JPH0781788B2 - Demolition device for molten steel ladle indefinite refractory - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for disassembling a molten steel ladle indeterminate refractory material such as a ladle.

Conventional technology Conventionally, to dismantle the residual material and slag of irregularly shaped refractory that remain in the pot after using a ladle ladle such as a ladle, a scaffolding inside the pot was used by several workers. I went in and disassembled the sintered layer on the surface with an air breaker or pick. It is also known to use a backhoe to dismantle, but only rough dismantling can be done, and if it is broken too much, the amount of refractory used increases, and if the sintered layer is left, the newly constructed material will have poor adhesion. It was.

Problems to be Solved by the Invention Therefore, it takes 5 days to dismantle the molten steel ladle,
There was a growing demand for pot repairs and improvements in the usage cycle, and because of the high heat and dusty work environment, work efficiency did not rise, and labor saving and rationalization of dismantling work was demanded. It was

By the way, Japanese Patent Application Laid-Open No. 61-114083 proposes an inner peripheral surface cutting device such as a melting furnace whose inner peripheral surface is lined with a refractory material.

However, the above is to remove the refractory lining by grinding with a cutting tool such as a gear cutter, the dismantling efficiency is not good, and the suction pipe is arranged to discharge the cutting waste. As described above, only fine powder particles such as polishing dust can be discharged.

Means for Solving the Problems The present invention has been made in view of the above points, and in order to solve the above problems, a dismantling device for disassembling an amorphous refractory having an inner peripheral surface in the upper portion of a molten steel ladle is provided. A fixed part for fixing is detachably installed, and an elevator drive device is installed on this fixed part to allow dismantling of indefinite refractory materials.The cutter and breaker roll dismantling tool can be lifted up and down in the elevator part of the elevator drive device. In addition, the cutter and breaker roll dismantling tool is formed so as to elastically press and urge the inner peripheral surface of the molten steel ladle through a pressure adjusting device, and the lower part of the elevating and lowering device. A scraper is installed in the molten steel, and the scraps and scraps of the irregular-shaped refractory when dismantled with the dismantling tool are formed so that the scraper can discharge the scraps from the tap hole provided at the bottom of the ladle. Providing a dismantling device for pot-shaped irregular refractories To serve.

Effect According to the present invention, the cutter or the breaker roll dismantling tool is moved up and down along the inner peripheral surface of the molten steel ladle through the elevating drive device, or is swung to drive the irregular fire resistance of the inner peripheral surface of the molten steel ladle. The dismantling tool can be disassembled by mechanically cutting or cutting the dismantling tool into a desired pressing force to adjust the pressure pan. In addition, as described above, scraps of scraps and scraps that disassemble the amorphous refractory and fall down are scraped off with a scraper and automatically discharged from the tap hole at the bottom of the ladle to the outside. You can go. Therefore, for example, even if the molten steel ladle is in a high heat state, the demolition work can be efficiently performed, and the demolition of the molten steel ladle can be performed in 4 to 6 hours.

Examples Hereinafter, the present invention will be described based on Examples.

1 and 2 show one embodiment of the present invention. As shown in FIG. 1, the dismantling device 1 can be detachably fixed to the upper portion of the molten steel ladle 2 via a disc-shaped fixing portion 3 which also serves as a lid for covering the upper surface of the molten steel ladle 2 and which is not shown. Is formed. In the central portion of the fixed portion 3 which also serves as a lid, as shown in the figure, a rotative drive device 8 in which a worm shaft 5 of a drive motor 4 and a worm gear 7 having an opening with a spline groove 6 at the center is engaged is disposed. There is. In the spline groove 6 of the worm gear 7, an elevating part 10 which is a long elevating drive shaft having a spline 9 projecting on the peripheral part is fitted to be rotatable and rotatably driven. By attaching a protruding mounting member 12 of a lifting / lowering drive device 11 for a hydraulic cylinder which can be reciprocally driven by a stroke, the lifting / lowering part 10 is vertically movable from the bottom part to the upper part of the molten steel ladle 2 as shown in the drawing. Then, an inverted T-shaped holder 13 having sufficient rigidity as shown in FIGS. 1 and 2 is horizontally fixed to the lower end of the elevating part 10, and the dismantling tools 14 are provided at both ends of the holder 13. A disk-shaped cutter 15 and a breaker roll 16 such as a drum cutter are pivotally attached to each other so that they can be bent and adjusted, and a cutter 15, a breaker roll is provided by a pressure adjusting device 17, 18 such as a hydraulic cylinder having a pressure adjusting valve. Each of the 16 is pressed against the irregular refractory 19 with a constant pressing force on the peripheral surface. Further, the cutter 15 and the breaker roll 16 are provided with cutting guides 20 and 21 which come into contact with the irregular-shaped refractory material 19 in an adjustable manner so that the cutting amount can be made constant. As shown in FIG. 3, the irregular refractory 19 of the molten steel ladle 2 can be disassembled by slicing 90 degrees so that it can be fitted and fixed. A scraper 22 is detachably attached to the lower part of the holder 13, and cutting scraps and demolition scraps cut by a cutter 15 and a breaker roll 16 are provided at the bottom of the molten steel ladle 2. Mouth 23
It can be discharged from the outside. A dust collector 24 is arranged on the upper surface of the fixed portion 3 so that dust generated in the molten steel ladle 2 can be suctioned to clean the cutting surface. Reference numeral 25 is a hydraulic device for controlling the hydraulic pressure supply to the lifting drive device 11, the pressure adjusting devices 17, 18 and the like, and 26 is a hanging tool.

Then, when disassembling the molten steel ladle 2, the fixed portion 3 provided with the set of the disassembling tools 14 such as the cutter 15 and the breaker roll 16 described above is suspended by a crane or the like, and the molten steel is melted as shown in FIG. Firmly adhere to the top of the pan 2. Then, by making a predetermined wiring connection, the cutter 15 and the breaker roll 16 are rotated, the drive motor 4 is driven, and the elevator shaft 10 ascending / descending portion 10 is rotated via the worm shaft 5 and the worm gear 7, 15. The breaker roll 16 is swung along the inner peripheral surface of the molten steel ladle 2. Also, a lifting device for hydraulic cylinders.
11 is operated to raise and lower the elevating part 10 at a predetermined speed, and the cutter 15 and the breaker roll 16 which are swung up and down are raised and lowered along the inner peripheral surface, while the surface of the irregular-shaped refractory material 19 is spirally cut by the cutter 15, The surface is cut with the breaker roll 16. When cutting or cutting the irregular-shaped refractory 19, the cutting amount and cutting amount can be adjusted with the cutting guides 20 and 21 that are in contact with the peripheral surface, so the desired amount of cutting and cutting can be performed, leaving the old material as the surface. The sintered layer can be disassembled by precisely scraping it.

Further, in cutting the cutter 15 and the breaker roll 16, since the pressing force to the peripheral surface can be automatically adjusted by the pressure adjusting devices 17 and 18, the inner peripheral surface of the molten steel ladle 2 is inclined. However, the irregular shaped refractory 19 can always be cut with a constant abutting force and can be disassembled uniformly.

Also, if necessary, attach the cutter 15 tilted 90 degrees,
As shown in FIG. 3, the amorphous refractory 19 can be cut vertically, or can be freely disassembled by cutting it vertically and horizontally in a lattice pattern.

In this way, the scraps and scraps that are dismantled and fall downward are scraped off by the scraper 22, and
It is discharged from 23 to the outside. Also, molten steel pot 2
The dust generated therein is sucked by the dust collecting device 24 on the upper side to be collected.

Other Embodiments FIG. 4 shows another embodiment of the present invention. In this embodiment,
The fixing portion 3 which also serves as a lid is made slightly taller, and a lifting drive device 11 is hung at the center of the molten steel ladle 2 for disassembly processing. The lifting drive device 11 is formed by pivotally supporting both upper and lower ends as shown in the figure and pivotable around a revolving bearing 27 mounted on the fixed portion 3. Then, a disassembly tool 14 for the cutter 15 and the breaker roll 16 is attached to the elevating part 10 suspended in parallel with a pair of circular rods having sufficient rigidity.
Is slidably attached, and the root of the disassembling tool 14 is screwed to the elevating drive screw 31 which is rotatably driven by the ascending / descending motor 30 via the predetermined principle gear 29 so that the disassembling tool 14 can be moved at a predetermined speed. In addition to being movable up and down by means of a rotary motor 32, the rotating motor 33 is adapted to feed electric power to the elevation unit 10 so that it can be rotated around the center of the ladle 2 at a predetermined speed. Reference numeral 34 is a disassembly tool position adjusting cylinder that also serves as a pressing adjustment, 35 is a tip cutter, and 36 is a cylinder for attaching and detaching a fixed portion. It should be noted that the elevating part 10, the elevating drive screw 31 and the like can be covered with an appropriate dustproof treatment device such as a bellows or a spiral cone.

In this embodiment, the disassembling tool can be moved up and down or swung to perform disassembly processing without pulling up the elevating part from the molten steel ladle and with the fixing part fixed to the molten steel pan.

In the above embodiments, the dismantling tool is driven separately in the lifting unit for lifting and lowering and rotation, but the lifting drive shaft is screwed into the worm gear, and in principle, a disengageable clutch is arranged in the gear. It is also possible to raise and lower and rotate at the same time, for example.

In addition, the cutter and breaker roll dismantling tool can be reciprocally moved by a limit switch and a timer to automatically dismantle unshaped refractories for a long time. The lifting speed and rotation speed of the part can be programmed to drive in multiple stages so that the cutting can be performed at low speed and coarsely at the beginning so that the dismantling process can be optimally performed, and finally at high speed and precision. .

Although the above dismantling device has been described for the molten steel ladle,
It can be similarly applied to other cylindrical molten metal containers.

Effects of the Invention As described above, in the present invention, the cutter and the breaker roll dismantling tool is driven up and down along the inner peripheral surface of the molten steel ladle, or the swivel drive is performed to form the amorphous refractory material as described above. The scraps and scraps that are dismantled and fall downward are scraped off by a scraper, and can be automatically discharged to the outside from the tap hole at the bottom of the ladle. Then, scrape off the scraps and dismantled scraps that disassemble the amorphous refractory and fall downward as described above, with a scraper,
It can be automatically discharged from the tap hole at the bottom of the ladle. Therefore, the dismantling tool is not disturbed by cutting scraps and dismantling scraps, and even if the molten steel ladle is in a high heat state or dust is generated, it is possible to efficiently perform the dismantling work without damaging the worker. It is an epoch-making effect that the pan can be disassembled in a short time of 4 to 6 hours.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention with a part omitted, FIG. 2 is a plan sectional view of a molten steel ladle section in the same as above, and FIG. A sectional view and FIG. 4 are side sectional views in which a part of the other embodiment is omitted. 1 ... Dismantling device, 2 ... Steel ladle, 3 ... Fixed part, 10 ...
Elevating part, 11 …… Elevating part device, 14 …… Dismantling tool, 15 …… Cutter, 16 …… Breaker roll, 17, 18 …… Pressure adjusting device, 19 …… Unshaped refractory, 22 …… Scraper, twenty three…
… Steel tap, 24… Dust collector.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Nakamura 4 2479 Kikuma, Ichihara City, Chiba Prefecture (72) Inventor Takashi Arakawa 2-9-1, Shimadahonmachi, Okayama City, Okayama Prefecture (56) References 61-114083 (JP, A)

Claims (4)

[Claims] 1. A fixed part for fixing a dismantling device for disassembling an indefinite refractory on an inner peripheral surface is detachably provided on an upper portion of a molten steel ladle, and an ascending / descending drive device is disposed on the fixed part to provide an indefinite shape. Disposable refractory can be installed in the lifting part of the lifting drive device so that the cutter and breaker roll dismantling tool can be lifted and swung freely, and the cutter and breaker roll dismantling tool can be melted through the pressure adjusting device. It is formed so as to elastically press the inner peripheral surface of the pot, and a scraper is arranged at the bottom of the above-mentioned lifting drive device to remove the cutting scraps and scraps of the amorphous refractory when disassembling with the dismantling tool. A device for disassembling an indefinite refractory of a molten steel ladle, characterized in that it is formed so that it can be discharged freely with a scraper from the tapping port provided at the bottom of the ladle. 2. The dismantling device has a fixed part which also serves as a cover for covering the upper surface of the molten steel ladle, and the elevating part of the ascending / descending device is arranged on the fixed part so as to be vertically movable and swivel-driving. Disassembling device for indefinite refractory ladle according to claim 1. 3. The apparatus for disassembling an indefinite refractory in a molten steel ladle according to claim 1 or 2, wherein the cutter of the disassembling tool is formed so as to be tiltable by 90 degrees. 4. A disassembling device for a molten steel ladle indefinite refractory according to any one of claims 1 to 3, wherein a dust collecting device is provided in the fixed portion.