[go: up one dir, main page]

WO1989007659A1 - Bloc permeable aux gaz pour operations metallurgiques - Google Patents

Bloc permeable aux gaz pour operations metallurgiques Download PDF

Info

Publication number
WO1989007659A1
WO1989007659A1 PCT/AT1989/000015 AT8900015W WO8907659A1 WO 1989007659 A1 WO1989007659 A1 WO 1989007659A1 AT 8900015 W AT8900015 W AT 8900015W WO 8907659 A1 WO8907659 A1 WO 8907659A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
flow channels
purging plug
channels
plug according
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
PCT/AT1989/000015
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3489722&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1989007659(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Priority to KR1019890701913A priority Critical patent/KR900700638A/ko
Publication of WO1989007659A1 publication Critical patent/WO1989007659A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the invention relates to a gas purging plug for metallurgical vessels, containing a refractory molded body with continuous flow channels.
  • various gases are often blown through the refractory lining into the molten metal, causing a stirring effect in the molten metal or different metallurgical reactions are triggered.
  • refractory, gas-permeable moldings are used in the refractory lining, in most cases in the bottom of the ovens or vessels, which are generally referred to as gas purging stones.
  • 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.
  • refractory moldings which are provided with narrow channels for blowing gas into a molten metal bath can be produced in that cores or mandrels which are intended to form the channels are arranged in a mold for the molding and secured in place. Then a pourable refractory
  • the cores or mandrels intended for the formation of the channels can be metal tubes which remain in the finished shaped body or wires which are pulled out of the shaped body, which is facilitated if the wires are provided with a coating.
  • the cores or mandrels can also be made of a meltable or evaporable material, e.g. B. made of plastic, which melts or evaporates during the drying process.
  • a meltable or evaporable material e.g. B. made of plastic, which melts or evaporates during the drying process.
  • the gas is blown through the sink only during certain times, e.g. B. during refreshing, required.
  • the gas flow could be turned off. If you do this however, it has the consequence that molten metal penetrates into the gas channels or into the stone pores, solidifies there and clogs the channels.
  • gas blowing resumes the metal melt which has penetrated is only partially melted and blown out again.
  • an inert gas to blow through the sink In order to prevent the penetration of molten metal, maintain a gas in the meantime, e.g. B. an inert gas to blow through the sink.
  • this requires a constant gas supply to the furnace or vessel, which is why this measure can only be used with stationary ovens or vessels.
  • movable vessels for example pouring ladles, which are moved by crane in the
  • pan sinks with directional porosity is approximately between 40% and 85% and for porous pan sinks approximately between 60% and 95% of the theoretical rinsing capacity, i. H.
  • the sink stones cannot be in use during their full theoretical lifespan, but must be replaced after a fraction of this time, which corresponds to the percentages mentioned.
  • the object of the invention is to design the gas purging plug so that the melting and blowing out of the metal infusion is possible to a large extent after each blow interruption.
  • this is achieved in a flushing system with continuous flow channels in that the striation channels, at least in the area adjacent to their outlet openings, are arranged in a highly inclined manner with respect to the direction of the longitudinal axis of the sink.
  • the flow channels can have an angle of inclination between 15 ° and 60 °, preferably between 20 ° and 50 °, with respect to that end face of the sink which contains the outlet openings of the flow channels.
  • the sink stones are subject to wear during operation, the sink area that was originally located inside the stone becomes the hot-sided sink surface after a certain period of operation.
  • the flow channels it is expedient to provide the oblique arrangement of the flow channels not only in the vicinity of the hot-side end face, but also in deeper stone areas so that the oblique arrangement of the flow channels is also included can accommodate limited stone width, it is recommended according to an embodiment of the invention, the flow channels to be helical, wavy or zigzag-shaped Since the sink stones are usually renewed at the latest when about two thirds of the original stone height are worn out, you can Flushing stone according to the invention also designed such that the oblique, in particular helical, wave-shaped or zigzag-shaped design of the flow channels extends over approximately two thirds of the stone height, seen from the end face containing the outlet openings che of the stone.
  • the formation of this swirl can be further favored in that the flow channels have the same inclination in each stone cross-section in a rotationally symmetrical arrangement.
  • the flushing stones according to the invention can be produced in a manner known per se and described at the outset by embedding channel-forming cores in a stone body made of refractory casting compound.
  • cores come, for example, burnable, fusible or evaporable materials, such as plastics, with a covering, e.g. B. made of plastic, provided wires or thin metal tubes, for. B. made of copper or steel.
  • These cores are dimensioned in such a way that the resulting flow channels have a clear width of the order of 1 mm or less.
  • Suitable casting compounds are primarily those based on high alumina or alumina or so-called "low cement castables", that is casting compounds which contain about 5% by weight of cement.
  • the basic materials of these casting compounds are primarily sintered clay, corundum, mullite, mullite clinker with 50 to 72% by weight of Al 2 O 3 , bauxite, sintered bauxite or andalusite.
  • Oiromoxide Cr 2 O 3 , zirconium (zirconium silicate), zirconium oxide, clay and calcined alumina are suitable as additives to these materials.
  • the casting compounds can be hydraulically bound, e.g. B. with alumina cement, or chemically bound, e.g. B. with a phosphate binder. Casting compositions based on magnesia, for example as described in AT-B-248 936, can also be used.
  • FIG. 1 shows a schematic, diagrammatic illustration, partially cut away.
  • FIG. 4 shows a detail of the sink of Fig. 2 in longitudinal section.
  • 1 has a refractory molded body 1 made of refractory casting compound, a sheet metal jacket 2 and a base plate 3 welded to the latter, to which a gas supply tube 4 is attached in the center.
  • This tube 4 opens into a gas distribution chamber which is filled with a gas-permeable plate 5 made of porous refractory material.
  • a porous refractory material can be used, which has been produced according to the method of AT-B-374 164.
  • the gas purging plug sits in a perforated brick 6, of which only a quarter is shown for reasons of clarity.
  • Flow channels 7 are arranged in the refractory molded body 1 and are formed in a helical shape in the exemplary embodiment shown in FIG. 1.
  • the gas purging plug shown has 17 such flow channels 7, which are arranged in a cross-section evenly distributed over the circle. For the sake of clarity, only one such flow channel 7 is shown in the drawing and some others are indicated.
  • the flow channels run from the gas distribution chamber filled with the gas-permeable plate 5 on the cold side of the sink to its hot-side end face 8, in which the outlet openings of the flow channels 7 are located.
  • the sink it can be carried out in an advantageous manner by first welding the sheet metal jacket 2, the base plate 3 and the gas supply tube 4 together and inserting the gas-permeable plate 5 and the cores to form the flow channels 7 into the resulting cavity Secures location. A refractory casting compound is then introduced, compacted and then dried by heating. If the cores consist of a heat-consumable (burnable, meltable or evaporable) material, such as plastic, or of wires covered with such a material, the flow channels 7 are formed during drying. In the case of the wires, they can remain in the sink and the passage of gas occurs due to the space being freed up due to the disappearance of the sheath.
  • a heat-consumable (burnable, meltable or evaporable) material such as plastic
  • wires covered with such a material the flow channels 7 are formed during drying. In the case of the wires, they can remain in the sink and the passage of gas occurs due to the space being freed up due to the disappearance of the sheath.
  • the gas purging plug according to FIG. 2 corresponds to that according to FIG. 1 with the difference that the flow channels 7 'are designed in a zigzag or undulating manner and that the gas distribution chamber 9 is designed as a cavity. 2 can be produced in the same manner as described in FIG. 1, but instead of the gas-permeable plate 5, a correspondingly shaped body made of an edible material, e.g. B. Styrofoam, is introduced, which disappears when heated while drying the casting compound and the
  • FIG. 4 From Fig. 4 it can be seen that the flow channels 7 ', of which only one is drawn for the sake of simplicity, have an angle of inclination ⁇ with respect to the end face 8 which contains the outlet openings of the flow channels.
  • a conventional vertical flow channel is shown in dashed lines in the right half of FIG. 4 for comparison. If one assumes that if the gas blowing is interrupted, the metal melt penetrates into the channel over a distance x and solidifies there, it can be seen that the depth of penetration, measured as a vertical distance from the end face (8), in the invention
  • Flow channel 7 ' is only x ⁇ sin ⁇ and is therefore less than the penetration depth x in the conventional vertical flow channel. If the end face 8 is subjected to heat again and the gas blowing is resumed, the metal which has penetrated can be used in the invention Flow channel are melted and blown out more easily than with the conventional flow channel.
  • the frustoconical gas distribution chamber in this case extends over approximately a third of the stone height, for example 80 to 100 mm, and is filled with a gas-permeable body 5 'made of porous refractory material. This creates an optical residual strength indicator for the point in time when the sink needs to be replaced. As soon as the sink is worn down to the gas-permeable body 5 ', the body 5' becomes visible on the hot side.
  • the flow channels 7 are arranged helically around support bodies 10, which are embedded in the refractory molded body 1.
  • These support bodies 10 are expediently frustoconical and, like the body 5 ′ serving for gas distribution, can consist of a porous refractory material produced according to the method of AT-B-374 164. If the support bodies 10 are gas-permeable, they offer additional options for the gas passage.
  • the helical or spiral flow channels 7 extend over the entire height of the support body (10); in the drawing, however, they are only indicated in the upper area because of the simpler representation,
  • the gas distribution chamber 9 can be sealed against the refractory molded body 1 by a metal housing and the metal tubes welded gas-tight to the metal housing, thereby preventing the refractory molded body 1 from being exposed to the flushing gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (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)
  • Sampling And Sample Adjustment (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Incineration Of Waste (AREA)
  • Treating Waste Gases (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Continuous Casting (AREA)
  • Materials For Medical Uses (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

Le bloc (1) perméable aux gaz pour opérations métallurgiques est constitué d'une substance réfractaire et est pourvu de canaux de passage (7) du gaz. Dans le but de faciliter les opérations de purge des canaux des infiltrations métalliques après un arrêt du soufflage, ces canaux (7) sont disposés fortement inclinés par rapport à l'axe longitudinal du bloc, au moins dans la zone près des ouvertures de sortie du gaz. L'angle (alpha) formé entre ces canaux et la face (8) du bloc pourvue desdites ouvertures peut varier entre 15° et 60° et de préférence entre 20° et 50°. Lesdits canaux (7) sont de préférence en forme d'hélice, d'ondulations ou sont disposés en zigzag.
PCT/AT1989/000015 1988-02-19 1989-02-17 Bloc permeable aux gaz pour operations metallurgiques Ceased WO1989007659A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890701913A KR900700638A (ko) 1988-02-19 1989-02-17 투과성 요소

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT40488 1988-02-19
ATA404/88 1988-02-19

Publications (1)

Publication Number Publication Date
WO1989007659A1 true WO1989007659A1 (fr) 1989-08-24

Family

ID=3489722

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1989/000015 Ceased WO1989007659A1 (fr) 1988-02-19 1989-02-17 Bloc permeable aux gaz pour operations metallurgiques

Country Status (10)

Country Link
EP (2) EP0356483A1 (fr)
KR (1) KR900700638A (fr)
AT (1) ATE62937T1 (fr)
AU (1) AU610697B2 (fr)
DE (1) DE58900091D1 (fr)
ES (1) ES2021894B3 (fr)
HU (1) HU891288D0 (fr)
IN (1) IN170797B (fr)
WO (1) WO1989007659A1 (fr)
ZA (1) ZA891290B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104540615A (zh) * 2012-09-20 2015-04-22 里弗雷克特里知识产权两合公司 耐火陶瓷气体吹洗塞以及用于制造所述气体吹洗塞的工序

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE470009B (sv) * 1991-03-04 1993-10-25 Stiftelsen Metallurg Forsk Förfarande och anordning för gasspolning av metallsmälta i en behållare
DE9103595U1 (de) * 1991-03-23 1991-07-04 Martin & Pagenstecher GmbH, 5000 Köln Einblasvorrichtung für ein metallurgisches Gefäß
DE4419811C1 (de) * 1994-06-07 1995-04-27 Plibrico Gmbh Gasspülstein mit Verschleißanzeige
WO1995033587A1 (fr) * 1994-06-08 1995-12-14 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Dispositif de rincage par les gaz pour cuve metallurgique, notamment un convertisseur d'acierie
FR2739312B1 (fr) * 1995-09-28 1997-10-31 Lorraine Laminage Element poreux destine a l'affinage d'un metal liquide dans un recipient metallurgique
DE19619204C1 (de) * 1996-05-11 1997-05-22 Veitsch Radex Ag Gasspüleinrichtung
DE19701806C2 (de) * 1997-01-21 1998-11-19 Didier Werke Ag Verwendung eines Drahtgeflechtes
FR2758486B1 (fr) * 1997-01-23 1999-03-26 Savoie Refractaires Dispositif perfectionne d'insufflation d'un gaz dans un metal en fusion
DE19750046A1 (de) * 1997-11-12 1999-05-20 Wilhelm Gerhard Venn Gasspülstein mit spiralförmigem Gaskanal
JP3126122B1 (ja) * 1999-08-19 2001-01-22 東京窯業株式会社 ガス吹き込み用プラグ及びその製作方法
DE102005029033B4 (de) * 2005-06-21 2007-10-11 Refractory Intellectual Property Gmbh & Co. Kg Verschlussstopfen für ein metallurgisches Schmelzgefäß
PL1736260T3 (pl) * 2005-06-21 2007-12-31 Refractory Intellectual Property Gmbh & Co Kg Żerdź zatyczkowa
DE102006031687B4 (de) * 2006-07-08 2008-08-14 Refractory Intellectual Property Gmbh & Co. Kg Element
UA126511C2 (uk) * 2020-10-05 2022-10-19 Товариство З Обмеженою Відповідальністю "Іннотех-Сплав" Спосіб обробляння рідкого металу газовим середовищем в металургійній ємності та пристрій для його здійснення

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200544B (de) * 1964-02-06 1965-09-09 Hufnagl Walter Duese aus Kapillaren
EP0080403A1 (fr) * 1981-11-23 1983-06-01 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Dispositif pour l'introduction de gaz dans un bain de métal liquide
AT376701B (de) * 1979-04-25 1984-12-27 Siderurgie Fse Inst Rech Gasdurchlaessiger baukoerper aus feuerfestem material und verfahren zu seiner herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200544B (de) * 1964-02-06 1965-09-09 Hufnagl Walter Duese aus Kapillaren
AT376701B (de) * 1979-04-25 1984-12-27 Siderurgie Fse Inst Rech Gasdurchlaessiger baukoerper aus feuerfestem material und verfahren zu seiner herstellung
EP0080403A1 (fr) * 1981-11-23 1983-06-01 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Dispositif pour l'introduction de gaz dans un bain de métal liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Radex-Rundschau, 1983, Heft 3, B. Graber et al.: "Einsatz und Verschleiss von Sp}lsteinen in der Sekund{rmetallurgie" Seiten 179-208 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104540615A (zh) * 2012-09-20 2015-04-22 里弗雷克特里知识产权两合公司 耐火陶瓷气体吹洗塞以及用于制造所述气体吹洗塞的工序

Also Published As

Publication number Publication date
HU891288D0 (en) 1990-03-28
AU610697B2 (en) 1991-05-23
DE58900091D1 (de) 1991-05-29
KR900700638A (ko) 1990-08-16
EP0356483A1 (fr) 1990-03-07
ATE62937T1 (de) 1991-05-15
EP0329645A1 (fr) 1989-08-23
EP0329645B1 (fr) 1991-04-24
IN170797B (fr) 1992-05-23
ZA891290B (en) 1991-10-30
AU3061989A (en) 1989-09-06
ES2021894B3 (es) 1991-11-16

Similar Documents

Publication Publication Date Title
EP0329645B1 (fr) Brique de brassage au gaz
DE2702435C2 (de) Auswechselbare Verschleißplatte für Schieberverschlüsse und Verfahren zu deren Herstellung
DE2259553B2 (de) Zwischenbehälter für Stranggießanlagen
DE4031403A1 (de) Keramisches schweissverfahren und lanze zur verwendung in einem solchen verfahren
DE3406075C2 (fr)
EP0105868B1 (fr) Four métallurgique ou récipient métallurgique
EP0181853B1 (fr) Brique pour lavage au gaz pour fours et récipients métallurgiques
DE3241923A1 (de) Vorrichtung zur beseitigung der in den fluessigen metallen enthaltenen einschluesse
WO1982003339A1 (fr) Filtre en ceramique, procede de fabrication et utilisation de ce filtre
DE3406076C2 (fr)
DE3433123C2 (de) Blasstein für metallurgische Pfannen und Verfahren zu seinem Einfügen in die Zustellung
EP0432628A1 (fr) Procédé pour augmenter la solidité d'un revêtement réfractaire d'enceinte
DE3412388A1 (de) Feuerfester eintauchausguss
DE3441324A1 (de) Verfahren und vorrichtung zum vermeiden einer wirbelbildung in einem giessbehaelter mit stopfenausguss
DE4419811C1 (de) Gasspülstein mit Verschleißanzeige
DE2219096A1 (de) Gießrinne
DE29503495U1 (de) Feuerfestauskleidung für Stahlpfannen
DE4207881C1 (en) Gas flushing brick for melting vessels - has gas channels slightly inclined to vertical to ensure that gas flow is towards centre of vessel despite non-vertical fitting of brick inside vessel bottom
DE3545432C2 (fr)
DE69219745T2 (de) Auskleidungsbeschichtung für Gefäss wie zum Beispiel Giesspfanne
DE2049681A1 (de) Als Einheit gegossener hochschmelzender Stein und Verfahren zu seiner Herstellung
DE102005061291B4 (de) Keramischer Lochstein und metallurgisches Gefäß
DE19750040C1 (de) Feuerfester keramischer Lochstein
DE19750039C1 (de) Monolithischer, feuerfester, keramischer Lochstein
DE19643111C2 (de) Verwendung von Steinen für die Stahlindustrie

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR HU JP KR SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1989902368

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1989902368

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1989902368

Country of ref document: EP