EP2191918A1 - Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss - Google Patents

Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss Download PDF

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Publication number
EP2191918A1
EP2191918A1 EP08169513A EP08169513A EP2191918A1 EP 2191918 A1 EP2191918 A1 EP 2191918A1 EP 08169513 A EP08169513 A EP 08169513A EP 08169513 A EP08169513 A EP 08169513A EP 2191918 A1 EP2191918 A1 EP 2191918A1
Authority
EP
European Patent Office
Prior art keywords
tube
cleaning
channel
unit
pocket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08169513A
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English (en)
French (fr)
Inventor
Vincent Boisdequin
Damien Delsine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vesuvius Group SA
Original Assignee
Vesuvius Group SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vesuvius Group SA filed Critical Vesuvius Group SA
Priority to EP08169513A priority Critical patent/EP2191918A1/de
Publication of EP2191918A1 publication Critical patent/EP2191918A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to the casting of liquid metal, in particular a device for cleaning a pocket tube intended to be introduced into a casting installation.
  • a pocket tube is a tube comprising a channel extending substantially along an axis, this channel allowing the passage of liquid metal.
  • Such a tube is in particular introduced into the casting installation so that the axis of the channel is vertical, the channel for conveying the liquid metal between a pocket filled with liquid metal and a distributor distributing the liquid metal in different molds. casting.
  • Such a tube is generally used in several installations. Indeed, during casting, when a bag is empty, the pocket tube is detached from the bag, the tube is removed from the installation and the bag is moved away from the distributor. Another pocket, full, takes the place of the empty pocket above the tundish and the pocket tube is secured to this new pocket. He then ensures the passage of the liquid metal from this new pocket to the distributor.
  • a device for cleaning an oxygen pocket tube comprising a lance placed in the channel of the pocket tube when it has just been extracted from the casting installation and is still at high temperature. Oxygen is then injected into the tube using the lance. At this temperature, oxygen oxidizes the deposited metal in the tube.
  • the metal oxide for example iron oxide in the case of steel casting, dissociates from the walls of the channel, which allows the elimination of metal deposits in the tube.
  • the lance is held by an operator and the pocket tube is held in a manipulator arm, controlled by another operator.
  • the device of the state of the art is not safe because the lance and the tube are subjected to significant pressure due to the injection of oxygen and unwanted movements of operators can occur.
  • flames escape from it during the cleaning operation, at the opposite end of that into which the lance was introduced.
  • Such movements of the operators are therefore likely to lead to material and human damage in the vicinity of the installation, due to an involuntary exposure of certain material elements or operators to the flames.
  • the invention overcomes the aforementioned drawbacks by providing a device cleaning method improving the safety of the installation, without increasing the complexity of the method of cleaning the pocket tube.
  • the tube is isolated from the operators and the casting installation and is put in place in this device so that the flames escaping from the tube during the cleaning operation are confined. During the cleaning operation, the flames are therefore not likely to damage an element of the installation or to burn an operator standing outside the device.
  • the cleaning device makes it possible to put the tube in a reproducible and determined cleaning position relative to the oxygen injection orifice.
  • the lance and the tube are manipulated by operators and the lance has many degrees of freedom relative to the tube. It can for example be pressed at different depths in the tube and take different orientations relative to the inner wall thereof.
  • the solid metal deposits may not all be eliminated, depending on how the operator positions the lance in the tube.
  • the cleaning position can be chosen so that the elimination of the metal is entirely ensured at each passage of the tube in the device.
  • the invention also relates to a pocket tube for a liquid metal casting installation adapted to cooperate with a cleaning device according to the invention, comprising a channel extending substantially along an axis, and a corresponding inlet end. at one end of the channel along its axis, the tube comprising securing means, in particular at least two notches, preferably three notches, in the vicinity of the inlet end, adapted to cooperate with the support means, in particular the pieces complementary, arranged on the cleaning device, the securing means being in particular provided on the casing of the tube.
  • the tube also comprises a rim near its inlet end, this rim being oriented downwardly when the tube is in a position of use in the casting installation.
  • the invention also relates to an assembly of a cleaning device according to the invention and a pocket tube, in particular a pocket tube according to the invention.
  • the invention also relates to a part for a device for cleaning a pocket tube, made of a refractory material, the part having an orifice for injecting oxygen and a sharp edge, preferably forming a tip.
  • This piece constitutes the cleaning part of the cleaning device according to the invention.
  • a surface of the tube is in friction against the sharp edge of the cleaning part.
  • the tube can be pushed against the cleaning part of the device during the displacement and injection steps.
  • a cleaning device 10 according to a particular embodiment of the invention.
  • This device 10 comprises a frame 12 comprising four feet 14 attached to a screw casting platform.
  • the feet 14 comprise for this purpose each four fixing holes 16 at their lower end.
  • the feet are for example made of a metallic material.
  • the device 10 also includes a clearance 17 for accommodating a pocket tube.
  • the device 10 also comprises, at its upper end, a frame 18 in which is placed a cleaning part 20, forming an injection element and having an orifice 22 for the injection of oxygen.
  • This piece is made of a refractory material because it must withstand heat from the pocket tube, such a tube being still very hot when it is introduced into the cleaning device and the flames and heat generated during the oxygen cleaning operation.
  • the cleaning part 20, shown more particularly schematically in the figure 6 also comprises, on its surface facing the clearance 17, visible in this figure, a sharp edge 21 projecting from this surface.
  • This edge is shaped tip, that is to say it is constituted by two wings 21a, 21b rectilinear forming an angle between them. The piece is oriented in the device so that the tip is directed towards the outside of the device.
  • the part 20 also comprises, formed on its surface turned towards the clearance, a circular groove 23a surrounding the injection orifice 22.
  • This groove 23a is connected to a channel 23b of cross section identical to the section of the circular groove 23a, this channel connecting the circular groove 23b to one end of the cleaning part 20.
  • Fluid injection means (not shown in the figures), in particular argon, are connected to the channel 23b and allow injection of the argon in the circular groove 23a, when the tube is put into place in the device as shown in FIG. figure 4 .
  • Guide rails 24 are fixed under the frame 18. Support means 26 of the tube are engaged in these rails 24.
  • the support means 26 are displaceable by sliding in the guide rails 24 by means of displacement 28, constituted by rollers cooperating in rotation with each rail 24, a groove 25, visible on the figure 4 , being provided for this purpose in each rail.
  • the support means 26 of the tube are in particular constituted by an H-shaped piece, comprising two lateral branches 26a, 26b and a central branch 27.
  • the two lateral branches 26a, 26b are intended to engage in the rails 24.
  • the piece thus exhibits a spacing according to the spacing of the rails 24.
  • the piece also has, on each of its branches, on a surface thereof facing the other branch, a pin 30.
  • Each of the two pins 30 is intended to cooperate with a notch 32 of a tube 31, which will be described below.
  • the tube 31 is able to be inserted between the two lateral branches of the H.
  • the support means are intended to hold the tube in suspension in the device 10, so that the tube takes in the device a position identical to its position of use in a casting installation, the axis of a channel 33 of the tube being vertical and its upper end corresponding to its inlet end.
  • the device 10 also comprises activation means of the support means, comprising two jacks 34 connected to the central branch 27 of the H 26 piece, to move it in the rails 24. These jacks can be controlled electronically and at distance by an operator.
  • the device 10 also comprises, under each rail 24 pushing means for pushing the tube upwards. These means cooperate with a flange 36 of the tube, which will be described below.
  • the thrust means comprise a traction-compression element 38 comprising three horizontal springs 40. These springs 40 are each able to exert pressure on a rocker 42, connected to the frame 12 by an off-center pivot connection 44, the axis of the pivot connection being the same as the axis of the guide rail 24. Each piece The flip-flop 42 also includes a horizontal upper surface 46 at its end facing the clearance.
  • the device 10 further comprises an oxygen distributor 48, this part taking place in the injection port 22. It is connected to an oxygen dispensing device and its outlet surface is pierced with a multitude of orifices. distributed on it and shaped to distribute the oxygen throughout the tube.
  • the pocket tube 31 for use in a liquid metal casting plant, including liquid steel.
  • the tube 31 comprises a channel 33 for the passage of the metal, extending essentially along an axis, the axis being vertical when the tube is in the position of use.
  • the figure shows an upper end of the tube when it is in its position of use, this end being able to be in contact with the cleaning part 20 of the device 10.
  • the tube comprises a tube body 50 made of refractory material and, at its end, a head 52 of square cross section of shape distinct from a cross section of the body of the tube 50, which has a circular section.
  • the cross section is defined as being normal to the axis of the channel 33.
  • the square section of the head 52 is larger than the circular cross-section of the tube body 50 and, therefore, between the head 52 and the tube body 50, the tube 31 comprises a substantially horizontal flange 36 and turned towards the lower end of the tube when the tube is in its position of use, a position corresponding to its position in the cleaning device.
  • the head 52 of the tube ends in a flat inlet surface 54.
  • This surface 54 is in particular able to come into contact with the lower surface of the cleaning part 20.
  • a casing 56 made in one piece is arranged around an end portion of the tube body 50.
  • This casing 56 is made of a metallic material and in particular steel and covers the entire head 52 and an upper part of the tubular part of the tube 50.
  • the envelope 56 comprises an annular portion forming a belt 58 of greater thickness than the rest of the envelope.
  • the thickness of the belt 58 is greater than 10 millimeters, preferably 14 millimeters, while the rest of the envelope is of thickness between 2 and 7 millimeters, preferably between 4 and 6 millimeters.
  • the belt 58 of the metal casing is formed in the portion in which this casing covers the head 52.
  • the envelope 56 comprises four notches 32, formed in the belt 58 of the envelope, in particular in the lower part of this belt.
  • the four notches are identical. They form means for securing the tube to the support means 26 of the cleaning device.
  • Each notch 32 is located on a separate side of the head 52, in the middle of this side.
  • the notches 32 are delimited by abutment surfaces capable of cooperating with abutment surfaces complementary to the pins 30 of the support means 26.
  • two notches 32 situated on opposite sides of the head 52 cooperate with two pins 30 of the support.
  • the tube comprises four notches, one can confer thereon several angular orientations along the axis of the channel relative to the casting installation and the cleaning device. Indeed, the notches 32 being identical and uniformly distributed over the head, the tube can be put in place in the installation or the cleaning device according to four distinct orientations.
  • the metal casing 56 further comprises, in the portion covering the tubular portion of the tube, four identical fins 62 extending substantially along the axis of the channel and triangular cross section. Each fin 62 is located under one of the notches 32 and are therefore spaced 90 °. The fins 62 make it possible to position the tube in a desired orientation in a handling device that moves the tube 31 to the cleaning device.
  • the fins 62 are in particular intended to cooperate with notches of complementary shape of the handling device and form guide means of the tube.
  • the tube comprises four fins 62, it can be placed in the handling device in several orientations along the axis of the channel relative to this device, so as to set up the tube in different orientations in the installation or the device of cleaning.
  • the tube 31 is extracted from a casting installation in which it is placed between a pocket and a distributor. This extraction is performed using a handling device (not shown) comprising a support head adapted to grip the tube cooperating with the fins 62 thereof.
  • the handling device then places the tube in the cleaning device 10.
  • the cleaning device 10 comprises its support means 26 in the loading position, as shown in FIG. figure 2 the pins 30 then protruding from the frame 18, which makes them easily accessible.
  • the handling device places the tube 31 in the support means so that the notches 32 of the tube cooperate with the pins of the cleaning device 10. More particularly, the handling device places the tube between the two branches. 26 and 26b of the H-shaped part so that the notches 32 are located above the pins 30 and then the notches 32 are placed on the pins 30.
  • the handling device can bring the tube 31 in several directions in the cleaning device 10, according to the number of uses of the tube already made. Indeed, as the tube 31 comprises four notches 32, all the notches can be placed on a given pin, it can be placed in several ways in the device. If the handling device brings the tube into the cleaning device 10 with a certain orientation and resumes it with another orientation, this makes it possible to change the orientation tube in the casting installation and to extend the service life of the tube.
  • the method comprises a step of moving the support means in the guide rails 24, this displacement being effected by means of the rollers 28 and being activated by the remote control cylinders 34.
  • the support means and the tube are moved to a cleaning position of the tube, shown in FIG. figure 3 and at the figure 4 , in which the channel 33 of the tube 31 faces the injection orifice 22 of the device.
  • the inlet surface 54 of the tube 31 is in friction against the edge 21 of the cleaning part 20, the tip of this edge being formed in the opposite direction of the direction of movement of the means of support from the loading position to the cleaning position.
  • This edge makes it possible to scrape the surface 54 and to remove the solidified metal that could have been deposited thereon.
  • the tip shape of the edge is used to guide the scraped material by the friction of the edge and the surface to the side of the tube and out of the device 10.
  • the thrust means push the tube upwards.
  • the springs 40 exert a pressure on the rocking piece 42 which tends to rotate so that the surface 46 thereof, in contact with the rim 36 of the tube, is driven upwards, driving with it the tube.
  • the pushing means are also controlled remotely.
  • the inlet surface 54 of the tube 31 is then pressed against the lower surface of the cleaning plate 20.
  • the circular groove 23a of argon is filled via the channel 23b and fluid injection means, which allows the device to be sealed, the argon preventing the oxygen from damaging the surface of the device. entry 54.
  • Oxygen is then injected into the tube through the injection port 22 and the oxygen distributor 48, which allows the oxygen to be well distributed over the entire inner wall of the tube.
  • the support means are moved from the cleaning position to the loading position and the handling device returns to the tube 31 by grasping the latter with its fins and the return to another casting installation.
  • the loading position is not the position described. It could for example be a position below the cleaning position.
  • the tube can be placed horizontally in a device according to the invention.
  • the thrust means, the scraping means of the surface and the argon insulation means are optional or may be constituted by elements other than those described.
  • the edge may be linear or curved or the thrust means may be constituted by vertical springs.
  • the support means may not take the form described. They may be constituted by a displaceable frame on which is placed the lower end of the tube, the frame being movable in translation or in rotation, a rotation of this frame may allow to change the orientation of the tube relative to the installation casting.
  • the support means may also comprise three pins instead of two, the third pin being located on the central branch of the H-piece, to completely immobilize the tube during the displacement of the support means.
  • the tube may also not include fins and may be grasped differently by the handling device.
  • the tube may comprise only two notches 32 to cooperate with the pins 30 or no notch.
  • the tube and the device may be made of other materials than those described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP08169513A 2008-11-20 2008-11-20 Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss Withdrawn EP2191918A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08169513A EP2191918A1 (de) 2008-11-20 2008-11-20 Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08169513A EP2191918A1 (de) 2008-11-20 2008-11-20 Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss

Publications (1)

Publication Number Publication Date
EP2191918A1 true EP2191918A1 (de) 2010-06-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08169513A Withdrawn EP2191918A1 (de) 2008-11-20 2008-11-20 Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss

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EP (1) EP2191918A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110280751A (zh) * 2019-07-31 2019-09-27 广东韶钢松山股份有限公司 一种长水口碗部清理装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57115968A (en) * 1981-01-08 1982-07-19 Nisshin Steel Co Ltd Method and means for cleaning of teeming nozzle hole with oxygen
EP0528724A1 (de) * 1991-08-09 1993-02-24 Sollac Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen
JPH07232266A (ja) * 1994-02-24 1995-09-05 Nippon Supingu Kk ロングノズル孔自動洗浄方法とその装置及び洗浄装置用シールドリング
JPH0825006A (ja) 1994-07-08 1996-01-30 Nkk Corp 連続鋳造機のロングノズル自動清掃装置
EP0858851A1 (de) * 1997-01-17 1998-08-19 Sumitomo Heavy Industries, Ltd. Brammen-Stranggiessmaschine mit Vorrichtung zum Auswechseln eines Tauchgiessrohres und Verfahren zum Auswechseln eines Tauchgiessrohres
KR20040021971A (ko) * 2002-09-06 2004-03-11 주식회사 포스코 쉬라우드 노즐과 콜렉타 노즐의 자동 연결장치

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57115968A (en) * 1981-01-08 1982-07-19 Nisshin Steel Co Ltd Method and means for cleaning of teeming nozzle hole with oxygen
EP0528724A1 (de) * 1991-08-09 1993-02-24 Sollac Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen
JPH07232266A (ja) * 1994-02-24 1995-09-05 Nippon Supingu Kk ロングノズル孔自動洗浄方法とその装置及び洗浄装置用シールドリング
JPH0825006A (ja) 1994-07-08 1996-01-30 Nkk Corp 連続鋳造機のロングノズル自動清掃装置
EP0858851A1 (de) * 1997-01-17 1998-08-19 Sumitomo Heavy Industries, Ltd. Brammen-Stranggiessmaschine mit Vorrichtung zum Auswechseln eines Tauchgiessrohres und Verfahren zum Auswechseln eines Tauchgiessrohres
KR20040021971A (ko) * 2002-09-06 2004-03-11 주식회사 포스코 쉬라우드 노즐과 콜렉타 노즐의 자동 연결장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110280751A (zh) * 2019-07-31 2019-09-27 广东韶钢松山股份有限公司 一种长水口碗部清理装置
CN110280751B (zh) * 2019-07-31 2021-06-15 广东韶钢松山股份有限公司 一种长水口碗部清理装置

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