EP3259085B1 - Method and device for repairing a refractory shell of a metallurgical vessel - Google Patents

Method and device for repairing a refractory shell of a metallurgical vessel Download PDF

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Publication number
EP3259085B1
EP3259085B1 EP15805170.6A EP15805170A EP3259085B1 EP 3259085 B1 EP3259085 B1 EP 3259085B1 EP 15805170 A EP15805170 A EP 15805170A EP 3259085 B1 EP3259085 B1 EP 3259085B1
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EP
European Patent Office
Prior art keywords
mortar
sleeve
dispenser
wall
pipe
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EP15805170.6A
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German (de)
French (fr)
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EP3259085A1 (en
Inventor
Raphael RENGGLI
Damian SCHACHER
Paul Guenther
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Refractory Intellectual Property GmbH and Co KG
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Refractory Intellectual Property GmbH and Co KG
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Priority to PL15805170T priority Critical patent/PL3259085T3/en
Publication of EP3259085A1 publication Critical patent/EP3259085A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/52—Manufacturing or repairing thereof
    • 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
    • C21C5/44—Refractory linings
    • C21C5/445—Lining or repairing the taphole
    • 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
    • F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
    • 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
    • F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes

Definitions

  • the invention relates to a method for repairing a refractory sleeve of a metallurgical vessel according to the preamble of claim 1 or to a device for carrying out the method.
  • Refractory sleeves of the type mentioned at the beginning include the inner sleeves of pouring ladles containing molten metal.
  • the inner sleeve is inserted in a perforated brick of the refractory ladle lining and connects on the outside with the closure plate of a slide closure.
  • the inner sleeve forms the pouring channel of the pouring ladle and is therefore exposed to very strong wear and tear during operation. It is therefore often necessary to replace the worn sleeves with new, intact sleeves.
  • this process is usually very time-consuming, as you first have to break out the worn sleeve, repair the damaged seating surface of the perforated stone and then install the new sleeve so that it is correctly centered in the vessel. This results in long downtimes for the affected vessels.
  • a material feed pipe is provided with an impeller arranged on the front, which is driven by a rotary axis with a motor and deflects the material to be applied outwards to the point to be repaired.
  • the material is thereby deflected through this pipe up to openings in its front end face and to the impeller and by this and conveyed to the outside onto the surface of the spout to be repaired.
  • a device for repairing an opening in which a tubular element is provided with lateral bores, in which a piston accessible from the outside is integrated at one end, by means of which a mortar can be pressed through these bores.
  • the mortar since the mortar is relatively viscous, it can only be distributed with great effort and not evenly from all the holes. In addition, there is no guarantee that it will effectively remain in the container spout and not be partially torn out again after the tubular element has been ejected and subsequently pulled out of the container spout.
  • a repair device is provided with a repair head connected to a pipe and several lines leading through the pipe, sometimes for supplying refractory material, which is pressed against the inner circumferential surface of the spout.
  • a repair head connected to a pipe and several lines leading through the pipe, sometimes for supplying refractory material, which is pressed against the inner circumferential surface of the spout.
  • an expanding pressing tool is arranged on the outer jacket of the repair head.
  • the refractory material is dried and cured by a heating device on the repair head. Due to these multiple functions of this head, a complicated structure is given, which can hardly be implemented with the relatively thin bores and there is also a risk of clogging in this head.
  • the invention is based on the object of creating a method for repairing worn sleeves that ensures operational reliability and dimensional accuracy of the repaired sleeves.
  • the sleeve repair is carried out by mortaring the casting channel of the sleeve with a mortar dispenser which can be pushed into the casting channel in a known manner and which calibrates it over the entire length of the channel when it is withdrawn from the casting channel, the mortar dispenser during the Mortar is rotated coaxially to the pouring channel and after a defined period of time is also pulled out of the pouring channel while rotating.
  • the repair method according to the invention is characterized in that it can be carried out with a relatively small outlay in terms of equipment, because the rotating mortar dispenser accomplishes both the even mortaring of the duct wall and its precise calibration.
  • the method also has the advantage of a minimized expenditure of time, since it can be carried out at a relatively high vessel temperature, and because both the mortar-out and the hardening of the applied mortar mass take place quickly.
  • the process also makes it possible to automate the function of the mortar dispenser and to adapt it to relevant parameters such as the nature of the sleeve or that of the mortar used in each case.
  • the mortar dispenser is rotated at a comparatively fast rotational speed when mortaring out the pouring channel of the sleeve, which is such that the centrifugal force generated injects the mortar mass onto the channel wall of the sleeve with a strong centrifugal effect.
  • the invention also provides that when the rotating mortar dispenser is withdrawn from the pouring channel, the mortar mass sprayed onto the channel wall is stripped off helically with the mortar dispenser, the rotational speed of the mortar dispenser being adjustable depending on the nature of the mortar and the structure and nature of the channel wall. This way the mortar dispenser will deduct facilitated from the pouring channel, and this receives a perfectly smooth inner wall.
  • the invention also provides that the sleeve is mortared out at a sleeve temperature of preferably above 300.degree.
  • the device according to the invention for performing the proposed method is characterized in that the mortar dispenser is formed by a tubular part rotating around the longitudinal axis with radially longitudinally directed lamellae, the length of which corresponds to the length of the pouring channel of the sleeve to be repaired and whose outer diameter defined by the lamellae is equal to the nominal value of the Is dimensioned pouring channel diameter of the sleeve.
  • the mortar mass is evenly thrown out onto the duct wall of the sleeve by the rotating lamellae, so that the duct wall is covered with a compact and well-adhering layer of mortar.
  • the lamellae are slightly convexly curved in the direction of rotation of the tubular part.
  • the lamellae which rotate helically when the device is withdrawn, ensure precise calibration of the pouring channel with a perfectly smooth channel surface.
  • Fig. 1 shows a partial area of a steel pan 1, the spout 2 of which can be provided with a sliding lock, not shown.
  • the steel pan 1 has an outer steel jacket 3 with a refractory lining 4, in which a refractory perforated brick 5 for receiving an inner sleeve 6 made of refractory material is installed.
  • the sleeve repair is carried out according to the invention by mortaring the inner wall 6 'of the sleeve 6 with a mortar dispenser 9 which can be pushed into the pouring channel 7 and through which the mortar is conveyed outwards into a cavity 14 formed between the mortar dispenser 9 and the worn inner wall 6' of the sleeve 6.
  • the sleeve is mortared and calibrated with sufficient adhesive strength over the entire length of the channel.
  • the device 8 is operated according to the invention in such a way that the mortar dispenser 9 rotates relatively quickly for a defined time coaxially with the pouring channel 7 during mortaring and is pulled out of it while the mortar is hardening. In this way, the inner wall 6 'of the restored pouring channel 7 is machined evenly and smoothly, and during pouring it is prevented that melt flowing through is held back due to unevenness and possibly sticking.
  • the speed of rotation of the mortar dispenser 9 corresponds, for example, to that of a hand drill with approximately 500 to 1,000 revolutions per minute.
  • a drive shaft 19 for a rotary drive coupled to the mortar dispenser is shown.
  • the mortar dispenser 9 is rotated for a total of 60 seconds, for example, and if the inner wall of the sleeve is mortared at a sleeve temperature of preferably above 300 ° C. In this way, the sleeve repair can be carried out on the still hot pouring ladle.
  • the speed of rotation of the device can be a function can be adjusted by the nature of the mortar and the structure and nature of the sewer wall.
  • the mortar dispenser 9 consists of a cylindrical pipe part 10 with radially longitudinally directed lamellae 11, the length of the pipe part corresponding to the pouring channel length of the sleeve 6, while its outer diameter defined by the lamellae 11 is equal to the nominal value of the channel diameter of the inner sleeve.
  • the lamellae 11 are aligned axially parallel to the pipe part 10 and delimited at both ends by disc-shaped flanges 12, so that elongated free spaces 13 are formed between the individual lamellae for receiving the refractory mortar.
  • the mortar By rotating the pipe part 10, the mortar is thrown out of the free spaces 13 and evenly applied to the worn inner wall 6 'of the sleeve 6 over the entire length of the channel, the centrifugal effect contributing to the fact that the mortar is firmly attached to the inner wall 6' and the cavity 14 formed can stick in between.
  • the lamellae 11 are slightly convexly curved in the direction of rotation of the pipe part 10, so that the mortar is pushed outwards over the outer edges 11 'formed, and these edges 11' have a cutting effect.
  • the lamellae 11 rotating with the pipe part 10 also serve to strip off the excess mortar and to calibrate the pouring channel of the inner sleeve without damaging the channel wall. This also applies when pulling off the device, because then the rotating one continues Pipe part 10 completes a helical movement, which significantly supports the withdrawal process.
  • These free spaces 13 of the mortar dispenser 9 are advantageously dimensioned in such a way that a predetermined amount of mortar can be poured into it, for example by hand, which approximately corresponds to the cavity 14 formed between the mortar dispenser and the inner wall of the sleeve, so that such stripping of the mortar is made possible.
  • These free spaces 13 are therefore filled with mortar in such a way that this mortar is filled approximately flush with the outer circumference of the lamellae 11 and is evenly distributed in the process.
  • the sleeve repair method according to the invention is particularly suitable for casting systems in which the maintenance and delivery of the sliding closure of the pans is carried out centrally by means of a robot in a maintenance station, the so-called pan area.
  • Fig. 4 shows the spout of a pouring ladle 1 located in the maintenance station, in the perforated brick 5 of which an inner sleeve 6 is inserted.
  • a sliding closure 20, known per se, for closing and opening the pouring channel 7 is connected to the latter.
  • the wear zone 15 extends from the free passage area of the perforated brick 5 to the exit of the inner sleeve 6, with a fireproof closure plate (not shown) in the housing 21 of the slide closure 20 tightly adjoining this there.
  • the ladle 1 is in Fig. 4 in the maintenance position, in which it is laid horizontally.
  • the slide lock 20 is partially in Section with the refractory components that can be used in its mechanics, namely the closure plate, the slide plate and the pouring sleeve.
  • the sleeve 6 of the pouring ladle is freely accessible after the slide unit 16 of the slide lock has been pivoted out and the base plate has been removed, and can be repaired in the maintenance station while the maintenance and delivery of the slide lock is being carried out. The repair is done automatically there, preferably with the robot used to change plates.
  • a suitable repair device 17 is shown. It differs from the device 8 according to Fig. 2 only in that it has a second pipe part 18 of a mortar supply device provided as an extension to the pipe part 10 for coupling the device to the robot, which pipe part can simultaneously serve to supply the other pipe part 10 with mortar.
  • the repair device 17 is automatically and precisely positioned with the robot and driven via its drive shaft 19 in such a way that it is rotated in the pouring channel 7 at the optimum rotational speed in each case.
  • the device according to the invention can readily be designed differently than in the exemplary embodiment described. The only thing that matters is that it works as described above.
  • the sleeve repair method according to the invention is of course also suitable for other sleeves which are fastened in a refractory vessel lining and are exposed to severe wear there, such as those in a tapping of a converter, an electric furnace, or in a tundish.
  • Perforated stones, sleeve inserts, Free-wheeling nozzles or sleeve-shaped injected channels as sleeves can be repaired with the method according to the invention.
  • the method is particularly advantageous for repairing the inner sleeves of pouring ladles, because it offers the possibility of quickly repairing the inner sleeve in the course of the automation of the casting operation with every plate change and thus reducing the need for new inner sleeves. There is no need to clean the perforated stone when changing the case. The wear and tear on the perforated brick is reduced and there is no disruptive sintering.
  • lamellas instead of lamellas, other-shaped means delimiting the free spaces, for example thread-like elevations, could also be provided on the pipe part of the mortar dispenser.
  • this conveying of the mortar to the inner wall of a sleeve could also take place by pushing it outwards, for example by means of a cylindrical inflatable balloon-like body or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Reparatur einer feuerfesten Hülse eines metallurgischen Gefässes nach dem Oberbegriff des Anspruchs 1 bzw. einer Vorrichtung zum Durchführen des Verfahrens.The invention relates to a method for repairing a refractory sleeve of a metallurgical vessel according to the preamble of claim 1 or to a device for carrying out the method.

Feuerfeste Hülsen der eingangs genannten Art sind u.a. die Innenhülsen von Metallschmelze enthaltenden Giesspfannen. Die Innenhülse ist in einem Lochstein der feuerfesten Pfannenauskleidung eingesetzt und schliesst aussen an die Verschlussplatte eines Schiebeverschlusses an. Die Innenhülse bildet den Ausgusskanal der Giesspfanne und ist daher im Betrieb einem sehr starken Verschleiss ausgesetzt. Es ist daher des Öfteren erforderlich, die verschlissenen Hülsen durch neue unversehrte Hülsen zu ersetzen. Dieser Vorgang ist jedoch normalerweise sehr aufwändig, da man zunächst die verschlissene Hülse herausbrechen, die beschädigte Sitzfläche des Lochsteins ausbessern und anschliessend die neue Hülse so einbauen muss, dass sie richtig im Gefäss zentriert ist. Daraus ergeben sich lange Ausfallzeiten für die davon betroffenen Gefässe.Refractory sleeves of the type mentioned at the beginning include the inner sleeves of pouring ladles containing molten metal. The inner sleeve is inserted in a perforated brick of the refractory ladle lining and connects on the outside with the closure plate of a slide closure. The inner sleeve forms the pouring channel of the pouring ladle and is therefore exposed to very strong wear and tear during operation. It is therefore often necessary to replace the worn sleeves with new, intact sleeves. However, this process is usually very time-consuming, as you first have to break out the worn sleeve, repair the damaged seating surface of the perforated stone and then install the new sleeve so that it is correctly centered in the vessel. This results in long downtimes for the affected vessels.

Es ist zwar aus dem Patent AT-A-242 175 ein Verfahren zur Ausbesserung von Abstichlöchern metallurgischer Gefässe bekannt, das mit einem in das Abstichloch einführbaren Rohrteil als Mörtelspender durchgeführt wird. Das bekannte Verfahren ist aber zum Reparieren von Ausgusshülsen ungeeignet, weil das als Mörtelspender dienende Rohrteil um den Umfang verteilte Bohrungen aufweist und exakt den gleichen Aussendurchmesser hat wie der Solldurchmesser des auszubessernden Ausgusses. Das hat zum einen zur Folge, dass der Mörtel nicht gleichmässig auf die beschädigte Kanalwand aufgebracht wird, und zum anderen, dass nach Ausmörteln des Ausgusses die Gefahr besteht, dass beim Abziehen des perforierten Rohrteils die aufgetragene Mörtelschicht beschädigt wird.It's from the patent though AT-A-242 175 a method for repairing tap holes in metallurgical vessels is known, which is carried out with a pipe part which can be inserted into the tap hole as a mortar dispenser. The known method is unsuitable for repairing pouring sleeves because the pipe part serving as a mortar dispenser has bores distributed around the circumference and has exactly the same outer diameter as the nominal diameter of the pouring pouring to be repaired. As a result, on the one hand, the mortar is not applied evenly to the damaged duct wall and, on the other hand, after mortaring the spout, there is a risk that the applied mortar layer will be damaged when the perforated pipe section is pulled off.

Bei einem Verfahren zum Reparieren eines verschlissenen konischen Bereichs eines Metallschmelze enthaltenden Behälters gemäss der Druckschrift US-A-5,259,880 ist ein Materialzuführungsrohr mit einem frontseitig angeordneten Flügelrad vorgesehen, welches durch eine Drehachse mit einem Motor angetrieben wird und aufzutragendes Material nach aussen auf die zu reparierenden Stelle umlenkt. Das Material wird dabei durch dieses Rohr bis zu Öffnungen bei seiner vorderen Stirnseite und zu dem Flügelrad und von diesem umgelenkt und nach aussen auf die zu reparierende Oberfläche des Ausgusses befördert. Damit kann nur ein beschränktes und unkontrolliertes Auftragen dieses Materials erfolgen, weil mit diesem Flügelrad annähernd nur ein dünner Ring auftragbar ist.In a method for repairing a worn conical area of a container containing molten metal according to the document US-A-5,259,880 a material feed pipe is provided with an impeller arranged on the front, which is driven by a rotary axis with a motor and deflects the material to be applied outwards to the point to be repaired. The material is thereby deflected through this pipe up to openings in its front end face and to the impeller and by this and conveyed to the outside onto the surface of the spout to be repaired. This means that this material can only be applied in a limited and uncontrolled manner, because only a thin ring can be applied with this impeller.

In der Druckschrift BE-A-1 002 746 ist eine Vorrichtung zum Reparieren einer Öffnung offenbart, bei der ein Rohrelement mit seitlichen Bohrungen versehen ist, bei dem am einen Ende ein von der Aussenseite zugänglicher Kolben integriert ist, mittels dem ein Mörtel durch diese Bohrungen gedrückt werden kann. Da aber der Mörtel relativ zähflüssig ist, kann er nur mit viel Kraftaufwand und nicht gleichmässig aus allen Bohrungen verteilt werden. Zudem ist nicht gewährleistet, dass er nach dem Ausstossen und dem anschliessenden Herausziehen des Rohrelementes aus dem Behälterausguss effektiv in diesem verbleibt und nicht wieder partiell herausgerissen wird.In the pamphlet BE-A-1 002 746 a device for repairing an opening is disclosed in which a tubular element is provided with lateral bores, in which a piston accessible from the outside is integrated at one end, by means of which a mortar can be pressed through these bores. However, since the mortar is relatively viscous, it can only be distributed with great effort and not evenly from all the holes. In addition, there is no guarantee that it will effectively remain in the container spout and not be partially torn out again after the tubular element has been ejected and subsequently pulled out of the container spout.

In der Druckschrift JP-A-1-119614 ist eine Reparaturvorrichtung mit einem mit einem Rohr verbundenen Reparaturkopf und mehreren durch das Rohr führenden Leitungen mitunter zum Zuführen von Feuerfestmaterial vorgesehen, welches an die innere Umfangsfläche des Ausgusses gepresst wird. Dazu ist ein sich dehnendes Presswerkzeug am Aussenmantel des Reparaturkopfes angeordnet. Ausserdem wird das Feuerfestmaterial durch eine Heizeinrichtung am Reparaturkopf getrocknet und ausgehärtet. Durch diese mehreren Funktionen dieses Kopfes ist ein komplizierter Aufbau gegeben, welcher bei den relativ dünnen Bohrungen kaum realisierbar ist und eine Verstopfungsgefahr in diesem ebenso gegeben ist.In the pamphlet JP-A-1-119614 a repair device is provided with a repair head connected to a pipe and several lines leading through the pipe, sometimes for supplying refractory material, which is pressed against the inner circumferential surface of the spout. For this purpose, an expanding pressing tool is arranged on the outer jacket of the repair head. In addition, the refractory material is dried and cured by a heating device on the repair head. Due to these multiple functions of this head, a complicated structure is given, which can hardly be implemented with the relatively thin bores and there is also a risk of clogging in this head.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Reparieren von verschlissenen Hülsen zu schaffen, dass mit diesem die Betriebssicherheit und Massgenauigkeit der ausgebesserten Hülsen gewährleistet ist.The invention is based on the object of creating a method for repairing worn sleeves that ensures operational reliability and dimensional accuracy of the repaired sleeves.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Hülsenreparatur durch Ausmörteln des Giesskanals der Hülse mit einem in den Giesskanal in an sich bekannter Weise einschiebbaren Mörtelspender durchgeführt wird, der beim Abzug desselben aus dem Giesskanal ihn über die gesamte Kanallänge kalibriert, wobei der Mörtelspender während des Ausmörtelns koaxial zum Giesskanal rotiert wird und nach einer definierten Zeit ebenfalls rotierend aus dem Giesskanal gezogen wird.This object is achieved according to the invention in that the sleeve repair is carried out by mortaring the casting channel of the sleeve with a mortar dispenser which can be pushed into the casting channel in a known manner and which calibrates it over the entire length of the channel when it is withdrawn from the casting channel, the mortar dispenser during the Mortar is rotated coaxially to the pouring channel and after a defined period of time is also pulled out of the pouring channel while rotating.

Das erfindungsgemässe Reparaturverfahren zeichnet sich dadurch aus, dass es mit einem verhältnismässig kleinen apparativen Aufwand durchführbar ist, weil der rotierende Mörtelspender sowohl das gleichmässige Ausmörteln der Kanalwand als auch ihre genaue Kalibrierung bewerkstelligt.The repair method according to the invention is characterized in that it can be carried out with a relatively small outlay in terms of equipment, because the rotating mortar dispenser accomplishes both the even mortaring of the duct wall and its precise calibration.

Das Verfahren hat auch den Vorteil eines minimierten Zeitaufwandes, da er schon bei einer noch relativ hohen Gefässtemperatur durchführbar ist, und weil sowohl das Ausmörteln als auch das Aushärten der aufgebrachten Mörtelmasse schnell erfolgt.The method also has the advantage of a minimized expenditure of time, since it can be carried out at a relatively high vessel temperature, and because both the mortar-out and the hardening of the applied mortar mass take place quickly.

Das Verfahren ermöglicht zudem, die Funktion des Mörtelspenders zu automatisieren und an massgebliche Parameter, wie die Beschaffenheit der Hülse oder die des jeweils eingesetzten Mörtels, anzupassen.The process also makes it possible to automate the function of the mortar dispenser and to adapt it to relevant parameters such as the nature of the sleeve or that of the mortar used in each case.

Diese Vorteile kommen insbesondere zum Tragen, wenn das erfindungsgemässe Verfahren zum Ausbessern der Innenhülse einer Giesspfanne mit einem an den Pfannenausguss anschliessenden Schiebeverschluss angewandt wird, dessen Wartung automatisch mit einem Roboter in einer Wartungsstation der Giessanlage durchgeführt wird. Die Erfindung sieht in diesem Fall vor, dass die Reparatur der Innenhülse auch dort ebenfalls automatisch während der Wartung des Schiebeverschlusses, vorzugsweise mit demselben Roboter, durchgeführt wird.These advantages come into play in particular when the method according to the invention for repairing the inner sleeve of a pouring ladle is used with a sliding closure connected to the pouring spout, the maintenance of which is carried out automatically by a robot in a maintenance station of the pouring system. The invention sees In this case, the repair of the inner sleeve is also carried out there automatically during the maintenance of the sliding closure, preferably with the same robot.

Auf diese Weise ist es möglich, die Innenhülse bei jedem Plattenwechsel während des Wechselvorgangs zu reparieren, statt sie schon nach einer kurzen Anzahl Abgüsse durch eine neue Hülse zu ersetzen. Dadurch werden die Kosten des feuerfesten Materials herabgesetzt und der Zeitaufwand für die Instandhaltung der Pfanne minimiert.In this way, it is possible to repair the inner sleeve every time the plate is changed during the exchange process, instead of replacing it with a new sleeve after a short number of casts. This reduces the cost of the refractory material and minimizes the time required to maintain the ladle.

Es ist in diesem Sinne vorteilhaft, wenn beim Ausmörteln des Giesskanals der Hülse der Mörtelspender mit einer verhältnismässig schnellen Drehgeschwindigkeit rotiert wird, die so bemessen ist, dass durch die erzeugte Fliehkraft die Mörtelmasse mit einem starken Schleudereffekt auf die Kanalwand der Hülse gespritzt wird.In this sense, it is advantageous if the mortar dispenser is rotated at a comparatively fast rotational speed when mortaring out the pouring channel of the sleeve, which is such that the centrifugal force generated injects the mortar mass onto the channel wall of the sleeve with a strong centrifugal effect.

Es ist ebenfalls zur besseren Anhaftung des Mörtels zweckmässig, wenn der Mörtelspender auch nach Beginn des Aushärtungsprozesses des Mörtels für eine bestimmte, von der Beschaffenheit des Mörtels abhängige Zeitdauer gedreht wird.It is also useful for better adhesion of the mortar if the mortar dispenser is rotated for a certain period of time, depending on the nature of the mortar, even after the mortar has started to harden.

Die Erfindung sieht ferner vor, dass beim Abziehen des rotierenden Mörtelspenders aus dem Giesskanal die auf die Kanalwand gespritzte Mörtelmasse schraubenförmig mit dem Mörtelspender abgestreift wird, wobei die Drehgeschwindigkeit des Mörtelspenders in Abhängigkeit von der Beschaffenheit des Mörtels sowie der Struktur und Beschaffenheit der Kanalwand einstellbar ist. Auf diese Weise wird der Abzug des Mörtelspenders aus dem Giesskanal erleichtert, und dieser erhält gleichzeitig eine einwandfrei glatte Innenwand.The invention also provides that when the rotating mortar dispenser is withdrawn from the pouring channel, the mortar mass sprayed onto the channel wall is stripped off helically with the mortar dispenser, the rotational speed of the mortar dispenser being adjustable depending on the nature of the mortar and the structure and nature of the channel wall. This way the mortar dispenser will deduct facilitated from the pouring channel, and this receives a perfectly smooth inner wall.

Um das Aufbringen und Glätten der Mörtelmasse zu optimieren, sieht die Erfindung auch vor, dass das Ausmörteln der Hülse bei einer Hülsentemperatur von vorzugsweise über 300°C durchgeführt wird.In order to optimize the application and smoothing of the mortar mass, the invention also provides that the sleeve is mortared out at a sleeve temperature of preferably above 300.degree.

Die erfindungsgemässe Vorrichtung zum Durchführen des vorgeschlagenen Verfahrens zeichnet sich dadurch aus, dass der Mörtelspender durch einen um die Längsachse rotierenden Rohrteil mit radial längsgerichteten Lamellen gebildet ist, dessen Länge der Giesskanallänge der zur reparierenden Hülse entspricht und dessen von den Lamellen definierte Aussendurchmesser gleich dem Sollwert des Giesskanaldurchmessers der Hülse bemessen ist.The device according to the invention for performing the proposed method is characterized in that the mortar dispenser is formed by a tubular part rotating around the longitudinal axis with radially longitudinally directed lamellae, the length of which corresponds to the length of the pouring channel of the sleeve to be repaired and whose outer diameter defined by the lamellae is equal to the nominal value of the Is dimensioned pouring channel diameter of the sleeve.

Beim Ausmörteln wird die Mörtelmasse durch die rotierenden Lamellen auf die Kanalwand der Hülse gleichmässig ausgeschleudert, so dass die Kanalwand mit einer kompakten und gut anhaftenden Mörtelschicht belegt wird. Es ist in diesem Sinne vorteilhaft, wenn die Lamellen in Drehrichtung des Rohrteils leicht konvex gekrümmt sind.When mortaring, the mortar mass is evenly thrown out onto the duct wall of the sleeve by the rotating lamellae, so that the duct wall is covered with a compact and well-adhering layer of mortar. In this sense, it is advantageous if the lamellae are slightly convexly curved in the direction of rotation of the tubular part.

Die beim Abzug der Vorrichtung schraubenförmig rotierenden Lamellen bewirken eine genaue Kalibrierung des Giesskanals mit einer einwandfrei glatten Kanalfläche.The lamellae, which rotate helically when the device is withdrawn, ensure precise calibration of the pouring channel with a perfectly smooth channel surface.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigen:

Fig. 1
einen Pfannenausguss mit einer Vorrichtung zum Reparieren der Innenhülse nach dem erfindungsgemässen Verfahren, als Schnitt schematisch dargestellt;
Fig. 2
die Vorrichtung nach Fig. 1 in perspektivischer Ansicht;
Fig. 3
einen Schnitt der Vorrichtung nach Fig. 2 sowie der Innenhülse;
Fig. 4
einen abgewinkelten Schnitt eines Pfannenausgusses mit einem an die Innenhülse anschliessenden Schiebeverschluss am Pfannenplatz einer Giessanlage; und
Fig. 5
eine perspektivische Ansicht einer Variante der Vorrichtung.
The invention is explained in more detail below using an exemplary embodiment with reference to the drawing. Show it:
Fig. 1
a socket outlet with a device for repairing the inner sleeve according to the inventive method, shown schematically as a section;
Fig. 2
the device after Fig. 1 in perspective view;
Fig. 3
a section of the device according to Fig. 2 as well as the inner sleeve;
Fig. 4
an angled section of a ladle spout with a sliding closure adjoining the inner sleeve at the ladle space of a casting plant; and
Fig. 5
a perspective view of a variant of the device.

Fig. 1 zeigt einen Teilbereich einer Stahlpfanne 1, deren Ausguss 2 mit einem nicht gezeigten Schiebeverschluss versehen sein kann. Die Stahlpfanne 1 weist einen äusseren Stahlmantel 3 mit einer feuerfesten Auskleidung 4 auf, in der ein feuerfester Lochstein 5 zur Aufnahme einer Innenhülse 6 aus feuerfestem Material eingebaut ist. Fig. 1 shows a partial area of a steel pan 1, the spout 2 of which can be provided with a sliding lock, not shown. The steel pan 1 has an outer steel jacket 3 with a refractory lining 4, in which a refractory perforated brick 5 for receiving an inner sleeve 6 made of refractory material is installed.

Im Betrieb ist die Hülse 6 bei ihrer Innenwand 6' im Bereich des Giesskanals 7 einem starken Verschleiss ausgesetzt. Aus diesem Grund ist sie nach einer bestimmten Anzahl Abgüsse nicht mehr betriebsfähig.During operation, the inner wall 6 ′ of the sleeve 6 in the region of the pouring channel 7 is exposed to severe wear. For this reason, it is no longer operational after a certain number of casts.

Die Hülsenreparatur erfolgt erfindungsgemäss durch Ausmörteln der Innenwand 6' der Hülse 6 mit einem in den Giesskanal 7 einschiebbaren Mörtelspender 9, durch welchen der Mörtel nach aussen in einen gebildeten Hohlraum 14 zwischen Mörtelspender 9 und der verschlissenen Innenwand 6' der Hülse 6 befördert wird.The sleeve repair is carried out according to the invention by mortaring the inner wall 6 'of the sleeve 6 with a mortar dispenser 9 which can be pushed into the pouring channel 7 and through which the mortar is conveyed outwards into a cavity 14 formed between the mortar dispenser 9 and the worn inner wall 6' of the sleeve 6.

Nach dem anschliessendem Abzug des Mörtelspenders aus dem Giesskanal 7 ist die Hülse über die gesamte Kanallänge mit ausreichender Haftfestigkeit gemörtelt und kalibriert.After the mortar dispenser has subsequently been withdrawn from the pouring channel 7, the sleeve is mortared and calibrated with sufficient adhesive strength over the entire length of the channel.

Die Vorrichtung 8 wird erfindungsgemäss so betätigt, dass der Mörtelspender 9 während der Ausmörtelung verhältnismässig schnell für eine definierte Zeit koaxial zum Giesskanal 7 rotiert und aus diesem ebenfalls rotierend während der Aushärtung des Mörtels herausgezogen wird. Damit wird die Innenwand 6' des wiederhergestellten Giesskanals 7 gleichmässig glatt bearbeitet und es wird beim Abgiessen verhindert, dass durchfliessende Schmelze wegen Unebenheiten zurückgehalten wird und möglicherweise anklebt.The device 8 is operated according to the invention in such a way that the mortar dispenser 9 rotates relatively quickly for a defined time coaxially with the pouring channel 7 during mortaring and is pulled out of it while the mortar is hardening. In this way, the inner wall 6 'of the restored pouring channel 7 is machined evenly and smoothly, and during pouring it is prevented that melt flowing through is held back due to unevenness and possibly sticking.

Die Drehgeschwindigkeit des Mörtelspenders 9 entspricht beispielsweise einer solchen einer Handbohrmaschine mit ca. 500 bis 1'000 Umdrehungen pro Minute. Es ist ein mit dem Mörtelspender gekoppelte Antriebswelle 19 für einen Drehantrieb gezeigt.The speed of rotation of the mortar dispenser 9 corresponds, for example, to that of a hand drill with approximately 500 to 1,000 revolutions per minute. A drive shaft 19 for a rotary drive coupled to the mortar dispenser is shown.

Es wurde bei diesbezüglichen Versuchen festgestellt, dass es vorteilhaft ist, wenn der Mörtelspender 9 insgesamt beispielsweise 60 Sekunden gedreht wird, und wenn das Ausmörteln der Innenwand der Hülse bei einer Hülsentemperatur von vorzugsweise über 300°C durchgeführt wird. Dadurch kann die Hülsenreparatur an der noch heissen Giesspfanne durchgeführt werden.It has been found in tests in this regard that it is advantageous if the mortar dispenser 9 is rotated for a total of 60 seconds, for example, and if the inner wall of the sleeve is mortared at a sleeve temperature of preferably above 300 ° C. In this way, the sleeve repair can be carried out on the still hot pouring ladle.

Zum Reparieren der Innenhülse nach dem erfindungsgemässen Verfahren kommen die zu ähnlichen Zwecken gebräuchlichen Mörtelsorten in Betracht. Die Drehgeschwindigkeit der Vorrichtung kann in Abhängigkeit von der Beschaffenheit des Mörtels sowie der Struktur und Beschaffenheit der Kanalwand eingestellt werden.For repairing the inner sleeve according to the method according to the invention, the types of mortar commonly used for similar purposes come into consideration. The speed of rotation of the device can be a function can be adjusted by the nature of the mortar and the structure and nature of the sewer wall.

Wie aus Fig. 2 und Fig. 3 ersichtlich ist, besteht der Mörtelspender 9 aus einem zylindrischen Rohrteil 10 mit radial längsgerichteten Lamellen 11, wobei die Länge des Rohrteils der Giesskanallänge der Hülse 6 entspricht, während dessen von den Lamellen 11 definierte Aussendurchmesser gleich dem Sollwert des Kanaldurchmessers der Innenhülse bemessen ist. Beim beschriebenen Ausführungsbeispiel sind die Lamellen 11 achsparallel zum Rohrteil 10 ausgerichtet und an beiden Enden durch scheibenförmige Flansche 12 abgegrenzt, so dass zwischen den einzelnen Lamellen längliche Freiräume 13 zur Aufnahme des feuerfesten Mörtels gebildet werden.How out FIGS. 2 and 3 As can be seen, the mortar dispenser 9 consists of a cylindrical pipe part 10 with radially longitudinally directed lamellae 11, the length of the pipe part corresponding to the pouring channel length of the sleeve 6, while its outer diameter defined by the lamellae 11 is equal to the nominal value of the channel diameter of the inner sleeve. In the embodiment described, the lamellae 11 are aligned axially parallel to the pipe part 10 and delimited at both ends by disc-shaped flanges 12, so that elongated free spaces 13 are formed between the individual lamellae for receiving the refractory mortar.

Durch Rotieren des Rohrteils 10 wird der Mörtel aus den Freiräumen 13 ausgeschleudert und auf die verschlissene Innenwand 6' der Hülse 6 über die gesamte Kanallänge gleichmässig aufgetragen, wobei der Schleudereffekt dazu beiträgt, dass der Mörtel fest an der Innenwand 6'und dem gebildeten Hohlraum 14 dazwischen anhaften kann. Um diesen Schleudereffekt zu steigern, ist es vorteilhaft, wenn die Lamellen 11 in Drehrichtung des Rohrteils 10 leicht konvex gekrümmt sind, so dass der Mörtel über die gebildeten äusseren Kanten 11' weg nach aussen gedrückt wird, und diese Kanten 11' schneidend wirken.By rotating the pipe part 10, the mortar is thrown out of the free spaces 13 and evenly applied to the worn inner wall 6 'of the sleeve 6 over the entire length of the channel, the centrifugal effect contributing to the fact that the mortar is firmly attached to the inner wall 6' and the cavity 14 formed can stick in between. In order to increase this slinging effect, it is advantageous if the lamellae 11 are slightly convexly curved in the direction of rotation of the pipe part 10, so that the mortar is pushed outwards over the outer edges 11 'formed, and these edges 11' have a cutting effect.

Die mit dem Rohrteil 10 mitrotierenden Lamellen 11 dienen auch zum Abstreifen des überschüssigen Mörtels und zum Kalibrieren des Giesskanals der Innenhülse, ohne dass dabei die Kanalwand beschädigt wird. Das gilt auch beim Abziehen der Vorrichtung, weil dann der weiter rotierende Rohrteil 10 eine schraubenförmige Bewegung vollzieht, die den Abzugsvorgang erheblich unterstützt.The lamellae 11 rotating with the pipe part 10 also serve to strip off the excess mortar and to calibrate the pouring channel of the inner sleeve without damaging the channel wall. This also applies when pulling off the device, because then the rotating one continues Pipe part 10 completes a helical movement, which significantly supports the withdrawal process.

Vorteilhaft sind diese Freiräume 13 des Mörtelspenders 9 so bemessen, dass eine vorbestimmte Mörtelmenge beispielsweise von Hand darin eingefüllt werden kann, die annähernd dem gebildeten Hohlraum 14 zwischen dem Mörtelspender und der Innenwand der Hülse entspricht, so dass ein solches Abstreifen der Ausmörtelung ermöglicht wird. Diese Freiräume 13 werden daher so mit Mörtel gefüllt, dass dieser Mörtel annähernd bündig zum Aussenumfang der Lamellen 11 gefüllt und dabei gleichmässig verteilt wird.These free spaces 13 of the mortar dispenser 9 are advantageously dimensioned in such a way that a predetermined amount of mortar can be poured into it, for example by hand, which approximately corresponds to the cavity 14 formed between the mortar dispenser and the inner wall of the sleeve, so that such stripping of the mortar is made possible. These free spaces 13 are therefore filled with mortar in such a way that this mortar is filled approximately flush with the outer circumference of the lamellae 11 and is evenly distributed in the process.

Das erfindungsgemässe Hülsenreparaturverfahren eignet sich insbesondere bei Giessanlagen, in denen die Wartung und Zustellung des Schiebeverschlusses der Pfannen zentral mittels eines Roboters in einer Wartungsstation, dem sogenannten Pfannenplatz, durchgeführt wird.The sleeve repair method according to the invention is particularly suitable for casting systems in which the maintenance and delivery of the sliding closure of the pans is carried out centrally by means of a robot in a maintenance station, the so-called pan area.

Fig. 4 zeigt den Ausguss einer in der Wartungsstation befindlichen Giesspfanne 1, in deren Lochstein 5 eine innere Hülse 6 eingesetzt ist. An letztere ist ein an sich bekannter Schiebeverschluss 20 zum Schliessen und Öffnen des Giesskanals 7 angeschlossen. Im Betrieb erstreckt sich die Verschleisszone 15 vom freien Durchlassbereich des Lochsteins 5 bis zum Ausgang der Innenhülse 6, wobei an diese dort eine nicht gezeigte feuerfeste Verschlussplatte in das Gehäuse 21 des Schiebeverschlusses 20 dicht anschliesst. Fig. 4 shows the spout of a pouring ladle 1 located in the maintenance station, in the perforated brick 5 of which an inner sleeve 6 is inserted. A sliding closure 20, known per se, for closing and opening the pouring channel 7 is connected to the latter. In operation, the wear zone 15 extends from the free passage area of the perforated brick 5 to the exit of the inner sleeve 6, with a fireproof closure plate (not shown) in the housing 21 of the slide closure 20 tightly adjoining this there.

Die Giesspfanne 1 befindet sich in Fig. 4 in Wartungsstellung, in welcher sie waagerecht hingelegt ist. Der Schiebeverschluss 20 ist teilweise im Schnitt mit den in seiner Mechanik einsetzbaren feuerfesten Bestandteile, nämlich die Verschlussplatte, die Schieberplatte und die Ausgusshülse, dargestellt. Die Hülse 6 der Giesspfanne ist nach Ausschwenken der Schiebereinheit 16 des Schiebeverschlusses und dem Wegnehmen der Bodenplatte frei zugänglich, und kann in der Wartungsstation repariert werden, während die Wartung und Zustellung des Schiebeverschlusses durchgeführt wird. Die Reparatur erfolgt dort automatisch, vorzugsweise mit dem für den Plattenwechsel verwendeten Roboter.The ladle 1 is in Fig. 4 in the maintenance position, in which it is laid horizontally. The slide lock 20 is partially in Section with the refractory components that can be used in its mechanics, namely the closure plate, the slide plate and the pouring sleeve. The sleeve 6 of the pouring ladle is freely accessible after the slide unit 16 of the slide lock has been pivoted out and the base plate has been removed, and can be repaired in the maintenance station while the maintenance and delivery of the slide lock is being carried out. The repair is done automatically there, preferably with the robot used to change plates.

In Fig. 5 ist eine dafür geeignete Reparaturvorrichtung 17 dargestellt. Sie unterscheidet sich von der Vorrichtung 8 nach Fig. 2 lediglich dadurch, dass sie zum Ankoppeln der Vorrichtung an den Roboter einen zweiten als Verlängerung zum Rohrteil 10 vorgesehener Rohrteil 18 einer Mörtelzufuhreinrichtung aufweist, welche gleichzeitig zum Versorgen des anderen Rohrteils 10 mit Mörtel dienen kann. Die Reparaturvorrichtung 17 wird automatisch mit dem Roboter genau positioniert und über ihre Antriebswelle 19 so angetrieben, dass sie im Giesskanal 7 mit der jeweils optimalen Drehgeschwindigkeit gedreht wird.In Fig. 5 a suitable repair device 17 is shown. It differs from the device 8 according to Fig. 2 only in that it has a second pipe part 18 of a mortar supply device provided as an extension to the pipe part 10 for coupling the device to the robot, which pipe part can simultaneously serve to supply the other pipe part 10 with mortar. The repair device 17 is automatically and precisely positioned with the robot and driven via its drive shaft 19 in such a way that it is rotated in the pouring channel 7 at the optimum rotational speed in each case.

Die erfindungsgemässe Vorrichtung kann ohne weiteres anders als im beschriebenen Ausführungsbeispiel ausgeführt werden. Entscheidend ist es nur, dass sie wie vorstehend beschrieben funktioniert.The device according to the invention can readily be designed differently than in the exemplary embodiment described. The only thing that matters is that it works as described above.

Das erfindungsgemässe Hülsenreparaturverfahren eignet sich selbstverständlich auch für andere Hülsen, die in einer feuerfesten Gefässauskleidung befestigt und dort einem starken Verschleiss ausgesetzt sind, wie zum Beispiel für solche in einem Abstich eines Konverters, eines Elektroofens, oder in einem Tundish. Es könnten auch Lochsteine, Hülseneinsätze, Freilaufdüsen oder hülsenförmige gespritzte Kanäle als Hülsen mit dem erfindungsgemässen Verfahren repariert werden.The sleeve repair method according to the invention is of course also suitable for other sleeves which are fastened in a refractory vessel lining and are exposed to severe wear there, such as those in a tapping of a converter, an electric furnace, or in a tundish. Perforated stones, sleeve inserts, Free-wheeling nozzles or sleeve-shaped injected channels as sleeves can be repaired with the method according to the invention.

Das Verfahren eignet sich aber besonders vorteilhaft zum Reparieren der Innenhülsen von Giesspfannen, weil es die Möglichkeit bietet, die Innenhülse im Zuge der Automation des Giessbetriebs bei jedem Plattenwechsel schnell zu reparieren und damit den Bedarf an neuen Innenhülsen zu verringern. es entfällt die sonst beim Hülsenwechsel erforderliche Reinigung am Lochstein. Der Verschleiss des Lochsteins wird herabgesetzt und es entstehen keine störenden Versinterungen.However, the method is particularly advantageous for repairing the inner sleeves of pouring ladles, because it offers the possibility of quickly repairing the inner sleeve in the course of the automation of the casting operation with every plate change and thus reducing the need for new inner sleeves. There is no need to clean the perforated stone when changing the case. The wear and tear on the perforated brick is reduced and there is no disruptive sintering.

Die Erfindung ist mit den oben erläuterten Ausführungsbeispielen ausreichend dargetan. Sie könnte aber noch durch andere Varianten verdeutlicht sein. So könnte auch ein in der Mechanik eines Schiebeverschluss oder dergleichen befestigter feuerfester Wechselausguss mittels dem erfindungsgemässen Verfahren repariert werden.The invention has been sufficiently demonstrated with the exemplary embodiments explained above. However, it could also be clarified by other variants. A fireproof interchangeable spout fastened to the mechanism of a sliding lock or the like could thus also be repaired by means of the method according to the invention.

Anstelle von Lamellen könnten beim Rohrteil des Mörtelspenders auch andersförmige, die Freiräume begrenzende Mittel, zum Beispiel gewindeähnliche Erhebungen, vorgesehen sein.Instead of lamellas, other-shaped means delimiting the free spaces, for example thread-like elevations, could also be provided on the pipe part of the mortar dispenser.

Im Prinzip könnte dieses Befördern des Mörtels an die Innenwand einer Hülse auch durch ein nach aussen Drücken erfolgen, beispielsweise durch einen zylinderförmigen aufblasbaren ballonähnlichen Körper oder dergleichen.In principle, this conveying of the mortar to the inner wall of a sleeve could also take place by pushing it outwards, for example by means of a cylindrical inflatable balloon-like body or the like.

Claims (12)

  1. A method for repairing a refractory sleeve in a metallurgical vessel, which is fitted in the refractory lining (4) of the vessel (1) or in a mechanism, whereby the repair is carried out by applying mortar to the inner wall (6') of the sleeve (6) with a mortar dispenser (9) that can be inserted into the casting channel (7), characterised in that
    a pre-determined amount of mortar can be poured into spaces (13) of a section of pipe (10) of the mortar dispenser (9) lying on the outside distributed around its circumference, and the mortar by rotating the section of pipe (10) is centrifuged out of the spaces (13) and is conveyed to the outside into a formed cavity (14) between mortar dispenser (9) and the worn inner wall (6') of the sleeve (6), whereby the pre-determined amount of mortar corresponding approximately to the formed cavity (14) between the mortar dispenser (9) and the inner wall (6') of the sleeve (6).
  2. The method according to Claim 1, characterised in that when applying mortar to the inner wall (6') of the sleeve (6) the mortar dispenser (9) is rotated with a rotation speed such that the mortar mass is conveyed or sprayed by the centrifugal force that is generated onto the inner wall of the sleeve and this formed cavity (14).
  3. The method according to Claim 1, characterised in that in the condition inserted into the sleeve (6) the mortar dispenser (9) rotates coaxially in the casting channel for a certain time after spraying during the application of the mortar.
  4. The method according to Claim 3, characterised in that even after the start of the mortar curing process the mortar dispenser (9) is rotated in the sleeve for a specific amount of time dependent upon the composition of the mortar.
  5. The method according to any of the preceding Claims 1 to 4, characterised in that
    upon removing the rotating mortar dispenser (9) from the casting channel the mortar mass sprayed onto the channel wall is wiped away helically by the mortar dispenser (9).
  6. The method according to any of the preceding Claims 1 to 5, characterised in that
    the rotational speed of the mortar dispenser (9) is able to be set dependently upon the composition of the mortar and the structure and composition of the channel wall.
  7. The method according to any of the preceding Claims 1 to 6, characterised in that
    the mortar is applied to the sleeve (6) at a sleeve temperature of over 300°C.
  8. The method according to Claim 1, characterised in that in order to repair the inner sleeve (6) of a casting ladle (10) with a slide closure (20) adjoining the ladle spout, it is maintained automatically by a robot in a maintenance station of the casting facility, mortar is applied to the sleeve (6) during the maintenance of the slide closure (20) in the maintenance station, whereby the mortar dispenser (9) being automatically positioned and driven preferably by the robot for the manipulation of the slide closure (20).
  9. An apparatus for implementing the method according to any of the preceding Claims 1 to 8, characterised in that
    the mortar dispenser (9) is formed by a section of pipe (10) rotating about the longitudinal axis with spaces (13) lying on the outside distributed around its circumference, whereby these spaces (13) being dimensioned such that a pre-determined amount of mortar can be poured into them, which amount corresponds approximately to the cavity (14) formed between the mortar dispenser (9) and the inner wall (6') of the sleeve (6), whereby a drive shaft (19) is coupled to the mortar dispenser (9) for a rotary drive.
  10. The apparatus according to Claim 9, characterised in that the section of pipe (10) of the mortar dispenser (9) is formed with radially longitudinally directed blades (11), the length of which corresponds to the casting channel length of the sleeve to be repaired, whereas its outside diameter, defined by the blades, is equal to the target value of the casting channel diameter of the sleeve after the repair.
  11. The apparatus according to Claim 10, characterised in that the blades (11) are slightly convexly curved in the direction of rotation of the section of pipe.
  12. The apparatus according to either of Claims 10 or 11, characterised in that
    the spaces (13) between the blades (11) can be filled with mortar mass individually or together by a mortar feed device preferably disposed in the extension of the section of pipe (10).
EP15805170.6A 2015-02-20 2015-12-04 Method and device for repairing a refractory shell of a metallurgical vessel Active EP3259085B1 (en)

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CH00243/15A CH710773B1 (en) 2015-02-20 2015-02-20 Method and device for repairing a refractory sleeve of a metallurgical vessel.
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ES2878410T3 (en) 2021-11-18
TW201637752A (en) 2016-11-01
CA2973136C (en) 2023-03-07
AR103741A1 (en) 2017-05-31
TWI682819B (en) 2020-01-21
US10857593B2 (en) 2020-12-08
JP2018508362A (en) 2018-03-29
CN107206483B (en) 2021-09-07
RU2017129309A3 (en) 2019-06-20
CA2973136A1 (en) 2016-08-25
CH710773A2 (en) 2016-08-31
UA122141C2 (en) 2020-09-25
RU2707684C2 (en) 2019-11-28
RU2017129309A (en) 2019-03-20
EP3259085A1 (en) 2017-12-27
PL3259085T3 (en) 2021-11-15
CH710773B1 (en) 2019-04-30
BR112017015145A2 (en) 2018-01-23
WO2016131510A1 (en) 2016-08-25
KR20170119686A (en) 2017-10-27
MX2017010438A (en) 2017-11-13
BR112017015145B1 (en) 2021-09-28
CN107206483A (en) 2017-09-26
ZA201705337B (en) 2018-12-19
JP6849601B2 (en) 2021-03-24
KR102495554B1 (en) 2023-02-02
US20180029117A1 (en) 2018-02-01

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