TW201326407A - Taphole plugging/unplugging method and taphole plugging/unplugging apparatus - Google Patents

Abstract

A taphole plugging/unplugging method includes the steps of: plugging a taphole formed in a wall of a blast furnace, in which a mud material and a plugging member are pushed into the taphole and then the mud material is burned so as to plug the taphole; and unplugging the taphole by digging the burned mud material and the plugging member inside the taphole; wherein the plugging member includes a part which is more tender than the burned mud material and of which the length is the same as that of the plugging member.

Description

Occlusion opening method, occlusion method and occlusion opening device Field of invention

The present invention relates to a clogging method and a clogging apparatus for occluding a taphole formed in a blast furnace wall and opening a clogging taphole, and a clogging method for clogging the taphole.

The present application claims priority from Japanese Patent Application No. 2011-210737, filed on Sep. 27, 2011.

Background of the invention

In the blast furnace which is one of the iron making apparatuses, the pig iron is taken out by reducing the oxygen contained in the iron ore. The molten iron (melted pig iron) accumulated in the sump portion of the blast furnace bottom is taken out from the tap hole of the furnace wall provided beside the hoarding portion. The taphole is occluded by filling and roasting a clay-like refractory called mud. The removal operation of the molten iron is carried out by using a pneumatic or hydraulic type tapping machine to move the taper rod forward, backward, striking, rotating, etc., and to open the closing material filled in the tap hole.

After the molten iron is taken out from the hoarding portion, the mud material is filled in the tap hole with a mud gun, and baked to occlude the iron outlet. As described above, various special devices such as a hole puncher and a mud gun are used in the opening and closing operation of the tap hole.

Although the opening and closing operations of the tap hole by these devices have been attempted to be automated, it is difficult to determine the opening, especially in the drilling operation, so the final determination of the opening is performed by the user of the device. This is the cause The shape of the mud inside the furnace of the tap hole is different, and the internal state of the mud filled in the tap hole is uneven.

The mud filled in the taphole is usually consolidated in the convex state on the inside of the furnace, but its shape may be due to the state of the inside of the taphole after the hole is cut in the previous opening operation or the amount of the filled mud. The difference is that the position of the portion adhering to the innermost side of the furnace is not uniform among the mud adhering to the inside of the furnace of the tap hole. Therefore, it is difficult to determine the opening according to the depth of the tapping of the tap hole, and it is difficult to determine the opening. In addition, the inside of the filled mud sometimes has a void. If the opening is determined based on the forward load or the rotating load of the cone, there is a possibility that the forward load or the rotating load is erroneously determined to be iron. The hole has passed through.

As described above, in order to facilitate the determination of the opening of the tap hole, it is necessary to always keep the closed state of the tap hole at a certain level.

An example of the clogging technique of the tap hole is known, for example, in the method described in Patent Document 1.

The method is a method of filling a taphole toward a taphole, and dig a large-diameter hole to the mud in the roasting process of the mud, and then filling the mud hole in the large-diameter hole.

Further, as another example aspect of the occlusion technique, the method described in Patent Document 2 can also be mentioned.

The method is characterized in that the mud material is filled in the tap hole and the mud is calcined by the furnace, and the hole is drilled by the drill hole by the opening hole, and the necessary thickness for preventing the molten iron from being ejected is left, and then the fluidity is refractory. A proper amount is injected into the opening. Next, the pre-cured refractory cylinder is inserted into the opening, and at the same time A method of filling the fluid refractory with a gap between the inside of the opening and the outside of the refractory cylinder.

Further, the method described in Patent Document 3 is also known. The method is a method in which a solid slurry having a cross-sectional shape slightly larger than a cross-sectional shape of a taphole and formed cylindrically around a metal mandrel is inserted into a taphole together with a metal mandrel to be occluded.

Advanced technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 1-127612

Patent Document 2: Japanese Patent Laid-Open No. Hei 8-53703

Patent Document 3: Japanese Patent Laid-Open Publication No. 2003-247011

Summary of invention

However, in the methods described in Patent Document 1 and Patent Document 2, the previously filled mud is accumulated in the blast furnace to reach the opening of the furnace inner side of the tap hole, so that there is a necessary cutting for opening the tap hole. The hole depth is different, making the opening difficult.

Further, in the method described in Patent Document 3, the opening is performed by pulling the metal core rod away from the solid mud material, but in the case where the tap hole diameter after the tapping is smaller than expected, It is hard to insert the solid mud and the metal mandrel, which makes it difficult to extract the metal mandrel when opening the hole.

The object of the present invention is to provide a method for occluding and occluding a sluice opening which can occlude the tap hole and can easily open the clogging tap hole. The hole device and the occlusion method for occluding the taphole.

(1) The occlusion opening method of the present invention is a method of clogging a taphole formed in a blast furnace wall and opening the clogging said tap hole, which has a occluding step for forming a slurry and forming a rod-shaped occlusion plug is pushed into the tap hole, and the step of roasting the mud to occlude the tap hole; and a step of opening the occlusion plug and the calcined mud to form the aforementioned In the step of the iron mouth, the occlusion plug has a portion formed to be softer than the calcined material of the mud, and the portion continues to the entire length of the occlusion plug itself.

(2) The occlusion stopper may have a tubular member and a filling member disposed in a conduit of the tubular member.

(3) The filling member may be a refractory material which is softer than the calcined material of the mud material, and the filling member may be excavated during the opening step.

(4) The filling member may be composed of a material which is refractory which is softer than the calcined material of the pulverized material after calcination, and the filling member may be digged in the opening step.

(5) The aforementioned filling member may be disposed only at a position spaced apart from one end of the tubular member to the other end side of the tubular member.

(6) The occlusion plug may be almost the same length as the length of the tap hole.

(7) The occlusion opening device of the present invention is a device that occludes the tap hole formed in the furnace wall of the blast furnace and opens the clogging of the tap hole, and has a casing having an internal space for accommodating the mud And forming an injection opening and a through hole communicating with the internal space; the pressure generating portion is configured to The pressure acts on the mud contained in the internal space; the attaching and detaching portion is detachably connected to the plug which is formed in a slightly rod shape; and the driving portion moves the blocking plug connected to the attaching and detaching portion to Opening the outer hole through the through hole and the inner space from the injection opening; and the opening machine portion digs the occlusion that blocks the tap hole after the tap hole is closed In the plug and the calcined slurry, the occluding plug has a portion formed to be softer than the calcined material of the mud, and the portion extends to the entire length of the occluding plug itself.

(8) The opening machine unit may include: a hole opening rod that is disposed outside the casing and detachably connected to the detachable portion; and a rotation driving unit that is connected to the detachable portion The hole rod rotates about the axis of the aforementioned opening rod.

(9) The occlusive opening device of the present invention may have a duct disposed in the internal space, and configured such that an opening is in a state of being separated from an opening edge of the injection opening in the injection opening, and another opening is connected to the through hole The occlusion plug can be inserted into the catheter and guided to move.

(10) The occlusion method of the present invention is a method of occluding a taphole formed in a furnace wall of a blast furnace, comprising: a pushing step of pushing the mud and the occlusion plug formed into a slightly rod shape into the tapping And a occluding step of roasting the mud to occlude the tap hole, the occluding plug having a portion formed to be softer than the calcined material of the mud, and the portion continuing to the occlusion plug itself Full length.

(11) The occlusive plug may have a tubular member and a filling member disposed in a conduit of the tubular member.

(12) The aforementioned filling member may be a refractory which is softer than the calcined material of the aforementioned mud.

(13) The filler member may be composed of a material which is refractory which is softer than the calcined product of the above-mentioned mud after calcination.

(14) The above-described filling member may be disposed in the tubular member at a position further inside than a position facing a certain distance from the open end of the blast furnace outer side.

(15) The occlusion plug may be almost the same length as the length of the tap hole.

According to the present invention, since the occluding plug has a portion which is formed to be softer than the calcined material of the shale, and the portion continues to the entire length of the occluding plug itself, the opening can be reduced when the clogging tap hole is opened The required force can easily open the tap hole.

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

(a) The tap hole can be easily opened by cutting a filling member which is softer than the calcined material of the mud or a filled filling member.

(b) The member for scooping the filling member can be easily positioned in one of the end sides of the tubular member.

(c) The length of the excavation is almost the same as the length of the occlusion plug, so that the tap hole can be opened more easily.

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

(e) The inside of the casing prevents the mud from adhering to the occlusion plug. Therefore, when occluding, it is difficult to generate friction between the plug and the mud in the housing, so Easily insert the occlusion plug into the tap.

1‧‧‧Closed opening device

2‧‧‧Blocking opening device

10‧‧‧shell

11‧‧‧Internal space

12‧‧‧ nozzle

12a‧‧‧Injection opening

13‧‧‧Bowl

13a‧‧‧through hole

20‧‧‧Hydraulic pressure generation unit (pressure generation unit)

21‧‧‧Hydraulic cylinder

22‧‧‧Piston

30‧‧‧Opening rod

31‧‧‧Drill cone

32‧‧‧Threaded Department

35‧‧‧ Loading and unloading. Rotating part (mounting and unloading part, rotary drive part)

36‧‧‧ Loading and unloading. Rotating mechanism

37‧‧‧Loading and unloading adapter

38‧‧‧External thread

39‧‧‧Connected shaft

45‧‧‧Advance and Rescue Drive Department

45a‧‧‧Advance and retraction drive motor

45b‧‧‧Advance and retreat drive unit

51‧‧‧rails

52‧‧‧ Position adjustment device

53‧‧‧Bolt components

61‧‧‧ catheter

61a‧‧‧End

61b‧‧‧End

100‧‧‧mud

100A‧‧‧Roasting mud

101‧‧‧Protective mud

110‧‧‧Closed plug

120‧‧‧Closed plug

121‧‧‧ tube

121a‧‧‧End

121b‧‧‧ one end

122‧‧‧Filling components

130‧‧‧Closed plug

C1‧‧‧ axis

C2‧‧‧ axis

D1‧‧‧ outside the furnace

D2‧‧‧ furnace inside

P‧‧‧ position

W‧‧‧ blast furnace

W1‧‧‧ furnace wall

W2‧‧‧iron outlet

W3‧‧‧floor

W5‧‧‧ molten iron

Fig. 1 is a view showing a blocking hole opening device according to a first embodiment of the present invention, and is a side view (partial cross section) of a blocking mode.

Figure 2 is a side view (partial section) of the same occlusion opening device in the opening mode.

Figure 3 is the same as the occlusion opening device in the opening mode. A cross-sectional view of the connecting portion of the rotating mechanism and the opening rod.

Fig. 4 is a view for explaining the method of blocking the opening of the embodiment.

Fig. 5 is a view for explaining a method of closing a hole in the embodiment.

Fig. 6 is a view for explaining the method of blocking the opening of the embodiment.

Fig. 7 is a cross-sectional view showing a blocking plug used in the occlusion device according to the second embodiment of the present invention.

Figure 8 is a diagram illustrating a method of occluding an opening using the same occlusion plug.

Fig. 9 is a cross-sectional view showing a blocking plug of a modified example of the occlusion device according to the second embodiment of the present invention.

Figure 10 is a diagram illustrating a method of occluding an opening using the same occlusion plug.

Figure 11 is a cross-sectional view showing a clogging device according to a modification of the present invention.

Form for implementing the invention

(First embodiment)

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

The occlusion opening device 1 can switch the state of the device to an occlusion mode in which the tap hole W2 formed in the furnace wall W1 of the blast furnace W is closed as shown in FIG. Figure 2 shows the opening pattern of the vented tap hole W2.

As shown in Fig. 1, the occlusion device 1 has a housing 10, a hydraulic pressure generating portion (pressure generating portion) 20, a hole rod 30 (see Fig. 2), and loading and unloading. a rotating portion (a detachable portion, a rotary driving portion) 35 and an advancing and retracting driving portion 45, wherein the casing 10 is formed with an internal space 11 in which the mud 100 can be accommodated; and the hydraulic generating portion (pressure generating portion) 20 is configured to pressurize Acting on the mud 100 contained in the internal space 11; the opening rod 30 is used to open the tap hole W2; the loading and unloading. The rotating portion (the detachable portion, the rotary driving portion) 35 is detachably connected to the base end of the blocking plug 110 or the like, and the occlusion plug 110 or the like is rotated; the forward and backward driving portion 45 is detachable. The rotating portion 35 is moved.

In addition, through the hole rod 30 and loading and unloading. The rotating portion 35 constitutes a tapping machine portion.

The casing 10 has a nozzle 12 and a slightly cylindrical cylinder 13 formed with an injection opening 12a. The cylinder 13 is disposed on the proximal end side of the nozzle 12 and has a through hole 13a. Each of the injection opening 12a and the through hole 13a communicates with the internal space 11 formed when the nozzle 12 and the barrel 13 are connected.

The hydraulic pressure generating portion 20 is attached to the proximal end side of the casing 10. The hydraulic pressure generating unit 20 includes a hydraulic cylinder 21 and a piston 22 that is supplied with oil from an oil supply source (not shown). The piston 22 is moved in the front-rear direction by the hydraulic cylinder 21. . The hydraulic cylinder 21 is provided with an inflow port and an outflow port (not shown) for adjusting 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, and the seal member is for holding the piston 22 and the hydraulic cylinder 21 in a watertight manner. Set even if the piston 22 is moved by the hydraulic cylinder 21 When the front end side moves, the injection opening 12a and the through hole 13a are still disposed further forward than the piston 22.

In the present embodiment, since the piston 22 does not block the injection opening 12a and the through hole 13a, the piston 22 or the hydraulic cylinder 21 does not have a hole for the passage of the plug 110 or the mud 100.

As shown in FIG. 2, the opening rod 30 is formed in an elongated rod shape. The front end of the opening rod 30 is provided with a drill cone 31 for scooping the furnace W1 and the like. The base end of the opening rod 30 is formed with an internal thread portion 32 as shown in FIG. In this example, the opening rod 30 is disposed outside the casing 10.

As shown in Fig. 1, the occlusion plug 110 used in the occlusion device 1 of the present embodiment is formed into a slightly rod shape by a calcined refractory which is softer than the calcined material of the slurry 100 (baking slurry 100A to be described later). . The length of the occlusion plug 110 is set to be almost equal to the length of the tap hole W2.

The occlusion plug 110 is formed by refracting a pulverized material of a slurry composed of, for example, alumina, pyrophyllite, tantalum carbide, refractory clay or the like. If the occlusion plug 110 is to be softened, for example, it is only necessary to increase the content of the binder (tar, resin) in the mud. If the occlusion plug 110 is to be hardened, it is only necessary to increase the metal in the mud (aluminum, etc.) The content of ) can be.

The proximal end of the occluding plug 110 is formed with an internal thread portion (not shown) of the internal thread portion 32 of the above-described venting rod 30.

Loading and unloading. The rotating portion 35 has: loading and unloading. Rotating mechanism 36, and connected to loading and unloading. The loading and unloading adapter 37 of the rotating mechanism 36.

Loading and unloading. The rotating mechanism 36 has an external thread portion 38 as shown in Fig. 3 and a rotary drive motor (not shown). The internal thread portion 32 of the hole rod 30 is screwed to the The external threaded portion 38 can connect the opening rod 30 to the loading and unloading. Rotating mechanism 36.

Rotating the drive motor causes the male threaded portion 38 to rotate about the axis C1 of the male threaded portion 38. Thereby, connected to the loading and unloading. The opening rod 30 of the external threaded portion 38 of the rotating mechanism 36 is rotatable about its own axis.

The detachable adapter 37 has a gear case (not shown) and a coupling shaft 39. Attach the loading and unloading adapter 37 to the loading and unloading. Rotating mechanism 36, the gear box will be engaged in loading and unloading. The external thread portion 38 of the rotating mechanism 36 allows the connecting shaft 39 to rotate about its axis C2.

The distal end of the connecting shaft 39 is formed with a threaded portion (not shown) that is screwed into the internal thread portion of the closing plug 110. The axis C2 of the connecting shaft 39 and the axis C1 of the male screw portion 38 are set to be almost parallel. Moreover, 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 portion of the casing 10.

The advancing and retracting drive unit 45 has an advancing and retracting drive motor 45a provided on the guide rail 51, and an advancing and retracting drive unit main body 45b that is connected to a lower portion of the guide rail 51 so as to be slidable in the direction of the axis C2. When the advancing and retracting drive motor 45a is driven, the advancing and retracting drive unit main body 45b can advance and retreat along the guide rail 51 in the direction of the axis C2.

The blocking plug 110 is connected to the external threaded portion of the connecting shaft 39, and the blocking plug 110 is moved to the front end side by the advancing and retracting driving portion 45, so that the blocking plug 110 can pass through the through hole 13a and the internal space 11 from the injection opening 12a. Prominent in front.

The position adjusting device 52 is disposed on the floor panel W3, and can adjust the position of the casing 10 in the front-rear direction and the up-and-down direction of the floor panel W3.

Compared with the opening mode shown in Fig. 2, in the blocking mode shown in Fig. 1, the casing 10 is moved downward to perform work.

In the opening mode, the plug member 53 that blocks the through hole 13a can also be used.

Next, a method of blocking the opening of the present embodiment using the above-described occlusion opening device 1 having the above configuration will be described.

Hereinafter, for convenience of explanation, as shown in FIG. 1, the sluice step of closing the tap hole W2 by the clogging hole device 1 in the closed mode is described from the case where the tap hole W2 is formed in the furnace W1. . In this state, the high-temperature molten iron W5 in the blast furnace W flows out to the furnace outer side D1.

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

Specifically, the advancing and retracting drive unit body 45b of the advancing and retracting drive unit 45 is first moved to the base end side on the guide rail 51, and the loading and unloading adapter 37 is connected to the loading and unloading. After the rotating mechanism 36, the closing plug 110 is connected to the front end of the connecting shaft 39. At this time, the occlusion pin 110 is first held in front of the connecting shaft 39, and then by loading and unloading. The rotation mechanism 36 rotates the coupling shaft 39 with respect to the closing plug 110 about the axis C2. Thereby, the female screw portion of the occluding plug 110 can be screwed to the male screw portion of the connecting shaft 39, and the occluding plug 110 can be easily connected to the connecting shaft 39.

Then, the advancing and retracting drive unit 45 moves the blocking plug 110 to the distal end side, and adjusts so that the distal end of the blocking plug 110 passes through the through hole 13a and almost coincides with the injection opening 12a.

Next, the tap hole W2 of the furnace wall W1 is communicated with the injection opening 12a of the casing 10 (the communication arrangement step).

This step adjusts the front and rear direction of the housing 10 by the position adjusting device 52. And the position in the up and down direction. Next, the hydraulic pressure generating unit 20 pushes the slurry 100 into the tap hole W2 through the injection opening 12a as shown in Fig. 4, and fills the tap 100 with the tap hole W2 (the slurry pushing step).

Next, as shown in FIG. 5, the occlusion plug 110 is pushed into the tap hole W2 through the injection opening 12a of the casing 10 (the clogging push step).

The mud 100 pushed out from the tap hole W2 is protruded in a convex state on the furnace inner side D2 by the closing plug 110 pushed into the tap hole W2, and the protective mud 101 is formed. The protective mud 101 protects the furnace wall W1 from being eroded by the molten iron W5 flowing out of the tap hole W2.

The housing 10 is held in a state of abutting against the tap hole W2 for a while, and then the housing 10 is moved to the base end side by the position adjusting device 52 to move the housing 10 away from the tap hole W2 (baking step) .

During this step, the slurry 100 is fired by the heat of the molten iron W5 to become the calcined slurry 100A shown in Fig. 6.

Above, the occlusion step is ended.

After the blast furnace W is operated in this state for a while, when the molten iron W5 is to be taken out again, the opening step described below is performed.

In the opening step, as shown in Figure 2, loading and unloading. The rotating mechanism 36 takes out the loading and unloading adapter 37, and then connects the opening rod 30 to the loading and unloading. Rotating mechanism 36.

The housing 10 is moved upward by the position adjusting device 52, and the drill cone 31 of the opening rod 30 abuts against the closing plug 110 that has closed the tap hole W2. By loading and unloading. The rotating mechanism 36 rotates the opening rod 30 about the axis C1, and at the same time, the opening and closing lever 30 is moved to the front end side by the advancing and retracting driving portion 45, so that the blocking plug 110 can be cut and the inside of the furnace D2 is located more than the blocking plug 110. Roasting mud 100A to form the iron outlet W2.

Above, the opening step is ended.

As described above, according to the occlusion device 1 and the occlusion method of the present embodiment, since the occlusion plug 110 is formed of a refractory material which is softer than the calcined mud 100A, the occlusion is excavated in the opening step. The force required to open the hole for the opening of the plug 110 is reduced, and the tap hole W2 can be easily opened.

In addition, since the calcined slurry 100A is harder than the clogging plug 110 and is hard to be eroded by the molten iron W5 or the like, it is possible to prevent the tap hole W2 from being eroded by the molten iron W5 and becoming large.

The length of the occlusion plug 110 is set to be almost equal to the length of the tap hole W2. Therefore, the length of the boring in the opening step will be almost equal to the length of the occluding plug 110, and since the soft member is plucked in the opening step, the tap hole W2 can be more easily opened.

The occlusion opening device 1 has a hole rod 30 and is loaded and unloaded. Since the rotating portion 35 is rotated, the two steps of the blocking step and the opening step can be performed by one device by switching between the blocking mode and the opening mode.

Since the opening rod 30 is disposed outside the casing 10 in the opening step, even if the opening rod 30 is bent due to the heat of the molten iron W5 or the like, the operation of the blocking opening device 1 can be prevented from being hindered.

(Second embodiment)

Next, a second embodiment of the present invention will be described with reference to Figs. 7 to 10 . The same components as those of the above-described embodiments are denoted by the same reference numerals, and their description will be omitted, and only the differences will be described.

As shown in Fig. 7, the occlusion plug 120 used in the occlusion device 1 of the present embodiment has a tube (tubular member) 121 and a filling member 122 which is set to have an outer diameter smaller than the inner diameter of the tap hole W2. The filling member 122 is disposed in the pipe of the pipe 121.

As the material forming the tube 121, a metal such as steel can be used. The filling member 122 can be formed using the same material as the aforementioned occluding plug 110.

Further, the proximal end of the occluding plug 120 is preferably formed with an internal thread portion having the same shape as the internal thread portion of the occluding plug 110.

Next, a method of closing the opening of the present embodiment using the blocking plug 120 and the closing opening device 1 configured as described above will be described.

The occlusion step is the same as the step of the first embodiment using the occlusion plug 110, and thus the description thereof is omitted.

In the opening step, as shown in FIG. 8, the drill tap 31 of the opening rod 30 abuts against the filling member 122 of the closing plug 120 that has closed the tap hole W2. Next, the filling member 122 of the occluding plug 120 and the baking mud 100A located further on the furnace inner side D2 than the filling member 122 are cut out to form the iron outlet W2.

According to the occlusion opening method of the present embodiment using the occluding plug 120 configured as described above, the filling member 122 which is softer than the baking slag 100A can be cut, and the tap hole W2 can be easily opened.

As in the present embodiment, the occlusive plug 120 is formed such that a portion softer than the calcined slurry 100A continues to extend over the entire length of the occluding plug 120. Further, in the opening step, the portion formed to be soft is cut by the hole rod 30 to the entire length of the occluding plug 120, and the tap hole W2 can be easily opened.

Therefore, as in the occlusion plug 110 of the first embodiment, the entire occlusion plug 110 can be formed to be very soft, and a part of the outer circumference of the occlusion plug can be formed to be soft throughout the entire length.

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

The occlusion plug 130 is in the occlusion plug 120, and the filling member 122 is disposed only from a position P at a certain distance from one end 121a of the tube 121 to the other end 121b side of the tube 121. This certain distance can be appropriately set depending on the size of the drill cone 31 of the occlusion opening device 1, and the like.

The inner peripheral surface on the one end 121a side of the tube 121 is preferably formed with an internal thread portion having the same shape as the internal thread portion of the occluding plug 110.

The occlusion step of the occlusion opening method using the occlusion plug 130 according to the modification of the above configuration is the same as the occlusion step of the present embodiment. On the other hand, the opening step will become as follows.

As shown in FIG. 10, the drill cone 31 of the occlusion device 1 is inserted into one end 121a of the tube 121 of the occlusion plug 130, and then by loading and unloading. Rotating mechanism 36 rotates aperture rod 30 about its axis. Thereby, the filling member 122 and the baking mud 100A located further on the furnace inner side D2 than the filling member 122 are cut, and the iron outlet W2 is formed.

When the tap hole W2 is opened in the portion where the closing plug 120 is closed as in the present embodiment, the front end of the opening rod 30 is rotated during the period until the filling member 122 of the furnace outer side D2 is recessed. Therefore, the operator uses an iron bar or the like to restrain the position of the front end of the opening rod 30.

In the above, the first embodiment and the second embodiment of the present invention are described in detail with reference to the drawings. However, the specific structure is not limited to the embodiment, and structural changes and the like without departing from the scope of the invention are also included. Further, each structure shown in each embodiment can be used as it is.

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 which is softer than the calcined cement 100A.

However, these members may also be formed of a material which is refractory which is softer than the calcined mud 100A after being calcined. The material may use the aforementioned alumina, pyrophyllite, tantalum carbide, refractory clay, and mixtures thereof.

By using the material to form the occluding plug 110 and the filling member 122, the occluded plug 110 or the filling member 122 can be diced, and the tap hole W2 can be easily opened.

Further, in the first embodiment and the second embodiment, as shown in FIG. 11, the closing and opening device 2 may have a duct 61 provided in the internal space 11 of the casing 10.

One end 61a of the duct 61 is disposed in a state of being separated from the opening edge of the injection opening 12a in the injection opening 12a of the casing 10. The opening on the other end 61b side of the duct 61 is disposed to communicate with the through hole 13a. The inner diameter of the conduit 61 is set to allow the occlusion plug 110 to be inserted.

In this manner, the occlusion control device 2 is constructed. In the occlusion mode, the friction generated by the occluding plug 110 and the mud 100 is hard to be generated in the casing 10, so that the occlusion plug 110 can be easily inserted into the tap hole W2.

In the first embodiment and the second embodiment, the opening machine unit By the hole rod 30 and loading and unloading. The rotating portion 35 is configured and integrated with the occluding and opening device 1. However, the occlusion opening device may not have a boring machine portion, and a well-known cone or the like may be used as the boring machine portion.

Further, in the first embodiment and the second embodiment, the length of the closing plug is set to be almost equal to the length of the tap hole W2. However, the length of the occlusion plug is not limited, and may be appropriately set to be shorter than the length of the tap hole W2.

In the occlusion hole device 1 of the first embodiment and the second embodiment, the clogging pin 110 is not pushed into the tap hole W2 in the occluding step, and the tap hole W2 is closed only by the mud 100, and the ferrule W2 can be used. The same method occludes the tap hole W2. That is, the clogging device 1 of the present invention can switch between the method of closing the tap hole W2 by using the mud 100 and the occluding plug 110, and the method of clogging the tap hole W2 using only the mud 100.

Industrial availability

The present invention relates to a method of occluding a hole formed by clogging a taphole formed in a blast furnace wall and opening the clogging said tap hole, which has a occluding step for occluding the mud and forming a slightly rod-shaped occlusion a step of inserting the plug into the tap hole, baking the mud to block the tap hole; and a step of opening the step of cutting the plug and the calcined slurry to form the tap hole The occlusion plug has a portion formed to be softer than the calcined material of the mud, and the portion continues to the entire length of the occlusion plug itself. According to the present invention, since the occluding plug has a portion which is formed to be softer than the calcined material of the shale, and the portion continues to the entire length of the occluding plug itself, the opening can be reduced when the clogging tap hole is opened The required force can easily open the tap hole.

1‧‧‧Closed opening device

10‧‧‧shell

11‧‧‧Internal space

12‧‧‧ nozzle

12a‧‧‧Injection opening

13‧‧‧Bowl

13a‧‧‧through hole

20‧‧‧Hydraulic pressure generation unit (pressure generation unit)

21‧‧‧Hydraulic cylinder

22‧‧‧Piston

35‧‧‧ Loading and unloading. Rotating part (mounting and unloading part, rotary drive part)

36‧‧‧ Loading and unloading. Rotating mechanism

37‧‧‧Loading and unloading adapter

39‧‧‧Connected shaft

45‧‧‧Advance and Rescue Drive Department

45a‧‧‧Advance and retraction drive motor

45b‧‧‧Advance and retreat drive unit

51‧‧‧rails

52‧‧‧ Position adjustment device

100‧‧‧mud

110‧‧‧Closed plug

C1‧‧‧ axis

C2‧‧‧ axis

D1‧‧‧ outside the furnace

W‧‧‧ blast furnace

W1‧‧‧ furnace wall

W2‧‧‧iron outlet

W3‧‧‧floor

W5‧‧‧ molten iron

Claims (15)

The invention discloses a method for occluding a hole, which is a method for clogging a taphole formed on a wall of a blast furnace and opening a hole of the clogging outlet, which has a occlusion step, which is a sluice plug which is formed into a slightly rod shape. a step of burying the slurry to occlude the tap hole after filling the tap hole; and a step of opening the plug and the calcined slurry to form the tap hole, The occlusion plug has a portion formed to be softer than the calcined material of the mud, and the portion continues to the entire length of the occlusion plug itself. The occlusive opening method according to the first aspect of the invention, wherein the occlusion plug has: a tubular member; and a filling member disposed in a conduit of the tubular member. The method of occluding a hole according to the second aspect of the invention, wherein the filling member is a refractory material which is softer than the calcined material of the mud material, and the filling member is cut in the opening step. The method of occluding a hole according to the second aspect of the invention, wherein the filling member is made of a material which is refractory which is softer than the calcined material of the mud after calcination, and is cut in the opening step. Dig the aforementioned filling member. The occlusive opening method according to any one of claims 2 to 4, wherein the filling member is disposed only from a position spaced apart from one end of the tubular member to the other end side of the tubular member. The occlusive opening method according to any one of claims 1 to 5, wherein the occlusion plug is almost the same length as the length of the tap hole. An occlusion opening device for clogging a taphole formed in a blast furnace wall and opening the clogging of the tap hole, the housing having a housing containing an internal space for containing mud and formed with The injection opening and the through hole communicating with the internal space; the pressure generating portion is configured to apply pressure to the mud contained in the internal space; and the attaching and detaching portion is detachably coupled to the occlusion stopper formed in a slightly rod shape a driving unit that moves the blocking plug connected to the attaching and detaching portion to protrude from the injection opening to the outside of the housing through the through hole and the internal space; and the opening machine unit is attached to the opening After the tap hole is closed, the occlusion plug that has closed the tap hole and the calcined slurry are dig, the clogging plug has a portion that is formed to be softer than the calcined material of the mud, and the portion Extending to the full length of the aforementioned occlusion plug itself. The occlusion device of claim 7, wherein the boring machine portion has a boring rod disposed outside the casing and detachably coupled to the detachable portion; and a rotary driving portion The rotation rod connected to the detachable portion is rotated about the axis of the opening rod. An occlusion opening device according to claim 7 or 8 of the patent application, which has a guide The tube is disposed in the internal space, and is disposed such that an opening is in a state of being separated from an opening edge of the injection opening in the injection opening, and another opening is connected to the through hole, and the blocking plug is inserted into the catheter. Moved by the guide. An occlusion method is a method for occluding a taphole formed in a furnace wall of a blast furnace, comprising: a pushing step of pushing a mud material and a occlusion plug formed into a slightly rod shape into the tap hole; and The occluding step is a step of roasting the slurry to occlude the tap hole, the occlusion plug having a portion formed to be softer than the calcined material of the mud, and the portion continuing to the entire length of the occlusion plug itself. The occlusion method of claim 10, wherein the occlusion plug has: a tubular member; and a filling member disposed in a conduit of the tubular member. The occlusion method of claim 11, wherein the filler member is a refractory material that is softer than the calcined material of the mud material. The occlusion method of claim 11, wherein the filling member is made of a material which is refractory which is softer than the calcined material of the pulverized material after calcination. The occlusion method according to any one of claims 11 to 13, wherein the filling member is disposed in the tubular member at a position further inside than a position facing a distance from an open end of the blast furnace outer side. The occlusion method according to any one of claims 10 to 14, wherein the occlusion plug is almost the same length as the length of the tap hole.