JPH06200308A - Device for dismantling large trough in blast furnace and method therefor - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently shorten the dismantling work by efficiently dismantling the gutter dismantling work while suppressing the generation of dust and the like, and automating the dismantling work without human intervention. In addition to improving the work environment and saving labor, the workers are freed from dismantling work under high temperature and dust environment. [Structure] In a blast furnace large gutter dismantling apparatus for removing the blast furnace large gutter 1 from the hearth and dismantling the refractory 3 of the large gutter 1, the large gutter 1 can be placed and a gutter moving member that can move in the longitudinal direction of the gutter and across the gutter. The support member 7 arranged and supported by the support member 7,
A cutting member 1 which can be rotated by a rotary driving body 12 and can be moved or tilted at least in the horizontal direction and the width direction of the gutter 1.
It is characterized by consisting of 8 and.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gutter refractory disassembling apparatus for disassembling a refractory when repairing a refractory on the inner surface of a gutter deteriorated by passage of molten pig iron and slag, and a method of disassembling the same. .

[0002]

2. Description of the Related Art A blast furnace gutter usually has a length of about 20 m, and hot iron molten slag discharged from the blast furnace at a high temperature is flowed into the gutter and the inside of the gutter installed inside the gutter. Local refractory is subject to local wear due to pig iron or slag, chemical deterioration, and local deterioration due to repeated heating and cooling due to switching of tapping gutter, etc., and residual iron remains on the irregular refractory. . Therefore, in general, 1 per gutter
About once or twice a month, it is necessary to dismantle the gutter and hot repair the irregular refractory.

Conventionally, the dismantling work of this gutter has been performed as shown in FIGS. 17 and 18. That is, first,
As shown in FIG. 17, a steel plate 51 is installed on the gutter 50, and a backhoe 52 is installed on the steel plate 51. A breaker 53 is attached to the tip of the backhoe 52, and an unshaped refractory 54 on the inner surface of the large gutter 50 is operated by an operator.
The residual iron lump remaining on the upper portion and the deteriorated surface portion of the amorphous refractory 54 are crushed to an average thickness of 100 mm and a maximum of 250 mm. The debris dismantled in this way, as shown in FIG.
The breaker 53 of the backhoe 52 is replaced with a shovel 55, scraps are scraped off by the shovel 55, and discharged by a bucket 56.

However, the conventional dismantling work of the Ohiga,
Since the work is performed directly above the gutter, the work is performed in a high temperature atmosphere due to the residual heat of the gutter, and the breaker 5
Since it is dismantled using No. 3, not only considerable vibration and noise are generated, but also dust is generated at the time of crushing, resulting in work in a bad environment.

The residual iron has a maximum thickness of 150 mm (generally 100 mm to 50 mm) and a maximum width of 1000 mm.
Yes, because it is tougher than the amorphous refractory, the efficiency of dismantling is poor, and it greatly affects the efficiency of the entire dismantling work of Ohi. The conventional dismantling work of the Ohiga like this usually takes one day and requires six working personnel.

Therefore, in order to improve the efficiency and work environment of the dismantling work of a large gutter, the conventional method is disclosed in JP-A-60-230926.
As described in Japanese Patent Publication, a facility for mechanizing the operation of dismantling a gutter refractory has been proposed. This equipment has a configuration in which a bogie equipped with a breaker and a finishing cutting machine can run on a rail provided along a gutter by a winch.After rough cutting with a breaker, finish cutting with a cutting machine , We are trying to eliminate heavy work in high temperature atmosphere.

Further, regarding the dismantling of residual iron in the blast furnace large gutter, a gutter repairing device for tapping metal disclosed in JP-B-61-2722 and JP-B-59-43703 has been proposed, and this gutter repairing device for tapping is proposed. In, the residual iron of the tapping gutter is grooved with a cutter lance and cut with a drive arm and a lifting device.

[0008]

However, the above-mentioned method has the following drawbacks. (1) Since the work is performed in front of the furnace, the environment is extremely poor due to vibration and noise due to the use of breakers, dust generation, and high-temperature atmospheric conditions due to residual heat because the work is performed directly above the gutter. Is.

(2) Skilled and skilled in carrying out back bows for dismantling, carrying out a series of devices such as breaker and shovel attachment / detachment, cooperation work such as arrangement and setup of devices according to the process, and operation of breakers and excavators. Therefore, securing work personnel was a problem.

(3) Even when mechanization is performed, skill is required for operation, and even when high efficiency is intended, the apparatus becomes large in size in preparation for a large reaction force.

(4) When cutting the residual iron with a cutter lance, the groove machining speed is slow and the efficiency is poor. Even when a cutting tool is used, the tool life is short and the work efficiency is poor in the replacement work.

(5) Further, when the residual iron is cut by the cutter lance, the molten metal at the time of cutting remains in the cutting groove, the residual iron cannot be completely cut, and the residual iron and the large gutter become unshaped refractories. Has a high adhesive strength and cannot be adsorbed and conveyed by a lifting magnet simply by cutting with a cutter lance, which causes a problem in dismantling residual iron.

(6) On the other hand, in dismantling refractory materials, if the dismantled refractory materials have different sizes, the dismantling scraps cannot be efficiently removed and automation is difficult.

The present invention has been made in view of the above-mentioned problems, and the dismantling work of the blast furnace gutter is carried out in a dismantling factory different from the blast furnace floor to dismantle while suppressing the generation of dust and the like. Dismantling work is automated without human intervention to improve the efficiency and shortening of the dismantling work, while freeing workers from the dismantling work under high temperature and dust environment to improve the working environment and save labor. The purpose is to downsize the device.

[0015]

The invention according to claim 1 is
In a blast furnace large gutter dismantling device for removing the blast furnace gutter from the hearth and dismantling the refractory of the gutter, a gutter moving member on which the gutter is placed and movable in the gutter longitudinal direction, and a supporting member arranged so as to straddle the gutter, It is characterized in that it comprises a cutting member which is supported substantially vertically by the support member toward the gutter, is rotated by a rotary drive, and is movable or tiltable at least in the vertical direction and the width direction of the gutter.

The invention according to claim 2 is characterized in that a casing bit for cutting residual iron is used as the cutting member.

According to a third aspect of the present invention, as the cutting member, a rotary drum for dismantling a refractory having a crushing type cutting edge is used.

The invention according to claim 4 is characterized in that the casing bit for residual iron cutting as the cutting member and the rotary drum for dismantling the refractory can be replaced.

A fifth aspect of the present invention is characterized in that the crushing-type cutting blade provided in the rotating drum according to the third aspect is arranged in a spiral shape so as to be directed toward the tip end direction as the rotating drum rotates.

The invention of a method according to claim 6 is a blast furnace large gutter dismantling method for dismantling a refractory material in a gutter by rotating a rotary drum having a crushing type cutting blade, in the tangential direction of the cutting blade in contact with the refractory material. It is characterized in that the rotating drum rotating direction and the gutter moving direction are selected so that the relative moving direction of the gutter and the relative moving direction of the gutter coincide with each other, and the gutter is disassembled.

According to a seventh aspect of the present invention, the inclination angle and the moving direction of the gutter are selected in the gutter longitudinal direction of the rotary drum so that the tangential direction of the cutting edge in contact with the refractory is directed to the gutter bottom direction. Characterized by dismantling the gutter.

The invention of the method according to claim 8 is the method for dismantling a blast furnace large gutter according to claim 6 or 7, wherein the crushing is carried out on a rotating drum having a spiral arrangement extending toward the tip end along with the rotation of the rotating drum. It is characterized by using a rotary drum having a cutting edge of a formula.

The invention of a method according to claim 9 is a blast furnace large gutter dismantling method for dismantling a refractory material of a gutter by rotating a rotating drum having a crushing type cutting blade, in a tangential direction of a refractory material dismantling side of the rotating drum. When dismantling the gutter while matching the relative direction of the gutter with the relative moving direction, the blast furnace large gutter dismantling method according to claim 7 is also used for dismantling.

[0024]

According to the above construction, the blast furnace gutter can be dismantled while suppressing the generation of dust and the like by performing the dismantling work in the dismantling factory, not in the blast furnace casting floor. Can be automated without going through.
As a result, it is possible to improve the efficiency and shorten the dismantling work, and to free the workers from the dismantling work under high temperature and dust environment to improve the working environment, save labor and downsize the device. it can.

Further, the rotary drum, which is supported by a support member arranged so as to straddle the gutter substantially vertically toward the gutter, and rotatable by a rotary drive body, is at least the vertical direction and the width direction of the gutter. The gutter is mounted on a gutter moving member that can move in the longitudinal direction of the gutter, and while moving the gutter, the rotary drum can be dismantled to remove the residual iron or refractory, which is efficient. You can do various dismantling work.

Further, in the invention described in claim 2, when a casing bit is used as a cutting member when the residual iron is present on the bottom surface of the large gutter, the casing bit is used as a cutting member.
After the casing bit is contacted, the rotary drive is rotated and cut, so the vibration at the time of cutting the casing bit is easily transmitted to the residual iron, and the residual iron is easily peeled off from the refractory, enabling efficient disassembly processing. Becomes

Further, according to the invention described in claim 3, when the rotary drum for dismantling the refractory having a crushing type cutting blade is used as the cutting member, the rotary drum itself rotates in accordance with the movement of the carriage. However, since it moves relatively, the cutting blade of the rotating drum efficiently crushes the irregular refractory in the gutter. In addition, if the rotary drive can only be moved in the vertical and width directions of the gutter, and can be tilted in the width direction or the longitudinal direction of the gutter, the direction of the rotary drum can be changed depending on the situation of the refractory loss of the gutter, which is efficient. You can do dismantling work.

Further, according to the invention described in claim 4, since the casing bit for cutting residual iron as the cutting member and the rotary drum for dismantling the refractory can be replaced, the apparatus itself can be made common. It is possible to save the installation space because it is not necessary to separately provide a device for cutting residual iron and a device for dismantling refractory materials. In addition, pig iron dismantling work and unstructured refractory material dismantling work can be performed in series.

According to the fifth or eighth aspect of the present invention, the crushing-type cutting blade of the rotary drum is arranged in a spiral shape toward the tip end as the rotary drum rotates. When an amorphous refractory is dismantled using this rotating drum, the cutting edge of the rotating drum is brought into contact with the refractory from the cutting edge on the rear end side of the rotating drum in sequence according to the rotation, and the refractory is broken into small pieces. You can

On the contrary, in the case of a spiral arrangement in which the rotary drum is rotated toward the rear end direction (upward direction of the blast furnace gutter), the cutting blade is first contacted in a direction away from the upper end of the blast furnace gutter. The next cutting edge comes into contact with a position closer to the end of the gutter than the cutting blade that came into contact with the first cutting edge due to the rotation of the rotary drum.
On the other hand, refractories are easily broken by impact, and once the cutting blade
If a part of the refractory with a flaw is closer to the end than the position with the flaw, and the impact is applied with the cutting edge, the edge side will break easily from the position where the flaw was first attached, and the cutting edge will fall off easily. The refractory material falls off from the gutter as a large lump before it abuts near the end of the gutter.

However, in the spiral direction according to the fifth aspect, the next cutting edge comes into contact with the inside of the cutting edge with which the preceding abutment is slightly abutting (below the gutter), and only the pitch portion between the cutting edges is fire-resistant. The object can be dismantled, the refractory can be made into small pieces, and the dismantling object removal device performed thereafter facilitates the dismantling work.

In the invention of the method according to claim 6, the gutter is dismantled while the rotating direction of the rotating drum is made to coincide with the tangential direction on the refractory dismantling side of the rotating drum and the relative moving direction of the gutter. . Therefore, until the cutting edge comes into contact with the refractory and separates from it, the direction of dismantling force is always applied only to the inside of the refractory, and no additional tensile stress is applied to the gutter refractory,
The cutting edge of the rotating drum enables the dismantling of small refractories.

That is, when the gutter is disassembled in the opposite direction to the invention described in claim 6, the cutting edge of the rotary drum is
The initial contact with the refractory material softly hits the refractory material at a gentle angle from the tangential direction, but the amount of biting of the cutting edge in the refractory material gradually increases and becomes maximum at the position away from the refractory material.
In addition, the cutting edge that abuts or bites into the refractory works disassembly force in the tangential direction, so it acts in the direction of peeling the refractory from the gutter, that is, in the outward direction, so the brittle refractory is disassembled into large blocks. It will be.

On the other hand, when the tangential direction on the refractory dismantling side of the rotary drum according to claim 6 and the relative moving direction of the gutter are made to coincide with each other, the refractory initially has a sharp cutting edge. However, since the tangential direction of the cutting edge on which the dismantling force acts is the inner direction of the refractory of the gutter, it is less likely to be disassembled as a large lump. Further, even if the refractory material is lumped and dismantled, the refractory material is contacted and broken by the next cutting blade while being wound up on the rotary drum, and the refractory material is lumped into smaller pieces. At the position where the cutting edge is away from the refractory, biting with the refractory is gradually reduced, and it is prevented that extra stress is applied to the refractory of the gutter, and the refractory is stably lumped and disassembled. Can be done. Moreover, since there is no force component in the longitudinal direction of the gutter, the feeding of the gutter becomes stable, and as a result, it is possible to stably crush and disassemble the gutter.

In the invention of the method according to claim 7, since the tangential direction of the refractory dismantling side of the rotary drum is the gutter bottom direction, the tangential direction of the cutting blade on which the dismantling force acts is restrained by the gutter refractory material. It is unlikely that demolition debris will be compressed and dismantled as a large lump due to the internal direction, and even if the refractory material becomes large lumps and dismantled, the next cutting edge will be caught while being caught in the rotating drum. It is possible to prevent the scraps from coming into contact with each other and breaking up into small pieces of refractory material to form large pieces of debris.

The invention of the method according to claim 9 uses the invention according to claim 6 or 7 in combination, so that the rotary drum can be moved corresponding to the unevenness caused by the erosion generated on the inner surface of the blast furnace gutter and the efficiency can be improved. Can be dismantled.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The examples described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes. 1 to 4 are
FIG. 1 shows an embodiment in which a casing bit for cutting residual iron is used as a cutting member when treating residual iron with the blast furnace gutter residual iron dismantling apparatus of the present invention, and FIG. 1 is a casing for residual iron cutting. FIG. 2 is a perspective view when a bit is attached, FIG. 2 is a front view of a device portion of the embodiment of FIG. 1, FIG. 3 is a sectional view of a casing bit portion for cutting residual iron, and FIG. 4 is a casing bit for cutting residual iron. It is a bottom view.

In FIG. 1, 1 is a gutter, and a gutter 1
Is formed into a gutter-like shape by laminating refractory bricks on the inside of the metal 2 and further arranging the amorphous refractory 3 containing alumina and silicon carbide as the main components on the inside thereof. The gutter 1 usually has a length of about 20 m, and pig iron or slag that has been melted to a high temperature from the blast furnace is poured into the gutter 1. Therefore, the irregular refractory 3 on the inner surface of the large gutter 1 is locally worn by pig iron and slag, chemically deteriorated, and locally deteriorated by repeated heating and cooling due to switching of tapholes. No. 1 is about once or twice a month and requires dismantling work and repair work. In this dismantling work, residual iron 4 may remain on the irregular shaped refractory 3 of the gutter 1. In this case, it is necessary to treat the residual iron 4 and remove the residual pig iron to remove the refractory. It will be work to remove.

Then, the work for removing the residual iron 4 will be described. The gutter 1 removed from the blast furnace casting is placed on a carriage 6 movable on a traveling rail 5, and a supporting member 7 is arranged so as to straddle the gutter 1 placed on the carriage 6. The support member 7 is composed of a pair of left and right inverted V-shaped column members 8 and an arm 9 that connects the pair of column members 8. The arm 9 is provided with a moving body 10 and an appropriate means such as a hydraulic cylinder 11 or the like. It is possible to move in the width direction of the gutter.

The movable body 10 is provided with a rotary drive body 12, and the rotary drive body 12 allows a casing bit 14 for cutting residual iron to rotate via a boom 13. The boom 13 can be expanded and contracted in the vertical direction by a signal from the control device while the casing bit 14 is rotating. Further, the carriage 6 may be moved by either a self-propelled method in which a motor and a speed reducer are attached to the carriage 6 or a method in which a drive device is provided in another place to pull the carriage 6.

This embodiment is constructed as described above, and after moving the portion of the residual iron 4 of the gutter 1 placed on the carriage 6 below the support member 7, the hydraulic cylinder 11 is operated to move. The body 10 is moved so that the casing bit 14 for cutting residual iron is located directly above the residual iron 4. Next, while driving the rotary drive body 12, the boom 13 is extended and the residual pig iron is cut.
When the formation of one cutting groove 15 is completed in this way, the rotation of the casing bit 14 by the rotary drive body 12 is stopped, and the casing bit 14 is raised by the boom 13 to a position slightly away from the surface of the residual iron 4. In this state, considering the length of the residual iron 4 in the width direction of the gutter 1, the moving body 10 and the carriage 6 are moved, and then the casing bit 14 is moved to the position where the cutting groove 15 is formed. The rotating drum 18 is rotated while extending 13 to perform cutting.

Further, the cutting interval is formed by densely forming the cutting grooves 15 when the thickness of the residual iron 4 is large, and forming the cutting groove 15 roughly when the thickness of the residual iron 4 is thin. For example, the length of the residual iron 4 in the gutter 1 in the width direction of the gutter 1 is usually 7
When the diameter of the casing bit 14 is 600 mm, for example, when the residual iron 4 is thick, the cutting groove 15 is slightly overlapped with the outer peripheral portion in the longitudinal direction of the gutter 1. By sequentially stacking them so that they are close to each other, the cut residual iron 4 can be easily peeled off, and can be peeled off / disassembled while suppressing the generation of dust.

As is generally known, when the casing bit 14 for cutting the residual pig iron is cut, the casing bit 14 gives a certain vibration to the residual pig iron while rotating, so that the residual iron 4 and the gutter 1 have an irregular shape. The adhesive strength with the refractory 3 is weakened, and the residual iron 4 can be easily peeled from the irregular refractory 3 of the gutter 1.

After cutting off the residual iron, the Ohi 1 has a bogie 6
Then, it is moved from the support member 7, the residual iron is separated from the refractory by an impact ripper (not shown), and the inner bottom surface of the gutter 1 is discharged by a hydraulic excavator and a lifting magnet.

Next, the cutting bit mounting carriage 16 is moved right below the residual iron cutting casing bit 14 to a predetermined position, the boom 13 is extended, and the casing bit 14 is mounted on the cutting member mounting carriage 16. Thereafter, as shown in FIGS. 3 and 4, the bolt 17 provided on the inner bottom portion of the casing bit 14 is removed from the bottom portion of the cutting member mounting carriage 16 with a tool or the like, and the casing bit 14 is removed from the boom 13. After this, the boom 13 is lifted up and completely removed from the casing bit 14, and the cutting member mounting carriage 16 is moved,
The boom 13 is positioned directly above the rotary drum 18 for dismantling the refractory material having a crushing type cutting edge. Next, the boom 13 is extended, and the tip of the boom 13 is attached to the rotary drum 1 as shown in FIG.
It is inserted in the central mounting hole of 8 and is fixed with a bolt 17, and the bolt 17 is provided with a wire 19 for preventing rotation. In the above embodiment, the casing bit 14 or the rotary drum 1
Although the attachment / detachment of 8 is placed perpendicularly to the cutting member mounting cart 16, the casing bit 14 and the like are tilted and placed by utilizing the characteristic that the boom 13 can be tilted in the longitudinal direction of the gutter 1. It goes without saying that work efficiency may be improved.

Next, an example of disassembling the amorphous refractory after the residual pig iron treatment will be described. 5 is a perspective view when a rotary drum is attached, FIG. 6 is a front view of the apparatus portion of the embodiment of FIG. 5, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a second view of the blast furnace large gutter dismantling apparatus main body. FIG. 9 is a front view of the embodiment of FIG.
Is a front view of the third embodiment of the blast furnace large gutter dismantling apparatus main body, FIG.
1 is a side view of the same as above, FIG. 12 is a plan view of the same as above, FIG. 13 is a front view of the rotary drum, FIG.
15 and 16 are explanatory views showing a disassembled state on a rotary drum, and each drawing (a) is an explanatory view according to the present invention, and (b).
Is a reference explanatory diagram.

In the operation of dismantling the refractory material, the rotary drum 18 as a cutting member is moved up and down with respect to the large gutter and moved in the width direction of the large gutter 1 as in the case of dismantling the residual iron. It is possible to incline in the longitudinal direction and the width direction with respect to 1. That is, as shown in FIG. 6, the rotation driving body 12 is tilted by the tilting motor 20 via a gear or the like. In addition, the longitudinal direction of the gutter 1 is the swing motor 21.
Is rotated and rocked.

The cutting position of the rotary drum 18, which is a cutting member, can be moved or tilted with respect to the gutter 1 in the width direction or the longitudinal direction, and may be the embodiment shown in FIGS. 8 to 12. . That is, in the embodiment shown in FIGS. 8 and 9, the support member 7 is the rotating shaft 2 which can rotate the arm portion.
2, which is constructed by being rotatably installed on the pillar member 8 via the bearing 23. In addition, a rotary drive body 12 that rotationally drives a rotary drum 18 is attached to the moving body 10 that is attached so as to be movable by a hydraulic cylinder 11 along a rotary shaft 22, and the rotary drum 18 that rotates rotates in a gutter longitudinal direction. The refractory on the inner surface of the gutter 1 is disassembled by swinging with the hydraulic cylinder 24 and tilting with the hydraulic cylinder 25 in the gutter width direction.

In the embodiment shown in FIGS. 10 to 12,
The gutter 1 removed from the cast floor of the blast furnace is mounted on a dolly 6, and a pair of arms 9 are installed in parallel between the upper ends of the pillar members 8 so as to straddle the gutter 1 on the dolly 6, and fixed, A movable body 10 is slidably mounted on the arm 9, a tilting frame 26 is mounted on the movable body 10 in a state of being tiltable by front and rear shafts 27, 27, and a rotary driving body 12 is left and right in the tilting frame 26. It is attached in a swingable manner by the support shafts 28, 28, and the rotary drum 18 which is rotated by the drive of the rotary drive body 12 is swung in the gutter longitudinal direction, or moved or tilted in the gutter width direction. Gutter 1 by doing
It is configured to dismantle the refractory on the inner surface. This tilting, movement or rocking causes the rotary drum 18 to tilt in the gutter width direction by driving the tilting frame 26 by driving the tilting motor 29. Further, the swing motors 30 and 30 are driven to swing in the longitudinal direction of the gutter.

Next, the rotary drum 18 will be described. This rotating drum 18 is similar to a tool used for crushing and excavating hard rock in general tunnel excavation, and its size is slightly different because it matches the shape of the gutter 1. The drum is in the shape of a truncated cone, and on the surface thereof, a crushing type cutting blade 31 such as a so-called round bit or a conical bit is spirally arranged. As shown in FIG. 13, the spiral direction is such that the spiral arrangement is directed toward the tip direction as the rotary drum 18 rotates.

The rotary drum 18 is fixed to the tip of the boom 13 with the bolts 17 and the like as described above, but the shape and the like depend on the cross-sectional shape of the gutter 1, the diameter and height of the drum,
The number of cutting blades 31 and the mounting arrangement / angle of the cutting blades 31 are determined. The cutting edge 31 is attached to the surface of the drum substantially in the close combat direction of the drum and in the rotating direction. Each cutting edge 31 is generally made of cemented carbide, but it has a structure that can rotate around the axis of a cone and is attached at a special angle so that it can be entrained by the frictional force with the workpiece during excavation. It is designed so that it can be self-polished.

Next, the dismantling work of the refractory will be described. The dolly 6 is moved to move one end of the gutter 1 below the rotating drum 18. Next, while rotating the rotating drum 18, the boom 13 is extended, the moving body 10 is moved by the hydraulic cylinder 11, and the swinging motor 20 is operated to bring the peripheral end surface of the rotating drum 18 into contact with the side wall of the gutter 1. The dismantling of Object 3 is started. At this time, the carriage 6 is moved to the rotary drum 1
Move with dismantling by 8.

As shown in FIG. 15A, the moving direction of the carriage 6 is made to coincide with the tangential direction of the rotary drum 18 on the refractory dismantling side. When the carriage 6 is moved in the direction C opposite to the tangential direction A on the refractory dismantling side of the rotary drum 18 in the opposite direction, as shown in FIG. , The contact at the beginning of biting into the refractory 3 softly hits the refractory 3 at a gentle angle from the tangential direction, but the cutting edge 31
In the refractory material, the biting amount increases gradually, and becomes the maximum at a position away from the refractory material 3. Further, since the cutting blade 31 that abuts or bites into the refractory 3 acts in a tangential direction to dismantle the refractory 3, the refractory 3 acts in the direction of peeling the refractory 3 from the gutter 1, so that the brittle refractory is disassembled into a large block. It will be.

On the other hand, when the tangential direction of the rotary drum 18 on the side where the refractory 3 is dismantled and the moving direction B of the gutter are made to coincide with each other, the original cutting edge strongly abuts the refractory at a sharp angle. However, since the tangential direction of the cutting edge 31 on which the dismantling force acts is the inner direction of the refractory 3 of the gutter 1, it is less likely to be dismantled as a large lump, and the refractory 3 is disassembled as a lump. Even if it is caught in the rotary drum 18, the next cutting edge 3
1 is contacted and cracked, and the refractory 3 is made into small pieces. At the position where the cutting edge 31 is separated from the refractory material 3, biting with the refractory material is gradually reduced, and it is prevented that extra stress is applied to the refractory material 3 of the gutter 1 and the refractory material is stably reduced in size. It can be lumped and disassembled.

In disassembling the refractory 3 as described above, when disassembling the rotating drum 18 without moving it in the vertical direction, the disassembling width is the width of the height of the rotating drum 18, and therefore the rotating drum 18 If the height of the gutter 1 is small, this is repeated a plurality of times to complete the dismantling of one side of the gutter 1. Also, when there is a branch gutter on the large gutter 1, the movement of the carriage 6 is stopped and fixed,
Dismantling is performed by tilting the boom 13 or moving the gutter in the width direction.

Incidentally, as shown in FIG. 16 (a), for example, the rotation direction of the rotary drum 18 is set to the refractory 3 of the rotary drum 18.
It is also possible to dismantle the tangential direction on the dismantling side as the trough direction. That is, the tilting motor 21 is operated to move the lower end of the boom 13 to the front in the advancing direction of the gutter 1, and the rotary drum 18 is moved.
Dismantling is done with the tangential direction of as the trough. In this case, it is preferable that the direction of travel of the gutter is the same as the tangential direction of the rotary drum on the disassembly side. In the case of the above dismantling, if the dismantling is performed while the tilting motor 21 is operated and the tilt angle is changed, or if the boom 13 is expanded and contracted together and dismantled, the trolley 6 can be moved once.
Can dismantle the vertical refractory 3 of the gutter 1.

In the above embodiment, as shown in FIG. 16 (a), the rotating direction of the rotating drum 18 is changed to that of the rotating drum 1.
When dismantling the refractory 3 of No. 8 on the tangential direction on the dismantling side as the gutter bottom direction, the tangential direction of the cutting edge 31 on which the dismantling force acts is the inner direction of the refractory 3 of the gutter 1, and therefore FIG.
Unlike the case as shown in (b), it is unlikely that demolition debris will be compressed and disassembled as a large lump, and even if the refractory 3 is lumped and disassembled, the following It is possible to prevent the scraps from coming into contact with the cutting blades 31 to be broken into small pieces of the refractory material 3 and the scraps to be broken into large pieces. Therefore, in dismantling the rotating drum 18, the tangential direction of the rotating drum 18 on the dismantling side of the refractory 3 of the rotating drum 18 is the trough direction, and the advancing direction of the trough is on the dismantling side of the rotating drum 18. It is preferable to use the same as the tangential direction, and in this case, the rotating drum can be moved corresponding to the unevenness caused by the erosion generated on the inner surface of the blast furnace gutter, and the dismantling work can be efficiently performed.

The blast furnace gutter dismantling device may be driven by automatic control or by remote control. That is, in the case of automatic control, the blast furnace large gutter dismantling device monitors the movement of the carriage 6, the shape and thickness of the residual iron 4 in the large gutter 1, or the large gutter 1
Equipped with a measuring device for measuring the shape of the irregular refractory 3 and a control device for controlling the drive of the blast furnace gutter dismantling device, and based on the monitoring result of this monitoring device and the measurement result of the measuring device, While automatically controlling the drive of the dolly 6 to move or stop and fix the drive, the drive of the boom 13, the moving body 10, the swinging motor 20, the tilting motor 21, the casing bit 14, and the rotary drum 18 is automatically controlled to leave the remaining. Iron 4
The cutting groove 15 is formed in the substrate, or the amorphous refractory 3 is disassembled.

When the remote control is performed, a monitoring device for monitoring the movement of the carriage 6, a measuring device for measuring the residual iron 4 in the gutter 1, or the shape of the irregular refractory 3 of the gutter 1 is measured. The blast furnace large gutter dismantling device itself is used as a measuring device to monitor the traveling of the bogie 6 at a position away from the blast furnace large gutter dismantling device, and the residual iron 4 or the amorphous refractory 3 in the large gutter 1 is monitored.
A monitoring device or a measuring device is attached to a position where the trolley can be measured, and the blast furnace large gutter dismantling device receives a remote control signal to move the carriage 6, the moving body 10, the boom 13, and the casing bit 14.
Also, by mounting a control unit for controlling the rotary drum 18, remote control is performed at a position away from the Ohiga 1 depending on the monitoring result of the monitoring device and the measurement result of the measuring device.

As described above, the residual iron 4 of the gutter 1 can be efficiently cut, and when the amorphous refractory 3 is dismantled, it can be efficiently disassembled into small pieces. Further, since the dismantling of the blast furnace gutter is not performed on the blast furnace casting floor but at another factory, it is easy to dispose of dust and the like generated during dismantling, and the dismantling work can be automated without human intervention.
As a result, it is possible to improve the efficiency and shorten the dismantling work of the large gutter 1, free the workers from the dismantling work under high temperature and dust environment, improve the working environment, save labor and downsize the device. Can be done.

[0061]

As described above, according to the present invention, it is possible for a general worker, not a skilled worker, to operate the work mainly by monitoring. Therefore, it is not necessary to secure a full-time operator having special skills, and the number of working personnel can be reduced, so that it becomes easy to secure personnel. Further, since the operation can be performed at a place away from the gutter for disassembling work, the worker can be protected from dust, noise, high heat, etc., and the working environment can be improved.

Further, the casing bit used for dismantling the residual iron and the rotating drum dismantling the amorphous refractory need only be replaced at the tip of the boom, which can reduce equipment costs and minimize installation space. be able to. Both the dismantling of residual iron and the dismantling of unshaped refractory materials can reduce the impact and vibration by using the continuous rotating force compared to the conventional breaker method, so the deformation of the gutter can be prevented and the life of the gutter itself. It can be extended.

When the casing bit used for dismantling the residual iron is used, when the thickness of the residual iron is large, it is possible to form a cutting groove at a short interval for cutting with the casing bit, and to cut the residual iron ingot after that. The removing work can be easily performed, and the work efficiency can be further improved.

In the dismantling of the amorphous refractory, the amorphous refractory to be dismantled by the rotating drum can be made into a small lump, so that the dismantling scraps can be removed efficiently and the automation is facilitated. Have.

[Brief description of drawings]

FIG. 1 is a perspective view when a casing bit for cutting residual iron is attached to a blast furnace large gutter disassembling apparatus according to the present invention.

FIG. 2 is a front view of a main part when a casing bit for cutting residual iron is attached to a blast furnace large gutter disassembling apparatus according to the present invention.

FIG. 3 is a sectional view of a casing bit portion for cutting residual iron according to FIG.

FIG. 4 is a bottom view of the above casing bit for cutting residual iron.

FIG. 5 is a perspective view when a rotary drum is attached to the blast furnace large gutter disassembling apparatus according to the present invention.

FIG. 6 is a front view of a main part when a rotary drum is attached to the blast furnace large gutter disassembling apparatus according to the present invention.

FIG. 7 is a side view of the same.

FIG. 8 is a front view of a second embodiment of the blast furnace large gutter dismantling apparatus main body according to the present invention.

FIG. 9 is a side view of the above.

FIG. 10 is a front view of a third embodiment of the blast furnace large gutter dismantling apparatus main body according to the present invention.

FIG. 11 is a side view of the above.

FIG. 12 is a plan view of the above.

FIG. 13 is a front view of a rotary drum used in the present invention.

FIG. 14 is a sectional view of the above rotary drum.

15 (a) and 15 (b) are explanatory views showing a state in which an amorphous refractory material is disassembled by a rotating drum, FIG. 15 (a) is an explanatory view according to the present invention, and FIG. 15 (b) is a reference explanatory view.

16A and 16B are explanatory views showing a state in which an amorphous refractory material is disassembled by inclining a rotary drum, FIG. 16A is an explanatory view according to the present invention, and FIG. 16B is a reference explanatory view.

FIG. 17 is a perspective view of a disassembly device using a conventional breaker.

FIG. 18 is a perspective view of a disassembly device using a conventional shovel.

[Explanation of symbols]

 1 Ohi 3 Unshaped refractory 4 Remaining iron 5 Traveling rail 6 Bogie 7 Support member 8 Pillar member 9 Arm 10 Moving body 11 Hydraulic cylinder for moving moving body 12 Rotary drive unit 13 Boom 14 Casing bit for dismantling residual iron 15 Cutting groove 16 Cutting member loading cart 18 Rotating drum 19 Line for stopping rotation 20 Motor for tilting 21 Motor for rocking 22 Rotating shaft 23 Bearings 24, 25 Hydraulic cylinder 26 Tilt frame 27 Shaft 28 Spindle 29 Tilt motor 30 Rocking motor 31 Cut off blade

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayuki Uchida 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Kazuo Kida 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture Nippon Steel Corporation Machinery & Plant Division

Claims (9)

[Claims] Claim: What is claimed is: 1. A blast furnace large gutter dismantling apparatus for removing a blast furnace gutter from a hearth floor to dismantle a gutter refractory, and a gutter moving member on which the gutter is placed and movable in the gutter longitudinal direction, and arranged so as to straddle the gutter. A supporting member and a cutting member which is supported by the supporting member substantially vertically toward the gutter and which is rotated by a rotary driving body and can move or tilt at least in the vertical direction and the width direction of the gutter. A blast furnace large gutter dismantling device. 2. A blast furnace large gutter dismantling apparatus, wherein a casing bit for cutting residual iron is used as the cutting member according to claim 1. 3. A blast furnace large gutter disassembling apparatus, wherein the cutting member according to claim 1 is a rotary drum for dismantling a refractory having a crushing type cutting edge. 4. The blast furnace gutter disassembling apparatus according to claim 1, wherein a casing bit for cutting residual iron as a cutting member and a rotary drum for disassembling a refractory can be replaced. 5. The blast furnace large gutter disassembling apparatus according to claim 3, wherein the crushing-type cutting blade provided in the rotary drum is arranged in a spiral shape so as to be directed toward the tip end as the rotary drum rotates. Blast furnace large gutter dismantling device. 6. In a blast furnace large gutter dismantling method of rotating a rotary drum having a crushing type cutting blade to dismantle the refractory material of the gutter, the tangential direction of the cutting blade contacting the refractory material and the relative movement direction of the gutter are the same. As described above, the blast furnace large gutter disassembling method is characterized in that the rotating drum rotating direction and the gutter moving direction are selected to dismantle the gutter. 7. A blast furnace large gutter dismantling method for rotating a rotary drum having a crushing type cutting blade to dismantle a refractory material in a gutter, so that the tangential direction of the cutting blade in contact with the refractory material is directed toward the gutter bottom direction. A method for dismantling a gutter of a blast furnace, which comprises disassembling a gutter by selecting an inclination angle and a moving direction of the gutter in a gutter longitudinal direction of a rotating drum. 8. The method of dismantling a blast furnace gutter according to claim 6 or 7, wherein a rotating drum having a crushing type cutting blade is used for the rotating drum which is arranged in a spiral shape toward the tip direction with the rotation of the rotating drum. A method for dismantling a blast furnace gutter, which is characterized in that 9. In a blast furnace large gutter dismantling method for rotating a rotating drum having a crushing type cutting blade to dismantle the refractory material in the gutter, the tangential direction of the rotating drum on the side where the refractory material is disassembled matches the relative movement direction of the gutter. A blast furnace large gutter dismantling method, characterized in that the blast furnace large gutter dismantling method according to claim 7 is also used when dismantling the gutter.