EP0073537B1 - Support du conduit d'évacuation des gaz d'un four à arc - Google Patents

Support du conduit d'évacuation des gaz d'un four à arc Download PDF

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Publication number
EP0073537B1
EP0073537B1 EP82201011A EP82201011A EP0073537B1 EP 0073537 B1 EP0073537 B1 EP 0073537B1 EP 82201011 A EP82201011 A EP 82201011A EP 82201011 A EP82201011 A EP 82201011A EP 0073537 B1 EP0073537 B1 EP 0073537B1
Authority
EP
European Patent Office
Prior art keywords
cover
furnace
guide
arc furnace
connection piece
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
Application number
EP82201011A
Other languages
German (de)
English (en)
Other versions
EP0073537A1 (fr
Inventor
Karl Bühler
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT82201011T priority Critical patent/ATE14790T1/de
Publication of EP0073537A1 publication Critical patent/EP0073537A1/fr
Application granted granted Critical
Publication of EP0073537B1 publication Critical patent/EP0073537B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
    • F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
    • F27D17/002—Details of the installations, e.g. fume conduits or seals

Definitions

  • the invention relates to an electric arc furnace with a furnace, a furnace cover with a cover ring and a cover lifting and swiveling device, a cover hole for the flue gas extraction from the interior of the furnace being carried out in the furnace cover and a flue gas extraction nozzle arranged for the continuation of the flue gases above the cover hole.
  • the constructive design of the flue gas extraction nozzle and in particular its assignment to the electric arc furnace are of greater importance because it represents the connecting link in the flue gas detection system between the movable furnace vessel and the stationary installed flue pipe and secondly has to be fully integrated into the individual work operations of the furnace operation.
  • the extraction nozzle is attached to the upper furnace (cover lifting device).
  • the lower end of the nozzle is located above the cover hole at a distance that is slightly larger than that of a cover lift.
  • the free space between the furnace cover and the extraction nozzle is closed by a cylindrical transition piece, the so-called collar, into which the lower end of the extraction nozzle protrudes telescopically on its upper side and the lower end of the collar is supported on the furnace cover above the cover hole.
  • the collar is made of heat-resistant steel sheet and has no significant weight. Since the lower part of the collar is subjected to high thermal stress, it is normally water-cooled to prevent scaling and warping. However, an additional cooling circuit with monitoring and control devices is required for this. When lifting the cover, the collar is either lifted by an additional lifting device or, since it rests freely on the furnace cover, is also lifted by it.
  • the suction nozzle and thus also the collar are arranged perpendicular to the curved surface of the lid and normally form an angle of 18-20 degrees with the lid axis.
  • the lid lifting direction and the sliding direction of the collar deviate by this angular amount and lateral forces occur which are transferred to the lid arch.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, achieves the object of creating an arc furnace with direct extraction of the exhaust gases by means of a flue gas extraction connection, with which the exhaust gases are optimally recorded and which can be integrated in a simple and economical manner into the work operations of the arc furnace, in that the nozzle is supported on the furnace cover ring.
  • the socket is supported on the cover ring in a non-positive or positive manner, so that it remains immovably fixed on the cover ring when the furnace is tilted or when the cover is pivoted.
  • the nozzle is provided with a guide arrangement which interacts with the cover lifting and pivoting device in such a way that the nozzle is guided when the cover is lifted and is supported when the furnace is tilted.
  • This constructive measure eliminates the need for positive and form-fitting support of the nozzle on the cover ring in the tilting direction for pouring out or emptying the furnace.
  • the guide assembly contains on the one hand at least one guide rail running in the lifting direction of the furnace cover, and on the other hand at least a few guide rollers.
  • the guide rail is guided between two guide rollers.
  • the guide rail is firmly connected to the support arm of the lid lifting device and the guide rollers are firmly connected to the nozzle.
  • the guide rail is firmly connected to the socket and the guide rollers are firmly connected to the support arm of the lid lifting device.
  • the guide assembly contains at least a pair of guide levers which are articulated with the same ends to the support arm of the lid lifting device and with the other ends to the nozzle and the support of the nozzle on the cover ring is carried out via at least one further lever.
  • the guide lever are of equal length and are arranged in parallel.
  • the guide arrangement according to claims 7 and 8 has the advantage that the guide rollers can be omitted.
  • the guide arrangement comprises a locking device for securing the nozzle in a raised position.
  • the constructive measure according to claim 9 enables the cover to be separated from the connector since the connector remains guided and locked in the lid lifting and swiveling device after it has been locked, and the necessary work operations, for example changing the lid or repairs to the lid, are carried out with the lid, regardless of the connector can be.
  • the guide arrangement and / or the locking device are arranged symmetrically on both sides of the nozzle.
  • the advantage according to claim 10 is that the form-fitting and non-positive support of the connector on the cover ring can be dispensed with completely, since the connector is guided in both tilting directions of the furnace.
  • the arc furnace 1 with furnace cover 5 is mounted in an opening on the platform 6, which is supported on two roller cradles 7, which in turn are supported on the weighing beams 8, which are firmly anchored to the foundation 9.
  • the pouring spout 2 can also be seen in FIG. 1.
  • a movable rotary console 10 is arranged on the platform 6, to which the cover lifting and swiveling device 11 is fastened.
  • the cover lifting and swiveling device 11 consists of a support arm 13 and a support arm column 12.
  • the platform 6 also carries three electrode positioning columns 14, of which only one is visible in FIG. 1.
  • the electrode adjusting columns 14 are hydraulically connected to be movable individually in the vertical direction with electrode adjusting cylinders 15.
  • the electrode support arms 16 are fastened to the electrode adjusting columns 14 and the electrodes 18 are held in electrode holders 17 at their outer ends.
  • FIG. 2 shows a schematic top view of the furnace according to FIG. 1.
  • FIG. 1 The reference numerals from FIG. 1 apply to the same parts for FIG. 2 as for the other drawings.
  • U-shaped profile beams 30 are fastened to the double-T profile beams 29 perpendicularly to them, between which the connecting piece 19 is arranged.
  • the guide rail 21 is located between the profile beams 30 and the connecting piece.
  • the slag door 27 is attached to the furnace boiler 1.
  • the electrode adjusting columns 14 are arranged on the rotary console 10, which, as described in detail in FIG. 1, have electrode support arms 16, on the outer ends of which the electrodes 18 are held in electrode holders 17.
  • the electrode positioning columns 14 are also located on the rotary console 10, they are also pivoted out, and in order to be able to carry out this pivoting operation at all, it goes without saying that the electrodes are first pulled over the upper edge of the furnace boiler 1.
  • FIG. 1 shows a schematic side view of the furnace according to FIG. 1.
  • the flue gas suction nozzle 19, which is located within the symmetrically arranged guide rails 21, is supported on the cover ring 4 by the support 36 and the foot 37.
  • FIG. 4 shows an enlarged, vertical and partial section through the front view of a flue gas extraction connector 19 including a first variant of an exemplary embodiment of a guide arrangement 21, 38 and a locking device 39, 42 for the connector 19.
  • the flange 19 with its flange 34 is positioned genetically above the cover hole 33, a gap 35 being located between the cover lining 31 and the flange 34 of the nozzle 19.
  • the socket 19 is exactly in alignment with the fixed flue gas discharge shaft 43.
  • the gap 51 is provided between the flue gas discharge shaft 43 and the flange 20 of the socket 19.
  • the two stomata 35 and 51 ensure that the connector 19 does not abut the brick lining 31 and the flue gas duct 43 neither in its static position nor when it is lifted.
  • the columns 35 and 41 are dimensioned such that the external air supply is kept to a minimum with sufficient scope for the lifting maneuver of the nozzle 19.
  • the nozzle 19 is supported with its entire mass on the support 36 and the foot 37 of the support 36 on the cover ring 4.
  • the cover ring 4 lies on the cover support ring 3, which is firmly connected to the furnace vessel 1.
  • the refractory lining 32 is located within the furnace vessel 1.
  • the nozzle 19 is guided by the guide arrangement, which consists of guide rail 21 and guide rollers 38, when lifting the nozzle 19 or the furnace cover 5 and supported when the furnace is tilted.
  • the guide rail 21 is fixedly connected to the support arm 13 of the lid lifting and pivoting device 11 by the U-profile carrier 30 and double-T profile carrier 29.
  • the support arm 13 is only shown schematically in FIG.
  • a reinforcing plate 40 is additionally attached.
  • the guide rollers 38 are firmly connected to the socket 19 and the guide rail 21 is guided between two pairs of guide rollers 38.
  • FIG. 5 shows the enlarged, vertical partial section V-V according to FIG. 4.
  • the support edge 38 secures the guide rollers 38 and thus also the socket 19 against lateral displacement.
  • the locking device 39, 42 ' can be seen, which secures the nozzle 19 in a raised position. It consists of the displaceable pin 39, which is arranged in the bore 21 'of the guide rail 21, and of the bore 42' within the projecting eye 42 of the connector 19.
  • the cover 5 is now separated in the swiveled-out position on the cover replacement site from the socket 19 by simply lowering the cover 5 and the socket 19 remains guided and locked in the support arm 13 of the cover lifting and pivoting device 11.
  • the cover 5 separated from the socket 19 can now be opened completely the lid replacement area can be lowered and replaced.
  • the new cover 5 is raised by the support ropes 23 until the connector 19 is completely supported on the cover ring 4 of the cover 5.
  • the displaceable pin 39 is removed from the bore 42 'of the projecting eye 42 in the socket, the cover 5 together with the socket 19 is pivoted back into the starting position and the cover 5 and socket 19 are placed together on the cover support ring 3 of the furnace vessel 1 and the melting process can start again.
  • FIG. 6 shows an enlarged, vertical partial section through the front view of a connecting piece 19 including a second exemplary variant of a guide arrangement 47, 47 'and locking device 39, 42'.
  • the socket 19 is supported with its mass completely on the cover ring 4 via a further lever 44 and a U-profile carrier 45, which serves as a foundation for the lever 44.
  • the lever 44 is fixedly connected to the U-profile support by the connecting piece 46, the lever 44 and connecting piece 46 in turn being connected to one another in an articulated manner by means of bolts 49 "and 49" '.
  • the guide of the connecting piece 19 consists of two guide levers 47, 47 ', which are connected to the support arm 13 of the cover lifting and pivoting device 11 by means of connecting ends 48, U-shaped profile supports 30 and double-T profile supports 29 having the same ends .
  • the support arm 13 is only shown schematically in FIG. 6.
  • the connection of the rectified ends of the guide levers 47, 47 'to the connecting bracket 48 is articulated, since it is carried out by movably mounted bolts 49.
  • the other ends of the guide levers 47, 47 ' are in turn connected to the connecting piece 19 by movably mounted bolts 49'.
  • the connection of the guide lever 47 to the socket 19 is covered by the mounting bracket 50 and thus not visible.
  • the locking device 39, 42 ' consists of the displaceable pin 39 which is arranged in a hole in the fastening bracket 50 which is not visible in FIG. 6.
  • the mounting bracket 50 is connected with its widened lower part 50 'firmly to the U-section support 30, the double-T section support 29 and the support arm 13 of the cover lifting and pivoting device 11.
  • the forces are transmitted via the U-shaped support 45, the connecting piece 46 and the further lever 44 to the connecting piece 19 and this is also lifted and relative moved to the support arm 13 of the lid lifting and pivoting device 11 and guided by the guide levers 47, 47 '.
  • the guide levers 47, 47 ' are arranged in parallel and have the same length, the connecting piece 19 is guided at right angles to the support arm 13 when it is lifted and in an arc with the radius of the length of the guide levers 47 and 47' from the pin bearing 49 to the pin bearing 49 ' swung out to the left. Therefore, the further lever 44 is articulated both on the socket with the bolt 49 "and on the connecting piece 46 with the bolt 49" ', so that the lever 44 can follow the slight movement of the socket 19 in the left direction when the socket 19 is raised .
  • the bore 42 'in the projecting eye 42 of the socket 19 is moved to the left once in the vertical direction and on the other hand in the horizontal direction by the amount AS and if the bore in the connection bracket 50' is congruent, in which the sliding pin 39 is arranged, with the bore 42 ', the pin 39 can be inserted into the bore 42'.
  • the connector 19 remains guided and locked in the support arm 13 of the cover lifting and pivoting device 11 after the cover 5 has been lowered again and thus separated from the connector 19.

Claims (10)

1. Four à arc électrique comprenant une cuve de four (1), un couvercle de four (5) avec une ceinture de couvercle (4), ainsi qu'une installation (11) de levage et de pivotement du couvercle, dans lequel il est prévu, dans le couvercle de four (5), un orifice (33) d'évacuation de la fumée de l'intérieur du four et, au-dessus de l'orifice (33), une tubulure (19) d'aspiration de la fumée pour le rejet de cette fumée, caractérisé en ce que la tubulure (19) est appuyée sur la ceinture (4) du couvercle de four.
2. Four à arc électrique suivant la revendication 1, caractérisé en ce que la tubulure (19) est pourvue d'un système de guidage (21, 38 ; 47, 47'), qui coopère avec l'installation (11) de levage et de pivotement du couvercle de telle façon que la tubulure (19) soit guidée lors du levage et appuyée lors du basculement du four.
3. Four à arc électrique suivant la revendication 2, caractérisé en ce que le système de guidage (21, 38) comporte d'une part au moins un rail de guidage (21) dirigé selon la direction de levage du couvercle de four (5) et d'autre part au moins une paire de galets de guidage (38).
4. Four à arc électrique suivant la revendication 3, caractérisé en ce que le rail de guidage (21) est guidé entre deux galets de guidage (38).
5. Four à arc électrique suivant l'une des revendications 2 à 4, caractérisé en ce que le rail de guidage (21) est fixé au bras porteur (13) de l'installation (11) de levage du couvercle, et en ce que les galets de guidage (38) sont fixés à la. tubulure (19).
6. Four à arc électrique suivant l'une des revendications 2 à 4, caractérisé en ce que le rail de guidage (21) est fixé à la tubulure (19) et en ce que les galets de guidage (38) sont fixés au bras porteur (13) de l'installation (11) de levage du couvercle.
7. Four à arc électrique suivant la revendication 2, caractérisé en ce que le système de guidage (47, 47') comporte au moins une paire de leviers de guidage (47, 47') qui sont articulés, par leurs extrémités identiquement orientées, au bras porteur (13) de l'installation (11) de levage du couvercle et à la tubulure (19) par leurs autres extrémités, et en ce que l'appui de la tubulure (19) sur la ceinture de couvercle (4) est assuré au moyen d'au moins un levier supplémentaire (44).
8. Four à arc électrique suivant la revendication 7, caractérisé en ce que les leviers de guidage (47, 47') ont la même longueur et sont disposés parallèlement.
9. Four à arc électrique suivant l'une des revendications 2 à 8, caractérisé en ce que le système de guidage (21, 38 ; 47, 47') comporte un dispositif d'arrêt (39, 42') assurant la sécurité de la tubulure (19) en position levée.
10. Four à arc électrique suivant une ou plusieurs des revendications 2 à 9, caractérisé en ce que le système de guidage (21, 38 ; 47, 47') et/ou le dispositif d'arrêt (39, 42') sont disposés symétriquement, de part et d'autre de la tubulure (19).
EP82201011A 1981-09-01 1982-08-12 Support du conduit d'évacuation des gaz d'un four à arc Expired EP0073537B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82201011T ATE14790T1 (de) 1981-09-01 1982-08-12 Gasabsaugstutzen fuer lichtbogenoefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH561581 1981-09-01
CH5615/81 1981-09-01

Publications (2)

Publication Number Publication Date
EP0073537A1 EP0073537A1 (fr) 1983-03-09
EP0073537B1 true EP0073537B1 (fr) 1985-08-07

Family

ID=4296567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82201011A Expired EP0073537B1 (fr) 1981-09-01 1982-08-12 Support du conduit d'évacuation des gaz d'un four à arc

Country Status (5)

Country Link
US (1) US4476564A (fr)
EP (1) EP0073537B1 (fr)
AT (1) ATE14790T1 (fr)
BR (1) BR8205064A (fr)
DE (1) DE3265228D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387455B (de) * 1987-05-15 1989-01-25 Voest Alpine Ag Elektroofen, wie lichtbogenofen oder plasmaofen
DE4138120A1 (de) * 1991-11-19 1993-05-27 Fuchs Technology Ag Einschmelzaggregat mit ofenwiege
DE102010041692A1 (de) * 2010-09-30 2012-04-05 Siemens Aktiengesellschaft Hub- und Schwenkvorrichtung für einen Deckel eines Ofens sowie Ofenanlage und Verfahren zum Chargieren und zur Wartung einer solchen Ofenanlage
CN105004190A (zh) * 2014-10-23 2015-10-28 铜陵翔宇商贸有限公司 设有精确控温余热利用装置的转炉
TWI663674B (zh) * 2017-07-25 2019-06-21 漢民科技股份有限公司 用於半導體製程之腔體蓋與頂板之組合體及成膜裝置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173980A (en) * 1962-11-21 1965-03-16 Wheelabrator Corp Furnace dust and fume collection system
US3428301A (en) * 1967-10-02 1969-02-18 Pullman Inc Lifting arrangement for a furnace fume elbow and the like
US3772448A (en) * 1973-02-05 1973-11-13 Laclede Steel Co Smoke elbow for electric furnace

Also Published As

Publication number Publication date
DE3265228D1 (en) 1985-09-12
BR8205064A (pt) 1983-08-09
ATE14790T1 (de) 1985-08-15
US4476564A (en) 1984-10-09
EP0073537A1 (fr) 1983-03-09

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