Method and equipment for dismantling refractory materials inside a furnace.

Abstract

In a method for dismantling furnace refractories, specifically for vertically elongated cylindrical furnaces that use asbestos material in part of the furnace refractories, the aim is to minimize the installation of enclosures to seal the area to be dismantled while efficiently and economically carrying out the dismantling work on the furnace refractories. [Solution] A demolition facility A, equipped with a work stage 1 and a work chamber 2 for transporting demolition waste, is temporarily installed above the furnace, which has an open top, by supporting it on the furnace's steel shell x. The inside of the work chamber 2 and the space inside the furnace's steel shell x are made into a single sealed space S, and "work chamber 2 + steel shell x" is used as an enclosure to seal off the object to be demolished. A dust collector 7 is used to create negative pressure inside the sealed space S, and the refractory materials inside the furnace are demolished. The demolition waste transport container 8 containing the demolition waste is then transported to the outside through the work chamber 2.

Description

Technical Field

[0001] The present invention relates to a method for disassembling refractory materials in a furnace and disassembling equipment, which is targeted at a vertically long cylindrical furnace using asbestos materials for a part of the refractory materials in the furnace.

Background Art

[0002] Conventionally, in the iron-making field and the like, a vertically long cylindrical furnace in which refractory materials such as refractory bricks are arranged inside an iron skin (iron outer skin) has been used. A typical example is a hot blast stove for supplying hot air to a blast furnace. There are internal combustion type and external combustion type hot blast stoves. For example, a vertically long cylindrical furnace constituting the regenerator of an external combustion type hot blast stove has a structure in which refractory materials such as refractory bricks are laminated on the inner wall surface of the iron skin, and regenerator bricks (refractory materials for heat storage) are laminated inside thereof. When a hot blast stove is used for a long period (decades), the furnace body iron skin and the internal refractory materials deteriorate, and in order to renew them, it is necessary to disassemble the deteriorated refractory materials in the furnace.

[0003] In some of the hot blast stoves constructed in the past, asbestos materials are used for a part of the refractory materials in the furnace. The asbestos materials are used in various parts of the hot blast stove. For example, they are used in the form of interposing an asbestos sheet at the vertical contact part of the regenerator bricks. <所 When disassembling a structure containing asbestos, it is necessary to seal and confine it in order to prevent the scattering of asbestos. In levels 1 and 2 of asbestos disassembly classification, generally, the object to be disassembled is surrounded and sealed by construction equipment or a building, and a dust collector is connected to make the sealed interior in a negative pressure state to carry out the disassembly work (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004] <所

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, tall, cylindrical furnaces such as hot blast furnaces are very large furnace facilities (generally hot blast furnaces are over 20 meters tall), and applying the general demolition methods described above to dismantle the refractory materials inside them is not practical. Therefore, an object of the present invention is to provide a method for dismantling furnace refractories for a vertically elongated cylindrical furnace in which asbestos material is used as part of the furnace refractories, which can efficiently and economically carry out the dismantling of furnace refractories while minimizing the installation of enclosures to seal the object to be dismantled for dismantling work. Another object of the present invention is to provide dismantling equipment (construction equipment) to be used in carrying out this dismantling method. [Means for solving the problem]

[0006] As a result of repeated studies to solve the above problems, the inventors have devised a new demolition method that minimizes the need for enclosures to be installed for demolition work while efficiently removing demolition waste from a sealed space. This is achieved by (i) installing demolition equipment A, which includes a work chamber 2 for removing demolition waste, above the furnace, supported by the furnace shell x, and (ii) using the furnace shell x as part of an enclosure to seal off the object to be demolished, and creating an integrated sealed space S for sealing off the object to be demolished by combining the inside of the work chamber 2 of the demolition equipment A and the inside space of the furnace shell x. In other words, the gist of the present invention for solving the above problems is as follows.

[0007] [1] A method for dismantling a furnace refractory in a vertically elongated cylindrical furnace equipped with an iron shell (x) and using asbestos material as part of the furnace refractory, characterized in that it comprises the following steps [A] to [D]. [A]: Remove the structural parts at the top of the furnace, leaving the top of the furnace open. [i]: Demolition equipment (6) is brought into the furnace from the top of the furnace. [U]: A temporary demolition facility (A) is installed above the furnace, comprising a work stage (1) supported by the steel shell (x) via a support member and having an opening (10) for passing a demolition waste transport container (8), a work room (2) provided on the work stage (1) with a door (20) for bringing the demolition waste transport container (8) in and out of the room, with the opening (10) located inside the room, and a sealing member (3) that closes and seals the space between the work stage (1) and the steel shell (x), thereby creating an integrated sealed space (S) that connects the inside of the work room (2) and the inside space of the steel shell (x) through the opening (10). [E]: A dust collector (7) connected to the workroom (2) via a duct (9) is used to create a negative pressure inside the sealed space (S). The refractory materials inside the furnace are then sequentially dismantled from the top of the furnace using a demolition machine (6). A fixed amount of the dismantled material is placed into a dismantling material transport container (8). This dismantling material transport container (8) is then lifted into the workroom (2) through the opening (10) and then transported out of the workroom (2) through the entrance / exit (20).

[0008] [2] In the demolition method described in [1] above, the demolition equipment (A) further comprises a lifting device (4) that is horizontally movable on the ceiling of the work room (2), and a traverse cart (5) that can move in and out of the work room (2) on the work stage (1), In step [E], a method for dismantling refractory materials inside a furnace is characterized by using a lifting device (4) to lift a demolition waste transport container (8) containing demolition waste into the work chamber (2) through an opening (10), then placing it on a traverse cart (5), and moving the traverse cart (5) to transport the demolition waste transport container (8) to the outside of the work chamber (2) through an entrance (20).

[0009] [3] In the demolition method of [1] or [2] above, the work chamber (2) comprises a first chamber (2a) in which the demolition waste transport container (8) is lifted and lowered through the opening (10) of the work stage (1), and a second chamber (2b) adjacent to the first chamber (2a), The second room (2b) is provided with an entrance (20) with a door for moving the demolition waste transport container (8) in and out of the work area, and the partition between the first room (2a) and the second room (2b) is provided with an entrance (20a) with a door. In step [E], when transporting the demolition waste transport container (8) containing the demolition waste to the outside of the workroom (2), the door (21a) of the entrance (20a) is opened while the door (21) of the entrance (20) is closed, the demolition waste transport container (8) is moved into the second room (2b), the door (21a) of the entrance (20a) is closed, and then the door (21) of the entrance (20) is opened to move the demolition waste transport container (8) to the outside of the workroom (2). This is a method for dismantling refractory materials inside a furnace.

[0010] [4] In the dismantling method of [3] above, step [E] is characterized in that when transporting the dismantling waste transport container (8) containing the dismantling waste to the outside of the work room (2), the dismantling waste transport container (8) is subjected to scattering prevention and packaging treatment in the first room (2a), the dismantling waste transport container (8) is moved to the outside of the work room (2) via the second room (2b), and then lowered to the ground with a crane, in order to dismantle the refractory material inside the furnace.

[0011] [5] In a vertically elongated cylindrical furnace equipped with an iron shell (x) and using asbestos material in part of the furnace refractory material, a dismantling device for dismantling the furnace refractory material, This is a temporary facility installed above the furnace. The system comprises a work stage (1) having an opening (10) for passing a demolition waste transport container (8) through, and supported by a support member on a steel shell (x); a work chamber (2) provided on the work stage (1) having an entrance / exit (20) with a door for moving the demolition waste transport container (8) in and out of the room, with the opening (10) located inside the room; and a sealing member (3) that closes and seals the space between the work stage (1) and the steel shell (x). A furnace refractory dismantling apparatus characterized by a work chamber (2) and the inner space of the steel shell (x) being connected by an opening (10) to form an integrated sealed space (S), and a dust collector (7) being connected to the work chamber (2) via a duct (9).

[0012] [6] The dismantling equipment for furnace refractories, further comprising a lifting device (4) that is horizontally movable on the ceiling of the work chamber (2), and a traversing trolley (5) that can move in and out of the work chamber (2) on the work stage (1). [7] In the demolition equipment described in [5] or [6] above, the work chamber (2) comprises a first chamber (2a) through the opening (10) of the work stage (1) where the demolition waste transport container (8) is lifted and lowered, and a second chamber (2b) adjacent to the first chamber (2a), The equipment for dismantling refractory materials inside a furnace is characterized in that the second chamber (2b) is provided with an entrance (20) with a door for moving a demolition waste transport container (8) in and out of the work area, and the partition between the first chamber (2a) and the second chamber (2b) is provided with an entrance (20a) with a door. [Effects of the Invention]

[0013] According to the present invention, in a method for dismantling a furnace refractory, specifically a vertically elongated cylindrical furnace in which asbestos material is used as part of the furnace refractory, the method is characterized by (i) providing a dismantling facility A, equipped with a work chamber 2 for removing dismantling debris, at a position above the furnace, supported by the furnace shell x, and (ii) utilizing the furnace shell x as part of an enclosure to seal the object to be dismantled, and creating an integrated sealed space S between the inside of the work chamber 2 of the dismantling facility A and the inside space of the furnace shell x to seal the object to be dismantled. This minimizes the amount of enclosure installed for the dismantling work, while efficiently removing dismantling debris from the sealed space. Therefore, the dismantling work of the furnace refractory can be carried out efficiently and economically. [Brief explanation of the drawing]

[0014] [Figure 1] A schematic diagram illustrating the general structure of an external combustion type hot air furnace. [Figure 2] This is an explanatory diagram illustrating the implementation status of one embodiment of the present invention, showing the furnace body in a longitudinal section. [Figure 3] A schematic diagram showing a longitudinal cross-section of the demolition equipment A and the upper part of the furnace in one embodiment of the present invention. [Figure 4] This is a schematic explanatory diagram showing the demolition equipment A in one embodiment of the present invention, with the workroom 2 in a horizontal cross-section. [Figure 5]This shows the transfer and handling procedure of the demolition waste transport container 8 containing demolition waste in an embodiment of the present invention. Fig. 5(a) is an explanatory diagram schematically showing the state of the demolition equipment A and the upper part of the furnace in a longitudinal section, and Fig. 5(b) is an explanatory diagram schematically showing the state of the demolition equipment A in a horizontal section of the working chamber 2. [Figure 6] This shows the transfer and handling procedure of an empty demolition waste transport container 8 in an embodiment of the present invention. Fig. 6(a) is an explanatory diagram schematically showing the state of the demolition equipment A and the upper part of the furnace in a longitudinal section, and Fig. 6(b) is an explanatory diagram schematically showing the state of the demolition equipment A in a horizontal section of the working chamber 2. [Figure 7] Explanatory diagram showing the demolition process of the in-furnace refractory y in order in an embodiment of the present invention.

Embodiments for Carrying out the Invention

[0015] The present invention is a method for demolishing in-furnace refractories in a vertically long cylindrical furnace using an asbestos material for a part of the in-furnace refractories. Hereinafter, embodiments of the present invention will be described by taking the case where the furnace is a hot blast stove (a furnace for supplying hot blast to a blast furnace) as an example. Fig. 1 is an explanatory diagram schematically showing the outline of an externally fired hot blast stove. This hot blast stove has a structure in which a combustion chamber 70 and a regenerator chamber 80 are provided separately, and dome portions 70d and 80d at the upper parts of the combustion chamber 70 and the regenerator chamber 80 are connected by a connecting pipe 90. In the present embodiment, the object of the demolition work of the in-furnace refractory is a vertically long cylindrical furnace, which is the regenerator chamber 80. This furnace consists of a cylindrical straight body portion 80f and a dome portion 80d at the upper end, and has a structure in which refractories such as refractory bricks are arranged inside the iron skin x. And the inside of the straight body portion 80f is filled with regenerator bricks, and an asbestos material is used for a part of them.

[0016] The demolition method of the present invention is: (i) providing a demolition equipment A equipped with a working chamber 2 or the like for carrying out the removal of demolition waste at an upper position of the furnace in a form supported by the iron skin x of the furnace; (ii) using the iron skin x of the furnace as a part of an enclosure for sealing the demolition object, and making the internal space of the working chamber 2 of the above-mentioned demolition equipment A and the inner space of the iron skin x of the furnace into an integral sealed space S for sealing the demolition object. This is the basic feature. Figure 2 schematically shows an overview of the implementation status in one embodiment of the present invention, with the furnace body in a longitudinal section, showing that dismantling equipment A has been temporarily installed above the furnace and that the dismantling of the furnace refractory material has begun.

[0017] In this embodiment, the dismantling of the furnace refractory materials is basically carried out in the following steps (procedures). First, the structural parts of the upper part of the furnace are removed, leaving the top of the furnace open (step [a]). In the case of the furnace (heat storage chamber 80) in Figure 1, the upper dome part 80d is removed, leaving the straight cylinder part 80f, resulting in a furnace body with an open top (hereinafter referred to as furnace body F). This furnace body F has a steel shell x along its entire length in the furnace height direction. The method of removing the upper part of the furnace in this step is not specifically shown in the diagram, but for example, the upper steel shell can be lifted with a crane, and the steel shell can be cut and removed. The height position at which the steel shell is cut can be appropriately determined according to the furnace structure and the position of the upper end of the refractory material inside the furnace. Subsequently, demolition equipment 6 (such as a hydraulic excavator with demolition specifications) is lifted from the ground using a crane or similar device and brought into the furnace body F through the opened top end of the furnace, and positioned at the top of the refractory material to be demolished (process [a]).

[0018] Next, a temporary demolition facility A is erected above the furnace, consisting of a work stage 1 with an opening 10 for lifting materials and a work room 2 installed on top of it, and the inside of the work room 2 and the inner space of the steel shell x are connected by the opening 10 to form an integrated sealed space S (step [c]). In other words, a temporary demolition facility A is erected such that "work room 2 + steel shell x" becomes an enclosure that seals the object to be demolished. Furthermore, there is a metal shell opening (not shown) at the bottom of the furnace for connecting the exhaust and supply pipes, but this metal shell opening is closed with a sealing plate. In addition, there is a bottom plate z connected to the metal shell x at the bottom of the furnace, ensuring airtightness with the metal shell x. Therefore, by temporarily constructing the demolition equipment A including the workroom 2 as described above, a sealed space S consisting of "workroom 2 + metal shell x" can be formed by enclosure.

[0019] Figures 3 and 4 show enlarged views of the dismantling equipment A temporarily installed above the furnace. Figure 3 is a schematic explanatory diagram showing the dismantling equipment A and the upper part of the furnace in a vertical cross-section, while Figure 4 is a schematic explanatory diagram showing the dismantling equipment A in a horizontal cross-section of the work chamber 2. The demolition equipment A of this embodiment consists of the work stage 1 and work chamber 2 described above, a sealing member 3 that closes and seals the gap between the work stage 1 and the steel shell x, and means for transporting and removing demolition waste.

[0020] The work stage 1 has an opening 10 for lifting materials, i.e., for passing the demolition waste transport container 8, and is supported by the furnace body F (steel shell x) via a support member 11 (column) at a position above the furnace body F. The lower end of the support member 11 is fixed to the upper end of the steel shell x, and supports the work stage 1 at a position above the furnace body F. As shown in Figure 3, normally, in the initial stages of demolition work of the refractory materials inside the furnace, the arm of the demolition machine 6 reaches a position above the furnace body F, so the work stage 1 is supported at a height that does not interfere with the arm of the demolition machine 6. The work stage 1 has an area 100 located directly above the furnace body F where the work chamber 2 is installed, as well as an area 101 (extension) that extends outwards on the entrance side of the work chamber 2 for lowering demolition debris. Furthermore, the openings 10 are provided to penetrate the thickness direction (vertical direction) of the work stage 1, and in this embodiment, they are provided in two locations on the work stage 1. The number of these openings 10 is arbitrary, and only the necessary number should be installed considering workability and other factors.

[0021] The workroom 2 has an entrance / exit 20 with a door for bringing the demolition waste transport container 8 in and out of the room, and is provided on the work stage 1 such that the opening 10 is located inside the room. The workroom 2 is provided airtightly to the work stage 1 so that the sealed space S described above is formed. While the workroom 2 can be composed of a single space (room), in this embodiment, in order to maintain airtightness of the workroom 2 as much as possible when the demolition waste transport container 8 is moved in and out of the room, the workroom 2 is composed of a first room 2a through the opening 10 of the work stage 1 where the demolition waste transport container 8 is lifted and lowered, and a second room 2b adjacent to the first room 2a. The second room 2b is provided with an entrance / exit 20 with a door for moving the demolition waste transport container 8 in and out of the workroom, and an entrance / exit 20a with a door is provided as a partition between the first room 2a and the second room 2b. In other words, the first room 2a constitutes the main workroom, and the second room 2b constitutes a so-called pass box. Generally, the doors of entrances 20, 20a (doors 21, 21a) are made of shutters, but are not limited to this. In this embodiment, as will be described later, the traverse trolley 5 is movably installed within the work chamber 2, so the openings 10 of the work stage 1 in the first chamber 2a are provided at two locations (on both sides of the track 13) flanking the track 13 of the traverse trolley 5.

[0022] The sealing member 3 is a means of sealing the gap (the gap around the entire perimeter of the furnace) between the work stage 1, which is supported above the furnace body F (steel shell x), and the steel shell x. For example, it can be made of a plate or sheet to seal the gap, or a combination thereof. Specifically, the gap can be covered with a plate (steel plate), and then a sealing sheet can be attached from the inside to ensure airtightness (i.e., the sealing member 3 consists of a plate + sheet). In short, the sealing member 3 only needs to be a means that can seal the gap between the work stage 1 and the steel shell x to achieve airtightness. This makes it possible to form a sealed space S consisting of the inside of the work chamber 2 and the inner space of the steel shell x. Various methods can be considered for transporting and unloading demolition waste (demolition waste transport container 8) from the demolition work department. However, the demolition equipment A in this embodiment includes a lifting device 4 that is horizontally movable on the ceiling of the work room 2 (first room 2a), and a traverse cart 5 that can travel inside and outside the work room 2 on the work stage 1, as means for transporting and unloading the waste. Needless to say, these lifting device 4 and traverse cart 5 are also means for transporting and unloading empty demolition waste transport containers 8 from outside the work room 2 to the demolition work department.

[0023] The lifting device 4 is composed of, for example, a hoist. A rail 12 (such as a hoist rail) for the lifting device is provided on the ceiling of the workroom 2 (first room 2a), and the lifting device 4 is held on this rail 12 so as to be able to move horizontally. The traverse trolley 5 is a track-running trolley. This traverse trolley 5 can move on the work stage 1 from a position between the two openings 10 of the first chamber 2a, through the first chamber 2a and the second chamber 2b, to the area 101 outside the entrance 20 (the protruding part of the work stage 1), and a track 13 for the traverse trolley is provided within this range of movement. In other drawings, 14 is a furnace lifting device, which is attached to the work stage 1 as a means for workers to move up and down between the work stage 1 and the demolition work area. Furthermore, the means for transporting the demolition waste (demolition waste transport container 8) on the work stage 1 is not limited to the traversing cart 5 as in this embodiment; for example, forklifts or manual carts can also be used. After the installation of demolition equipment A is completed, or in parallel with the installation of demolition equipment A, a dust collector 7 is connected to workroom 2 (first room 2a) via duct 9. There are no particular restrictions on the location of the connection of this duct 9 as long as it is in the first room 2a. The dust collector 7 is installed, for example, on the work floor near the demolition site.

[0024] Once preparations for dismantling the furnace refractory materials are complete as described above, the dust collector 7 is used to create negative pressure in the sealed space S, and the dismantling of the furnace refractory materials y is started using the dismantling machine 6. The dismantling of the furnace refractory materials y by the dismantling machine 6 is carried out sequentially from the upper side of the furnace to the lower side. During this dismantling work, a fixed amount of dismantling waste is placed into the dismantling waste transport container 8, and as shown by the arrow in Figure 2, the dismantling waste transport container 8 is lifted into the work room 2 through the opening 10 of the work stage 1, and then transported out of the work room 2 through the entrance / exit 20 (step [E]). After that, the dismantling waste transport container 8 is lowered by a crane or the like and transported to a suitable disposal site. Figure 5 shows the transfer and removal procedure of the demolition waste transport container 8 containing demolition waste in this embodiment. Figure 5(a) is a schematic explanatory diagram showing the demolition equipment A and the upper part of the furnace in a vertical cross-section, and Figure 5(b) is a schematic explanatory diagram showing the demolition equipment A (workroom 2) in a horizontal cross-section.

[0025] As shown in Figure 5, demolition waste is placed into an empty demolition waste transport container 8 (reference numeral 8(1) in the figure) that has been brought into the demolition work area. This demolition waste transport container 8 is then lifted into the work room 2 (first room 2a) through the opening 10 using a lifting device 4 (reference numerals 8(2), 8(3) in the figure), placed on a traverse cart 5, and the traverse cart 5 is moved to transport the demolition waste transport container 8 out of the entrance 20 to the outside of the work room 2 (area 101 of the work stage 1) (reference numerals 8(4), 8(5) in the figure). Furthermore, at this time of transport, it is preferable to perform scattering prevention and packaging treatment on the demolition waste transport container 8 placed on the traverse cart 5 in the first room 2a. As scattering prevention and packaging treatment, for example, water is sprayed on the demolition waste, then a sheet is placed over the demolition waste transport container 8 and the sheet is fixed to the demolition waste transport container 8.

[0026] Here, when transporting the demolition waste transport container 8 from the workroom 2 (first room 2a) through the entrance / exit 20, the door 21 of the entrance / exit 20 of the second room 2b is closed, and the door 21a of the entrance / exit 20a is left open while the demolition waste transport container 8 is moved into the second room 2b (reference numeral 8(4) in the figure). Then, the door 21a of the entrance / exit 20a is closed, and then the door 21 of the entrance / exit 20 of the second room 2b is opened to move the demolition waste transport container 8 to the outside of workroom 2 (area 101 of work stage 1) (reference numeral 8(5) in the figure). The demolition waste transport container 8, which has been moved to the outside of workroom 2 (area 101 of work stage 1), is lowered to the ground using a crane or similar device, loaded onto a truck, and transported to an asbestos disposal site or similar location.

[0027] Furthermore, in order to transport the empty demolition waste transport container 8 from outside the workroom 2 to the demolition work area, the transport and delivery of the demolition waste transport container 8 is carried out in the exact reverse order of Figure 5. Figure 6 shows the procedure for transporting and loading empty demolition waste transport containers 8 in this embodiment. Figure 6(a) is a schematic explanatory diagram showing the demolition equipment A and the upper part of the furnace in a vertical cross-section, and Figure 6(b) is a schematic explanatory diagram showing the demolition equipment A (workroom 2) in a horizontal cross-section.

[0028] Specifically, as shown in Figure 6, the empty demolition waste transport container 8, which has been lifted from the ground by a crane, is placed on a traverse cart 5 outside the workroom 2 (area 101 of the work stage 1) (reference numeral 8(6) in the figure), and this traverse cart 5 is moved to transport the demolition waste transport container 8 into the workroom 2 through the entrance / exit 20. At this time, the door 21a of entrance / exit 20a is closed, and the door 21 of entrance / exit 20 of the second room 2b is opened, and the demolition waste transport container 8 is moved into the second room 2b (reference numeral 8(7) in the figure). Then the door 21 of entrance / exit 20 is closed, and then the door 21a of entrance / exit 20a is opened to move the demolition waste transport container 8 into the first room 2a. The demolition waste transport container 8 that has moved into the first room 2a is lifted by a lifting device 4 (reference numeral 8(8) in the figure) and lowered through the opening 10 into the demolition work section inside the furnace (reference numeral 8(9) in the figure). In this way, the empty demolition waste transport container 8 (reference numeral 8(10) in the figure), which has been brought to the demolition work department, is filled with newly generated demolition waste and then transported out as shown in Figure 5. Figure 7 shows the sequential dismantling process of the furnace refractory material y. The dismantling of the furnace refractory material y is carried out sequentially from the top of the furnace downwards, and is completed when it reaches the bottom of the furnace. The dismantling work is basically carried out by the dismantling construction machine 6, but some of it may be done manually by workers.

[0029] Furthermore, the demolition equipment A of the present invention is a temporary facility installed above the furnace, and comprises a work stage 1 supported by a steel shell x via a support member 11 and having an opening 10 for passing a demolition waste transport container 8 through, a work room 2 provided on the work stage 1 with an entrance / exit 20 with a door for moving the demolition waste transport container 8 in and out of the room, with the opening 10 located inside the room, and a sealing member 3 that closes and seals the space between the work stage 1 and the steel shell x, forming an integrated sealed space S with the inside of the work room 2 and the inside space of the steel shell x connected by the opening 10, and a dust collector 7 connected to the work room 2 via a duct 9. Furthermore, the demolition equipment A of this embodiment comprises a lifting device 4 that is horizontally movable on the ceiling of the work room 2, and a traverse trolley 5 that can move inside and outside the work room 2 on the work stage 1. Furthermore, the workroom 2 comprises a first room 2a where the demolition waste transport container 8 is lifted and lowered through the opening 10 of the work stage 1, and a second room 2b adjacent to the first room 2a. The second room 2b is provided with an entrance / exit 20 with a door for moving the demolition waste transport container 8 in and out of the workroom, and an entrance / exit 20a with a door is provided as a partition between the first room 2a and the second room 2b. The details and usage of the demolition equipment A are as described above.

[0030] As explained using this embodiment as an example, the demolition method and demolition equipment of the present invention utilize the furnace shell x as part of an enclosure to seal the object to be demolished. This has the advantage of minimizing the installation of enclosures, as the only enclosure required for demolition work is the work chamber 2 (and sealing member 3) located above the furnace. Furthermore, by installing the demolition equipment A, consisting of the work chamber 2 and work stage 1, etc., above the furnace in a manner supported by the furnace shell x, and by configuring a means and route for transporting demolition waste, demolition waste can be efficiently transported out of the sealed space S (the inside of the work chamber 2 + the space inside the shell x). Furthermore, the present invention is not limited to the heat storage chamber of an external combustion type hot blast furnace as in this embodiment, but can also be applied to various furnaces and towers containing asbestos, including internal combustion type hot blast furnaces. [Explanation of symbols]

[0031] 1. Work Stage 2. Workroom 2a First room 2b Second room 3 Sealing member 4. Lifting device 5. Traverse trolley 6. Demolition equipment 7. Dust collector 8. Demolition waste transport container 9 ducts 10 Openings 11 Support Member 12 rails 13 orbit 14 Furnace lifting equipment 20,20a entrance / exit 21,21a Door 100,101 areas A Demolition equipment F Furnace body x Ironhide y Furnace refractories z Bottom plate S closed space

Claims

1. A method for dismantling a furnace refractory in a vertically elongated cylindrical furnace equipped with an iron shell (x) and using asbestos material as part of the furnace refractory, characterized in that it comprises the following steps [A] to [D]. [A]: Remove the structural parts at the top of the furnace, leaving the top of the furnace open. [i]: The demolition equipment (6) is brought into the furnace from the top of the furnace. [U]: A temporary demolition facility (A) is set up above the furnace, comprising a work stage (1) supported by the steel shell (x) via a support member and having an opening (10) for passing a demolition waste transport container (8), a work room (2) provided on the work stage (1) with a door (20) for bringing the demolition waste transport container (8) in and out of the room, with the opening (10) located inside the room, and a sealing member (3) that closes and seals the space between the work stage (1) and the steel shell (x), thereby creating an integrated sealed space (S) that connects the inside of the work room (2) and the inside space of the steel shell (x) through the opening (10). [E]: A dust collector (7) connected to the workroom (2) via a duct (9) is used to create a negative pressure inside the sealed space (S). The refractory materials inside the furnace are then sequentially dismantled from the top of the furnace using a demolition machine (6). A fixed amount of the dismantled material is placed into a dismantling material transport container (8). This dismantling material transport container (8) is then lifted into the workroom (2) through the opening (10) and then transported out of the workroom (2) through the entrance / exit (20).

2. The demolition equipment (A) further includes a lifting device (4) that is horizontally movable on the ceiling of the work room (2), and a traverse trolley (5) that can move in and out of the work room (2) on the work stage (1). The method for dismantling furnace refractories according to claim 1, characterized in that in step [E], the dismantling waste transport container (8) containing the dismantling waste is lifted into the work room (2) through the opening (10) using a lifting device (4), then placed on a traverse cart (5), and the traverse cart (5) is moved to transport the dismantling waste transport container (8) to the outside of the work room (2) through the entrance (20).

3. The workroom (2) comprises a first room (2a) where the demolition waste transport container (8) is lifted and lowered through the opening (10) of the work stage (1), and a second room (2b) adjacent to the first room (2a). The second room (2b) is provided with an entrance (20) with a door for moving the demolition waste transport container (8) in and out of the work area, and the partition between the first room (2a) and the second room (2b) is provided with an entrance (20a) with a door. In step [E], when transporting the demolition waste transport container (8) containing the demolition waste to the outside of the work room (2), the door (21a) of the entrance (20a) is opened while the door (21) of the entrance (20) is closed, the demolition waste transport container (8) is moved into the second room (2b), then the door (21a) of the entrance (20a) is closed, and then the door (21) of the entrance (20) is opened to move the demolition waste transport container (8) to the outside of the work room (2), characterized in that, in step [E], when transporting the demolition waste transport container (8) containing the demolition waste to the outside of the work room (2), the method for dismantling furnace refractories according to claim 1 or 2.

4. In step [E], when transporting the demolition waste transport container (8) containing the demolition waste to the outside of the work room (2), the demolition waste transport container (8) is subjected to scattering prevention and packaging treatment in the first room (2a), then the demolition waste transport container (8) is moved to the outside of the work room (2) via the second room (2b), and then lowered to the ground with a crane, as described in claim 3, for the method of dismantling furnace refractories.

5. In a vertically elongated cylindrical furnace equipped with an iron shell (x) and using asbestos material in part of the furnace refractory material, a dismantling device for dismantling the furnace refractory material is provided, This is a temporary facility installed above the furnace. The system comprises a work stage (1) having an opening (10) for passing a demolition waste transport container (8) through, and supported by a support member on a steel shell (x); a work chamber (2) provided on the work stage (1) having an entrance / exit (20) with a door for moving the demolition waste transport container (8) in and out of the room, with the opening (10) located inside the room; and a sealing member (3) that closes and seals the space between the work stage (1) and the steel shell (x). A furnace refractory dismantling device characterized by forming an integrated sealed space (S) by connecting the interior of the work chamber (2) and the inner space of the steel shell (x) through an opening (10), and by connecting a dust collector (7) to the work chamber (2) via a duct (9).

6. Furthermore, the equipment for dismantling furnace refractories according to claim 5 is characterized by comprising a suspension device (4) that is horizontally movable on the ceiling of the work chamber (2), and a traversing trolley (5) that can move in and out of the work chamber (2) on the work stage (1).

7. The workroom (2) comprises a first room (2a) where the demolition waste transport container (8) is lifted and lowered through the opening (10) of the work stage (1), and a second room (2b) adjacent to the first room (2a). The furnace refractory dismantling equipment according to claim 5 or 6, characterized in that the second chamber (2b) is provided with an entrance (20) with a door for bringing the demolition waste transport container (8) in and out of the work chamber, and the partition between the first chamber (2a) and the second chamber (2b) is provided with an entrance (20a) with a door.

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