EP2305840A1 - Procédé pour construire et réparer un corps de haut-fourneau - Google Patents

Procédé pour construire et réparer un corps de haut-fourneau Download PDF

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Publication number
EP2305840A1
EP2305840A1 EP09803034A EP09803034A EP2305840A1 EP 2305840 A1 EP2305840 A1 EP 2305840A1 EP 09803034 A EP09803034 A EP 09803034A EP 09803034 A EP09803034 A EP 09803034A EP 2305840 A1 EP2305840 A1 EP 2305840A1
Authority
EP
European Patent Office
Prior art keywords
furnace body
ring block
ring
blocks
ring blocks
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
EP09803034A
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German (de)
English (en)
Other versions
EP2305840B1 (fr
EP2305840A4 (fr
Inventor
Masao Fujita
Takahiro Kumeta
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.)
JFE Steel Corp
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JFE Steel Corp
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Filing date
Publication date
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Publication of EP2305840A1 publication Critical patent/EP2305840A1/fr
Publication of EP2305840A4 publication Critical patent/EP2305840A4/fr
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    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a method for constructing a blast furnace body and a method for revamping a blast furnace body in which the blast furnace body is formed into ring blocks.
  • the present invention particularly relates to a method contributing to achievement of new construction and revamping of a blast furnace in a short period.
  • ring blocks into which a furnace body is divided from its furnace top section to its furnace bottom section.
  • ring blocks other than a furnace bottom section.
  • the top ring block is first lifted up in the caisson to the height under which an upper ring block to be stacked under the top ring block can be put by means of a winch or the like provided in a scaffold attached to the blast furnace.
  • the upper ring block is carried in next just under the top ring block.
  • the top ring block is then lifted down and superposed on the upper ring block.
  • lifting equipment provided in the attached scaffold such as a winch, a lift jack, which is a hydraulic lift jack, a wire jack and a center hole jack
  • lifting equipment provided in the attached scaffold such as a winch, a lift jack, which is a hydraulic lift jack, a wire jack and a center hole jack
  • the ring blocks would be cut off in order from a lower ring block and upper ring blocks would be lifted to carry the lower ring block out of the caisson by means of transporting trucks, contrary to the case of the above-mentioned assembling operation.
  • a fulcrum for lifting up a ring block is arranged discretely divided in the scaffold and/or a supporting column so that separately provided lifting equipment would be used to lift up the respective ring blocks.
  • a top ring block A manufactured in a factory or the like is first carried into a caisson 5 as shown in Fig. 1 while the top ring block A is lifted up by means of lifting equipment Wa to a gap height under which a subsequent upper ring block B can be put in the caisson 5.
  • the upper ring block B is then carried into the caisson 5 as shown in Fig. 2 .
  • the upper ring block B is lifted up by means of lifting equipment Wb.
  • plural pieces of lifting equipment Wa and Wb are used to lift up both of the ring blocks A and B at a stroke to a gap height under which a next ring block C can be put.
  • the lower ring block C is then carried into the formed gap in the caisson 5.
  • the lower ring block C is lifted up by means of another lifting equipment Wc to the height under which a subsequent ring block D can be put, as shown in Fig. 3 .
  • the subsequent ring block D which is the furnace bottom section ring block to be located at the lowest place, is then carried into the caisson 5.
  • the respective ring blocks are stacked in order of D ⁇ C ⁇ B ⁇ A at this stage, as shown in Fig. 4 .
  • the respective ring blocks are welded and connected in order after the above.
  • the blast furnace is constructed or revamped in such a conventional method.
  • Patent Reference 1 discloses another method for shortening time to connect the vertically adjacent ring blocks.
  • Patent Reference 2 proposes a method of revamping and/or constructing a blast furnace for shortening time by dividing a welding operation of the ring blocks into two steps.
  • a furnace shell of an old furnace body is partially cut off when the furnace shell is previously cut into the shape of a ring for the purpose of dismantling the old furnace body into the plural ring blocks, for example.
  • An uncut part (a remaining part) is partially left so that it would be used for lifting a lower ring block.
  • an upper ring block bears the weight of a ring block located under the cut section. That is to say, the ring block located under the cut section is put on the caisson 5, and then, the uncut furnace shell is cut off and the upper and lower ring blocks having the cut section therebetween are completely separated, thereafter, the separated ring block of the old furnace body is carried out of the caisson 5.
  • an upper ring block and a lower ring block which form a new furnace body, are directly welded to each other for connection in assembling the new furnace body under the conventional construction method. That is to say, a top ring block, which is located at a furnace top section, is first carried into the caisson and lifted up. A subsequent upper ring block to be connected with the top ring block, the subsequent upper ring block being located on a lower side of the top ring block, is then carried in to perform centering and alignment of respective furnace shell connecting parts. The respective furnace shell connecting parts are welded after the above so that the top ring block would be connected with the upper ring block.
  • a pushed side is raised when the distance between the lift jacks 3a and 3b is larger than the diameter of the ring block A, as shown in Fig. 8(b) . Accordingly, it is necessary in such a centering and aligning operation to perform an operation of delicately lifting up or down the upper ring block A in the case that the amount of difference in alignment is large. This requires 10 to 20 hours, 24 hours in some cases, as described above.
  • the time for cutting and separating ring blocks of an old furnace body in dismantling and for welding and connecting ring blocks of a new furnace body in assembly amounts 50 to 80 hours in total. This means that the time for the operations account for around half of time for the whole steps from dismantling of the old furnace body to assembly of the new furnace body.
  • the present invention proposes a method of using a connection tool to simply carry out separation of old furnace body or temporary connection of upper and lower ring blocks of new furnace body instead of a method of remaining an uncut part in dismantling of the old furnace body and performing centering, alignment and welding of the ring blocks in assembling of the new furnace body.
  • Each of the separated ring blocks is put in the caisson one by one, and then, the connection tool is cut (separated) before the separated ring block is carried out. This allows many pieces of lifting equipment to be made unnecessary. Further, the respective ring blocks can be separated more quickly than the case of gas-cutting an uncut part of the furnace shell later.
  • the ring blocks can be carried out quickly only with an operation of cutting (separating) the connection tool instead of a series of the operations. This allows time for the separating operation to be greatly shortened.
  • the top ring block located on an upper side is first carried into the caisson to be lifted by means of the lifting equipment.
  • a subsequent upper ring block, which is to be connected with the top ring block, is then carried into the caisson and stacked. Connection parts of the furnace shells of the upper and lower ring blocks are connected at that time.
  • the upper and lower ring blocks are not directly welded and connected to each other in this stage.
  • the upper ring block is first temporarily connected with the lower ring block through the connection tool.
  • the respective ring blocks are then temporarily connected with each other by means of the connection tool and the furnace bottom section ring block is installed in the caisson.
  • the upper ring blocks are centered and aligned in order after the above.
  • the respective connection parts are welded to complete assembly of the furnace body.
  • the respective ring blocks forming a new furnace body can be simultaneously welded to each other in parallel. This contributes to shortening of the operation time.
  • a step of stacking bricks in the furnace which has been originally a subsequent step, can be also performed in parallel in the assembly construction method.
  • the method having the above structure, expected can be the following advantages.
  • a method of revamping a blast furnace in accordance with the present invention on the basis of a ring block construction method adopted with a slope extended to a caisson.
  • a method of constructing a new blast furnace is same as a step of assembling a new furnace body in a below-mentioned method of revamping a blast furnace.
  • the present invention is not limited only to the following concrete examples.
  • Fig. 9 illustrates an example of dismantling an old furnace body, showing a condition of separating a lowest furnace bottom section as a furnace bottom section ring block to start dismantling.
  • a furnace top section block and a furnace bottom section block may have no ring shape in some cases in dismantling and assembling new and old furnace bodies by means of plural ring blocks in the present invention. For the purpose of description, however, they are collectively referred to as ring blocks in the invention.
  • a numeral 1 shown in Fig. 9 denotes a supporting column.
  • 2 denotes an upper attached scaffold.
  • 3 denotes a lift jack used as lifting equipment of ring blocks, the lifting equipment provided in the attached scaffold.
  • 4 denotes a furnace body.
  • 4A to 4D denote divided ring blocks.
  • 5 denotes a caisson, which is a caisson of a blast furnace
  • 6 denotes a slope
  • 15 denotes a transporting truck.
  • Fig. 9 shows a condition that a furnace bottom section ring block 4D, which has been cut and carried out, is carried out to a slope 6.
  • Fig. 10 shows a structure of a cut part in dismantling an old furnace body into blocks. A furnace shell of the old furnace body is to undergo a cutting step from the outside.
  • a numeral 14 in Fig. 10 denotes a cut part of the furnace shell. 7 and 8 denote furnace shells, which are respectively formed into an upper ring block and a lower ring block after a cut, in Fig. 10.
  • 9 denotes a stave. 10 denotes refractories.
  • Fig. 10 denotes refractories.
  • a position of the cut is located in a place where the refractories 10 are embedded between the staves 9. It is, however, not limited only to the above and may be located in a place where the stave 9 is embedded.
  • a part other than the furnace shell can be separated since it is the stave 9 and a cooling water supplying pipe vertically extending on upper and lower sides of the stave 9, lining refractories, or deposit in the furnace so long as a furnace shell part can be cut and separated.
  • Fig. 9 shows an example that the old furnace body is divided into four ring blocks 4A to 4D for the purpose of dismantling. For the dismantling, preferable is division into three to five ring blocks in accordance with a size of the furnace body and the like.
  • Fig. 11 shows a structure of a cut part in dismantling an old furnace body in accordance with the method of the present invention.
  • Fig. 11 shows a condition that upper and lower ring blocks are temporarily connected via a connection tool 13.
  • Plural pairs of brackets 11 and 12 are welded and fixed to the furnace shell 7, which is formed into the upper ring block, and the furnace shell 8, which is formed into the lower ring block, in advance in the vicinity of an upper end part and a lower end part of the furnace shells 7 and 8 along a cut part and a connected part of the furnace shells, as shown in Fig. 11 .
  • a connection member 13a formed from a wire, a rod, a chain or the like is mounted between the both brackets 11 and 12 to form the connection tool 13.
  • connection member 13a is formed from a flexible material such as a wire chain, for example, and a variable connection tool enabling at least one of the upper and lower ring blocks to be movable in the horizontal direction is used.
  • a connection tool 13 includes a variable connection tool, hereinafter.
  • connection tool 13 is mounted later and used for temporarily connecting the upper and lower ring blocks with each other.
  • connection tool 13 can be carried out simultaneously with a cutting operation. That is to say, in cutting the furnace shells 7 and 8 into the ring blocks, namely, before completing the cutting operation or during the cutting operation, for example, most of the furnace shell is cut in advance and the connection tool is mounted to the cut part simultaneously with the cutting operation.
  • the lower ring block is lifted up and held of the upper ring block through the connection tool 13, especially, the connection member 13a, after the upper ring block and the lower ring block are separated.
  • the furnace shell has been remained uncut (an uncut part) as long as the length necessary for holding a subsequent lower ring block in the conventional step of cutting the ring blocks.
  • all ring blocks have been lifted down by means of a lift jack to be put on the transporting truck 15 in the caisson 5.
  • the lower ring block which should be carried out, has not been completely separated until the uncut part of the upper ring block has been cut.
  • the respective ring blocks 4A, 4B and 4C are temporarily connected by means of the connection tool 13 in advance during or before the cutting operation when the ring blocks 4A, 4B and 4C are separated, as shown in Fig. 12 , in the present invention.
  • the ring block 4C is cut and separated to be carried out, for example, the ring blocks 4A, 4B and 4C, which have been temporarily connected by means of the connection tool 13, are lifted down by means of the lift jack 3 provided in the lower attached scaffold 1 to put the ring block 4C on the transporting truck 15 in the caisson 5.
  • the connection tool 13 connecting the ring blocks 4B and 4C is then cut off, and thus, the ring block 4B and ring block 4C are completely separated at that time.
  • the ring block 4C is put on the transporting truck 15 to be carried out of the caisson 5 through the slope 6 after the above.
  • connection tool 13 is formed from the connection member 13a such as a wire and a rod (a rod is fasten by means of a nut 16 in Fig. 11 .), which is mounted between the brackets 11 and 12 fixed by welding to outer surfaces of the furnace shells 7 and 8 located on upper and lower sides of a cutting line, a pair of the upper and lower brackets 11 and 12 being mounted in plural umbers in the circumferential direction.
  • Both of the ring blocks 4A and 4B are first lifted down by means of the lift jack 3 to put the ring block 4B on the transporting truck 15 in the caisson 5.
  • the connection member 13a is then cut off so as to separate the ring block 4B from the ring block 4A. Therefore, in accordance with the construction method according to the present invention required for an operation of separating the respective ring blocks is only a weld-cutting operation of several connection members 13a by means of a gas torch, the connection members 13a being mounted along a cutting line in a circumferential direction of the furnace. This allows operation time to be greatly shortened in comparison with the conventional cutting operation of an uncut part.
  • connection tool 13 In Fig. 11 , the brackets 11 and 12 and the connection member 13a, which form the connection tool 13, are used for temporarily connecting the upper and lower ring blocks (shown as the furnace shells 7 and 8) with each other. They are cut off in carrying out the ring block in order to separate the respective ring blocks. The number and strength of the connection tool 13 is not fixed so long as the connection tool 13 can lift down and hold the subsequent lower ring block.
  • the connection member of the example shown in Fig. 11 for example, is formed from a combination of the connection member 13a and the nut 16.
  • each ring block is individually lifted up by means of a lift jack (such as a so-called “center hole jack” using several wires to equally carry out raising and lowering), the lift jack being provided separately in the attached scaffold and/or the supporting column.
  • a lift jack such as a so-called "center hole jack” using several wires to equally carry out raising and lowering
  • the embodiment is an example of dismantling by dividing a furnace body 4 into the ring blocks 4A to 4D as shown in Fig. 13 .
  • the example is different from that of Fig. 9 in that the ring blocks 4A, 4B and 4C are lifted separately by means of a lift jack 3a for lifting up the ring blocks 4A and 4B and a lift jack 3b for lifting up the ring block 4C.
  • Other points such as cutting, separation, carrying out and the like in dismantling an old furnace body, however, are the same as the example shown in Fig. 9 . Further concrete description will be given below.
  • the embodiment is characterized in that the ring blocks 4A and 4B and the ring block 4C are lifted respectively by means of the different lift jacks 3a and 3b in carrying out the lower ring block 4C subsequently to the furnace bottom section ring block 4D while the ring blocks 4A and 4B are temporarily connected by means of the connection tool 13, as shown in Fig. 14 . That is to say, the ring block 4C is separated as it is to be lifted down as shown in Fig. 14 since it is held by means of the lift jack 3b differently from the ring blocks 4A and 4B. The lifted-down ring block 4C is put on the transporting truck 15 in the caisson 5 to be carried out.
  • connection tool 13 In order to separate the upper ring blocks 4A and 4B, most part of the furnace shell of the old furnace body is first cut in advance before or during the cutting operation of the furnace shell or when the furnace shell is cut into the shape of a ring.
  • the connection tool 13 is then mounted to a part, which has been cut off, to temporarily connect the both ring blocks 4A and 4B.
  • the ring blocks 4A and 4B having been temporarily connected by means of the connection tool 13 are lifted down by means of the lift jack 3a after the above.
  • the connection member 13a of the connection tool 13, which connects the ring blocks 4A and 4B, is then cut off, so that the ring blocks 4A and 4B are completely separated at that time. This allows the ring block 4B to be carried out.
  • the ring block 4A is finally lifted down as it is to be carried out.
  • the old furnace body is thus completely dismantled.
  • the embodiment is a method also applied as it is for construction of a new blast furnace.
  • the furnace top section ring block 4A which is located at the top of the furnace body, is first carried into the caisson 5 through the slope 6 while it is put on the transportation truck 15, as shown in Fig. 15 .
  • the furnace top section ring bock 4A is then lifted up by means of a lift wire of the lift jack 3a.
  • the upper ring block 4B which is to be located under the furnace top section ring block 4A located at the top of the furnace, is carried into the caisson 5 by means of the transporting truck 15 so as to be provided in a space created by lifting up the ring block 4A, as shown in Fig. 16 .
  • a lower end part of the ring block 4A is temporarily connected with an upper end part of the ring block 4B by means of the connection tool 13.
  • Fig. 17 shows an example of the temporary connection of the furnace top section ring block 4A and the upper ring block 4B.
  • the brackets 11 and 12 are first welded and fixed in advance to a lower end part of the furnace shell 7 of the furnace top section ring block 4A and an upper end part of the furnace shell 8 of the upper ring block 4B.
  • connection member 13a such as a wire and a rod
  • a wire of the wire clamp device 13b in the example shown in Fig. 17 .
  • the brackets 11 and 12 are thus connected to form the connection tool 13, which is used in the example.
  • connection tools 13 are provided in a circumferential direction of the furnace. Basically, used are the connection tools similar to the above-mentioned connection tools used in the dismantlement. Using a variable connection tool having a structure that any one or both of the furnace top section ring block 4A and the upper ring block 4B is movable in a horizontal direction in a condition of temporary connection of the ring blocks 4A and 4B, however, is effective since centering in the caisson 5 is necessary in assembling a new furnace body.
  • variable connection tool 13 for example, preferable is one formed from a flexible material between the brackets 11 and 12, the flexible material enabling at least one of the ring blocks to move in the horizontal direction even in the condition of the temporary connection, or a connecting means allowing the horizontal movement of the ring block,
  • a wire, a chain and such, which can bear a heavy load, are preferable as the former material while a rod is preferably used as the latter means.
  • variable connection tool 13 preferably has a structure of a bearing seat provided on brackets 11 and 12 sides, the bearing seat capable of corresponding to an incline of the rod in an operation of the horizontal movement, or a structure of a bracket provided with an opening having a diameter capable of permitting an incline of the rod.
  • the upper and lower brackets 11 and 12, which are formed into a pair and provided in plural pairs, are preferably provided substantially horizontally.
  • the connection tool 13 used in a step of dismantling an old furnace body is only for lifting and holding the lower ring block. Accordingly, no such a variable connection tool as described above is required since there is no necessity of centering and alignment and the connection tool 13 is to be cut later.
  • the variable connection tool may be used in the dismantling step.
  • the ring blocks 4C and 4D are temporarily connected by means of the variable connection tool 13, for example, in a way similar to the method shown in Fig. 15 so as to perform lifting and holding.
  • a new furnace body is divided into four as an example.
  • the division is made into three, five, six or more in some cases in accordance with a size of the blast furnace.
  • the method of connection can be similar to the above even in such a case.
  • the furnace bottom section ring block 4D which is to be located in the lowest position, is then carried in according to a step similar to the above.
  • the furnace bottom section ring block 4D is temporarily connected by means of the variable connection tool 13 in the same way. All of the ring blocks 4A, 4B, 4C and 4D are collectively lifted up while the transportation truck 15 is sided away so that the ring blocks would be fixed on the caisson 5.
  • the lowest furnace bottom section ring block 4D is first centered, and then, the ring blocks 4C, 4B and 4A are centered and stacked in order from the upper ring block.
  • considered may be a method in which the ring blocks 4C to 4A are once collectively lifted up to carry in the lowest furnace bottom section ring block 4D, centering is performed for the purpose of specifying a construction location of the lowest furnace bottom section ring block 4D, the lowest furnace bottom section ring block 4D is fixed, and then, the ring blocks 4A, 4B and 4C, which have been lifted up, are centered and stacked in order of the upper ring block 4C, the ring block 4B and the ring block 4A.
  • the furnace bottom section ring block 4D is extremely heavy especially in the case of building a brick construction (including monolithic refractories) in the lowest furnace bottom section ring block 4D in advance. This causes a possibility of a crack and the like of the brick construction due to a bend of the ring block in lifting up the ring block.
  • the lowest furnace bottom section ring block 4D which has been carried in, is first moved and centered for positioning without lifting up the ring block 4D, and then, completely fixed on the caisson 5.
  • the ring blocks 4A, 4B and 4C having been lifted up as described above are centered and aligned with respect to the fixed lowest furnace bottom section ring block 4D to be stacked in order from the upper ring block 4C.
  • a side surface of the upper furnace body block is pushed in a horizontal direction or a circumferential direction of the furnace by means of the plural lift jacks 3a to perform centering and alignment with the furnace body.
  • the centering is carried out in order from the ring block 4D, for example.
  • a side surface of the upper ring block 4C is pushed in the horizontal direction or the circumferential direction of the furnace by means of the lift jack 3a to be centered and aligned with the lower ring block 4D for the purpose of positioning.
  • variable connection tool 13 allows the operation to be simply and quickly performed since the upper ring blocks 4B and 4C are movable in the horizontal direction.
  • the centering and aligning operation is similarly carried out between the ring blocks 4B and 4C and between the ring blocks 4A and 4B.
  • the ring blocks 4A to 4D which have been centered and aligned as described above and have been stacked, are welded and connected completely after the above. That is to say, after the steps of carrying in, temporarily connecting, centering and aligning and stacking the respective ring blocks 4A to 4D, which are to be formed into a new furnace body, welded and connected is the edge preparation part 21 provided in the gap, which is to be a connection part of the adjacent ring blocks. Assembly of the furnace body is thus completed.
  • the connection tool 13 is weld-cut to be removed at the completion or after the above operation.
  • FIG. 1 Another embodiment of the present invention is a method constructing and revamping a blast furnace in which the ring blocks are respectively lifted up by means of the lift jacks having different roles, the lift jacks separately provided so that a location of lifting up the ring block would be in an attached scaffold 2 of the blast furnace and/or the supporting column 1.
  • Fig. 20 shows a condition that the furnace top section ring block 4A provided at the top is carried in and taken in.
  • the subsequent upper ring block 4B is carried in after the furnace top section ring block 4A is carried in, as shown in Fig. 21 .
  • the furnace top section ring block 4A and the upper ring block 4B are temporarily connected via the connection tool 13 to be lifted up and held together by means of the lift jack 3a.
  • the furnace top section ring block 4A and the upper ring block 4B which have been held by means of the lift jack 3a, are lifted up while the subsequent further lower ring block 4C is carried into a space under the ring blocks 4A and 4B, as shown in Fig. 22 .
  • the lower ring block 4C is held by means of the lift jack 3b different from the lift jack 3a.
  • the lower ring block 4C is lifted up by means of the different lift jack 3b, as shown in Fig. 23 .
  • a space under the ring block 4C carried in is the lowest furnace bottom section ring block 4D.
  • the lower ring block 4C and the furnace bottom section ring block 4D are temporarily connected and lifted and held via the variable connection tool 13, preferably.
  • the lower ring block 4C and the furnace bottom section ring block 4D are movable it the horizontal direction since they are lifted and held through the variable connection tool 13. This allows the furnace bottom section ring block 4D to be simply and quickly fixed in the caisson 5 and centered.
  • both of the lower ring blocks 4C and 4B move easily in the horizontal direction in centering and aligning the lower ring blocks 4C and 4B in the case that the ring block 4B is lifted up and held on the furnace top section ring block 4A through the variable connection tool 13. This results in simple centering and alignment of the upper ring block and the lower ring block.
  • the furnace bottom section ring block 4D is put on a level adjusting frame 17, which can be adjusted to the level same as that of the caisson 5, and carried, as shown in Fig. 24 , in the case of using the transporting truck 15 without the slope 6 shown in Fig. 23 .
  • the furnace bottom section ring block 4D is put on a truck 20, which runs on a running rail 18.
  • the lower ring block 4C is lifted up by means of the lift jack 3b.
  • the lowest furnace bottom section ring block 4D is moved on the rail 19 to be carried into a space under the lifted lower ring block 4C. It is also possible to temporarily connect and lift the lower ring block 4C and the furnace bottom section ring block 4D through the variable connection tool 13.
  • a new blast furnace can be constructed in accordance with further another embodiment described below.
  • Fig. 25 shows an example of ring blocks divided into three of 4A, 4B and 4C.
  • the ring block 4A and 4B are temporarily connected by means of the variable connection tool 13.
  • the lowest furnace bottom section ring block 4C is transported through the general level adjusting frame 17 in the case that the height of the transporting truck 15 (also referred to as a unit dolly) is different from the height of the caisson in which the furnace body is fixed.
  • the furnace bottom section ring block 4C can be moved from the position of the transporting truck through the rail 18 provided on the frame to the rail 19 provided on the caisson 5 to be put in the caisson 5, as shown in Fig. 25 .
  • the rail 19 may be buried as it is or removed after the furnace bottom section ring block 4C is fixed. Further, used can be an air caster capable of moving a heavy material and fine adjustment of a location for installation instead of the rail.
  • the upper ring block 4B can be centered, aligned and fixed to the lowest furnace bottom section ring block 4C in a way of parallel movement such that the ring block 4B is pushed left and right, similarly to the above description.
  • the ring block 4B capable of parallel movement is located above the furnace bottom section ring block 4C, which is fixed only by movement. This means quick and easy centering and alignment.
  • the ring block 4A is put on the ring block 4B after the ring block 4B is centered and aligned to be fixed.
  • the ring blocks 4A and 4B and the ring blocks 4B and 4C are respectively welded and connected to each other to complete assembly of the furnace body following to the above.
  • the ring blocks 4A and 4B are temporarily connected by means of the variable connection tool 13.
  • the lift jack 3c for the ring block 4B which is shown by a dotted line in Fig. 25 , however, can be used for the purpose of securing safety.
  • carrying a lifting load mainly by the variable connection tool 13 allows adjustment of the centering by parallel movement to be achieved.
  • an operation of welding and connecting the furnace shells 7 and 8 and an operation of centering the respective ring blocks 4A to 4C located on the upper side of the furnace bottom section ring block 4D can be performed in parallel with an operation of stacking bricks at the furnace bottom in the furnace bottom section ring block 4D although it has conventionally taken long time for the former operations.
  • the operations of centering and stacking the ring blocks located on the upper side of the lower ring block 4C and the operations of welding and connecting the respective ring blocks 4C and 4D can be performed within 20 to 30 days, which have been conventionally needed for an operation of stacking the bricks at the furnace bottom in the furnace bottom section ring block 4D. This gives time to a construction period.
  • the ring block 4B can be centered and fixed onto the furnace bottom section ring block 4C just after the furnace bottom section ring block 4C is centered and fixed in the example of the ring blocks divided into three of 4A, 4B and 4C.
  • Fig. 26(a) shows an example of the variable connection tool 13, which has a parallel link structure formed from a combination of a pair of the brackets 11 and 12 and the connection member (rod) 13a.
  • Fig. 26(b) shows an example of a wire clamp device 13b using a wire as the connection member 13a.
  • Fig. 26 also shows an example of temporary connection by means of the wire clamp device in which a wire is clamped to hold the wire on the brackets 11 and 12 and a wire unit is hydraulically fixed.
  • connection of the respective ring blocks 4A and 4B by means of the various kinds of connection tool 13 including a variable connection tool is just a temporary connection (joint) only for carrying a load of the upper ring block 4B under the connected part. This requires no centering operation. Accordingly, the operations can be completed within one hour. From this point of view, the construction period can be greatly shortened, compared with the conventional case that it takes 10 to 20 hours for connection of blocks of a new furnace body.
  • the level adjusting frame 17 is provided on the transporting truck 15 to lay the rail 18 thereon, the rail 19 in the furnace, which is to be located at the level same as that of the rail 18, is provided also on the caisson 5, the truck 20 is put on the rails 18 and 19, and the respective furnace body ring blocks 4A to 4D are put on the truck 20 to carry in or out the ring blocks of the new or old furnace body as shown in Fig. 24 .
  • Performing the operations from connecting to dismantling the ring blocks of the old furnace body and the operation of carrying in and connecting the ring blocks of the new furnace body as described above allow revamping and constructing steps of a blast furnace, which include operations of carrying out and in the ring blocks of the new and old furnace bodies, to be greatly shortened in view of a construction period more than the conventional case.
  • the method of revamping and constructing a blast furnace in accordance with the present invention is applicable not only in the case of the above-mentioned ring block construction method but also as a revamping and constructing technology having the basically similar structure in another technical field.

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  • 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)
  • Working Measures On Existing Buildindgs (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP09803034.9A 2008-07-31 2009-07-24 Procédé pour construire et réparer un corps de haut-fourneau Active EP2305840B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008197927 2008-07-31
JP2009133364A JP5540568B2 (ja) 2008-07-31 2009-06-02 高炉炉体の建設および改修の方法
PCT/JP2009/063625 WO2010013793A1 (fr) 2008-07-31 2009-07-24 Procédé pour construire et réparer un corps de haut-fourneau

Publications (3)

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EP2305840A1 true EP2305840A1 (fr) 2011-04-06
EP2305840A4 EP2305840A4 (fr) 2014-04-23
EP2305840B1 EP2305840B1 (fr) 2016-03-23

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JP (1) JP5540568B2 (fr)
KR (1) KR101179806B1 (fr)
CN (1) CN102112634B (fr)
BR (1) BRPI0916610A2 (fr)
WO (1) WO2010013793A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP5739237B2 (ja) * 2011-06-02 2015-06-24 Ｊｆｅスチール株式会社 重量物の搬出方法及び搬入方法
JP6115444B2 (ja) * 2012-10-30 2017-04-19 Ｊｆｅスチール株式会社 構造物更新方法及び構造物建設方法
CN106755680B (zh) * 2017-01-12 2018-09-18 马钢集团设计研究院有限责任公司 一种中小型厚壁高炉炉壁改造方法及其结构
CN109457073A (zh) * 2018-11-16 2019-03-12 中冶天工集团有限公司 一种大容积高炉炉体离线组装推移方法
JP7163167B2 (ja) * 2018-12-19 2022-10-31 Ｊｆｅプラントエンジ株式会社 炉体の解体方法
KR102012148B1 (ko) * 2019-01-04 2019-08-19 오세현 버슬 파이프 시공 및 해체방법
KR102015752B1 (ko) * 2019-08-12 2019-08-28 오세현 버슬 파이프 시공 및 해체방법
JP7152045B2 (ja) 2020-10-29 2022-10-12 有限会社大洋産業 吊り下げ構造物の解体方法
CN113201612B (zh) * 2021-04-09 2022-07-12 北京首钢建设集团有限公司 一种高炉放残铁施工中铜冷却壁快速拆除装置及方法
CN114686625A (zh) * 2022-01-29 2022-07-01 北京首钢股份有限公司 一种高炉放残铁方法

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EP0182511A1 (fr) * 1984-10-30 1986-05-28 Davy Mckee (Stockton) Limited Procédé de construction d'un haut-fourneau
JPH09143521A (ja) * 1995-11-28 1997-06-03 Kawasaki Steel Corp 高炉の短期改修・建設方法
EP1048741A1 (fr) * 1999-04-30 2000-11-02 Kawasaki Steel Corporation Procédé et dispositif pour la rénovation rapide ou construction d'un haut fourneau

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JPH0671999B2 (ja) 1991-12-27 1994-09-14 株式会社大滝油圧 重量物の吊上げ装置
JP3157723B2 (ja) * 1996-09-03 2001-04-16 川崎製鉄株式会社 炉体リングブロックの接続方法
JP3111029B2 (ja) 1996-09-03 2000-11-20 川崎製鉄株式会社 炉体ブロックの芯合わせ方法
JP3539885B2 (ja) * 1999-03-31 2004-07-07 Ｊｆｅスチール株式会社 炉体リングブロックの移動式吊換装置及び高炉炉体解体方法並びに高炉炉体構築方法
JP2001003109A (ja) * 1999-06-18 2001-01-09 Sankyu Inc 炉体マンテルの芯合わせ方法及び装置
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EP0182511A1 (fr) * 1984-10-30 1986-05-28 Davy Mckee (Stockton) Limited Procédé de construction d'un haut-fourneau
JPH09143521A (ja) * 1995-11-28 1997-06-03 Kawasaki Steel Corp 高炉の短期改修・建設方法
EP1048741A1 (fr) * 1999-04-30 2000-11-02 Kawasaki Steel Corporation Procédé et dispositif pour la rénovation rapide ou construction d'un haut fourneau

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Also Published As

Publication number Publication date
EP2305840B1 (fr) 2016-03-23
KR101179806B1 (ko) 2012-09-04
EP2305840A4 (fr) 2014-04-23
CN102112634B (zh) 2016-03-16
JP2010053441A (ja) 2010-03-11
CN102112634A (zh) 2011-06-29
KR20110020313A (ko) 2011-03-02
BRPI0916610A2 (pt) 2015-11-10
JP5540568B2 (ja) 2014-07-02
WO2010013793A1 (fr) 2010-02-04

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