JP4085294B2 - Blast furnace assembly and disassembly equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blast furnace assembly / disassembly apparatus and assembly / disassembly method for assembling or dismantling a blast furnace furnace body. In addition, the “Mantel” described below includes both an iron skin only and an iron core in which a stave (or stave cooler) or a brick is integrated.
[0002]
[Prior art]
Conventionally, a blast furnace assembling / disassembling apparatus or disassembling method for assembling or disassembling a furnace body of a blast furnace uses a lifting machine (generally a traveling furnace top outrigger crane) attached to the furnace top for installation. Those that assemble or disassemble the body are known.
[0003]
On the other hand, there is one in which the 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 taken in from the furnace bottom.
[0004]
[Problems to be solved by the invention]
However, the lifting machine usually has a lifting capacity of about 60 to 200 tons, the furnace body has a total weight of several thousand tons, and even a ring-shaped mantel divided into a ring shape in the horizontal direction has a few hundred tons when the stave is attached. It is usually scale. For this reason, the furnace body is divided into strip-shaped pieces and assembled (installed) or disassembled. The furnace body can also be divided into rings, but in this case, pre-installation of the stave (lining part) is not possible due to its increased weight, and the stave must be removed before disassembly. Is necessary, and has become a bottleneck in shortening the construction period. The same was true for mantel assembly and installation when the blast furnace was newly installed.
[0005]
On the other hand, what divides the furnace body described above into five large blocks requires a large capacity lifting mechanism and an extremely large temporary construction, and requires a large work space around the bottom of the furnace. It is not a general-purpose device or method because it is subject to spatial constraints around it.
[0006]
An object of the present invention is to reduce the work period in an assembly / disassembly apparatus for a blast furnace, and to be efficient and economical.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides an assembly / disassembly apparatus for a blast furnace that sequentially assembles or disassembles partial mantels obtained by dividing a blast furnace furnace body into a plurality of parts in a horizontal direction, and a casting provided at a height near the tuyere of the blast furnace. Cast floor receiving beam provided from the floor to the front of the furnace body, a carriage on which the partial mantel is provided so as to be able to run on the cast floor receiving beam and to be carried in or out, and a furnace core intermediate deck of the blast furnace A deck receiving beam provided on both outer sides of the furnace body, a center hole jack provided on the deck receiving beam to lift or suspend the partial mantel to be loaded or unloaded, and the portion to be loaded or unloaded And a horizontal pulling means for horizontal pulling of the mantel.
[0008]
At the time of assembling the blast furnace, the carriage is formed so as to be able to travel on the cast-beam receiving beam, so that the partial mantel placed on the carriage is easily carried to the front surface of the furnace body. The partial mantel carried to the front of the furnace body is initially suspended obliquely upward by a center hole jack provided on the deck receiving beam. While the center hole jack of the deck receiving beam is gradually moved to the furnace body center side to adjust the height, at the same time, the partial mantel is laterally pulled from the cast floor part to the furnace body center side by the horizontal pulling means. When the partial mantel comes to the center of the furnace body, the partial mantel is suspended in the vertical direction. From this state, it is possible to connect and assemble the partial mantel to the already assembled furnace body by lifting the partial mantel with the center hole jack .
[0009]
At the time of dismantling the blast furnace, the partial mantel to be removed separated from the furnace body is suspended vertically to the cast floor level by a center hole jack . From this state, one end of the partial mantel is placed on a carriage formed so as to be able to travel on the cast-in-place support beam by being horizontally pulled from the furnace body center side to the cast-in floor by the horizontal pulling means. Further, the partial mantel is placed on the carriage by lateral pulling, and is moved to the casting floor by the carriage and carried out. As described above, the assembly / disassembly apparatus for a blast furnace according to the present invention is economically carried in or out efficiently by a simple apparatus, shortening the work period, and economical.
[0010]
Furthermore, in the blast furnace assembling and disassembling apparatus, a safety ceiling that can move in the horizontal direction from the cast floor receiving beam to the center of the furnace body can be provided. In this case, the upper and lower spaces of the safety ceiling can be assembled and disassembled safely at the same time or independently. In addition to the action of the blast furnace assembling and disassembling apparatus, the safety ceiling that can be moved in the horizontal direction makes it possible to quickly and easily attach and detach the safety ceiling and at the same time safely and simultaneously in the upper space and the lower space of the safety ceiling, or Assembling or dismantling work can be done independently, and the assembly and dismantling work of the blast furnace is made efficient.
[0012]
While hanging the partial mantel to be carried in or out, the partial mantel can be easily and easily transported by pulling it from the blast furnace cast floor to the furnace center or from the furnace center to the cast floor. It is possible to shorten the construction period, and it is efficient and economical.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an assembly / disassembly apparatus and assembly / disassembly method for a blast furnace according to the present invention will be described below in detail with reference to the drawings. 1 to 4, the same or equivalent parts are denoted by the same reference numerals.
[0014]
FIG. 1 is a front view showing an embodiment of a blast furnace assembly / disassembly apparatus according to the present invention. The blast furnace assembly / disassembly apparatus 25 according to the present embodiment is configured to sequentially carry in and assemble the partial mantel 4 that has been manufactured in advance by dividing the blast furnace body 2 into a plurality of, for example, 10 blocks in the horizontal direction, or an existing blast furnace furnace. The body 2 is divided into 10 blocks of partial mantels 4 in the horizontal direction in advance and sequentially separated and disassembled.
[0015]
Further, the blast furnace assembly / disassembly apparatus 25 is capable of traveling on the cast-in-place support beam 27 provided from the cast-floor portion 9 of the blast furnace to the front surface of the furnace body 2, preferably up to the front surface of the furnace body 2, and the cast-in-place support beam 27. A mantel carriage (carriage of claim 1) 29 on which the partial mantel 4 to be loaded or unloaded is mounted, and a deck provided on the intermediate deck 20 of the furnace shell 16 of the blast furnace and spanned on both outer sides of the furnace body 2 A receiving beam 31, a center hole jack 32 as lifting means for lifting or hanging the partial mantel 4 to be loaded or unloaded provided on the deck receiving beam 31, and a horizontal pulling means for horizontally pulling the partial mantel to be loaded or unloaded 36.
[0016]
The blast furnace assembling / disassembling apparatus 25 can also include a tuyere movable safety ceiling (safety ceiling) 39 that is movable in the horizontal direction over the central part 3 of the furnace body. The lower space 42 can be assembled and disassembled safely and simultaneously or independently.
[0017]
Here, the horizontal pulling means 36 is provided on the side of the support pillar 17 of the furnace body rod, and is provided near the other end of the winder 37a or the casting bed receiving beam 27 that winds the wire 38a fixed to the partial mantel 4. The wire 38b fixed to the partial mantel 4 is wound up by a winder 37b and wound horizontally.
[0018]
FIG. 2 is a sectional view taken along the line II of FIG. The deck receiving beams 31 are passed between the intermediate deck 20a and the intermediate deck 20b on both outer sides of the furnace body shown as the shaft mantel 4b, and each deck receiving beam 31 hangs two I beams as a set. Has been passed. A pair of deck receiving beams 31 and 31 provided on the side of the intermediate deck 20c and the intermediate deck 20d are spanned at intervals at which the shaft mantel 4b shown at the center of the furnace shell 16 enters inside. Since the Bosch Mantel (furnace mantel) 4c shown in the same location is arranged below the deck receiving beam 31, it may be smaller than the outer diameter of the Bosch Mantel 4c. Further, in the case of this embodiment, a total of six center hole jacks 32 are provided for each of the deck receiving beams 31.
[0019]
FIG. 3 is a sectional view taken along the line II-II in FIG. Of the deck receiving beams 31 of one set of two I beams, one I beam is placed on the intermediate deck 20d, and the other I beam is passed over the intermediate deck 20a and the intermediate deck 20b. Further, the center hole jack 32 is provided so as to be able to travel via a chill tank 33 having a plurality of rolling rollers on the upper flanges of the two I beams 31 a forming the deck receiving beam 31.
[0020]
Further, the load applied to the following tension bar due to lateral pulling can be alleviated if the support base of the center hole jack 32 and the center hole jack 32 are connected and supported via a spherical seat or a trunnion. Here, the center hole jack 32 has a tension bar that moves up and down by hydraulic pressure as a central axis, and a wire 35 is connected to the tension bar to lift or suspend heavy objects. Alternatively, the suspension capacity is, for example, 200 tons, and in addition to the center hole jack, a hydraulic pump unit, an electric control device, and the like can be used, and known ones can be used. The hydraulic pump unit, the electric control device, etc. control the vertical movement speed and the movement amount of the plurality of center hole jacks 32, and by providing a plurality of center hole jacks 32, the total capacity becomes several hundred tons. If the partial mantel having a stave has a weight of 500 tons, at least 3 to 4 center hole jacks 32 are used.
[0021]
4 is a cross-sectional view taken along the line III-III in FIG. The mantel carriage 29 on which the partial mantel 4 is mounted is formed so as to be able to travel on the upper surface of the upper flange 28a of the cast-in beam receiving beam 27, and travels on the upper surface of the cast-in beam receiving beam 27 via a chill tank 30 having a plurality of rolling rollers. However, it is possible to move to the front surface of the furnace body 2. The cast floor receiving beam 27 is installed on the cast floor 11 via a plurality of receiving seats 13. Further, since the pair of cast floor receiving beams 27 on the left and right are temporarily stopped up to the front surface of the furnace body 2, the interval between the cast floor receiving beams 27 can be reduced. Along with this, the mantel cart can be downsized.
[0022]
As shown in FIGS. 1 and 4, the tuyere movable safety ceiling 39 according to the present embodiment is arranged on the rail installed on the inner surface of the lower flange 28 b of the cast-in support beam 27 up to the front surface of the furnace body 2. The vehicle travels through the chill tank 40 having the same structure as the chill tank 30, but when traveling further to the furnace body 2, it can be moved in the horizontal direction on a receiving beam other than the casting bed receiving beam 27 toward the furnace body center 3. It is. A shunting beam 43 is provided below the tuyere movable safety ceiling 39, and is used for work in the Hearthmantel 4d. When the distance between the pair of cast floor receiving beams 27 is temporarily set smaller than that of the furnace body 2, another receiving beam for traveling the tuyere movable safety ceiling 39 has a width (outer diameter) of the furnace body 2. It is provided between the casting floor portion 9 and the furnace body 2 at a larger interval.
[0023]
The blast furnace assembly / disassembly apparatus 25 of the present embodiment having the above-described structure operates as follows. That is, in FIG. 1, when assembling the blast furnace, a partial mantel manufactured in a ring shape in advance is transported to the casting floor 9 by a known heavy material transport vehicle or the like, and the mantel carriage is transported by a heavy material lifting machine (not shown). 29. Since the mantel carriage 29 can travel on the cast-in-place receiving beam 27, the partial mantel 4 placed on the mantel carriage 29 is carried to the front surface of the furnace body. The partial mantel 4 carried to the front of the furnace body is initially suspended obliquely upward by the wire 35 by the center hole jack 32 provided on the deck receiving beam 31. Then, the center hole jack 32 is gradually moved in the direction of the arrow 44 to adjust the level, and at the same time, the partial mantel 4 is wound around the wire 38a by the winder 37a so that the center part 3 of the furnace body 3 is cast from the cast floor part 9. It is pulled sideways. When the partial mantel 4 comes to the furnace body central part 3, the partial mantel 4 is suspended in the vertical direction. From this state, by lifting the partial mantel 4 by the center hole jack 32, the partial mantel 4 can be connected and assembled to the furnace body that has already been partially assembled.
[0024]
At the time of dismantling the blast furnace, the partial mantel separated from the furnace body and suspended is vertically suspended by the center hole jack 32 to the cast floor level. Then, the center hole jack 32 is gradually moved in the direction opposite to the arrow 44 to adjust the level, and the wire 38b is wound up by the winder 37b and laterally drawn from the furnace body center 3 side to the cast floor 9. As a result, one end of the partial mantel 4 is placed on the mantel carriage 29 that can travel on the cast-in beam receiving beam 27. Furthermore, the partial mantel 4 is placed on the mantel carriage 29 by lateral pulling, and is moved to the casting floor portion 9 by the mantel carriage 29 and is carried out by the above-described heavy lifting machine, heavy goods transporting vehicle, etc. The old mantel is removed outside. Thus, according to the blast furnace assembly / disassembly apparatus 25 of the present invention, the partial mantel can be efficiently carried in or out by a simple apparatus, and the construction period can be shortened, which is economical. Further, as described above, the pair of receiving beams 27 on the left and right sides is temporarily stopped up to the front surface of the furnace body 2, so that the interval between the receiving beams 27 can be reduced and the mantel carriage 29 can be downsized. You can also
[0025]
Further, the attaching and detaching work of the tuyere movable safety ceiling 39 movable in the horizontal direction is performed quickly and easily, and the upper space 41 and the lower space 42 of the safety ceiling can be safely assembled or disassembled safely or separately. Can improve the efficiency of assembly and dismantling of the blast furnace.
[0026]
It should be noted that the partial mantel 4 can be appropriately used for lifting or hanging the center hole jack 34 provided on the eighth floor 21 of the furnace body or on another floor.
[0027]
When the blast furnace is newly installed, the partial mantel can be installed in exactly the same way as when assembling and dismantling.
[0028]
Next, a method for assembling and disassembling a blast furnace according to the present embodiment will be described with reference to FIGS.
[0029]
The blast furnace assembly / disassembly method of the present embodiment is a blast furnace assembly / disassembly method in which partial mantels 4 obtained by dividing a blast furnace furnace body into a plurality of parts in the horizontal direction are sequentially loaded and assembled, or sequentially carried out and disassembled. While suspending the mantel 4, the center mantle 4 is assembled by pulling it from the blast furnace casting floor portion 9 to the furnace body central portion 3 and assembling the partial mantel 4, or hanging the mantle 4 to be unloaded separated from the furnace body. It is to draw the blast furnace from the part 3 to the cast floor part 9 and dismantle the blast furnace.
[0030]
While hanging the partial mantel 4 to be loaded or unloaded, it is easily and easily transported by being pulled horizontally from the blast furnace casting bed part 9 to the furnace body center part 3 or from the furnace body center part 3 to the casting bed part 9. The partial mantel 4 can be transported, the work period can be shortened, and it is efficient and economical.
[0031]
【The invention's effect】
According to the assembly / disassembly apparatus and assembly / disassembly method for a blast furnace according to the present invention, the work period can be shortened, and it is efficient and economical.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an assembly / disassembly apparatus for a blast furnace according to the present invention.
FIG. 2 is a cross-sectional view taken along the line II of FIG.
3 is a sectional view taken along the line II-II in FIG.
4 is a sectional view taken along line III-III in FIG.
[Explanation of symbols]
2 Furnace body 3 Center part 4 Partial mantel 9 Cast floor part 16 Furnace pit 20, 20a-20d Intermediate deck 25 Blast furnace assembly and disassembly device 27 Cast floor receiver 29 Mantel carriage (cart)
31 Deck support 32 Center hole jack (suspending means)
36 Horizontal pulling means

Claims (2)

In a blast furnace assembly / disassembly device for sequentially assembling or disassembling partial mantels obtained by dividing a blast furnace furnace body into a plurality of parts in the horizontal direction, the blast furnace furnace body is provided from the cast floor portion provided at a height near the tuyere of the blast furnace to the front surface of the furnace body. A cast floor receiving beam, a carriage provided on the cast floor receiving beam, on which a partial mantel to be carried in or out is placed, and a furnace deck intermediate deck of the blast furnace provided on both outer sides of the furnace body A passed deck receiving beam, a center hole jack provided on the deck receiving beam to lift or suspend the partial mantel to be loaded or unloaded, and a horizontal pulling means for horizontally pulling the partial mantel to be loaded or unloaded. An assembly / disassembly device for a blast furnace, comprising: The blast furnace assembling and disassembling apparatus according to claim 1, wherein a safety ceiling is provided so as to be movable in a horizontal direction from the cast floor part to the center part of the furnace body and partitioning the upper space and the lower space of the blast furnace. An assembly / disassembly device for a blast furnace, comprising:

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