EP1865078A1 - Procede de portage de soubassement pour haut-fourneau - Google Patents

Procede de portage de soubassement pour haut-fourneau Download PDF

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Publication number
EP1865078A1
EP1865078A1 EP06730932A EP06730932A EP1865078A1 EP 1865078 A1 EP1865078 A1 EP 1865078A1 EP 06730932 A EP06730932 A EP 06730932A EP 06730932 A EP06730932 A EP 06730932A EP 1865078 A1 EP1865078 A1 EP 1865078A1
Authority
EP
European Patent Office
Prior art keywords
furnace
furnace bottom
blast furnace
mantel
bricks
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
EP06730932A
Other languages
German (de)
English (en)
Other versions
EP1865078B1 (fr
EP1865078A4 (fr
Inventor
Hiroshi c/o NIPPON STEEL TAKASAKI
Kazumi c/o NIPPON STEEL KURAYOSHI
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.)
Nippon Steel Engineering Co Ltd
Original Assignee
Nippon Steel Engineering Co Ltd
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 Nippon Steel Engineering Co Ltd filed Critical Nippon Steel Engineering Co Ltd
Publication of EP1865078A1 publication Critical patent/EP1865078A1/fr
Publication of EP1865078A4 publication Critical patent/EP1865078A4/fr
Application granted granted Critical
Publication of EP1865078B1 publication Critical patent/EP1865078B1/fr
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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/04—Blast furnaces with special refractories
    • C21B7/06—Linings for furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/02—Internal forms
    • 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
    • F27B1/12—Shells or casings; Supports therefor
    • F27B1/14—Arrangements of linings
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1694—Breaking away the lining or removing parts thereof
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers

Definitions

  • the present invention relates to a conveyance method comprising constructing a blast furnace body in advance at a location other than the blast furnace foundation, disassembling the existing furnace body, then conveying the blast furnace on to that foundation, particularly a method of conveying a furnace bottom mantle for a blast furnace which conveys a furnace bottom mantle for a blast furnace, in which bricks have been installed in advance, to the blast furnace foundation.
  • Japanese Patent Publication (B2) No. 47-1846 discloses the technology of dividing a blast furnace into a furnace bottom, bosh, furnace belly, furnace shaft, furnace opening, and the like, successively moving them in the lateral direction and stacking the divided parts using a mobile scaffold for each part around the blast furnace, connecting the entire assembly to form an integral unit, and thereby shortening the construction period of the blast furnace.
  • Japanese Patent Publication (A) No. 9-143521 discloses a method of repairing and constructing a blast furnace in a short period comprised of the steps of, in the disassembly or rebuilding an existing blast furnace, (a) dividing a furnace body into several ring-shaped blocks from the furnace top to the furnace bottom and constructing them at a location other than the blast furnace foundation, (b) attaching means for preventing warping or strain of the brick stacking part and means for securing circularity to the blocks other than the bottommost furnace bottom block in the ring-shaped blocks, (c) on the other hand, stacking bricks on a furnace bottom plate set at the bottom end to construct the furnace bottom block, (d) conveying the ring-shaped blocks other than the furnace bottom block on to the blast furnace foundation by lateral conveyance, then successively lifting up and joining the blocks from the furnace top using the liftup method, and (e) conveying and installing the furnace bottom block on the foundation by lateral conveyance at the level of the blast furnace foundation level, then joining it
  • Japanese Patent Publication (A) No. 10-102778 discloses a method of construction of a blast furnace body dividing an existing furnace body of a blast furnace into a plurality of ring blocks from the furnace top to the furnace bottom and dismantling it and fabricating similar ring blocks and assembling the ring blocks on the blast furnace foundation, which method of construction of a blast furnace body comprises installing a hoist apparatus for raising or lowering a ring block of the furnace body at a location other than the blast furnace foundation, transferring the ring block to transport carts carrying a load level adjustment structure so as to match the load level with the blast furnace foundation level, transporting the block to the hoist apparatus, supporting the ring block by the hoist apparatus, then removing the load level adjustment structure, lowering the ring block to the lowest level which the transport cart can carry and transporting it to a placement site by the transport carts, on the other hand constructing the ring block at the lowest level which the transport cart can carry, transporting it to the hoist apparatus by the transport carts, supporting the ring
  • the method described in Japanese Patent Publication (B2) No. 47-1846 is a method comprising constructing each divided block on a scaffold of the same height as the assembled finished height, moving each part using the mobile scaffold after completion, and thereby completing the furnace body.
  • the furnace body is divided and assembled on the scaffold for each divided height, and the blocks are constructed on the scaffold.
  • the ring-shaped blocks of a furnace body are moved over the blast furnace foundation, lifted up, and joined. Finally, the furnace bottom block is moved and the rings are placed over and joined with the furnace bottom block to complete the furnace body. At this time, the furnace bottom block is built up by stacking bricks on the furnace bottom plate.
  • the furnace bottom of a blast furnace has a diameter of as much as 10 to 20 meters.
  • the deformation of the furnace bottom plate is the most important problem, but the above publication does not disclose this important problem and means for its solution. Therefore, while there was the idea of stacking bricks at a furnace bottom block, specifically how to solve the above problem is still a pending issue among the concerned parties. This method has not yet been realized in practice.
  • Japanese Patent Publication (A) No. 10-102778 discloses installing a hoist apparatus which raises and lowers a ring block of a furnace body at a location other than the blast furnace foundation and moving the ring block to the blast furnace foundation by transport carts carrying a load level adjustment structure so as to match the load level to the blast furnace foundation level, but does not disclose the advance installation of bricks to the blocks of the furnace body.
  • the present invention was completed as a result of intensive studies by the present inventors to solve the above problems and has as its gist the following.
  • a blast furnace is disassembled and repaired by cutting a furnace body 2 of the blast furnace in the horizontal direction to separate it into a plurality of sections in the vertical direction and removing them from the blast furnace foundation 5 to outside the blast furnace foundation.
  • the furnace body 2 to be newly installed is constructed by a number of blocks set in advance at a location than the blast furnace foundation (ground assembly site).
  • FIG. 2 is a view showing the state when conveying the furnace bottom mantel 1 divided into blocks and constructed at the ground assembly site.
  • balance beams 16 are set at the ground surface.
  • laying beams 12 are placed.
  • air casters 18 Between the laying beams 12 and the balance beams 16 are installed air casters 18 for making the laying beams float up.
  • the furnace bottom mantel 1 is constructed on the top surfaces of the laying beams 12 configured in this way.
  • FIG. 4 and FIG. 12 show one example of the layout of the air casters 18, but the method of arrangement of the air casters 18 is not limited to this.
  • the shell 7 is placed standing on the furnace bottom plate 6, the stave cooler 8 is laid on the inside of the shell 7, and the hearth bricks 9 are installed via the joint filling material 11 on the top surface of the furnace bottom plate 6. Then, carbon bricks 10 are installed on the top surface of the hearth bricks 9 via a joint filling material.
  • the weight of the furnace bottom mantel 1 becomes approximately 1000 tons or more.
  • the present inventors engaged in repeated numerical analyses and experiments by the finite element method and as a result obtained the discovery that if conveying the furnace bottom mantel 1 while keeping the flexure amount per meter of the mantel radius down to 3 mm at the top surface of the carbon bricks 10 installed on the furnace bottom mantel 1, it is possible to place it on the blast furnace foundation and use it as it is.
  • FIG. 2 is a view showing the mode of conveying a furnace body carrying a furnace bottom mantel on laying beams of the former case.
  • the furnace bottom mantel and the laying beams are set on the blast furnace foundation. For this reason, it is necessary to give rigidity to the laying beams 12.
  • the structure of the laying beams 12 is shown in FIG. 4(a) and FIG. 4(b).
  • the laying beams 12 are comprised of H section steel assembled in rack or lattice state and filled with fire-retardant concrete 15 and has a high rigidity.
  • the flexure amount of the laying beams configured in this way is shown in FIG. 5.
  • the thickness H of the laying beams is not 480 mm or more, the flexure amount found by experiments ends up exceeding 3 mm/m. It was learned that the thickness H of the laying beams has to be 480 mm or more. Further, if the thickness H of the laying beams is over 1000 mm, only the weight increases. This is not economical.
  • the laying beams are placed on balance beams. Therefore, the balance beams 16 support the furnace bottom mantel 1 and laying beams 12 and require rigidity for keeping the flexure of the top surface of the carbon bricks in the furnace bottom mantel down to 3 mm/m or less.
  • the thickness A of the balance beams has to be 700 mm or more. If 700 mm or more, the flexure of the top surface of the carbon bricks can be suppressed to 3 mm/m or less, but there is a limit to the strength of the dollies for conveying the furnace bottom mantel including the balance beams and the laying beams. The height A of the balance beams therefore become 2200 mm or less.
  • large scale heavy weight transport carts that is, dollies 17, are used. That is, the dollies 17 are connected in the conveyance direction (longitudinal direction) to form a plurality of dolly trains, the formed plurality of dolly trains are pulled in to the inside of the clearance formed between the balance beams 16 and the ground level in parallel, and the hydraulic pressure of the dollies is operated to raise the balance beams 16 and convey the mantel to the side of the blast furnace foundation.
  • FIG. 8(a) shows the furnace bottom mantel at which bricks have been installed at the ground assembly site
  • FIG. 8(b) shows the furnace bottom mantel being conveyed by the dollies
  • FIG. 8(c) shows the furnace bottom mantel being conveyed using air casters.
  • the lengths of the dolly trains arranged in parallel are reduced from the center train to the end trains as shown in FIG. 9(a).
  • the furnace bottom mantel 1 is cylindrical in shape, so by reducing the lengths of the dolly trains from the center to the ends, it is possible to absorb the loads applied to the dollies with a good balance.
  • the layout of the dolly trains, by making the distance between the dollies within 2.5 m, the distance P between the cylinders arranged at the dollies becomes 2.5 m or less and the distance supporting the balance beams 16 becomes 2.5 m or less.
  • the support points of the balance beams 2.5 m or less the flexure amount of the balance beams can be kept down to a minimum and parts sticking out from the outer circumference of the furnace bottom mantel can be kept to a minimum.
  • the balance beams 16 are preferably shaped in accordance with the lengths of the dolly train. By shaping them in this way, it becomes possible to evenly disperse the loads applied to the dollies and in turn reduce the flexure amount at the amount of conveyance.
  • FIG. 10(a) and FIG. 10(b) are views showing an outline of a reinforcing ring 19.
  • the reinforcing ring 19 is arranged at the upper outer circumference of the furnace bottom mantel 1. If the part where the bricks were installed in advance in the furnace bottom mantel are the hearth bricks 9 and carbon bricks 10, since there is the shell part of the furnace bottom mantel, deformation of the furnace bottom mantel shell by the flexure of this part (collapse to the inside) is prevented.
  • FIG. 11(a) and FIG. 11(b) are views showing an outline of the stays 21 set at the inner surface of the furnace bottom mantel.
  • the stays 21 are arranged radially.
  • the stays 21 are arranged in the vicinity of the top surface of the carbon bricks installed in the furnace bottom mantel. This is because as close as possible to the top surface of the carbon bricks 10 is better so as to prevent flexure of the top surface of the carbon bricks as much as possible.
  • the present invention is an invention completed based on the novel and useful technical discovery never existing in the prior art that even with a furnace bottom mantel 1 increased in weight by installation of bricks in advance at a location other than the foundation of the blast furnace, if conveying the mantle while keeping the flexure amount of the top surface of the bricks installed inside the furnace down to 3 mm per meter of the mantel radius or less, it is possible to stably convey the mantel to the blast furnace foundation without causing joint breakage of the bricks or the like.
  • a laser transmitter 26 and a plurality of laser receivers 27 receiving a laser beam 28 emitted from the laser transmitter 26 at the top surface of the bricks installed in the furnace bottom mantel 1.
  • a laser or other transmitter is set at a fixed point
  • an immovable reference point is set at one location of a fixed point
  • the vertical direction displacements at the measurement points are found by relative comparison with the reference point.
  • the measured object is positioned inside the part surrounded by the shell 7. It is difficult to observe the measurement points from an outside fixed point.
  • the measured object also moves several tens to several hundreds of meters, so placing the transmitter at a fixed point can be said to be impossible from the point of view of the receiving abilities of the receivers.
  • the laser transmitter 26 it is preferable to set the laser transmitter 26 at any position on the top surface of the bricks installed in the furnace bottom mantel 1 and similarly set a plurality of laser receivers 27 at any positions on the top surface of the bricks.
  • a plurality of laser receivers 27 on a straight line.
  • the vertical direction displacement on the straight line that is, the flexure amount of the top surface of the bricks, can be accurately measured.
  • the laser transmitter 26 is not particularly limited.
  • the rotary laser shown in FIG. 13(a) can be used. By using a rotary laser, the constantly changing vertical direction displacement can be instantaneously detected.
  • the laser receivers 27 are not particularly limited. Displacement measuring devices for rotary lasers can be used.
  • a wireless or wired communicating means to transmit laser reception position data in the laser receivers 27 to a worker outside the furnace.
  • a wireless or wired communicating means to connect the laser receivers 27 and a computer set outside the furnace, it is possible to confirm at any time the constantly changing vertical direction displacements, that is, the flexure amounts, at the laser receivers due to the mantel conveyance.
  • the vertical direction displacement can be detected by the laser receivers themselves when using laser receivers 27 able to store the laser reception positions before the mantel conveyance and able to calculate the difference with the constantly changing laser reception position.
  • the difference can also be calculated by a computer connected by a wireless or wired communicating means.
  • the laser transmitter 26 and the laser receivers 27 are set on the top surface of the bricks installed in the furnace bottom mantel, so, as shown in FIG. 14, if flexure occurs at the top surface of the bricks, a slant occurs at the laser transmitter 26.
  • the laser reception position at each laser receiver 27 and in turn the vertical direction displacement detected include error.
  • the error becomes larger proportional to the distance between the laser transmitter 26 and the laser receivers 27.
  • FIG. 15(a) and FIG. 15(b) are views showing another mode of the layout of the laser transmitter 26 and the laser receivers 27. By arranging them in this way, it is possible to make corrections to cancel out the error caused by the slant of the laser transmitter 26 caused by flexure of the top surface of the bricks.
  • This method arranges a plurality of laser receivers 27 on the same straight line, uses the detected vertical direction displacements to make corrections to cancel out the error caused by the slant of the laser transmitter 26 caused by flexure of the top surface of the bricks, and make the vertical direction displacements after correction the true flexure amount.
  • the endmost laser receiver A arranged on the line is constantly made the reference 0. Further, the value of the laser receiver B arranged at the endmost part at the opposite side is read. The values of the receivers set between these are corrected by the set distance L.
  • the furnace bottom mantel can be stably conveyed on to the blast furnace foundation. Therefore, the present invention is high in applicability in the ferrous metal industry.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP06730932A 2005-03-29 2006-03-27 Procede de portage d'un soubassement pour un haut-fourneau Expired - Fee Related EP1865078B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005094898 2005-03-29
JP2005363618A JP4822831B2 (ja) 2005-03-29 2005-12-16 高炉用炉底マンテルの搬送方法
PCT/JP2006/306984 WO2006104229A1 (fr) 2005-03-29 2006-03-27 Procede de portage de soubassement pour haut-fourneau

Publications (3)

Publication Number Publication Date
EP1865078A1 true EP1865078A1 (fr) 2007-12-12
EP1865078A4 EP1865078A4 (fr) 2009-10-21
EP1865078B1 EP1865078B1 (fr) 2012-01-11

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ID=37053483

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Application Number Title Priority Date Filing Date
EP06730932A Expired - Fee Related EP1865078B1 (fr) 2005-03-29 2006-03-27 Procede de portage d'un soubassement pour un haut-fourneau

Country Status (7)

Country Link
EP (1) EP1865078B1 (fr)
JP (1) JP4822831B2 (fr)
KR (1) KR100949854B1 (fr)
CN (1) CN101155934B (fr)
BR (1) BRPI0609604B1 (fr)
TW (1) TWI325014B (fr)
WO (1) WO2006104229A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4351290B2 (ja) * 2007-10-26 2009-10-28 新日鉄エンジニアリング株式会社 高炉の炉底構造
JP5307422B2 (ja) * 2008-03-05 2013-10-02 新日鉄住金エンジニアリング株式会社 鉄皮補強部材の取付構造
CN102896456B (zh) * 2011-07-26 2014-07-16 上海宝钢工业技术服务有限公司 混铁车炉壳下挠变形矫正修理方法
US20190011185A1 (en) * 2015-12-30 2019-01-10 Danieli Corus B.V. Shaft furance construction method and assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041162A1 (fr) * 1999-03-31 2000-10-04 Kawasaki Steel Corporation Procédé de construction d'un haut fourneau et dispositif de levage transférable

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05222420A (ja) * 1991-02-27 1993-08-31 Kawasaki Steel Corp 高炉の中間改修方法
JP3165362B2 (ja) * 1995-11-28 2001-05-14 川崎製鉄株式会社 高炉の短期改修・建設方法
JP3046552B2 (ja) * 1996-09-27 2000-05-29 川崎製鉄株式会社 高炉炉体構築方法
JP3873549B2 (ja) * 1999-10-29 2007-01-24 住友金属工業株式会社 高炉の改修方法
JP4168869B2 (ja) * 2003-08-05 2008-10-22 Ｊｆｅスチール株式会社 高炉炉底ブロックの鉄皮補強構造
JP4841809B2 (ja) * 2004-04-28 2011-12-21 Ｊｆｅスチール株式会社 高炉建設方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041162A1 (fr) * 1999-03-31 2000-10-04 Kawasaki Steel Corporation Procédé de construction d'un haut fourneau et dispositif de levage transférable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006104229A1 *

Also Published As

Publication number Publication date
JP4822831B2 (ja) 2011-11-24
BRPI0609604A2 (pt) 2010-04-20
WO2006104229A1 (fr) 2006-10-05
CN101155934B (zh) 2011-04-27
BRPI0609604B1 (pt) 2014-06-24
KR20070116920A (ko) 2007-12-11
TWI325014B (en) 2010-05-21
TW200700561A (en) 2007-01-01
JP2006307319A (ja) 2006-11-09
EP1865078B1 (fr) 2012-01-11
CN101155934A (zh) 2008-04-02
EP1865078A4 (fr) 2009-10-21
KR100949854B1 (ko) 2010-03-25

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