EP4311994A1 - Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide - Google Patents

Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide Download PDF

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Publication number
EP4311994A1
EP4311994A1 EP22186913.4A EP22186913A EP4311994A1 EP 4311994 A1 EP4311994 A1 EP 4311994A1 EP 22186913 A EP22186913 A EP 22186913A EP 4311994 A1 EP4311994 A1 EP 4311994A1
Authority
EP
European Patent Office
Prior art keywords
tapping
vessel
channel
vessel wall
liquid metal
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.)
Pending
Application number
EP22186913.4A
Other languages
German (de)
English (en)
Inventor
Alexander Mueller-Mathis
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria 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
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP22186913.4A priority Critical patent/EP4311994A1/fr
Priority to PCT/EP2023/070592 priority patent/WO2024023095A1/fr
Publication of EP4311994A1 publication Critical patent/EP4311994A1/fr
Pending legal-status Critical Current

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Classifications

    • 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; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • 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; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/20—Arrangements of heating devices
    • F27B3/205—Burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1518—Tapholes
    • 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 is in the field of metallurgical plants, specifically in the field of metallurgical vessels of metals.
  • the metallurgical vessel has a tapping device for the controlled tapping of liquid metal, which is located in a lower part of the vessel.
  • the lower part of the vessel consists of a fireproof lining with a vessel base and a closed vessel wall.
  • a portion of the vessel wall, from an inside of the vessel wall to an outside of the vessel wall, has a drainage channel.
  • the tapping device is designed in such a way that the outflow channel on the outside of the vessel wall opens into a tapping channel of the tapping device.
  • the tapping channel initially extends upwards - at an absolute angle of 0° to 20° to the force of gravity, preferably at an absolute angle of 0° to 5° to the force of gravity, opposite to the direction of the force of gravity - to an overflow channel - which extends essentially at an angle of 90 ° to the force of gravity - and the overflow channel opens into a tap hole channel which - essentially in the direction of the force of gravity - at an absolute angle of 0 ° to 20 ° to the force of gravity, preferably at an absolute angle from 0° to 5° to the earth's gravity - runs downwards to a tap opening.
  • a tapping device disclosed in this document shows a tendency for the melt to solidify in the channel of the tapping device in phases of processes in which standstills occur between the melts.
  • the channel begins at the same level as the bottom of the vessel, which means that the channel is always flooded with liquid steel. It can therefore happen that the liquid metal solidifies during breaks in the process. This solidified metal must then be melted again with liquid metal, which is created when a new process phase starts.
  • the object of the present invention is to provide a simple design of the tapping device in which the solidification of liquid metal in the tapping channel is prevented.
  • a lower edge of the drainage channel is located on the vessel wall, measured on an inside of the vessel wall from a cutting edge of the vessel wall and the vessel bottom, at a height of 50-300mm, with the drainage channel being at least in a partial area of the vessel wall extends through the vessel wall essentially at a 90° angle to the vessel wall.
  • the height of the step depends, on the one hand, on the size of the vessel and, on the other hand, on the respective process operation of the metallurgical furnace.
  • This stage allows liquid metal to enter the drain channel with a time delay, even in the melting phase, and thus there is a longer phase in which the drain channel is heated, and thus solidification in the drain channel is avoided due to insufficient temperature of the brick lining in the drain channel .
  • the outflow channel should be at a 90° angle to the vessel wall at least in a partial area of the vessel wall, preferably over the entire width of the vessel wall, since such a step can be produced particularly easily and inexpensively.
  • the height of the stage is preferably set so that a defined sump of liquid metal is either below or above the stage.
  • the focus can be either to delay the inflow of the liquid metal sump into the drainage channel or to completely prevent the slag from flowing in by completely covering the drainage channel with liquid metal.
  • the height of the lower edge is determined depending on the percentage of a sump of liquid metal - which remains in the metallurgical melting vessel after tapping - of a tapping weight of the metallurgical vessel, which can be in the range of 15%-70%.
  • the height of the lower edge can be chosen so that in the critical process phases, such as process breaks, the liquid metal remaining in the furnace remains completely in the melting vessel and the drainage channel can run completely empty.
  • the drain channel In addition to a rectangular cross-section, it can also have a vaulted cross-section or a round cross-section. If the lower edge is not a straight line, then the height is always understood to be that which is the shortest distance from the cutting edge of the vessel wall and the vessel bottom.
  • the lower edge and/or an upper edge has a chamfer.
  • the chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm.
  • the bevel or radius allows for better flow into the drainage channel.
  • a flow number increases due to the principle of the rounded or chamfered lower edge and/or upper edge and thus increases a flow rate.
  • At least one side edge of the drainage channel has a chamfer or a radius.
  • the chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm.
  • the bevel allows for better flow into the drainage channel. Because the liquid metal flows in more evenly from all sides, the inlet speed of the liquid metal is harmonized across a cross section of the outflow channel. The one-sided wear on the top edge is reduced and the abrasion is distributed more evenly across all side parts. This extends the service life of the drain channel.
  • the tapping opening is located above a lower edge on an outer surface of the vessel bottom. Due to the fact that the lower edge of the drainage channel is above the bottom of the vessel, a lower edge of the vessel bottom can be moved upwards in the area of the drainage channel in order to achieve the same thickness of the refractory lining. This allows the tap opening to be moved upwards in order to obtain a shorter length of the tap hole channel to the tap opening. The shorter length reduces the risk of the canal becoming blocked.
  • a burner is placed in the middle of the tapping channel, the burner having an output of at least 0.2 MW and a maximum of 1 MW.
  • the central arrangement of the burner reduces wear on the refractory lining in the overflow channel and tapping channel.
  • An advantageous embodiment provides that a ratio of the hydraulic diameter of the drainage channel to a diameter of the tap opening is at least greater than 0.9.
  • Figs 1 - 4 shows a schematic representation of a metallurgical vessel with a tapping device.
  • FIG. 1 A metallurgical vessel 1 is shown, the lower part of the vessel having a refractory lining with a vessel bottom 2 and a closed vessel wall 3. There is a bottom tap 9 in the vessel bottom 2. There is a drain channel 4 in the vessel wall 3. A lower edge 5 of the drain channel 4 is at a height H, measured from the intersection of the vessel wall 3 and the vessel bottom 2. The bottom edge 5 extends from the bottom edge 5 Outflow channel essentially at an angle of 90 ° through the vessel wall 3.
  • a tapping device 10 is designed such that the outflow channel 4 opens into a tapping channel 11 of the tapping device 1 and the tapping channel 11, when the metallurgical vessel 1 is in a melting position, is initially extends upward - against the direction of gravity Fg - to an overflow channel 12 and then extends downward into a tap hole channel 13 - in the direction of gravity Fg - to a branch opening 14.
  • a metallurgical vessel 1 is also shown with an inside 3a and an outside 3b of the vessel wall 3.
  • the lower edge has a chamfer 5a and an upper edge 5d has a chamfer with the dimension a.
  • a side wall 5b of the drainage channel 5 also has a chamfer 5c.
  • the bevels are each attached at the transition from the inner surface 3a of the vessel wall to the drainage channel 4.
  • This design ensures that the liquid metal flows in particularly well from all sides.
  • the one-sided wear of the upper edge is reduced.
  • the abrasion is distributed more evenly on all four sides of the drain channel 5. This extends the service life of the drain channel.
  • Fig. 3 is in contrast to Fig. 1 the lower edge of the tap opening 13 above a lower edge of the vessel bottom 2b, the lower edge 2b being located on an outer surface 2a of the vessel base 2.
  • the lower edge 2b is the deepest point of the vessel bottom on its outer surface 2a. This design shortens the length of the tapping channel 11 from the overflow channel 12 to the tapping opening 14.
  • the tapping device 10 In addition to the refractory lining 10a, the tapping device 10 also consists of a steel structure 10b.
  • the vessel wall 3 which also consists of a refractory lining 3c and a steel structure 3d, is shown with the inside 3a and the outside 3b and the drainage channel 4, which extends from the inside 3a to the outside 3b and opens into the tapping channel 11.
  • the tap channel 11 then extends upwards to an overflow channel 12, which then opens into the tap hole channel 13, with a diameter d.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP22186913.4A 2022-07-26 2022-07-26 Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide Pending EP4311994A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22186913.4A EP4311994A1 (fr) 2022-07-26 2022-07-26 Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide
PCT/EP2023/070592 WO2024023095A1 (fr) 2022-07-26 2023-07-25 Récipient métallurgique avec un dispositif de coulée pour la coulée contrôlée de métal liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22186913.4A EP4311994A1 (fr) 2022-07-26 2022-07-26 Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide

Publications (1)

Publication Number Publication Date
EP4311994A1 true EP4311994A1 (fr) 2024-01-31

Family

ID=82742932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22186913.4A Pending EP4311994A1 (fr) 2022-07-26 2022-07-26 Récipient métallurgique doté d'un dispositif de coulee permettant de coulee de manière controlee du métal liquide

Country Status (2)

Country Link
EP (1) EP4311994A1 (fr)
WO (1) WO2024023095A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665976A5 (en) * 1984-05-18 1988-06-30 Marti Technologie Collection vessel fitted to tapping hole of furnace - to enable slag-free melt tapping
US6596221B1 (en) * 1999-04-01 2003-07-22 Arcmet Technologie Gmbh Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel
KR20050010620A (ko) * 2003-07-22 2005-01-28 주식회사 포스코 샌드 고착방지 및 자동파쇄가 가능한 전기로 출강보 개공장치의 오프너
DE102004050701B3 (de) * 2004-10-18 2006-04-06 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr für ein metallurgisches Schmelzgefäß
CN107062900A (zh) * 2017-06-20 2017-08-18 许玉蕊 一种交流电弧熔炼炉

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665976A5 (en) * 1984-05-18 1988-06-30 Marti Technologie Collection vessel fitted to tapping hole of furnace - to enable slag-free melt tapping
US6596221B1 (en) * 1999-04-01 2003-07-22 Arcmet Technologie Gmbh Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel
EP1181491B1 (fr) 1999-04-01 2003-08-06 Arcmet Technologie Gmbh Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve
KR20050010620A (ko) * 2003-07-22 2005-01-28 주식회사 포스코 샌드 고착방지 및 자동파쇄가 가능한 전기로 출강보 개공장치의 오프너
DE102004050701B3 (de) * 2004-10-18 2006-04-06 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr für ein metallurgisches Schmelzgefäß
CN107062900A (zh) * 2017-06-20 2017-08-18 许玉蕊 一种交流电弧熔炼炉

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Publication number Publication date
WO2024023095A1 (fr) 2024-02-01

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