KR20140066215A - Blocking/opening method, blocking method and blocking/opening apparatus - Google Patents

Abstract

A method of opening a closed space according to the present invention is a method of opening an exit port formed by closing an exit port formed in a furnace wall of a blast furnace and closing the exit port. After the mud material and the closure cap are pressed and filled into the exit port, And a pouring step of forming the exit port by excavating the closed plug and the fired mud material, wherein the occluding plug is more flexible than the sintered material of the mud material And the formed portion is continuous over its entire length.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for blocking an obstacle,

The present invention relates to a closed method of opening an exit port that is closed together with an exit port formed on a furnace wall of a blast furnace, and a method of closing an obstruction open device and an exit port.

The present application claims priority to Japanese Patent Application No. 2011-210737, filed on September 27, 2011, the contents of which are incorporated herein by reference.

In the blast furnace, which is one of the steel making facilities, pig iron is taken out by reducing the oxygen contained in the iron ore. The molten iron (molten pig iron) stored in the molten metal stream in the furnace is taken out from the outlet port provided on the furnace wall next to the molten metal stream. The outlet is closed by filling the refractory on the clay-like material called mud material and baking it. The extraction of the molten iron is performed by using a pneumatic or hydraulic open air to cause the feed rod to perform forward, backward, striking, and rotating operations to open an occluding member filled in the outlet.

After the molten iron is taken out from the molten metal stream, the mud material is charged into the outlet and fired to close the outlet. As described above, for each of the opening and closing operations of the exit port, a device dedicated to each of the open air and the mud gun is used.

Although attempts have been made to automate the opening and closure of the exit port by these devices, the final determination of the opening is left to the user of the apparatus, especially since the opening operation is difficult to determine. This is because the shape of the mud material inside the furnace inside the exit port is not constant and the internal state of the mud material filled in the exit port is not uniform.

The mud material to be filled in the exit port is usually consolidated in a convex shape inwardly of the furnace, but the shape thereof differs depending on the inside condition of the exit port cut out by the previous open operation and the amount of the mud material to be charged Therefore, the position of the portion of the mud material adhered to the innermost side of the exit port is not uniform. As a result, it is difficult to perform the open determination on the basis of the depth of the openings of the exit openings, making it difficult to determine the openings. In addition, the filled mud material may have a gap inside thereof, and if the open determination is made based on the forward portion or the rotary load of the feed rod, the advance portion or the rotation load is weakened by the gap, There is a possibility to misjudge.

Thus, in order to facilitate the determination of the opening of the exit opening, it is required to keep the closing state of the exit opening always constant.

As an example of the closure technique of the exit port, for example, a method described in Patent Document 1 is known.

This method is a method in which a mud material is filled in an exit port, a large-diameter hole is pierced to the middle of the mud material during firing of the mud material, and the large-diameter hole is filled with the mud material again.

As another example of the occlusion technique, there is a method described in Patent Document 2.

In this method, the mud material is charged into the exit port, and the mud material is fired by the furnace, and then the open bit is pierced with a thickness necessary to prevent the molten iron from being ejected. Next, the previously formed refractory tubular body is inserted into the cavity and the gap between the inside of the cavity and the outside of the refractory tubular body is filled with the refractory fluid.

The method described in Patent Document 3 is also known. In this method, a solid mud material having a cross-sectional shape slightly larger than the cross-sectional shape of the exit port is formed around the core rod and is filled with the core rod in the exit port.

Japanese Patent Laid-Open Publication No. 1-127612 Japanese Patent Laid-Open No. 8-53703 Japanese Patent Application Laid-Open No. 2003-247011

However, in the methods described in Patent Document 1 and Patent Document 2, since the previously charged mud material is stored in the blast furnace and reaches the opening inside the furnace at the outlet, the required depth of the slit for opening the outlet is not fixed, There is a problem that the opening becomes difficult.

In the method described in Patent Document 3, the core rod is pierced by removing the core rod from the solid mud material. However, when the diameter of the exit port after leaving is smaller than the expected value, the solid mud material and the core rod are forcedly used, It becomes difficult to pull out the core rod at the time of opening.

It is an object of the present invention to provide a closed method of opening an exit port and a closed method of closing the exit port, and a closed method of closing the exit port.

(1) A method for enclosed opening according to the present invention is a method for enclosed opening that closes an exit port formed on the furnace wall and opens the blocked exit port, and a closure cap formed in a substantially rod- A closure step of closing the outlet by firing the mud material after being press-fitted into the precursor; and a pouring step of digging the closure cap and the fired mud material to form the exit port, The stopper has a portion that is formed so as to be more flexible than the sintered material of the mud material so as to be continuous over its entire length.

(2) The closure cap may have a tubular member and a filling member disposed in a channel of the tubular member.

(3) The filling member is a refractory material that is more flexible than the sintered material of the mud material, and the filling member may be excavated during the pouring process.

(4) The filling member is made of a material that becomes a refractory material that is more flexible than the sintered material of the mud material by being fired, and the filling member may be excavated during the above-mentioned pore process.

(5) The filling member may be disposed only on the other end side of the tubular member rather than a position spaced from the one end of the tubular member by a certain distance.

(6) The closure cap may have a length substantially equal to the length of the exit opening.

(7) A closed-type boring apparatus according to the present invention is a closed-type boring apparatus that closes an exit port formed on the furnace wall and opens the closed exit, and has an internal space for accommodating the mud material, A pressure generating portion for applying pressure to the mud material accommodated in the inner space; a detachable portion detachably connected to the block plug formed in a substantially rod shape; A driving portion that moves the closing plug connected to the detachable portion to protrude from the injection opening to the outside of the casing through the through hole and the inner space; , The closed plug and the open air portion for excavating the fired mud material, wherein the closed plug is made of a material having a melting point higher than that of the fired material A portion that is formed has to be continuous throughout their entire length.

(8) The apparatus according to any one of the above items (1) to (5), wherein the open air portion includes a hollow rod which is disposed outside the casing and detachably connected to the detachable portion and which rotates the hollow rod connected to the detachable portion about the axis of the hollow rod And a rotary drive unit.

(9) a guide tube provided in the internal space, one of the openings being disposed in the injection opening so as to be spaced apart from the opening rim of the injection opening, and the other opening being communicated with the through hole And the closure cap may be inserted into the guide tube so long as the movement is guided.

(10) A closure method according to the present invention is a closure method for closure of an exit port formed in a furnace wall of a blast furnace, comprising a press-fitting step of press-fitting and filling a closure cap formed as a mud material and a substantially rod- And a closure step of closing the exit port by firing the ash. The closure cap has a portion of the mud material that is formed so as to be more flexible than the fired material, so as to be continuous over its entire length.

(11) The closure cap may have a tubular member and a filling member disposed in a channel of the tubular member.

(12) The filling member may be a refractory material that is more flexible than the sintered material of the mud material.

(13) The filling member is preferably made of a material which becomes a refractory material that is more flexible than the sintered material of the mud material by being fired.

(14) The filling member may be disposed on the inner side of a position spaced apart from the opening end of the tubular member toward the outside of the blast furnace by a certain distance.

(15) The closing plug may have a length substantially equal to the length of the outlet.

According to the present invention, since the portion of the closure cap which is formed so as to be more flexible than the sintered material of the mud material is continuous over its entire length, the force required for the opening is reduced when the closed outlet is opened, The exit port can be easily opened.

Further, according to the present invention, the following operational effects can be achieved.

(a) The exit port can be easily opened by digging a filling member that is more flexible than the sintered material of the mud material or a fired filling member.

(b) At one end side of the tubular member, the member for digging the filling member can be easily positioned.

(c) Since the length of excavation at the time of opening is almost equal to the length of the closure cap, the exit port can be opened more easily.

(d) The operation of closing the exit port and the operation of opening the closed exit port can be performed by one device.

(e) Mud material is prevented from adhering to the closure cap in the casing. This makes it difficult for frictional force generated by the closure cap and the mud material to occur in the casing at the time of closure, so that the closure cap can be easily inserted into the exit port.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view (partial cross-section) in a closed mode of a closed-type boring device according to a first embodiment of the present invention. FIG.
Fig. 2 is a side view (partial cross-section) when the closed-type porous apparatus is in the open mode.
3 is a cross-sectional view of a connecting portion of a mounting / demounting / rotating mechanism and an opening rod when the closed-looped apparatus is in the open mode.
Fig. 4 is a view for explaining the closed-pore method of the present embodiment.
Fig. 5 is a view for explaining the closed-pore method of this embodiment.
Fig. 6 is a diagram for explaining the closed-pore method of the present embodiment.
7 is a cross-sectional view of a closure cap used in a closed-type porous apparatus according to a second embodiment of the present invention.
8 is a view for explaining a method of opening and closing a closure using the closure plug.
Fig. 9 is a cross-sectional view of a closure cap of a modified example used in the occlusion device of the second embodiment of the present invention. Fig.
Fig. 10 is a view for explaining a method of closing the opening using the closing plug. Fig.
11 is a cross-sectional view of a closed pore device in a modified example of the present invention.

(First Embodiment)

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 6. Fig.

As shown in Fig. 1, the closed system 1 is provided with a closure mode for closing the exit port W2 formed in the furnace wall W1 of the blast furnace W and a closed mode for closing the exit port W2 W2 in the open mode.

1, the closed pore device 1 includes a casing 10 in which an inner space 11 capable of accommodating a mud material 100 is formed and a casing 10 in which a mud material 100 housed in the inner space 11 is provided. (Pressure generating portion) 20 for applying a pressure to an opening of the outlet port W2 and an opening rod 30 (see Fig. 2) for opening the outlet W2 and a closing plug 110 A detachable / rotatable portion (detachable portion, rotating drive portion) 35 for rotating the closing plug 110 and the like as well as a forward / backward driving portion 45 for moving the detachable / rotating portion 35.

Further, the open air 30 is constituted by the opening rod 30 and the attaching / detaching / rotating part 35.

The casing 10 has a nozzle 12 formed with an injection opening 12a and a substantially cylindrical barrel 13 disposed on the base end side of the nozzle 12 and provided with a through hole 13a. The injection opening 12a and the through hole 13a communicate with the inner space 11 formed when the nozzle 12 and the barrel 13 are connected to each other.

The hydraulic pressure generating portion 20 is mounted on the base end side of the casing 10. The hydraulic pressure generating portion 20 has a hydraulic cylinder 21 to which oil is supplied from an oil supply source not shown and a piston 22 which moves in the forward and backward directions by the hydraulic cylinder 21. [ The hydraulic cylinder 21 is provided with an inlet and an outlet, not shown, for regulating the amount of oil in the hydraulic cylinder 21.

A seal member (not shown) for maintaining watertightness between the piston 22 and the hydraulic cylinder 21 is provided between the outer circumferential surface of the piston 22 and the inner circumferential surface of the hydraulic cylinder 21. [ The injection opening 12a and the through hole 13a are arranged in front of the piston 22 even when the piston 22 is moved toward the tip side by the hydraulic cylinder 21. [

In this embodiment, since the piston 22 does not block the injection opening 12a and the through hole 13a, the closure cap 110 and the mud material 100 are passed through the piston 22 and the hydraulic cylinder 21 Holes are not formed.

As shown in Fig. 2, the opening rod 30 is formed into an elongated rod shape. A bit 31 for excavating the furnace wall W1 and the like is provided at the tip of the opening rod 30. [ A female threaded portion 32 as shown in Fig. 3 is formed at the base end of the opening rod 30. In this example, the porous rod 30 is disposed outside the casing 10 and used.

1, the closure cap 110 used in the closed-type porous apparatus 1 of the present embodiment is made of a material that is more flexible than the fired material of the mud material 100 (the fired mud material 100A described later) And is formed in a substantially rod shape by a refractory. The length of the closure cap 110 is set to be substantially equal to the length of the exit opening W2.

The closure cap 110 is formed of a refractory material obtained by firing a mud material made of, for example, alumina, pyrophyllite, silicon carbide, refractory clay, or the like. In order to make the closure cap 110 flexible, for example, the content of the binder (tar, resin) in the muddy material may be increased. In order to make the closure cap 110 hard, The content can be increased.

A not-shown female threaded portion such as the female threaded portion 32 of the above-described opening rod 30 is formed at the proximal end of the closure cap 110.

The attaching / detaching / rotating unit 35 has a detachable / rotating mechanism 36 and a detachable adapter 37 connected to the attaching / detaching / rotating mechanism 36.

The attaching / detaching mechanism 36 includes a male screw portion 38 shown in Fig. 3 and a rotation drive motor (not shown). The opening rod 30 can be connected to the attaching / detaching / rotating mechanism 36 by screwing the female threaded portion 32 of the opening rod 30 to the male screw portion 38.

The rotation drive motor rotates the male screw portion 38 around the axis C1 of the male screw portion 38. [ Thus, the opening rod 30 connected to the male screw portion 38 of the attaching / detaching / rotating mechanism 36 can rotate around its own axis.

The attaching / detaching adapter 37 has a gear box (not shown) and a connecting shaft 39. The gear box is coupled to the male threaded portion 38 of the attaching and detaching and rotating mechanism 36 and the connecting shaft 39 is rotated around the axis line C2 by connecting the attaching / detaching adapter 37 to the attaching / .

An unillustrated male threaded portion is screwed to the female threaded portion of the closure cap 110 at the distal end of the connecting shaft 39. The axis C2 of the connecting shaft 39 and the axis C1 of the male screw portion 38 are set substantially parallel. In this example, the axis C1 is disposed below the injection opening 12a and the through hole 13a.

A guide rail 51 and a position adjusting device 52, which extend in the direction of the axis C2, are mounted on the lower portion of the casing 10. [

The advancing / retreating drive unit 45 includes a forward / backward driving motor 45a provided on the guide rail 51 and a forward / backward driving unit main body 45b slidably connected to the lower portion of the guide rail 51 in the direction of the axis C2 have. Driving the forward / backward driving motor main body 45b in the direction of the axis C2 along the guide rails 51 by driving the forward / backward driving motor 45a.

The closing plug 110 is connected to the male screw portion of the connecting shaft 39 and the closing plug 110 is moved to the front end side by the advancing and retreating driving portion 45 so that the closing plug 110 is inserted into the through hole 13a and the inner space Can be projected forward from the injection opening (12a) through the opening (11).

The position adjusting device 52 is disposed on the bottom surface W3 and can adjust the positions of the casing 10 in the front-rear direction and the vertical direction with respect to the bottom surface W3.

In the closed mode shown in Fig. 1, the casing 10 is moved downward rather than the opening mode shown in Fig. 2 to perform the operation.

In the opening mode, the stopper member 53 for blocking the through hole 13a may be used.

Next, the closed pore method of the present embodiment, which is performed using the closed pore apparatus 1 configured as described above, will be described.

1, an exit port W2 is formed in the furnace wall W1, and the exit port W2 is closed by the closed-loop device 1 in the closed mode, Is performed. In this state, the hot molten wire W5 in the blast furnace W flows out to the outside of the furnace D1.

First, the closing plug 110 is inserted into the through hole 13a of the casing 10 (closing plug arranging step).

Specifically, after moving the advancing / retracting drive portion main body 45b of the advancing / retreating driving portion 45 toward the proximal end side on the guide rail 51 and attaching / detaching the adapter 37 to the attaching / detaching / rotating mechanism 36, 39 are connected to each other. At this time, the closing plug 110 is held in front of the connecting shaft 39 and the connecting shaft 39 is rotated about the axis C2 with respect to the closing plug 110 by the attaching / detaching / rotating mechanism 36. This makes it possible to easily connect the closure cap 110 to the connection shaft 39 by screwing the female threaded portion of the closure cap 110 and the male threaded portion of the connection shaft 39.

The closure cap 110 is moved toward the distal end side by the advancing / retreating drive unit 45 so that the tip end of the closure cap 110 passes through the through hole 13a and is adjusted so as to substantially coincide with the injection opening 12a.

Next, the outlet W2 of the furnace wall W1 is communicated with the inlet opening 12a of the casing 10 (communication arranging step).

This is done by adjusting the positions of the casing 10 in the front-rear direction and the vertical direction by the position adjusting device 52. [ Subsequently, as shown in Fig. 4, the mud material 100 is press-fitted into the outlet port W2 through the inlet port 12a by the hydraulic pressure generating section 20, (Mud material pressing-in step).

Subsequently, as shown in Fig. 5, the closure cap 110 is press-fitted into the exit port W2 through the injection opening 12a of the casing 10 (closed plug-press fitting step).

The mud material 100 extruded from the exit port W2 is raised in a convex manner to the furnace inner side D2 by the closure cap 110 press-fitted into the exit port W2 to form the protective mud 101 . The protective mud 101 protects the furnace wall W1 from being eroded by the charcoal W5 flowing out from the outlet W2.

The casing 10 is moved to the proximal end side by the position adjusting device 52 and the casing 10 is moved from the exit port W2 to the casing 10 (Sintering process).

Between these steps, the mud material 100 is fired by the heat of the molten iron W5, resulting in the fired mud material 100A shown in Fig.

Thus, the occlusion process is terminated.

In this state, when the blast furnace W is operated for a predetermined time and the charcoal W5 is taken out again, the following open process is carried out.

In the opening process, the attaching / detaching adapter 37 is removed from the attaching / detaching / rotating mechanism 36 and the opening rod 30 is connected to the attaching / detaching / rotating mechanism 36 as shown in Fig.

The casing 10 is moved upward by the position adjusting device 52 to bring the bit 31 of the opening rod 30 into contact with the closure cap 110 that closes the outlet W2. The closing rod 110 and the closing plug 110 can be moved by moving the opening rod 30 toward the distal end side by the advancing and retracting driving part 45 while rotating the opening rod 30 around the axis line C1 by the attaching / , The fired mud material 100A on the innermost side D2 is excavated to form an exit port W2.

Thus, the opening process is completed.

As described above, according to the closed pore forming apparatus 1 and the closed pore forming method of the present embodiment, since the closed plug 110 is formed of a refractory material that is smoother than the fired mood material 100A, The force required for the piercing operation is reduced by digging the piercing hole 110 to open the exit port W2.

Since the fired mud material 100A is harder than the occluding plug 110 and is hardly eroded by the molten iron W5 or the like, it is possible to prevent the exit port W2 from being eroded and enlarged by the molten iron W5.

The length of the closure cap 110 is set to be substantially equal to the length of the exit port W2. Therefore, the length of the excavation in the opening process becomes almost equal to the length of the closure cap 110, and the flexible member is excavated in the opening process, so that the exit port W2 can be opened more easily.

Since the closed-loop apparatus 1 includes the opening rod 30 and the attaching / detaching / rotating section 35, it is possible to perform both the closing process and the opening process with one apparatus by switching the closing mode and the opening mode.

Even if the opening rod 30 is bent by the heat of the molten iron W5 or the like because the opening rod 30 is disposed outside the casing 10 in the opening process, Is prevented.

(Second Embodiment)

Next, a second embodiment of the present invention will be described with reference to Figs. 7 to 10. Fig. The same reference numerals are given to the same parts as in the above-described embodiment, and a description thereof will be omitted, and only different points will be described.

7, the closure cap 120 used in the closed-type porous apparatus 1 of the present embodiment has a pipe (tubular member) 121 whose outer diameter is set smaller than the inner diameter of the exit port W2, And a filling member 122 disposed in a pipe of the pipe 121.

As a material for forming the pipe 121, for example, a metal such as steel can be used. The filling member 122 is formed of the same material as the closure cap 110 described above.

It is preferable that a base end portion of the closure cap 120 is formed with a female threaded portion having the same shape as the female threaded portion of the closure cap 110. [

Next, the closed pore method of the present embodiment, which is performed using the closed plug 120 and the closed pore apparatus 1 constructed as described above, will be described.

The closure step is the same as the process of the first embodiment using the closure cap 110, and therefore the description thereof will be omitted.

8, the bit 31 of the opening rod 30 is brought into contact with the filling member 122 of the closure cap 120 which closes the outlet W2. The firing member 122 of the closure cap 120 and the fired member 100A located on the innermost side D2 of the filling member 122 are excavated to form an exit port W2.

According to the closed-pore method of the present embodiment using the closure cap 120 constructed as described above, the exit port W2 can be easily opened by digging the filling member 122 which is more flexible than the fired mud material 100A .

The portion of the closure cap 120 that is more flexible than the fired mast 100A is formed to be continuous over the entire length of the closure cap 120 as in this embodiment. Further, in the opening process, the outlet port W2 can be easily opened by digging the flexible portion formed by the opening rod 30 over the entire length of the closure cap 120. [

As a result, like the closure cap 110 of the first embodiment, the entire closure cap 110 may be formed in a flexible manner, and a part of the outer periphery of the closure cap may be formed to be flexible over the entire length.

In the present embodiment, instead of the closure cap 120, the closure cap 130 shown in Fig. 9 may be used.

The closing plug 130 is configured such that the filling member 122 of the closing plug 120 is connected to the other end 121a of the pipe 121 at a position P spaced from the one end 121a of the pipe 121 by a predetermined distance, (121b) side. This predetermined distance is appropriately set in accordance with the size of the bit 31 in the occluding apparatus 1 and the like.

It is preferable that an inner thread portion having the same shape as the female threaded portion of the closure cap 110 is formed on the inner peripheral surface of the one end 121a side of the pipe 121. [

The closure step of the closure opening method performed using the closure cap 130 of the modified example thus configured is the same as the closure step of this embodiment. The opening process is as follows.

10, the bit 31 of the closed-loop apparatus 1 is inserted into the one end 121a of the pipe 121 of the closed plug 130, and the bit 31 of the closed- And rotates the rod 30 about its axis. Thereby, the fired mud material 100A located on the innermost side D2 of the filling member 122 and the filling member 122 is excavated to form the exit port W2.

When the outflow opening W2 is opened in the portion closed by using the closure cap 120 as in the present embodiment, until the concave portion is formed in the filling member 122 on the outside of the furnace D2, A worker uses the metal rod or the like to restrain the position of the tip of the opening rod 30 because the tip of the opening rod 30 rotates.

In contrast, by using the closure cap 130 of the present modification, the tip of the opening rod 30 can be easily positioned with respect to the closure cap 130, and the rotation of the opening rod 30 can be suppressed. Thus, the exit opening W2 can be formed in a short time.

Although the first embodiment and the second embodiment of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and it is possible to change the configuration within the range not departing from the gist of the present invention And the like. Further, each of the structures shown in the embodiments can be appropriately used in combination.

For example, in the first embodiment and the second embodiment, the filling plug 122 of the closure cap 110 and the closure cap 120 is formed of a fired refractory material that is more flexible than the fired mast material 100A Respectively.

However, they may be formed of a material which becomes a refractory material that is more flexible than the fired mud material 100A after being fired. As the material, the above-mentioned alumina, pyrophyllite, silicon carbide, refractory clay, and mixtures thereof can be used.

By forming the closure cap 110 and the filling member 122 with these materials, the fired closure cap 110 or the filling member 122 can be excavated and the exit port W2 can be easily opened.

11, the closed-loop machine 2 may include a guide tube 61 provided in the inner space 11 of the casing 10 (see FIG. 11) .

One end portion 61a of the guide pipe 61 is disposed in the injection opening 12a of the casing 10 in a state of being spaced apart from the opening edge portion forming the injection opening 12a. The guide tube 61 is disposed such that the opening on the side of the other end 61b is communicated with the through hole 13a. The inner diameter of the guide pipe 61 is set so that the closure cap 110 can be inserted and penetrated.

This configuration of the closed-loop apparatus 2 makes it difficult for frictional force generated by the closure cap 110 and the mud material 100 to occur in the casing 10 in the closed mode, The cap 110 can be easily inserted.

In the first and second embodiments, the open air portion is composed of the opening rod 30 and the attaching / detaching / rotating portion 35, and is integrally formed in the closed-loop machine 1. [ However, it is also possible to use a known piercing rod or the like as the piercing base portion without providing the open air portion in the closed piercing device.

In the first and second embodiments, the length of the closure cap is set to be substantially equal to the length of the exit port W2. However, there is no limitation on the length of the closure cap, and the closure cap can be appropriately set to be shorter than the length of the exit opening W2.

In the occlusion apparatus 1 according to the first and second embodiments, the closure cap 110 is not pressed into the exit port W2 and the exit port W2 is pressed into the mud material 100, It is possible to close the exit opening W2 in the same manner as in the related art. In other words, the closed system 1 of the present invention is a method of closing the exit port W2 by using the mud material 100 and the closure cap 110 and a method of closing the exit port W2 using only the mud material 100, Can be switched and used.

The present invention relates to a method for closing an opening formed in a wall of a blast furnace and closing the exit port formed in the furnace wall, the method comprising the steps of: filling a mud material and a block cap formed in a substantially rod- A closure step of closing the exit port by firing the mud material; and a boring process of digging the closed plug and the fired mud material to form the exit port, The present invention relates to a closed-pore method in which a portion that is more flexible is formed to be continuous over its entire length. According to the present invention, since the portion of the closure cap which is formed so as to be more flexible than the sintered material of the mud material is continuous over its entire length, the force required for the opening is reduced when the closed outlet is opened, The exit port can be easily opened.

1, 2: Closed Opening Device
10: Casing
11: Internal space
12a: injection opening
13a: Through hole
20: Hydraulic pressure generating part (pressure generating part)
30: Opening rod
35: detachable / rotating portion (detachable portion, rotary drive portion)
45:
61: guide tube
100: Mud material
110, 120, 130: Closure plug
121: pipe (tubular member)
122: Charging member
W: Blast furnace
W1: Roof wall
W2: Outpost

Claims (15)

The method of claim 1, further comprising the step of closing the exit port formed on the wall of the blast furnace,
A closure step of pressing and filling a closure cap formed in a substantially rod shape into the exit port and then firing the closure material to close the exit port;
And an opening step of digging the closed plug and the fired mud material to form the exit port,
Wherein the closure cap has a portion that is formed so as to be more flexible than a sintered material of the mud material so as to be continuous over its entire length. The apparatus according to claim 1,
A tubular member,
And a filling member disposed in a channel of the tubular member. 3. The method according to claim 2, wherein the filling member is a refractory material that is more flexible than a sintered material of the mud material,
Wherein the filling member is excavated during the opening process. The mud material according to claim 2, wherein the filling member is made of a material which becomes a refractory material that is more flexible than the baked material of the mud material by being baked,
Wherein the filling member is excavated during the opening process. The method according to any one of claims 2 to 4, wherein the filling member is disposed only at the other end side of the tubular member at a position spaced apart from the one end of the tubular member by a certain distance. The method according to any one of claims 1 to 5, wherein the closure cap has a length substantially equal to a length of the exit port. A closed-loop device for closing an exit port formed on a furnace wall of a furnace and opening the exit port closed,
A casing having an inner space in which the mud material is accommodated and formed with an injection opening and a through hole communicating with the inner space;
A pressure generating unit for applying pressure to the mud material accommodated in the inner space,
A detachable portion detachably connected to the closure cap formed in a substantially bar shape,
A driving unit for moving the closure cap connected to the detachable unit to protrude from the injection opening through the through hole and the internal space to the outside of the casing;
And an open air portion for closing the exit port after the closure of the exit port and for digging the closed mud material and the fired mud material,
Wherein the closure cap has a portion continuously formed over its entire length so as to be formed so as to be more flexible than the fired material of the mud material. 8. The air conditioner according to claim 7,
An opening rod which is disposed outside the casing and detachably connected to the detachable portion,
And a rotation driving portion for rotating the opening rod connected to the detachable portion around the axis of the opening rod. The injection apparatus according to claim 7 or 8, wherein the injection port is provided in the inner space, and one of the openings is disposed in the injection opening so as to be spaced apart from the opening rim of the injection opening, And a guide tube communicating with the guide tube,
Wherein the closure cap is inserted in the guide tube and guided in the movement. An obstruction method for closing an exit port formed in a furnace wall of a blast furnace,
A press-fitting step of press-fitting and filling a closure cap formed in a substantially rod shape into the outlet,
And a closure step of firing the mud material to close the exit port,
The closure cap
Wherein the portion of the mud material that is formed so as to be more flexible than the fired material is continuous over its entire length. 11. The apparatus according to claim 10,
A tubular member,
And a filling member disposed in a channel of the tubular member. The closure method according to claim 11, wherein the filling member is a refractory material that is more flexible than a fired material of the mud material. 12. The closure method according to claim 11, wherein the filling member is made of a material which becomes a refractory material that is more flexible than a sintered material of the mud material by being fired. The closing method according to any one of claims 11 to 13, wherein the filling member is disposed inside the position spaced from the opening end of the tubular member toward the outside of the blast furnace by a certain distance. 15. The closure method according to any one of claims 10 to 14, wherein the closure cap has a length substantially equal to a length of the exit port.

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