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WO2001000885A1 - Procede et dispositif pour actionner un four a arc presentant un puits interieur - Google Patents

Procede et dispositif pour actionner un four a arc presentant un puits interieur Download PDF

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Publication number
WO2001000885A1
WO2001000885A1 PCT/DE2000/002042 DE0002042W WO0100885A1 WO 2001000885 A1 WO2001000885 A1 WO 2001000885A1 DE 0002042 W DE0002042 W DE 0002042W WO 0100885 A1 WO0100885 A1 WO 0100885A1
Authority
WO
WIPO (PCT)
Prior art keywords
block
metallurgical vessel
slag
inner shaft
vessel according
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.)
Ceased
Application number
PCT/DE2000/002042
Other languages
German (de)
English (en)
Inventor
Peter Meierling
Uwe Mager
Bernhard Espendiller
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Priority to AU64257/00A priority Critical patent/AU6425700A/en
Publication of WO2001000885A1 publication Critical patent/WO2001000885A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • 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
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • 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
    • 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
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • 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
    • 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
    • F27B3/24—Cooling arrangements
    • 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
    • F27D3/14—Charging or discharging liquid or molten material
    • 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
    • F27D3/18—Charging particulate material using a fluid carrier

Definitions

  • the invention relates to a metallurgical vessel with a closable bottom tapping opening and with an inner shaft arranged coaxially with the outer shaft of a slag door, in which at least one vertically movable, current-carrying electrode is provided, and a method for tapping the melt out of the vessel
  • DE 197 53 184 A1 discloses a metallurgical vessel with a lower vessel lined with refractory material, in the bottom of which a tap hole is provided and an upper vessel which can be closed by a lid, in which a central tube is provided coaxially with the main axis of the furnace, in which at least an electrode is arranged, an axially displaceable apron being provided at least at the head end on the central tube, which is arranged coaxially to the central axis of the open and parallel to the axis of the electrodes and the mouth of which points towards the bottom of the vessel
  • This apron is particularly subject to wear and tear at the temperatures prevailing in this area of the furnace during the operating phase
  • DE 33 16 366 A1 discloses a furnace vessel for a direct current arc furnace with a contact device provided in the center region of the bottom of the vessel for deriving the anode current, this contact device consisting of refractory metal electrode pins which penetrate from below through refractory perforated parts provided in the bottom of the vessel The pins are firmly fitted in the perforated stones so that no melt flows out of the bottom of the furnace vessel. The pins are therefore not freely movable in the holes
  • the aim of the invention is to provide a device and a manufacturing method for an inner shaft part and a method for parting off a metallurgical vessel with structurally simple means, which ensures safe, low-maintenance operation
  • At least a part of the furnace vessel having an inner shaft is a cylindrical block constructed from refractory material. This block has the number of those projecting into the furnace vessel from above
  • Electrode bores The block is suspended from holding devices with which the head end of the block can be positioned in the furnace shaft.
  • a region of the cylindrical block projects into the inner shaft, which is designed as a metallic tube, at least as a ring
  • not only electrodes but also instead of these lances can be passed through the bores of the refractory block.
  • These lances can be used as inflation lances if, for example, the metallurgical vessel is operated in the manner of a converter
  • the block made of refractory material In order to keep the weight of the block made of refractory material as low as possible, it has a length L B which is between 0.5 to 3 0 x the diameter D B of the block
  • the dimensions of both the electrodes or lances in relation to the bores and the outer diameter of the block relative to the metallic part of the inner shaft are selected so that an unimpeded lateral relative movement is possible
  • the block is fastened to three rope-shaped support elements, for example made of chains.
  • the block can not only be centered, but also moved exactly in its vertical direction
  • the block is held by means of a centrally arranged support rod
  • a support arm is provided to which at least one electrode is fastened.
  • the support arm is guided out of the furnace shaft via a slot and fastened there to a support column.
  • This support column is guided vertically upwards and fastened to a stage of the steelworks hall.
  • a further embodiment is provided for the electrode holder, in which the support arm can be displaced horizontally.
  • This embodiment makes it possible to completely release the electrodes after removal from the bores of the refractory block. Lances can be introduced into the openings that become free, via which oxygen can be inflated onto the charge when the metallurgical vessel is used as a converter
  • the metallurgical vessel is fixed and in the bottom of the metallurgical vessel
  • the tapping opening is arranged outside the shadow region of the inner shaft
  • a horizontal slag threshold is provided for the defined removal of the slag, which consists of a refractory block, in particular
  • Graphite is built up, which has a radial cutout.
  • the cylinder is connected to an actuator with which it can be rotated about its longitudinal axis.
  • the vertical displacement of the block makes it possible to lower it into the melt. This allows the level of the melt to be set in a simple manner. This applies both to the possibility of the exact removal , especially in combination with the rotatable slag threshold, the slag as well as in relation to the metallic melt.
  • the reaction gases rising between the inner and the outer shaft are used for preheating the scrap.
  • the electrodes are to be protected from the scrap falling into the annular charging space.
  • a block according to the invention is used for this purpose, which does not require any cooling, in particular water, which requires no cooling, in particular water Monitoring of the cooling water is therefore no longer necessary
  • This block made of refractory material is subject to both mechanical and thermal wear.
  • the block which can be moved vertically on chains or on a rod by means of actuators is held or moved into a position in which its rear end face is freely accessible
  • plates preferably sheet metal jackets, are attached.
  • refractory material is filled in.
  • This refractory material is - especially after being lowered of the block in its working position - thermally solidified
  • tixotropic masses are used. These masses are shaken and have a firm consistency after this treatment
  • the volume of the block lost due to wear can be refilled in a particularly simple manner, especially since the block can be moved in any manner up to a suspension on the chains or rods and can also be built up at any time
  • An example of the invention is shown in the accompanying drawing
  • Figure 1 shows a section through the metallurgical vessel
  • FIG. 1 shows a metallurgical vessel 11 which has a vessel bottom 12 with a tap opening 13 which can be closed by a closure device 81.
  • this is a knife gate valve which can be driven by an actuator 54 in the region of the vessel bottom 12 in addition, a slag threshold 91 is arranged which can be operated by an actuator 55
  • the metallurgical vessel 11 has an outer shaft 14 and an inner shaft 21 arranged coaxially therewith.
  • a cylindrical block 23 is provided in the mouth region of the inner shaft 21 and is held on chains 63, 64.
  • the chains 63, 64 are connected at one end to an actuator 52 and at the other end firmly connected to block 23
  • Block 23 is made of refractory material and has holes 24
  • Rod-shaped components can be guided through these bores.
  • a lance 41 is guided through the bore 24, which is connected at the other end to an oxygen demand station 44 and at the same time can be displaced in its vertical position via an actuator 56
  • an electrode 31 is guided through the bore 24 of the block 23.
  • this electrode 31 is held by a support arm 34 which is attached to a support column 35 and which is guided vertically upwards and via an actuator 51 is vertically and horizontally movable by an actuator 57.
  • the support arm 34 is guided through a slot 17, which connects the inner shaft 21 to the outer shaft 14
  • plates 25 are attached to the outer edges of block 23 and to the edges of bore 24.
  • a refractory mass T can be filled in the remaining space of block 23 enlarge and thus fill up the volume loss due to wear on the mouth side.
  • the length of the block before filling is marked with L 8.
  • the diameter of the block is marked with D a , where D B ⁇ is the inner diameter D s of the inner shaft 21
  • an opening 18 is provided, which is connected via a connection 72 to a lime transfer station 71. Furthermore, there is the possibility of leading a dust gap 73 through the opening 18 and thus of targeted lime dust into the inner region of the metallurgical vessel 11 bring in
  • Figure 2 shows a section of the metallic vessel 1 1, in the lower
  • a tap opening 13 is provided, which is closed by a closing device 81 that can be operated via an actuator 54. Furthermore, a slag threshold 91 is arranged in the area of the slag door 15, which has a cutout 92 has.
  • the block 23 is held over a rod 62, which by a
  • Actuator 53 is movable in the vertical direction
  • FIG. 3 shows a side view and a top view of a slag threshold 91 which has a cutout 92.
  • the slag threshold is guided in a guide 94 and can be rotated by an actuator 55 in the upper part of the figure a refractory mass 93 has been filled in front of the cylindrical slag threshold 91, which serves to protect a slag threshold 91 constructed from graphite.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

L'invention concerne une cuve métallurgique comportant une ouverture de trou de culée pouvant être fermée et un puits intérieur disposé coaxialement à un puits extérieur de la carcasse du four, qui présente une porte extérieure. Au moins une électrode conduisant du courant peut être déplacée verticalement dans le puits intérieur. Au moins une partie du puits intérieur (21) consiste en un bloc (23) cylindrique réalisé dans un matériau réfractaire. Dans ledit bloc (23), il est prévu au moins un alésage (24) à travers lequel peuvent être guidés des éléments (31 à 33, 41 à 43) sous forme de tiges, à contour extérieur cylindrique. Des dispositifs de retenue (62 à 65) reliés à des actionneurs (52, 53) permettent de positionner l'extrémité de la tête du bloc (23) dans le puits intérieur (21).
PCT/DE2000/002042 1999-06-28 2000-06-27 Procede et dispositif pour actionner un four a arc presentant un puits interieur Ceased WO2001000885A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU64257/00A AU6425700A (en) 1999-06-28 2000-06-27 Device and method for operating an arc furnace which comprises an inner shaft

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999130538 DE19930538C1 (de) 1999-06-28 1999-06-28 Vorrichtung und Verfahren zum Betreiben eines einen Innenschacht aufweisenden Lichtbogenofens
DE19930538.2 1999-06-28

Publications (1)

Publication Number Publication Date
WO2001000885A1 true WO2001000885A1 (fr) 2001-01-04

Family

ID=7913418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/002042 Ceased WO2001000885A1 (fr) 1999-06-28 2000-06-27 Procede et dispositif pour actionner un four a arc presentant un puits interieur

Country Status (3)

Country Link
AU (1) AU6425700A (fr)
DE (1) DE19930538C1 (fr)
WO (1) WO2001000885A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB226801A (en) * 1923-12-24 1925-08-20 Vacuumschmelze Gmbh Process for the production and repair of refractory linings for hearths of metallurgical and other furnaces
GB920674A (en) * 1961-01-18 1963-03-13 Birlec Efco Melting Ltd Improvements in or relating to metal melting furnaces
EP0770690A2 (fr) * 1995-10-25 1997-05-02 MANNESMANN Aktiengesellschaft Procédé et dispositif pour traiter les résidus de ferrailles
DE19753184A1 (de) * 1997-11-21 1999-06-10 Mannesmann Ag Schmelzofenanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316366C2 (de) * 1983-05-05 1985-10-17 Mannesmann AG, 4000 Düsseldorf Ofengefäß für einen Gleichstrom-Lichtbogenofen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB226801A (en) * 1923-12-24 1925-08-20 Vacuumschmelze Gmbh Process for the production and repair of refractory linings for hearths of metallurgical and other furnaces
GB920674A (en) * 1961-01-18 1963-03-13 Birlec Efco Melting Ltd Improvements in or relating to metal melting furnaces
EP0770690A2 (fr) * 1995-10-25 1997-05-02 MANNESMANN Aktiengesellschaft Procédé et dispositif pour traiter les résidus de ferrailles
DE19753184A1 (de) * 1997-11-21 1999-06-10 Mannesmann Ag Schmelzofenanlage

Also Published As

Publication number Publication date
DE19930538C1 (de) 2000-12-14
AU6425700A (en) 2001-01-31

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