JPH11124612A - Device for assembling and disassembling blast furnace and method for assembling and disassembling thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an effective and economical assembling and disassembling device of a blast furnace which can shorten the working time and obtain the safe work. SOLUTION: This device is provided with receiving beams 27 arranged so as to pass through between supporting columns 17 of the furnace body from a casting floor part 9 to both outsides of the furnace body 2, a mantel carriage 29 travelled on the receiving beams 27, the first center hole jackes 32, 33 arranged in the furnace body scaffold 16 and load onto/off from the mantel carriage 29 by hanging up/down the partial mantel 4, the second center hole jack arranged on the furnace body scarffold 16 and supporting the whole or a part loaded to the receiving beams 27 and a tuyere movable safe roof 36 arranged so as to be travellable in the receiving beam 27. The second center hole jack can hang down/up the receiving beams 27 and the mantel carriage 29 in the vertical direction and also, can adjust the horizontal level. The tuyere movable safe roof 36 can execute safely the assembling and the disassembling works to each of the upper side space 40 and the lower side space 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace assembling and disassembling apparatus for assembling or disassembling a furnace body of a blast furnace and an assembling and disassembling method. The term "mantel" used below includes both a steel shell alone and a steel shell integrated with a stave (or stove cooler), brick and the like.

[0002]

2. Description of the Related Art Conventionally, a blast furnace assembling / disassembling apparatus or assembling / disassembling method for assembling or disassembling a furnace body of a blast furnace uses a lifting machine (generally a traveling top outrigger crane) attached to a top tower for installation. It is known to use or assemble or disassemble a furnace body.

On the other hand, a furnace body is divided into, for example, five large blocks (top mantel, upper shaft mantel, lower shaft mantel, Bosch mantel, and Haas mantel), and each block is lifted from the furnace bottom by an elevating facility provided in a furnace body turret. What is taken in (for example, Japanese Unexamined Patent Publication No. Hei 9-143521) or what is obtained by dividing a furnace body into a plurality of blocks and carrying out or carrying in each of the blocks from a working floor through a bogie using a hollow hydraulic jack provided in a furnace body tower. (For example, see JP-A-53-8
7906, JP-A-53-87907, etc.) are known.

[0004]

However, the hoisting machine (furnace outrigger crane) attached to the rooftop turret usually has a lifting capacity of about 60 to 200 tons, and the furnace body has a total weight of several thousand tons. Even when a ring-shaped mantel is divided into a ring shape in the horizontal direction, it usually has a scale of several hundred tons when the stave is attached. For this reason, the furnace body was divided into strip-shaped pieces, and assembly (installation) or disassembly was performed.
It was not economic.

On the other hand, when the furnace body is divided into five large blocks and then carried out or carried in, the weight of the blocks themselves becomes extremely large, and extremely large-scale temporary installation for lifting, hanging, etc. is required, and the area around the furnace bottom is required. Requires a lot of work space,
The blast furnace was subject to the overall structure of the blast furnace and the surrounding space, and was not a general-purpose device or method.

[0006] Further, the furnace body divided into a plurality of blocks and carried out or carried in at the operating floor level is characterized in that the operating floor level located at a level higher than the casting bed and the annular pipe near the two beds in the height direction. The gap is small and the height of each block cannot be made large, which is a limitation. In order to avoid this, it is necessary to remove the annular pipe, and a large amount of labor is required because a work for restoring the annular pipe also occurs. In addition, there is also a problem that the carrying-out or carrying-in is restricted.

[0007] The assembly and dismantling of the blast furnace furnace body were completely the same in the assembly and installation of the mantel when the blast furnace was newly installed.

An object of the present invention is to provide a blast furnace assembling and disassembling apparatus and an assembling and disassembling method capable of shortening a construction period and performing a safe operation.
It is efficient and economical.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a blast furnace assembly and disassembly apparatus for sequentially assembling or disassembling partial mantels obtained by dividing a blast furnace body into a plurality of parts in a horizontal direction. A receiving beam provided between the supporting columns of the furnace tower of the blast furnace on both sides of the furnace body from the portion, a bogie provided so as to be able to run on the receiving beam, and the partial mantel provided on the furnace tower. And first suspending means for suspending or suspending and loading or unloading the carriage.

[0010] Since the receiving beams are provided on both sides of the furnace body from the cast floor of the blast furnace through the supporting columns of the furnace body tower, there are relatively few space restrictions, and the strength is reasonably necessary and sufficient. It is possible to provide a beam having high strength. Since the cart is provided so as to be able to travel on the receiving beam, the partial mantel can be quickly transferred from the cast floor of the blast furnace to the center of the furnace body or from the center of the furnace to the cast floor. Furthermore, the first suspending means provided on the furnace tower of the blast furnace determines the number of units to be used according to the weight of the partial mantel to be handled,
Since the total capacity is determined, it is possible to provide a sufficient lifting or hanging ability, and it is possible to easily load or unload the truck. The number of divisions of the furnace body into partial mantels and the weight of the attached stave are optimally selected based on the capacity of the first suspending means and the strength of the furnace tower supporting the suspending means. Therefore, the assembly and disassembly apparatus for the blast furnace is capable of shortening the construction period and safe work, and is efficient and economical.

Further, in the assembly and disassembly apparatus for the blast furnace,
A second suspending means is provided on the furnace tower to support all or a part of the load applied to the receiving beam. The second suspending means for supporting all or a part of the load applied to the receiving beam reduces the mechanical sectional performance required for the receiving beam in addition to the operation of the assembly and disassembly device for the blast furnace.

[0012] Further, the second suspending means supports the receiving beam and the bogie while being suspended or suspended in a vertical direction, and is capable of adjusting a horizontal level. The second suspending means, in addition to the function of the second suspending means, increases the degree of freedom in lifting or suspending the partial mantel, and eliminates the need for a suspending bracket provided on the mantel.

Further, in any one of the above-mentioned disassembly and disassembly apparatus for a blast furnace, a safety ceiling provided so as to be able to run along the receiving beam is provided, and safety assembly and disassembly are respectively performed in a space above and below the safety ceiling. You can work. The safety ceiling provided so as to be able to travel along the receiving beam, in addition to the operation of any of the above-described blast furnace assembly and disassembly devices, makes the installation and removal of the safety ceiling quick and easy, and makes the blast furnace assembly and disassembly work more efficient. .

In a method of assembling and disassembling a blast furnace in which a plurality of partial mantels obtained by dividing a blast furnace furnace body in a horizontal direction are sequentially loaded and assembled or sequentially removed and dismantled, a method is provided between the cast floor portion of the blast furnace and the furnace body. A loading and unloading step of loading and unloading the partial mantel by placing the partial mantel on a carriage that travels between the supporting columns of the furnace tower, and a suspending means provided on the furnace tower of the blast furnace An assembling / disassembling step of lifting the partial mantel from the bogie to assemble a furnace body or separating the partial mantel from the furnace body and suspending the partial mantel from the bogie to disassemble the furnace body, and running along the receiving beam A bottom assembly and disassembly process of assembling or disassembling the bottom of the furnace body by attaching and detaching the safety ceiling provided in the furnace when necessary.

In the method of disassembling and disassembling a blast furnace, which includes the above-mentioned loading / unloading step, assembling / disassembling step and furnace body bottom assembling / disassembling step, there is relatively little space restriction, and the partial mantel is moved from the cast floor of the blast furnace to the furnace body. It can be quickly conveyed to the center or from the center of the furnace body to the casting bed. Further, the partial mantel of the cart can be easily lifted or suspended. Further, since the safety ceiling can be easily attached and detached, the bottom assembly or disassembly of the furnace body can be performed safely and efficiently independently of the work above the safety ceiling. Therefore, the construction period can be shortened and safe work can be performed, which is efficient and economical.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a disassembly apparatus and a disassembly method for a blast furnace according to the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 5, the same or equivalent parts are denoted by the same reference numerals.

FIG. 1 is a front view showing an embodiment of an apparatus for disassembling and assembling a blast furnace according to the present invention. The assembling and disassembling apparatus 25 for a blast furnace according to the present embodiment is configured such that the blast furnace body 2 is divided into a plurality of pieces in the horizontal direction, in this case, divided into 11 blocks, and the partial mantels 4 which have been manufactured in advance are sequentially loaded and assembled or assembled. Is divided into 11 blocks of partial mantels 4 in the horizontal direction, for example, and sequentially removed and dismantled.

Further, from the casting bed 9 of the blast furnace to both outer sides of the furnace body 2, a receiving beam 27 provided between the supporting columns 17 of the furnace tower and a mantel movably provided on the receiving beam 27. A trolley (trolley) 29 and a furnace top tower 16 of a blast furnace are provided separately from the furnace top outrigger crane, and a first suspending means for lifting or suspending the partial mantel 4 and loading or unloading it on the mantel trolley 29 is provided as a first suspending means. Center hole jacks 32 and 33 are provided.

Further, the assembling and disassembling apparatus 25 is provided in the furnace tower 16 and has a second center hole jack as a second suspending means for supporting all or a part of the load applied to the receiving beam 27. Although not shown in FIG. 1, the second center hole jack is appropriately installed at a necessary place, for example, 3
It is provided on the floor 22, the second floor 21, the eight floor 23, and the like. In this case, the second center hole jack supports the receiving beam 27 and the mantel trolley 29 by being lifted or suspended in the vertical direction, and is capable of adjusting the horizontal level. When the receiving beam 27 is divided into the inside and outside of the furnace tower 16 and all or a part of the load applied to the receiving beam 27 inside the furnace tower 16 is supported by the second suspension means, Needless to say, the capacity of the suspending means becomes smaller as compared with the case where the whole receiving beam 27 is supported, and it is more economical.

The first and second center hole jacks each have a tension bar which moves up and down by hydraulic pressure on a center axis. The lifting capacity or hanging capacity per unit is, for example, 200 tons. In addition, a hydraulic pump unit, an electric control device, and the like are provided, and a known pump can be used. Hydraulic pump units, electric control devices, etc. control the vertical movement speed and movement amount of multiple center hole jacks, and by providing multiple center hole jacks, the total capacity is several hundred tons, for example, steel shell and stave If the partial mantel having the weight of 500 tons is used, three to four center hole jacks will be used.

FIG. 2 is a sectional view taken along the line II of FIG. The assembling and disassembling apparatus 25 of the blast furnace has a tuyere movable safety ceiling (safety ceiling) 36 provided so as to be able to travel along the receiving beam 27, and an upper space 40 and a lower space of the tuyere movable safety ceiling 36. At 41, assembly and disassembly operations can be performed safely. Mantel cart 29 with partial mantel 4 placed
Is formed so as to be able to run on the upper surface of the upper flange 28a of the receiving beam 27, is provided with a chill tank 30 having a plurality of rolling rollers, and runs on the upper surface of the receiving beam 27. FIG. 2 illustrates an embodiment in which the partial mantel 4 is mounted on the carriage girder 42 of the mantel carriage 29 and transported. On the other hand, each of the divided mantel carts 29 is arranged on the two receiving beams 27 and can be driven by the chill tank 30, and the brackets attached to the partial mantels 4 are attached to the two mantel carts 29. A device for supporting and mounting the partial mantel 4 via the interface and transporting it is also one of the present embodiments. In this device, it is possible to eliminate the trolley girder 42 for mounting on the mantel trolley 29 shown in FIG.
The space between the lower end of the annular pipe 14 and the upper surface of the receiving beam 27 can be used more effectively. It is to be noted that the mantel cart 29 does not use the chill tank 30 but uses a known slide bearing, and is a traveling device that can be slid on the receiving beam 27. The receiving beam 27 is installed on the cast floor 11 through a plurality of receiving seats 13, and cantilevered on the cast floor 11 or, if necessary, attaches the front side 27 a (FIG. 1) of the receiving beam 27 to a horizontal beam (not shown). It is supported on the furnace body support 17 via.

Further, the tuyere movable safety ceiling 36 is
A chill tank 37 (wheel) having the same structure as the chill tank 30 is mounted on a rail installed on the inner surface of the lower flange 28b.
Rolls and runs. A split beam 38 is provided below the tuyere movable safety ceiling 36, and is used for work inside the Haasmantel 4d. The entire mantel trolley 29 on which the receiving beam 27 and the partial mantel 4 are placed is lifted via the wire 35 by the second center hole jack described above, in which all or part of the load is applied.

The blast furnace assembly and disassembly apparatus 25 according to the present embodiment having the above structure operates as follows. That is, the receiving beam 27 passes between the support columns 17 of the furnace tower and the cast floor 9 of the blast furnace.
And the receiving seat 13 of the receiving beam can be lowered, so that the gap in the height direction between the level of the cast floor upper surface 12 and the annular pipe 14 is set higher than the casting floor 11 on the operating floor. Compared with the case where the mantel trolley 29 is provided, and there is relatively little space restriction. Further, the number of divisions of the furnace body 2 into the partial mantels 4 can be reduced, and the receiving beam 27 having necessary and sufficient strength can be provided without difficulty in strength. The mantel trolley 29 is
7 so that it can run on
Can be quickly conveyed from the cast floor 9 of the blast furnace to the furnace center 3 or from the furnace center 3 to the cast floor 9.

The provision of the receiving beam 27 using the cast floor section 9 can be carried out from the mantel cart 29 of the partial mantel 4 to the ground level (GL) or the ground level (G).
L) is also convenient to carry into the mantel trolley 29.
In addition, the temporary crane 10 of the cast floor 9
Can also be used.

Further, a first blast furnace provided in a furnace tower 16 of the blast furnace is provided.
The center hole jacks 32, 33 determine the number of units to be used in accordance with the weight of the partial mantel 4 to be handled, and determine the total capacity, so that the lifting capacity or the suspending capacity can be sufficiently provided, and the mantel truck can be easily manufactured. 29 can be loaded or unloaded. Therefore, the assembling and disassembling apparatus 25 of the blast furnace is capable of shortening the construction period and safe work, and is efficient and economical.

Further, the second center hole jack for supporting all or a part of the load applied to the receiving beam 27 is
7 is reduced, the mechanical cross-sectional performance required for the receiving beam 27 is reduced, and the degree of freedom of lifting or hanging the partial mantel 4 is increased, so that a lifting or hanging bracket is not required. I do. In addition, the tuyere movable safety ceiling 36 provided so as to be able to travel along the receiving beam 27 makes the work of attaching and detaching the safety ceiling quick and easy, and makes the assembly and dismantling work of the blast furnace more efficient. Then, the assembling and disassembling operations can be safely performed in the upper space 40 and the lower space 41 of the safety ceiling.

Next, a method of assembling and disassembling a blast furnace according to the present embodiment will be described with reference to FIGS.

First, referring to FIGS. 1 and 2, a method for assembling and disassembling a blast furnace according to the present embodiment is such that a ring-shaped partial mantel 4 obtained by dividing a blast furnace body 2 into a plurality of parts in the horizontal direction is sequentially loaded and assembled or sequentially unloaded. It is a method of dismantling. That is, the partial mantel 4 is placed on a mantel truck 29 that travels between the support pillars 17 of the furnace body on a receiving beam 27 provided between the cast floor portion 9 of the blast furnace and the furnace body 2, and is carried in or out. A loading / unloading process for unloading, and a first as a suspending means provided on the furnace body tower 16 of the blast furnace.
Assembling and disassembling step of assembling the furnace body 2 by lifting the partial mantel 4 from the mantel trolley 29 by the center hole jacks 32 and 33 or separating the partial mantel 4 from the furnace body and suspending the partial mantel 4 on the mantel trolley 29 to disassemble the furnace body 2 And a bottom assembly / disassembly process of assembling or disassembling the bottom of the furnace body by attaching and detaching the tuyere movable safety ceiling 36 provided so as to be able to travel along the receiving beam 27 when necessary.

FIGS. 3A and 3B show disassembly and disassembly by the assembly and disassembly apparatus for a blast furnace according to the present invention, wherein FIG. 3A is a front view of removing the tuyere mantel, and FIG. As shown in FIG. 3A, first, the furnace body 2 is supported on a furnace body tower via a double ring girder 18. In this state, the tuyere mantel 4e is cut into pieces, and the overhead crane 10
To move to the cast floor section 9 and carry it out. The cut lower end level of the tuyere mantel 4e is determined so as to provide a space between the upper end of the receiving beam 27 and the lower end of the annular pipe 14 so that the subsequent partial mantel 4 can be easily disassembled and installed. I have. After removing the tuyere mantel 4e, as shown in FIG. 3B, a receiving beam 27 is laid on the cast floor 11, and the mantel truck 2
9 is installed so that it can run. At this time, the tuyere movable safety ceiling 36 is movably installed on the receiving beam 27.

In the upper space 40 of the tuyere movable safety ceiling 36, a ring-shaped partial mantel 4 having a predetermined height is cut substantially horizontally from the lower end side of the furnace body 2. At this time,
In order to support the cut-out partial mantel 4, it is suspended so as to be balanced by a plurality of first center hole jacks 32 provided on a lower deck frame (commonly called three floor level) of the furnace tower. The cut partial mantel 4 is placed on a mantel cart 29 and transferred to the cast floor 9 along the receiving beam 27. The partial mantel 4 transferred to the cast floor section 9 is carried out by a crane (not shown).

At the same time, the top mantel 4a such as a gas collecting mantel at the upper part of the furnace body is dismantled by the outrigger crane 20. In the lower space 41 of the tuyere movable safety ceiling 36, the operation of processing the remaining pig iron is performed at the same time. The furnace body is dismantled by the above operation.

FIG. 4 shows an assembly disassembly similar to FIG.
(C) Top mantel-shaft mantel pulling in tank,
FIG. 3D is a front view of the lifting and assembly, and FIG. As shown in FIG. 4C, a partial mantel manufactured in advance outside, that is, a top mantel 4a such as a gas collecting mantel, a shaft mantel not shown, and the like are:
It is conveyed to the cast floor section 9 by a known heavy object transporting trolley not shown, and is mounted on the mantel trolley 29 by a crane not shown. The mantel trolley 29 on which the partial mantel 4 is placed is transferred to the furnace body center 3 side. The transferred partial mantel 4 is lifted and assembled by, for example, a first center hole jack 33 installed on the eight floor 23 of the furnace tower.

As shown in FIG. 4D, the hearth mantel 4d is drawn into the cast floor 9 like the top mantel and the shaft mantel, and is placed on the mantel cart 29. Further, the hearth mantel 4d is transferred to the furnace body center 3 by the mantel cart 29. The Haas mantel 4d transferred is lifted by, for example, a first center hole jack 32 installed on the three floors of the furnace tower, and after the mantel cart 29 is returned to the cast floor section 9 side, the hearth mantel 4d is moved to the furnace bottom 24. Installed.

FIG. 5 shows an assembly disassembly similar to FIG.
(E) is a front view of temporary installation on a three-floor girder, and (F) is a front view of Bosch mantel installation. As shown in FIG.
The top mantel 4a, the shaft mantel 4b, and the like are supported by four to eight hydraulic jacks (not shown) placed on the three-floor girder via the bracket 6, and are temporarily placed on the three-floor girder. Next, as shown in FIG. 5 (F), the Bosch mantel 4c is pulled in, transferred to the furnace body center portion 3, and connected to the lower end of the shaft mantel 4b. Further, the tuyere mantel is taken in while adjusting the level of the upper mantel temporarily placed by the hydraulic jack of the three-bed girders, and the upper end and the lower end are connected to the Bosch mantel 4c and the hearth mantel 4d, respectively. The body assembly is completed.

The method of assembling and disassembling the blast furnace according to the present embodiment includes a carry-in / out step, an assembling / disassembling step, and a furnace body bottom assembling / disassembling step. It can be conveyed promptly from the cast bed section 9 to the furnace body center section 3 or from the furnace body center section 3 to the cast bed section 9. Further, the partial mantel 4 of the cart can be easily lifted or hung. Furthermore, since the safety ceiling 36 can be easily attached and detached, the bottom assembly or disassembly of the furnace body can be performed safely and efficiently independently of the work above the safety ceiling 36. It is to be noted that, even when a part of the mantel is left as it is, it can be easily implemented by adjusting a part of the procedure. Therefore, the construction period can be shortened and safe work can be performed, which is efficient and economical.

[0036]

According to the apparatus and method for assembling and disassembling a blast furnace of the present invention, the construction period can be shortened and safe operation can be performed, and it is efficient and economical.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an assembly and disassembly apparatus for a blast furnace according to the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

3A and 3B show disassembly and disassembly by a disassembly and disassembly apparatus for a blast furnace according to the present invention, wherein FIG.
FIG. 2 is a front view of the furnace body dismantling.

4A and 4B show a disassembled disassembly similar to that of FIG. 3, wherein FIG. 4C is a front view of drawing, lifting and assembling from the top mantel to the shaft mantel, and FIG. 4D is a front view of installation of the Haasmantel.

FIG. 5 shows the same disassembly and disassembly as in FIG. 3, wherein (E) is a front view of a temporary placement on a three-beam girder, and (F) is a front view of Bosch mantel installation.

[Explanation of symbols]

2 Furnace body 4 Partial mantel 9 Cast floor part 16 Furnace body tower 17 Support pillar 25 Blast furnace assembling and disassembling device 27 Receiving beam 29 Mantel trolley (trolley) 32, 33 First center hole jack (first suspension means) 36 blades Mouth movable safety ceiling (safety ceiling) 40 Upper space 41 Lower space

Claims (5)

[Claims] A blast furnace assembly dismantling apparatus for sequentially assembling or disassembling partial mantels obtained by dividing a blast furnace furnace body into a plurality of parts in a horizontal direction, comprising: A support beam provided between the support columns,
A bogie provided so as to be able to run on the receiving beam, and a first suspending means provided on the furnace body tower for lifting or suspending the partial mantel and loading or unloading the bogie. Blast furnace assembly and disassembly equipment. 2. The blast furnace assembly and disassembly apparatus according to claim 1, further comprising a second suspending means provided on the furnace body tower to support all or a part of the load applied to the receiving beam. . 3. The apparatus according to claim 2, wherein the second suspending means supports the receiving beam and the bogie by lifting or suspending the same in a vertical direction, and is capable of adjusting a horizontal level. Blast furnace assembly and disassembly equipment. 4. A safety ceiling according to claim 1, further comprising a safety ceiling provided so as to be able to run along said receiving beam.
A disassembly and disassembly apparatus for a blast furnace, wherein assembly and disassembly operations can be performed safely in a space above and below the safety ceiling. 5. A method of assembling and disassembling a blast furnace in which partial mantels obtained by dividing a blast furnace furnace body into a plurality of parts in a horizontal direction are sequentially loaded and assembled or sequentially unloaded and dismantled, provided between the cast floor portion of the blast furnace and the furnace body. A loading / unloading step of loading and unloading the partial mantel by placing the partial mantel on a carriage traveling between the supporting columns of the furnace body on the received receiving beam, and a suspending means provided on the furnace tower of the blast furnace. Assembling the furnace body by lifting the partial mantel from the bogie or disassembling the furnace body by separating the partial mantel from the furnace body and suspending the partial mantel from the bogie, so that the furnace can run along the receiving beam; A furnace bottom assembly dismantling step of attaching and detaching the provided safety ceiling when necessary to assemble or disassemble the furnace bottom.