EP0030501B1 - Elément réfractaire poreux et procédé de fabrication - Google Patents

Elément réfractaire poreux et procédé de fabrication Download PDF

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Publication number
EP0030501B1
EP0030501B1 EP80401719A EP80401719A EP0030501B1 EP 0030501 B1 EP0030501 B1 EP 0030501B1 EP 80401719 A EP80401719 A EP 80401719A EP 80401719 A EP80401719 A EP 80401719A EP 0030501 B1 EP0030501 B1 EP 0030501B1
Authority
EP
European Patent Office
Prior art keywords
refractory
gas
trough
mass
porous
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
EP80401719A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0030501A1 (fr
Inventor
Jean-Claude Grosjean
Roland Grave
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9232679&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0030501(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT80401719T priority Critical patent/ATE5423T1/de
Publication of EP0030501A1 publication Critical patent/EP0030501A1/fr
Application granted granted Critical
Publication of EP0030501B1 publication Critical patent/EP0030501B1/fr
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
    • C21C5/42—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 present invention relates to porous refractory elements intended to be traversed by a gaseous fluid under pressure.
  • a metal casing for example a thin steel sheet, which is closed at one of its ends by a base plate provided with supply means. blowing gas.
  • the envelope and the plate define a receptacle in which the porous mass only appears by a single free face, which is intended to be brought into contact with the molten metal.
  • the inventors have found that, under the influence of repetitive blowing sequences, the envelope sometimes ends up exhibiting permanent deformation, so that in the absence of blowing, molten metal entered the. spaces thus formed between the envelope and the porous mass.
  • the invention relates to a porous refractory element intended to be traversed by a gaseous fluid under pressure and comprising a porous refractory mass placed in a metal receptacle constituted by a lateral envelope and a base plate provided with means gas supply, characterized in that the receptacle internally comprises a deflector secured to the base plate and the walls of which parallel to the lateral envelope extend over a height less than that of said envelope.
  • the deflector consists of a simple metallic ferrule.
  • the refractory mass is composed of a porous central part surrounded by a peripheral layer of compact refractory concrete, the deflector taking position between this central part and the peripheral layer.
  • the subject of the invention is also a method of manufacturing the porous refractory element, according to which the metal receptacle constitutes the shell for molding the refractory mass, a method characterized in that it consists in taking an asymmetrical U-shaped metal gutter whose large branch, arranged externally, constitutes the lateral envelope and the small branch constitutes the deflector, to fill this gutter with a compact refractory concrete so as to obtain a sealed peripheral layer, to invert the assembly obtained and to place it on a temporary support surface, then filling the remaining central cavity with porous refractory concrete and finally closing the filling orifice with a plate fitted with gas supply means and fixed in leaktight manner to the base of the gutter.
  • the present invention therefore basically consists in discharging the metal envelope from its lateral gas-tightness function by replacing, for this purpose, an internal deflector surrounded at a distance by said envelope. Fixing the deflector on the base plate allows it, moreover, to constitute a stop against the infiltrations of molten metal which take place between the envelope and the porous mass and to prevent these from coming to obstruct the means for supplying the blowing gas.
  • the deflector only partially replaces the casing in its role of lateral gas tightness.
  • the deflector can in fact only constitute a baffle having a reduced height compared to that of the envelope. It is understood that, in the opposite case, that is to say if the deflector extended from the base plate to the free surface of the porous mass, we would otherwise be in a situation analogous to that known described previously with the drawbacks which the present invention seeks to remedy precisely.
  • the element shown in the figures is constituted by a refractory mass 1 housed in a metal receptacle 2, so as to reveal only a free surface 3.
  • This free surface 3 is intended to be brought into contact with the molten metal when the element is incorporated into the refractory lining of a metallurgical container.
  • the refractory mass 1 is made up of two parts, one inside the other: a core 4 made of porous refractory material, permeable to gas, and a peripheral layer 5, about 2 cm thick, surrounding the core 4 and made of a compact refractory concrete, of very fine particle size, so as to be as impermeable to gases as possible.
  • the metal receptacle 2 made of 1.5 mm thick sheet steel, is composed of a lateral envelope 6, a base of which is closed by a bottom 7 provided in the middle with a pipe 8 for the introduction of the blowing gas.
  • the envelope 6 has a regular converging profile from the bottom 7 to the level of the free surface 3, that is to say in the direction of blowing of the gas. This is a classic arrangement, giving the element a shape in the form of a pyramid with a rectangular or square base.
  • this particular form which is not limitative of the invention makes it possible, on the one hand, to facilitate the insertion without play of the element in the orifice of the refractory lining intended to receive it and, on the other hand, once the element is in place, ensure the blocking of the refractory mass 1 which otherwise risks being ejected into the molten metal, under the effect of the pressurized gas blown through the pipe 8.
  • the element has internally a deflector 11 surrounded at a distance by the casing 6 and secured to the bottom 7 in a sealed manner over its entire perimeter.
  • this deflector is constituted by a metal partition parallel to the casing 6 but necessarily extending over a height less than that of the latter. More precise information on the optimal height of the deflector is given below.
  • the deflector 11 is not attached to the bottom 7 but constitutes the small branch of an asymmetrical U-shaped section whose casing 6 represents the other branch and whose the base, referenced 12, delimits the periphery of the bottom 7, the central part of the latter being constituted by a flange 13 sealingly attached to the base 12 by means of a weld bead 14.
  • the deflector 11 is disposed in the element, so as to take place in the junction zone between the porous core 4 and the compact layer 5.
  • the element to be made from the structure which has just been described is intended to replace a brick usual refractory constituting the bottom of a steelworks pocket or refining converter. It is clear, under these conditions, that this structure will advantageously have a size identical to or very slightly lower than that of the brick to be replaced, the formats of which are moreover standardized.
  • the bottom bricks of a conventional converter having a capacity of the order of 20 t. usually have the following approximate format: 60 cm high for a length and a width of 16 and 14 cm respectively at their base.
  • the filling end is closed off by means of a metal flange 13 sealingly attached to the base 12 of the gutter and carrying the pipe 8 for supplying the blowing gas.
  • the sealed assembly between the flange 13 and the base 12 is produced by a weld bead 14.
  • the element thus produced is then removed from the support surface and after drying and gentle cooking, is ready for use.
  • the deflector 11 constitutes with respect to the gas passing through the porous mass 4 a baffle which channels it towards the free surface 3 by preventing it from dispersing laterally towards the envelope 6.
  • the compact concrete layer 5 may be capable, by itself, of ensuring the channeling of the gas.
  • the invention is not limited to this embodiment, but extends to the case where the entire refractory mass 1 is permeable to gas and, in this case, only the baffle 11 ensures the gas pipeline.
  • the deflector 11 extends over the entire height of the refractory mass 1, that is to say over a height equal to that of the outer casing 6 so as to channel the gas up to the free surface 3.
  • the optimum height for the deflector is substantially equal to the remaining height of the entire element, when it is replaced after wear. This optimal height is of the order of approximately 15 cm in the case where the metallurgical container for which the permeable element according to the invention is intended is a converter for refining cast iron into steel.
  • the present invention cannot be limited to the example described, but extends to any other embodiment of the deflector in the hovel where it constitutes, with respect to metal infiltration, a stop and with respect to the blowing gas passing through the porous refractory material, a baffle or, more generally, a member with a very high pressure drop preventing or at least greatly reducing the lateral dispersion of the gas up to the outer envelope.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Magnetic Heads (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Continuous Casting (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtering Materials (AREA)
EP80401719A 1979-12-10 1980-12-02 Elément réfractaire poreux et procédé de fabrication Expired EP0030501B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401719T ATE5423T1 (de) 1979-12-10 1980-12-02 Poroeses feuerfestes element und verfahren zur herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7930425A FR2471416A1 (fr) 1979-12-10 1979-12-10 Elements refractaires poreux et procede de fabrication
FR7930425 1979-12-10

Publications (2)

Publication Number Publication Date
EP0030501A1 EP0030501A1 (fr) 1981-06-17
EP0030501B1 true EP0030501B1 (fr) 1983-11-23

Family

ID=9232679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401719A Expired EP0030501B1 (fr) 1979-12-10 1980-12-02 Elément réfractaire poreux et procédé de fabrication

Country Status (8)

Country Link
US (1) US4348013A (enrdf_load_stackoverflow)
EP (1) EP0030501B1 (enrdf_load_stackoverflow)
JP (1) JPS5694182A (enrdf_load_stackoverflow)
AT (1) ATE5423T1 (enrdf_load_stackoverflow)
AU (1) AU536650B2 (enrdf_load_stackoverflow)
CA (1) CA1160215A (enrdf_load_stackoverflow)
DE (1) DE3065727D1 (enrdf_load_stackoverflow)
FR (1) FR2471416A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL189008C (nl) * 1981-11-18 1992-12-01 Hoogovens Groep Bv Gasdoorlatend wandelement voor een met vuurvast materiaal bekleed metallurgisch vat, in het bijzonder voor een l.d.-staalconverter.
FR2516938B1 (fr) * 1981-11-23 1986-06-06 Usinor Dispositif pour l'introduction de gaz dans le bain de metal liquide
JPS59150656A (ja) * 1983-02-16 1984-08-28 Toshiba Ceramics Co Ltd スライデイングノズル装置
DE3503222C2 (de) * 1985-01-31 1987-02-12 Didier-Werke Ag, 6200 Wiesbaden Gasspülkegel
JPH0613254Y2 (ja) * 1988-08-03 1994-04-06 川崎炉材株式会社 溶融金属撹拌装置
DE4219615C2 (de) * 1992-06-16 1994-05-19 Burbach & Bender Ohg Gasspülstein für metallurgische Gefäße
CN109141016B (zh) * 2018-06-01 2019-08-16 福建麦特新铝业科技有限公司 一种用于熔炼炉炉底通气搅拌的透气塞及金属熔炼炉
JP7319563B2 (ja) * 2021-12-21 2023-08-02 品川リフラクトリーズ株式会社 羽口部材、および、溶融金属精錬容器の底部に羽口を設置する方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811346A (en) * 1952-01-21 1957-10-29 L Air Liquide Sa Pour L Etudes Device for insufflating gas into a mass of molten metal
FR1162727A (fr) * 1956-10-26 1958-09-16 Siderurgie Fse Inst Rech Procédé pour obtenir des pièces en béton poreux assurant l'insufflation dirigée d'un fluide et produits obtenus au moyen de ce procédé
DE2633054B1 (de) * 1976-06-01 1977-09-15 Alusuisse Vorrichtung zur Einleitung von Gasen in Fluessigkeiten enthaltende Reaktionsgefaesse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU30391A1 (enrdf_load_stackoverflow) * 1949-11-03
FR1031504A (fr) * 1957-09-09 1953-06-24 Air Liquide Dispositif d'insufflation de gaz dans une masse de métal fondu
US3633898A (en) * 1969-06-06 1972-01-11 Stora Kopparbergs Bergslags Ab Means for gas-flushing metal melts
US3610602A (en) * 1969-10-14 1971-10-05 United States Steel Corp Gas-permeable refractory plug and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811346A (en) * 1952-01-21 1957-10-29 L Air Liquide Sa Pour L Etudes Device for insufflating gas into a mass of molten metal
FR1162727A (fr) * 1956-10-26 1958-09-16 Siderurgie Fse Inst Rech Procédé pour obtenir des pièces en béton poreux assurant l'insufflation dirigée d'un fluide et produits obtenus au moyen de ce procédé
DE2633054B1 (de) * 1976-06-01 1977-09-15 Alusuisse Vorrichtung zur Einleitung von Gasen in Fluessigkeiten enthaltende Reaktionsgefaesse

Also Published As

Publication number Publication date
AU536650B2 (en) 1984-05-17
FR2471416A1 (fr) 1981-06-19
FR2471416B1 (enrdf_load_stackoverflow) 1985-03-22
JPS5694182A (en) 1981-07-30
EP0030501A1 (fr) 1981-06-17
US4348013A (en) 1982-09-07
ATE5423T1 (de) 1983-12-15
AU6499680A (en) 1981-06-18
DE3065727D1 (en) 1983-12-29
CA1160215A (fr) 1984-01-10

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