EP0362475A2 - Brique pour rinçage au gaz - Google Patents

Brique pour rinçage au gaz Download PDF

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Publication number
EP0362475A2
EP0362475A2 EP89110933A EP89110933A EP0362475A2 EP 0362475 A2 EP0362475 A2 EP 0362475A2 EP 89110933 A EP89110933 A EP 89110933A EP 89110933 A EP89110933 A EP 89110933A EP 0362475 A2 EP0362475 A2 EP 0362475A2
Authority
EP
European Patent Office
Prior art keywords
gas
securing part
purging plug
plug according
securing
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.)
Withdrawn
Application number
EP89110933A
Other languages
German (de)
English (en)
Other versions
EP0362475A3 (fr
Inventor
Hans Rothfuss
Raimund Brückner
Manfred Winkelmann
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0362475A2 publication Critical patent/EP0362475A2/fr
Publication of EP0362475A3 publication Critical patent/EP0362475A3/fr
Withdrawn legal-status Critical Current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
    • C21C5/46—Details or accessories
    • 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 a metallurgical melt vessel, which consists of a refractory wear part facing the inside of the vessel with a plurality of gas passage paths and a refractory securing part facing away from the inside of the vessel, to which purging gas can be supplied to the gas passage paths.
  • Such a gas purging plug is described in EP 0 105 868 B1.
  • the wearing part is cemented into a recess in the securing part.
  • a gas supply pipe runs in a spiral in the securing part.
  • Metal melt can enter this in the event of a melt breakthrough. Since the tube is arranged in the - poorly heat-conducting - securing part, in many cases it is not guaranteed that the metal melt entering will freeze. This jeopardizes the necessary security in the event of a melt breakthrough.
  • EP 0 181 853 B1 describes a gas purging plug without a fire-proof securing part.
  • a metal core with a metal helix is arranged in a gas supply pipe.
  • the melt must have broken through into the gas supply pipe before it can be solidified. Solidification of the melt is unsafe, however, if the metal core and the metal coil themselves are at a high temperature.
  • Another disadvantage is that the metal core and the metal helix take up a considerable amount of space.
  • the object of the invention is to propose a gas purging plug of the type mentioned, the safety of which is improved and in which, in the event of a melt breakthrough, the melt solidifies in the gas purging plug even before a gas connection.
  • the above object is achieved in the case of a gas purging plug of the type mentioned at the outset in that the material of the securing part is more thermally conductive than the material of the wearing part and that the gas passage paths also run in the securing part.
  • the high thermal conductivity of the securing part ensures that it quickly extracts heat from the melt when the melt breaks, so that it solidifies. Breakthrough melt can be distributed in the gas passage paths of the safety part. The melt only occurs in fine flow threads, from which heat is extracted by the securing part. The melt that breaks through solidifies in the securing part without getting into a gas connection pipe. It is also favorable that the construction of the gas purging plug is simple despite high security.
  • the increased thermal conductivity of the securing part is achieved by thermally conductive particles. These are embedded in the fireproof material of the safety part. Suitable as thermally conductive particles are, for example, copper chips, SiC particles or graphite flakes, which are oriented in the material of the securing part in such a way that the preferred direction of the heat dissipation is directed outwards.
  • the securing part is made in one piece with the wearing part and consists of the same refractory material as the wearing part.
  • an intermediate layer is formed between the securing part and the wearing part, which is less thermally conductive than the wearing part.
  • the heat transfer from the wearing part to the securing part is reduced, so that it remains colder than the wearing part. This favors the solidification of the melt in the event of a melt breakthrough.
  • the intermediate layer can consist, for example, of a refractory fiber material.
  • a melting body is arranged in the wearing part, on which a plunger extending through the securing part is present, which in the solid state of the melting body is in the gas connection hold the valve in place until the melting body melts.
  • a gas purging plug 1 has a wearing part 2 and a securing part 3 (cf. FIG. 1).
  • the wearing part 2 and the securing part 3 are made together in one piece from a hydraulically or chemically setting, refractory, ceramic mass. So they merge seamlessly.
  • the wearing part 2 contains particles that conduct heat well, such as copper chips.
  • the gas purging plug 1 is constructed in the manner of a labyrinth flusher. However, it could also be constructed as a capillary or disc washer.
  • a large number of gas passage paths 4 run in the gas purging block 1, of which only two can be seen in FIGS. 1 and 2.
  • the gas passage paths 4 extend not only in the wearing part 2, but also in the securing part 3. They open out in the securing part 3 into a gas distribution space 5 which is recessed in this.
  • the gas purging plug 1 is held on a cover part 6.
  • a centering ring 7 is fastened to the cover part 6 by means of screws 8.
  • the centering ring 7 engages around the securing part 3 and has a contact surface 9 which is adapted to the conicity of the conical gas flushing block 1.
  • a cylinder 10 is fastened to the cover part 6, in which a piston 12 loaded with a compression spring 11 is guided.
  • a valve body 13, to which a valve seat 14 is assigned, is fastened to one side of the piston 12.
  • the valve seat 14 is located between the cylinder 10 and a pipe section 15 which has a gas connection 16.
  • a plunger 17 is attached on the other side of the piston 12. This protrudes through the securing part 3 into the wear part 2.
  • a melting body 18 is arranged, on which the plunger 17 is applied under the force of the compression spring 11.
  • the centering ring 7 is in heat-conducting connection with the securing part 3. It thus contributes to heat dissipation.
  • the securing part 3 can also be connected in a heat-conducting manner to a sheet metal base 19 of the vessel in which the gas purging plug 1 is inserted. As a result, the heat dissipation of the securing part 3 is additionally improved.
  • the cylinder 10 is inserted sealingly into the gas distribution space 5.
  • a sleeve 20 is arranged in the gas distribution space 5. This is pressed when the cylinder 10 is inserted into the gas distribution space 5 so that the cylinder 10 sits tightly in the gas distribution space 5.
  • flushing gas is supplied to the cylinder 10 via the gas connecting piece 16. This passes through openings 21 of the piston 12 and flows into the gas passage paths 4.
  • the melting body 18 melts so that it no longer supports the plunger 17.
  • the compression spring 11 now displaces the piston 12 so that the valve body 13 closes the valve seat 14 completely or partially. This creates an increase in pressure in the pipe system of the purge gas supply. This is evaluated to indicate wear.
  • the melt breaks into the wear part 2, for example along the line a, the melt reaches the securing part 3. Because of its high thermal conductivity, heat is removed from the melt very quickly, so that it solidifies.
  • melt that breaks through does not get into the gas distribution space 5 and to the cover part 6.
  • the gas purging plug 1 can be removed from the mounting wall by means of the cover part 6. After removing the centering ring 7, the gas purging plug 1 on the cover part 6 can be exchanged, the cylinder 10 and the plunger 17 remaining on the cover part 6 and being reusable therewith. Otherwise, the plunger 17 can be changed at any time.
  • an intermediate layer 22 is additionally provided. This extends between the wearing part 2 and the securing part 3.
  • the intermediate layer 22 is provided as thermal insulation between the wearing part 2 and the securing part 3. It has a lower thermal conductivity than the wear part 2.
  • the intermediate layer 22 consists, for example, of a ceramic fiber material. It can be made in one piece with the wearing part 2 and the securing part 3.
  • the intermediate layer 22 ensures that the securing part 3 is only slightly heated by the wearing part 2.
  • the wearing part 2 and the securing part 3 are separate components.
  • 4 capillaries are formed as through paths. These lead on the one hand into the pipe section 15 of the cover part 6 and on the other hand into an intermediate space 23 into which the gas passage paths 4 of the wear part 2 open.
  • the wear part 2 consists of a gas-permeable, refractory inner part 24 and a refractory outer part 25 that is impermeable to this gas.
  • the mode of operation of the securing part 3 when the melt breaks through corresponds to the mode of operation described above.
  • the securing part 3 is reusable in this embodiment. After wear, only wear part 2 needs to be replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Thermal Insulation (AREA)
EP19890110933 1988-10-01 1989-06-16 Brique pour rinçage au gaz Withdrawn EP0362475A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833503A DE3833503A1 (de) 1988-10-01 1988-10-01 Gasspuelstein
DE3833503 1988-10-01

Publications (2)

Publication Number Publication Date
EP0362475A2 true EP0362475A2 (fr) 1990-04-11
EP0362475A3 EP0362475A3 (fr) 1990-10-10

Family

ID=6364232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890110933 Withdrawn EP0362475A3 (fr) 1988-10-01 1989-06-16 Brique pour rinçage au gaz

Country Status (7)

Country Link
US (1) US4971295A (fr)
EP (1) EP0362475A3 (fr)
JP (1) JPH02130390A (fr)
KR (1) KR900006522A (fr)
CN (1) CN1014803B (fr)
DE (1) DE3833503A1 (fr)
ZA (1) ZA895422B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5249778A (en) * 1992-04-14 1993-10-05 Dolomitwerke Gmbh Gas stir plug device with visual wear indicator
US5330160A (en) * 1993-05-11 1994-07-19 Martin & Pagenstecher, Inc. Gas stir plug wear indicator including low melting point component and method of use
US5478053A (en) * 1995-04-10 1995-12-26 North American Refractories Co. Inc. Refractory gas purging device
BR9900824A (pt) * 1999-03-01 2000-03-14 Magnesita S A Sistema de injeção de gases em recipientes contendo metais ou ligas fundidas.
RU2243267C1 (ru) * 2003-08-18 2004-12-27 ОАО Челябинский металлургический комбинат "МЕЧЕЛ" Фурма для донной продувки металла газами в ковше и способ ее изготовления
RU2479635C2 (ru) * 2011-05-31 2013-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тульский государственный университет" (ТулГУ) Фурма для донной продувки металла газами в ковше и способ ее изготовления
RS54558B1 (sr) * 2014-01-09 2016-06-30 Refractory Intellectual Property Gmbh & Co. Kg Element za prečišćavanje gasom i odgovarajući element za priključivanje gasa
EP2942406B1 (fr) * 2014-05-05 2016-04-13 Refractory Intellectual Property GmbH & Co. KG Élément de barboteur céramique résistant au feu

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3541604A (en) * 1967-02-01 1970-11-17 Nippon Steel Corp Gas insufflating means for a molten metal refining container
AT376455B (de) * 1982-10-06 1984-11-26 Oesterr Amerikan Magnesit Metallurgischer ofen oder metallurgisches gefaess
DE3240097A1 (de) * 1982-10-29 1984-05-03 Günter Dr.-Ing. 5102 Würselen Sindelar Metallurgisches gefaess
WO1985001068A1 (fr) * 1983-08-20 1985-03-14 Brohltal-Deumag Ag Für Feuerfeste Erzeugnisse; Appareil d'extraction pour une pierre refractaire d'injection de gaz
US4589635A (en) * 1984-05-24 1986-05-20 Pollock Company Porous plug retainer
AT383617B (de) * 1984-09-18 1987-07-27 Oesterr Amerikan Magnesit Gasspuelstein fuer metallurgische oefen und gefaesse
DE3505821C1 (de) * 1985-02-20 1986-08-07 Didier-Werke Ag, 6200 Wiesbaden Huelse zum Einblasen von Feststoffen in eine Metallschmelze
CH665850A5 (de) * 1985-08-09 1988-06-15 Burbach & Bender Ohg Gasspuelstein fuer metallurgische gefaesse.
DE3538498A1 (de) * 1985-10-30 1987-05-07 Didier Werke Ag Einduesvorrichtung fuer metallurgische gefaesse
FR2601694B1 (fr) * 1986-03-28 1990-12-21 Toshin Steel Co Bouchon pour appareil d'affinage
DE3623609C1 (de) * 1986-07-12 1988-01-21 Didier Werke Ag Gasspueleinrichtung
GB8703717D0 (en) * 1987-02-18 1987-03-25 Injectall Ltd Injecting gas into metal melts
DE3716920A1 (de) * 1987-05-20 1988-12-08 Steuler Industriewerke Gmbh Gasspuelsystem mit gasdurchbruchssicherung

Also Published As

Publication number Publication date
CN1041788A (zh) 1990-05-02
KR900006522A (ko) 1990-05-08
DE3833503C2 (fr) 1990-10-04
CN1014803B (zh) 1991-11-20
DE3833503A1 (de) 1990-04-05
EP0362475A3 (fr) 1990-10-10
ZA895422B (en) 1990-05-30
JPH02130390A (ja) 1990-05-18
US4971295A (en) 1990-11-20

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