EP0337982A1 - Brique de brassage réfractaire et perméable aux gaz - Google Patents

Brique de brassage réfractaire et perméable aux gaz Download PDF

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Publication number
EP0337982A1
EP0337982A1 EP89890107A EP89890107A EP0337982A1 EP 0337982 A1 EP0337982 A1 EP 0337982A1 EP 89890107 A EP89890107 A EP 89890107A EP 89890107 A EP89890107 A EP 89890107A EP 0337982 A1 EP0337982 A1 EP 0337982A1
Authority
EP
European Patent Office
Prior art keywords
measuring probe
tube
wire
stone
tip
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.)
Ceased
Application number
EP89890107A
Other languages
German (de)
English (en)
Inventor
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.)
Veitscher Magnesitwerke AG
Original Assignee
Veitscher Magnesitwerke 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 Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of EP0337982A1 publication Critical patent/EP0337982A1/fr
Ceased 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
    • 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
    • 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 refractory, gas-permeable sink for a vessel for holding molten metal with at least one measuring probe for indicating the residual stone thickness, the tip of the measuring probe being arranged at a preselected distance from the cold stone end.
  • the gas purging stones can either contain a refractory stone body of high porosity, in which case the gas passage takes place through the open pores between the refractory grains, or they contain a little or non-porous refractory stone body in which slots or channels are formed through which the gas passage takes place . In the latter case, one speaks of gas purging stones with directed porosity.
  • the gas purging stones are generally subject to more rapid wear than the refractory lining that follows on the side. Although efforts are often made to approximate the lifespan of the gas purging stones to that of the surrounding lining by selecting a particularly wear-resistant refractory material, in many cases it is more economical to have to replace the purging stones one or more times during a furnace trip of the refractory lining.
  • the sink In order to be able to recognize the right time for replacing the sink or for renewing the refractory lining, it is desirable to provide the sink with a device which indicates as soon as the sink has reached a predetermined residual thickness.
  • the sink consists of at least two refractory bodies with different light emitting capacities, which are preferably one inside the other are nested and have separation levels at a certain stone height. If the wear reaches one of these levels, this should be recognizable from the change in the brightness pattern of the light emitted by the hot surface.
  • such optical methods are not very reliable, since a bare sink surface is required for exact observation, but this is usually not available.
  • the sink is provided with a plurality of electrodes which are staggered in height and are insulated from one another and which are closed by the melt due to their electrical conductivity to form a circuit which is displayed.
  • the contact between the melt and the electrodes is slight, e.g. can be interrupted by slag inclusions, this arrangement is very susceptible to failure.
  • DE-A-34 24 466 two electrodes are arranged in a probe inserted into the sink, which is closed against the hot end of the stone, the tip of which is at a certain stone height.
  • the sink is provided with electrical conductors which are combined to form a framework of longitudinal conductors and transverse conductors which are staggered in height.
  • the display circuit is closed for the unused sink.
  • that electrical conductor melts and is interrupted thereby, which the molten metal initially approaches in the course of wear.
  • the sink can instead be provided with thermocouples which extend to different stone heights and can be connected to an electrical display device.
  • the sink according to DE-C-36 23 609 has a valve in the gas supply opening with a valve body which is held in an open position by a fuse or a bimetal strip. If the temperature rises as a result of wear of the sink, the fuse should melt or the bimetallic strip should be deflected, as a result of which the valve body goes into the closed position, in which a reduced gas flow rate flows. Since with this arrangement The fuse or the bimetallic strip are at some distance from the metal melt, an unobstructed heat flow is required for reliable triggering, but this can be disturbed.
  • the object of the invention is to provide a gas purging plug with a residual strength indicator, which is triggered in a simple and reliable manner by the molten metal even under the harsh operating conditions of practice.
  • the measuring probe comprises a tube and a wire which is movable and biased by a spring, the wire at the tip of the measuring probe is connected to the tube by a detachable connection as a result of exposure to heat or contact with the molten metal and is provided with an optical display device in the part of the measuring probe projecting over the cold stone end.
  • the detachable connection at the tip of the measuring probe can preferably be a soldering or welding point, but it can also be formed by a split pin.
  • the optical display device can be formed by a flag attached to the wire, which projects outwards through a slot in the tube of the measuring probe, or it can be formed by a plate arranged outside the tube and connected to the wire.
  • the material that forms the connection between the tube and the wire is caused by the temperature increase, when using a solder, for example, when the temperature reaches about 1000 ° C, or by direct contact of the tip with the molten metal melted and the connection loosened.
  • the pre-tensioned wire is now pulled back by the spring and this is made clearly visible by the downward movement of the optical display device.
  • a ceramic part e.g. in the form of a tube or a plate, which is penetrated by the wire.
  • the tube can also be filled with powdered refractory material in which the wire is embedded.
  • FIG. 1 a sink according to the invention with a measuring probe for displaying the Stone residual strength
  • FIGS. 2 to 4 in an enlarged view three embodiments of the tip area of the measuring probe
  • FIG. 5 a variant of the display area of the measuring probe.
  • the refractory sink 1 is enclosed by a sheet metal casing, consisting of a casing sheet 2 and a bottom sheet 3, the hot-side, upper end face remaining free for the escape of the purge gas.
  • a gas distribution space 4 is kept free between the cold-side, lower end face of the sink 1 and the base plate 3, for example by arranging some spacers 5.
  • a gas feed pipe 6 is attached to the base plate 3 and opens into the gas distribution space 4.
  • a measuring probe 7 is arranged in the sink 1, the tip of which is located at a predetermined distance from the cold end of the stone.
  • the measuring probe 7 passes through the base plate 3 and the gas distribution space 4, projects with its lower part over the cold stone end and is appropriately leaned against the gas supply pipe 6.
  • the measuring probe 7 comprises a tube 8, for example a steel tube of 2 to 5 mm outside diameter and a wall thickness of about 0.5 to 1 mm, and a wire 9, e.g. with 0.5 to 1 mm diameter.
  • the wire 9 is connected to the tube 8 by a connection which is detachable due to the action of heat or contact with the molten metal. According to the embodiment shown in FIGS.
  • this releasable connection consists in a soldering or welding point 10.
  • the wire 9 is biased in the tube 8 by a spring which is expediently attached to the lower end of the tube 8.
  • the embodiment shown in FIG. 1 is a tension spring 12.
  • a flag 14 is attached to the wire 9 as an optical display device and protrudes outwards through a slot formed in the tube 8.
  • the molten metal approaches the tip of the measuring probe 7 and causes the soldering or welding point 10 to melt.
  • the connection between the tube 8 of the measuring probe 7 and the wire 9 is released, the wire 9 is pulled down by the tension spring 12, and as a result the flag 14 attached to the wire 9 is also moved downwards, which is the signal for this. that the sink has reached the predetermined residual strength.
  • a ceramic part in the form of a ceramic tube 16 is arranged between the upper edge of the tube 8 and the soldering or welding point 10.
  • the releasable connection is formed by a split pin 11.
  • a ceramic part in the form of a ceramic plate 17 is inserted between this split pin 11 and the upper edge of the tube 8.
  • the purpose of the ceramic tube 16 and the ceramic plate 17 is to prevent the wire 9 from being welded to the tube 8 by the molten metal and thus to ensure reliable loosening of the connection formed by the soldering or welding point 10 or the split pin 11.
  • the tube 8 can also be coated with a powdered refractory material 18, e.g. fill with magnesia flour, in which the wire 9 is embedded.
  • FIG. 5 shows another embodiment of the display area of the measuring probe 7.
  • a compression spring 13 which is arranged between the lower end of the tube 8 and a plate 15 attached to the wire 9.
  • the plate 15 serves as a residual strength indicator, since it jumps away when the connection at the probe tip is released under the action of the compression spring 13.
  • the hole for receiving the measuring probe 7 is expediently drilled in the finished flushing block.
  • the measuring probe 7 can be cast in.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
EP89890107A 1988-04-13 1989-04-13 Brique de brassage réfractaire et perméable aux gaz Ceased EP0337982A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0095888A AT388936B (de) 1988-04-13 1988-04-13 Feuerfester, gasdurchlaessiger spuelstein
AT958/88 1988-04-13

Publications (1)

Publication Number Publication Date
EP0337982A1 true EP0337982A1 (fr) 1989-10-18

Family

ID=3503736

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89890107A Ceased EP0337982A1 (fr) 1988-04-13 1989-04-13 Brique de brassage réfractaire et perméable aux gaz
EP89903956A Pending EP0363464A1 (fr) 1988-04-13 1989-04-13 Brique de brassage refractaire et permeable aux gaz

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89903956A Pending EP0363464A1 (fr) 1988-04-13 1989-04-13 Brique de brassage refractaire et permeable aux gaz

Country Status (10)

Country Link
US (1) US5007366A (fr)
EP (2) EP0337982A1 (fr)
JP (1) JPH02503806A (fr)
KR (1) KR900700629A (fr)
AT (1) AT388936B (fr)
AU (1) AU608152B2 (fr)
BR (1) BR8906815A (fr)
HU (1) HUT54737A (fr)
WO (1) WO1989009836A1 (fr)
ZA (1) ZA892620B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681611A1 (fr) * 1991-09-24 1993-03-26 Plibrico Gmbh Pierre de lavage a gaz.
DE102013016156A1 (de) 2013-09-30 2015-04-02 Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg Spüler und Verfahren zum Messen einer Spülerrestlänge

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223108C1 (en) * 1992-07-14 1993-08-19 Veitscher Magnesitwerke-Actien-Gesellschaft, Wien, At Ceramic distributor element - with at least one gas channel provided with a restrictor
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
US5435528A (en) * 1994-04-12 1995-07-25 Reynolds Metals Company Porous plug structure for aluminum furances
US5573724A (en) * 1994-07-29 1996-11-12 Magneco/Metrel, Inc. Ladle port assembly
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.
JP3653422B2 (ja) 1999-08-20 2005-05-25 シャープ株式会社 排水処理方法および排水処理装置
WO2023196341A1 (fr) 2022-04-05 2023-10-12 Doggone Investment Co. LLC Appareil et procédé de production d'alliages à base de cuivre de haute pureté

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103539A (en) * 1977-02-07 1978-08-01 Exxon Research & Engineering Co. Non-destructive refractory erosion indicator
US4481809A (en) * 1983-08-29 1984-11-13 Labate M D Method and apparatus for monitoring erosion in gas stirring devices in molten metal ladles
EP0082078B1 (fr) * 1981-12-16 1985-08-07 Institut De Recherches De La Siderurgie Francaise (Irsid) Elément réfractaire perméable pour l'introduction d'un fluide de brassage dans un bain de métal en fusion
DE3623609C1 (de) * 1986-07-12 1988-01-21 Didier Werke Ag Gasspueleinrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT324386B (de) * 1972-08-21 1975-08-25 Voest Ag Behalter für schmelzflüssige metalle
SE8106056L (sv) * 1981-05-27 1982-11-28 Aikoh Co Poros plugg for gjutmetallkerl
AT386072B (de) * 1983-07-18 1988-06-27 Radex Deutschland Ag Feuerfester stein, insbesondere gasspuelstein
DE3341491C1 (de) * 1983-11-17 1985-07-11 Brohltal-Deumag AG für feuerfeste Erzeugnisse, 5401 Urmitz Gasspuelstein fuer metallurgische Gefaesse
DE3503221A1 (de) * 1985-01-31 1986-08-14 Didier-Werke Ag, 6200 Wiesbaden Feuerfester gasdurchlaessiger stein
DE3523171C1 (de) * 1985-06-28 1986-10-30 Didier-Werke Ag, 6200 Wiesbaden Gasspueleinrichtung
US4741515A (en) * 1986-10-20 1988-05-03 Bethlehem Steel Corporation Apparatus for introducing gas into a metallurgical vessel
IN168760B (fr) * 1987-04-10 1991-06-01 Injectall Ltd
US4744544A (en) * 1987-07-06 1988-05-17 Insul Company, Inc. Refractory erosion visual indicator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103539A (en) * 1977-02-07 1978-08-01 Exxon Research & Engineering Co. Non-destructive refractory erosion indicator
EP0082078B1 (fr) * 1981-12-16 1985-08-07 Institut De Recherches De La Siderurgie Francaise (Irsid) Elément réfractaire perméable pour l'introduction d'un fluide de brassage dans un bain de métal en fusion
US4481809A (en) * 1983-08-29 1984-11-13 Labate M D Method and apparatus for monitoring erosion in gas stirring devices in molten metal ladles
DE3623609C1 (de) * 1986-07-12 1988-01-21 Didier Werke Ag Gasspueleinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681611A1 (fr) * 1991-09-24 1993-03-26 Plibrico Gmbh Pierre de lavage a gaz.
DE4131756A1 (de) * 1991-09-24 1993-04-01 Plibrico Gmbh Gasspuelstein
DE102013016156A1 (de) 2013-09-30 2015-04-02 Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg Spüler und Verfahren zum Messen einer Spülerrestlänge

Also Published As

Publication number Publication date
EP0363464A1 (fr) 1990-04-18
HUT54737A (en) 1991-03-28
JPH02503806A (ja) 1990-11-08
BR8906815A (pt) 1990-11-20
AU3369789A (en) 1989-11-03
AT388936B (de) 1989-09-25
AU608152B2 (en) 1991-03-21
KR900700629A (ko) 1990-08-16
ATA95888A (de) 1989-02-15
WO1989009836A1 (fr) 1989-10-19
US5007366A (en) 1991-04-16
ZA892620B (en) 1989-12-27

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