WO2011063426A1 - Ensemble de pince d'électrode de four à arc - Google Patents

Ensemble de pince d'électrode de four à arc Download PDF

Info

Publication number
WO2011063426A1
WO2011063426A1 PCT/ZA2009/000100 ZA2009000100W WO2011063426A1 WO 2011063426 A1 WO2011063426 A1 WO 2011063426A1 ZA 2009000100 W ZA2009000100 W ZA 2009000100W WO 2011063426 A1 WO2011063426 A1 WO 2011063426A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamp
connection points
assembly
pair
segment
Prior art date
Application number
PCT/ZA2009/000100
Other languages
English (en)
Inventor
Malcolm Christian Theron
Riander Faurie Botha
Original Assignee
Allied Furnace Consultants (Pty) Limited
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 Allied Furnace Consultants (Pty) Limited filed Critical Allied Furnace Consultants (Pty) Limited
Priority to PCT/ZA2009/000100 priority Critical patent/WO2011063426A1/fr
Publication of WO2011063426A1 publication Critical patent/WO2011063426A1/fr
Priority to ZA2012/03520A priority patent/ZA201203520B/en

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; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; 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
    • 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
    • F27D11/10—Disposition of electrodes

Definitions

  • This invention relates to an assembly for an arc furnace electrode clamp.
  • Arc furnaces are used in the melting and smelting industry.
  • certain parameters are continuously monitored. Accordingly, the height of the electrode above the slag and molten metal is continually adjusted to provide an optimum arc and power input.
  • the energy of an electrical arc between a vertically orientated electrode and the ore, reductant and flux and/ or metal smelts and/ or melts the ore, reductant and flux and/ or metal inside the furnace to form molten slag and molten metal.
  • certain parameters are continuously monitored. Accordingly, the height of the electrode above the slag and molten metal is continually adjusted to provide an optimum arc and power input.
  • the electrode column includes an upper electrode clamp and a lower electrode clamp.
  • the upper clamp is fixed in position and is connected to the lower clamp with a hydraulic push-pull arrangement, to move the lower clamp relative to the fixed upper clamp.
  • the bottom clamp is in the closed position clamping the electrode and the upper clamp is in the open position.
  • the height of the electrode above the slag and molten metal is controlled by means of the hydraulic push-pull arrangement in
  • a slipping cycle means lowering relative to the lower clamp.
  • a slipping cycle includes the steps of first closing the upper clamp to clamp the electrode in a fixed position and then by
  • the electrode must not be allowed to slip into the furnace through the bottom clamp during operation of the furnace. It will also be appreciated that it is a costly to shut the furnace down and that it will be an advantage not to shut the furnace down when a part of the upper or lower clamp needs to be replaced. It will further be appreciated that the bulk of the slipping device should be limited. It will also be appreciated that the slipping device should preferably be able to be scaled up for large electrode diameters of more than .55 meters for large furnace plants.
  • the inventor is aware of electro mechanically controlled clamps. These clamps are complex and need after installation lubrication and
  • This clamp includes a single unit comprising a single spring and single hydraulic cylinder in axial alignment.
  • the inventor is also aware of a slipping device with an electrode clamp, which clamp includes two semi circular clamp segments hingedly connectable along opposed edges to define closable tubular jaws of a clamp. This arrangement is well known in the art.
  • This clamp further includes a lever arrangement for opening and closing the jaws, which lever arrangement includes opposed connection points arranged along the length of the tubular jaws for connecting to non aligned opening means and closing means. This solves the problem of maintenance without shut down of the furnace since the opening means and closing means is separated and separately maintainable.
  • an assembly for an arc furnace electrode clamp which assembly includes:
  • an opening and closing arrangement for opening and closing the jaws, which arrangement includes a pair of opposed connection points arranged outside and along the length of the tubular jaws for connecting to a pair of pivotably connected members, which pivotably connected members are configured to be pivoted relative to each other by means of a wedge.
  • the term, length, of the clamp segments will be understood to be parallel to the axis of the tubular jaws.
  • the assembly may include a third semi circular clamp segment to be fitted between the free ends of the two semi circular clamp segments and the segment may also include a pair of opposed connection points arranged outside along the length of the segment for connecting, respectively, to the pair of pivotably connected members.
  • connection points will be understood to be a point in plan view and may be series of connection points in a line along the length of the segment, in side view.
  • connection points of one jaw member may correspond to one of the series of connection points on the third clamp segment while the series of connection points of the other jaw member may correspond to the other series of connection points on the third clamp segment, closest to each other, in each case.
  • the connection points of the jaw members and the third clamp segments are connected to the ends of the pivotably connected members by means of connection rods or linking members.
  • the lengths, configuration and connection points of the connection rods are selected such that, when the free ends of the pair of pivotably connected members are wedged apart from each other, the three clamp segments move in concert towards the axis of the tubular jaws, to apply a uniform clamping force, in use.
  • the clamp assembly in accordance with the invention can be used in open and submerged furnaces. It can also be used in AC and DC furnaces, preferably AC furnaces.
  • the clamps may also be used for any ferro alloy or chromium furnace.
  • the clamp may further be used for pre-baked electrodes such as graphite electrodes or preferably for Soderberg electrodes.
  • the invention also extends to an electrode column and furnace fitted with an electrode clamp in accordance with the invention.
  • clamp assembly in accordance with the invention is compact and allows it to be used in slipping devices for electrodes in excess of 1.55 meters.
  • the invention can also be.
  • the wedge like opening and closing means minimises moving parts and increases reliability, and is maintainable with minimum down time and costs.
  • Figure 1 shows diagrammatically a plan view of a clamp assembly for an electrode column, in accordance with the invention
  • Figure 2 shows diagrammatically an end view of the opening and closing arrangement for opening and closing the jaws, in a clamping state; and
  • Figure 3 shows diagrammatically an end view of the opening and closing arrangement for opening and closing the jaws, in a release state.
  • An arc furnace electrode clamp assembly 10 includes two semi circular clamp segments 12 hingedly connectable along opposed edges 13 to define closable tubular jaws 14 of a clamp.
  • the assembly 10 also includes a third semi circular clamp segment 16 to be fitted between the free ends of the two semi circular clamp segments 12.
  • the assembly 0 further includes an opening and closing arrangement 18 for opening and closing the jaws of the segments 12, which arrangement includes a pair of opposed connection points 20 arranged outside and along the length of the tubular jaws for connecting to a pair of pivotably connected members 22, which pivotably connected members are configured to be pivoted relative to each other by means of a wedge 24 shown in figures 2 and 3.
  • the third semi circular clamp segment 16 also includes a pair of opposed connection points 26 arranged outside along the length of the segment 16 for connecting, respectively, to the pair of pivotably connected members 22.
  • One series of connection points of one jaw member, 20.1 or 20.2 corresponds to one of the series of connection points, 26.1 or 26.2, respectively, on the third clamp segment 16.
  • connection points 20 of the jaw members 12 and the third clamp segments are connected to the ends of the pivotably connected members 22 by means of a pair of sets of connection rods or linking members 28.1 and 28.2.
  • the lengths, configuration and connection points of the connection rods 28 are selected such that, when the free ends 22.2 of the pair of pivotably connected members 22 are wedged apart from each other, the three clamp segments 12 and 16 move in concert towards the axis 30 of the tubular jaws, to apply a uniform clamping force, in use.
  • a set of coils springs urges the wedge shaped free ends 24 of the pair of pivotably connected members 22 into a closed , clamping state and a pair of hydraulically operable wedge shaped opening wedge members 34 can operably force the free ends 24 into an open, non clamping states.
  • Figure 2 shows the forces by means of the arrows of the clamping state and
  • Figure 3 shows the forces by means of the arrows of the non clamping state.

Landscapes

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

Abstract

L'invention porte sur un ensemble de pince d'électrode de four à arc (10). L'ensemble comprend deux segments de pince semi-circulaires (12) pouvant être reliés de façon articulée le long de bords opposés de façon à définir des mâchoires tubulaires pouvant être fermées (14) d'une pince. L'ensemble comprend de plus un agencement d'ouverture et de fermeture (18) pour ouvrir et fermer des mâchoires (14), lequel agencement comprend une paire de points de liaison opposés (20) disposés à l'extérieur et le long de la longueur des mâchoires tubulaires (14) pour la liaison à une paire d'éléments reliés de façon pivotante (22), lesquels éléments reliés de façon pivotante (22) sont configurés de façon à pivoter l'un par rapport à l'autre sous l'actionnement d'un coin (24).
PCT/ZA2009/000100 2009-11-17 2009-11-17 Ensemble de pince d'électrode de four à arc WO2011063426A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/ZA2009/000100 WO2011063426A1 (fr) 2009-11-17 2009-11-17 Ensemble de pince d'électrode de four à arc
ZA2012/03520A ZA201203520B (en) 2009-11-17 2012-05-15 An arc furnace electrode clamp assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ZA2009/000100 WO2011063426A1 (fr) 2009-11-17 2009-11-17 Ensemble de pince d'électrode de four à arc

Publications (1)

Publication Number Publication Date
WO2011063426A1 true WO2011063426A1 (fr) 2011-05-26

Family

ID=44060091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2009/000100 WO2011063426A1 (fr) 2009-11-17 2009-11-17 Ensemble de pince d'électrode de four à arc

Country Status (2)

Country Link
WO (1) WO2011063426A1 (fr)
ZA (1) ZA201203520B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014001991A3 (fr) * 2012-06-28 2014-07-03 Jacques Venter Dispositif de serrage d'électrode
CN111560528A (zh) * 2020-05-22 2020-08-21 铜陵有色金属集团股份有限公司 顶吹炉的开炉方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578893A (en) * 1967-11-20 1971-05-18 Boehler & Co Ag Geb Electrical component clamping device in an electromelting installation for metals
JPH11297466A (ja) * 1998-04-10 1999-10-29 Tenma Denki Sangyo:Kk 電極継足装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578893A (en) * 1967-11-20 1971-05-18 Boehler & Co Ag Geb Electrical component clamping device in an electromelting installation for metals
JPH11297466A (ja) * 1998-04-10 1999-10-29 Tenma Denki Sangyo:Kk 電極継足装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014001991A3 (fr) * 2012-06-28 2014-07-03 Jacques Venter Dispositif de serrage d'électrode
CN104520662A (zh) * 2012-06-28 2015-04-15 雅克·文特尔 电极夹持装置
US9775198B2 (en) 2012-06-28 2017-09-26 Jacques Venter Electrode clamping device
RU2639900C2 (ru) * 2012-06-28 2017-12-25 Жак ВАНТЕ Зажимное устройство для электрода
CN111560528A (zh) * 2020-05-22 2020-08-21 铜陵有色金属集团股份有限公司 顶吹炉的开炉方法

Also Published As

Publication number Publication date
ZA201203520B (en) 2013-06-26

Similar Documents

Publication Publication Date Title
JP5808669B2 (ja) 電極をロックする点を調整するデバイス
CN201355749Y (zh) 用于配电线路的带双沟线夹的绝缘杆
CN105671331B (zh) 同轴导电大型板坯电渣炉
WO2011063426A1 (fr) Ensemble de pince d'électrode de four à arc
CN202296818U (zh) 一种自动电极夹钳
RU2503525C2 (ru) Машина для контактной стыковой сварки рельсов
ZA200904937B (en) An arc furnace electrode clamp assembly
CN103173630A (zh) 电渣重熔炉
CN102703724B (zh) 电渣炉大电流同轴滑动导电集电装置
CN105648229A (zh) 节能型多同轴大电流导电短网
CN211012397U (zh) 电弧炉及能夹紧电极的炉盖
CN205676522U (zh) 电渣炉强力电极夹持器
EP2928267B1 (fr) Corps de bras de support d'electrode avec corps de bras de support
CN203143925U (zh) 一种改进的lf钢包精炼炉电极事故夹钳
CN211373204U (zh) 一种干式自动倾倒熔炼炉
CN202511615U (zh) 一种电弧熔炼炉的伸缩升降炉盖
CN202358831U (zh) 坩埚用夹具
CN202089681U (zh) 石墨坩埚夹
CN201942428U (zh) 一种圆锭钢专用夹具
CN105241243A (zh) 一种底注式中频保温炉的浇注塞杆机构
CN217051273U (zh) 一种炼钢炉电极掉落钢包后打捞装置
US3538295A (en) Plant for resistance butt-welding of pipes
CN210242442U (zh) 一种电熔炉冶炼升降装置
CN210334355U (zh) 钨或钼管装粉工装
CN212350746U (zh) 一种新型多功能电焊机

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09851547

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09851547

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 09851547

Country of ref document: EP

Kind code of ref document: A1