EP0043338A1 - Elément réfractaire perméable aux gaz - Google Patents

Elément réfractaire perméable aux gaz Download PDF

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Publication number
EP0043338A1
EP0043338A1 EP81630044A EP81630044A EP0043338A1 EP 0043338 A1 EP0043338 A1 EP 0043338A1 EP 81630044 A EP81630044 A EP 81630044A EP 81630044 A EP81630044 A EP 81630044A EP 0043338 A1 EP0043338 A1 EP 0043338A1
Authority
EP
European Patent Office
Prior art keywords
metal
segments
gas
structure according
building structure
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
EP81630044A
Other languages
German (de)
English (en)
Other versions
EP0043338B1 (fr
Inventor
Fritz Hödl
Friedrich Kassegger
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
Priority claimed from LU82553A external-priority patent/LU82553A1/de
Priority claimed from LU82552A external-priority patent/LU82552A1/de
Priority claimed from LU82554A external-priority patent/LU82554A1/de
Application filed by Arbed SA filed Critical Arbed SA
Priority to AT81630044T priority Critical patent/ATE15389T1/de
Publication of EP0043338A1 publication Critical patent/EP0043338A1/fr
Application granted granted Critical
Publication of EP0043338B1 publication Critical patent/EP0043338B1/fr
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
    • 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

Definitions

  • the invention relates to refractory, gas-permeable structures for blowing a gas into a metal treatment vessel through its lining.
  • the oxygen-blowing process used for pig iron freshening which are known under the names "LD”, “LDAC”, “OLP”, “BOF” processes, have recently been improved in metallurgical terms to the effect that secondary gases such as Nitrogen or argon, can be injected in a controlled manner.
  • secondary gases such as Nitrogen or argon
  • the blowing of gas into the metal bath through the vessel bottom or the lining of the vessel walls can also be considered.
  • the gas-permeable refractory bricks through which the gas is introduced are required to be inserted into the lining of the base or the side walls of the vessel, so that their durability corresponds to that of the other refractory linings, as a replacement of worn-out gas bubbles in the hot state, for example in one Converter floor is difficult.
  • the introduction of gas should be possible both continuously and in particular discontinuously; i.e. the vessel should also be operable without the introduction of gas and after the gas supply is switched on again, the stones should be permeable to gas in an unchanged manner.
  • the gas permeability of the stones over their service life, i.e. over an entire oven trip remain essentially the same.
  • patent application LU 81.208 the applicant has shown a device for blowing a treatment gas into a metal bath which is intended for insertion into the bottom of a metal treatment vessel and which has a noticeably improved durability compared to the gas-permeable stones known hitherto and allows the desired amounts of gas to be blown in.
  • This device essentially consists of a refractory, gas-permeable structure, a plurality of flat, corrugated, tubular or wire-shaped metallic separating members of small wall thickness being embedded in the refractory material in the axial direction.
  • this structure consists of steel sheets and segments or strips of refractory material in an alternating arrangement.
  • a prefabricated block of refractory material has to be cut into the required strips or segments, which is a very complex manufacturing step. Since the segments generally have a small thickness and a large length, segments produced by pressing refractory material are not sufficiently manageable and warp if they are subjected to a stone fire.
  • An object of the invention is to improve the structure of such structures in such a way that simplified manufacture is possible and prefabricated segments with sufficient stability can be used.
  • Another task is to increase the gas throughput capacity without compromising the good durability of the structure.
  • the structures consist of at least two fire-resistant, fired or unfired, e.g. segments composed of a carbon carrier such as tar, pitch, synthetic resin-bonded or chemically bonded material are built up, of which at least one of the adjoining longitudinal surfaces is provided with a metal layer, that the segments are combined by a common metal housing which is sealed to the longitudinal surfaces of the segments , optionally with the interposition of a mortar layer, and that at least one connection and a distribution space for the gas supply are arranged on an end face of the structure.
  • a carbon carrier such as tar, pitch, synthetic resin-bonded or chemically bonded material
  • the metal layers can be supports pressed with the refractory material.
  • a second embodiment of the structure according to the invention provides that the metal layers lie against the refractory material, i.e. are not pressed with the material.
  • the structures according to the invention can be designed in such a way that the adjoining longitudinal surfaces of the segments have a smooth surface or a profiled, for example corrugated or grooved surface and also in such a way that the segments lie against one another with the interposition of metal plates, pairs of metal plates and / or spacers.
  • the latter can be made from beads or knobs formed in the metal layers, from sheet metal strips, wires or from combustible or vaporizable deposits and the like.
  • a further embodiment can consist in that a second support, for example a sheet metal plate, is attached, for example welded, to a metal layer which is also pressed in and that the adjacent longitudinal surface of the neighboring segment is free of metal layers.
  • the profiles can be formed in the longitudinal surfaces of the prefabricated segments made of refractory material by cutting or milling.
  • the segments with co-pressed metal supports with a profiled surface can be produced in a simple manner by the pressing die or the mold wall having the corresponding profiling, e.g. Corrugation or creasing, is provided and an initially flat sheet metal plate and the refractory mass are introduced into the press mold. During the pressing process, the profiling is then automatically formed in the pressed sheet metal plate.
  • profiling e.g. Corrugation or creasing
  • the profiled longitudinal surfaces being able to rest against both a smooth and a profiled longitudinal surface of the neighboring segment.
  • the adjacent longitudinal surface of the neighboring segment can in turn be provided with a pressed-on metal support or it can be free of supports.
  • a further embodiment of the structure according to the invention can consist in that at least one co-pressed pair of adjacent metal inserts, for example sheet metal plates, is embedded in individual segments or in all segments. Spacers of the type mentioned above can be arranged between the metal plates of a pair of inserts. The extent of the gas permeability can be varied further by the number of pairs of inserts arranged in a structure and by their configuration with spacers.
  • the structure can be produced in a simple manner by first introducing part of the refractory material into the press mold, then inserting the insert pair, which extends over the entire stone length but only over a part of the stone width, and finally further refractory Material is filled. If the structure is to have more than one pair of inserts, this process is repeated accordingly. Then the pressing pressure is applied perpendicular to the inserts and the structure is thereby shaped. After removal from the press, the inserts on the end faces of the building are exposed to allow gas to pass through.
  • a folded sheet or a compressed tube can also be used. Multi-layer inserts, possibly with spacer elements, are also possible.
  • the extent of the gas permeability can be varied by the number of insert pairs arranged in a structure. Since the refractory material used for the building structure can correspond to that of the remaining lining, the building structure has the same durability as the lining surrounding it. An early renewal of the gas passage stones is not necessary.
  • the structures can also be operated without gas supply. While some metal penetrates into the narrow gap between the inserts of a couple, when the gas supply line is switched on again, this penetrated metal is flushed out of the structure and the original gas permeability is restored. This remains essentially the same over the entire service life of the structure.
  • the structure 1 shown in the figure has a e.g. Metal housing 2 constructed from welded plates, which surrounds a total of twelve segments 3, which are arranged in two rows of six pieces each. Each segment 3 has a co-pressed metal support 4 and lies with an unreinforced side surface with the interposition of a mortar layer, not shown, close to the inside of the metal housing 2. This prevents the undesirable, because uncontrollable, gas flow along the metal housing.
  • a sheet metal plate 5 is inserted between the two rows of the segments 3, along which a gas passage can take place, as well as along the metal supports 4 of the segments 3.
  • a pair of plates can also be arranged.
  • the sheet metal plate 5 or the pair of plates can be mortared.
  • the segments 3 are spaced from the end face of the metal housing by means of two strips 6, which are arranged on the inside of the metal housing 2 and are preferably attached to it by spot welding. On this side, which represents the cold side, an end plate 7 is welded tight, which is provided with a pipe connection 8. The space remaining between the end plate 7 and the end faces of the segments 3 is the distribution space for the gas.
  • the opposite side of the front side 7, not visible, represents the fire side of the building and can be closed with a cover plate.
  • the latter is used when the delivery of the metal treatment vessel surrounding the structure is tar or the like Contains carbon carrier. It then serves to prevent the penetration of tar or the like into the gas passage joints of the structure and the sticking of the same during the heating of the vessel.
  • the cover plate melts at the start of operation and releases the joints.
  • a bracket (not shown) can be attached in the area of the fire-side end face of the structure, by means of which the structure can be hung on a crane hook.
  • FIG. 6 shows a segment 34, which is provided on one longitudinal surface with a profiled and indeed a corrugated metal support 44 and on the opposite longitudinal surface with a flat metal support 4.
  • FIG. 7 shows a segment 35 which can replace three segments 3 of the structure according to FIG. 1.
  • This segment 35 is provided with a U-shaped co-pressed metal support 45 and two pairs of sheet metal inserts 10, which extend over the entire length but only over part of the width of the segment 35.
  • these inserts 10 can be designed as smooth sheet metal strips or, as shown in FIG. 8, as sheet metal strips provided with spacers, such as beads or grooves 11. To improve the connection between the stone mass and the inserts 10, these can be provided with claws 9.
  • the structure 1 shown in FIG. 9 has a metal housing 2 which surrounds twelve segments, each in two rows of six pieces are arranged. Each segment is provided with a profile on a longitudinal surface, specifically a profile in the form of grooves in the upper segments 34a and one in the form of waves in the lower segments 34. In practice, however, the same type of profiling will be used for all segments.
  • Flat sheet metal plates are inserted in the joints between two segments of a row; but the insoles can also be profiled. be provided. An insert in the form of a pair of sheet metal plates is shown between the two rows.
  • the building body 1 shown in FIG. 10 has a metal housing 2 which surrounds four segments 35. These four segments lie against one another with their U-shaped, pressed-in metal supports 45, whereas the unreinforced long sides of the segments lie against the inside of the housing, which e.g. is made from welded plates.
  • Sheet metal is particularly suitable as the material for the metallic inserts, e.g. in a thickness between 0.5 and 3 mm, which can optionally be provided with a surface protection.
  • the structure can be made from a tar-bound magnesia mass with the following composition and grain structure: 4% by weight of coal tar pitch are added to the sintered magnesia as a binder.
  • tars, pitches, synthetic resins or the like also come as binders. into consideration.
  • a further production of a stone suitable for use in a structure according to the invention has the following composition and the following grain structure: Grain sizes
  • the components are mixed with 3.7% by weight kieserite solution with a density of 1.22 g / cm3 for chemical bonding.
  • the invention is not limited to the refractory materials mentioned.
  • Other refractory materials e.g. Mixtures of magnesia and chrome ore, tweeter material are used.
  • the structures according to the invention have sufficient gas permeability, the passage of gas taking place on the one hand through the joints between the individual segments and on the other hand through the joints between the metal inserts.
  • the segments themselves have practically no gas permeability, and therefore the refractory material used for the structure can correspond to that of the rest of the lining of the metal treatment vessel.
  • the gas-permeable structures have the same durability as the lining around them, and one before It is not necessary to renew the gas-permeable structures at an early stage.
  • a metal plate is generally provided in each joint of the structure through which gas is to pass, whether in the form of metal layers on the segments or in the form of metal plates arranged between the segments.
  • these metal plates or supports prevent the penetration of metal from the metal bath of the treatment vessel into the joints, even in the case of the treatment of pig iron, which due to its consistency and viscosity has a particularly strong tendency to penetrate into the joints.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Gas Separation By Absorption (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP81630044A 1980-06-25 1981-06-15 Elément réfractaire perméable aux gaz Expired EP0043338B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81630044T ATE15389T1 (de) 1980-06-25 1981-06-15 Feuerfeste, gasdurchlaessige baukoerper.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
LU82552 1980-06-25
LU82553 1980-06-25
LU82553A LU82553A1 (de) 1980-06-25 1980-06-25 Feuerfester,gasdurchlaessiger baukoerper
LU82552A LU82552A1 (de) 1980-06-25 1980-06-25 Feuerfester,gasdurchlaessiger baukoerper
LU82554 1980-06-25
LU82554A LU82554A1 (de) 1980-06-25 1980-06-25 Feuerfester,gasdurchlaessiger baukoerper

Publications (2)

Publication Number Publication Date
EP0043338A1 true EP0043338A1 (fr) 1982-01-06
EP0043338B1 EP0043338B1 (fr) 1985-09-04

Family

ID=27350740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81630044A Expired EP0043338B1 (fr) 1980-06-25 1981-06-15 Elément réfractaire perméable aux gaz

Country Status (14)

Country Link
US (1) US4395026A (fr)
EP (1) EP0043338B1 (fr)
AU (1) AU539352B2 (fr)
BR (1) BR8103982A (fr)
CA (1) CA1177643A (fr)
CS (1) CS241483B2 (fr)
DD (1) DD159783A5 (fr)
DE (1) DE3172127D1 (fr)
ES (1) ES259132Y (fr)
IN (1) IN155938B (fr)
PL (1) PL132680B1 (fr)
PT (1) PT73175B (fr)
RO (1) RO82232A (fr)
SU (1) SU1255057A3 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061987A1 (fr) * 1981-03-23 1982-10-06 Arbed S.A. Procédé et dispositif pour le traitement de métaux fondus dans le cadre de la métallurgie
EP0063532A1 (fr) * 1981-04-22 1982-10-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0064019A1 (fr) * 1981-04-24 1982-11-03 Arbed S.A. Procédé et installation de désulfuration de fer fondu
EP0084288A1 (fr) * 1981-12-09 1983-07-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0095436A1 (fr) * 1982-05-25 1983-11-30 Arbed S.A. Pièces réfractaires perméables au gaz
EP0097610A1 (fr) * 1982-06-18 1984-01-04 Arbed S.A. Procédé et dispositif pour vidanger des récipients métallurgiques
EP0043787B1 (fr) * 1980-07-09 1984-05-02 Arbed S.A. Elément réfractaire perméable aux gaz
FR2538410A1 (fr) * 1982-12-24 1984-06-29 Siderurgie Fse Inst Rech Element refractaire porte-tuyere et procede de prevention de l'usure du refractaire faisant application dudit element
EP0146079A2 (fr) * 1983-12-12 1985-06-26 Arbed S.A. Pièce réfractaire perméable aux gaz
EP0155255A2 (fr) * 1984-03-15 1985-09-18 VOEST-ALPINE Aktiengesellschaft Dispositif de rinçage pour un récipient métallurgique
US4744546A (en) * 1986-02-03 1988-05-17 Voest-Alpine Aktiengesellschaft Flushing arrangement for a metallurgical vessel
GB2276437A (en) * 1991-06-18 1994-09-28 Insul Co Inc A device for insufflating gas into molten metal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4462576A (en) * 1982-02-24 1984-07-31 Didier-Werke Ag Apparatus for supplying gas through the wall of a metallurgical container
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
JP3613686B1 (ja) * 2003-07-25 2005-01-26 日本坩堝株式会社 溶湯運搬用取鍋及び溶湯出湯方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758693B1 (de) * 1967-07-26 1971-07-15 Ct Nat De Rech S Metallurg Ass Verfahren und Vorrichtung zum Behandeln fluessigen Metalls in einer Pfanne durch Hindurchblasen von Gas durch das Metallbad
DE2205656B2 (fr) * 1972-02-07 1974-04-18 Uralskij Nautschno-Issledowatelskij Institut Tschernych Metallow, Swerdlowsk (Sowjetunion)
FR2455008A1 (fr) * 1979-04-25 1980-11-21 Siderurgie Fse Inst Rech Piece refractaire a permeabilite selective et orientee pour l'insufflation d'un fluide
DE8028296U1 (de) * 1980-10-23 1981-05-27 Arbed S.A., Luxembourg Gasdurchlässiger Ausmauerungskörper aus feuerfestem Material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE392479B (sv) * 1974-03-20 1977-03-28 Asea Ab Forma vid metallurgiska konvertrar och smeltugnar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758693B1 (de) * 1967-07-26 1971-07-15 Ct Nat De Rech S Metallurg Ass Verfahren und Vorrichtung zum Behandeln fluessigen Metalls in einer Pfanne durch Hindurchblasen von Gas durch das Metallbad
DE2205656B2 (fr) * 1972-02-07 1974-04-18 Uralskij Nautschno-Issledowatelskij Institut Tschernych Metallow, Swerdlowsk (Sowjetunion)
FR2455008A1 (fr) * 1979-04-25 1980-11-21 Siderurgie Fse Inst Rech Piece refractaire a permeabilite selective et orientee pour l'insufflation d'un fluide
LU81208A1 (fr) * 1979-04-25 1980-12-16 Arbed Dispositif pour l'injection de gaz a travers le fond dans le bain metallique contenu dans un recipient d'affinage
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
DE8028296U1 (de) * 1980-10-23 1981-05-27 Arbed S.A., Luxembourg Gasdurchlässiger Ausmauerungskörper aus feuerfestem Material

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Radex-Rundschau, Nr. 3, September 1981 Radenthein U. HUTTER et al. "Konverterspulsteine mit Gerichteter Porositat" seiten 499 bis 517 *
Technische Mitteilungen, Band 69, Nr. 12, Dezember 1976 Essen M. OBERBACH et al. "Feuerfeste Werkstoffe fur den Einsatz von Spul- und Tragergasen in der Metallurgie" seiten 620 bis 628 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043787B1 (fr) * 1980-07-09 1984-05-02 Arbed S.A. Elément réfractaire perméable aux gaz
EP0061987A1 (fr) * 1981-03-23 1982-10-06 Arbed S.A. Procédé et dispositif pour le traitement de métaux fondus dans le cadre de la métallurgie
EP0063532A1 (fr) * 1981-04-22 1982-10-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0064019A1 (fr) * 1981-04-24 1982-11-03 Arbed S.A. Procédé et installation de désulfuration de fer fondu
EP0084288A1 (fr) * 1981-12-09 1983-07-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0095436A1 (fr) * 1982-05-25 1983-11-30 Arbed S.A. Pièces réfractaires perméables au gaz
EP0097610A1 (fr) * 1982-06-18 1984-01-04 Arbed S.A. Procédé et dispositif pour vidanger des récipients métallurgiques
EP0112769A2 (fr) * 1982-12-24 1984-07-04 Institut De Recherches De La Siderurgie Francaise (Irsid) Elément réfractaire porte-tuyère et procédé de prévention de l'usure du réfractaire faisant application dudit élément
FR2538410A1 (fr) * 1982-12-24 1984-06-29 Siderurgie Fse Inst Rech Element refractaire porte-tuyere et procede de prevention de l'usure du refractaire faisant application dudit element
EP0112769A3 (en) * 1982-12-24 1984-08-01 Institut De Recherches De La Siderurgie Francaise (Irsid) Holder for a tuyere made of refractory material, and process for preventing wear during use
EP0146079A2 (fr) * 1983-12-12 1985-06-26 Arbed S.A. Pièce réfractaire perméable aux gaz
EP0146079A3 (en) * 1983-12-12 1987-01-07 Arbed S.A. Gas-permeable refractory plug
EP0155255A2 (fr) * 1984-03-15 1985-09-18 VOEST-ALPINE Aktiengesellschaft Dispositif de rinçage pour un récipient métallurgique
EP0155255A3 (fr) * 1984-03-15 1986-07-16 VOEST-ALPINE Aktiengesellschaft Dispositif de rinçage pour un récipient métallurgique
US4744546A (en) * 1986-02-03 1988-05-17 Voest-Alpine Aktiengesellschaft Flushing arrangement for a metallurgical vessel
GB2276437A (en) * 1991-06-18 1994-09-28 Insul Co Inc A device for insufflating gas into molten metal

Also Published As

Publication number Publication date
SU1255057A3 (ru) 1986-08-30
RO82232B (ro) 1983-07-30
RO82232A (fr) 1983-08-03
PT73175B (en) 1982-09-01
CS386581A2 (en) 1985-07-16
EP0043338B1 (fr) 1985-09-04
DE3172127D1 (en) 1985-10-10
AU539352B2 (en) 1984-09-20
AU7216481A (en) 1982-01-07
ES259132Y (es) 1984-03-16
BR8103982A (pt) 1982-03-09
IN155938B (fr) 1985-03-23
CS241483B2 (en) 1986-03-13
PT73175A (en) 1981-07-01
ES259132U (es) 1983-07-16
DD159783A5 (de) 1983-04-06
PL132680B1 (en) 1985-03-30
PL231843A1 (fr) 1982-03-15
US4395026A (en) 1983-07-26
CA1177643A (fr) 1984-11-13

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