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EP1181491B1 - Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve - Google Patents

Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve Download PDF

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Publication number
EP1181491B1
EP1181491B1 EP00925154A EP00925154A EP1181491B1 EP 1181491 B1 EP1181491 B1 EP 1181491B1 EP 00925154 A EP00925154 A EP 00925154A EP 00925154 A EP00925154 A EP 00925154A EP 1181491 B1 EP1181491 B1 EP 1181491B1
Authority
EP
European Patent Office
Prior art keywords
vessel
leg
discharge duct
molten metal
metallurgical vessel
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.)
Expired - Lifetime
Application number
EP00925154A
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German (de)
English (en)
Other versions
EP1181491A1 (fr
Inventor
Gerhard Fuchs
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.)
SIEMENS VAI METALS Technologies GmbH
Original Assignee
Arcmet Technologie GmbH
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
Priority claimed from DE19919378A external-priority patent/DE19919378A1/de
Application filed by Arcmet Technologie GmbH filed Critical Arcmet Technologie GmbH
Publication of EP1181491A1 publication Critical patent/EP1181491A1/fr
Application granted granted Critical
Publication of EP1181491B1 publication Critical patent/EP1181491B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
    • 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
    • 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
    • B22D11/113—Treating the molten metal by vacuum treating
    • 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
    • B22D41/14—Closures
    • 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
    • C21C5/46—Details or accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • 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
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0054—Means to move molten metal, e.g. electromagnetic pump
    • F27D2003/0056—Means to move molten metal, e.g. electromagnetic pump through a syphon in a vacuum chamber, e.g. involving aspiration or pressure on the bath
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein

Definitions

  • the invention relates to a metallurgical vessel with a tapping device for Controlled, slag-free removal of liquid metal according to the generic term of claim 1. Furthermore, it relates to a method using such a tapping device.
  • a device and a method for passing a predetermined amount of liquid metal from a metal bath containing a molten metal Receiving containers become known by means of a refractory-lined drainage pipe, where the principle of a liquid lifter is exploited.
  • the drainpipe is in Form an inverted U or V with two legs pointing down, of which the first an inlet opening and the second one by a closure device has gas-tight closable outlet opening for the liquid metal.
  • a vacuum device Fireproof lined pipe socket provided, which optionally via a first valve the vacuum device can be connected or via a second valve with the free atmosphere is connectable.
  • the vessel containing a molten metal bath in particular a melting furnace vessel
  • the second leg through the closure device sealed gas-tight, through a closable opening in the through water-cooled elements formed wall of the vessel top in the molten metal bath submerged, acting as a vent valve second valve closed and the first Open valve to connect the drain pipe with the vacuum device.
  • the Vacuum suction of the vacuum device the molten metal is pulled up in the first leg and runs over an overflow edge in the connecting region of the two legs in the second leg.
  • the closure device of the second Schenkels open, and the liquid metal on the principle of the liquid lifter in the Receptacle, preferably a pan, passed over.
  • the flow through the spillway can be interrupted so that a controlled, slag-free removal of the molten metal is possible.
  • the inlet opening before immersion in the molten metal bath by a sheet, which melts after immersion and releases the inlet opening.
  • the closure plate of the closure device is before the tapping off of the furnace vessel granular ff material filled in the second leg, the rest in the lower area has a narrowing.
  • DE-C 605 701 is a siphon for emptying thermal baths become known, in which in the surrounded by a heating jacket intake manifold an ejector nozzle is installed, which is heated together with the intake manifold. Through the ejector nozzle A negative pressure is generated, with which the process for controlled removal of Liquid is introduced from the vessel.
  • the object of the invention is, in a metallurgical vessel with a tapping according to the preamble of claim 1, regardless of the vessel size to allow a safe controlled slag-free removal of liquid metal.
  • a tapping There are various modifications of the tapping indicated be, in which an initiation of the tapping without negative pressure is possible, so that a vacuum device is unnecessary.
  • a procedure for the controlled slag-free stripping of liquid metal from a metallurgical Container can be specified using such a device.
  • the metallurgical vessel according to the invention with a tapping device is characterized by the Features of claim 1 characterized.
  • Advantageous embodiments of the tapping device can be found in claims 2 to 28.
  • the inventive method is characterized by the features of claim 29.
  • Advantageous embodiments This method can be found in the remaining claims.
  • the tapping can be dispensed with. This is done by a pressure compensation between the free atmosphere and the connecting region of the two legs, preferably via a vent valve or by the operation of the closure device allows a quick termination of tapping at any time, so that It can be ensured that with the removal of the liquid metal no slag is dragged out of the floating on the molten metal slag layer.
  • the furnace vessel 1 of an electric arc furnace shown in section.
  • the furnace vessel 1 consists of one, the brick oven hearth forming vessel lower part 2 for receiving the melt 3 and from a vessel upper part 4, which is formed of water-cooled elements.
  • the bottom of the Vessel lower part 2 falls to the tapping 5 out.
  • a Bodenabstich 9 of conventional design is then used when the furnace vessel, for example, before a furnace stoppage for repair or re-delivery should be completely emptied.
  • the furnace vessel can in a known manner in the direction the tapping 5 be designed tiltable.
  • the tapping device according to the However, invention does not require a tilting of the vessel, so that constructive Measures for tilting the furnace vessel and in the case of SchrottvormoreJraum to lift the shaft before tilting the furnace vessel unnecessary.
  • At a fixed stove can then equal to the water cooling elements on the tapping side long as the other water cooling elements are formed so that further savings on refractory material in the vessel wall are possible.
  • a refractory material surrounded drain channel 10 in the form of an inverted V with two down facing, upwardly connected legs 11 and 12 is formed.
  • the first leg 11 of the drainage channel penetrates the fireproof vessel wall 15 of the vessel base 2 seen from the oven interior obliquely increasing.
  • the second leg 12 is outside the furnace vessel 1 and has parallel to the vessel wall 15 vertically downwards. For manufacturing and maintenance reasons is the Outside of the refractory vessel wall 15 lying region of the tapping 5 by means a flange 16 with the refractory vessel wall penetrating portion of the Outflow channel 10 connected.
  • the first leg 11 of the discharge channel 10 has an inlet opening 17 with a Top edge 18, through which a height h0 is defined.
  • the second leg 12 of the discharge channel 10 has a through a closure device 19 closable outlet opening 20 for the liquid metal 3, which is lower than the Upper edge 18 of the inlet opening 17 of the discharge channel 10 on a designated hA Height is.
  • the closure device 19 is only schematically by a closure plate 21, which is repeated by means of a drive from one at the edge of the outlet opening 20 adjacent closed position in a release opening 20 releasing release position and is movable from the release position to the closed position. Will the Tapping over a second leg 12 from the previous tapping retained residue or a previously over the overflow edge 14 of the drainage channel inflowed overflow amount of the molten metal 3 is initiated, then in terms of Tightness of the closure by the closure device no special requirements to deliver.
  • the second leg 12 of the drainage channel 10 is extended below by a protective tube 22, that surrounds the metal beam when tapping the oven vessel 1 in a pan and him thus shields against the free atmosphere.
  • the flow area of the discharge channel is formed relatively large and just before the outlet opening 20, a flow-limiting section 23 with provided reduced flow area. Because this section due to the higher Flow rate is particularly stressed, he is as an independent, interchangeable Section formed (not shown). Apart from the section with reduced Flow area, which is used to form a jet with a circular Cross section preferably has a circular flow area, is in the Embodiment of the flow area of the discharge channel at least in the region of Inlet opening 17 of the first leg 11 rectangular or oval with a larger width than Height formed so that the remaining at tapping liquid sump Top edge 18 of the inlet opening 17 is located as far down. Dimensions of the clear cross section of the inlet opening with a width of about 30 cm and a height of about 20 cm have proven to be advantageous.
  • a Heating device In order with regard to an unhindered outflow of the melt during tapping a to hold in the drainage channel existing molten metal in the liquid state or a to liquefy frozen residual melt is the surrounding the spillway refractory material or a molten metal located in the drainage channel by means of a Heating device can be heated.
  • an inductive heating by means of a first, the first leg 11 of the discharge channel 10 surrounding induction coil 24 and a second, the second leg 12 of the discharge channel 10 surrounding induction coil 25 provided.
  • the induction coils can be acted upon separately with alternating current, so that as needed one in the first leg 11 or a second leg 12 located Molten metal can be heated.
  • insulating layers 26 are provided to the heat flow from the spillway to the cooled turns of the induction coils 24 and 25 to reduce.
  • the positively-cooled coils of the induction coils 24 and 25 can also be used to cool a retained metal melt in the drainage channel.
  • the insulating layers 26 are dispensed with.
  • the connecting portion 13 of the two legs 11 and 12 of the discharge channel 10 are at the embodiment in each case in alignment with the respective leg with ff material lined pipe socket 27 or 28 provided.
  • the with the first leg 11th aligned first pipe socket 27 is gas-tight manner by means of a flange 29 closed.
  • a second Flange 30 can be connected to at least one external device.
  • the second flange 30 is provided with a connecting pipe 31, to which via a first valve 32nd a vacuum device 39 shown symbolically in FIG. 2 can be connected.
  • a branch of the connecting pipe 31 is a second valve, which serves as a vent valve 33 is called, as when opening this valve, a connection to the free atmosphere can be produced.
  • a connection to the free atmosphere can be produced.
  • To reduce the free volume in the connection area 13 of the two legs 11 and 12 are on the inner sides of the flanges 29 and 30th refractory plugs 34 and 35 attached.
  • When removing the flanges 29 and 30 is the The interior of the legs 11 and 12, which are aligned with the respective pipe sockets, for inspection purposes. and maintenance purposes.
  • At least one of the pipe socket can also be used either instead of or in addition to the induction heating a burner as a heating device for the spillway or located in the spillway To connect molten metal.
  • FIG. 2 the part of the vessel containing the tapping in enlarged
  • some modifications and ancillary devices are shown which illustrate the Operation of the tapping device favor in some variants.
  • Solidification of the melt in this leg can be prevented by being in the vicinity the spillway inlet opening 17 a second, via a compressed gas line to a compressed gas source connectable, porous sink 37 are provided, which at the top the outflow channel opens, and with a circulation of the liquid metal in the first Leg 11 is achievable.
  • a porous sink in the bottom of the vessel base 2 for example, in a similar location as the Bodenabstich 9 in the vicinity of Provide spillway inlet opening 17 to by circulation in this area a Counteract cooling.
  • the reference numeral 40 designated device provided for detecting and controlling the height of the bath mirror h4 in connection region 13 of the two legs 11 and 12 of the drainage channel 10th
  • This device 40 includes a, the height of the bath level h4 detecting level sensor, whose output signal via a control loop z. B. the negative pressure of the vacuum device 39 regulates.
  • the acting in the connecting region 13 of the two legs 11 and 12 Underpressure may also be provided using a constant negative pressure Vacuum device 39 are regulated by the fact that supplied by the level sensor Control signals are supplied to a control valve 38 through which in the intake of the Vacuum device 39 controls false air to maintain the set point set level h4 is supplied.
  • the regulating device for maintaining a given height of the bath level h4 is unnecessary, if the length of the pipe socket 27th and 28 is sized so that the vulnerable elements always above the maximum Suction height of the molten metal lie.
  • the tapping 5 designed and operated so that at each tap the second leg is completely emptied, then preferably, as from the introductory WO 86/04980 known after tapping and re-closing the Outlet opening 20 of the discharge channel 10 by means of the closure plate 21 from above granular ff material filled in the second leg.
  • the connecting pipe 31 for the connection of a vacuum device and the possibility of connecting to the free atmosphere via the ventilation valve 33 can then be associated with the first flange 29, which is connected to the first Leg 11 of the drainage channel 10 is aligned.
  • the height h2 of the overflow edge 14 is located approximately at the same height as the maximum permissible bath level h3 of the molten metal 3. Since the slag layer 41 rests on the molten metal 3 in the vessel 1, the height h4 the bath level of the molten metal 3 in the spillway slightly larger than h3. This means, that shortly before reaching the maximum bath level h3 in the vessel 1 melt from the first leg 11 in the second leg 12 overflows and this leg of the drainage channel 10 fills. This state shortly before the tapping is shown in Fig. 1. The Free volume in the connection area 13 is due to a small difference kept small between heights h6 and h4.
  • the tapping must be terminated, when the bath level of the molten metal 3 has reached the height h7.
  • the termination of the Tapping process can either by closing the outlet opening 20 of the drain channel 10 done by means of a suitable closure device 19, by opening the vent valve 33, d. H. by false air supply in the connecting region 13 of the two Legs 11 and 12 or in a tiltable vessel by tilting back the vessel. in the the former case, the second leg 12 remains with a residual amount of molten metal at least partially filled. In the other cases, the second leg 12 emptied Completely.
  • the tapping device according to the invention only one tapping when reaching of the maximum bath level h3 is intended, then the tapping at the in Fig. 1 illustrated height ratios, as described, without the use of a vacuum device solely by the existing in the second leg 12 remaining amount or overflow amount be carried out on melt, this possibly by the heater 24, 25 in to give a liquid state.
  • the height h2 of the overflow edge 14 is lower than the height h3 of the maximum molten bath level arranged, then there is an overflow of the molten metal 3 in the second leg 12 guaranteed even if the bath level of the molten metal in the vessel 1 below the maximum height h3 is, namely, until the bath level of the molten metal has reached about the height h2.
  • this area is thus blessed embodiment of the Volume of the second leg always a reliable initiation of the tapping process ensured by tightening the melt from the first leg. Will the Overflow edge 14 set lower, it takes place during melting of the material in the vessel.
  • the overflow in the second leg 12 already some time before reaching the maximum bath level h3 the overflow in the second leg 12 and it must be here preferably by an inductive heating and / or Introducing a gas over the sink 37 and 36 a cooling and solidifying the Melt counteracted.
  • the height h2 of the overflow edge 14 the height h0 of the upper edge 18 of the spillway inlet opening 17 is considered.
  • the height h7 is not fallen below, d. H. it should apply: h2 ⁇ h7.
  • this height information refers to the tilted Status.
  • a vacuum device is required for the initiation of the tapping process, in the example shown to the connection channel 31 via the valve 32nd is connectable.
  • the vacuum device is dependent on the liquid metal column to be lifted sized. Lower suction pressures could also be achieved by ejector nozzles according to the principle realize the aforementioned DE-C 605 701. A slight lifting of the Badapt in the first leg can also be by introducing gas through the porous Sink 36 and 37 achieve due to the drag effect.
  • the outlet opening 20 of the discharge channel 10 is closed and filled into the lower portion of the second leg 12 granular ff material.
  • the furnace 1 has been charged with feed and it will be the next batch melted down.
  • the level of the bath rises in the melting vessel 1 and simultaneously in the first leg 11 of the drainage channel.
  • the induction coil 24 is energized and / or gas introduced through the sink 37 and 36, respectively.
  • melt flows out of the first leg 11 over the overflow edge 14 in the second leg 12 and fills it, and here too by energizing the induction coil 25, d.
  • an inductive heating the melt a cooling is prevented. This is during the melting process Venting valve 33 is opened to a pressure build-up in the connecting region 13 of the two Prevent legs 11 and 12.
  • vent valve 33 Before tapping the vent valve 33 is closed again and by opening the Closing device initiated the tapping. With the outflowing overflow amount in the second leg 12 is melt from the first leg 11 and the furnace vessel tightened until the height h7 is reached. By opening the vent valve 33 the removal process is interrupted by the supply of false air to a retraction of To prevent slag. An amount of liquid metal corresponding to the level of the bath remains as a swamp in the vessel. After again closing the closure device 19 and Fill in of free-flowing ff material is repeated the process described.
  • the beam by means of the closure device 19 are interrupted, so that in the second leg 12 a residual amount retained liquid metal.
  • One in the first leg 11 of the drainage channel below the level of the overflow edge 14 dropped bathroom mirror h4 can be used to initiate a new Abstichvorganges by means of the vacuum device, optionally including the bath level control by means of the level sensor of the device 40 and / or by Injecting gas through the porous sink 36 via the overflow edge 14 lift.
  • the refractory vessel wall 115 of Vessel lower parts 102 penetrating first leg 111 of the discharge channel 110 has a horizontal first portion 111a and a vertical second portion 111b, which connected via an enlarged connection portion 113 with the second leg 112 is.
  • the overflow edge 114 of the drainage channel 110 is set lower and instead a gas-tight seal above the enlarged connection area 113 is a Cover 143 provided with a cover penetrating the burner 144, with the enlarged connection area or an existing in this molten metal is heatable.
  • the closure of the connection area caused by the cover 143 113 may be gas-tight. However, this is not a necessary condition since by the deep replacement of the overflow edge 114 a slag-free tap even then can be initiated and performed when the connection area 113 through the Cover 143 is not sealed airtight.
  • the horizontal formation of the first portion 111 a of the first leg 111 subsequent to the bottom contour 108 of the lower vessel 102 and an embodiment of the Flow cross-section of the discharge channel 110 at least in the region of the inlet opening 117 of the first leg 111 in rectangular or oval shape with greater width than Height can be on the one hand through the section 123 with a reduced flow area limited flow velocity of the metal at the spillway inlet 117 hold low and on the other hand, the upper edge 118 of the spillway inlet opening 117 further than in a circular cross-section of the spillway inlet opening 117th shift down.
  • the ratio between the cross section of the spillway inlet opening 117 and the cross section of the flow restricting portion 123 is located at about 4: 1.
  • the metallurgical vessel shown in FIGS. 3 to 5 is designed to be tiltable.
  • Fig. 3 shows the zero or working position of the vessel and Fig. 5, the tilted position. Of the Tilt angle is approximately between three and five degrees.
  • the maximum tilted condition is decisive, that is, in the tilted state shown in Fig. 5 may be to ensure a slag-free tapping the height h2 of the overflow edge 114 is not below the height h7 lie, by the inlet vortex a retraction of the molten metal 103 floating slag 141 in the spillway 110 via the top edge 118 of the Outflow channel inlet 117 takes place.
  • the slag-free tapping can be up to the height h7 one in the vessel 101st perform remaining molten metal 103 without any of a suction effect as a result a tight seal above the connection area 113 made use of must become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (35)

  1. Cuve (1, 101) métallurgique, comprenant un dispositif (5, 105) de coulée destiné à retirer de manière commandée et sans scories du métal (3, 103) liquide d'un bain (3, 103) de métal fondu se trouvant dans la partie (2, 102) inférieure de la cuve, le dispositif (5, 105) de coulée comportant un canal (10, 110) d'évacuation entouré de matériau réfractaire et ayant deux branches (11, 12, 111, 112) dirigées vers le bas et communiquant vers le haut, dont la première (11, 111) traverse la cuve en une ouverture (17, 117) d'entrée ayant un bord (18) supérieur et la seconde (12, 112) a une ouverture (20, 120) de sortie du métal (3, 103) liquide plus basse et munie d'un dispositif (19, 119) d'obturation tandis que plus loin à l'intérieur du canal d'évacuation, dans la partie (13, 113) de liaison des deux branches (11, 12, 111, 112) est défini un bord (14, 114) de débordement du métal liquide à un niveau (h2) supérieur au niveau (h0) du bord supérieur de l'ouverture d'entrée du canal d'évacuation,
       caractérisée    en ce que la première branche (11, 111) du canal (10, 110) d'évacuation traverse la maçonnerie réfractaire de la paroi (15, 115) de la partie inférieure (2) de la cuve et y est intégrée,
       en ce que dans la position de travail de la cuve, le bord (14, 114) de débordement est plus bas que le bord supérieur de la maçonnerie réfractaire de la paroi (15, 115) du récipient, mais est au maximum à un niveau (h3), qui est défini par le niveau (h3) maximum admissible pour le bain du métal (3) fondu, et
       en ce qu'au moins une partie du matériau réfractaire entourant le canal (10) d'évacuation ou du métal (3) fondu se trouvant dans le canal d'évacuation peut être chauffée au moyen d'un dispositif (24, 25, 144) de chauffage.
  2. Cuve métallurgique suivant la revendication 1,
       caractérisée en ce que dans la partie (13) de liaison des deux branches (11, 12) du canal (10) d'évacuation il est monté au moins une tubulure qui est revêtue de matériau ff, qui peut être obturée d'une manière étanche aux gaz au moyen d'une bride (29, 30) et/ou qui peut être raccordée à au moins un dispositif extérieur.
  3. Cuve métallurgique suivant la revendication 2,
       caractérisée en ce qu'au moins l'une des deux branches (11, 12) du canal (10) d'évacuation a une tubulure (29, 30) dans l'alignement de la branche concernée.
  4. Cuve métallurgique suivant la revendication 2 ou 3,
       caractérisée en ce que la bride (30) est munie d'un tuyau (31) de raccordement auquel se raccorde par une première vanne (32) un dispositif (39) de mise sous vide en tant que dispositif extérieur.
  5. Cuve métallurgique suivant l'une des revendications 2 à 4,
       caractérisée en ce que la bride (30) est munie d'un tuyau (31) de raccordement qui peut communiquer avec l'atmosphère extérieure par une deuxième vanne (31) de mise à l'atmosphère.
  6. Cuve métallurgique suivant l'une des revendications 1 à 5,
       caractérisée en ce qu'il est prévu un dispositif (40) de détection et, le cas échéant, de commande du niveau du bain (h4) dans la partie (13) de liaison des deux branches (11, 12) du canal (10) d'évacuation.
  7. Cuve métallurgique suivant la revendication 6,
       caractérisée en ce qu'en liaison avec un dispositif (39) de mise sous vide pouvant être réglée à une pression constante il est prévu une sonde de niveau détectant le niveau du bain (h4) dans la partie (13) de liaison des deux branches (11, 12) du canal (10) d'évacuation, sonde qui envoie des signaux de commande à une vanne (38) de régulation qui est prévue dans un conduit pour du gaz mettant la partie (13) de liaison en communication avec l'atmosphère extérieure.
  8. Cuve métallurgique suivant l'une des revendications 1 à 7,
       caractérisée en ce qu'à proximité de l'ouverture (17) d'entrée du canal d'évacuation débouche au moins un bloc (36, 37) poreux pouvant être raccordé à une source de gaz comprimé par un conduit pour du gaz comprimé et destiné à introduire un gaz à l'intérieur de la cuve (1) ou du tuyau (10) d'évacuation.
  9. Cuve métallurgique suivant la revendication 8,
       caractérisée en ce que le bloc (36, 37) débouche du côté inférieur et/ou du côté supérieur de la première branche (11) dans le passage du canal (10) d'évacuation.
  10. Cuve métallurgique suivant l'une des revendications 2 à 9,
       caractérisée en ce qu'à la position de travail de la cuve le flanc (29, 30) de la tubulure est à un niveau plus haut que la hauteur (h3) définie par le niveau maximum admissible du bain de métal fondu.
  11. Cuve métallurgique suivant l'une des revendications 1 à 10,
       caractérisée en ce qu'en la position de travail de la cuve (1), le bord (14) de débordement est à un niveau plus haut que le niveau (h7) du bain de métal fondu pour lequel il s'effectue une entrée, due à un tourbillonnement d'entrée au-dessus du bord (18) supérieur de l'ouverture (17) d'entrée du canal d'évacuation, de scories provenant de la couche (41) de scories flottant sur le métal (3) fondu.
  12. Cuve métallurgique suivant l'une des revendications 1 à 13,
       caractérisée en ce qu'en la position de travail de la cuve (1) le bord (14) de débordement est à un niveau plus bas que le niveau (h5) du fond (42) d'une ouverture (7) pour l'évacuation de scories prévue dans la paroi (15) de la cuve.
  13. Cuve métallurgique suivant la revendication 12 ,
       caractérisée en ce qu'en la position de travail de la cuve (1) le bord (14) de débordement est à peu près à un niveau (h3) qui est défini par le niveau maximum admissible du métal (3) fondu.
  14. Cuve métallurgique suivant l'une des revendications 1 à 13,
       caractérisée en ce que la première branche (11) du canal (10) d'évacuation passe à travers la paroi (15) réfractaire de la cuve en montant de manière inclinée à partir de l'intérieur du four.
  15. Cuve métallurgique suivant l'une des revendications 1 à 13,
       caractérisée en ce que la première branche (111) du canal (110) d'évacuation comporte une première partie (111a) horizontale et une deuxième partie (111b) verticale qui communique avec la deuxième branche (112) par la partie (113) de liaison.
  16. Cuve métallurgique suivant l'une des revendications 1 à 15,
       caractérisée en ce que la deuxième branche (12) du canal (10) d'évacuation est disposée à l'intérieur d'une saillie en encorbellement de la cuve (1) de four.
  17. Cuve métallurgique suivant l'une des revendications 1 à 16,
       caractérisée en ce qu'il est prévu dans la deuxième branche (12) du canal (10) d'évacuation un tronçon (23) limitant le débit en ayant une section transversale de passage diminuée.
  18. Cuve métallurgique suivant la revendication 17,
       caractérisée en ce que le tronçon (23) de section transversale de passage diminuée est placé un peu en amont de l'ouverture (20) de sortie du canal (10) d'évacuation.
  19. Cuve métallurgique suivant la revendication 17 ou 18,
       caractérisée en ce que le tronçon (23) de section de passage diminuée est monté de manière à pouvoir être remplacé.
  20. Cuve métallurgique suivant l'une des revendications 1 à 19,
       caractérisée en ce que la section transversale de passage du canal (10) d'évacuation est constituée au moins dans la partie de l'ouverture (17) d'entrée de la première branche (11) en étant rectangulaire ou ovale en ayant une largeur plus grande que la hauteur.
  21. Cuve métallurgique suivant l'une des revendications 1 à 20,
       caractérisée en ce que le rapport entre la section transversale de l'ouverture (17, 117) d'entrée du canal d'évacuation et la section transversale du tronçon (23, 123) limitant le débit est d'environ 4:1.
  22. Cuve métallurgique suivant l'une des revendications 2 à 21,
       caractérisée en ce que le dispositif de chauffage peut être raccordé à la tubulure (27).
  23. Cuve métallurgique suivant l'une des revendications 2 à 22,
       caractérisée en ce qu'il peut être raccordé à une tubulure (28) alignée avec la deuxième branche (12) du canal (10) d'évacuation par l'intermédiaire d'un dispositif d'addition dosée un réservoir ayant du matériau ff en grains.
  24. Cuve métallurgique suivant l'une des revendications 1 à 23,
       caractérisée en ce que le dispositif de chauffage comporte au moins une bobine (24, 25) d'induction entourant la première et/ou la deuxième branche du canal (10) d'évacuation.
  25. Cuve métallurgique suivant l'une des revendications 1 à 24,
       caractérisée en ce que le dispositif (19) d'obturation de l'ouverture (20) de sortie du canal (10) d'évacuation comporte une plaque (21) d'obturation qui, au moyen d'un entraínement, peut être déplacée de manière répétée d'une position d'obturation se trouvant au bord de l'ouverture (20) de sortie à une position où elle dégage l'ouverture (20) de sortie et de la position de dégagement à la position d'obturation.
  26. Cuve métallurgique suivant l'une des revendications 1 à 25,
       caractérisée en ce que l'ouverture (17, 117) d'entrée du tuyau d'évacuation est disposée au voisinage du fond (8) de la cuve.
  27. Cuve métallurgique suivant l'une des revendications 1 à 26,
       caractérisée en ce que la cuve (101) est montée basculante en direction du dispositif (110) de coulée.
  28. Cuve métallurgique suivant l'une des revendications 1 à 27,
       caractérisée en ce que le niveau (h2) du bord (14, 114) de débordement est plus haut, de préférence seulement un peu plus haut, que le niveau (h7) de bain d'un métal (303) fondu présent dans la cuve (1), dans lequel il s'effectue par un tourbillon d'entrée une entrée de scories (41, 141) flottant sur le métal (3, 103) fondu dans le canal (10, 110) d'évacuation par le bord (18, 118) supérieur de l'ouverture (17, 117) d'entrée du canal d'évacuation.
  29. Procédé pour retirer de manière commandée et sans scories du métal liquide d'un bain de métal fondu se trouvant dans une cuve suivant le principe d'un élévateur de liquide au moyen d'un dispositif suivant l'une des revendications 1 à 28,
       dans lequel, après une opération de coulée, on obture l'ouverture de sortie du canal d'évacuation, on élève le cas échéant le niveau du bain fondu dans la cuve, notamment en y introduisant du métal fondu, jusqu'à un niveau de coulée et on fait commencer l'opération de coulée après avoir fermé une vanne de mise à l'atmosphère présente dans une dérivation de la partie de liaison des deux branches en ouvrant le dispositif d'obturation de la deuxième branche et en dérivant une quantité restante retenue dans la deuxième branche par l'opération de coulée précédente et/ou une quantité de débordement du métal fondu qui est entrée dans les deux branches par le bord de débordement de la partie de liaison, grâce à quoi du métal fondu supplémentaire présent dans la première branche et dans la cuve est retiré.
  30. Procédé suivant la revendication 29,
       caractérisé en ce que, pour faire commencer l'opération de coulée, après l'obturation de la vanne de mise à l'atmosphère et avant l'ouverture du dispositif d'obturation, on aspire par raccordement d'un dispositif de mise sous vide à la partie de liaison des deux branche du canal d'évacuation du métal fondu de la première branche communiquant avec l'intérieur de la cuve et on le transporte au-dessus du bord de débordement dans la deuxième branche.
  31. Procédé suivant la revendication 29 ou 30,
       caractérisé en ce que pour faire commencer l'opération de coulée, après l'obturation de la vanne de mise à l'atmosphère et avant l'ouverture du dispositif d'obturation, on aspire en faisant basculer une cuve qui peut basculer en direction du canal d'évacuation du métal fondu de la première branche communiquant avec l'intérieur de la cuve et on le transporte dans la deuxième branche en passant au-dessus du bord de débordement.
  32. Procédé suivant l'une des revendications 29 à 31,
       caractérisé en ce qu'avant de faire commencer l'opération de coulée on chauffe l'intérieur d'au moins l'une des deux branches du canal d'évacuation ou un métal fondu présent dans la branche concernée.
  33. Procédé suivant l'une des revendications 29 à 32,
       caractérisé en ce que pour mettre fin à l'opération de coulée on ouvre la vanne de mise à l'atmosphère.
  34. Procédé suivant l'une des revendications 29 à 33,
       caractérisé en ce que pour une cuve de four qui peut basculer on met fin à l'opération de coulée en faisant basculer la cuve dans un sens opposé au canal d'évacuation.
  35. Procédé suivant l'une des revendications 29 à 34,
       caractérisé en ce qu'après que l'opération de coulée est achevée et que le dispositif d'obturation de la deuxième branche du canal d'évacuation est obturée, on charge de la matière ff en grains dans le tronçon inférieur de cette branche.
EP00925154A 1999-04-01 2000-03-31 Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve Expired - Lifetime EP1181491B1 (fr)

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DE19914982 1999-04-01
DE19914982 1999-04-01
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DE19919378A DE19919378A1 (de) 1999-04-01 1999-04-28 Metallurgisches Gefäß mit einer Abstichvorrichtung und Verfahren zum kontrollierten, schlackenfreien Abziehen von flüssigem Metall aus diesem Gefäß
PCT/EP2000/002903 WO2000060297A1 (fr) 1999-04-01 2000-03-31 Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve

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DE102008008033A1 (de) 2007-08-04 2009-02-05 Sms Demag Ag Einrichtung zum schlackenfreien Abstich oder zur Überführung einer Schmelze
CN102735066A (zh) * 2012-06-14 2012-10-17 芜湖楚江合金铜材有限公司 潜流式通道机构及使用所述机构进行溶液流通控制的方法
WO2015043910A1 (fr) 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Partie inférieure de récipient, récipient métallurgique configuré avec une telle partie inférieure ainsi que four à arc électrique et procédé pour le faire fonctionner
WO2015043900A1 (fr) * 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Partie inférieure de récipient, récipient métallurgique configuré avec une telle partie inférieure ainsi que four à arc électrique et procédé pour le faire fonctionner
EP4311994A1 (fr) 2022-07-26 2024-01-31 Primetals Technologies Austria GmbH Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide

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Publication number Priority date Publication date Assignee Title
DE102008008033A1 (de) 2007-08-04 2009-02-05 Sms Demag Ag Einrichtung zum schlackenfreien Abstich oder zur Überführung einer Schmelze
CN102735066A (zh) * 2012-06-14 2012-10-17 芜湖楚江合金铜材有限公司 潜流式通道机构及使用所述机构进行溶液流通控制的方法
CN102735066B (zh) * 2012-06-14 2013-12-18 芜湖楚江合金铜材有限公司 潜流式通道机构及使用所述机构进行溶液流通控制的方法
WO2015043910A1 (fr) 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Partie inférieure de récipient, récipient métallurgique configuré avec une telle partie inférieure ainsi que four à arc électrique et procédé pour le faire fonctionner
DE102013219682A1 (de) 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Gefäßunterteil, ein damit ausgebildetes metallurgisches Gefäß sowie Elektrolichtbogenofen und Verfahren zu dessen Betrieb
WO2015043900A1 (fr) * 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Partie inférieure de récipient, récipient métallurgique configuré avec une telle partie inférieure ainsi que four à arc électrique et procédé pour le faire fonctionner
DE102013219686A1 (de) 2013-09-30 2015-04-02 Siemens Vai Metals Technologies Gmbh Gefäßunterteil, ein damit ausgebildetes metallurgisches Gefäß sowie Elektrolichtbogenofen und Verfahren zu dessen Betrieb
EP4311994A1 (fr) 2022-07-26 2024-01-31 Primetals Technologies Austria GmbH Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide
WO2024023095A1 (fr) 2022-07-26 2024-02-01 Primetals Technologies Austria GmbH Récipient métallurgique avec un dispositif de coulée pour la coulée contrôlée de métal liquide

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WO2000060297A1 (fr) 2000-10-12
JP2002541422A (ja) 2002-12-03
CA2367997A1 (fr) 2000-10-12
EP1181491A1 (fr) 2002-02-27
CZ20013496A3 (cs) 2002-10-16
PL193887B1 (pl) 2007-03-30
EA003075B1 (ru) 2002-12-26
TR200102772T2 (tr) 2002-04-22
CN1187566C (zh) 2005-02-02
ATE246791T1 (de) 2003-08-15
AU763426B2 (en) 2003-07-24
AU4397300A (en) 2000-10-23
CZ297606B6 (cs) 2007-02-07
BR0009479A (pt) 2002-02-19
CA2367997C (fr) 2007-01-09
CN1345409A (zh) 2002-04-17
ES2204571T3 (es) 2004-05-01
PL350411A1 (en) 2002-12-02
EA200101018A1 (ru) 2002-04-25
MXPA01009780A (es) 2002-05-14
US6596221B1 (en) 2003-07-22

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