EP0926458A1 - Procédé et dispositif pour renouveler le revêtement d'un trou de coulée d'un four metallurgique - Google Patents
Procédé et dispositif pour renouveler le revêtement d'un trou de coulée d'un four metallurgique Download PDFInfo
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- EP0926458A1 EP0926458A1 EP98890343A EP98890343A EP0926458A1 EP 0926458 A1 EP0926458 A1 EP 0926458A1 EP 98890343 A EP98890343 A EP 98890343A EP 98890343 A EP98890343 A EP 98890343A EP 0926458 A1 EP0926458 A1 EP 0926458A1
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- Prior art keywords
- opening
- perforated
- lining
- stack
- infeed
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Classifications
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- 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
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
- F27D3/1527—Taphole forming equipment, e.g. boring machines, piercing tools
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- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
Definitions
- the invention relates to a method for creating, in particular for Renewal of a fireproof lining of a tap hole from metallurgical vessels, the delivery and / or the standing part of the hole lining was broken out and one, one Perforated stone part with a continuous channel into the vascular delivery is walled in. Furthermore, the invention comprises a device for creating, especially for the renewal of a refractory lining a tap hole in the delivery of metallurgical vessels.
- Metallurgical vessels are used for melting, treatment and transportation of liquid metals and alloys and essentially have one load-bearing outer wall made of sheet steel with an internal refractory lining from a ramming mass or from brick material.
- smelting furnaces such as Converters, electric arc furnaces and the like
- high melt weights operated by a few hundred tons in addition to operational reasons also Quality requirements for the alloy, especially with regard to its Purity, pouring the melt through a tap hole in the Make the vessel wall necessary.
- the refractory lining material for tap holes is high thermal and in particular the highest erosive stresses from the flowing metal exposed. For these reasons, delivery is made by a or several perforated stones of the highest quality. Despite using high-quality stone material, erosions or washouts occur on the Inner wall of the stones, which can be enlarged in places and one intermittent fanning out, a so-called "flattening" of the pouring stream in cause disadvantageous. Furthermore, it is mostly due to a high melt number the cross-section of the tap opening enlarges, resulting in a higher pouring rate and thereby causing a disadvantageous suction of slag from the mold level.
- a local breakout required. This usually involves dividing the standing ones or remaining eroded perforated brick lining and a discharge of the Pieces, preferably pneumatic hammers used and these be directed by people.
- the opening if necessary up to a so-called permanent feed, by removing Residual material, for which special tools are preferably used brought a substantially cylindrical dimension.
- metallurgical vessel thereon has a continuous channel Perforated brick part walled in and secured.
- the invention is based on the object of creating a new method or to renew a refractory lining of a tap hole from to specify metallurgical vessels with which with high security and Execution quality requires less time and thus an increase plant productivity is achievable.
- Another object of the invention is in creating a device of the type mentioned, which with high Accuracy and protection of the refractory lining of the metallurgical vessel allows a cylindrical opening to be broken out in less time and an exact installation of a perforated brick part with high walling or Can ensure connection quality for delivery.
- This object is achieved in that in a first step in the delivery and / or in the standing part of the lining of a Tap hole a cylindrical opening by means of the refractory material breaking or eroding processing is introduced with the measure, that the processing by at least one, small area in each sub-area the cross section of the breakthrough tool to be created, this over the breakthrough cross section perpendicular to its axial direction in particular is rotated and in a second step at least two Perforated bricks with an opening opposite the infeed compiled smaller outer diameter to a tube stack or be bricked and this stack by means of a device in the opening of the Delivery of the metallurgical vessel is introduced and held, after which in the gap between the inner surface of the opening of the hole in the Vascular delivery and the outer surface of the stack of perforated stones, especially pressing or pouring and hardening one plasticized refractory mass is carried out and, if necessary, the introduction agent is subtracted.
- the further goal is with a generic facility thereby achieved that the device from at least one breakout device to create or insert a cylindrical opening in the delivery of the metallurgical vessel and at least one insertion device for a Implanting at least one perforated stone into the vascular delivery, the breakout device and the insert device can be activated in sequence are.
- the processing small area can be high locally even with low impact energy specific breaking or removal of refractory material can be achieved without that a risk of destruction for the vascular delivery in the area of the to be created Opening is given.
- the tool or hammer is placed over the Breakthrough cross section moved perpendicular to the direction of its axis, so that advantageous a largely cylindrical opening is created in the infeed.
- a perforated stone part is formed Compilation of a stack of several perforated stones, if necessary have cooperating fitting surfaces. This procedure is therefore favorable because smaller perforated bricks can be manufactured more easily or with better quality than large ones.
- the stack of perforated stones in the cylindrical opening which was in the previous Process step was created, introduced, lie for its full surface walling due to the by the invention Machining created smooth inner surface of the hole or opening particularly advantageous conditions.
- walling takes place with a plasticized refractory mass, with particularly good density in the Gap area between the hole and perforated stones with a short hardening time of the mass are reachable. If the breakout device and the insertion device in Sequence can be activated, can advantageously short periods of time for a Rack replacement can be achieved in a metallurgical vessel.
- a particularly advantageous time saving when breaking out can be achieved if the opening or hole in the infeed and / or in the standing part the lining of the tap opening due to the breaking effect of several a rotating drilling unit combined, each carrying tools Pneumatic or hydraulic hammers is introduced.
- the accuracy of the opening in the metallurgical vessel can be increased if to Drilling the drilling unit with the tools in their angular position and working position positioned by means of an adjustable carriage and axially to Hole creation process.
- the breakout device consists of at least a small format, at least one that refracts the refractory material or abrasive compressed air or hydraulic chamber with tool cutting edge which hammer is formed over the opening cross section perpendicular to it Axial direction is preferably rotatable.
- the breakout device is out several preferably pneumatic or hydraulic hammers, which are concentric are combined to form a drilling unit rotatable about the axis.
- the excavation device is by means of an adjustable in its alignment mount is axially movable.
- the Inserting device For delivering the rack, especially with regard to one required as little time as possible and to a high Operational safety has proven to be advantageous if the Inserting device a supporting part with an adjusting and / or clamping part for a has axial alignment of at least two perforated or tubular stones and the Insertion device with the stack of perforated or tubular stones axially aligned with that in the Delivery introduced opening can be set up and the stone stack preferably can be inserted into the opening by means of a carriage.
- the breakout device and the insertion device are displaceable or displaceable by means of the same carriage.
- FIG. 1 An excavation device 1 can be seen from FIG. 1, which has a drilling unit 20 has, which is arranged on a carriage 3 slidably.
- the drilling unit 20 consists of a large number of small pneumatic hammers 2, 2 ', 2 ", each Wear tools with a cutting edge 21, 21 '.
- As protection and as a guide for the drilling unit 20 is provided a tubular body enclosing this.
- a drive 11 can perform a rotary movement of the drilling unit 20 become.
- a insertion device 5 is shown, which on a carriage 3 ' is arranged movable.
- a support member 52 which with an adjustment or Clamping part 53 is in operative connection, perforated or tubular stones 51 are one above the other formed into a tube stack 50.
- Fig. 3a to 3c is the process schematically with one made from the inside Renewal of the refractory lining of a tap hole in an electric arc furnace A shown with an eccentric bottom cut.
- 3a shows one by means of a Device 33 mountable mount 3 for a breakout device 1 with a Drilling unit 20, which tools with small-area tool cutting edges 21 owns. After an ax-precise alignment of the drilling unit 20 on the The tap is opened at the delivery 4, as shown by the arrow and, as can be seen from FIG. 3b, machining or a cylindrical cutout made when turning the drilling unit 20.
- FIG. 4a to 4d illustrate the mode of operation of an inventive device Device when renewing the rack from the outside Fig. 4a and Fig. 4b each show a breakout device 1 and an insertion device 5 on one Cross member 6 in a so-called "parking position".
- Figures 4c and 4d illustrate the situation of the breakout device 1 when introducing a cylindrical Opening in a refractory lining 4 and the insertion device 5 at Implanting a stack of perforated stones 50 in the area of the permanent feed 41 Lining a metallurgical vessel.
- Fig. 5 shows a breakout device 1 and an insertion device 5, which in Direction of arrow are slidably mounted on a movable cross member 6.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Erstellung, insbesondere zur Erneuerung einer feuerfesten Auskleidung einer Abstichöffnung von metallurgischen Gefäßen, wobei in deren Abstichbereich die Zustellung und/oder der stehende Teil der Lochauskleidung ausgebrochen und ein, einen durchgehenden Kanal aufweisender Lochsteinteil in die Gefäßzustellung eingemauert wird. Weiters umfaßt die Erfindung eine Vorrichtung zur Erstellung, insbesondere zur Erneuerung einer feuerfesten Auskleidung eine Abstichöffnung in der Zustellung von metallurgischen Gefäßen.The invention relates to a method for creating, in particular for Renewal of a fireproof lining of a tap hole from metallurgical vessels, the delivery and / or the standing part of the hole lining was broken out and one, one Perforated stone part with a continuous channel into the vascular delivery is walled in. Furthermore, the invention comprises a device for creating, especially for the renewal of a refractory lining a tap hole in the delivery of metallurgical vessels.
Metallurgische Gefäße dienen zur Erschmelzung, Behandlung sowie zum Transport von flüssigen Metallen und Legierungen und besitzen im wesentlichen eine tragende Außenwand aus Stahlblech mit einer innenseitigen feuerfesten Zustellung aus einer Stampfmasse oder aus gemauertem Steinmaterial. Aus wirtschaftlichen Gründen werden oftmals metallurgische Gefäße, zum Beispiel Schmelzöfen, wie Konverter, Elektrolichtbogenöfen und dergleichen, mit hohen Schmelzgewichten von einigen hundert Tonnen betrieben, wobei neben operativen Gründen auch die Qualitätsanforderungen an die Legierung, insbesondere hinsichtlich deren Reinheitsgrades, ein Ausgießen der Schmelze durch eine Abstichöffnung in der Gefäßwand erforderlich machen.Metallurgical vessels are used for melting, treatment and transportation of liquid metals and alloys and essentially have one load-bearing outer wall made of sheet steel with an internal refractory lining from a ramming mass or from brick material. For economic Metallurgical vessels, for example smelting furnaces such as Converters, electric arc furnaces and the like, with high melt weights operated by a few hundred tons, in addition to operational reasons also Quality requirements for the alloy, especially with regard to its Purity, pouring the melt through a tap hole in the Make the vessel wall necessary.
Das feuerfeste Material der Auskleidung von Abstichöffnungen ist hohen thermischen und insbesondere höchsten erosiven Beanspruchungen durch das fließende Metall ausgesetzt. Aus diesen Gründen erfolgt die Zustellung durch einen oder mehrere Lochsteine mit höchster Güte. Trotz einer Verwendung von hochwertigem Steinmaterial treten Erosionen bzw. Auswaschungen an der Innenwand der Steine auf, die stellenweise vergrößert sein können und eine zeitweise Auffächerung , ein sogenanntes " Flattem" des Gießstrahles in nachteiliger Weise bewirken. Weiters ist durch eine hohe Schmelzenzahl zumeist der Querschnitt der Abstichöffnung vergrößert, was eine höhere Gießrate und dadurch ein nachteiliges Einsaugen von Schlacke vom Gießspiegel bewirkt. Weil nun die Zustellung der metallurgischen Gefäße eine wesentlich größere Lebensdauer hat bzw. weil deren Verschleiß in Grenzen keine nachteilige Wirkung besitzt, hingegen eine unvermeidliche erosionsbedingte Änderung des Querschnittes der Abstichöffnung im weit geringerem Ausmaß aus gießtechnischen und metallurgischen Gründen nicht zugelassen werden kann, ist es notwendig, die feuerfeste Auskleidung der Abstichöffnung nach Bedarf auswechseln zu können.The refractory lining material for tap holes is high thermal and in particular the highest erosive stresses from the flowing metal exposed. For these reasons, delivery is made by a or several perforated stones of the highest quality. Despite using high-quality stone material, erosions or washouts occur on the Inner wall of the stones, which can be enlarged in places and one intermittent fanning out, a so-called "flattening" of the pouring stream in cause disadvantageous. Furthermore, it is mostly due to a high melt number the cross-section of the tap opening enlarges, resulting in a higher pouring rate and thereby causing a disadvantageous suction of slag from the mold level. Because now the delivery of the metallurgical vessels is much larger Lifetime has or because its wear within limits has no adverse effect has, however, an inevitable erosion-related change in Cross-section of the tap opening to a much lesser extent from casting technology and metallurgical reasons can not be approved, it is necessary to to be able to replace the fireproof lining of the tap opening as required.
Zur Erneuerung der feuerfesten Auskleidung der Abstichöffnung ist vorerst ein örtliches Ausbrechen erforderlich. Dabei erfolgt zumeist ein Zerteilen der stehenden bzw. verbliebenen erodierten Lochsteinauskleidung und ein Austrag der Bruckstücke, wobei vorzugsweise Preßlufthämmer eingesetzt und diese zielgerichtet von Personen geführt werden. Nachfolgend wird die Öffnung, gegebenenfalls bis zu einem sogenannten Dauerfutter, durch Abtragen von Restmaterial, wofür vorzugsweise besondere Werkzeuge verwendet werden, auf ein im wesentlichen zylindrisches Maß gebracht. In die derart erstellte Öffnung im metallurgischen Gefäß wird darauf ein einen durchgehenden Kanal aufweisender Lochsteinteil eingemauert und gesichert.To renew the fireproof lining of the tap hole is initially a local breakout required. This usually involves dividing the standing ones or remaining eroded perforated brick lining and a discharge of the Pieces, preferably pneumatic hammers used and these be directed by people. Below is the opening if necessary up to a so-called permanent feed, by removing Residual material, for which special tools are preferably used brought a substantially cylindrical dimension. In the opening created in this way metallurgical vessel thereon has a continuous channel Perforated brick part walled in and secured.
Eine derartige Erneuerung des Abstiches erfordert den Auf- und Abbau einer Mannschafts- bzw. Bedienungsbühne am metallurgischen Gefäß, ist mit einem hohen Zeitaufwand, wodurch die Produktivität der Schmelzenanlage verschlechtert wird, verbunden und schließt Einbaufehler nicht aus. Weiters ist die Mannschaft vor Ort großen Hitzeeinwirkungen ausgesetzt.Such a renewal of the racking requires the assembly and disassembly of one Team or operating platform on the metallurgical vessel, is with one high expenditure of time, which worsens the productivity of the melting plant is connected and does not exclude installation errors. Furthermore, the team is ahead Exposed to extreme heat.
Der Erfindung liegt nun die Aufgabe zugrunde, ein neues Verfahren zur Erstellung oder zur Erneuerung einer feuerfesten Auskleidung einer Abstichöffnung von metallurgischen Gefäßen anzugeben, mit welchem bei hoher Sicherheit und Ausführungsgüte ein geringerer Zeitauwand erforderlich und damit eine Erhöhung der Anlagenproduktivität erreichbar ist. Ein weiteres Ziel der Erfindung besteht darin, eine Vorrichtung der eingangs genannten Art zu schaffen, welche mit hoher Genauigkeit und Schonung der Feuerfestzustellung des metallurgischen Gefäßes ein Ausbrechen einer zylindrischen Öffnung mit geringerem Zeitaufwand ermöglicht und einen genauen Einbau eines Lochsteinteiles mit hoher Einmauerungs- bzw. Verbindungsgüte zur Zustellung sicherstellen kann. The invention is based on the object of creating a new method or to renew a refractory lining of a tap hole from to specify metallurgical vessels with which with high security and Execution quality requires less time and thus an increase plant productivity is achievable. Another object of the invention is in creating a device of the type mentioned, which with high Accuracy and protection of the refractory lining of the metallurgical vessel allows a cylindrical opening to be broken out in less time and an exact installation of a perforated brick part with high walling or Can ensure connection quality for delivery.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in einem ersten Schritt in die Zustellung und/oder in den stehenden Teil der Auskleidung einer Abstichöffnung eine zylindrische Öffnung mittels einer das Feuerfestmaterial brechenden bzw. abtragenden Bearbeitung mit der Maßnahme eingebracht wird, daß die Bearbeitung durch mindestens ein, kleinflächig in jeweils einem Teilbereich des Querschnittes vom zu erstellenden Durchbruch wirkendes Werkzeug erfolgt, wobei dieses über den Durchbruchquerschnitt senkrecht zu dessen Axrichtung insbesondere rotierend bewegt wird und in einem zweiten Schritt mindestens zwei Lochsteine mit einem gegenüber der in die Zustellung eingebrachten Öffnung geringerem Außendurchmesser zu einem Rohrstapel zusammengestellt oder gemauert werden und dieser Stapel mittels einer Vorrichtung in die Öffnung der Zustellung des metallurgischen Gefäßes eingebracht und gehalten wird, wonach in den Spalt zwischen Innenoberfläche der Öffnung der Bohrung in der Gefäßzustellung und der Außenoberfläche des Lochsteinstapels ein Einbringen, insbesondere ein Eindrücken oder Eingießen und ein Erhärten lassen einer plastifizierten feuerfesten Masse erfolgt und gegebenenfalls das Einbringmitttel abgezogen wird. Das weitere Ziel wird bei einer gattungsgemäßen Einrichtung dadurch erreicht, daß die Vorrichtung aus mindestens einer Ausbrucheinrichtung zur Erstellung bzw. Einbringung einer zylindrischen Öffnung in die Zusstellung des metallurgischen Gefäßes und mindestens einer Einsetzvorrichtung für ein Implantieren zumindest eines Lochsteines in die Gefäßzustellung gebildet ist, wobei die Ausbrucheinrichtung und die Einsatzvorrichtung in Sequenz aktivierbar sind.This object is achieved in that in a first step in the delivery and / or in the standing part of the lining of a Tap hole a cylindrical opening by means of the refractory material breaking or eroding processing is introduced with the measure, that the processing by at least one, small area in each sub-area the cross section of the breakthrough tool to be created, this over the breakthrough cross section perpendicular to its axial direction in particular is rotated and in a second step at least two Perforated bricks with an opening opposite the infeed compiled smaller outer diameter to a tube stack or be bricked and this stack by means of a device in the opening of the Delivery of the metallurgical vessel is introduced and held, after which in the gap between the inner surface of the opening of the hole in the Vascular delivery and the outer surface of the stack of perforated stones, especially pressing or pouring and hardening one plasticized refractory mass is carried out and, if necessary, the introduction agent is subtracted. The further goal is with a generic facility thereby achieved that the device from at least one breakout device to create or insert a cylindrical opening in the delivery of the metallurgical vessel and at least one insertion device for a Implanting at least one perforated stone into the vascular delivery, the breakout device and the insert device can be activated in sequence are.
Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß in zwei weitgehend mechanisierten und automatisierbaren Schritten eine Erstellung oder Erneuerung der Auskleidung einer Abstichöffnung vorgenommen wird. Dabei ist es wichtig, daß im ersten Schritt bei einem Ausbrechen einer zylindrischen Öffnung in die Ausmauerung mit geringer Schlagenergie des Werkzeuges, jedoch mit hoher spezifischer brechender bzw. abtragender Leistung desselben vorgegangen wird. Hohe Schlagenergien können zu einem trichterförmigem Ausbrechen ganzer Zustellungsteile führen und oftmals deren Dauerfutter im Anstichbereich ausschlagen.Geringe Schlagenergien eines dem Ausbruchsquerschnitt angepaßten Werkzeuges sind für einen Vortrieb jedoch weitgehend wirkungslos. Wenn, wie erfindungsgemäß vorgesehen, die Bearbeitung kleinflächig erfolgt, kann örtlich auch mit geringer Schlagenergie ein hohes spezifisches Brechen oder Abtragen von Feuerfestmaterial erreicht werden, ohne daß eine Zerstörungsgefahr für die Gefäßzustellung im Umkreis der zu erstellenden Öffnung gegeben ist. Das Werkzeug bzw. der Hammer wird dabei über den Durchbruchquerschnitt senkrecht zu dessen Axrichtung bewegt, so daß vorteilhaft eine weitgehend zylindrische Öffnung in der Zustellung entsteht.The advantages achieved by the invention are essentially to be seen in that in two largely mechanized and automatable steps Creation or renewal of the lining of a tap opening made becomes. It is important that the first step in the event of a breakout cylindrical opening in the lining with low impact energy of Tool, but with a high specific breaking or abrasive capacity the same is done. High impact energies can lead to one cause funnel-shaped breaking out of whole delivery parts and often their Knock out the permanent feed in the tapping area Cut-out cross-section of adapted tools are, however, for advance largely ineffective. If, as provided according to the invention, the processing small area, can be high locally even with low impact energy specific breaking or removal of refractory material can be achieved without that a risk of destruction for the vascular delivery in the area of the to be created Opening is given. The tool or hammer is placed over the Breakthrough cross section moved perpendicular to the direction of its axis, so that advantageous a largely cylindrical opening is created in the infeed.
Im zweiten Schritt erfolgt eine Bildung eines Lochsteinteiles durch Zusammenstellung eines Stapels aus mehreren Lochsteinen , die gegebenenfalls kooperierende Paßflächen aufweisen. Diese Vorgangsweise ist deshalb günstig, weil kleinere Lochsteine leichter bzw. mit besserer Güte als Große herstellbar sind. Wird nun der Lochsteinstapel in die zylindrische Öffnung, die im vorangegangenen Verfahrensschritt erstellt wurde, eingebracht, so liegen für dessen volloberflächliches Einmauern auf Grund der durch die erfindungsgemäße Bearbeitung erstellten glatten Innenoberfläche der Bohrung bzw. Öffnung besonders vorteilhafte Bedingungen vor. Erfindungsgemäß erfolgt ein Einmauern mit einer plastifizierten feuerfesten Masse, wobei besonders gute Dichte im Spaltbereich zwischen Bohrung und Lochsteinen bei kurzer Härtezeit der Masse erreichbar sind. Wenn dabei die Ausbruchseinrichtung und die Einsetzvorrichtung in Sequenz aktivierbar sind, können vorteilhaft kurze Zeitspannen für eine Absticherneuerung in einem metallurgischen Gefäß erreicht werden.In the second step, a perforated stone part is formed Compilation of a stack of several perforated stones, if necessary have cooperating fitting surfaces. This procedure is therefore favorable because smaller perforated bricks can be manufactured more easily or with better quality than large ones. Now the stack of perforated stones in the cylindrical opening, which was in the previous Process step was created, introduced, lie for its full surface walling due to the by the invention Machining created smooth inner surface of the hole or opening particularly advantageous conditions. According to the invention, walling takes place with a plasticized refractory mass, with particularly good density in the Gap area between the hole and perforated stones with a short hardening time of the mass are reachable. If the breakout device and the insertion device in Sequence can be activated, can advantageously short periods of time for a Rack replacement can be achieved in a metallurgical vessel.
Eine besonders vorteilhafte Zeitersparnis beim Ausbrechen kann erreicht werden, wenn die Öffnung oder Bohrung in die Zustellung und/oder in den stehenden Teil der Auskleidung der Abstichöffnung durch die brechende Wirkung mehrerer zu einer rotierenden Bohreinheit zusammengefaßter, jeweils werkzeugtragenden Preßluft- oder Hydraulikhämmer eingebracht wird.A particularly advantageous time saving when breaking out can be achieved if the opening or hole in the infeed and / or in the standing part the lining of the tap opening due to the breaking effect of several a rotating drilling unit combined, each carrying tools Pneumatic or hydraulic hammers is introduced.
Die Genauigkeit der Ausbruchsöffnung im metallurgischen Gefäß, insbesondere im Hinblick auf den Erhalt des Dauerfutters, kann gesteigert werden, wenn zur Einbringung der Bohrung die Bohreinheit mit den Werkzeugen in ihrer Winkellage und Arbeitsposition mittels einer einstellbaren Lafette positioniert und axial zur Bohrungserstellung verfahren wird. The accuracy of the opening in the metallurgical vessel, especially in the With regard to the maintenance of the permanent feed, can be increased if to Drilling the drilling unit with the tools in their angular position and working position positioned by means of an adjustable carriage and axially to Hole creation process.
Wenn, wie gefunden wurde, zur Erstellung der feuerfesten Auskleidung der Abstichöffnung auf einer eine Basisplatte aufweisenden Vorrichtung ein Lochstein- bzw. Rohrsteinstapel gebildet und dieser mittels der Vorrichtung in der Bohrung der Zustellung derart zentriert bzw. positioniert wird, daß zwischen Basisplatte und Außenwand des metallurgischen Gefäßes, gegebenenfalls unter Zwischenlage eines Dichtmittels eine Abdichtung nach außen erfolgt und plastifizierte Masse in den Spalt zwischen Mauerung und Lochsteinstempel eingebracht und erhärten gelassen wird, kann das Einsatzverfahren mit besonderer Güte vorteilhaft in kurzer Zeit durchgeführt werden.If, as was found, create the fireproof lining of the Tap hole on a device having a base plate a perforated or pipe block stack formed and this by means of the device in the bore of Infeed is centered or positioned so that between the base plate and Outer wall of the metallurgical vessel, optionally with an intermediate layer a sealant is sealed to the outside and plasticized mass in the gap between the masonry and perforated stone stamp introduced and harden is left, the application method with special quality can be advantageous in short Time to be done.
Vorrichtungstechnisch ist wichtig, daß die Ausbrucheinrichtung aus mindestens einem kleinformatigen, jeweils zumindest eine das Feuerfestmaterial brechende oder abtragende Werkzeugschneide aufweisenden Preßluft- oder Hydraulikkammer gebildet ist, welcher Hammer über dem Durchbruchquerschnitt senkrecht zu dessen Axrichtung vorzugswiese rotierend bewegbar ist.In terms of device technology, it is important that the breakout device consists of at least a small format, at least one that refracts the refractory material or abrasive compressed air or hydraulic chamber with tool cutting edge which hammer is formed over the opening cross section perpendicular to it Axial direction is preferably rotatable.
Um größere Vortriebsleistungen in die Zustellung bei jeweils geringer Schlagenergie zu erzielen, ist von Vorteil, wenn die Ausbruchsvorrichtung aus mehreren vorzugsweise Preßluft-oder Hydraulikhämmern besteht, die konzentrisch zu einer um die Axe drehbaren Bohreinheit zusammengefaßt sind.In order to achieve greater advance rates in the delivery at lower Achieving impact energy is beneficial when the breakout device is out several preferably pneumatic or hydraulic hammers, which are concentric are combined to form a drilling unit rotatable about the axis.
Für ein präzises Ansetzen an das metallurgische Gefäß und Einbringen der Öffnung in die Ausmauerung kann es günstig sein, wenn die Ausbrucheinrichtung mittels einer in deren Ausrichtung einstellbarer Lafette axial bewegbar ist.For precise attachment to the metallurgical vessel and opening in the lining it can be favorable if the excavation device is by means of an adjustable in its alignment mount is axially movable.
Für ein Zustellen des Abstiches, insbesondere im Hinblick auf einen dafür erforderlichen möglichst geringen Zeitaufwand sowie auf eine hohe Betriebssicherheit hat es sich als vorteilhaft herausgestellt, wenn die Einsetzvorrichtung einen Tragteil mit einem Justier-und/oder Spannteil für eine axiale Ausrichtung von zumindest zwei Loch-oder Rohrsteinen besitzt und die Einsetzvorrichtung mit dem Loch- oder Rohrsteinstapel axfluchtend mit der in die Zustellung eingebrachten Öffnung einrichtbar und der Steinstapel vorzugsweise mittels einer Lafette in die Öffnung einführbar ist. For delivering the rack, especially with regard to one required as little time as possible and to a high Operational safety has proven to be advantageous if the Inserting device a supporting part with an adjusting and / or clamping part for a has axial alignment of at least two perforated or tubular stones and the Insertion device with the stack of perforated or tubular stones axially aligned with that in the Delivery introduced opening can be set up and the stone stack preferably can be inserted into the opening by means of a carriage.
Aus wirtschaftlichen Gründen, aber auch betreffend eine axfluchtende Einstellung kann es vorteilhaft sein, wenn die Ausbrucheinrichtung und die Einsetzvorrichtung mittels derselben Lafette verschiebbar bzw. versetzbar sind.For economic reasons, but also regarding an ax-aligned attitude it can be advantageous if the breakout device and the insertion device are displaceable or displaceable by means of the same carriage.
Wenn jedoch gemäß einer weiteren Ausführungsform vorgesehen, auf einem verfahrbaren Querträger, auf diesem verschiebbar, jeweils eine Ausbrucheinrichtung und eine Einsetzvorrichtung im wesentlichen axparallel angeordnet und in Sequenz an ein metallurgisches Gefaß anstellbar sind, so können insbesondere für großvolumige Gefäße die gesamte Vorrichtung für das Erneuern des Abstiches kurzfristig und genau in die Arbeitsposition eingestellt und innerhalb kleiner Zeitspannen ein Austausch des Lochauskleidungsteiles vorgenommen werden.However, if provided according to a further embodiment, on a movable cross member, slidable on this, one each Breakout device and an insertion device essentially axially parallel arranged and in sequence on a metallurgical vessel, so can, especially for large-volume vessels, the entire device for the Renewing the racking at short notice and precisely in the working position and within a short period of time, an exchange of the perforated lining part be made.
Im folgenden soll die Erfindung anhand von jeweils lediglich einen Ausführungsweg
darstellende Zeichnungen näher erläutert werden. Es zeigt
Aus Fig. 1 ist eine Ausbrucheinrichtung 1 entnehmbar, welche eine Bohreinheit 20
besitzt, die auf einer Lafette 3 verschiebbar angeordnet ist. Die Bohreinheit 20
besteht aus einer Vielzahl von kleinen Preßlufthämmem 2, 2',2", welche jeweils
Werkzeuge mit einer Schneide 21, 21' tragen. Als Schutz und als Führungsmittel für
die Bohreinheit 20 ist ein diese umschließender Rohrkörper vorgesehen. Durch
einen Antrieb 11 kann eine Drehbewegung der Bohreinheit 20 vorgenommen
werden.An excavation device 1 can be seen from FIG. 1, which has a
Aus der Draufsicht gemäß Fig. 1a ist ersichtlich, daß die auf einer Lafette 3
verschiebbare Bohreinheit 20 vier Werkzeuge mit jeweils einer Werkzeugschneide
21 in Kreuzform besitzt.From the top view according to FIG. 1a it can be seen that the on a carriage 3rd
sliding
In Fig. 2 ist eine Einsetzvorrichtung 5 dargestellt, welche auf einer Lafette 3'
verfahrbar angeordnet ist. Auf einem Tragteil 52 , der mit einem Justier-oder
Spannteil 53 in Wirkverbindung steht, sind Loch- oder Rohrsteine 51 übereinander
zu einem Rohrsteinstapel 50 geformt.In Fig. 2, an
In Fig. 3a bis 3c ist schematisch der Vorgang bei einer von innen vorgenommenen
Emeuerung der Feuerfestauskleidung einer Abstichöffnung eines Lichtbogenofens
A mit exzentrischem Bodenabstich dargestellt. Fig. 3a zeigt eine mittels einer
Vorrichtung 33 einrichtbare Lafette 3 für eine Ausbruchvorrichtung 1 mit einer
Bohreinheit 20, welche Werkzeuge mit kleinflächig wirkenden Werkzeugschneiden
21 besitzt. Nach einer axgenauer Ausrichtung der Bohreinheit 20 auf die
Abstichöffnung wird die Einheit an die Zustellung 4, wie der Pfeil zeigt, angestellt
und eine, wie aus Fig. 3b ersichtlich, Bearbeitung bzw. ein zylindrischer Ausbruch
bei einem Drehen der Bohreinheit 20 vorgenommen. Wenn in der Folge eine
Öffnung mit einer durch eine jeweils kleinflächige Abtragung der
Einzelwerkzeugschneiden 21 bei einem Drehen um die Axe der Bohreinheit 20
gebildeten weitgehend glatten Innenoberfläche 42 im Dauerfutter 41 oder in der
Ausmauerung 4 eingebracht ist, kann , wie in Fig. 3c dargestellt, auf einfache Weise
eine Einsetzvorrichtung 5 mit einem Lochsteinstapel 50 mittels eins Hebe-oder
Zugelementes 54, welches am Justier- oder Spannteil 53 der Einsetzvorrichtung 5
einerseits und an der Bohreinheit 20 andererseits befestigt ist, in die Öffnung
eingezogen und vermauert werden.In Fig. 3a to 3c is the process schematically with one made from the inside
Renewal of the refractory lining of a tap hole in an electric arc furnace
A shown with an eccentric bottom cut. 3a shows one by means of a
Fig. 4a bis Fig. 4d veranschaulichen die Wirkungsweise einer erfindungsgemäßen
Vorrichtung bei einer Erneuerung des Abstiches von außen Fig. 4a und Fig. 4b
zeigen jeweils eine Ausbrucheinrichtung 1 und eine Einsetzvorrichtung 5 auf einem
Querträger 6 in einer sogenannten "Parkposition". Fig. 4c und 4d veranschaulichen
die Situation der Ausbrucheinrichtung 1 beim Einbringen einer zylindrischen
Öffnung in eine Feuerfestauskleidung 4 sowie der Einsetzvorrichtung 5 beim
Implantieren eines Lochsteinstapels 50 im Bereich des Dauerfutters 41 der
Auskleidung eines metallurgischen Gefäßes.4a to 4d illustrate the mode of operation of an inventive device
Device when renewing the rack from the outside Fig. 4a and Fig. 4b
each show a breakout device 1 and an
Fig. 5 zeigt eine Ausbrucheinrichtung 1 und eine Einsetzvorrichtung 5, welche in
Pfeilrichtung verschiebbar auf einem verfahrbaren Querträger 6 befestigt sind.Fig. 5 shows a breakout device 1 and an
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT98890343T ATE264490T1 (en) | 1997-12-02 | 1998-11-18 | DEVICE FOR CREATING OR RENEWING A TAP OPENING OF A METALLURGICAL VESSEL |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0204097A AT408964B (en) | 1997-12-02 | 1997-12-02 | METHOD AND DEVICE FOR REPLACING THE LINING OF A TAP OPENING OF METALLURGICAL VESSELS |
AT204097 | 1997-12-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0926458A1 true EP0926458A1 (en) | 1999-06-30 |
EP0926458B1 EP0926458B1 (en) | 2004-04-14 |
Family
ID=3526501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98890343A Expired - Lifetime EP0926458B1 (en) | 1997-12-02 | 1998-11-18 | Device for making or renewing a taphole of a metallurgical furnace |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0926458B1 (en) |
AT (2) | AT408964B (en) |
DE (1) | DE59811196D1 (en) |
ES (1) | ES2217530T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260664A1 (en) * | 2002-12-23 | 2004-07-15 | Degussa Ag | Poker assembly to clean the inner walls of a cylindrical kiln, which can be carried by a crane, has a hydraulic hammer drill mounted to a hammer slide, and a poker tube with a cutting chisel tip |
CN111438350A (en) * | 2020-05-21 | 2020-07-24 | 北京联合荣大工程材料股份有限公司 | Repairing method of ladle working lining brick |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395387A1 (en) * | 1977-06-20 | 1979-01-19 | Roche Andre | Drill suspended from boom - has two rotary tools driven by electric motors whose batteries form part of ballast weight |
EP0065943A1 (en) * | 1981-05-20 | 1982-12-01 | Cockerill Sambre | Process for the rapid drilling of a tap hole allowing for the realization of a refractory lining in the interior of a large-diameter hole |
US4984769A (en) * | 1988-12-23 | 1991-01-15 | Didier-Werke Ag | Tap spout for metallurgical vessels and method of repairing |
JPH06145752A (en) * | 1992-11-16 | 1994-05-27 | Kurosaki Refract Co Ltd | Method for constructing brick of molten steel tapping hole of converter and constructing device using the same |
EP0726439A1 (en) * | 1995-02-13 | 1996-08-14 | Didier-Werke Ag | Process and device for repairing a metallurgical vessel |
US5735647A (en) * | 1996-02-14 | 1998-04-07 | Woodings Industrial Corporation | Tap hole drill for steelmaking vessel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU78209A1 (en) * | 1977-09-30 | 1978-01-23 | ||
GB8302170D0 (en) * | 1983-01-26 | 1983-03-02 | Mds Furnace Services Ltd | Furnace delining apparatus |
GB8722156D0 (en) * | 1987-09-21 | 1987-10-28 | Ims Lycrete Ltd | Treatment of metallurgical vessels |
KR920700296A (en) * | 1989-06-09 | 1992-02-19 | 원본미기재 | Devices for removing worn nozzle walls or nozzle linings from metals |
FR2685653B1 (en) * | 1991-12-31 | 1994-04-01 | Sollac | DEVICE FOR REPAIRING THE INTERIOR COATING OF A CAST HOLE IN PARTICULAR OF A STEEL CONVERTER. |
US5225145A (en) * | 1992-05-15 | 1993-07-06 | Hoogovens Technical Services Canada, Inc. | Apparatus for opening and closing a taphole of a metallurgical furnace |
LU88203A1 (en) * | 1992-12-16 | 1994-09-09 | Wurth Paul Sa | Combined machine for drilling and plugging a tap hole in a shaft furnace |
EP0767022A1 (en) * | 1995-10-02 | 1997-04-09 | Böhler Druckluft und Hydraulik Baugeräte GmbH | Apparatus for changing nozzle bricks |
-
1997
- 1997-12-02 AT AT0204097A patent/AT408964B/en not_active IP Right Cessation
-
1998
- 1998-11-18 ES ES98890343T patent/ES2217530T3/en not_active Expired - Lifetime
- 1998-11-18 EP EP98890343A patent/EP0926458B1/en not_active Expired - Lifetime
- 1998-11-18 AT AT98890343T patent/ATE264490T1/en not_active IP Right Cessation
- 1998-11-18 DE DE59811196T patent/DE59811196D1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395387A1 (en) * | 1977-06-20 | 1979-01-19 | Roche Andre | Drill suspended from boom - has two rotary tools driven by electric motors whose batteries form part of ballast weight |
EP0065943A1 (en) * | 1981-05-20 | 1982-12-01 | Cockerill Sambre | Process for the rapid drilling of a tap hole allowing for the realization of a refractory lining in the interior of a large-diameter hole |
US4984769A (en) * | 1988-12-23 | 1991-01-15 | Didier-Werke Ag | Tap spout for metallurgical vessels and method of repairing |
JPH06145752A (en) * | 1992-11-16 | 1994-05-27 | Kurosaki Refract Co Ltd | Method for constructing brick of molten steel tapping hole of converter and constructing device using the same |
EP0726439A1 (en) * | 1995-02-13 | 1996-08-14 | Didier-Werke Ag | Process and device for repairing a metallurgical vessel |
US5735647A (en) * | 1996-02-14 | 1998-04-07 | Woodings Industrial Corporation | Tap hole drill for steelmaking vessel |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 018, no. 468 (C - 1244) 31 August 1994 (1994-08-31) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260664A1 (en) * | 2002-12-23 | 2004-07-15 | Degussa Ag | Poker assembly to clean the inner walls of a cylindrical kiln, which can be carried by a crane, has a hydraulic hammer drill mounted to a hammer slide, and a poker tube with a cutting chisel tip |
DE10260664B4 (en) * | 2002-12-23 | 2006-10-12 | Degussa Ag | Crane-type, hydraulic pusher device for cleaning rotary kiln interior walls |
CN111438350A (en) * | 2020-05-21 | 2020-07-24 | 北京联合荣大工程材料股份有限公司 | Repairing method of ladle working lining brick |
CN111438350B (en) * | 2020-05-21 | 2021-09-10 | 北京联合荣大工程材料股份有限公司 | Repairing method of ladle working lining brick |
Also Published As
Publication number | Publication date |
---|---|
AT408964B (en) | 2002-04-25 |
DE59811196D1 (en) | 2004-05-19 |
ES2217530T3 (en) | 2004-11-01 |
ATA204097A (en) | 2001-09-15 |
EP0926458B1 (en) | 2004-04-14 |
ATE264490T1 (en) | 2004-04-15 |
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