JP2017150032A - Method for dismantling hot-blast stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for dismantling a hot-blast stove, by which working can be simplified, and a work period can be shortened, even for a hot-blast stove in which a combustion chamber is not disposed in a furnace body of a regenerator, such as an external-combustion hot-blast stove or a top-combustion hot-blast stove.SOLUTION: The method for dismantling a hot-blast stove, which is applied to a hot-blast stove including a brick stack 13 formed by stacking a large number of checker bricks in a furnace body 11 of a regenerator 10, and in which the brick stack 13 is dismantled and carried out of the furnace body 11, includes: an advance dismantlement step of digging through the checker bricks from part of a top face of the brick stack 13 to form a chute 36 that extends to the lower portion of the furnace body 11 and forming a discharge port 37 communicating with the chute 36 in the lower portion of the furnace body 11; and a remainder dismantlement step of cutting and bringing down the remainder of the brick stack 13, dropping the remainder on the chute 36, and carrying the remainder out of the discharge port 37.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a method for disassembling a hot stove, and more particularly to a dismantling method for an external combustion type hot stove or a top combustion type hot stove in which a combustion chamber is not provided in the regenerator chamber.

Conventionally, a hot stove has been used to supply a high-temperature gas to a blast furnace or the like.
The hot stove includes a combustion chamber that generates high-temperature gas by combustion and a heat storage chamber that accumulates heat of the generated high-temperature gas.
The heat storage chamber is configured by stacking a large number of checker bricks in the furnace body, and when generating a high-temperature gas, the heat storage chamber stores heat by passing the high-temperature gas from the combustion chamber. On the other hand, when supplying a high-temperature gas, the outside air is heated by passing the outside air through the checker brick, and is supplied as a high-temperature gas to a blast furnace or the like.

The combustion chamber is installed in various forms with respect to the heat storage chamber.
In the internal combustion hot stove, a combustion chamber is provided in the furnace body of the heat storage chamber. That is, checker bricks constituting the heat storage chamber are stacked in the furnace body, and a chimney-like space communicating vertically is formed in a part of the planar shape. And this space is utilized as a combustion chamber by installing a burner at the bottom of this space.

In the external combustion type hot stove, the furnace body of the combustion chamber is installed adjacent to the furnace body of the heat storage chamber. And each furnace top is connected and the high temperature gas from a combustion chamber is supplied to a thermal storage chamber.
In the furnace top combustion type hot stove, a burner is installed outside the furnace top part of the furnace body of the heat storage chamber. And the hot gas from a burner is supplied to the furnace top of a thermal storage chamber.
In these external combustion type hot air furnaces and furnace top combustion type hot air furnaces, checker bricks are installed on the entire planar shape in the furnace body of the heat storage chamber. That is, there is no chimney-like space without checker bricks like the internal combustion hot stove.

In the various types of hot stoves described above, the checker bricks in the heat storage chamber deteriorate as the operation proceeds regardless of the type. For this reason, it is necessary to update the checker brick. Specifically, the checker bricks loaded in the furnace are carried out of the furnace, and new checker bricks are stacked in the furnace.
For this reason, various dismantling methods have been proposed.

Patent Document 1 proposes a dismantling method for an external combustion type hot stove.
In Patent Document 1, a carry-out duct is installed along the outer periphery of the furnace body of the heat storage chamber, a carry-out opening is formed at each height of the furnace body, and each is communicated with the carry-out duct. Then, the checker bricks are disassembled sequentially from above in the furnace, and carried out from the nearest opening to the duct.

Patent Document 2 proposes a dismantling method for an internal combustion type hot stove.
In Patent Document 2, the combustion chamber provided in the furnace body of the heat storage chamber is used as a carry-out duct. That is, the checker bricks are sequentially disassembled from above in the heat storage chamber portion in the furnace body, and the disassembled checker bricks are dropped into the combustion chamber and carried out from the bottom of the furnace.

Japanese Patent Laid-Open No. 57-120605 JP 2003-34812 A

The dismantling method of Patent Document 1 described above can be used not only for disassembling an external combustion type hot stove but also for disassembling a top combustion type hot stove. However, in the work, it is necessary to install a carry-out duct and a carry-out opening in the furnace body of the regenerative furnace, and there are problems of complicated work adjustment and a long construction period.
On the other hand, in the dismantling method of Patent Document 2 described above, it is not necessary to install a carry-out duct or a carry-out opening, which simplifies the work and shortens the work period. However, the dismantling method of Patent Document 2 can be applied only to an internal combustion hot stove in which a combustion chamber is provided in the furnace body of the heat storage chamber.
For this reason, in a hot stove where a combustion chamber is not provided in the furnace body of the heat storage chamber, such as an external combustion type hot stove or a top combustion type hot stove, there is a dismantling method that can simplify the work and shorten the construction period. It was requested.

  An object of the present invention is to provide a hot stove that can simplify the work and shorten the construction period even in a hot stove where a combustion chamber is not provided in the furnace body of a heat storage chamber, such as an external combustion hot stove and a top combustion hot stove. It is to provide a dismantling method.

  The method for disassembling a hot stove according to the present invention is applied to a hot stove having a brick laminate formed by stacking a large number of checker bricks inside a furnace body of a heat storage chamber, dismantling the brick laminate and disposing the furnace body. A dismantling method for a hot stove that is carried out to the outside of the brick stack, digging up the checker brick at a part of the upper surface of the brick laminate, forming a chute portion that extends to a lower portion of the furnace body, and a lower portion of the furnace body A pre-disassembly step of forming a discharge port communicating with the chute portion, and a remaining portion disassembly step of cutting out the remaining portion of the brick laminate and dropping it onto the chute portion and carrying it out from the discharge port. It is characterized by.

In such this invention, a chute | shoot part is formed in a brick laminated body by a prior | preceding dismantling process, and the checker brick which disassembled the brick laminated body can be efficiently carried out using a chute | shoot part at a remaining dismantling process.
For this reason, checker bricks can be carried out through the inside of the furnace body in the external combustion type hot air furnace and the top combustion type hot air furnace, and it is not necessary to install a duct for carrying out outside the furnace body, simplifying the work. And the construction period can be shortened.
In the preceding dismantling process, checker bricks taken out by digging down the chute part are separately carried out from the furnace top side, but by appropriately setting a section to be a chute part (a section set to a planar shape on the upper surface of the brick laminate) Further, it is possible to minimize the amount of bricks to be carried out separately and to increase the ratio of efficient carrying out by the remaining part dismantling process.

  In the method for disassembling a hot stove according to the present invention, in the preceding dismantling step, it is desirable to install a support for preventing collapse or peeling on the inner wall of the chute.

The inner wall of the chute is in a rough state due to the fact that some bricks are crushed in the middle for the convenience of being formed by digging up the checker bricks that make up the brick laminate, and collapse and peeling may occur is there.
However, in the present invention, the support member can prevent the inner surface of the chute from collapsing and peeling off, and a stable chute can be formed. Moreover, the safety | security of the operation | work within a chute | shoot part is securable.

  In the method for disassembling a hot stove according to the present invention, in the preceding dismantling process, it is desirable to install a carry-out device capable of moving up and down the chute and carry out the checker brick to the furnace top side using the carry-out device. .

In the present invention, in the preceding dismantling process, even when the chute part is deepened when the chute part is dug down, it can be moved up and down in the chute part using the carry-out device, and the excavated brick is carried out to the furnace top side. The unloading device can be used for the work to be performed, and the work can be performed efficiently.
In addition, as a carrying out apparatus of this invention, a gondola, a hoist, a vertical conveyance bucket conveyor, etc. can be utilized.

  In the method for disassembling a hot stove according to the present invention, in the preceding dismantling step, a safety deck for partitioning an upper portion of the furnace body is installed, and the chute part is dug down below the safety deck. It is desirable to dismantle the bricks stacked on the inner surface of the furnace body above the deck.

  In the present invention, in the preceding dismantling process, the formation work of the chute part and the dismantling work of the inner brick at the top of the furnace body can be performed in parallel at the top and bottom of the safety deck, and the construction period is longer than sequential construction. It can be shortened. In particular, the formation of the chute portion is a construction period that is increased in the present invention, but it is possible to prevent the period from increasing by making it parallel to the dismantling period of the conventional upper part of the furnace body.

  According to the method for disassembling a hot stove of the present invention, even in a hot stove where a combustion chamber is not provided in the furnace body of the heat storage chamber, such as an external combustion type hot stove or a top combustion type hot stove, the work can be simplified and the work period can be reduced. Shortening can be achieved.

Sectional drawing which shows the external combustion type hot stove in one Embodiment of this invention. The figure which shows the operation | work procedure of this embodiment. The figure which shows the scaffold installation work of this embodiment. The enlarged view which shows the safety deck installation operation | work of this embodiment. The figure which shows the carrying-out apparatus installation work and safety deck upper scaffold installation work of this embodiment. The figure which shows the brick digging work of this embodiment, and the safety deck upper brick dismantling work. The top view which shows the division setting of the chute | shoot part of this embodiment. The perspective view which shows the brick digging state of the 1st layer of the chute | shoot part of this embodiment. The perspective view which shows the brick digging state of the 2nd layer of the chute | shoot part of this embodiment. The perspective view which shows the brick digging state of the 3rd layer of the chute | shoot part of this embodiment. The figure which shows the support tool installation operation | work of this embodiment. The enlarged view which shows the support tool installation operation | work of this embodiment. The figure which shows the brick digging work using the gondola of this embodiment. The figure which shows the installation operation | work of the duct for discharge of this embodiment, and a discharge port. The figure which shows the initial stage of the remainder dismantling process of this embodiment. The figure which shows the intermediate | middle stage of the remaining part dismantling process of this embodiment. The figure which shows the removal operation | work of the checker receiving metal object of this embodiment. The figure which shows the state which the dismantling operation | work inside the furnace body of this embodiment was complete | finished. Sectional drawing which shows the furnace top combustion type hot stove in other embodiment of this invention. The figure which shows the brick digging work using the hoist in other embodiment of this invention. The figure which shows the brick digging work using the vertical conveyance bucket conveyor in other embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a hot stove 1 to which the dismantling method of the present invention is applied.
The hot stove 1 is an external combustion type hot stove in which a combustion chamber 20 is installed outside the heat storage chamber 10.
The heat storage chamber 10 has a cylindrical furnace body 11, a checker receiving metal 12 is installed at the bottom, and a brick laminate 13 is installed on the upper surface thereof.
The brick laminate 13 is formed by laminating a large number of checker bricks, and is formed over the entire area of the flat cross-sectional shape of the furnace body 11 and from the bottom to the top of the furnace body 11.

In the heat storage chamber 10, a conical part 14 is installed on the top of the furnace body 11, and a dome part 15 is installed on the top. Brick is stacked on the inner walls of the furnace body of the conical part 14 and the dome part 15, respectively.
The combustion chamber 20 has a cylindrical furnace body 21, and the dome portion 15 described above is connected to the upper portion thereof, and communicates with the interior of the furnace body 11 of the heat storage chamber 10 through the dome portion 15.

In the combustion chamber 20, a heating burner 22 is installed at the bottom of the furnace body 21. A mixing chamber 23 is connected to the side surface of the furnace body 21, and a blower pipe 24 following the blast furnace is connected to the mixing chamber 23.
Brick is also stacked on the inner wall of the furnace body 21 and the mixing chamber 23 of the combustion chamber 20.

In disassembling such a hot stove 1, the brick laminate 13 inside the heat storage chamber 10 is dismantled or carried out, the bricks stacked on the conical part 14 and the dome part 15 are disassembled or carried out, and the furnace body 21 of the combustion chamber 20. In addition, it is necessary to dismantle or carry out the bricks stacked on the inner wall of the mixing chamber 23.
Especially, since the checker brick which comprises the brick laminated body 13 reaches a huge quantity, it occupies a big ratio in the operation | work and work period which dismantle the hot stove 1. Therefore, in this embodiment, a process based on the present invention is adopted.

FIG. 2 shows specific steps in dismantling the hot stove 1.
In the present embodiment, in the dismantling of the brick laminate 13 in the heat storage chamber 10, the preceding dismantling process P1 and the remaining dismantling process P2 based on the present invention are performed, and the brick of the dome 15 is also dismantled in parallel with this. It should be noted that the brick of the conical portion 14 is disassembled together with the disassembly of the brick laminate 13, and the brick of the combustion chamber 20 and the mixing chamber 23 can be disassembled in parallel with the disassembly of the brick laminate 13.

In FIG. 2, in the preceding dismantling process P1, first, the situation in the furnace is confirmed in each of the heat storage chamber 10 and the dome part 15 (process S1). If there is no abnormality, the scaffolding and the carry-out device are installed (step S2).
In this process S2, as shown in FIG. 3, the upholstery 31 is spread | laid on the upper surface of the brick laminated body 13, and the scaffold 32 is assembled on it.
Subsequently, as shown in FIG. 4, a safety deck 33 is installed to partition the dome portion 15 and the heat storage chamber 10.
Then, as shown in FIG. 5, the scaffold 34 is assembled on the safety deck 33.
On the seat 31, a lifting gondola 35 is prepared as a carry-out device.

Returning to FIG. 2, after the installation of the scaffolding and the unloading device (step S <b> 2), the dome brick is disassembled (step S <b> 3) at the dome portion 15, and the chute brick is preceded by the brick laminate 13 in parallel. Dismantling (step S4) is performed.
As shown in FIG. 6, on the upper side of the safety deck 33, as step S <b> 3, the bricks 150 stacked on the inner wall of the dome portion 15 are disassembled using the scaffold 34, and the combustion chamber 20 (see FIG. 1) side is disassembled. Carry out. A manhole may be formed in the dome portion 15 and carried out.
On the other hand, on the lower side of the safety deck 33, as step S4, a section along the furnace body 11 on the upper surface of the brick laminate 13 is set, and in this section, the checker brick 130 constituting the brick laminate 13 is dug down, A chute portion 36 extending toward is formed.

As shown in FIG. 7, the section forming the chute 36 is along the furnace body 11 on the upper surface of the brick laminate 13 and along the seam of the checker brick 130 constituting the brick laminate 13. .
However, the checker bricks 130 constituting the brick laminate 13 are stacked in a horizontal direction in order to load each other in the upper and lower layers, so-called AB stacking or ABC stacking. Therefore, even if it is a seam of the checker brick 130 on the upper surface of the brick laminate 13 (see FIG. 8), the individual checker bricks 130 are divided in the middle at other levels (see FIG. 9 and FIG. 10).

As a result, as shown in FIG. 8, the inner wall surface of the chute portion 36 is the side surface of the checker brick 130 at the boundary where the boundary of the chute portion 36 is the seam of the checker brick 130, and the wall surface is well-organized.
However, as shown in FIG. 9 and FIG. 10, in the layer where the boundary of the chute part 36 is in the middle of the checker brick 130, the inner wall surface of the chute part 36 becomes a surface that breaks the checker brick 130 halfway and becomes an irregular wall surface. .
However, in this embodiment, the material of the checker brick 130 is collapsed by installing a support on the inner wall surface of the chute portion 36 as described later. Inconvenience such as peeling is prevented.

Returning to FIG. 2, following the prior dismantling of the chute brick (step S4), a support is installed inside the chute (step S5).
As shown in FIG. 11, a panel-like, sheet-like or net-like support 362 is stretched on the inner wall surface 361 of the chute 36 formed on the brick laminate 13.
As shown in FIG. 12, the support 362 has locking portions 363 on the upper and lower edges and can be continued by being engaged with each other.
In installation, first, the upper support 362 is arranged along the inner wall surface 361 and fixed to the inner wall surface 361 by the anchor 364. Next, the lower support 362 is placed along the inner wall surface 361 and is suspended and held by the locking portion 363 on the lower edge of the upper support 362. In this state, the anchor 364 is hit and fixed to the inner wall surface 361. To do. In the same manner, the support 362 is extended downward.

Returning to FIG. 2, the preceding dismantling of the chute unit brick (step S <b> 4) and the installation of the supporting tool inside the chute unit (step S <b> 5) use the gondola 35 that is a carry-out device that has been previously installed. Repeatedly in parallel at different heights, moving down sequentially. This repetition is performed in step S6 until it is determined that the preceding lower limit of dismantling, that is, the lower end of the brick laminate 13 has been reached.
As a result, as shown in FIG. 13, the digging of the chute portion 36 using the gondola 35 which is a carry-out device and the installation of the support 362 are gradually advanced downward.

Returning to FIG. 2, when the preceding dismantling of the chute part brick (step S <b> 4) and the installation of the support on the inside of the chute part (step S <b> 5) reach the preceding dismantling lower limit determined in step S <b> 6, The discharge port is opened (step S7). Further, the previously installed scaffold and carry-out device are removed (step S8).
As shown in FIG. 14, when the chute portion 36 reaches the lower end of the brick laminate 13, a discharge port 37 is formed in the lower portion of the furnace body 11 so that the lower end of the chute portion 36 communicates with the outside of the furnace. On the other hand, in the upper part of the heat storage chamber 10, the seating 31, the scaffold 32, and the gondola 35, which is a carry-out device, installed on the upper surface of the brick laminate 13 are removed. If the removal of the brick of the dome portion 15 has been completed, the safety deck 33 and the scaffold 34 are also removed while the brick of the conical portion 14 is dismantled.

Returning to FIG. 2, the preceding dismantling process P1 is comprised by the above process S1-S8.
At the time when the preceding dismantling process P1 is completed, the brick laminate 13 in which the chute portion 36 is formed remains in the heat storage chamber 10 (see FIG. 15).
Therefore, in order to dismantle the remaining brick laminate 13, a remaining part dismantling process P2 is performed.
In the remaining part demolition process P2, the brick laminate 13 is sequentially disassembled from the upper surface side and dropped onto the chute part 36 (process S9), and this is repeated up to the lowest stage of the brick laminate 13 (process S10).

In step S <b> 9, as shown in FIG. 15, a construction machine 38 such as a power shovel is introduced to the upper surface of the brick laminate 13 in the heat storage chamber 10 through the dome portion 15.
Then, as shown in FIG. 16, the construction machine 38 digs up the checker brick 130 on the entire top surface of the brick laminate 13 and drops it as brick waste 131 onto the chute portion 36. The dropped brick waste 131 collects at the bottom of the chute 36 and is discharged out of the furnace through the discharge port 37.

Returning to FIG. 2, after the brick laminate 13 is removed, the checker bracket is removed (step S <b> 11).
As shown in FIG. 17, in the heat storage chamber 10 from which the brick laminate 13 has been removed, the checker bracket 12 remains at the bottom. Therefore, the checker bracket 12 is disassembled and carried out of the furnace.
Thereby, as shown in FIG. 18, all the contents including the brick laminated body 13 are removed from the inside of the thermal storage chamber 10 (process S12 of FIG. 2).

According to this embodiment, there are the following effects.
In this embodiment, the chute part 36 is formed in the brick laminated body 13 in the prior dismantling process P1, and the brick waste 131 of the checker brick 130 that dismantled the brick laminated body 13 is removed in the remaining dismantling process P2. Can be efficiently carried out using
Therefore, even in the hot air furnace 1 of the present embodiment, which is an external combustion type hot air furnace, or in the furnace top combustion type hot air furnace, the brick waste 131 of the checker brick 130 can be carried out through the inside of the furnace body 11, and the furnace There is no need to install a discharge duct or the like outside the body, and the work can be simplified and the construction period can be shortened.

  In the preceding dismantling process P1, the checker brick 130 taken out by digging down the chute portion 36 is separately carried out from the dome portion 15, but is defined as a compartment (a compartment that is set to a planar shape on the upper surface of the brick laminate 13). ) Is set appropriately, the amount of bricks to be carried out separately can be minimized, and the ratio of efficient carrying out by the remaining part dismantling process P2 can be increased.

  In the present embodiment, in the preceding dismantling process P1, a support tool 362 for preventing collapse and peeling is installed on the inner wall surface 361 of the chute portion 36. For this reason, the support 362 can prevent the inner wall surface 361 of the chute 36 from collapsing and peeling off, and a stable chute 36 can be formed. In addition, the safety of work in the chute 36 can be ensured.

  In the present embodiment, in the preceding dismantling process P1, a gondola 35 that can move up and down inside the chute 36 is installed as a carry-out device, and the checker brick 130 is carried out to the dome 15 using the gondola 35. For this reason, when the chute part 36 is dug down, the gondola 35 can be used to raise and lower the chute part 36 even when the chute part 36 becomes deeper. Moreover, the gondola 35 which is a carrying-out apparatus can be utilized also for the work which carries out the excavated checker brick 130 to the dome part 15, and can work efficiently.

In the present embodiment, since the safety deck 33 that partitions the upper portion of the furnace body 11 of the heat storage chamber 10 and the dome portion 15 is installed in the preceding dismantling process P1, the chute portion 36 is dug down below the safety deck 33 and in parallel. Thus, the brick 150 stacked on the inner surface of the dome 15 above the safety deck 33 can be disassembled.
That is, the work for forming the chute portion 36 and the work for dismantling the brick 150 on the inner surface of the dome portion 15 can be performed in parallel above and below the safety deck 33, and the construction period can be shortened compared to sequential construction.

Note that the present invention is not limited to the above-described embodiment, and modifications and the like within a scope in which the object of the present invention can be achieved are included in the present invention.
For example, in the above embodiment, the hot stove 1 is an external combustion type hot stove, but the present invention can also be applied to a top combustion type hot stove.

FIG. 19 shows another embodiment of the present invention.
In FIG. 19, the hot stove 2 is a furnace top combustion type hot stove, the heat storage chamber 10A has a cylindrical furnace body 11A, a checker receiving metal 12A is installed at the bottom, and a brick laminate on the top surface thereof. 13A is installed.
A combustion chamber 20A is connected to the side surface near the furnace top of the heat storage chamber 10A, and a heating burner 22A is installed therein.
A mixing chamber 23A is connected to the side surface of the heat storage chamber 10A, and a blowing pipe 24A following the blast furnace is connected to the mixing chamber 23A.

  Also in the dismantling operation of the furnace top combustion type hot air furnace 2, the chute portion 36A is formed in the brick laminate 13A by the preceding dismantling process P1 (see FIG. 2), and the remaining portion of the brick laminate 13A is formed by the remaining dismantling process P2. Is disassembled and dropped onto the chute portion 36A, so that an efficient dismantling operation as described in the above embodiment can be performed.

In the above embodiment, the brick laminate 13 and the brick of the dome 15 are demolished in parallel above and below the safety deck 33. Such parallel work and installation of the safety deck 33 are within the scope of the present invention. It is not essential and each operation may be performed sequentially.
In the above embodiment, the upholstery 31 is laid on the brick laminate 13, the scaffold 32 is assembled thereon, and the scaffold 34 is assembled on the safety deck 33. However, the form and structure thereof may be changed as appropriate.

In the said embodiment, the gondola 35 which can raise / lower the inside of the chute | shoot part 36 was installed as a carrying-out apparatus. Other configurations may be used as the carry-out device in the present invention.
In another embodiment shown in FIG. 20, as a carry-out device, a hoist 35 </ b> A is installed on the scaffold 31, and the bucket 35 </ b> B is suspended by the hoist 35 </ b> A to raise and lower the inside of the chute portion 36.
In another embodiment shown in FIG. 20, a vertical transfer bucket conveyor 35 </ b> C is installed as a carry-out device.
Also by each embodiment using such a hoist 35A or vertical conveyance bucket conveyor 35C, the same effect as the embodiment described in FIGS. 1 to 18 can be obtained.

  The present invention relates to a method for disassembling a hot stove, and can be used for a dismantling method for an external combustion type hot stove or a top combustion type hot stove where a combustion chamber is not provided in the regenerator chamber.

  DESCRIPTION OF SYMBOLS 1,2 ... Hot-blast furnace, 10,10A ... Thermal storage chamber, 11, 11A ... Furnace body, 12, 12A ... Checker metal fitting, 13, 13A ... Brick laminated body, 130 ... Checker brick, 131 ... Brick waste, 14 ... Conical , 15 ... Dome, 150 ... Brick, 20, 20A ... Combustion chamber, 21 ... Furnace, 22, 22A ... Burner, 23, 23A ... Mixing chamber, 24, 24A ... Air blower, 31 ... Seating, 32 ... Scaffolding 33 ... Safety deck 34 ... Scaffolding 35 ... Gondola as unloading device, 35A ... Hoist as unloading device, 35B ... Bucket, 35C ... Vertical conveying bucket conveyor as unloading device, 36, 36A ... Chute part, 361 ... inner wall surface, 362 ... support, 363 ... locking part, 364 ... anchor, 37 ... discharge port, 38 ... construction machine, P1 ... preceding dismantling process, P2 ... remaining dismantling process, S1 to S12 Process.

Claims (4)

A method for disassembling a hot blast furnace applied to a hot blast furnace having a brick laminate formed by stacking a large number of checker bricks inside a furnace body of a heat storage chamber, dismantling the brick laminate and carrying it out of the furnace body Because
Prior to forming a chute part extending down to the lower part of the furnace body and forming a discharge port communicating with the chute part at the lower part of the furnace body by digging the checker brick at a part of the upper surface of the brick laminate Dismantling process,
And a remaining part dismantling step of cutting out the remaining part of the brick laminate, dropping it onto the chute part, and carrying it out from the discharge port. The method for disassembling a hot stove according to claim 1,
In the preceding dismantling step, a dismantling method for a hot stove characterized in that a support for preventing collapse or peeling is installed on the inner wall of the chute. In the method for disassembling a hot stove according to claim 1 or 2,
In the preceding dismantling step, a dismantling method for a hot stove characterized in that an unloading device capable of moving up and down inside the chute is installed, and the checker brick is unloaded to the furnace top side using the unloading device. The method for disassembling a hot stove according to any one of claims 1 to 3,
In the preceding dismantling process, a safety deck that partitions the upper part of the furnace body is installed, and the chute is dug down below the safety deck, and in parallel, on the inner surface of the furnace body above the safety deck A dismantling method for a hot stove characterized by dismantling the stacked bricks.