EP0148336B1 - Brique pour lavage au gaz pour récipients métallurgiques - Google Patents

Brique pour lavage au gaz pour récipients métallurgiques Download PDF

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Publication number
EP0148336B1
EP0148336B1 EP84112403A EP84112403A EP0148336B1 EP 0148336 B1 EP0148336 B1 EP 0148336B1 EP 84112403 A EP84112403 A EP 84112403A EP 84112403 A EP84112403 A EP 84112403A EP 0148336 B1 EP0148336 B1 EP 0148336B1
Authority
EP
European Patent Office
Prior art keywords
gas
brick
collecting chamber
annular collecting
shaped brick
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
EP84112403A
Other languages
German (de)
English (en)
Other versions
EP0148336A1 (fr
Inventor
Hans Dipl.-Ing. Höffgen
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.)
Radex Deutschland AG fur Feuerfes
Original Assignee
RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE
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 RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE filed Critical RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE
Priority to AT84112403T priority Critical patent/ATE29044T1/de
Publication of EP0148336A1 publication Critical patent/EP0148336A1/fr
Application granted granted Critical
Publication of EP0148336B1 publication Critical patent/EP0148336B1/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

Definitions

  • the invention relates to a gas purging plug for metallurgical vessels, consisting of a gas-permeable molded block with directed porosity, which can be inserted into the wall or the bottom of the container, which is formed in an annular region of the molded block, and a gas-tight sheet metal casing partially surrounding the molded block, which consists of a lateral circumferential surface of the molded sheet metal jacket and a sheet metal cover covering the outer end face of the molded block is welded together, and a gas supply pipe which is welded to the edge of a central gas inlet opening of the sheet metal cover.
  • Gas flushing blocks are known from the Radex Rundschau, Issue 3, September 1983, Radenthein, which are provided with a directional porosity in a uniform distribution over their entire cross-section.
  • the purging gas penetrates radially outwards through the gap between the outer end face of the shaped block and the sheet metal base and then flows upwards through the pores in accordance with the principle of least constraint and reaches the melt.
  • the individual bores are subjected to the purging gas unevenly, so that the purging stone cannot be optimally used.
  • the object of the invention is to design a gas purging plug in such a way that, in particular, the ring region provided with directed porosity is optimally used for the gas passage.
  • this object is achieved in that an annular collecting space is provided in front of the entry cross section of the ring area with directed porosity, that the connection area of the central gas supply pipe is connected to the annular collecting space via at least one connecting channel running parallel to the outer end face of the shaped block, and in that the connecting channel opens diagonally into the annular collecting space.
  • the construction according to the invention ensures that a uniform pressure distribution is reliably established in front of the entire ring area, which is provided with the directional porosity, so that a uniform flow through the sink is achieved due to the uniform pressure conditions.
  • the tangential flow component generates a rotating gas flow in the annular collecting space, which accelerates the setting of the uniform pressure distribution.
  • the connecting channel is expediently designed in a spiral.
  • a plurality of connecting channels are preferably distributed at uniform intervals over the circumference, all connecting channels opening obliquely into the collecting space at the same angle.
  • the gas inlet opening can be surrounded by a circular inlet space, the connecting channels extending from the inlet space to the annular collecting space.
  • the expanded entry space ensures that all connecting channels distributed over the circumference are acted upon uniformly.
  • the annular collecting space, the entry space and the connecting channels are preferably formed by beaded bulges of the sheet metal cover.
  • This design measure makes it very easy to manufacture all cavities and channels. They can be formed in the lid of the sheet metal casing in a single operation. In addition, this has the advantage for the sheet metal lid that its rigidity is increased considerably, so that it does not suffer any unwanted deformation even when exposed to high purge gas pressures. This ensures that the flow is always smooth and optimal.
  • the gas purging plug 1 essentially consists of a molded block 2 made of porous, refractory material, a sheet metal casing 3 which partially surrounds the molded block 2, and a gas supply pipe 4.
  • the shaped block 2 is frustoconical, the larger end face 5 of the shaped block 2, which in the installed state of the gas flushing block faces the outside of the metallurgical vessel, is the entry side for the flushing gas.
  • a directional porosity is formed in a concentric ring region 6 of the shaped block 2 and consists of a plurality of bores 7 with very small diameters.
  • the shaped block 2 is surrounded on its circumferential surface with a sheet metal jacket 8, while the outer end face 5 of the shaped block is covered with a sheet metal cover 9.
  • the metal cover 9 lies against the outer end face 5 of the shaped block 2 and extends to the outermost edge of the end face 5.
  • the edge of the sheet metal jacket 8 is flanged over the sheet metal cover 9 and connected to it in a gas-tight manner via a circumferential weld seam 10.
  • the sheet metal cover 9 has a gas inlet opening 11, which carries a cylindrical edge projecting in the axial direction.
  • the gas supply pipe 4 is gas-tightly connected to the gas inlet opening 11, the end of the gas supply pipe 4 being positively inserted into the gas inlet opening 11 and connected to the edge 12 in a gas-tight manner via a circumferential weld seam 13.
  • a circular inlet space 14 which is stamped into the sheet metal cover 9. Furthermore, a circumferential, bead-shaped bulge 15 is incorporated into the sheet metal cover, which creates a collecting space 16 between the end face 5 of the shaped block 5 and the cover material, which runs directly in front of the entry cross section of the ring region 6 with directed porosity.
  • the entry space 14 and the collection space 16 are connected to one another via six spiral-arm connecting channels 17.
  • the connecting channels 17 are formed in the same way as the entry space 14 and the collecting space 16 by bead-shaped bulges 18.
  • the six spiral-arm connecting channels 17 are arranged at uniform intervals over the circumference and have the same sense of direction.
  • the sheet metal cover 9 can be produced with all of its bead-shaped bulges in a single operation.
  • the beads give the sheet metal cover 9 very good stability and can therefore withstand considerable pressures without deforming. Also, there is no warping of the cover when the weld seams 10 and 13 are attached.
  • the purging gas entering the inlet space 14 through the gas supply pipe 4 is distributed uniformly over the six connecting channels 17 and from there reaches the collecting space 16. Since the purging gas flows obliquely into the collecting space 16 with a strong tangential component. a circulating gas flow is generated in the collecting space, so that a uniform pressure distribution is achieved with directed porosity in front of the entire inlet cross section of the ring region 6. This ensures that the gas purging plug is flowed through evenly over its circumference.
  • the connecting channels 17 are only about one to two millimeters high.
  • the width of the connecting channels 17 is approximately five to six millimeters.
  • the inlet space surrounding the gas inlet opening, the annular collecting space and the channels connecting the two spaces are formed by recesses on the outer end face of the shaped block.
  • the sheet metal cover can be completely flat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (5)

1. Brique de balayage par gaz pour des récipients métallurgiques, se composant d'une brique moulée (2) perméable aux gaz qui peut être insérée dans la paroi ou dans le fond du récipient et qui présente une porosité orientée, créée dans une région annulaire (6) de la brique moulée (2), d'une enveloppe de tôle (3) étanche aux gaz, qui entoure partiellement la brique moulée (2) et qui est formée par soudage d'une carcasse en tôle (8) s'étendant autour de la surface périphérique latérale de la brique moulée (2) et d'un couvercle en tôle (9) qui recouvre la surface frontale externe de la brique moulée (2), ainsi que d'un tuyau d'arrivée de gaz (4) qui est soudé au bord d'une ouverture d'entrée de gaz (11) formée au milieu du couvercle en tôle (9), caractérisée en ce qu'il est prévu un espace collecteur annulaire (16) devant la section d'entrée de la région annulaire (6) de porosité orientée, en ce que la région de raccordement du tuyau central d'arrivée de (4) gaz est en communication avec l'espace collecteur annulaire (16) par au moins un canal de jonction (17) qui s'étend parallèlement à la surface frontale externe (5) de la brique moulée (2), et en ce que le canal de jonction (17) débouche obliquement dans l'espace collecteur annulaire (16).
2. Brique de balayage par gaz selon la revendication 1, caractérisée en ce que le canal de jonction (17) est réalisé en forme de spirale.
3. Brique de balayage par gaz selon la revendication 1 ou 2, caractérisée en ce que plusieurs canaux de jonction sont répartis uniformément à distances régulières sur la circonférence, ces canaux débouchant obliquement, sous le même angle, dans l'espace collecteur annulaire (16).
4. Brique de balayage par gaz selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'ouverture d'entrée du gaz (11) du couvercle en tôle (9) est entourée par un espace d'entrée circulaire (14) et en ce que les canaux de jonction (17) s'étendent entre l'espace d'entrée (14) et l'espace collecteur annulaire (16).
5. Brique de balayage par gaz selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'espace collecteur annulaire (16), l'espace d'entrée (14), ainsi que les canaux de jonction (17) sont formés par des parties bombées en forme de moulure du couvercle en tôle (9).
EP84112403A 1983-11-17 1984-10-15 Brique pour lavage au gaz pour récipients métallurgiques Expired EP0148336B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112403T ATE29044T1 (de) 1983-11-17 1984-10-15 Gasspuelstein fuer metallurgische gefaesse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341491A DE3341491C1 (de) 1983-11-17 1983-11-17 Gasspuelstein fuer metallurgische Gefaesse
DE3341491 1983-11-17

Publications (2)

Publication Number Publication Date
EP0148336A1 EP0148336A1 (fr) 1985-07-17
EP0148336B1 true EP0148336B1 (fr) 1987-08-19

Family

ID=6214506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112403A Expired EP0148336B1 (fr) 1983-11-17 1984-10-15 Brique pour lavage au gaz pour récipients métallurgiques

Country Status (6)

Country Link
US (1) US4560149A (fr)
EP (1) EP0148336B1 (fr)
JP (1) JPS60116712A (fr)
AT (1) ATE29044T1 (fr)
CA (1) CA1230479A (fr)
DE (2) DE3341491C1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527793A1 (de) * 1985-08-02 1987-02-12 Esb Schweissbetrieb Burbach & Verfahren zur montage eines fuer metallurgische gefaesse vorgesehenen gasspuelsteins
CH666491A5 (de) * 1985-09-04 1988-07-29 Burbach & Bender Ohg Gasspuelstein fuer metallurgische gefaesse.
AT384623B (de) * 1985-12-23 1987-12-10 Tosin Albert Spuelstein fuer metallurgische gefaesse
US4705563A (en) * 1986-10-23 1987-11-10 The United States Of America As Represented By The United States Department Of Energy Methods and apparatus for reducing corrosion in refractory linings
AT388936B (de) * 1988-04-13 1989-09-25 Veitscher Magnesitwerke Ag Feuerfester, gasdurchlaessiger spuelstein
US4938461A (en) * 1989-06-02 1990-07-03 Zedmark Refractories Corp. Device for distributing gas into molten metal
US5104097A (en) * 1990-09-14 1992-04-14 Martin & Pagenstecher Gmbha Gas stir plugs with slots and method of making the same
US5249778A (en) * 1992-04-14 1993-10-05 Dolomitwerke Gmbh Gas stir plug device with visual wear indicator
JP7199261B2 (ja) * 2019-03-13 2023-01-05 Ｊｆｅ建材株式会社 落石防護装置及び連結具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA849446A (en) * 1970-08-18 Centre National De Recherches Metallurgiques Method and device for treating liquid metal in the ladle
BE635868A (fr) * 1962-08-07
DE2719829A1 (de) * 1977-05-04 1978-11-09 Georg Gail Gasspuelstein fuer pfannen, oefen etc.
GB1594631A (en) * 1978-04-06 1981-08-05 Electricity Council Injectors for injecting gas into molten metal
DE8129091U1 (de) * 1981-10-05 1983-01-27 Sindelar, Günter, Dr.-Ing., 5102 Würselen "metallurgisches gefaess"
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.
AT376455B (de) * 1982-10-06 1984-11-26 Oesterr Amerikan Magnesit Metallurgischer ofen oder metallurgisches gefaess

Also Published As

Publication number Publication date
JPH0140886B2 (fr) 1989-09-01
DE3341491C1 (de) 1985-07-11
EP0148336A1 (fr) 1985-07-17
US4560149A (en) 1985-12-24
ATE29044T1 (de) 1987-09-15
CA1230479A (fr) 1987-12-22
JPS60116712A (ja) 1985-06-24
DE3465497D1 (en) 1987-09-24

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