with a chromate binder can be added with an addition of 4.5 wt .-% water, based on the dry mass, as ramming mass in the space between the two metal housings 3 and 4 and pounded there.
  • the mass in the space between the two metal housings 3 and 4 can be compressed by means of an internal vibrator introduced into the mass. If the amount of water added is even higher, use as a casting compound would also be possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Building Environments (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Insulated Conductors (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP81630045A 1980-07-09 1981-06-15 Feuerfeste, gasdurchlässige Baukörper Expired EP0043787B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81630045T ATE7310T1 (de) 1980-07-09 1981-06-15 Feuerfeste, gasdurchlaessige baukoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82597A LU82597A1 (de) 1980-07-09 1980-07-09 Feuerfester,gasdurchlaessiger baukoerper
LU82597 1980-07-09

Publications (2)

Publication Number Publication Date
EP0043787A1 EP0043787A1 (de) 1982-01-13
EP0043787B1 true EP0043787B1 (de) 1984-05-02

Family

ID=19729433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81630045A Expired EP0043787B1 (de) 1980-07-09 1981-06-15 Feuerfeste, gasdurchlässige Baukörper

Country Status (12)

Country Link
US (1) US4378106A (en, 2012)
EP (1) EP0043787B1 (en, 2012)
JP (1) JPS5747840A (en, 2012)
AT (1) ATE7310T1 (en, 2012)
AU (1) AU539753B2 (en, 2012)
BR (1) BR8104287A (en, 2012)
CA (1) CA1176460A (en, 2012)
DE (1) DE3163373D1 (en, 2012)
ES (1) ES259133Y (en, 2012)
LU (1) LU82597A1 (en, 2012)
PT (1) PT73305B (en, 2012)
ZA (1) ZA814143B (en, 2012)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU83247A1 (de) * 1981-03-23 1983-02-22 Arbed Verfahren und vorrichtung zum behandeln von metallschmelzen im rahmen metallurgischer prozesse
LU83313A1 (de) * 1981-04-22 1983-03-24 Arbed Verfahren und einrichtung zum direkten herstellen von fluessigem eisen
LU83314A1 (de) * 1981-04-24 1983-03-24 Arbed Verfahren und vorrichtung zum entschwefeln von eisenschmelzen
FR2516938B1 (fr) * 1981-11-23 1986-06-06 Usinor Dispositif pour l'introduction de gaz dans le bain de metal liquide
US4462576A (en) * 1982-02-24 1984-07-31 Didier-Werke Ag Apparatus for supplying gas through the wall of a metallurgical container
CA1206752A (fr) * 1982-06-18 1986-07-02 Jean Goedert Procede et dispositif pour vidanger des recipients metallurgiques
LU84213A1 (fr) * 1982-06-18 1983-11-23 Arbed Dispositif pour vidanger des recipients metallurgiques
DE3318422C2 (de) * 1983-05-20 1985-03-21 Didier-Werke Ag, 6200 Wiesbaden Gasspülanordnung und Verfahren zur Betätigung einer derartigen Anordnung
LU85131A1 (de) * 1983-12-12 1985-09-12 Arbed Gasdurchlaessiger baukoerper aus feuerfestem material
AT382889B (de) * 1984-03-15 1987-04-27 Voest Alpine Ag Spueleinrichtung fuer ein metallurgisches gefaess
US4754954A (en) * 1986-01-29 1988-07-05 Lazcano Navarro Arturo Refractory device for introducing a gas into a molten metal and a method for making the device
AT384034B (de) * 1986-02-03 1987-09-25 Voest Alpine Ag Spueleinrichtung fuer ein metallurgisches gefaess
DE3716388C1 (de) * 1987-05-15 1988-10-27 Radex Deutschland Ag Gasspuelstein
DE3734713A1 (de) * 1987-10-14 1989-04-27 Pa Ha Ge Huetten Und Giesserei Spuelstein fuer metallurgische gefaesse
JPH03104067U (en, 2012) * 1990-02-05 1991-10-29
US7192989B2 (en) * 2002-12-20 2007-03-20 Akzo Nobel N.V. Method and expansion device for preparing expanded thermoplastic microspheres
CN106825533A (zh) * 2015-12-03 2017-06-13 刘得顺 一种可修复组合型透气砖的制作方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021861A1 (fr) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Pièce réfractaire perméable aux gaz et son procédé de fabrication
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU30391A1 (en, 2012) * 1949-11-03
DE1726983U (de) * 1956-05-29 1956-07-26 Aluminiumwerke Nuernberg G M B Vorrichtung zur gaseinfuehrung in metallische schmelzen.
FR90233E (fr) * 1966-06-27 1967-11-03 Air Liquide Perfectionnement aux injecteurs, tuyères et brûleurs pour fours métallurgiques
NL296346A (en, 2012) * 1962-08-07
US3610602A (en) * 1969-10-14 1971-10-05 United States Steel Corp Gas-permeable refractory plug and method
JPS52722B2 (en, 2012) * 1973-01-25 1977-01-10
JPS505849U (en, 2012) * 1973-05-14 1975-01-22
GB1452909A (en) * 1973-10-24 1976-10-20 Electricity Council Injectors for injecting gas into molten metal
SE392479B (sv) * 1974-03-20 1977-03-28 Asea Ab Forma vid metallurgiska konvertrar och smeltugnar
CH595130A5 (en, 2012) * 1975-04-24 1978-01-31 Alusuisse
JPS5610433Y2 (en, 2012) * 1976-03-24 1981-03-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021861A1 (fr) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Pièce réfractaire perméable aux gaz et son procédé de fabrication
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper

Also Published As

Publication number Publication date
JPH028004B2 (en, 2012) 1990-02-22
ES259133U (es) 1982-01-01
EP0043787A1 (de) 1982-01-13
DE3163373D1 (en) 1984-06-07
JPS5747840A (en) 1982-03-18
LU82597A1 (de) 1982-02-17
ES259133Y (es) 1982-06-16
PT73305A (de) 1981-08-01
PT73305B (de) 1982-09-01
US4378106A (en) 1983-03-29
AU7264281A (en) 1982-01-14
AU539753B2 (en) 1984-10-11
ZA814143B (en) 1982-07-28
CA1176460A (en) 1984-10-23
BR8104287A (pt) 1982-03-23
ATE7310T1 (de) 1984-05-15

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