WO2007135916A1 - Procédé permettant de démonter la section inférieure d'un haut fourneau - Google Patents

Procédé permettant de démonter la section inférieure d'un haut fourneau Download PDF

Info

Publication number
WO2007135916A1
WO2007135916A1 PCT/JP2007/060043 JP2007060043W WO2007135916A1 WO 2007135916 A1 WO2007135916 A1 WO 2007135916A1 JP 2007060043 W JP2007060043 W JP 2007060043W WO 2007135916 A1 WO2007135916 A1 WO 2007135916A1
Authority
WO
WIPO (PCT)
Prior art keywords
blast furnace
furnace
horizontal
cutting
lateral movement
Prior art date
Application number
PCT/JP2007/060043
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Takasaki
Takashi Hamada
Yuuzi Sudou
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.
Priority to KR1020087027665A priority Critical patent/KR101322251B1/ko
Priority to BRPI0711009A priority patent/BRPI0711009B8/pt
Priority to CN2007800181344A priority patent/CN101448961B/zh
Priority to JP2008516625A priority patent/JP4300249B2/ja
Publication of WO2007135916A1 publication Critical patent/WO2007135916A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/02—Internal forms
    • 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
    • F27B1/12—Shells or casings; Supports therefor
    • F27B1/14—Arrangements of linings

Definitions

  • the present invention relates to a method for dismantling a blast furnace bottom for dismantling the bottom of a furnace in a short time in blast furnace renovation.
  • Patent Document 1 after blowing a blast furnace, the solidified body layer and the bottom brick layer remaining on the bottom of the furnace are taken out of the furnace and removed. After cutting horizontally at a higher position, the furnace body above the cutting position is suspended from the blast furnace furnace shell with jack etc. and fixed, and then the furnace body skin below the cutting position is fixed to the furnace body. A method of dismantling the bottom of the blast furnace is disclosed, which is removed over the entire circumference, and the solidified layer and the bottom brick are drawn out of the furnace together.
  • the dismantling period can be shortened compared to the conventional method in which residues and carbon bricks are divided by blasting and carried out of the furnace.
  • a temporary opening was provided at the bottom of the previous blast furnace furnace, and hot metal and slag staying in the hearth were discharged from the opening, and then water and water were injected from the top of the furnace to cool the residue and furnace. Since this is a dismantling method that will be implemented later, the entire dismantling period is not necessarily large, because the amount of work to disassemble the iron shell dismantling around the entire furnace body, the solidified material layer in the furnace, and the brick at the bottom of the furnace is extremely large. Not shortened.
  • the iron core at the bottom of the blast furnace furnace (furnace iron core below the cutting position of the furnace body) and the furnace bottom plate are cut and separated. Therefore, it cannot be supported by being lifted up or pushed up with a jack. Therefore, it is not possible to place a pull-out rail, roller member, etc. of There is a problem that the drawing work becomes unstable.
  • Patent Document 2 Based on the above-mentioned problems, the applicant of the present invention disclosed in Patent Document 2 that a plurality of cuts were made in advance on the foundation concrete below the floor beam provided at the lower part of the blast furnace body during the operation before the blast furnace blowing.
  • Set the horizontal cutting section divided into cutting sections keep the blast furnace main body in an upright state, cut each cutting section with wire saw, and (i) peelability in the section cut with wire saw Securing and filling the grout material, while supporting the load of the blast furnace body with the hardened grout material, or (ii) Filling with sand or iron particles and supporting the load of the blast furnace body, horizontal cutting
  • the bottom beam of the blast furnace which is integrally coupled with the bottom beam and the mantle force of the furnace bottom, is lifted with a jack, etc., separated from the basic concrete, and the lateral movement means is arranged in the separation space. Then, the bottom of the blast furnace furnace is loaded on the lateral movement means, and then moved laterally and carried out. Therefore, regardless of the solidification state and amount of the residue solidified inside the bottom of the blast furnace, the bottom of the blast furnace can be disassembled and transported with a unified work procedure while containing the solidified residue. The dismantling period can be greatly shortened.
  • a rail member, a carriage, a roller, a pneumatic levitation device, or the like is disclosed as a lateral movement means for carrying out the bottom of the blast furnace furnace.
  • a separation space that is as high as “stagnation of the blast furnace furnace body + height of the lateral movement means + surplus leeway (working space for the lateral movement means, etc.)” is there.
  • the dismantling method described above includes jack-up work for the bottom of the furnace necessary to secure a separation space in consideration of the above-mentioned "stagnation of the blast furnace furnace body", bracket mounting work for jack-up, etc. As the workload increases, there are challenges.
  • the present applicant minimizes the separation space for inserting and arranging the horizontal movement means for carrying out the furnace bottom in Patent Document 3, and does not perform jack-up work.
  • Patent Document 4 in the blast furnace body, the upper part of the range to be removed is separated and removed.
  • the foundation concrete or base grout below the area to be cut is cut with a wire saw, and the joint beam and the bottom mantle force are raised together, and during that time, "sliding" is performed as a lateral movement means for carrying out the bottom of the furnace.
  • Disclosed is a method for removing a blast furnace furnace body in which a member is disposed, the furnace body is lowered onto the lateral movement means, moved laterally, and moved out of the furnace body.
  • Patent Document 1 Japanese Patent Laid-Open No. 10-96005
  • Patent Document 2 Japanese Patent No. 3684201
  • Patent Document 3 Japanese Patent Application No. 2004-379284
  • Patent Document 4 Japanese Patent Application No. 2005-108780
  • An object of the present invention is to provide a universal dismantling method that can dismantle blast furnaces in a shorter period of time, including large blast furnaces, in view of the above-described present state of blast furnace dismantling technology.
  • the inventor lifts the blast furnace bottom or pushes it up with a jack in order to dispose the lateral movement means at the bottom of the blast furnace bottom.
  • the lateral movement means can be placed on the basic concrete or base grout at the bottom of the blast furnace bottom without lifting the bottom of the blast furnace or pushing it up with a jack. Dismantling method 3 ⁇ 413 ⁇ 4 We studied.
  • the foundation concrete or base grout at the bottom of the furnace bottom is cut horizontally with a wire saw to form a gap of the required height, and the lateral movement means is arranged directly in the gap.
  • the present invention is a method for disassembling a blast furnace bottom part by separating the blast furnace bottom part from a basic concrete or a base grout located below the blast furnace bottom part, and carrying out the following steps 1 to It is characterized by carrying out step 7 and then carrying out step 8 below during the repair period after the blast furnace is blown off.
  • Step 1 Set multiple cutting sections parallel to the drawing direction of the bottom of the blast furnace at the horizontal cutting plane set in the foundation concrete or base grout located below the bottom of the blast furnace to be carried out.
  • Step 2 Drill adjacent horizontal holes parallel to the pull-out direction in the foundation concrete or base grout at the boundary of the cutting section.
  • Step 3 Insert a wire wire into the adjacent horizontal hole, and cut the basic concrete of the cutting section along the upper and lower horizontal planes that maintain the required height.
  • Step 4 Drain the cut foundation concrete or base grout between the upper and lower horizontal cut surfaces to form a gap parallel to the drawing direction.
  • Step 5 A laterally moving member for carrying out the blast furnace bottom is disposed in the gap.
  • Step 6 A furnace body load support member for supporting the furnace body load is provided in the space between the upper surface of the laterally moving member and the upper horizontal cut surface disposed in the gap.
  • Step 7 Repeat Step 2 to Step 6 or Step 3 to Step 6, and set the lateral movement means including the lateral movement member ridge and the furnace body load support member to the foundation concrete or base grout. Place it across the entire horizontal cutting area.
  • Process 8 After separating the upper mantel from the bottom of the furnace, it is lifted and a horizontal force is applied to the bottom of the furnace And take it out of the system.
  • all the lateral movement means for laterally moving the furnace bottom portion can be attached during the operation before the blast furnace blowing, which is disclosed in the patent document. It is possible to reduce the number of installation days of the lateral movement means performed after the blowing.
  • a gap is formed in the foundation concrete or base grout at the bottom of the blast furnace furnace so that a lateral movement means including a lateral movement member and a furnace body load support member can be disposed.
  • the horizontal moving means is taken into the section and the load at the top of the cutting is supported by the horizontal moving means, which can be quickly and reliably prepared and completed over the entire horizontal cutting surface at the bottom of the blast furnace furnace. The number of work days required for the preparation work can be reduced.
  • a large-scale apparatus for lifting or jacking up a heavy blast furnace bottom is not required, and a lateral movement member and a furnace body load support member are provided. Since it is only necessary to arrange the lateral movement means in the gap, the number of work days until completion of unloading preparation, that is, the number of work days required for preliminary construction can be greatly reduced.
  • the dismantling period of the blast furnace furnace body can be greatly shortened.
  • the wire of the wire saw along the guide member is placed in the horizontal hole. It is desirable to cut the basic concrete or base grout of the cutting section along the upper and lower horizontal planes that maintain the required height.
  • a lateral movement guide member for preventing a side slip with respect to the index direction during lateral movement is disposed in all or part of the horizontal hole.
  • the wire guide member is a long steel material provided with a tip in the direction of carrying into the horizontal hole and a roller at the tip and the center.
  • the diameter of the horizontal hole is 60 to 200 mm.
  • an interval between the horizontal holes is 0.45 to 5 m.
  • the lateral movement member is composed of a floor plate and a sliding plate.
  • the furnace body load supporting member is composed of one or a combination of two or more of garnet, small particle size! / Spheroid particles, and mortar. Desire ⁇
  • the laterally moving member is composed of a floor plate, a sliding plate, and a lubricant filled between the floor plate and the sliding plate.
  • the total number of the floor plate and the sliding plate is two or more.
  • a lubricant is also supplied to the sliding surface between the floor plate and the sliding plate as a system external force.
  • the furnace body load supporting member is a combination of one or more of garnet, small particle size! / Spheroid particles, and mortar, and a high pack anchor (HPA).
  • HPA high pack anchor
  • a spherical or elliptical iron ball having a small particle diameter and a spherical particle force of a maximum diameter of 10 mm or less is desirable.
  • Step 2 to Step 6 or Step 3 to Step 6 are repeated, it is desirable to appropriately select cutting sections that are not adjacent to each other and to carry out continuously.
  • FIG. 1 is a diagram showing one aspect of a blast furnace and a furnace body according to an embodiment of the present invention.
  • FIG. 2A is a cross-sectional view showing the bottom of the blast furnace in the embodiment.
  • 2B is an enlarged cross-sectional view of part 2B in FIG. 2A.
  • FIG. 3 is a view showing an aspect in which a horizontal cutting portion is set at the bottom of the blast furnace furnace in the embodiment, and a plurality of cutting sections are set at the cutting portion.
  • FIG. 4 is a diagram showing an example of cutting a cutting section at the bottom of the blast furnace furnace according to the embodiment.
  • FIG. 5 is a diagram showing a lateral movement means in the embodiment.
  • FIG. 6 is a view showing a base plate in which grooves for filling a lubricant in the embodiment are formed.
  • FIG. 7A is a diagram showing another aspect of the lateral movement means including a furnace body load support member using a material a.
  • FIG. 7B is a view showing another aspect of the lateral movement means including the furnace body load support member using the HPA + a material.
  • FIG. 7C is a diagram showing another aspect of the lateral movement means including a furnace body load support member using HAP alone.
  • FIG. 8 is a view showing a manner of carrying out the bottom of the blast furnace in the embodiment.
  • FIG. 9 is a view showing a side surface mode of the bottom portion of the blast furnace furnace immediately before carrying out in the lateral movement means using the floor plate and the sliding plate as the lateral movement member in the embodiment.
  • FIG. 10 is a diagram showing a plan view of the bottom portion of the blast furnace furnace immediately before unloading in the lateral movement means using the floor plate and the sliding plate as the lateral movement member in the embodiment.
  • FIG. 11 is a view showing a cross section of the wire guide member in the embodiment.
  • FIG. 12 is a view showing another cross section of the wire guide member in the embodiment.
  • FIG. 13 is a view showing an aspect of a lateral movement guide member that can be used in the embodiment.
  • FIG. 14 is a view showing a state in which a cut portion of the bottom portion of the blast furnace is pulled out.
  • FIG. 15 is a view showing a halfway cutting state of the present invention.
  • FIG. 15B] is a view showing a halfway cutting state of the present invention.
  • FIG. 15C] is a view showing a halfway cutting state of the present invention.
  • FIG. 15 is a diagram showing a halfway cutting state of the present invention.
  • ⁇ 15E] is a diagram showing a completed state of the three-surface cutting of the present invention.
  • FIG. 16 is a diagram showing an example of the present invention.
  • FIG. 17 is a diagram showing an example of the present invention.
  • FIG. 1 shows one embodiment of a blast furnace and a furnace body to which the present invention is applied.
  • the blast furnace 10 is constructed by standing a blast furnace body 13 on a floor beam 12 laid on a foundation concrete 11.
  • a plurality of exhaust pipes 15 are provided in the upper portion of the blast furnace 10, and the blast furnace 10 and the exhaust pipe 15 are supported by a furnace body rod 14 including struts 22 erected at four locations around the blast furnace 10. ing.
  • An annular pipe 16 that surrounds the blast furnace 10 is held at the lower part of the furnace body rod 14, a furnace top outrigger crane 17 for carrying the charging device 19 is provided at the upper end portion, and an intermediate portion is provided at the middle portion. There is a temporary extension deck 18 for maintenance inspection and dismantling of the furnace top equipment.
  • a beam or temporary jack receiving beam 21 to which a center hole jack 50 capable of supporting the blast furnace main body 13 can be attached is arranged at any level of the furnace body rod that can support the blast furnace. It has been.
  • the outer side of the blast furnace body 13 is covered with an iron skin 29, and a number of staple coolers 30 are arranged on the inner side.
  • the blast furnace main body 13 is composed of an upper mantel 34 on the upper side and a mantle 35 on the lower side (containing residual bricks and residue 33).
  • the bottom beam 12 and the furnace bottom mantel 35 which are integrally joined are used as the furnace bottom part 36.
  • FIG. 2A shows a cross-sectional structure of the furnace bottom 36
  • FIG. 2B shows an enlarged state of the 2B portion.
  • the floor beam 12 on the foundation concrete 11 is composed of a number of H-shaped steels 23 arranged side by side, and a furnace bottom plate 26 disposed thereon.
  • a cooling pipe 24 is arranged between the adjacent H-section steels 23, and a grout material 25 or a stamp material 28 is injected and solidified below the cooling pipe 24, respectively.
  • the present invention basically performs the following steps 1 to 7 during the operation of the blast furnace in advance. After that, process 8 is performed during the repair period after the blast furnace is blown off.
  • Step 1 Foundation concrete or base located below the bottom of the blast furnace to be carried out Set multiple cutting sections parallel to the drawing direction at the bottom of the furnace on the horizontal cutting plane set in the grout.
  • Step 2 Drill a horizontal hole parallel to the pull-out direction in the foundation concrete or base grout at the boundary of the cutting section.
  • Step 3 Insert a wire wire into the adjacent horizontal hole, and cut the basic concrete of the cutting section along the upper and lower horizontal planes that maintain the required height.
  • Step 4 Drain the cut foundation concrete or base grout between the upper and lower horizontal cut surfaces to form a gap parallel to the drawing direction.
  • Step 5 A laterally moving member for unloading the furnace bottom is disposed in the gap.
  • Step 6 A furnace body load support member for supporting the furnace body load is provided in a gap between the upper surface of the laterally moving member disposed in the gap and the upper horizontal cut surface.
  • Step 7 Repeat Step 2 to Step 6 or Step 3 to Step 6, and set the lateral movement means including the lateral movement member ridge and the furnace body load support member to the foundation concrete or base grout. Place it across the entire horizontal cutting area.
  • Step 8 After separating the upper mantel from the bottom of the furnace, lift it, apply horizontal force to the bottom of the furnace, and carry it out of the system.
  • Step 1 to Step 4 will be referred to as a furnace bottom portion separation step
  • Step 5 to Step 8 will be referred to as a furnace bottom portion unloading step.
  • a horizontal cutting part 49 is set in advance in the foundation concrete 11 below the floor beam 12 of the furnace bottom part 36, and then the cutting part 49 is parallel to the drawing direction of the furnace bottom part 36.
  • Fig. 3 shows one aspect of the set cutting category.
  • the width of the cutting section is appropriately set in consideration of the size and weight of the furnace bottom. 450-5 000 mm is preferred. Note that the width of the cutting section need not be constant, and may be set as appropriate in consideration of the weight distribution of the furnace bottom.
  • Drill a horizontal hole of the specified diameter (Step 2).
  • the diameter of the horizontal hole is set as appropriate in consideration of the ease of the subsequent cutting work with a wire saw and ensuring a height sufficient to insert and arrange the lateral movement means in the gap formed by this cutting.
  • a force of 60 to 200mm is preferred U ,.
  • the diameter of the horizontal hole is less than 60 mm, it is difficult to insert the two upper and lower wire saws 70, and even if they can be inserted, the upper and lower two surfaces cannot be cut horizontally. Also, if the diameter exceeds 200 mm, it is difficult to drill long holes (for example, about 20 m), and it takes a lot of time to drill holes with a drilling machine. There is no point in increasing the hole diameter.
  • the interval between adjacent horizontal holes is appropriately set in consideration of the size and weight of the bottom of the furnace, the area of the foundation concrete, etc., but is preferably 0.45 to 5m. If the distance between adjacent horizontal holes is less than 0.45 m, the basic concrete with a large resistance at the turn-up portion when the wire saw 70 rotates cannot be cut, and if the distance between adjacent horizontal holes exceeds 5 m, The upper and lower cut surfaces are wavy and it becomes difficult to cut the foundation concrete horizontally.
  • interval between adjacent horizontal holes need not be constant.
  • the dimensions may be changed as appropriate in consideration of the size of the bottom of the blast furnace and the area of the foundation concrete (or base grout).
  • the wires 70a to 70j of the wire saw 70 are passed through the horizontal holes drilled in the respective boundary portions, and the basic concrete remaining in the cutting sections 68a to 68j is inserted at a predetermined height interval, that is, a lateral movement means. Cut along the upper horizontal plane 47 and the lower horizontal plane 48 (see Fig. 2B) to ensure a sufficient spacing between them (step 3), and drain the foundation concrete in the cut-out section to remove the void 56 (Fig. 2B). (See step 4). [0057] In the removal method described in Patent Document 4, after applying a release material to the cut surfaces 47 and 48 of the gap 56, the grout material 25 is filled between the cut surfaces 47 and 48, and the furnace bottom 36 is lifted.
  • the lateral movement means (for example, a sliding member) is arranged on the cut surface 48.
  • a lateral movement means is arranged in the gap 56.
  • the wire of the wire saw 70 cuts the foundation concrete while sliding on the upper surface of the wire guide member, so that the upper and lower cut surfaces maintain a predetermined height interval. It becomes a horizontal plane. As a result, the resistance at the cut surface of the basic concrete when unloading the bottom of the blast furnace becomes small, and the bottom of the blast furnace can be smoothly unloaded.
  • FIG. 11 and FIG. 12 illustrate a cross-sectional state of a wire guide member made of H-section steel.
  • the wire guide member shown in FIG. 11 is obtained by attaching a roller 39 that supports the wire guide member 40 to the tip and center of the lower flange 38 of the H-section steel 37.
  • a roller 39 By attaching a roller 39 to the tip and center of the lower flange 38 of the H-shaped steel 37, the wire guide member 40 can be easily inserted into and removed from the horizontal hole 41.
  • a wire guide member 40 shown in FIG. 12 has a roller 42 that is in contact with the side surface of the horizontal hole 41 at the front end and the center left and right of the web 43 of the H-section steel 37.
  • the upper flange 39 guides the wire saw 70 that cuts the upper foundation concrete
  • the lower flange 38 guides the wire saw 70 that cuts the lower foundation concrete.
  • the cut surface becomes a horizontal plane while maintaining a predetermined height interval.
  • the upper horizontal plane 47 is cut by the upper wire saw 70, and the lower horizontal plane 48 is cut by the lower wire saw 70, thereby forming the horizontal cutting portion 49 (two-side cutting).
  • the roller 42 shown in FIGS. 11 and 12 may be attached in combination.
  • the height interval for cutting with the wire saw that is, the height of the gap may be set as appropriate in consideration of the diameter of the horizontal hole and the height of the lateral movement means. 200mm is preferred
  • the horizontal cutting means 49 (see Fig. 3) is set over the entire area of the basic concrete at the bottom of the bottom of the blast furnace furnace (see Fig. 3).
  • Step 2 to Step 6 or Step 3 to Step 6 It may be done sequentially from the direction (eg from 68a to 63 ⁇ 4), but it is preferable to select non-adjacent cutting sections regularly and carry out continuously! / ⁇ .
  • the cutting section 68e is cut (1 in the figure), then the cutting sections 68a and 63 ⁇ 4 are cut simultaneously (2 in the figure), and then 68c And the 68g cutting section are cut simultaneously (3 in the figure), and finally the remaining cutting sections are cut simultaneously (4 in the figure).
  • a lateral movement means is disposed in the gap 56 (see FIG. 2B) (step 6). Then, repeat Step 2 to Step 6 or Step 3 to Step 6, and over the entire area of the horizontal cutting part 49 set in the basic concrete at the bottom of the blast furnace bottom (see Fig. 3), In addition, a lateral movement means having a furnace body load support member is arranged (Step 7).
  • the lateral movement member may use, for example, a single sheet or a structure in which one or more sliding plates are placed on one sheet. Good.
  • the furnace body load support member placed on the lateral movement member is, for example, a single arrangement of HPA (noy pack anchor, fiber bag filled with mortar), HPA and ⁇ material (Garnet, small spherical particles, mortar, one or more It is composed of a combination arrangement with only material a.
  • HPA noy pack anchor, fiber bag filled with mortar
  • HPA and ⁇ material Garnet, small spherical particles, mortar, one or more It is composed of a combination arrangement with only material a.
  • any one of HPA alone, a combination of HPA and ⁇ material, or ⁇ material alone can be selected as the furnace body load supporting member.
  • one sliding plate 45 is placed on one floor plate 44 as a laterally moving member, on which
  • lateral movement means 53 configured by combining HPA5 la and 5 lbs of lumber as a furnace body load support member is shown.
  • a steel plate (SS material) is suitable as the floor plate, and a single layer of SUS material or a multilayer structure of SUS material and SS material is suitable as the sliding plate.
  • the laterally moving member if the material of the floor plate and the sliding plate is the same, when the lateral movement of the bottom of the blast furnace furnace, slip resistance due to galling easily occurs between the two plates, thereby causing the lateral movement. A large horizontal force is required. Accordingly, it is preferable that the materials of the two plates are different materials.
  • Examples of applications include: 1. Laying plate SS material, sliding plate SUS material, 2. Laying plate SS material, sliding plate SUS material (lower surface) + SS material (upper surface) force.
  • the sliding plate into a multilayer structure composed of SUS material (lower surface) + SS material (upper surface) as described above, it is possible to make the sliding plate cheaper than a single layer of SUS material having the same thickness.
  • the laying plate laid on the bottom surface of the horizontal hole having the concavo-convex surface formed by the wire of the wire saw locally receives the furnace body load via the furnace body load supporting member. Therefore, the thickness of the floorboard is set so that the floorboard is strong enough to withstand the local load. For example, 6 mm or more is preferable.
  • the thickness of the sliding plate does not need to be as strong as that of the floor plate. For example, in the case of a steel plate sliding plate, a steel plate of 2.3 mm or more is sufficient.
  • the laterally moving member may be configured by arranging two or more sliding plates on one sheet. .
  • the laterally moving member may be configured by arranging two or more sliding plates on one sheet.
  • only one floor plate may be used as the lateral movement member.
  • HAP alone or HAP + ⁇ material is placed on the floor plate as a furnace body load support member, the ridge may be damaged during lateral movement. Therefore, when only one sheet is used as the lateral movement member, ⁇ alone and ⁇ + ⁇ material is not suitable as a furnace body load support member, and it is desirable to use only ⁇ material.
  • the material a is preferably filled in a space between the upper surface of the floor plate and the cut surface so as to be in a compacted state.
  • the lateral movement member and the furnace load support member can be easily arranged in the gap, but since only a small lubricating action can be obtained, the indexing force can be increased when the blast furnace bottom is laterally moved. Therefore, an indexing device with a large capacity is required.
  • the construction in the gap is more complicated than when ⁇ material is used.
  • the indexing force is very small when the bottom of the blast furnace bottom where the frictional resistance value is small, so that an indexing device with a small capacity can be used.
  • spherical particles having a small particle size as one kind of the material a spherical or elliptical iron balls having a maximum diameter of 10 mm or less are preferable. It is preferable to use garnet instead of the spherical particles.
  • a lubricant is filled between the floor plate and the sliding plate, and the sliding plate with respect to the floor plate is placed. It is preferable to make the sliding smooth.
  • a floor plate 44 in which grooves 54 are formed may be used, and a lubricant 55 (for example, oil) may be supplied between the floor plate 44 and the sliding plate by a pump P. Filling the gap between the floor plate and the sliding plate makes it possible to carry out the blast furnace bottom out more smoothly, safely and quickly.
  • a lubricant 55 for example, oil
  • 7A to 7C show various modes of the lateral movement means.
  • FIG. 7A shows an embodiment in which an ⁇ material 51b (garnet, spherical particles having a small particle diameter, or one or a combination of two or more mortars) is used as a furnace body load support member.
  • ⁇ material 51b garnet, spherical particles having a small particle diameter, or one or a combination of two or more mortars
  • FIG. 7B shows an embodiment in which HPA51a is filled with 5 lb of alpha material between them.
  • FIG. 7C shows an embodiment using only HPA5 la.
  • any one or two of ⁇ material and HPA may be used in combination as the furnace load support member.
  • the gap between the floor plate and the upper surface of the gap is small, and mortar and firewood cannot be placed and installed on the laterally moving member as a furnace load-bearing member, garnet or spherical particles with a small particle size Is preferred to use.
  • the lateral movement means is arranged in the void 56 (see Fig. 2) of the foundation concrete 11.
  • Step 6 After (Step 6 and Step 7), the upper mantel 34 separated from the bottom of the blast furnace furnace is lifted, and the blast furnace bottom 36 is carried out of the furnace body 14 (outside the system) (Step 8).
  • FIG. 8 shows how the blast furnace bottom is carried out.
  • the upper mantel is separated as follows, for example.
  • the blast furnace 10 is blown off, and the upper or middle of the iron skin 29 of the blast furnace main body 13
  • the suspension bracket 52 is welded and fixed to a plurality of locations, and a plurality of center hole jacks 50 are attached to the furnace body 14, and the blast furnace 10 is connected to the suspension bracket 52 and the center pole jack 50. Suspended and supported by the furnace body 14.
  • an intermediate part of the blast furnace furnace body 13 for example, a part below the level 16 of the annular pipe 16 of the blast furnace furnace body 13 (cut line C1 in FIG. 8) and one or more intermediate parts of the blast furnace furnace body 13 are arranged.
  • This section (cut line C2 in FIG. 8) is cut almost horizontally with a predetermined width to separate the upper mantel 34 from the furnace bottom mantel 35 and divide the upper mantel 34 into a plurality of blocks.
  • the divided blocks of the upper mantel 34 are suspended and held on the furnace body 14 by the suspension bracket 52 and the center hole jack 50, respectively.
  • the blast furnace bottom portion 36 including the furnace body mantel 35 is carried out of the furnace body 14 (outside the system).
  • each block of the upper mantel 34 is sequentially unloaded from the lower one, and all of the upper mantel 34 is unloaded.
  • the blast furnace body 13 is carried out of the furnace body.
  • the furnace top equipment such as the charging device 19 is dismantled and removed using the furnace top outrigger crane 17 and the temporary extension deck 18.
  • construction machines such as dollies and crane cars may be used.
  • Semi-fixed equipment such as conveyors may be installed, or a combination of these may be used.
  • FIGS. 9 and 10 show a state immediately before carrying out when a floor plate and a sliding plate are used as the lateral movement member of the lateral movement means.
  • Fig. 9 shows a side view thereof
  • Fig. 10 shows a plan view thereof. Indicates.
  • a heavy material transport cart 57 is installed adjacent to the foundation concrete 11, and a floor plate 44 disposed in the gap of the foundation concrete 11 is extended on the upper surface of the heavy material transport cart 57. Has been. In this state, the blast furnace bottom 36 is laterally moved to the upper surface of the heavy material transport cart 57 by pulling a pulling wire 59 having one end fastened to a bracket 60 fixed to the blast furnace bottom 36 by the jack 58.
  • the bottom of the blast furnace furnace can be carried out more safely, smoothly and quickly without sliding sideways in the index direction.
  • Another way to prevent skidding is to install guide rails outside the bottom mantel.
  • Skidding may be prevented.
  • the lateral movement guide member may be disposed in the gap immediately after the upper mantel separated from the blast furnace bottom force is lifted, or may be performed together with the lateral movement means.
  • a steel pipe is usually preferable.
  • the present invention is not limited to the above-described embodiment, and the material of each part, the number and arrangement of elements, and the like may be changed as appropriate during implementation. Modifications and the like within a range where the object can be achieved are included in the present invention.
  • the horizontal cut portion 49 of the furnace bottom portion 36 is cut into two planes by the upper horizontal plane 47 and the lower horizontal plane 48 (see Fig. 2B, Fig. 12 and Fig. 13). As you can see, there are three-sided cuts!
  • the cut surface has an uneven shape due to the shake of the intermediate portion of the rotationally driven wire saw 70, the load of the blast furnace body, and the like.
  • the upper horizontal plane 47 and the lower horizontal plane 48 are formed by cutting with the wire saw 70, and the cut portion 36A between them can be pulled out in the horizontal direction.
  • Cut Surfaces 47A and 48A of the protruding portion 36A are formed by cutting with a laser 70 in the same manner as the upper horizontal plane 47 and the lower horizontal plane 48, and have a predetermined interval with respect to the upper horizontal plane 47 and the lower horizontal plane 48 (wire saw 70 (Corresponding to the thickness of the).
  • the swing width of the wire saw 70 also increases. This is not preferable because each becomes larger and it is necessary to reinforce the pull-out force with large interference when pulling out in the horizontal direction.
  • FIGS. 15A to 15E are the same as the two-sided cutting described above, and three-sided cutting is realized by adding FIGS. 15D and 15E.
  • a wire guide member 40 using H-shaped steel 37 similar to that of the above embodiment is introduced into the horizontal hole 41 of the furnace bottom portion 36, and the wire saw 70 is guided by the upper flange 38. While cutting. As a result, the furnace bottom 36 is cut at the upper horizontal plane 47.
  • the wire saw 70 is cut while being guided by the lower flange 39.
  • the furnace bottom 36 is cut at the lower horizontal plane 48, and a region sandwiched between the upper horizontal plane 47 and the lower horizontal plane 48 is cut out as a cut-out portion 36A.
  • a gap of thickness D1 is generated between the furnace bottom portion 36 and the cut-out portion 36A as a cut mark by the wire saw 70 guided by the upper flange 38, and the wire saw 70 guided by the lower flange 39.
  • a gap of thickness D2 is generated as a trace of cutting due to.
  • the cutout portion 36A that has lost its support due to the cutting sinks due to gravity, and a gap D3 is formed only above the cutout portion 36A.
  • the gap D3 corresponds to the sum of the gap D1 and the gap D2 described above.
  • the wire guide member 40A for introducing another wire guide member 40A into the horizontal hole 41 includes guide plates 40B and 40C and a lifting prevention plate 40D.
  • These guide plates 40B and 40C and the lifting prevention plate 40D are each formed of a steel plate, and in the cross-sectional shape, the guide plates 40B and 40C are arranged in parallel to each other, and the lifting prevention plate 40D is disposed at a right angle to the guide plates 40B and 40C. ing.
  • the wire guide member 40A is held so that the guide plates 40B and 40C are horizontal and the anti-lifting plate 40D is vertical when installed in the horizontal hole 41.
  • the upper surface of the lower guide plate 40B is disposed approximately in the middle (slightly below the middle) of the cut-out portion 36A, and the wire saw 70 is guided to the height on this upper surface.
  • the upper guide plate 40C is disposed such that its lower surface is lower than the upper surface of the cut-out portion 36A, and restricts the movement so that the force of the cut-out portion 36A does not come off even when the wire saw 70 shakes.
  • the floating prevention plate 40D prevents the wire guide member 40A from floating by contacting the upper inner surface of the horizontal hole 41.
  • the cut-out portion 36A is cut at the intermediate horizontal plane 49A.
  • the cut-out portion 36A is divided into an upper portion 36B and a lower portion 36C, and a gap having a thickness D4 is generated between them as a cut mark by the wire saw 70.
  • the upper portion 36B that has lost its support due to cutting sinks due to gravity and overlaps with the lower portion 36C, and a gap D5 is formed only on the upper side of the cutout portion 36A.
  • the gap D5 corresponds to the distance obtained by adding the gaps D3 and D4 described above, that is, the distance obtained by adding the distances Dl, D2, and D4 of the three cuts.
  • the wire guide member 40A is extracted.
  • the three-sided cutting is performed, and a larger gap D5 than the two-sided cutting described above is obtained. For this reason, even when the upper horizontal plane 47 and the lower horizontal plane 48 are uneven, the large gap D5 can avoid interference during pulling out, and the cutout portion 36A can be pulled out smoothly.
  • the position 1.5m below the bottom of the furnace was set as a horizontal cutting section, and 13 cutting sections with a width of 1.5m were set in the cutting section.
  • a horizontal hole with a diameter of 100 mm was drilled at the boundary of the cutting section, and the foundation concrete between the horizontal holes was cut horizontally at a height interval of 70 mm, and the foundation concrete in the cut part was discharged.
  • the number of work days has been greatly reduced compared to the 17 work days previously required to carry out the bottom of the furnace of the same scale.
  • the conditions of the above-described embodiments are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is not limited to these one condition examples.
  • the present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.
  • one sliding plate 45 is placed on one floor plate 44 as a laterally moving member, and HPA51a and ⁇ material 51b are placed in combination on it as a furnace body load support member.
  • the lateral movement means 53 configured as described above was used.
  • HPAs 51a are provided, each of which has a cylindrical shape made of laminated fibers, and the length of the horizontal portion is about 18 m.
  • the mortar filling pipe 51c has a 50A diameter pipe arranged vertically and is filled with non-shrink mortar using a head pressure of 2 m in height.
  • the lower end of pipe 5 lc is bent in the horizontal direction and connected to HPA51a.
  • the end of the HPA 51a is drawn out from the furnace bottom 36, and is put on the lower end of the pipe 51c and fixed by a fastening band 51d.
  • Example 5 Measure A implemented, Measure B absent, Measure C implemented. ... Countermeasure C + Countermeasure A
  • each countermeasure is as follows. Apply coating to the inner surface of the HPA (Countermeasure A), immerse the HPA in water before filling the mortar (Countermeasure B), and piping that does not cause a sudden squeeze in the mortar flow path. (Countermeasure C)
  • a loose throttle pipe 51e is installed in the part introduced from the pipe 51c to the HPA 51a, and the pipe 51c is also changed to a smaller diameter 32A.
  • the throttle tube 51e has a diameter of 32A at the base end and is connected to the end of the pipe 51c, and a thin tube at the front end.
  • the throttle tube 51e is inserted into the HPA5 la in the furnace bottom 36 for a length of 100 mm. Yes.
  • the distal end side and the proximal end side of the throttle tube 51e are formed into a very gentle conical shape. Mortar from c is squeezed very gently and introduced into HPA51a.
  • the mortar filling was inadequate for mortar outflow from any HPA5 la outlet (the end opposite to the inlet side where mortar was injected). It is presumed that the water in the mortar was squeezed out through the HPA at the sharply squeezed part of the HPA51a inlet, creating a mortar mass and blocking the flow.
  • the present invention can be used as a method of dismantling the blast furnace bottom for dismantling the furnace bottom in a short time in blast furnace renovation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

La présente invention concerne un procédé permettant de démonter un haut fourneau qui comprend les étapes suivantes allant de 1 à 8. Étape 1 : une pluralité de sections de coupe est disposée dans une direction parallèle à la direction de traction sur un plan de coupe horizontal placé dans le béton de fondation sur la partie inférieure d'un haut fourneau. Étape 2 : un trou horizontal est creusé parallèlement à la direction de traction dans le béton de fondation à la limite des sections de coupe. Étape 3 : le béton de fondation présent dans la section de coupe est taillé le long des plans horizontaux supérieur et inférieur par introduction d'un fil dans les trous horizontaux adjacents. Étape 4 : un intervalle d'air est crée lors de la décharge du béton de fondation entre les plans de coupe horizontaux supérieur et inférieur. Étape 5 : un élément amovible latéral destiné à sortir la section inférieure du haut fourneau est installé dans l'intervalle d'air. Étape 6 : un élément de support de charge de corps de fourneau est placé dans l'intervalle entre la surface supérieure de l'élément amovible latéral et le plan de coupe horizontal supérieur. Étape 7 : des moyens de mouvement latéral équipés de l'élément amovible latéral et de l'élément de support de charge de corps du fourneau sont installés sur toute la zone d'une portion de coupe horizontale par répétition des étapes 2 à 6 et des étapes 3 à 6. Étape 8 : une marâtre supérieure est séparée de la partie inférieure du fourneau, levée et sortie par application d'une force horizontale.
PCT/JP2007/060043 2006-05-18 2007-05-16 Procédé permettant de démonter la section inférieure d'un haut fourneau WO2007135916A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020087027665A KR101322251B1 (ko) 2006-05-18 2007-05-16 고로 노 저부의 해체 방법
BRPI0711009A BRPI0711009B8 (pt) 2006-05-18 2007-05-16 método de desmonte da seção inferior de alto-forno
CN2007800181344A CN101448961B (zh) 2006-05-18 2007-05-16 高炉炉底的拆除方法
JP2008516625A JP4300249B2 (ja) 2006-05-18 2007-05-16 高炉炉底部の解体方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006138733 2006-05-18
JP2006-138733 2006-05-18

Publications (1)

Publication Number Publication Date
WO2007135916A1 true WO2007135916A1 (fr) 2007-11-29

Family

ID=38723230

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/060043 WO2007135916A1 (fr) 2006-05-18 2007-05-16 Procédé permettant de démonter la section inférieure d'un haut fourneau

Country Status (5)

Country Link
JP (1) JP4300249B2 (fr)
KR (1) KR101322251B1 (fr)
CN (1) CN101448961B (fr)
BR (1) BRPI0711009B8 (fr)
WO (1) WO2007135916A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101307652B (zh) * 2008-06-19 2010-04-21 武汉冶建安装工程有限责任公司 高炉炉底耐热基墩的拆除方法
CN109097516A (zh) * 2018-09-29 2018-12-28 中国冶集团有限公司 高炉大修工程更换高炉炉壳的施工方法
WO2021035974A1 (fr) * 2019-08-29 2021-03-04 上海宝冶冶金工程有限公司 Système et procédé de transport pour enveloppe de haut fourneau

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008159427A (ja) * 2006-12-25 2008-07-10 Rohm Co Ltd ヒータ
JP5193535B2 (ja) * 2007-09-05 2013-05-08 新日鉄住金エンジニアリング株式会社 高炉炉底部の解体方法
JP5577450B1 (ja) 2013-07-30 2014-08-20 新日鉄住金エンジニアリング株式会社 高炉の改修方法
CN105821166A (zh) * 2015-01-05 2016-08-03 上海宝冶集团有限公司 一种特大型高炉炉模块化快速拆除方法
CN105821900A (zh) * 2015-01-05 2016-08-03 上海宝冶集团有限公司 一种特大型高炉混凝土基础在线精确开设隧道方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002339007A (ja) * 2001-03-16 2002-11-27 Nippon Steel Corp 高炉炉底部の解体方法
JP2006183105A (ja) * 2004-12-28 2006-07-13 Nippon Steel Corp 高炉炉体の撤去方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2602407B2 (ja) * 1994-01-07 1997-04-23 川崎製鉄株式会社 高炉炉底内容物の炉外搬出方法
CN1222579A (zh) * 1998-12-02 1999-07-14 酒泉钢铁(集团)有限责任公司 高炉大修整装推移技术和装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002339007A (ja) * 2001-03-16 2002-11-27 Nippon Steel Corp 高炉炉底部の解体方法
JP2006183105A (ja) * 2004-12-28 2006-07-13 Nippon Steel Corp 高炉炉体の撤去方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101307652B (zh) * 2008-06-19 2010-04-21 武汉冶建安装工程有限责任公司 高炉炉底耐热基墩的拆除方法
CN109097516A (zh) * 2018-09-29 2018-12-28 中国冶集团有限公司 高炉大修工程更换高炉炉壳的施工方法
WO2021035974A1 (fr) * 2019-08-29 2021-03-04 上海宝冶冶金工程有限公司 Système et procédé de transport pour enveloppe de haut fourneau

Also Published As

Publication number Publication date
CN101448961B (zh) 2011-08-24
BRPI0711009B8 (pt) 2017-02-07
KR101322251B1 (ko) 2013-10-28
CN101448961A (zh) 2009-06-03
KR20090007752A (ko) 2009-01-20
JPWO2007135916A1 (ja) 2009-10-01
JP4300249B2 (ja) 2009-07-22
BRPI0711009B1 (pt) 2016-02-10
BRPI0711009A8 (pt) 2015-09-22
BRPI0711009A2 (pt) 2014-03-11

Similar Documents

Publication Publication Date Title
WO2007135916A1 (fr) Procédé permettant de démonter la section inférieure d'un haut fourneau
JP3546754B2 (ja) 高炉の短期改修・建設方法およびリング状ブロックの上架装置
KR100909508B1 (ko) 고로 노체의 철거 방법
JP2007084856A (ja) 高炉の残銑の撤去方法
JP2006283183A (ja) 高炉炉体の撤去方法
JP3684201B2 (ja) 高炉炉底部の解体方法
JP3165362B2 (ja) 高炉の短期改修・建設方法
WO2010027066A1 (fr) Procédé de démontage de fond de haut-fourneau et dispositif de transport
WO2015016220A1 (fr) Procédé de réparation de haut fourneau
JP5193535B2 (ja) 高炉炉底部の解体方法
JP6702026B2 (ja) コークス炉煉瓦の解体方法
KR100478107B1 (ko) 고로 노저부의 해체방법
JP3724308B2 (ja) 高炉の改修方法
JP4220926B2 (ja) 高炉の改修工法
JP2005314735A (ja) 高炉建設方法
CN215292486U (zh) 一种不影响出渣且可上下交叉作业的竖井口移动作业平台
JP3873549B2 (ja) 高炉の改修方法
JP2001081508A (ja) 高炉の改修方法
CN220378269U (zh) 一种竖井压力钢衬弯管快速安装装置
JP4505355B2 (ja) 高炉の改修工法
JP3591431B2 (ja) 高炉炉底部の解体方法
JP5225614B2 (ja) 高炉の残銑の撤去方法
CN210483759U (zh) 一种隧道多功能便捷钢架台车
JP3591432B2 (ja) 高炉炉底部の解体方法
JP2010215985A (ja) 高炉の炉底ブロックの交換方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780018134.4

Country of ref document: CN

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

Ref document number: 07743478

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1020087027665

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2008516625

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 6522/CHENP/2008

Country of ref document: IN

122 Ep: pct application non-entry in european phase

Ref document number: 07743478

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: PI0711009

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20081114

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)