JPH05177318A - Device for repairing tundish cover for continuous casting - Google Patents

Abstract

PURPOSE:To simplify repairing of a cover accompanied with dust and high temp. by providing a rotary holding device for rotating the tundish cover and holding this cover to the vertical direction, a chisel for cutting off the stuck material and a nozzle for injecting monolithic refractory and remote-operating the chisel and the nozzle. CONSTITUTION:The rotary holding device for rotating the tundish cover 1 at almost 90 deg. angle and holding the surface of a refractory 3 to the vertical direction, the chisel 6 enabling cut-off of the stuck material and the injecting nozzle 9 enabling the injection of the monolithic refractory are provided, and by operating the chisel 6 at a place apart from the chisel, the shifting of the position to the upper and lower, the right and left and the front and rear directions to the repairing surface can be executed. Further, by operating the injecting nozzle 9 at a place apart from the nozzle, the operation for injecting the monolithic refractory and also the shifting of the position to the upper and lower, the right and left and the front and rear directions can be executed.

Description

Detailed Description of the Invention

[0001]

[Industrial application] When casting is completed in continuous casting, the surface of the refractory material of the tundish cover is inspected and repaired and used for the next casting. The present invention relates to a tundish cover repair device in this case.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of a conventional repair work for a refractory material of a tundish cover. (A1) is a tundish 2 equipped with a tundish cover 1 in a state in which casting is completed. The cover 1 is hung by, for example, hanging a hook of a hoist (not shown) on a hanging portion 4 provided on the tundish cover 1, and (A2) ) Remove from tundish 2 as shown in). Reference numeral 21 in the figure denotes an opening for pouring the molten metal in the ladle.

The upper surface and four circumferences of the cover 1 are made of a steel skin, and the lower surface is made of a fireproof material 3. To repair the refractory material 3 of the cover, turn over the cover 1 shown in (A2) to the state shown in (A3).
(A4) As shown in the figure, the adhering material around the damaged part 5 of the refractory material 3 and the irregular-shaped refractory material 3 are partially shaved using the portable chisel 6, and the shavings 7 are removed from the air hose 8, for example, as shown in the (A5) figure. Blow away with air, and spray the irregular shaped refractory material from the manual spray nozzle 9 as shown in (A6).
As shown in (A7), the cover 1 is rotated to the original state shown in (A2) and mounted on the tundish 2 to complete the process. Cover 1
Tundish 2 equipped with is for the next casting,
It is installed in a tundish and the inside of the tundish is preheated to a high temperature.

If the steps (A1) to (A7) in FIG. 4 can be performed quickly and in a short time, the cover 1 is at a sufficiently high temperature in the state shown in (A7) because the cooling time is short. Therefore, when the tundish 2 equipped with this cover is preheated for the next casting, the preheating time can be shortened and the preheating cost can be reduced. Further, if the repair time of the cover is shortened or the preheating time is shortened, since the number of the stocked covers is reduced, a vast yard is not required for the repair and preheating, and the factory building can be effectively used.

However, the conventional method shown in FIG. 4 is (A2)
The process of turning the tundish cover from the figure to (A3) is inefficient because it is carried out by a crane without a special jig, and the scraping of deposits in (A4) is done manually by the operator. It is difficult to carry out at high temperature because it is necessary to cool it sufficiently and it takes a long time. When removing shavings in (A5) figure at high temperature, shavings at high temperature scatter. Therefore, it is difficult for the worker to spray the irregular shaped refractory material shown in (A6) at high temperature, and the efficiency is low. It is inefficient to perform, and for this reason it is difficult to repair the refractory material of the cover quickly and at high temperature.

[0006]

As described above, conventionally, the refractory of the cover has been repaired by hand only after the cover has been sufficiently cooled. An object of the present invention is to provide a repairing device for a continuous casting tundish cover, which can complete repairing at high temperature in a short time without cooling the cover after casting.

[0007]

FIG. 1 is an explanatory view of an example of an apparatus of the present invention, (A) is a plan view and (B) is a front view. The present invention will be specifically described with reference to FIG. Figure 1
In (B), 1 is a tundish cover, which is rotated by about 90 ° in the direction indicated by the solid line arrow 15 from the state shown by the dotted line so that the surface 3 of the refractory material becomes vertical (for example, vertical). The state shown by the solid line is maintained, and the refractory material is repaired in this state. When the repair is completed, rotate in the direction of the dotted arrow 15 to restore the original state.

As the rotary holder 10, various kinds of known mechanical, electrical and hydraulic means can be used. For example, the hook 12 is provided on the iron skin on the upper surface of the cover, and the clamp 13 is provided. The entire tilting arm that is held is rotated in the direction of the dotted arrow 15 about the axis P, the clamp 13 is moved in the direction of the arrow 14 to hold the hook 12, and the entire tilting arm that holds the hook 12 is drawn around the axis P in the solid line. 9 in 15 directions
When the cover 1 is rotated by 0 °, the cover 1 is maintained from the state indicated by the dotted line to the state indicated by the solid line. Reference numeral 16 in the drawing is an example of a tilting cylinder that rotates the entire tilting arm, and 11 in the drawing is an example of a chain conveyor that conveys the cover 1 to the apparatus of the present invention.

In the present invention, as shown in FIG. 1B, the refractory material is repaired by holding the surface 3 of the refractory material vertically (for example, vertically). The reason for this will be explained. When the temperature of the surface 3 of the refractory material is low, the refractory material can be repaired with the surface 3 of the refractory material horizontal (horizontal) as described in FIGS. 4 (A4) to (A6). When the temperature of the surface 3 is high, the hot air rises in the method of FIGS. 4 (A4) to (A6), and the working environment is bad. When the surface 3 of the refractory material is made vertical (for example, vertical) as shown in FIG. 1B, even if hot air rises, the hot air must heat the power transmission part of the chisel 6 and the opening / closing operation part of the blowout nozzle 9. And therefore less likely to damage them. In the present invention, while the temperature of the surface 3 of the refractory material is high, the chisel 6 and the blowing nozzle 9 are operated by a remote operation, but the chisel and the blowing nozzle that can be operated at a remote location are complicated. Since the power transmission section and the opening / closing operation section are included, the method of FIGS. 4 (A4) to (A6) easily causes a failure of the power transmission section and the opening / closing operation section due to hot air. As shown in FIG. 1B, when the surface of the refractory material is made vertical (for example, vertical), these failures are unlikely to occur.

In the present invention, a lateral chisel 6 capable of scraping off adhered substances and a lateral spray nozzle 9 capable of spraying an irregular shaped refractory are used. The chisel 6 is constructed so that it can be moved up and down, left and right, and back and forth while it is operated to scrape off adhered substances by operating it at a remote place. Further, the spray nozzle 9 is also configured so that it can be operated to spray the irregular-shaped refractory material at a remote place and can be moved up and down, left and right, and back and forth.

Operation of the chisel or spray nozzle by remote operation can be readily accomplished using conventional mechanical, electrical and hydraulic means. The pedestal 17 on which the chisel 6 and the spray nozzle 9 are arranged in FIG. The column 18 is mounted on a carriage 19 which is supported by wheels 19 'and is movable left and right. The carriage 19 is mounted on a carriage 20 supported by wheels 20 'and movable back and forth. It goes without saying that the vertical movement amount of the gantry 17, the horizontal movement amount of the trolley 19 and the front and rear movement amount of the trolley 20 can be controlled with high precision by known mechanical, electrical and hydraulic means. Stand 17 and cart 1
Although the 9 and the trolley 20 have been described, it is clear that these movements can be accomplished manually or by other known means.
Accordingly, the invention includes other known moving devices by other means.

FIG. 2 is a perspective view for explaining refractory material repair using the apparatus of the present invention. In the present invention, with the surface 3 of the refractory material held vertically, the attached material around the damaged portion is scraped off using the chisel 6. At this time, since the shavings fall downward,
The removal of the shavings described in FIG. 4 (A5) is unnecessary, and even when the temperature of the surface 3 of the refractory material is high, the high-temperature shavings do not scatter. In addition, when spraying amorphous fireproof material,
In (A6), it is necessary to remove the rebound slag, but in the present invention, the rebound slag falls, so special removal work is unnecessary.

According to the present invention, even by a manual method by eye measurement,
Although spray repair is also possible, a position control device for arranging the chisel and the spray nozzle at the position of the partition number can be provided by inputting the partition number allocated on the surface of the tundish refractory material. FIG. 3 is an explanatory diagram of arranging the chisel 6 at a desired position by using the position control device. The position control device stores each position on the YZ plane as a combination of a number assigned to the Y axis and a number assigned to the Z axis. The YZ plane is approximately parallel to the surface of the refractory material 3 of the tundish cover. An example of scraping off the adhered matter in the hatched portion of the refractory material 3 of the cover will be described. Y = in the shaded position
The division numbers of 6, Z = 5 are assigned. When the division number of (Y = 6, Z = 5) is input to the position control device, the position control device moves the gantry 17 and the dolly 19 of FIG. 1, and the chisel 6 in FIG. Set the position to When the chisel 6 is operated at this position, it is possible to scrape off the deposits in the shaded area. The position control of the spray nozzle can be performed by the same means.

In the present invention, it is also possible to provide a scraping depth control device for controlling the scraping depth of the deposit by the chisel 6 by inputting the scraping depth. The shaving depth control device stores the shaving depth by the number attached to the X axis in FIG. 3, for example. X for position control device
When the number attached to the axis is input, the position control device moves the trolley 20 of FIG. 1, and the working chisel 6 scrapes off the deposit having a depth corresponding to the input X-axis number.

In the present invention, it is also possible to provide a spray amount control device for controlling the spray amount of the irregular-shaped refractory by inputting the spray amount. This spray amount control device can be achieved by arranging, for example, a flow meter of a known irregular-shaped refractory and a shut-off valve that operates according to an instruction of the flow meter in the pipe of the spray nozzle 9 of FIG. In the above, the shaving and the spray repair are described by the input method in advance, but the operation can be performed in cooperation with the surface sensor device.

The second repairing device of the present invention is a repairing device which is further provided with the position control device, the cutting depth control device and the spray amount control device in addition to the repairing device described in FIG. Using this repair device, the inspector can fully repair the cover refractory by inputting the damage status of the cover refractory or by the cooperation with the surface sensor device. Even when the temperature of the refractory material is high, the refractory material of the cover can be quickly repaired without being hindered by high heat.

[0017]

By using the apparatus of the present invention, the repair of the high temperature continuous casting cover immediately after the end of casting can be completed at a high temperature in a short time. As a result, when the tundish is preheated for the next casting, the preheating time can be shortened and the preheating cost can be reduced. Further, when the device of the present invention is used, the rotation rate of the cover is increased, the number of regular covers is reduced, and a wide yard for repairing or preheating is unnecessary, so that the factory building can be effectively used. Further, by using the device of the present invention, the repair work of the tundish cover in a repair environment involving dust and high heat can be greatly simplified.

[Brief description of drawings]

1 is an explanatory view of an example of the device of the present invention, FIG. 2 is a perspective explanatory view of repair using the device of the present invention, FIG. 3 is an explanatory view of the operation of an example of the position control device of the present invention, and FIG. It is explanatory drawing of the example of the conventional repair of a dish cover.

[Explanation of symbols]

1: Tundish cover, 2: Tundish,
3: Fireproof material for tundish cover, 4: Hanging part,
5: Damaged part of refractory material, 6: Chisel, 7: Shavings,
8: Air hose, 9: Spray nozzle, 10: Rotating holder, 11: Chain conveyor, 12: Hook, 1
3: Clamp, 16: Tilt cylinder, 17: Stand,
18: prop, 19: dolly, 20: dolly, 21:
An opening for pouring molten metal into a ladle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masataka Kawano 1-1, Higashihama-cho, Hachimansai-ku, Kitakyushu City, Fukuoka Prefecture Kurosaki Ceramics Co., Ltd. Company Kimitsu Works Kurosaki Furnace Industry Co., Ltd. Kimitsu Works

Claims (2)

[Claims] 1. A rotary holder for rotating a tundish cover by about 90 ° to vertically hold the surface of the refractory material, a chisel capable of scraping off adhered substances, and a spray of irregular shaped refractory material. The spray nozzle can be moved up and down, left and right, and back and forth with respect to the surface to be repaired by operating it at a distant place, and the spray nozzle has an irregular shape when operated at a distant place. Repair device for tundish cover for continuous casting, characterized in that it can be operated to spray refractory material and move up and down, left and right, and back and forth. 2. The tundish cover repairing apparatus for continuous casting according to claim 1, further comprising inputting a division number assigned to the surface of the refractory material of the tundish, whereby the chisel and the spray nozzle are provided with the division number. A position control device arranged at a position, a scraping depth control device for controlling the scraping depth of the adhered substance at the position of the division number by the chisel by inputting the scraping depth, and a spraying amount by inputting the spraying amount. A device for repairing a tundish cover for continuous casting, characterized in that it has a spray amount control device for controlling the spray amount of the irregular refractory material to the position of the division number.