JP2013072102A - Blocking/opening method and blocking/opening apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blocking/opening method by which a tap hole is blocked and also the blocked tap hole can be easily opened.SOLUTION: The blocking/opening method is provided by which a tap hole W2 formed on a furnace wall W1 of a blast furnace W is blocked and also the blocked tap hole is opened. The method includes: a blocking step of blocking the tap hole by pushing a mud material 100 and a substantially bar-shaped blocking plug into the tap hole and baking the mud material; and an opening step of forming the tap hole by excavating the blocking plug and the baked mud material. The blocking plug has a portion, which is formed to be softer than the baked mud material, extending over the entire length thereof.

Description

  The present invention relates to a closing opening method and a closing opening device for closing an opening formed in a furnace wall of a blast furnace and opening the closed opening.

  In a blast furnace, which is one of the iron making facilities, pig iron is taken out by reducing oxygen contained in iron ore. The hot metal (molten pig iron) collected in the hot water pool at the bottom of the blast furnace is taken out from a tap outlet provided on the furnace wall beside the hot water pool. The taphole is closed by filling and firing a clay-like refractory called mud material. To remove hot metal, use a pneumatic or hydraulic opening machine to open and close the plugging material filled in the spout by moving the conical rod back and forth, hitting, and rotating. Is done. After the hot metal is taken out from the hot water reservoir, a mud gun is used to fill the mud material into the spout and fire it to close the spout. As described above, the opening and closing operations of the tap holes are performed using dedicated devices such as a hole opening machine and a mud gun, respectively.

Although attempts to automate the opening and closing work of the spout with these devices have been attempted, it is difficult for the user of the device to make a final determination of the opening because it is particularly difficult to determine the opening. It is entrusted. This is due to the fact that the shape of the mud material inside the furnace at the tap outlet is not constant, and the internal state of the mud material filled in the tap outlet is non-uniform. The mud material filled in the tap is usually consolidated in a convex state on the inside of the furnace, but the state of the inside of the furnace at the tap and the mud filled Since the shape differs depending on the amount, the position inside the furnace is not uniform among the mud materials adhering to the furnace inside of the tap outlet. For this reason, it is difficult to make a hole determination based on the drilling depth of the tap hole, and the hole determination is difficult.
In addition, the filled mud material may have a gap in its interior, and if the hole detection is performed based on the forward load or rotational load of the conical rod, the forward load or rotational load will be weakened by the gap, and the spout will be opened. There is a risk of misjudging that has penetrated.
Thus, in order to facilitate the determination of the opening of the tap opening, it is required to always keep the closing state of the tap opening constant.

  As an example of the taphole closing technique, for example, a blast furnace outlet closing method described in Patent Document 1 is known. This closing method is a method in which a mud material is filled into a spout, a large-diameter hole is dug to the middle of the mud material during firing of the mud material, and the large-diameter hole is filled again with the mud material. According to this closing method, the filling density of the mud material at the spout can be improved by the mud material filled later.

As another example of the closing technique, there is a blast furnace outlet forming method described in Patent Document 2. In this forming method, after the mud material is filled in the spout and the mud material is baked by furnace heat, the hole is drilled, leaving a thickness necessary to prevent hot metal ejection, An appropriate amount of a flowable refractory is injected into the opening, and a previously formed and solidified refractory cylindrical body is inserted into the opening, and the fluid refractory is inserted into the gap between the inside of the opening and the outside of the refractory tubular body. It is a method of filling.
According to this forming method, the time required for opening can be shortened because the inside of the refractory cylinder is hollow. Further, since the refractory cylindrical body is inserted after opening the fired mud material, a small insertion force is required, and it can be inserted with the feed force of a conventional tap hole opening machine.

  As a method of making the drilling depth required to open the tap hole constant, a method for opening and closing the metallurgical furnace tap port described in Patent Document 3 is known. In this method, a solid mud material formed in a column shape with a cross-sectional shape slightly larger than the cross-sectional shape of the spout opening around the core bar is driven and closed together with the core bar, and the core bar is pulled out to open the hole. .

Japanese Patent Laid-Open No. 1-127612 JP-A-8-53703 Japanese Patent Laid-Open No. 2003-247011

However, in the methods described in Patent Document 1 and Patent Document 2, since the previously filled mud material has accumulated in the blast furnace and has reached the opening inside the furnace of the tap hole, in order to open the tap hole There is a problem that the required drilling depth is not constant, making it difficult to open.
In addition, in the method described in Patent Document 3, when the diameter of the spout after the spout is smaller than expected, the solid mud material and the cored bar are forcibly driven, and the cored bar is difficult to pull out at the time of opening. End up.

  The present invention has been made in view of such problems, and is a closed opening method and closed opening device capable of closing an exit opening and easily opening the closed exit opening. The purpose is to provide.

In order to solve the above problems, the present invention proposes the following means.
The closed-opening method of the present invention is a closed-open method that closes the tap opening formed on the furnace wall of the blast furnace and opens the closed tap opening, which is formed into a mud material and a substantially rod shape. A plugging step for extruding the closed plug to the tap hole and firing the mud material to block the plug; and an opening step for excavating the plug plug and the burned mud material to form the tap port; The closure plug has a portion formed so as to be softer than the fired product of the mud material so as to continue over its entire length.

  Further, the closed opening device of the present invention is a closed opening device that closes the tap opening formed in the furnace wall of the blast furnace and opens the closed tap opening, and can accommodate mud material. Internal space, a casing in which an injection opening and a through-hole communicating with the internal space are formed, a pressure generating portion that applies pressure to the mud material accommodated in the internal space, and a plug substantially formed in a rod shape An attachment / detachment portion detachably connected to the proximal end of the detachable portion, an advance / retreat drive portion for moving the closure plug connected to the attachment / detachment portion so as to protrude from the injection opening through the through hole and the internal space, An opening machine portion for excavating the fired mud material, and the obturator plug has a portion formed softer than the fired product of the mud material. It runs over the entire length of It is characterized in that it has to cormorants.

Moreover, in the above-described closing method, it is more preferable that the closing plug has a tubular member and a filling member disposed in a pipe line of the tubular member.
Further, in the above-described closing hole opening method, the filling member is formed of a fired refractory material softer than the fired product of the mud material, and the opening member includes excavating the filling member of the closing plug. preferable.

Further, in the above-described closed hole opening method, the filling member is formed of a material that becomes a refractory material softer than the fired product of the mud material by being fired, and in the opening step, the filling member of the closing plug is formed. It is more preferable to excavate.
In the above-described closed hole opening method, it is more preferable that the filling member is disposed only on the other end side of the tubular member from a position spaced apart from the one end of the tubular member by a certain distance.
Further, in the above-described closing method, it is more preferable that the length of the closing plug is set to be substantially equal to the length of the tap hole.

Further, in the above-described closed hole opening device, the hole opening machine portion is disposed outside the casing, and an opening rod whose base end is detachably connected to the attachment / detachment portion, and the attachment / detachment portion It is more preferable to have a rotation drive unit that rotates the aperture rod connected to the aperture rod about the axis of the aperture rod.
Further, in the above-described closed hole opening device, the one end is provided in the inner space of the casing, and one end thereof is disposed in a state of being separated from at least a part of an edge portion forming the injection opening in the injection opening of the casing, More preferably, the opening on the other end side includes a guide tube communicating with the through hole, and the blocking plug is set to be insertable into the guide tube.

In the present invention, according to the closing hole opening method according to claim 1 and the closing hole opening device according to claim 7, the closing plug has a portion formed softer than the fired product of the mud material. It has so that it may continue over. For this reason, when opening a closed outlet, the force required for opening is reduced by excavating and opening a part of this closing stopper, and the outlet is easily opened. Can do.
According to the closed hole opening method according to the third and fourth aspects, the tap hole can be easily opened by excavating a filling member softer than the fired product of the mud material or the fired filling member.

According to the closed hole opening method of the fifth aspect, the member for excavating the filling member can be easily positioned on one end side of the tubular member.
According to the closed hole opening method of the sixth aspect, since the length of excavation at the time of opening is substantially equal to the length of the closed plug, the tap hole can be opened more easily.
According to the blocking opening device of the eighth aspect, the operation of closing the tap opening and the operation of opening the blocked tap opening can be performed by a single device.
According to the block opening device of the ninth aspect, the mud material is prevented from adhering to the block plug in the casing. For this reason, since it becomes difficult to produce the frictional force by the obstruction | occlusion stopper and a mud material in a casing at the time of obstruction | occlusion, an obstruction | occlusion stopper can be easily inserted in an outlet.

It is the side view which fractured | ruptured a part when the obstruction | occlusion hole opening apparatus of 1st Embodiment of this invention is obstruction | occlusion mode. It is the side view which fractured | ruptured a part when the obstruction | occlusion opening apparatus is an opening mode. It is sectional drawing of the connection part of the attachment / detachment / rotation mechanism and aperture rod when the obstruction | occlusion aperture device is in aperture mode. It is a figure explaining the obstruction | occlusion opening method of this embodiment. It is a figure explaining the obstruction | occlusion opening method of this embodiment. It is a figure explaining the obstruction | occlusion opening method of this embodiment. It is sectional drawing of the side surface of the obstruction | occlusion stopper used with the obstruction | occlusion opening apparatus of 2nd Embodiment of this invention. It is a figure explaining the obstruction | occlusion hole opening method using the obstruction | occlusion stopper. It is sectional drawing of the side surface of the obstruction | occlusion stopper of the modification used with the obstruction | occlusion hole opening apparatus of 2nd Embodiment of this invention. It is a figure explaining the obstruction | occlusion hole opening method using the obstruction | occlusion stopper. It is sectional drawing of the side surface of the obstruction | occlusion hole opening apparatus in the modification of this invention.

(First embodiment)
Hereinafter, a first embodiment of a closed hole opening device according to the present invention will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, the closed hole opening device 1 opens a closing mode for closing a tap outlet W2 formed in the furnace wall W1 of the blast furnace W, and a closed tap outlet W2 as shown in FIG. The state of the apparatus can be switched to a hole opening mode.
As shown in FIG. 1, the block opening device 1 includes a casing 10 in which an internal space 11 in which the mud material 100 can be accommodated and a hydraulic pressure generating unit that applies pressure to the mud material 100 accommodated in the internal space 11. (Pressure generating part) 20, an opening rod 30 for opening the tap hole W 2 (see FIG. 2), a detachable connection to the proximal end of the closing plug 110, and the closing plug 110 and the like. An attachment / detachment / rotation unit (attachment / removal unit, rotation drive unit) 35 to be rotated and an advance / retreat drive unit 45 to move the attachment / detachment / rotation unit 35 are provided.
The aperture rod 30 and the attachment / detachment / rotation unit 35 constitute an aperture machine unit.

The casing 10 has a nozzle 12 that is arranged on the distal end side and has an injection opening 12a, and a substantially cylindrical barrel 13 that is arranged on the proximal end side and has a through hole 13a. The injection opening 12a and the through hole 13a communicate with the internal space 11 formed when the nozzle 12 and the barrel 13 are connected.
The hydraulic pressure generator 20 is attached to the proximal end side in the internal space 11 of the casing 10. The hydraulic pressure generator 20 includes a hydraulic cylinder 21 that is supplied with oil from an oil supply source (not shown), and a piston 22 that is moved in the front-rear direction by the hydraulic cylinder 21. The hydraulic cylinder 21 is provided with an inlet (not shown) and an outlet that adjust the amount of oil in the hydraulic cylinder 21.
A seal member (not shown) is provided between the outer peripheral surface of the piston 22 and the inner peripheral surface of the hydraulic cylinder 21 to keep the space between the piston 22 and the hydraulic cylinder 21 watertight. Even when the piston 22 is moved to the distal end side by the hydraulic cylinder 21, the injection opening 12a and the through hole 13a are set in front of the piston 22. In the present embodiment, since the piston 22 does not block the injection opening 12a and the through hole 13a, a hole for allowing the blocking plug 110 and the mud material 100 to pass through the piston 22 and the hydraulic cylinder 21 is not formed.

As shown in FIG. 2, the aperture rod 30 is formed in an elongated rod shape. A bit 31 for excavating the furnace wall W1 and the like is provided at the tip of the aperture rod 30. A female thread portion 32 as shown in FIG. 3 is formed at the proximal end of the aperture rod 30. In this example, the aperture rod 30 is disposed and used outside the casing 10.
As shown in FIG. 1, the closing plug 110 used in the closing hole opening device 1 of the present embodiment is formed into a substantially rod shape by a fired refractory softer than a fired product of the mud material 100 (fired mud material 100A described later). Is formed. The length of the blocking plug 110 is set to be approximately equal to the length of the tap hole W2. The closing plug 110 is formed of a refractory material obtained by firing a mud material made of alumina, wax, silicon carbide, refractory clay, or the like. In order to soften the obturator plug 110, for example, the content of the binder (tar, resin) in the mud material may be increased. To harden the obturator plug 110, the content of the metal (such as aluminum) in the mud material. You can increase it.
A female screw portion (not shown) such as the female screw portion 32 of the aperture rod 30 described above is formed at the proximal end of the closing plug 110.

The attachment / detachment / rotation unit 35 includes an attachment / detachment / rotation mechanism 36 and an attachment / detachment adapter 37 connected to the attachment / detachment / rotation mechanism 36.
The attachment / detachment / rotation mechanism 36 includes a male screw portion 38 shown in FIG. 3 and a rotation drive motor (not shown). The aperture rod 30 can be connected to the attachment / detachment / rotation mechanism 36 by screwing the female thread portion 32 of the aperture rod 30 into the male thread portion 38. The rotation drive motor rotates the male screw portion 38 around the axis C1 of the male screw portion 38. Thereby, the aperture rod 30 connected to the external thread part 38 of the attachment / detachment / rotation mechanism 36 can rotate around its own axis.
The detachable adapter 37 has a gear box (not shown) and a connecting shaft 39. By connecting the attachment / detachment adapter 37 to the attachment / detachment / rotation mechanism 36, the gear box is engaged with the male screw portion 38 of the attachment / detachment / rotation mechanism 36, and the connecting shaft 39 can be rotated around the axis C2.
A male screw portion (not shown) that is screwed with the female screw portion of the closing plug 110 is formed at the tip 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 extending in the direction of the axis C2 and a position adjusting device 52 are attached to the lower part of the casing 10.
The advance / retreat drive unit 45 includes an advance / retreat drive motor 45a installed on the guide rail 51, and an advance / retreat drive unit main body 45b connected to the lower part of the guide rail 51 so as to be slidable in the direction of the axis C2. By driving the advance / retreat drive motor 45a, the advance / retreat drive section main body 45b can be advanced and retracted along the guide rail 51 in the direction of the axis C2.
The obturator plug 110 is connected to the male thread portion of the connecting shaft 39, and the obturator plug 110 is moved to the distal end side by the advance / retreat drive unit 45, whereby the obturator plug 110 is moved forward from the injection opening 12a through the through hole 13a and the internal space 11. Can be protruded.
The position adjusting device 52 is disposed on the floor surface W3, and can adjust the position of the casing 10 in the front-rear direction and the vertical direction with respect to the floor surface W3.

In the closed mode shown in FIG. 1, the casing 10 is moved downward from the opening mode shown in FIG.
In the opening mode, a plug member 53 that closes the through hole 13a may be used.

Next, the closed hole opening method of this embodiment performed using the closed hole opening device 1 configured as described above will be described. In the following, for convenience of explanation, as shown in FIG. 1, as shown in FIG. 1, a closing process is performed in which the tap wall W <b> 2 is formed in the furnace wall W <b> 1 and the tap opening W <b> 2 is closed with the closing hole opening device 1 in the closing mode. I will explain from what to do. In this state, hot hot metal W5 in the blast furnace W flows out to the furnace outer side D1.
First, the blocking plug 110 is inserted through the through hole 13a of the casing 10 (blocking plug placement step). Specifically, the advance / retreat drive unit main body 45b of the advance / retreat drive unit 45 is moved to the proximal end side on the guide rail 51, and the attachment / detachment adapter 37 is connected to the attachment / detachment / rotation mechanism 36. The obturator plug 110 is connected to. At this time, the closing plug 110 is held in front of the connecting shaft 39, and the connecting shaft 39 is rotated around the axis C <b> 2 with respect to the closing plug 110 by the attaching / detaching / rotating mechanism 36. Thereby, the internal thread part of the obstruction | occlusion stopper 110 and the external thread part of the connection shaft 39 can be screwed together, and the obstruction | occlusion stopper 110 can be easily connected to the connection axis | shaft 39.
Then, the closing stopper 110 is moved to the distal end side by the advancing / retreating drive unit 45 and adjusted so that the distal end of the closing stopper 110 passes through the through-hole 13a and substantially coincides with the injection opening 12a.

Next, the tap hole W2 of the furnace wall W1 and the injection opening 12a of the casing 10 are communicated (communication arrangement step). This is performed by adjusting the position 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 hydraulic pressure generating unit 20 pushes the mud material 100 through the pouring opening 12a into the spout W2, and fills the spout W2 with the mud material 100 (a mud material extruding step).

Subsequent to the mud material pushing step, as shown in FIG. 5, the closing plug 110 is pushed out to the spout W2 through the injection opening 12a of the casing 10 (blocking plug pushing step).
Due to the closure plug 110 pushed out to the tap outlet W2, the mud material 100 pushed out from the tap outlet W2 rises to a convex state at the furnace inner side D2, and forms a protective mud 101. The protective mud 101 protects the furnace wall W1 from being eroded by the molten iron W5 flowing out from the outlet W2.
The casing 10 is kept in contact with the tap hole W2 for a certain period of time, and then the casing 10 is moved to the base end side by the position adjusting device 52 to separate the casing 10 from the tap hole W2 (firing step). . During this step, the mud material 100 is baked by the heat of the hot metal W5, resulting in a baked mud material 100A shown in FIG.
This is the end of the closing process.

In this state, when the blast furnace W is operated for a certain period of time and the hot metal W5 is taken out again, a hole forming step described below is performed.
In the opening step, as shown in FIG. 2, the attachment / detachment adapter 37 is removed from the attachment / detachment / rotation mechanism 36, and the opening rod 30 is connected to the attachment / detachment / rotation mechanism 36.
The casing 10 is moved upward by the position adjusting device 52, and the bit 31 of the aperture rod 30 is brought into contact with the closing plug 110 that closes the spout W2. By rotating the aperture rod 30 about the axis C1 by the attaching / detaching / rotating mechanism 36 and moving the aperture rod 30 to the distal end side by the advance / retreat drive unit 45, the obstruction plug 110 and the obstruction plug 110 are moved to the furnace inner side D2. A certain fired mud material 100A is excavated to form a spout W2.
This completes the hole opening step.

As described above, according to the closed hole opening device 1 and the closed hole opening method of the present embodiment, the closed plug 110 is formed of a refractory softer than the fired mud material 100A. For this reason, in the opening step, the force required for the opening operation is reduced by excavating and opening the blocking plug 110, and the tap hole W2 can be easily opened.
Further, the fired mud material 100A is harder than the closing plug 110 and is less likely to be eroded by the hot metal W5 or the like, so that it is possible to prevent the spout W2 from being eroded by the hot metal W5 and becoming larger.

The length of the blocking plug 110 is set to be approximately equal to the length of the spout W2. Since the length of excavation in the opening step is substantially equal to the length of the blocking plug 110 and a soft member is excavated in the opening step, the spout W2 can be opened more easily.
Since the blocking hole opening device 1 includes the hole rod 30 and the attachment / detachment / rotation unit 35, by switching between the blocking mode and the hole opening mode, both the blocking step and the hole opening step are performed with one device. Can do.
Since the opening rod 30 is arranged outside the casing 10 in the opening step, even if the opening rod 30 is bent by the heat of the hot metal W5, it is possible to prevent the obstruction opening device 1 from being obstructed. The

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. 7 to FIG. 10, but the same parts as those in the above-described embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. explain.
As shown in FIG. 7, the closing plug 120 used in the closing device 1 of this embodiment includes a pipe (tubular member) 121 whose outer diameter is set smaller than the inner diameter of the spout W2, and a pipe of the pipe 121. And a filling member 122 disposed in the path.
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 above-described closing plug 110.
In addition, it is preferable that a female screw portion having the same shape as the female screw portion of the blocking plug 110 is formed at the proximal end of the blocking plug 120.

Next, the block opening method of this embodiment performed using the block plug 120 and the block opening apparatus 1 configured as described above will be described.
Since the closing process is the same as the process of the first embodiment performed using the closing plug 110, description thereof is omitted.
In the opening step, as shown in FIG. 8, the bit 31 of the opening rod 30 is brought into contact with the filling member 122 of the closing plug 120 that closes the spout W2. Then, the filling member 122 of the closing plug 120 and the firing mud material 100A located in the furnace inner side D2 from the filling member 122 are excavated to form the spout W2.
According to the block opening method of the present embodiment using the block plug 120 configured as described above, the tap opening W2 can be easily opened by excavating the filling member 122 softer than the fired mud material 100A. Can do.

As in the present embodiment, a portion of the closing plug 120 that is softer than the fired mud material 100 </ b> A is formed so as to be continuous over the entire length of the closing plug 120. In the hole opening step, the tap hole W2 can be easily opened by excavating the softly formed portion with the hole rod 30 over the entire length of the closing plug 120.
For this reason, like the closure plug 110 of 1st Embodiment, the whole closure plug 110 may be formed softly, and a part of outer periphery of the closure plug may be formed softly over the full length.

In this embodiment, instead of the blocking plug 120, a blocking plug 130 shown in FIG. 9 may be used.
In the closing plug 130, the filling member 122 is arranged only on the other end 121 b side of the pipe 121 from the position P at a certain distance from the one end 121 a of the pipe 121. This fixed distance is appropriately set according to the size of the bit 31 in the closing device 1.
A female screw portion having the same shape as the female screw portion of the closing plug 110 is preferably formed on the inner peripheral surface of the pipe 121 on the one end 121a side.

The closing process of the closing hole opening method performed using the closing plug 130 of the modified example configured as described above is the same as the closing process of the present embodiment. On the other hand, the opening process is as follows.
As shown in FIG. 10, the bit 31 of the closing hole device 1 is inserted into one end 121 a of the pipe 121 of the closing plug 130, and the opening rod 30 is rotated around its axis by the attaching / detaching / rotating mechanism 36. As a result, the filling member 122 and the firing mud material 100A located in the furnace inner side D2 from the filling member 122 are excavated to form the spout W2.

When the spout W2 is opened in the portion closed by using the closing plug 120 as in the present embodiment, the tip of the opening rod 30 until the recess is formed in the filling member 122 on the furnace outer side D2. Therefore, the operator restrains the position of the tip of the aperture rod 30 using a metal rod or the like.
On the other hand, by using the closure plug 130 of this modification, the tip of the aperture rod 30 can be easily positioned with respect to the closure plug 130, and rotational blurring of the aperture rod 30 can be suppressed. Thereby, the spout W2 can be formed in a short time.

As mentioned above, although 1st Embodiment and 2nd Embodiment of this invention were explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The structure of the range which does not deviate from the summary of this invention Changes are also included. Furthermore, it goes without saying that the configurations shown in the embodiments can be used in appropriate combinations.
For example, in the first embodiment and the second embodiment, the closing plug 110 and the filling member 122 of the closing plug 120 are formed of a fired refractory softer than the fired mud material 100A. However, these may be formed of a material that becomes a refractory softer than the fired mud material 100A when fired.
As this material, the above-mentioned alumina, wax, silicon carbide, refractory clay, and a mixture thereof can be used.
By forming the closing plug 110 and the filling member 122 with such a material, the fired closing plug 110 or the filling member 122 can be excavated and the spout W2 can be easily opened.

In the first embodiment and the second embodiment, as shown in FIG. 11, the closing hole device 2 may include a guide tube 61 provided in the internal space 11 of the casing 10.
One end 61 a of the guide tube 61 is disposed in a state of being separated from an edge portion that forms the injection opening 12 a in the injection opening 12 a of the casing 10. The guide tube 61 is disposed so that the opening on the other end 61b side communicates with the through hole 13a.
The inner diameter of the guide tube 61 is set so that the closing plug 110 can be inserted.
By configuring the obturator opening device 2 in this manner, in the obstruction mode, frictional force due to the obstruction plug 110 and the mud material 100 is less likely to be generated in the casing 10, so that the obstruction plug 110 can be easily provided at the spout W2. Can be inserted.

In the first embodiment and the second embodiment, the hole-opening machine part is configured by the hole-forming rod 30 and the attachment / detachment / rotation part 35 and is configured integrally with the closing hole-opening device 1. However, the obturator opening device may not be provided with an opening machine part, and a known conical rod or the like may be used as the opening machine part.
In the first embodiment and the second embodiment, the length of the closing plug is set to be approximately equal to the length of the tap hole W2. However, the length of the obturator plug is not limited, and can be set as appropriate, for example, shorter than the length of the spout W2.

  In the closing and opening device 1 of the first and second embodiments, the closing port W2 is closed only by the mud material 100 without pushing out the closing plug 110 to the leaving port W2 in the closing process. The spout W2 can be closed by the same method as in FIG. That is, the closing device 1 of the present invention switches between a method of closing the spout W2 using the mud material 100 and the closing plug 110 and a method of closing the spout W2 using only the mud material 100. Can be used.

DESCRIPTION OF SYMBOLS 1, 2 Closure opening apparatus 10 Casing 11 Internal space 12a Injection opening 13a Through-hole 20 Oil pressure generating part (pressure generating part)
30 Opening rod 35 Detachment / rotation unit (detachment unit, rotation drive unit)
45 Advance / Retreat Drive Unit 61 Guide Tube 100 Mud Material 110, 120, 130 Blocking Plug 121 Pipe (Tubular Member)
122 Filling member W Blast furnace W1 Furnace wall W2

Claims (9)

A closing hole opening method for closing the tap hole formed on the furnace wall of the blast furnace and opening the blocked tap hole,
A plugging step for extruding the plug material formed in the form of a mud material and a substantially rod to the outlet and firing and closing the mud material;
An opening step of excavating the plug and the fired mud material to form the tap hole;
With
The closing plug has a portion formed so as to be softer than the fired product of the mud material so as to continue over its entire length. The plug is
A tubular member;
A filling member disposed in a conduit of the tubular member;
The closed hole opening method according to claim 1, comprising: The filling member is formed of a fired refractory softer than the fired product of the mud material,
3. The closed hole opening method according to claim 2, wherein in the opening step, the filling member of the closed plug is excavated. The filling member is formed of a material that becomes a refractory softer than the fired product of the mud material by being fired,
3. The closed hole opening method according to claim 2, wherein in the opening step, the filling member of the closed plug is excavated.   5. The closed opening according to claim 2, wherein the filling member is disposed only on the other end side of the tubular member from a position spaced apart from the one end of the tubular member by a predetermined distance. 6. Hole method.   The length of the said obstruction | occlusion stopper is set substantially equal to the length of the said tap hole, The obstruction | occlusion hole opening method as described in any one of Claim 1 to 5 characterized by the above-mentioned. A closing and opening device for closing the tap opening formed on the furnace wall of the blast furnace and opening the closed tap opening,
An internal space in which the mud material can be accommodated, a casing in which an injection opening and a through hole communicating with the internal space are formed;
A pressure generating unit that applies pressure to the mud material accommodated in the internal space;
A detachable part detachably connected to the proximal end of the obturator plug formed in a substantially bar shape;
An advancing / retreating drive unit that moves the blocking plug connected to the detachable unit so as to protrude from the injection opening through the through hole and the internal space;
An opening machine for excavating the closing plug and the fired mud material closing the tap hole;
With
The closing plug has a portion formed so as to be softer than the fired product of the mud material so as to continue over its entire length. The opening machine part is
An opening rod that is disposed outside the casing and has a base end that is detachably connected to the detachable portion;
The closed opening device according to claim 7, further comprising: a rotation driving unit that rotates the opening rod connected to the attaching / detaching unit around an axis of the opening rod. Provided in the internal space of the casing, one end is disposed in the injection opening of the casing in a state of being separated from at least a part of the edge forming the injection opening, and the opening on the other end side is formed in the through hole. With a communicating guide tube,
9. The obturator opening device according to claim 7 or 8, wherein the obturator plug is set to be insertable into the guide tube.

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