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EP0146079B1 - Pièce réfractaire perméable aux gaz - Google Patents

Pièce réfractaire perméable aux gaz Download PDF

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Publication number
EP0146079B1
EP0146079B1 EP84114799A EP84114799A EP0146079B1 EP 0146079 B1 EP0146079 B1 EP 0146079B1 EP 84114799 A EP84114799 A EP 84114799A EP 84114799 A EP84114799 A EP 84114799A EP 0146079 B1 EP0146079 B1 EP 0146079B1
Authority
EP
European Patent Office
Prior art keywords
gas
refractory material
plug
metal
channels
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
EP84114799A
Other languages
German (de)
English (en)
Other versions
EP0146079A3 (en
EP0146079A2 (fr
Inventor
Jean-François Liesch
Friedrich Kassegger
Rudolf Handler
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 AT84114799T priority Critical patent/ATE50797T1/de
Publication of EP0146079A2 publication Critical patent/EP0146079A2/fr
Publication of EP0146079A3 publication Critical patent/EP0146079A3/de
Application granted granted Critical
Publication of EP0146079B1 publication Critical patent/EP0146079B1/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
    • 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
    • C21C5/44—Refractory linings
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Definitions

  • the invention relates to a gas-permeable structure made of refractory material for blowing gases into metal treatment vessels through the lining thereof.
  • the oxygen inflation processes used to fresh iron are improved in such a way that secondary gases, such as nitrogen or argon, are blown in in a controlled manner through the converter base. Blowing of gases into the metal bath through the bottom of the vessel or lining the walls of the vessel can also be considered in the case of oxygen bottom blowing processes and in metal treatment vessels, such as furnace pans, desulfurization pans and the like.
  • the gas-permeable structures to be inserted into the lining of the vessel are required to have a durability which corresponds to that of the other refractory lining, since it is difficult to replace worn-out blow-through stones when hot.
  • 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 has been switched on again, the structures should be permeable to gas in an unchanged manner.
  • the gas permeability of the structure over its service life i.e. over an entire kiln trip, remain essentially the same.
  • this structure is provided with a longitudinal metal housing, a free inner end face and a distribution space for gas supply on the outer end face and has local interruptions in the interior for the gas passage between the end faces, which are provided with metal inserts.
  • This structure can consist of segments or strips of refractory material and metal inserts in the form of steel sheets in an alternating arrangement.
  • these metal inserts can be flat, corrugated, tubular or wire-shaped and have a small wall thickness.
  • the gas passes through the narrow gaps that remain free between the refractory material and the metal inserts.
  • the refractory material is subjected to the gas pressure, which has a number of disadvantages.
  • the metal casing surrounding the refractory material In order to prevent the metal casing surrounding the refractory material from inflating to the side and gas escaping from the side into the surrounding masonry, which could lead to its premature wear, the metal casing made of sheet steel with a relatively thick wall must be made with gas-tight weld seams.
  • a mortar layer must be arranged between the refractory material and the metal housing, which layer is difficult to apply.
  • a device for blowing purge gas through the bottom or the wall of a converter for metal freshening consisting of a distribution chamber attached to the outer surface of the converter jacket and provided with a gas supply, from which several cylindrical nozzle pipes extend, that pass through the converter jacket, the permanent lining and the wear lining and extend to the inner surface of the lining.
  • These nozzle pipes are flattened in the area of the wear chuck by compressing them to a maximum internal width of 1 mm and are expediently embedded in corresponding recesses in the wear chucks.
  • installing and renewing such a blowing device is complex and time-consuming, and at best it only appears to be economically feasible for small converters.
  • EP-A-70.197 discloses structures for blowing gases into a steel converter, in which nozzle pipes are connected to a distributor in such a way that exposure to gas from the surrounding refractory material is avoided.
  • the nozzle tubes can take a slot-like shape.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide a blowing device in the form of a gas-permeable refractory structure in which a compression of the gas-conducting metallic channels is avoided.
  • the ducts can be compressed, which hinders the passage of gas. This phenomenon cannot be prevented with certainty even by inserting wires into the channels, as is already provided in EP-A-64 449.
  • a jacket made of refractory material can consist of ceramic fibers, for example asbestos or cerafelt fibers. It is essential that the material used is both temperature-resistant and, given the different temperatures prevailing in the structure, has properties which ensure that the strains occurring in the structure are absorbed.
  • the layer thickness does not exceed a maximum value (approx. 1 mm), since otherwise steel infiltration can occur.
  • FIG. 1 shows a for use in a converter bottom g EEI gneter Blasstein in view and in Fig. 2 in top view the upper or inner end surface in Fig.. 3 shows on a larger scale a longitudinal section through the lower or outer part of this blow stone
  • FIG. 4 shows a cross section along line IV-IV of FIG. 3 and FIG. 5
  • FIG. 6 shows the detail “A” of FIG. 4 in two different embodiments on a further enlarged scale, only FIG. 6 showing the jacket (7) made of refractory material which is essential to the invention.
  • Fig. 7 a sink suitable for use in a pan bottom is shown in longitudinal section and in Fig. 8 in a top layer on the upper or inner end face.
  • FIG. 9 shows the top view of the upper or inner end face of another embodiment of the sink block according to FIG. 7.
  • the blow stone shown in FIGS. 1 to 6 is suitable for use in a converter base.
  • the refractory material is exposed on its upper end face 11, which faces the interior of the converter when installed.
  • On the opposite end face 12 there is a gas distribution space 13 which extends over the entire end face 12 and which is delimited by an inner sheet metal plate 14 lying against the refractory material, narrow lateral sheet metal strips 15 and an outer base plate 16.
  • a tubular gas supply 3 is attached.
  • the four side surfaces of the blowing stone 1 are covered by a metal housing 17.
  • the refractory material of the blow stone 1 consists of three prefabricated sections or segments 18, 19 which are held together by the metal housing 17. Two of these segments, namely the two segments 18, are provided on a larger longitudinal side surface with four flat grooves 4 each, which run from the outer and lower end surface 12 of the refractory material to the inner or upper end surface 11 and thus extend over the entire length of the refractory Stretch material.
  • the grooves 4 can be formed in the segments 18 during their manufacture by appropriate design of the die or they can z. B. can be incorporated by milling, planing or cutting.
  • narrow metallic channels 5 are inserted, which are gas-tight on the sides.
  • These channels 5 are preferably made of sheet steel or copper and have a wall thickness of, for example, about 0.5 to 1 mm and an inside width of the order of 0.3 to 1 mm.
  • the channels 5 are inserted into corresponding openings in the inner plate 14 of the gas distribution space 13 and with the plate 14 z.
  • Compliance with the channel width in the order of magnitude of 0.3 to 1 mm ensures that, on the one hand, the required amount of gas can be conveyed through the channels 5 into the metal bath and that, on the other hand, if the gas supply is switched off temporarily, there is no permanent injury to the channels due to penetration Metal melt comes, but that the channels can be blown free after switching on the gas supply.
  • the channels 5 can be provided with known inserts of one or more metal wires 6, as shown in FIG. 5.
  • the measure according to the invention for preventing the ducts from being compressed as a result of the thermal expansion of the refractory material is to coat the ducts 5 on their outside with a compressible refractory fibrous material 7, preferably to wrap them around, as is illustrated in FIG. 6. Due to its compressibility, the fibrous material 7 can absorb the thermal expansion of the refractory material, so that there is no compression of the channels 5.
  • FIG. 7 to 9 show a sink 2 suitable for use in a pan bottom. It has the shape of a truncated cone, which, in cooperation with a known perforated brick with a truncated cone-shaped opening, makes it easy to replace this sink.
  • a smaller end face 21 which is installed against the inside of the pan the refractory material is exposed.
  • the refractory material has a frustoconical central recess 20, in which a gas distribution space 23 is arranged.
  • the refractory material of the sink 2 can consist of refractory mass.
  • the metal structure consisting of the channels 5, the gas distribution space 23, the base plate 26 and the metal housing 27 is first produced and its free space is filled with a refractory casting or ramming mass, so that a refractory mass body 28 is formed in which the channels are embedded. Since not only the subsequent thermal expansion of the refractory material acts on the channels 5, but also the compression pressure for the refractory mass, the risk of compression is particularly great here. Therefore, in this case, the embodiment according to FIG. 6, ie. H. coating, e.g. B. wrapping with a compressible refractory fiber 7th
  • the refractory material of the sink 2 can also consist of several prefabricated segments. According to FIG. 9, there are two such segments 29 in the form of half truncated cones, which are provided with slots or grooves 4 ′, which complement one another in pairs, for receiving the channels 5.
  • the gas distribution space 23 of the sink 2 could extend over the entire outer end face 22, or the gas distribution space 13 of the blow stone 1 could be limited to a central area arranged in a recess in the refractory material.
  • the refractory material of the structure according to the invention can consist, for example, of sintered or melted magnesia, of a mixture of magnesia or chrome ore, of pre-reacted magnesia chrome ore sintered or melted material or of high alumina material. Enrichment of the refractory material with a carbon carrier is also possible.
  • the material can be used in the form of baked segments or it can be chemically bonded, pitch bonded or resin bonded. Subsequent impregnation of the prefabricated burned or bonded segments with a carbon carrier, such as tar, pitch or synthetic resin, is also possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Soft Magnetic Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Ceramic Products (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
  • Glass Compositions (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Resistance Heating (AREA)

Claims (10)

1. Pièce en matière réfractaire (1, 2) perméable aux gaz pour l'insufflation de gaz dans des récipients de traitement métallurgiques à travers le revêtement de ceux-ci, ladite pièce étant constituée par un manteau métallique latéral (17, 27), une surface frontale intérieure libre (11, 21) et une chambre de distribution (13, 23) pour l'amenée du gaz à la surface frontale extérieure (12, 22), l'intérieur de la pièce comprenant pour le passage du gaz au moins une discontinuité locale s'étendant entre les surfaces frontales et renfermant un étroit canal métallique (5) fermé latéralement, la chambre de distribution de gaz (13, 23) étant isolée du matériau réfractaire par une plaque frontale (14, 24) à laquelle sont fixés de façon étanche les canaux (5), caractérisée en ce que le canal métallique (5) est revêtu sur sa surface extérieure avec un manteau (7) en matière réfractaire à propriétés élastiques qui garantissent une neutralisation des dilatations engendrées dans la pièce.
2. Pièce selon la revendication 1, caractérisée en ce qu'à des températures supérieures à 1 000 °C le manteau subit un frittage partiel, ce dont il résulte une diminution de son volume.
3. Pièce selon une des revendications 1 à 2, caractérisée en ce que le manteau est constitué essentiellement de fibres céramiques.
4. Pièce selon une des revendications 1 à 3, caractérisée en ce que le manteau est constitué d'une natte qui est enroulée autour du canal.
5. Pièce selon une des revendications 1 à 4, caractérisée en ce que l'épaisseur du manteau s'élève à environ 1 mm au maximum.
6. Pièce selon une des revendications 1 à 5, caractérisée en ce que les canaux métalliques (5) sont incorporés dans un corps dammé ou coulé
(28) en matière réfractaire, ce corps formant au moins la partie centrale du matériau réfractaire.
7. Pièce selon une, des revendications 1 à 5, caractérisée en ce que les canaux métalliques (5) sont logés dans des fentes ou des rainures (4, 4') qui sont façonnées dans le corps réfractaire de base ou dans les segments individuels (18, 29).
8. Pièce selon une des revendications 1 à 7, caractérisée en ce que la chambre de distribution de gaz (13, 23) est aménagée dans un évidement central (20) du matériau réfractaire.
9. Pièce selon une des revendications 1 à 8, caractérisée en ce que les canaux sont fabriqués à partir de tôles d'acier ou de cuivre et ont une épaisseur de paroi d'environ 0,5 à 1 mm et une ouverture intérieure d'environ 0,3 à 1 mm.
EP84114799A 1983-12-12 1984-12-05 Pièce réfractaire perméable aux gaz Expired - Lifetime EP0146079B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114799T ATE50797T1 (de) 1983-12-12 1984-12-05 Gasdurchlaessiger baukoerper aus feuerfestem material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU85131 1983-12-12
LU85131A LU85131A1 (de) 1983-12-12 1983-12-12 Gasdurchlaessiger baukoerper aus feuerfestem material

Publications (3)

Publication Number Publication Date
EP0146079A2 EP0146079A2 (fr) 1985-06-26
EP0146079A3 EP0146079A3 (en) 1987-01-07
EP0146079B1 true EP0146079B1 (fr) 1990-03-07

Family

ID=19730188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114799A Expired - Lifetime EP0146079B1 (fr) 1983-12-12 1984-12-05 Pièce réfractaire perméable aux gaz

Country Status (13)

Country Link
US (1) US4647020A (fr)
EP (1) EP0146079B1 (fr)
JP (1) JPS60149709A (fr)
KR (1) KR850004990A (fr)
AT (1) ATE50797T1 (fr)
AU (1) AU566336B2 (fr)
BR (1) BR8406349A (fr)
CA (1) CA1247861A (fr)
DE (1) DE3481527D1 (fr)
ES (1) ES291744Y (fr)
IN (1) IN162802B (fr)
LU (1) LU85131A1 (fr)
ZA (1) ZA849690B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101833A1 (de) * 1991-01-23 1992-08-06 Hoesch Stahl Ag Vorrichtung zum einleiten von liftgas in den ruessel einer vakuumanlage
DE4335643C1 (de) * 1993-10-15 1994-10-27 Mannesmann Ag Verfahren und Vorrichtung zum Einleiten von Gasen in Metallschmelzen
DE4411538C1 (de) * 1994-04-02 1995-12-14 Didier Werke Ag Verfahren zum Herstellen einer Gas- und/oder Feststoffblaseinrichtung für metallurgische Gefäße, sowie nach dem Verfahren hergestellte Blaseinrichtung
DE19542446A1 (de) * 1995-11-14 1997-05-15 Lorenz Doetsch Feuerfeste Formplatten mit Gasführungskanälen

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538498A1 (de) * 1985-10-30 1987-05-07 Didier Werke Ag Einduesvorrichtung fuer metallurgische gefaesse
NL8600608A (nl) * 1986-03-10 1987-10-01 Hoogovens Groep Bv Converter voor het bereiden van staal.
DE3625117C1 (en) * 1986-07-25 1987-11-26 Didier Werke Ag Gas-flushing cone
US4741515A (en) * 1986-10-20 1988-05-03 Bethlehem Steel Corporation Apparatus for introducing gas into a metallurgical vessel
LU86816A1 (fr) * 1987-03-19 1988-11-17 Arbed Dispositif pour vidanger des recipients metallurgiques
DE3734713A1 (de) * 1987-10-14 1989-04-27 Pa Ha Ge Huetten Und Giesserei Spuelstein fuer metallurgische gefaesse
US4836433A (en) * 1988-05-13 1989-06-06 Insul Company, Inc. Device for introducing stirring gas into molten metal in metered amount
US4840356A (en) * 1988-06-13 1989-06-20 Labate Michael D Externally replaceable stirring plug for molten metal vessels
DE4022949C1 (fr) * 1990-07-19 1991-07-11 Radex-Heraklith Industriebeteiligungs Ag, Wien, At
JPH0510443U (ja) * 1991-07-29 1993-02-09 東京窯業株式会社 ガス吹き込み用プラグ
US5249778A (en) * 1992-04-14 1993-10-05 Dolomitwerke Gmbh Gas stir plug device with visual wear indicator
CA2073219C (fr) * 1992-07-06 1995-12-19 Keizo Aramaki Refractaire pour soufflante de cuve d'affinage de metal en fusion
CN110066906A (zh) * 2019-06-06 2019-07-30 洛阳利尔耐火材料有限公司 一种一次成型整体透气砖、成型模具以及成型方法
LU500076B1 (en) * 2021-04-23 2022-10-24 Exus Refractories Spa Gas purging plug for a metallurgical container

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
AT288952B (de) * 1968-12-06 1971-03-25 Veitscher Magnesitwerke Ag Feuerfeste Auskleidung mit Dehnungsausgleich und Verfahren zur Herstellung einer Isoliermasse für solche Auskleidungen
US4238121A (en) * 1977-10-07 1980-12-09 Kawasaki Steel Corporation Hearth structure of an oxygen-bottom-blowing converter
CA1130560A (fr) * 1978-08-28 1982-08-31 Yoshihiro Hayashi Lance et methode d'affinage du metal en fusion
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
CS241483B2 (en) * 1980-06-25 1986-03-13 Arbed Refractory building body
LU82597A1 (de) * 1980-07-09 1982-02-17 Arbed Feuerfester,gasdurchlaessiger baukoerper
FR2504664A1 (fr) * 1981-04-24 1982-10-29 Francais Aciers Speciaux Dispositif de soufflage de gaz de brassage dans un convertisseur d'affinage des metaux
AU544858B2 (en) * 1981-06-03 1985-06-13 Nippon Kokan Kabushiki Kaisha Gas blowing nozzle
AU541441B2 (en) * 1981-07-15 1985-01-10 Nippon Steel Corporation Bottom blowing nozzle embedded in a refractory block
JPS5839719A (ja) * 1981-09-02 1983-03-08 Nippon Steel Corp 炉底ガス吹込ノズルの形成方法
JPS5839720A (ja) * 1981-09-02 1983-03-08 Nippon Steel Corp 底吹き転炉の通気性耐火物保護方法
US4462576A (en) * 1982-02-24 1984-07-31 Didier-Werke Ag Apparatus for supplying gas through the wall of a metallurgical container
AU567023B2 (en) * 1982-03-29 1987-11-05 Nippon Kokan Kabushiki Kaisha Bottom blown gas blowing nozzle for maltev metal refining furnace and steel refining method using the same
JPS58167717A (ja) * 1982-03-29 1983-10-04 Nippon Kokan Kk <Nkk> 溶融金属精錬用ノズル
LU84167A1 (de) * 1982-05-25 1983-11-23 Arbed Feuerfeste,gasdurchlaessige baukoerper
JPS58210112A (ja) * 1982-05-31 1983-12-07 Nippon Steel Corp ガス吹込みノズル
JPS5920418A (ja) * 1982-07-27 1984-02-02 Tokyo Yogyo Co Ltd Ｒｈ脱ガス装置の上昇浸漬管

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101833A1 (de) * 1991-01-23 1992-08-06 Hoesch Stahl Ag Vorrichtung zum einleiten von liftgas in den ruessel einer vakuumanlage
DE4335643C1 (de) * 1993-10-15 1994-10-27 Mannesmann Ag Verfahren und Vorrichtung zum Einleiten von Gasen in Metallschmelzen
DE4411538C1 (de) * 1994-04-02 1995-12-14 Didier Werke Ag Verfahren zum Herstellen einer Gas- und/oder Feststoffblaseinrichtung für metallurgische Gefäße, sowie nach dem Verfahren hergestellte Blaseinrichtung
DE19542446A1 (de) * 1995-11-14 1997-05-15 Lorenz Doetsch Feuerfeste Formplatten mit Gasführungskanälen
DE19542446C2 (de) * 1995-11-14 1998-05-28 Doetsch Geb Richard Marie Luis Feuerfeste Formplatten mit Gasführungskanälen

Also Published As

Publication number Publication date
ZA849690B (en) 1985-07-31
DE3481527D1 (de) 1990-04-12
ATE50797T1 (de) 1990-03-15
US4647020A (en) 1987-03-03
BR8406349A (pt) 1985-10-08
IN162802B (fr) 1988-07-09
LU85131A1 (de) 1985-09-12
EP0146079A3 (en) 1987-01-07
AU566336B2 (en) 1987-10-15
ES291744Y (es) 1987-03-01
JPS60149709A (ja) 1985-08-07
KR850004990A (ko) 1985-08-19
ES291744U (es) 1986-05-01
EP0146079A2 (fr) 1985-06-26
CA1247861A (fr) 1989-01-03
AU3645584A (en) 1986-06-19

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