JPH06145747A - Device for removing dismantled scrap in molten iron tapping trough in blast furnace and method therefor - Google Patents

Abstract

PURPOSE:To improve a working environment and also, to shorten the working time, in repairing work for refractory applied on the inner surface of a trough. CONSTITUTION:This removing device for dismantled scrap in the molten iron tapping trough is composed of a trough placing truck 6 for placing the molten iron tapping trough 1 for blast furnace, a plowing means 7 for scraping the dismantled scrap of the refractory 4 applied on the inner surface of the trough 1, a tilting means 18 for tilting the plowing means 7 in the longitudinal direction of the trough 1, a suction means 8 for sucking the dismantled scrap of the refractory 4 applied on the inner surface of the trough 1 and a shifting means for shifting the suction means 8 along the inner surface in the width direction of the trough 1. At the time of repairing the deteriorated refractory on the inner surface of the trough by this device, the repairing work can be executed by shifting the trough to the suitable working place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work for repairing a refractory material on the inner surface of a gutter which has deteriorated due to passage of molten pig iron and slag, and in particular to dismantling of a gutter used in a blast furnace casting floor. The present invention relates to a scrap removing device and a scrap removing method.

[0002]

2. Description of the Related Art Pig iron melted at a high temperature from a blast furnace passes through a gutter having a length of about 20 m, but since hot gut iron and slag at a high temperature flow in this gutter, it was installed on the inner surface of the gutter. Refractory wear and chemical degradation. Also,
Even by repeating cooling by switching the tap hole,
The refractory built inside the gutter deteriorates.

When the refractory material applied to the inner surface of the blast furnace tappipe is deteriorated, the deteriorated refractory material is disassembled and removed, and then a new refractory material is applied to the inner surface of the gutter. ing.

To dismantle the deteriorated refractory material, as shown in FIGS. 5 and 6, a backhoe 2 is provided above the blast furnace tap pipe 1.
After installing a breaker 3 at the tip of the backhoe 2 and crushing the refractory material 4 installed on the inner surface of the gutter 1 (Fig. 5), the shovel 5 is attached to the tip of the backhoe 2 to scrape the debris. (Fig. 6). In addition, work where the backhoe 2 is difficult to perform requires manual work.

The above-mentioned dismantling debris removal work must be carried out in a high temperature atmosphere due to the heat of the gutter 1, and it is a work in a bad environment in which dust or noise is generated. there were. Further, when the width of the gutter 1 is narrow, the work is difficult and it takes a long time.

As a method for treating dismantled scraps generated by dismantling work, Japanese Patent Application Laid-Open No. 54-132408 discloses a method of suctioning and removing dismantled scraps. However, in this suction removal method, the diameter of the suction nozzle cannot be increased so much that demolition debris that is somewhat large cannot be removed. Further, when the demolition debris is clogged in the suction path, the demolition debris that has been clogged must be removed each time, which makes efficient work impossible.

The present inventor has tried the above-mentioned suction removal method, but the suction negative pressure is 10,000 mmAq and the air volume is 50 m ^3.
Diameter of 30 mm, even with a high-performance device of / min
The above demolition debris could not be removed. Also, it has been found that the suction duct is often clogged and cannot be used on a commercial basis.

[0008]

When repairing a deteriorated refractory on the inner surface of the gutter, the conventional method described above not only requires work in a high temperature atmosphere, but also generates dust and noise. The problem of occurrence occurred, and the working environment was extremely poor. Moreover, the work efficiency was poor because the work required a long time.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and in repairing refractories on the inner surface of a gutter,
It aims to improve the working environment and shorten the working time.Moveable gutter loading dolly on which the blast furnace tap gutter is placed, and carding to remove the demolition waste of the refractory constructed on the inner surface of the gutter. Means, tilting means for tilting the carding means in the longitudinal direction of the gutter, suction means for sucking demolition waste of refractory material installed on the inner surface of the gutter, and the suction means along the inner surface in the width direction of the gutter. The present invention provides a device for removing demolition debris from a blast furnace tappipe, which comprises moving means for moving.

Further, as the carding means, a device having an adjustable carding width is provided in one stage, or a plurality of cards having different carding widths are provided, so that a device for removing demolition debris more reliably is provided. It is provided.

Further, in removing demolition debris from the blast furnace tappipe, the blast furnace tappipe is placed on a gutter mounting trolley, the carding means and the suction means are positioned in the gutter, and the gutter inner surface is shaped according to the shape. While tilting the carding means by the tilting means and moving the suction means in the width direction of the gutter by the moving means, the gutter mounting carriage is caused to travel in the longitudinal direction to remove the large amount of the scraps of refractory material in the gutter. The lumps are removed by a carding means, and the small lumps and powders are removed by a suction means.

Further, the carding width of the carding means is adjusted according to the width of the gutter so that the disassembly scraps can be removed more reliably.

[0013]

[Operation] First, the blast furnace tappipe is placed on the gutter loading trolley, and the refractory material installed inside the gutter is disassembled. Next, the carding means is located in the blast furnace tap trough where the refractory is dismantled, and the gutter loading carriage is moved in the longitudinal direction while tilting the carding means by the tilting means according to the shape of the gutter inner surface. When,
Large pieces of refractory demolition debris in the gutter can be removed. In addition, when the gutter mounting truck is moved in the longitudinal direction while the suction means is located in the gutter and the suction means is moved in the width direction of the gutter by the moving means, the small pieces of the refractory scraps in the gutter are removed. The lumps and powders can be removed by suction.

Further, when the carding means is composed of the main carding means and the sub carding means, the carding width is adjusted by moving the sub carding means according to the width of the gutter. The demolition debris removal work can be reliably performed. It is also possible to remove dismantling debris by running the gutter loading carriage in the longitudinal direction while simultaneously removing the large lumps by the carding means and the small lumps and powders by the suction means.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view of a demolition debris removing device according to an embodiment of the present invention, FIG. 2 is a front view of a carding means, FIG. 3 is a front view of an auxiliary carding means, and FIG. 4 is a front view of a suction means. Is.

The demolition debris removing device comprises a gutter mounting carriage 6 on which the blast furnace tapping gutter 1 is mounted, and a carding device 7 functioning as a carding means.
And the suction device 8 functioning as suction means is a main component. The gutter mounting carriage 6 includes a pair of gutter support bases 9 in the longitudinal direction.
And a wheel 10 is provided at the bottom.

The gutter 1 removed from the blast furnace casting floor is mounted between the gutter support bases 9 provided on the gutter mounting carriage 6. Gutter loading cart 6
If the gutter 1 mounted above is fixed by an appropriate fixing means, it is possible to prevent the gutter 1 from moving and dropping from the trolley during the dismantling debris removal operation. This fixing means
Although not shown, for example, a fixing screw may be inserted into the gutter support 9 and the tip of the fixing screw may be screwed to a fixing screw boss portion provided on the outer surface of the gutter.

In order to move the gutter loading carriage 6, the carriage is placed on a rail 11 laid on the floor of the work place, and wheels 10 are provided.
Attach a drive device 12 such as a motor to the
It may be pulled by a separately provided pulling device.

The carding device 7 and the suction device 8 are supported by a gate type frame 13 provided so as to straddle the gutter 1. As shown in FIGS. 1 and 2, the carding device 7 includes a gate-shaped frame 13
A pair of support rails 14 in the width direction below, and a support frame 15 is movably suspended between the support rails 14,
A tilting shaft 16 is rotatably mounted between the support frames 15 in the width direction, and a tilting rod 17 is provided at an approximately center of the tilting shaft 16 so as to move upward.
The rod 19 of the air cylinder 18 functioning as tilting means is rotatably attached to the upper end of the tilting rod 17, and a carding plate 20 is extended downward from the tilting shaft 16 to extend the carding Comb teeth 21 are attached to the lower end of the plate 20. The above-mentioned air cylinder 18 is attached to the upper side of the gate-shaped frame 13 and substantially at the center in the width direction.

A pair of auxiliary comb-teeth supporting members 22 are provided on the lower portion of the back side of the above-mentioned combing plate 20, and auxiliary comb-teeth 23 are slidably attached to each of the auxiliary comb-teeth supporting members 22. Auxiliary comb tooth moving cylinders 24 are rotatably attached to both side surfaces of the tilting rod 17, and the tip of the rod 25 of the auxiliary comb tooth moving cylinder 24 has a crank member on the back side of the cardboard 20. It is connected to one end of a crank member 27 rotatably attached to the mounting portion 26. The other end of the crank member 27 is rotatably attached to the base end of the auxiliary comb tooth 23 described above.

Therefore, the auxiliary comb tooth moving cylinder 24
When the rod 25 is extended, the auxiliary comb teeth 23 slide outward while being supported by the auxiliary comb teeth supporting member 22, and the combing surface formed by the comb teeth 21 and the auxiliary comb teeth 23 expands. . On the other hand, the auxiliary comb tooth moving cylinder 2
When the rod 25 of No. 4 is retracted, the auxiliary comb teeth 23 slide inward while being supported by the auxiliary comb teeth supporting member 22, and the combing surface formed by the comb teeth 21 and the auxiliary comb teeth 23 becomes narrow. Become.

At the upper end of the support frame 15 described above,
The wheels 28 are attached, and the wheels 28 are attached to the support rails 14.
The support frame 15 is suspended so that they contact each other. Further, the support frame 15 is connected to the rod 30 of the carding device moving cylinder 29 attached to the upper portion of the gate-shaped frame 13.

Therefore, the cylinder 29 for moving the carding device
By operating the, the carding device 7 can be moved in the width direction of the gutter 1. For example, when the rod 30 is extended, the carding device 7 moves leftward in FIG. 2, and when the rod 30 is retracted, the carding device 7 moves rightward in FIG.

The operation of collecting dismantled scraps by the above-described collecting device 7 will be described. Place the blast furnace tap iron gutter 1 on the gutter mounting carriage 6,
After performing the dismantling work of the refractory 4 constructed on the inner surface of the gutter, the gutter mounting carriage 6 is moved to a position where the dismantling debris removing work of the refractory 4 is performed. Here, the carding device 7 is positioned in the trough, and the carding device moving cylinder 29 is operated to move the carding device 7 to an appropriate position in the width direction of the gutter 1 and the air cylinder 1
8 is operated to tilt the carding device 7 along the dismantling surface of the refractory 4. At this time, in the case of the carding device 7 provided with the auxiliary comb teeth 23, the auxiliary comb tooth moving cylinder 24 is further operated to move the auxiliary comb teeth 23 to an appropriate position, and the carding surface is guttered 1 To the width of.

In this state, by moving the gutter mounting carriage 6 in the longitudinal direction, the debris on the inner surface of the gutter can be removed. The removed scraps are tilted to the scooping position (FIG. 1A) by further operating the air cylinder 18, and the comb teeth 21 are picked up along the slope of the inner surface of the gutter and placed in the gutter. It is collected in a bucket 31 provided at one end of the carriage 6. When the end of the inner surface of the gutter is not inclined, the picking operation of the carding device 7 may not be performed. When the comb teeth 21 collide with the bottom or side of the gutter 1, the air cylinder 18 is operated to tilt the carding device 7 to the escape position (FIG. 1C), and the comb teeth 21 are moved from the inner surface of the gutter. After the release, the carding device 7 is returned to the operating position (FIG. 1B) and the carding operation is continued.

The diameter of the demolition debris to be removed by the above-mentioned carding device 7 is determined by the diameter of the demolition debris that can be removed by the suction device 8 described later, but in general, comb teeth are used to remove a large lump of 30 mm or more. 21 is provided. The interval between the comb teeth 21 may be changed appropriately according to the ability of the suction device 8.
Alternatively, when many of the dismantling wastes have a large diameter, the comb teeth for removing the large lumps may be separately provided, and the comb teeth may be formed in two stages. In accordance with the same idea, comb teeth having different comb tooth intervals may be multistaged to improve the efficiency of carding. Further, in the above-described embodiment, the combing portion of the combing device 7 is formed by the comb teeth 21, but the combing portion is not limited to the comb teeth 21 and any device may be used as long as it can remove debris, for example, The plate-shaped member may be provided with slits at appropriate intervals.

The suction device 8 is, as shown in FIGS. 1 and 4,
The suction pipe traversing device 32 is attached to the upper frame of the gate-shaped frame 13 and is movable in the width direction of the gutter 1, and the suction pipe elevating device 33 is provided downward from the suction pipe traversing device 32. A suction pipe 34 is attached to the lower part of the. In addition, the upper portion of the suction pipe 34 has the gate-shaped frame 13
It is supported by a suction pipe support bar 35 which is bridged between them.

In the suction pipe traversing device 32, for example, a traversing carriage 36 is suspended on the gate type frame 13, a motor 37 is attached to the upper portion of the gate type frame 13, a worm gear 38 is attached to a rotating shaft of the motor 37, and a worm gear 38 is attached. It is configured to be meshed with a rack gear (not shown) provided on the traverse vehicle 36. Therefore, the suction tube traversing device 32 can be moved in the width direction of the gutter by driving the motor 37.

The suction tube elevating device 33 comprises, for example, a cylinder 39. When the rod 40 of the cylinder 39 is extended, the suction tube 34 can be moved downward, while when the rod 40 is retracted, the suction tube 34 is moved upward. Can be moved. The base end of the suction pipe 34 described above is connected to the collector and the blower via the hose 41.

The tip of the suction pipe 34 is a suction port 42. If a rotary brush is attached to this suction port 42, air necessary for suction transfer of powder or the like can be sucked from the gap between the brushes and the brush can be sucked. The elasticity can be used to adjust the gap by the pressing force, and the suction efficiency can be improved. This rotating brush has a suction device 8
Can be rotated at an appropriate position, for example, by a turning motor provided in the suction tube elevating device 33.

The operation of collecting dismantled waste by the above-mentioned suction device 8 will be described. The suction device 8 is positioned in the trough from which the large pieces of demolition waste have been removed by the carding device 7. The position of the suction device 8 in the width direction can be determined by operating the suction pipe traversing device 32, and the position in the vertical direction can be determined by operating the suction pipe elevating device 33.

In this way, the suction pipe traversing device 32 or the suction pipe elevating device 33 is operated to move the suction pipe 3 along the inner surface of the gutter.
While moving the suction port 42 at the tip of 4, the gutter loading cart 6
By moving in the longitudinal direction, it is possible to suck a small lump or powder of dismantled waste left on the inner surface of the gutter. The sucked small pieces or powders of the demolition waste are sent to the collecting device via the hose 41.

The suction capacity of the suction device 8 is determined by the suction negative pressure, the suction air volume, the diameter of the suction hose, and the like. The suction capacity of the suction device 8 of this embodiment is, for example, 150 m when the diameter of the suction hose is 150 m.
m, a negative pressure of 5000 mmAq and an air volume of 50 m for the purpose of obtaining 50 m / sec at the average wind speed of the suction port 42.
^{3. It} uses a Roots blower of 75 kW and is composed of incidental equipment such as a separator, a bag filter collector, and a silencer. According to this equipment configuration, there are some fluctuations due to the particle size distribution of dismantled waste and the state of dispersion, but 6 m ³
A suction capacity of / hr can be obtained. Therefore, a lump having a diameter of up to 50 mm can be sucked, and the carding device 7
It is possible to easily remove by suction any small particles or powder of dismantled scraps that remain after the carding.

The removal of large lumps by the carding device 7 and the removal of small lumps and powder by the suction device 8 have been described separately.
These operations can be performed at the same time. Further, the dismantling debris removal work was carried out by moving the gutter loading trolley 6 in the longitudinal direction, but the gutter loading trolley 6 was fixed and the carding device 7 was used.
Alternatively, the suction device 8 may be moved in the longitudinal direction of the gutter 1. In addition, each of the above-mentioned operations can be performed by remote control from an operation room or the like installed at an appropriate position in the workplace. Therefore, in the work of removing demolition debris,
Even if dust or noise is generated, the worker can work in a good environment.

[0035]

As described above, according to the present invention, the carding means is located in the blast furnace tappipe after the refractory is dismantled, and the carding means is tilted by the tilting means according to the shape of the inner surface of the gutter. When the gutter-carrying vehicle is run in the longitudinal direction while the above is performed, large pieces of the demolition debris of the refractory in the gutter can be removed. In addition, when the gutter mounting truck is moved in the longitudinal direction while the suction means is located in the gutter and the suction means is moved in the width direction of the gutter by the moving means, the small pieces of the refractory scraps in the gutter are removed. The lumps and powders can be removed by suction.

According to the above-mentioned structure, when repairing a deteriorated refractory on the inner surface of the gutter, the gutter can be moved to an appropriate work place for the repair work, so that it is necessary to work in a high temperature atmosphere. Disappears. In addition, compared with the method in which workers directly operate equipment such as backhoe to remove demolition debris,
Even if dust or noise occurs, it is possible to minimize the effect on workers.

Therefore, it is possible to comfortably work in a good working environment without being forced to work in a bad environment where dust and noise are generated in a high temperature atmosphere as in the conventional case. Furthermore, since work can be performed by a series of mechanized steps, work time can be shortened,
Moreover, the number of workers can be reduced, and the work efficiency can be significantly improved.

[Brief description of drawings]

FIG. 1 is a side view of a demolition debris removing apparatus according to an embodiment of a demolition debris removing apparatus and method of a blast furnace tappipe according to the present invention.

FIG. 2 is a front view showing the carding means of the dismantling debris removing apparatus according to one embodiment of the demolition debris removing apparatus and method of the blast furnace tapping gutter according to the present invention.

FIG. 3 is a front view showing an auxiliary carding means of the carding means of the demolition debris removing apparatus according to an embodiment of the demolition debris removing apparatus and method of the blast furnace tapping gutter according to the present invention.

FIG. 4 is a front view showing a suction means of a demolition debris removing device according to an embodiment of a demolition debris removing device and a removing method for a blast furnace tappipe according to the present invention.

FIG. 5 is an explanatory view showing a state in which a refractory material on the inner surface of the gutter is being disassembled in the conventional device and method for dismantling demolition debris from a blast furnace tappipe.

FIG. 6 is an explanatory diagram showing a state in which a refractory demolition debris removal work is being performed on the inner surface of the gutter in the conventional demolition debris removal device and method for a blast furnace tappipe.

[Explanation of symbols]

 1 Blast furnace tap iron gutter 6 Gutter mounting trolley 7 Carding device 8 Suction device 18 Air cylinder 21 Comb teeth 23 Auxiliary comb teeth 37 Motor

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kazuhiro Iwakuma 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture, Nippon Steel Plant Design Co., Ltd. Steel Research Co., Ltd. Central Research Division

Claims (4)

[Claims] Claim: What is claimed is: 1. A movable trough-carrying trolley on which a blast furnace tappipe is placed, a carding means for combing demolition debris on the inner surface of the gutter, and the cardboarding means in the longitudinal direction of the gutter. And a moving means for moving the suction means along the inner surface of the gutter in the width direction of the gutter. Demolition debris removal device for blast furnace tappipe. 2. The apparatus for removing demolition debris from a blast furnace tap gutter according to claim 1, wherein the carding means is one stage having a carding width adjustable,
Alternatively, an apparatus for removing demolition debris from a blast furnace tap pipe, which is characterized in that a plurality of stages having different carding widths are provided. 3. A blast furnace tapping gutter is placed on a gutter mounting carriage, a carding means and a suction means are positioned in the gutter, and the carding means is tilted by the tilting means in accordance with the shape of the gutter inner surface, and the moving means is also provided. While moving the suction means in the width direction of the gutter, run the gutter mounting carriage in the longitudinal direction, remove the large lumps of the demolition waste of the refractory in the gutter by the carding means, and remove the small lumps and powder. A method for removing demolition debris from a blast furnace tap gutter, characterized in that the content is removed by a suction means. 4. A blast furnace tapping gutter is placed on a gutter mounting trolley, a carding means and a suction means are located in the gutter, and the carding means is tilted by the tilting means in accordance with the shape of the gutter inner surface, and the gutter Adjust the carding width according to the width, and while moving the suction means in the width direction of the gutter by the moving means, run the gutter mounting truck in the longitudinal direction to remove the largest amount of refractory scraps in the gutter. A method for removing demolition debris from a blast furnace tappipe, comprising removing lumps by a carding means and removing small lumps and powders by a suction means.