EP0077319A1 - Four électrique - Google Patents

Four électrique Download PDF

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Publication number
EP0077319A1
EP0077319A1 EP82890136A EP82890136A EP0077319A1 EP 0077319 A1 EP0077319 A1 EP 0077319A1 EP 82890136 A EP82890136 A EP 82890136A EP 82890136 A EP82890136 A EP 82890136A EP 0077319 A1 EP0077319 A1 EP 0077319A1
Authority
EP
European Patent Office
Prior art keywords
lifting
lifting column
furnace
supporting pin
lifting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82890136A
Other languages
German (de)
English (en)
Other versions
EP0077319B1 (fr
Inventor
Ernst Riegler
Ernst Zajicek
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
Voestalpine 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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0077319A1 publication Critical patent/EP0077319A1/fr
Application granted granted Critical
Publication of EP0077319B1 publication Critical patent/EP0077319B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • 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
    • F27B3/12—Working chambers or casings; Supports therefor
    • F27B3/16—Walls; Roofs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/04—Object engaging heads for jacks

Definitions

  • the invention relates to an electric furnace, such as an arc furnace or a plasma melting furnace, with a lifting mechanism that actuates a furnace cover, which has a fixed supporting pin, a lifting device arranged within the fixed supporting pin, and an axially displaceably guided on the fixed supporting pin by means of an upper and a lower bearing and lifted by means of the lifting device and has lowerable lifting column which can be brought into and out of engagement with the furnace cover.
  • a lifting mechanism that actuates a furnace cover, which has a fixed supporting pin, a lifting device arranged within the fixed supporting pin, and an axially displaceably guided on the fixed supporting pin by means of an upper and a lower bearing and lifted by means of the lifting device and has lowerable lifting column which can be brought into and out of engagement with the furnace cover.
  • the invention aims to avoid these disadvantages and difficulties and has as its object one To create an electric furnace of the type described above, which has a hoist that allows either a low overall height in comparison to the above-described hoist or, compared to this hoist with the same overall height, significantly lower forces in the bearings of the lifting column.
  • the hollow lifting column surrounds the stationary support pin peripherally and that the lifting device, preferably a double-acting hydraulic cylinder, on the one hand articulated with an end plate closing the lifting column at its upper end and on the other hand with a fixed part of the system, such as the Foundation or the fixed support pin, is articulated.
  • the lifting device preferably a double-acting hydraulic cylinder
  • Fig. 1 shows a plasma melting plant in side view
  • Fig. 2 in plan. 3 and 4 show a section through the lid lifting mechanism, etc. once (Fig. 3) in the lowered and once (Fig. 4) in the raised position of the lid.
  • An upper part 1 of a plasma melting furnace in particular a plasma primary melting furnace, is provided with a cover 2, which is supported by a cover supporting structure 3.
  • a flue gas manifold 4 projects from the cover to a suction device, not shown.
  • the lid lifting mechanism 5 and the lid pivoting mechanism 6 are arranged laterally next to the furnace upper part 1.
  • the furnace lower part 7 rests with weighing beams 8 on raceways 9 supported on the foundation 10.
  • the cover lifting mechanism 5 has a rigidly connected to the foundation 10, e.g. screwed hollow support pin 15 which is arranged within a hollow sleeve-shaped lifting column 16. Between the lifting column 16 and the support pin 15, a lifting, lowering and pivoting of the lifting column 16 on the support pin 15 is made possible by bearings 17, 18, which are designed as bearing bushes, advantageously as bronze sliding bearing bushes. The bearing bushes are fastened to the lifting column 16 and slide when the lifting column 16 moves relative to the stationary support pin 15 along slideways 19, 20 provided thereon.
  • the lifting column 16 is closed at its upper end with an end plate 21.
  • This end plate has on the outside a conical load bearing 22, which is in the lowered position of the cover structure 3 and the lifting column 16 at a distance 23 below the cover structure'3, so that on the one hand no vibrations of the cover structure 3 can be transmitted to the cover lifting mechanism 5 during the melting process or, on the other hand, the furnace vessel 1, 7 can be tilted freely into the pouring or deslagging position.
  • the load bearing 22 projects into a corresponding recess 24 in the cover structure 3.
  • An inclined surface 26 provided near the lower end 25 of the lifting column 16 comes into engagement with a corresponding counter-inclined surface 27, which is arranged on a vertical upright 28 of the cover supporting structure 3, during the lifting.
  • the vertical upright 28 seated on the lower furnace part 7 in the lowered position of the cover structure projects with a bolt 29 arranged at its lower end when the cover structure 3 is in the lowered position in a corresponding recess 30 of the lower furnace part 7.
  • the upper (17) of the bearing bushes 17, 18 is in the lowered position of the lifting column 16 at a distance 31 below a radially outwardly projecting annular flange 32 of the support pin 15, which distance corresponds at least to the lifting height of the lifting column 16.
  • the lower bearing bush 18 is arranged at the lower end of the lifting column 16 and is held by an annular flange 34 which projects radially inwards and is provided with a seal 33.
  • the annular space 36 present between the bearing bushes 17, 18, which are spaced as far apart as possible 35, is filled with lubricant, which is constantly changing located in this annulus.
  • This has the advantage that a highly viscous oil can be used, which ensures a correspondingly long service life of the bearing bushes 17, 18.
  • the bearing bushes expediently have conical inlet and outlet surfaces, not shown, which run obliquely to form a lubricating film.
  • a hydraulic cylinder 38 is arranged in the cavity 37 of the support pin 15 and is connected in an articulated manner with its lower end to the foundation 10 and with the upper end of the piston 39 to the end plate 21.
  • the lower end could also be connected in an articulated manner to the flange 40 projecting radially from the stationary support pin 15 if it continues inwards.
  • the hydraulic cylinder 39 is double-acting, so that the lifting column can be lowered with the help of the hydraulic cylinder until the conical load bearing 22 comes out of engagement from the corresponding recess 24 of the cover structure 3.
  • the arrangement of the bearing bushes 17, 18 at the greatest possible distance 35 and as close as possible to the ends of the fixed support pin results in a low overall height for the support pin and thus a relatively low weight and high rigidity of the construction, while the bearing load is still acceptable. Furthermore, it is possible to move very far apart for a given overall height with the bearing bushes 17, 18, taking advantage of the overall height, so that the forces occurring on the bearing bushes 17, 18 caused by the cover 2 with the cover supporting structure 3 can be kept low.
  • the hydraulic cylinder could be replaced by another lifting device, for example a screw spindle, rack, etc., but it is hydraulic cylinder because of the limited space inside the support pin 15 with respect to assembly and repairs of particular advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP82890136A 1981-10-09 1982-09-27 Four électrique Expired EP0077319B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4348/81 1981-10-09
AT0434881A AT371921B (de) 1981-10-09 1981-10-09 Elektroofen

Publications (2)

Publication Number Publication Date
EP0077319A1 true EP0077319A1 (fr) 1983-04-20
EP0077319B1 EP0077319B1 (fr) 1985-12-27

Family

ID=3562841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890136A Expired EP0077319B1 (fr) 1981-10-09 1982-09-27 Four électrique

Country Status (7)

Country Link
US (1) US4437187A (fr)
EP (1) EP0077319B1 (fr)
JP (1) JPS5872875A (fr)
AT (1) AT371921B (fr)
BR (1) BR8205900A (fr)
CA (1) CA1193304A (fr)
DE (1) DE3268166D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514293A1 (de) * 1985-04-19 1986-10-30 Fuchs Systemtechnik GmbH, 7601 Willstätt Hub- und schwenkvorrichtung fuer den deckel des ofengefaesses eines lichtbogenofens
WO1993010413A1 (fr) * 1991-11-19 1993-05-27 Fuchs Technology Ag Unite de fusion avec berceau de four
WO2009153026A1 (fr) 2008-06-18 2009-12-23 Fuchs Technology Holding Ag Portique rotatif pour un four
DE102010041694A1 (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
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
US10211811B2 (en) 2016-05-12 2019-02-19 Huawei Technologies Co., Ltd. Tunable filter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153375A (ja) * 1984-12-26 1986-07-12 新日本製鐵株式会社 ア−ク炉の油圧駆動装置の運転方法
AT387350B (de) * 1987-05-15 1989-01-10 Voest Alpine Ag Elektroofen, wie lichtbogenofen oder plasmaofen
EP2685192A1 (fr) * 2012-07-11 2014-01-15 Siemens VAI Metals Technologies GmbH Four à arc

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1290741A (fr) * 1961-06-02 1962-04-13 Cie Constr Gros Mat Electromec Dispositif d'équilibrage du système porte-électrodes des fours à arc à régulation électrique
DE1508471A1 (de) * 1966-12-28 1970-01-15 Demag Elektrometallurgie Gmbh Selbsttaetige Verriegelung
GB2033863A (en) * 1978-10-04 1980-05-29 Bbc Brown Boveri & Cie Lifting and swivelling device for the cover of a furnace

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT370871B (de) * 1981-01-08 1983-05-10 Voest Alpine Ag Elektroofen, wie lichtbogenofen oder plasmaschmelzofen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1290741A (fr) * 1961-06-02 1962-04-13 Cie Constr Gros Mat Electromec Dispositif d'équilibrage du système porte-électrodes des fours à arc à régulation électrique
DE1508471A1 (de) * 1966-12-28 1970-01-15 Demag Elektrometallurgie Gmbh Selbsttaetige Verriegelung
GB2033863A (en) * 1978-10-04 1980-05-29 Bbc Brown Boveri & Cie Lifting and swivelling device for the cover of a furnace

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514293A1 (de) * 1985-04-19 1986-10-30 Fuchs Systemtechnik GmbH, 7601 Willstätt Hub- und schwenkvorrichtung fuer den deckel des ofengefaesses eines lichtbogenofens
WO1993010413A1 (fr) * 1991-11-19 1993-05-27 Fuchs Technology Ag Unite de fusion avec berceau de four
US5393037A (en) * 1991-11-19 1995-02-28 Fuchs Technology Ag Smelting unit with furnace rocking cradle
WO2009153026A1 (fr) 2008-06-18 2009-12-23 Fuchs Technology Holding Ag Portique rotatif pour un four
DE102008028966A1 (de) 2008-06-18 2009-12-24 Fuchs Technology Holding Ag Drehportal für einen Ofen
DE102010041694A1 (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
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
WO2012041947A1 (fr) 2010-09-30 2012-04-05 Siemens Aktiengesellschaft Dispositif de levage et de pivotement pour un couvercle d'un four ainsi qu'installation de four et procédé pour charger et pour entretenir une telle installation de four
US9429363B2 (en) 2010-09-30 2016-08-30 Primetals Technologies Austria GmbH Lift and pivot device for a cover of a furnace and furnace system and method for charging and servicing such a furnace system
US10211811B2 (en) 2016-05-12 2019-02-19 Huawei Technologies Co., Ltd. Tunable filter

Also Published As

Publication number Publication date
CA1193304A (fr) 1985-09-10
JPS6327634B2 (fr) 1988-06-03
DE3268166D1 (en) 1986-02-06
EP0077319B1 (fr) 1985-12-27
US4437187A (en) 1984-03-13
BR8205900A (pt) 1983-09-06
ATA434881A (de) 1982-12-15
JPS5872875A (ja) 1983-04-30
AT371921B (de) 1983-08-10

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