EP3613518A1 - Dispositif de retrait sans scorie de l'acier liquide du distributeur ou de la cuve à l'aide du système deflux - Google Patents

Dispositif de retrait sans scorie de l'acier liquide du distributeur ou de la cuve à l'aide du système deflux Download PDF

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Publication number
EP3613518A1
EP3613518A1 EP19187052.6A EP19187052A EP3613518A1 EP 3613518 A1 EP3613518 A1 EP 3613518A1 EP 19187052 A EP19187052 A EP 19187052A EP 3613518 A1 EP3613518 A1 EP 3613518A1
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EP
European Patent Office
Prior art keywords
plate
plates
floor
floor outlet
edge
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.)
Granted
Application number
EP19187052.6A
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German (de)
English (en)
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EP3613518B1 (fr
Inventor
Veronica Stilkerieg
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Individual
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Individual
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Publication of EP3613518A1 publication Critical patent/EP3613518A1/fr
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/116—Refining the metal
    • B22D11/118—Refining the metal by circulating the metal under, over or around weirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • 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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • 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
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag

Definitions

  • the invention relates to a device for low-slag removal of the liquid steel from a distributor or a pan when opening the floor outlet, consisting of the floor outlet assigned plate-shaped fittings made of refractory material which influence the vortex, which have a vertical brake part or a plate and one with the floor to be connected stand, the braking part has a sharp edge facing the floor outlet, maintaining a predetermined distance, facing the floor outlet and is arranged at a predetermined angle to the plug or a starter tube.
  • the EP 1 866 111 B1 describes for the first time a plate-shaped built-in part made of refractory material, which is designed and arranged in such a way that it divides the resulting strudel in the area of the floor outlet at an early stage.
  • the edge of this plate facing the floor outlet is sharpened in order to "push" into the vortex better.
  • This part of the plate ie the vertically upright part, has a shark fin shape.
  • the angle of attack it is only mentioned that an additional refractive effect should occur due to the angle for plugging.
  • the invention is therefore based on the object to further minimize the discharge of slag, to optimally adapt the shape of the plate to the particular circumstances of the pan or distributor and to enable the use of the whirl-breaking plates even with starter tubes.
  • the object of the invention is advantageously achieved in that the plate-shaped internals have a shape in which the edge opposite the sharp edge has a design which ensures the stability of the foot region of the plate and is equipped with a rectangular base which is provided with the associated recess in Floor is designed accordingly.
  • a flow leading to the bottom outlet and a flow leading away from it can be generated with the aid of the plate.
  • the aid of such a plate or a vortex crusher it is first of all ensured that the plate remains stable until the end of the removal of the liquid phase through the bottom outlet so that the desired vortex prevention is ensured.
  • the flow of the liquid steel that acts on the plate is directed past the plate in such a way that the desired vortex interruption occurs, but at the same time the plate itself is only removed to a limited extent.
  • the base has a notch on the top receiving the plate.
  • the plate is then inserted or inserted into this notch, whereby it is adequately fixed by the notch, additional gluing or other fixing being readily possible.
  • the base has a bevel pointing towards the plate in the region of the notch. The flow is therefore only influenced by the plate itself.
  • a secure fit or hold of the plate in the bottom of the pan or the distributor is ensured by the fact that the base has a free height of 50 to 80 mm, which is chosen according to the depth of the recess in the bottom.
  • the plate can thus neither be twisted nor pulled out of the ground if the liquid steel flows against the plate and acts on the attempted vortex formation.
  • the brake part designed as a plate has a bevel connecting the upper edge and the opposite edge.
  • This design also has the advantage that the plate as such only has the required weight, because the cutting of the vertebra is done with the front part, i.e. causes the part having the sharp edge, while the opposite edge mainly serves to guide the current.
  • a design of the plate which is particularly advantageous for guiding the liquid steel provides that the bevel starts at 40-60% of the length of the upper edge and is perpendicular to the lower edge up to 1 ⁇ 2 to 2/3 of the total height of the plate and then in a slight curve opposite edge is formed leading, the description already shows that the foot area of the plate is preserved in its stability.
  • the plate-shaped brake part has a straight and a side flank that runs obliquely to the longitudinal axis of the plate, the straight side flank being pulled through to the tip of the sharp edge, while the oblique and the
  • the plate with the flanking side flank ends at a distance of 5.5 - 2.5 cm in front of the tip and is then designed to lead obliquely to the tip.
  • the steel is then guided along the plate in a targeted manner.
  • the prior art only speaks of an angle at which the plate is to be arranged. This is an imprecise specification for the person skilled in the art, so that it is to be regarded as advantageous that the plate according to the invention should have an angle of attack of 10-30 degrees to the floor outlet. This slope guarantees the targeted intervention in the resulting vortex, so that there is almost no vortex formation or only lateral side currents that are completely harmless and cannot adversely affect the leakage of the molten steel through the bottom outlet. If the plate is placed almost straight to the floor outlet, large additional vortices are created so that the desired effect cannot be achieved. The above So angle is very important.
  • the plate is given a particularly favorable position if it is arranged connected to the floor in front of the floor outlet in the opposite direction to the vortex direction of the floor outlet. This means that it is positioned at the intended angle of attack of 10 to 30 degrees and then at the same time not “leaning" against the center of the floor outlet but rather at the outer edge, so that the flowing liquid steel can be targeted prevent an adverse vortex from being generated. It is important that the plate is arranged against the direction of the vortex, with its sharp edge.
  • starter tubes or starter kits are fire-resistant pipes made of light material that are placed on the spout / floor outlet to prevent contaminants from getting into the first steel. These components usually have a diameter of 10 cm and are approximately 20 cm high. After reaching the steel bath height of approx. 20 cm, the starter tubes dissolve, so that it would still be necessary to prevent the vortex over the plates, but is just not accessible with a plate. The steel bath height is reduced to 7 or less centimeters, i.e. Liquid steel will continue to be drawn off, even if the starter tubes are no longer available. These starter tubes are thick-walled so that the plates cannot be pushed close enough to the floor outlet.
  • the vortex formation can also be reliably prevented if, preferably when using a starter tube, two plates, forming a funnel for the flowing steel, are arranged at an angle of inclination of 20-45 degrees to the longitudinal axis of the pan with the tip pointing towards the bottom outlet.
  • This arrangement of the two plates ensures that the outflowing steel is led to the floor outlet, whereby at most swirls can occur in the corner areas of the pan or the distributor, which, however, are harmless for guiding the liquid steel.
  • both plates are arranged with the sharp edge or the tip facing the floor outlet with the same angle of attack. They should also be fixed at the same distance from the floor outlet so that a very uniform funnel is created, which can safely guide the molten steel towards the floor outlet without any whirling. It should be mentioned once again that the small swirls that arise in the corners cannot influence the leakage of the molten steel.
  • a fine adjustment is achieved when both plates are arranged with the tip pointing obliquely to the floor outlet, the tip being directed towards the outer edge of the starter tubes.
  • the liquid steel is fed through the hopper to the floor outlet and, of course, a flow around the plates around the floor outlet, which leads to the floor outlet, so that the steel can flow evenly through the floor outlet.
  • the funnel formed by the plates is formed in the longitudinal axis of the pan or of the distributor with the funnel end pointing towards the bottom outlet.
  • the two plates are aligned accordingly and generate a flow in which liquid steel is fed into the floor outlet without the formation of a vortex.
  • the arrangement of the two plates can be changed in accordance with the changed influences if the flow velocity of the flowing liquid steel, the inside diameter of the floor outlet, or the geometry of the floor changes significantly.
  • Such changes in the arrangement of the two plates are possible, for example, in that the recess in the floor, which is composed of individual stones, is designed to give a different angle of attack. It is therefore only necessary to replace one or two stones in the floor in order to generate the changed inflow angle.
  • Another possibility is to change the shape of the two plates in order to influence the flow of the molten steel differently.
  • the influencing of the flow of the liquid steel is additionally possible according to the invention in that the inner flank of the plates forming the funnel is of concave curvature.
  • the liquid steel is gently brought in one direction to the floor outlet, without supporting the tendency to whirl.
  • the invention is characterized in particular by the fact that suitable plates for the use with stoppers and also with starter tubes are created which positively influence the flow within the pan or the distributor. They have a shape that specifically prevents the formation of whirlpools and enables the liquid steel to be guided, which enables the liquid steel to be drawn off from the pan or from the distributor up to approximately the ash layer lying thereon. The bear remaining in the pan or the distributor thus reaches the smallest possible size.
  • this form of the plate gives the possibility of reliably preventing the formation of disadvantageous eddies even when starter tubes and starter kits are used, whereby two identical plates are expediently used, which are set up at a certain angle and thus form a kind of funnel that specifically targets the liquid steel Leads to the floor outlet without giving it the opportunity to create adverse eddies.
  • FIG. 1 shows an arrangement with a ladle 1, in which liquid steel 5 is held. From this ladle 1, the liquid steel is fed into the distributor 2 in order to be supplied to the further processing points in a targeted manner.
  • This distributor 2 or a pan 43 shown further behind has a plurality of floor outlets 3 which are initially closed by a stopper 14. When the liquid steel 5 is called up, this stopper becomes 14 pulled up so that the molten steel can flow over the floor outlet 3 in the direction of the casting mold 7 and roller rolls 8. After the plug 14 has been pulled up, a vortex 4 is formed above the bottom 9, which draws the liquid ash 55 with the liquid steel through the bottom outlet 3.
  • This is disadvantageous and should be prevented by arranging 3 plate-shaped internals 6 in the area of the floor outlet.
  • These plate-shaped internals 6 have the shape of a plate 20 and consist of a braking part 10 and a base 11. The front edge is designed as a sharp edge 12.
  • FIG. 2 shows a pan 43, in which liquid steel 5, which is also supplied via the shadow pipe 13, is held in order to then be supplied for further use via the floor outlets 3, 3 '.
  • Such pans 43 may be designed to be easily tiltable in order to achieve a further discharge of liquid steel 5 when the liquid steel 5 is approximately discharged.
  • a plate-shaped installation 6 is in Figure 3 shown.
  • Such a plate 20 has a sharp edge 12, as was mentioned earlier.
  • the plate 20 shown has only a slight bevel 25, in order to reduce the weight of the plate 20 on the one hand, but on the other hand to guide the liquid steel 5 along the plate 20 in a targeted manner without the formation of whirlpools.
  • the plate 20 has a base 11 which is rectangular or even square, has a notch 24 into which the plate 20 can be inserted or inserted.
  • This stand 11 is inserted into a recess 19 in the bottom 9 of the distributor 2 or the pan 43 and is fixed in such a way that neither the plate 20 nor the stand 11 can twist.
  • the stand 11 has a sufficient free height 26, which corresponds to the depth of the recess 19.
  • the plate 20 shown has a shape in the foot region 18 which contributes to the stabilization of the region so as to ensure the safe positioning of the plate 20.
  • This version for stabilization 16 can have different shapes. It is important that the foot area 18 is still sufficiently strong, even after the plate 20 has been used for a long time, in order to ensure the position of the plate 20.
  • the edge opposite the sharp edge 12 is designated by 17. As already mentioned, it is somewhat shortened, as is the upper edge 28 of the braking part 10 or the plate 20. This results in an aerodynamic shape of the plate 20, the base 11 in the region of its upper side 23 also being so beveled that a flow of the molten steel is not to be feared.
  • a shape of the plate 20 which is particularly well suited to the intended use provides that, while maintaining the stable foot region 18, a part of the braking part 10 which is not absolutely necessary for guiding the liquid steel 5 is dispensed with.
  • the upper edge 28 has broken off and in part 29 initially leads straight towards the base 11, in order to then lead to the opposite edge 17 in a slope 29 or in a slight curve 31.
  • the lower edge 30 remains straight and changes to accommodate the base 11.
  • the sharp edge 12 parallel to the opposite edge 17 is particularly "sharp" because here not two slopes but only a correspondingly steeper and longer slope 36 is used.
  • Figure 5 shows a top view or bottom view of a plate 20, wherein it can be seen that in addition to the tips 35, which are designed to be quite stable, the opposite edge 17 has a slimming which enables the liquid steel 5 to be guided more favorably. This is achieved in that the side flank 32 runs straight and parallel to the longitudinal axis 33 of the plate, while the other side flank 34 runs obliquely, namely from the tip 35 in the direction of the opposite edge 17.
  • Figure 6 shows a front-head view of a plate, the base 11 being recognizable at the bottom, while 46 denotes the inner flank, which here has a concave design (27). This ensures quiet but targeted guidance of the flow of the liquid steel 5.
  • a pan 43 shows from above Figur7 , It is indicated that a floor outlet 3 at the end of the pan 43, as from Figure 2 can be seen, is arranged so that the centrally filled liquid steel 5 must flow in the direction of the bottom outlet 3.
  • the plate 20 arranged in the vicinity of the bottom outlet 3 results in the liquid steel 5 being guided in such a way that an inflowing steel stream 47 and a away-flowing steel stream 48 result, the majority of course through the bottom outlet 3 to the distributor 2 or to Mold 7 flows.
  • the plate 20 with its tip 35 is arranged with a certain inflow angle, which is defined in the claim, so that the aforementioned steel flows 47, 48 result.
  • In the corners 51 of the pan 43 there are small eddies which are completely harmless and are designated 49. Overall, there is a calm flow, so that harmful eddies cannot arise.
  • FIG 9 illustrates more clearly how it is expedient with starter tubes 15 to guide the liquid steel 5.
  • Two plates 20, 41, 42 are used in such a way that they form a funnel 40 which feeds the flowing liquid steel 5 precisely to the bottom outlet 3.
  • the edges 12 having the tip 35 are arranged such that they extend beyond the center 22 and lead at a close distance to the outer edge 38 of the starter tube 15.
  • the angle of attack 37 for both plates 41, 42 is defined as described in the claims and ensures that there is a funnel end 45 which ensures optimal entry of the liquid steel 5 into the floor outlet 3.
  • the described angle of attack 37 relates to the longitudinal axis 44 of the pan 43.
  • FIG. 10 shows once again a top view of a pan 43, in which, similar to that in FIG Figure 9 the position of the two plates 41, 42 is shown. It can be seen that the entire stream 50 is moving towards the floor outlet 3 and is thereby directed by the two plates 41, 42 in such a way that the funnel 40 with the hopper end 45 is formed and a diversion of the stream 50 to the floor outlet in the corner regions 3 to. The small eddies created in the corners 51 are harmless.
  • two plates 41, 42 are provided in order to be able to feed the liquid steel 5 selectively and in a calm flow onto the bottom outlet 3.
  • the bottom outlet 3 is secured during operation almost all of the time via a so-called starter tube 15 in such a way that the steel is at least initially led downwards through the bottom outlet 3 over the upper edge of the starter tube. All of this is done in a targeted and calm manner, so that harmful vertebrae cannot even arise. It is essential in this entire embodiment that the shape of the plates 20, 41, 42 ensure smooth guidance of the liquid steel 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP19187052.6A 2018-08-21 2019-07-18 Dispositif de retrait sans scorie de l'acier liquide du distributeur ou de la cuve à l'aide du système deflux Active EP3613518B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018120300.4A DE102018120300A1 (de) 2018-08-21 2018-08-21 Vorrichtung zum schlackearmen Entnehmen des flüssigen Stahls aus Verteiler oder Pfanne mit dem Deflux-System

Publications (2)

Publication Number Publication Date
EP3613518A1 true EP3613518A1 (fr) 2020-02-26
EP3613518B1 EP3613518B1 (fr) 2022-11-23

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EP19187052.6A Active EP3613518B1 (fr) 2018-08-21 2019-07-18 Dispositif de retrait sans scorie de l'acier liquide du distributeur ou de la cuve à l'aide du système deflux

Country Status (4)

Country Link
EP (1) EP3613518B1 (fr)
DE (1) DE102018120300A1 (fr)
EA (1) EA038806B1 (fr)
UA (1) UA124895C2 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1313736A (en) 1969-09-09 1973-04-18 Kloeckner Werke Ag Process for the continuous casting of aluminium-killed steels
GB1391845A (en) 1971-04-22 1975-04-23 Kloeckner Werke Ag Process and apparatus for continuous casting
DE3444228A1 (de) 1984-11-30 1986-06-12 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zur erzeugung einer gerichteten stroemung
US5196051A (en) 1991-07-19 1993-03-23 Premier Refractories And Chemicals Inc. Ladle and method for draining liquid metal with improved yield
USRE35597E (en) 1992-05-12 1997-08-26 Usx Corporation Refractory article for preventing vortexing in a metallurgical vessel
EP1172447A1 (fr) 2000-06-28 2002-01-16 SMS Demag AG Procédé et dispositif pour éviter l'entraínement de laitier pendant l'écoulement d'un métal -, notamment de l'acier, - d'un recipient métallurgique en position verticale
DE202005005229U1 (de) * 2005-03-31 2005-08-04 Bktec Gmbh Vorrichtung zum schlackearmen Entnehmen des Flüssigstahls aus dem Verteiler bei der Stahlerzeugung
EP1866111A2 (fr) * 2005-03-31 2007-12-19 BKTEC Duroplastiche werkstoffe Gmbh Procede de prelevement avec peu de laitier d'acier liquide du distributeur ou de la poche de coulee lors de la production d'acier et brise-tourbillon correspondant
DE102008016621A1 (de) * 2008-04-01 2009-10-08 Stilkerieg, Berthold, Dipl.-Ing. Vorrichtung zum schlackenfreien Abstechen einer Stahlschmelze
DE102009009740A1 (de) * 2009-02-19 2010-08-26 Stilkerieg, Berthold, Dipl.-Ing. Vorrichtung zur Strudelvermeidung in metallurgischen Gefäßen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005025317A1 (de) * 2005-03-31 2006-10-05 Bktec Duroplastische Werkstoffe Gmbh Verfahren zum schlackearmen Entnehmen des Flüssigkstahls aus Verteiler oder Pfanne bei der Stahlerzeugung

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1313736A (en) 1969-09-09 1973-04-18 Kloeckner Werke Ag Process for the continuous casting of aluminium-killed steels
GB1391845A (en) 1971-04-22 1975-04-23 Kloeckner Werke Ag Process and apparatus for continuous casting
DE3444228A1 (de) 1984-11-30 1986-06-12 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zur erzeugung einer gerichteten stroemung
US5196051A (en) 1991-07-19 1993-03-23 Premier Refractories And Chemicals Inc. Ladle and method for draining liquid metal with improved yield
USRE35597E (en) 1992-05-12 1997-08-26 Usx Corporation Refractory article for preventing vortexing in a metallurgical vessel
EP1172447A1 (fr) 2000-06-28 2002-01-16 SMS Demag AG Procédé et dispositif pour éviter l'entraínement de laitier pendant l'écoulement d'un métal -, notamment de l'acier, - d'un recipient métallurgique en position verticale
DE202005005229U1 (de) * 2005-03-31 2005-08-04 Bktec Gmbh Vorrichtung zum schlackearmen Entnehmen des Flüssigstahls aus dem Verteiler bei der Stahlerzeugung
EP1866111A2 (fr) * 2005-03-31 2007-12-19 BKTEC Duroplastiche werkstoffe Gmbh Procede de prelevement avec peu de laitier d'acier liquide du distributeur ou de la poche de coulee lors de la production d'acier et brise-tourbillon correspondant
EP1866111B1 (fr) 2005-03-31 2009-08-12 BKTEC Duroplastiche werkstoffe Gmbh Procede de prelevement avec peu de laitier d'acier liquide du distributeur ou de la poche de coulee lors de la production d'acier et brise-tourbillon correspondant
DE102008016621A1 (de) * 2008-04-01 2009-10-08 Stilkerieg, Berthold, Dipl.-Ing. Vorrichtung zum schlackenfreien Abstechen einer Stahlschmelze
DE102009009740A1 (de) * 2009-02-19 2010-08-26 Stilkerieg, Berthold, Dipl.-Ing. Vorrichtung zur Strudelvermeidung in metallurgischen Gefäßen

Also Published As

Publication number Publication date
UA124895C2 (uk) 2021-12-08
EA201991743A1 (ru) 2020-03-31
EP3613518B1 (fr) 2022-11-23
EA038806B1 (ru) 2021-10-22
DE102018120300A1 (de) 2020-03-26

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