JPH105984A - Dust collecting device for demolishing and repairing ladle refractory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently collect powdery dust developed at the time of demolishing and repairing a ladle refractory. SOLUTION: At the time of shifting a dust collecting house 6 from a waiting position to a dust collecting position, a bellows house 5 freely expandable/ shrinkable is shifted by following to the above shifting while taking the connecting point with a fixed house 3 as the starting point and one side of opening hole part 13 in the dust collecting house 6 covers the outer peripheral surface of the ladle 2 laid on a ladle frame base 1 from the outside. The powdery dust developed at the time of demolishing the ladle refractory is efficiently collected through a duct 7 for collecting the dust and a sub-duct 11 for collecting the dust connected with the upper surface part and the side surface part of the dust collecting house 6, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing or repairing a new refractory with a slag dressing device for removing old refractories lined in a ladle for receiving molten metal from a converter or the like. In addition, the present invention relates to a dust collection device for disassembling and repairing a ladle refractory which collects generated dust.

[0002]

2. Description of the Related Art Generally, when a molten metal is taken out of a refining furnace such as a converter, the molten metal is once received in a ladle and used for each use. Such a ladle is made by refractory material such as refractory bricks or heat-resistant mortar lining the inside of an iron container. And slag adhere and contaminate. Therefore, it is necessary to repair the ladle by breaking and removing the bad portion of the refractory lining and embedding a new refractory, or dismantling repair by destroying and replacing the whole.

[0003] The work of removing the refractory lining has been carried out by a worker entering a ladle using tools such as a pick breaker and a hammer drill. However, this is labor intensive and requires only a small amount of labor. However, there is a drawback in that the refractory is exposed to danger and the refractory cannot be demolished until the temperature of the refractory drops, resulting in time loss. As a means for solving these problems, it is usual to use a slag dressing device disclosed in, for example, Japanese Utility Model Publication No. 4-35004, and perform the work of removing the refractory only by the operator.

[0004] However, the work of breaking the ladle refractory by the slag dressing apparatus has a drawback that a large amount of dust is scattered, which significantly deteriorates not only the work environment of the operator but also the environment around the work place. As a dust collector,
The dust collection duct was demolished and installed near the workplace and near the ladle, and the dust generated by this dust collection duct was collected. However, a large amount of dust generated from a huge ladle with an inner diameter exceeding 4 m can not be collected with high efficiency simply by collecting it locally using a nearby dust collection duct. Environmental pollution around the demolition work area was forced.

[0005]

Dust collection using a dust collection duct or the like, which is a conventional local dust collection method, is effective when a ladle refractory is locally ground in a very small range. However, a sufficient dust-collecting effect cannot be obtained in operations in which a large amount of powder or refractory dust is scattered in a very short time, such as when dismantling a ladle refractory. As a countermeasure, it is conceivable to adopt a house system in which the upper and side surfaces of the refractory dismantling workplace are surrounded by a vinyl sheet or the like to suppress scattering of dust.

However, since the ladle for dismantling the refractory must be handled using an overhead crane or the like, the upper part of the ladle cannot be surrounded by a dust collection house. Can not be made so close to each other, so that an improvement in dust collection efficiency and an effect of suppressing scattering of dust cannot be expected. The present invention provides a dust collecting apparatus for disassembling and repairing a refractory for a ladle, which develops the dust collecting house method and does not hinder the work such as the handling of the ladle and can obtain a high dust collecting efficiency. It is intended for.

[0007]

According to a first aspect of the present invention, there is provided a ladle support for supporting a ladle to be dismantled and repaired in an overturned state, and an outer periphery of an inlet of the ladle. One side has an opening that covers the surface from the outside, and the other opening is connected to the front end of a bellows house that is extendable and contracted, and the opening that is connected to the rear end of the bellows house is one side. And a dust collection duct having one end connected to the upper surface of the dust collection house and the other end connected to a main dust collection duct via a flexible duct on the way. Characterized by being reciprocally movable between a dust collecting position for covering the outer peripheral surface of the ladle entrance from the outside and a standby position for releasing the cover from the outside. It is.

According to a second aspect of the present invention, there is provided a dust collecting sub-duct for connecting a side portion of the dust collecting house to a suction portion of the dust collecting duct. Dust collector for dismantling and repairing pot refractories. According to a third aspect of the present invention, a collection wheel for dismantling and repairing a refractory for a ladle according to the first or second aspect, wherein a traveling wheel is provided below each of the bellows house and the dust collection house. It is a dust device.

According to a fourth aspect of the present invention, there is provided a dust collecting apparatus for disassembling and repairing a ladle refractory according to the third aspect, wherein a traveling wheel provided at a lower portion of the dust collecting house is driven to rotate. Device. The invention according to claim 5 is characterized in that a flexible sealing material for sealing a gap formed between the opening and the outer peripheral surface of the ladle entrance portion is attached to one opening of the dust collection house. Item 4. A dust collector for disassembling and repairing ladle refractories according to item 1, 2, 3, or 4.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in which a ladle refractory constructed by pouring a zircon-shaped irregular refractory is dismantled using a slag dressing apparatus. FIG. 1 is a side view showing a dust collecting apparatus for disassembling and repairing a ladle refractory according to the present invention, and FIG.
It is an arrow view.

As shown in FIGS. 1 and 2, two ladle stands 1 are arranged on the floor of a workplace for dismantling a ladle refractory, and a ladle 2 carried in by an overhead crane or the like is handled by handling. It is placed on the ladle stand 1 in a state of being laid sideways. A fixed house 3 is installed in the demolition workplace. The fixed house 3 is surrounded by three side walls and a ceiling wall built on the floor, and an opening 4 is provided on one side thereof. For example, a structure in which an iron frame is covered with thread-containing transparent vinyl is used. An entrance door 17 is provided on the side wall of the fixed house 3.

An opening 4 provided on one side of the fixed house 3 is connected to a rear end of a bellows house 5 which is freely expandable and contractible in the horizontal direction and whose front and rear ends are open. The tip is connected to the other opening provided at the rear end of the dust collection house 6. In addition, bellows house 5
For example, bellows using a canvas cloth is used as the material, and the dust collection house 6 has a structure using a steel plate.

The tip of the dust collecting house 6 is provided with one opening 13 for covering the outer peripheral surface of the inlet of the ladle 2 placed on the ladle stand 1 from the outside. Further, a dust collection duct 7 is connected to the upper surface of the dust collection house 6, and the dust collection duct 7 is connected to a dust collection main duct 10 via a flexible duct 12 provided on the way. ing. This dust collecting duct 7 has an air volume adjusting damper 8 at its entrance.
An opening / closing damper 9 is provided at the outlet. Further, it is preferable to connect the suction portion of the dust collection duct 7 and both side surfaces of the dust collection house 6 by using the dust collection subduct 11.
At the entrance of each dust collection sub duct 11, a flow rate adjusting damper 8 is provided.

On both lower sides of the bellows house 5 and the dust collection house 6, a plurality of tire-type running wheels 14 are provided.
The traveling wheels 14 move on a track 16 provided from the fixed house 3 toward the ladle 2. The traveling wheel 14 attached to the dust collection house 6 is driven to rotate by a traveling driving device (not shown) so that the dust collection house 6 moves forward and backward on the track 16, and the dust collection house 6 is moved to the ladle 2. Reciprocates horizontally between a dust collection position (position indicated by a solid line in FIG. 1) that covers the outer peripheral surface of the entrance portion from outside and a standby position (position indicated by a virtual line in FIG. 1) to release the dust collection position. At this time, the bellows house 5 expands and contracts following the movement of the dust collection house 6, and moves on the track 16 via the traveling wheels 14.

When loading and unloading the ladle 2 using an overhead crane or the like and handling it, the dust collection house 6 is moved to a standby position so as not to be in the way. A large number of sealing chains 15 are suspended from one opening 13 of the dust collection house 6 as a flexible sealing material for sealing a gap formed between the opening 13 and the outer peripheral surface of the ladle 2. Is preferred. A heat-resistant rubber plate can be used as the flexible sealing material. It is preferable to similarly seal the gaps generated in other places using a flexible sealing material such as a sealing chain or a sealing rubber plate.

Next, the operation of the present invention will be described. In the case of repairing the ladle 2 by breaking and removing the bad portion of the refractory lining and embedding a new refractory, or when rebuilding the entire refractory and performing refilling work, the dust collection house 6 is waiting at a standby position, Inside the bellows house 5, a slag dressing device for crushing the ladle refractory is provided at the opening 13 of the dust collection house 6.
It is taken from. Ladle 2 by operating an overhead crane
Is carried into the dismantling work place, the ladle 2 is handled, and the ladle 2 is placed on the ladle stand 1 in a state of being turned sideways.

Next, driving wheels 14 provided on both lower sides of the dust collecting house 6 are driven by an electric motor or the like, and the dust collecting house 6 is opened by one opening 13 of the ladle 2.
To the dust collection position that covers the outer peripheral surface of the inlet from the outside. At this time, a gap formed between the opening 13 of the dust collection house 6 and the outer peripheral surface of the inlet of the ladle 2 is sealed by a number of sealing chains 15 suspended from one opening 13 of the dust collection house 6. .

At the same time, the bellows house 5 follows the advance of the dust collecting house 6 and extends from the connection with the fixed house 3 as a starting point and moves in the forward direction. At this time, the dust collection house 6 is allowed to move by the flexible duct 12 interposed in the dust collection duct 7 connected to the upper surface. The opening / closing damper 9 provided at the outlet of the dust collecting duct 7 is opened to prepare for dust collection, and the air volume provided at the inlet of the dust collecting duct 7 and the dust collecting sub-duct 11. The opening degree of the adjustment damper 8 is adjusted. Subsequently, the slag dressing device taken into the bellows house 5 is operated to start the dismantling work for breaking and removing the refractory of the ladle 2.

At this time, the dust generated in the dust collection house 6 is kept in a sealed state by the bellows house 5 and the fixed house 3, so that the dust collection duct 7 connected to the dust collection house 6 and the dust collection Efficiently sucked into the sub duct 11,
Dust collector (not shown) via main duct 10 for dust collection
Dust is collected. A large number of sealing chains 15 are suspended from one of the openings 13 of the dust collection house 6 to seal a gap formed between the ladle 2 and the outer peripheral surface of the ladle 2. Can be reduced.

After the work of dismantling the refractory of the ladle 2 by the slag dressing device is completed, the dust collection house 6 is moved from the dust collection position to the standby position by the operation reverse to the above-mentioned procedure, and is then put on the ceiling. The ladle 2 is carried out to a refractory plant using a crane or the like, and the zircon-type irregular-shaped refractory is poured thereinto for construction. In the above embodiment, the case of disassembling the ladle refractory constructed by pouring zircon-type amorphous refractory using a slag dressing apparatus is described. It is also applicable to the refractory dismantling of a ladle constructed using various refractories. In addition, a known apparatus such as an atlas shovel type can be used for the ladle refractory dismantling apparatus in addition to the slag dressing apparatus.

[0021]

According to the present invention, when the dust collection house is moved from the standby position to the dust collection position, the bellows house, which can expand and contract following the advance of the dust collection house, starts from the connection portion with the fixed house. It extends and moves in the forward direction. Thereby, the outer peripheral surface of the entrance portion of the ladle supported on the ladle stand in a laterally overturned state can be covered from the outside with the opening of the dust collection house.

The large amount of dust generated when the ladle refractory is dismantled does not leak to the outside by the dust collecting house, bellows house and fixed house, but is efficiently collected by the dust collecting duct connected to the dust collecting house. can do. As a result, dust is not scattered in the vicinity of the demolition workplace, so that the workplace for dismantling the ladle refractory can be freely selected in a convenient place, and the efficiency of the work of dismantling the ladle refractory can be improved. .

[Brief description of the drawings]

FIG. 1 is a side view showing a dust collector for disassembling and repairing a ladle refractory according to the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladle stand 2 Ladle 3 Fixed house 4 Opening 5 Bellows house 6 Dust collection house 7 Dust collection duct 8 Air volume adjustment damper 9 Opening / closing damper 10 Dust collection main duct 11 Dust collection subduct 12 Flexible duct 13 Opening Part 14 Running wheel 15 Sealing chain 16 Track 17 Door for entrance

Claims (5)

[Claims] 1. A ladle cradle for supporting a ladle to be dismantled and repaired in a laterally overturned state, and an opening for covering an outer peripheral surface of an inlet portion of the ladle from one side, and the other opening is telescopic. A dust collection house connected to the front end of the bellows house, a fixed house having an opening on one side connected to the rear end of the bellows house, and one end connected to the upper surface of the dust collection house, A dust collecting duct whose end is connected to the dust collecting main duct via a flexible duct on the way,
The disassembly and repair of a ladle refractory, wherein the dust collecting house is configured to be able to reciprocate between a dust collecting position for covering an outer peripheral surface of an inlet portion of a ladle from the outside and a standby position for releasing the cover. For dust collector. 2. The dismantling and repairing of ladle refractories according to claim 1, further comprising a dust collecting sub-duct connecting the side surface of the dust collecting house and a suction part of the dust collecting duct. Dust collector. 3. The dust collecting apparatus for disassembling and repairing a ladle refractory according to claim 1, wherein a traveling wheel is provided below each of the bellows house and the dust collecting house. 4. The dust collecting apparatus for disassembling and repairing a refractory in a ladle according to claim 3, wherein a traveling wheel provided at a lower portion of the dust collecting house is driven to rotate. 5. A flexible sealing material which seals a gap formed between one opening of the dust collecting house and an outer peripheral surface of an inlet portion of a ladle. ,
A dust collector for disassembling and repairing a ladle refractory according to claim 3 or 4.