EP1756321B1 - Servicing equipment for a blast furnace and device for replacing a blast furnace runner - Google Patents

Servicing equipment for a blast furnace and device for replacing a blast furnace runner Download PDF

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Publication number
EP1756321B1
EP1756321B1 EP05752645A EP05752645A EP1756321B1 EP 1756321 B1 EP1756321 B1 EP 1756321B1 EP 05752645 A EP05752645 A EP 05752645A EP 05752645 A EP05752645 A EP 05752645A EP 1756321 B1 EP1756321 B1 EP 1756321B1
Authority
EP
European Patent Office
Prior art keywords
runner
bridge
inclinable
bridge portion
truck
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 - Fee Related
Application number
EP05752645A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1756321A1 (en
Inventor
Emile Lonardi
Jean-Jacques Willieme
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP1756321A1 publication Critical patent/EP1756321A1/en
Application granted granted Critical
Publication of EP1756321B1 publication Critical patent/EP1756321B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/14—Discharging devices, e.g. for slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging
    • 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
    • F27D3/145—Runners therefor

Definitions

  • the present invention relates to a servicing equipment and handling device for replacing a runner, in particular the main iron runner of a blast furnace.
  • pig iron and pig iron slag are separated in a main runner associated with a taphole of the blast furnace.
  • a main runner is a trough provided with a refractory lining which has to be periodically refurbished.
  • a complete refurbishment of the refractory lining of the main runner generally takes at least one week, during which the corresponding taphole is not productive.
  • the dimensions of the main runner of a modern blast furnace are for example up to 20 m in length, 3 m in width and 2 m in height, and its weight is up to 400 t. It is obvious that the replacement of a main runner with a reserve runner causes serious handling problems.
  • EP 0 279 165 discloses using a lifting device comprising vertical traction elements, which are flexible or rigid and are fixed to the tapping floor or alternatively to the runner, for lifting the main runner vertically between a lower service level and an upper tapping floor level.
  • a lifting device comprising vertical traction elements, which are flexible or rigid and are fixed to the tapping floor or alternatively to the runner, for lifting the main runner vertically between a lower service level and an upper tapping floor level.
  • vertical lifting elements are arranged on the ground floor of the blast furnace plant.
  • An object of the present invention is to propose an improved handling device for replacing a runner, which allows an easy, fast and safe transport of very heavy runners between a lower, service level and an upper, tapping floor level in a cast house.
  • the servicing equipment respectively the handling device, comprises an inclinable bridge capable of supporting the runner in an operational position in front of a taphole of the shaft furnace.
  • This bridge can be inclined so as to form an inclined plane along which the runner can be raised or lowered.
  • the runner can be brought from the upper tapping floor level to the lower service level and vice versa by moving it along an inclined plane. This allows an easy, fast and safe replacement of very heavy runners in a cast house. Sliding the runner along the inclined bridge involves indeed substantially smaller forces than vertically lifting it.
  • a particularly compact and simple handling device comprises a lower bridge portion and an upper bridge portion that can pivot separately and cooperate to form the inclined plane.
  • the lower bridge portion can be brought into a horizontal position allowing, at the lower, service level, the replacement of a runner placed on this lower bridge portion.
  • the upper bridge portion can be brought into a horizontal working position at the upper, tapping floor level, in which a runner placed on this upper bridge portion is operational in front of a taphole of the blast furnace.
  • a runner-supporting truck is for example a rail vehicle, wherein the inclinable bridge includes rails for guiding this rail vehicle.
  • the runner-supporting truck advantageously has wheels that can pivot about a vertical axis.
  • any kind of drive means capable of moving the truck along the inclinable bridge may be used.
  • this drive means comprises a hydraulic jack.
  • the drive means may for example also comprise a winch or a rack-and-pinion system.
  • the inclinable bridge comprises a lower bridge portion and an upper bridge portion that can pivot separately and that cooperate to form the inclined plane
  • the hydraulic jack comprises a jack body incorporated into the lower bridge portion and a telescopic jack piston guided by guiding means, either in the lower bridge portion or in the upper bridge portion.
  • the inclinable bridge is inclined by rotation about at least one approximately horizontal axis, preferably by means of at least one hydraulic jack. It advantageously includes at least one articulated prop used as a support in a non-inclined position and/or in the inclined position.
  • the handling device includes a locking device for fixing the runner to the inclinable bridge.
  • a locking device has two functions. Firstly, it allows to fix the runner, or the runner-supporting truck, in the operational position in front of the taphole. Secondly, it serves to fix the runner, or the runner-supporting truck, to the upper bridge portion of the inclinable bridge when the latter is in its inclined position.
  • the locking device is advantageously conceived so as to unlocked only when the corresponding drive means, for example the hydraulic jack, has taken up the weight of the runner, or of the runner-supporting truck.
  • the locking device comprises an associated safety mechanism, which allows release of said locking device only if the carrier head of the hydraulic piston has engaged the truck in operational position in front of the taphole.
  • Fig. 1 shows a section through a cast house of a blast furnace 10, with a taphole 12 and a main runner 14 associated with this taphole 12.
  • Reference number 16 identifies a tapping floor in the cast house.
  • the main runner 14 is shown at the level of a tapping floor 16, in a tapping position under the taphole 12.
  • Iron runners and slag runners (not shown on the drawings) are arranged downstream and alongside the main runner 14 to divert the iron into iron ladles and the slag into slag pots or slag pits (not shown on the drawings).
  • a handling device in accordance with the present invention is globally identified with reference number 20. It comprises an inclinable bridge 26 consisting of an inclinable first bridge portion 24 and an inclinable second bridge portion 34.
  • the first bridge portion 24 is mounted on the ground floor 44 of the cast house in front of the taphole 12.
  • the inclinable first bridge portion 24 is shown in a horizontal configuration, in which it supports the runner 14 in a tapping position in front of the taphole 12.
  • the inclinable first bridge portion 24 is shown in an inclined runner replacement configuration.
  • the second bridge portion 34 is mounted in a servicing pit 42, below the ground floor 44 of the cast house in axial alignment with the first bridge portion 24.
  • the inclinable second bridge portion 34 is shown in a non-inclined horizontal configuration at the same level than a service floor in a servicing pit 42.
  • the inclinable second bridge portion 34 is shown in an inclined runner replacement configuration in which it cooperates with the inclined first bridge portion 24 to form an inclined plane along which the runner 14 can be raised or lowered.
  • Reference number 22 identifies a runner-supporting truck that supports the main runner 14.
  • This runner-supporting truck 22 is conceived as a rail vehicle guided by rails 40 mounted on both bridge portions 24, 34.
  • a locking device 28 allows to lock the a runner-supporting truck 22 to the front end of the first bridge portion 24.
  • Reference number 32 identifies a second runner-supporting truck carrying a replacement main runner 36. In Fig. 1 this second runner-supporting truck 32 is parked on the service floor, in the servicing pit 42 laterally alongside the lowered second bridge portion 34.
  • the inclinable first bridge portion 24 will now be described in greater detail. It comprises a support track 46 for the runner-supporting truck 22. It will be noted that the support track 46 is substantially longer than the runner-supporting truck 22, whereby it is possible to arrange an extension runner (not shown) downstream of the main runner 14 when the latter is in the tapping position shown in Fig. 1 .
  • Reference number 58 identifies a thermal insulation 58 protecting the lower surface of the support track 46 against heat radiation in this tapping position.
  • the end of the support track 46 that is closest to the taphole 12 rests on an articulated pillar 50.
  • the latter comprises a first bracket 52 fixed to the support track 46 and a second bracket 54 mounted on a base on the cast house floor 44.
  • the two brackets 52, 54 are linked by a substantially horizontal pivot shaft 56 so as to allow the support track 46 to pivot about the substantially horizontal pivot shaft 56.
  • a linear actuator such as a hydraulic jack 62, which is supported with one end in an articulated manner on the floor 44 and connected with its other end in an articulated manner to the support track 46, is used to pivot the support track 46 about the pivot shaft 56; thereby bringing the inclinable first bridge portion 24 either its horizontal tapping configuration or in its inclined runner replacement configuration.
  • the inclinable second bridge portion 34 comprises a support track 46' that cooperates in the replacement configuration of Fig. 2 & 3 with the support track 46 to form a continuous inclined track leading from the taphole 12 into the servicing pit 42.
  • the end of the support track 46' that is farthest away from to the taphole 12 rests on an articulated support 70 in the servicing pit 42, so as to allow the support track 46' to pivot about a substantially horizontal axis.
  • a linear actuator such as a hydraulic jack 72, which is supported with one end in an articulated manner on the floor of the servicing pit 42 and connected with its other end in an articulated manner to the support track 46', is used to pivot the support track 46' about the articulated support 70; thereby bringing the inclinable second bridge portion 34 either its horizontal configuration shown in Fig. 1 or in its inclined runner replacement configuration shown in Fig. 2 or 3 .
  • the second bridge portion 24 is additionally equipped with one or more props 90 that can be moved away. These props 90 support the support track 46' in the inclined position, so that it is possible to unload the second actuator 72 after having raised the support track 46' into its inclined position.
  • Reference number 80 identifies a telescopic jack 80 that is used for driving the runner-supporting truck 22 (or 32) along the inclined plane that is formed by both support tracks 46, 46' when the handling device 20 is in the runner replacement configuration shown in Fig. 2 or 3 .
  • the retracted telescopic jack 80 is arranged inside the support track 46'.
  • the hydraulic jack 62 is preferably a double-action jack in order to be able to counteract the torque exerted by the telescopic jack 80 on the articulated pillar 50.
  • the telescopic jack 80 includes a carrier head 82 which makes loose contact with a bracket 84 beneath the runner-supporting truck 22 so as to support this truck 22 on the inclined plane.
  • the carrier head 82 and the telescopic piston of the jack 80 are equipped with guiding wheels which guide and support the piston and the carrier head 82 within guiding rails in of the support tracks 46, 46'.
  • Fig. 3 shows the situation after completion of the downward travel of the truck 22 on the inclined bridge 26. This situation is reached when the telescopic jack 80 is fully retracted. The truck 22 is then entirely supported on the lower bridge portion 34. When the props 90 are moved away, the second actuator 72 can pivot the lower bridge portion 34 into its horizontal position. The first truck 22 supporting the worn runner 14 can then be replaced with the second truck 32 supporting the refurbished runner 36. This operation is performed on the service floor in the pit 42.
  • Fig. 4 shows the plan of the rails in the pit 42.
  • Two horizontal areas 100 and 102, for parking and for refurbishment, are provided laterally on either side of the lower bridge portion 34.
  • Transverse rails 106 are placed transversally to the rails 40 of the portion 34, thereby allowing both the first truck 22 to be easily removed from the portion 34 and the second truck 32 to be easily placed thereon.
  • the reference numerals 108 identify winches intended for this lateral traction movement of the trucks.
  • Lateral stops 110 are placed on some of the transverse rails 106 so as to limit the lateral travel of the trucks 22 resp. 32.
  • End-of-travel stops 114 are placed in the extension of the rails 40 in the descending direction so as to limit the descending travel of the truck 22 resp. 32.
  • Fig. 4 also shows vertical jacks 112 arranged along the lower bridge portion 34 for lifting the truck 22 (resp. 32) from the rails 40 as described in the following paragraph.
  • Fig. 5 shows, in a cross section, the trucks 22 and 32 in the pit 42.
  • the trucks 22, 32 are in the pit 42 during the exchange procedure.
  • running wheels 120 on which the trucks 22 and 32 can run, are each mounted on a bracket 122, which can rotate about a vertical axis.
  • the truck 22 resp. 32 is raised by the vertical jacks 112.
  • the truck 22 resp. 32 is raised, its running wheels 120 can be rotated through 90°, thereby making it possible to choose between the longitudinal or lateral movement.
  • Fig. 5 also shows that the runners 14, 36 are mounted in the trucks 22, resp. 32, with a circumferential gap 124.
  • the runners 14 resp. 36 are mounted on sliding plates or running rods (not shown) inside the trucks 22 resp. 32 and are fixed to the latter only at one particular point (not shown) along their length. This type of mounting allows thermal expansion of the runner 14 resp. 36 during operation in front of the taphole 12.
  • Fig. 5 also shows in sectional view the construction of the lower bridge portion 34.
  • the lower bridge portion 34 comprises two longitudinal parallel girders 130, for example two steel beams.
  • the girders 130 are joined together along their length by a plurality of upper 132 and lower 134 cross members, welded to the inner walls 136 of the girders 130.
  • a space is provided between the girders 130 and the upper 132 and lower 134 cross members for the extension of the telescopic jack 80.
  • the support wheels 92 for the jack 80 are guided and supported in sections 138 fixed to the inside of the portions 24, 34.
  • the rails 40 are welded to the girders 130 immediately above their outer walls 140 for stability reasons.
  • the upper bridge portion 24 has a similar construction. It will be understood that such a construction makes it possible to obtain an inclined bridge 26 that is strong, reliable and compact.
  • the locking device 28 provides an important function. In fact, it ensures both that the main runner 14 is secured in front of the taphole 12 in the operational position and that, in the runner replacement configuration of the inclined bridge 26, the runner-supporting truck 22 remains unable to move on the upper bridge portion 24, which is then inclined.
  • Fig. 6 shows a vertical section of a preferred embodiment of the locking device 28, which more precisely comprises a locking piston 200 that slides in a guide 202 with reinforced walls 204.
  • the locking piston 200 In the locked position, as shown in Fig. 6 , the locking piston 200 is engaged with a hollow clamping ring 206 provided on a lowered member 208 of the runner-supporting truck 22, resp. 32.
  • the mechanism for the handling device 28 is housed in a box 210, which is firmly attached to the upper bridge portion 24, preferably near the taphole 12.
  • This mechanism comprises a hydraulic actuating jack 212 used to withdraw or alternatively introduce the locking piston 200 relative to the clamping ring 206.
  • the actuating jack 212 is mounted on a support arm 214 in the box 210.
  • Fig. 7 shows the locking device 28 of Fig. 6 in a horizontal section along the line C-C in Fig. 6 .
  • the handling device 28 comprises an additional internal safety mechanism 216. More precisely, this mechanism 216 comprises a safety yoke 218 that can pivot on a hinge 220. The safety yoke engages in a groove 222 of the locking piston 200 in order to secure it, that is to say to ensure that unintentional withdrawal of the locking piston 200 out of the clamping ring 206 cannot occur.
  • a lever 224 normally holds the safety yoke 218 in position engaged in the groove 222, with elastic pre-stress provided by a spring 226.
  • the safety yoke is disengaged by a cam 228 that acts on a pusher 230 provided on the safety yoke 218 on the side facing the portion 24.
  • This cam 228 is placed on the carrier head 82 of the telescopic jack 80.
  • two devices 28 are placed symmetrically on either side of the upper bridge portion 24 (with their accessories on the truck 22, 32, the portion 24 and the carrier head 82).
  • the locking piston 200 can release the truck 22, resp. 32, only when the carrier head 82 is present, that is to say when the telescopic jack 80 is able to support the truck 22, resp. 32.
  • end-of-travel switches are provided as an additional safety measure, preferably for all the moving elements or motors of the handling device for replacing a runner 20. These elements are in particular, the bridge portions 24 and 34, the carrier head 82, the locking device 28, the props 64 and 90, the vertical jacks 112, the winches 108 and the actuators 62, 72.
  • end-of-travel switches are preferably provided for each of its members, which incidentally allow its rate of retraction/extension to be uniformly controlled.
EP05752645A 2004-06-04 2005-06-03 Servicing equipment for a blast furnace and device for replacing a blast furnace runner Expired - Fee Related EP1756321B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU91082A LU91082B1 (fr) 2004-06-04 2004-06-04 Dispositif pour remplacer la rigole principale d'un haut fourneau.
PCT/EP2005/052567 WO2005118888A1 (en) 2004-06-04 2005-06-03 Handling device for replacing a runner

Publications (2)

Publication Number Publication Date
EP1756321A1 EP1756321A1 (en) 2007-02-28
EP1756321B1 true EP1756321B1 (en) 2012-01-25

Family

ID=34955593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05752645A Expired - Fee Related EP1756321B1 (en) 2004-06-04 2005-06-03 Servicing equipment for a blast furnace and device for replacing a blast furnace runner

Country Status (10)

Country Link
EP (1) EP1756321B1 (ko)
KR (1) KR101147875B1 (ko)
CN (1) CN1965094B (ko)
AT (1) ATE542923T1 (ko)
BR (1) BRPI0511606A (ko)
LU (1) LU91082B1 (ko)
RU (1) RU2368664C2 (ko)
TW (1) TWI293984B (ko)
UA (1) UA83309C2 (ko)
WO (1) WO2005118888A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105420434B (zh) * 2015-11-17 2018-04-10 南京联合荣大工程材料有限责任公司 一种更换式高炉出铁沟
KR20220032217A (ko) 2020-09-07 2022-03-15 임상일 강아지 다이어리

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407445C3 (de) * 1974-02-16 1980-10-23 Karl Mengele & Soehne Maschinenfabrik Und Eisengiesserei Gmbh & Co, 8870 Guenzburg Hub- und Kippgerät
DE3412167A1 (de) * 1984-03-31 1985-10-10 Fritz 4274 Lembeck Schmidt Vorrichtung zum heben und kippen einer ladeflaeche
DE3624266A1 (de) * 1986-07-18 1988-01-21 Gutehoffnungshuette Man Vorrichtung zum auswechseln von hauptabstichrinnen an hochoefen
DE3705099A1 (de) * 1987-02-18 1988-09-01 Gutehoffnungshuette Man Vorrichtung zum auswechseln von abstichrinnen an schachtoefen
CA2042203C (en) * 1990-07-24 1996-02-13 Hiroaki Kondo Scroll type fluid machinery
JP3938600B2 (ja) * 1995-04-12 2007-06-27 新日本製鐵株式会社 高炉用大樋
JP2004076033A (ja) * 2002-08-12 2004-03-11 Nippon Steel Corp 高炉傾注樋の取り替え方法および装置

Also Published As

Publication number Publication date
RU2006146627A (ru) 2008-07-20
LU91082B1 (fr) 2005-12-05
TWI293984B (en) 2008-03-01
KR20070030204A (ko) 2007-03-15
KR101147875B1 (ko) 2012-06-01
RU2368664C2 (ru) 2009-09-27
CN1965094B (zh) 2013-04-17
CN1965094A (zh) 2007-05-16
WO2005118888A1 (en) 2005-12-15
ATE542923T1 (de) 2012-02-15
TW200540277A (en) 2005-12-16
EP1756321A1 (en) 2007-02-28
BRPI0511606A (pt) 2008-01-02
UA83309C2 (ru) 2008-06-25

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