JPH0370990A - Disintegrating device for refractory lining - Google Patents

Abstract

PURPOSE:To improve the sureness of disintegrating work as well as a disintegrating efficiency by a method wherein an elevatable post, capable of running, traversing and rotating, is faced to the disintegrating area of a refractory lining through the opening of a molten metal vessel, objective of repairing, while a high-pressure water injecting nozzle and a copying means are provided at the tip end of the post. CONSTITUTION:A moving trestle 11 is provided so as to ride over the opening of a molten metal vessel or a tapping trough 1, a moving frame 12 is mounted thereon movably, a running saddle 14 and a traversing base 15 are provided on the frame 12 and an elevatable post 13 is provided so as to penetrate through the traversing base 15. The following unit 30 at the free end of the elevatable post 13 can be positioned freely with respect to the object of disintegration or a lining refractory 3 whereby a highpressure water injecting nozzle 32 is kept at a position with a predetermined interval from a disintegrating surface by a roller 31 contacted with the surface of the refractory lining 3 at all times. Water is supplied from a high-pressure water generating device 40 to the high-pressure water injecting nozzle 32 through a high- pressure water discharging pipe 35 and a water passage in the elevatable post 13. Respective driving machines are controlled by a control unit 41 and are operated safely through a remote control panel 42.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for dismantling refractory linings applied to molten metal containers used in the steel industry, non-ferrous metal metallurgy industry, etc. This relates to a device that peels and disassembles the required thickness.

[Conventional technology]

Examples of molten metal containers lined with refractories include tap runners, pig iron mixers, converters, ladles, and tundies in the steel industry, which are used to directly handle high-temperature molten metal,
Because it comes into contact with molten steel, it requires repair in a relatively short period of time.
This is repeated. Most refractories are made up of two layers: a permanent or structural lining (permanent lining) and an inner lining (work lining). Usually, only the inner lining (work lining) is peeled off and a new refractory lining is installed in this area. Repairs are being carried out.

In this dismantling work, for example,
As disclosed in Japanese Patent No. 9, there is a method of dismantling refractory linings by injecting a static crushing agent into the refractory lining. Further, Japanese Utility Model Application Publication No. 58-79314 proposes disassembling a refractory lining by reciprocating a hammer that drives a piston with compressed air.

[RH to be Solved by the Invention] However, in the above-mentioned prior art, the speed of disassembly and repair is slow, the running cost is high, and furthermore, when the molten metal container is used continuously, a large number of spare parts are required. Furthermore, mechanical demolition methods require more repair materials than necessary because it is impossible to remove only the necessary areas of the surface layer. In addition, there was a lot of noise and vibration, and a lot of dust was generated, making the working environment poor.

[Means to solve the problem]

The present invention solves the above problems and makes it possible to efficiently dismantle a lining that requires repair over a required layer thickness regardless of its surface condition.

In the present invention, an elevating post that can travel, traverse, and rotate faces the area where the refractory lining is to be dismantled from the opening of the molten metal container to be repaired, and a high-pressure water jet for dismantling the refractory lining is attached to the tip of the elevating post that can travel, traverse, and rotate. Profiling means are provided for placing the nozzle and the spray nozzle in the appropriate position relative to the demolition lining surface.

Therefore, the present invention provides a refractory lining dismantling device that peels off and dismantles required parts using a cutting force generated by a jet of high-pressure water, and includes a movable frame that is installed astride the opening of a molten metal container; , an elevating post installed on this frame that is capable of traveling, traversing, raising and lowering, and rotating; and a tracing means attached to the free end of this elevating post and in contact with the target surface; a following part that advances and retreats following the unevenness of the surface to be targeted; a high-pressure water jet nozzle provided in the following part that directs toward the target surface; and a drive for the frame, the elevating post, the following part, and the high-pressure water jet nozzle. or control means. As the tracing means, it is preferable to use so-called tandem tracing rollers that are arranged in tandem in the moving direction, and the jet orifice of the high-pressure water jet nozzle is placed facing back from the tracing line of the tracing roller, and the distance behind this is set as follows. For example, it is adjusted according to the material of the refractory lining and the pressure of high-pressure water.

Note that the demolition depth is adjusted by changing the moving speed of the high-pressure water injection nozzle.

[Action of the invention]

Through various types of molten metal containers, the surface conditions of the inner refractory lining, which is subject to wear and tear due to the influence of molten metal, vary greatly, such as unevenness. It is not necessary to uniformly dismantle and peel off the structural refractories until a certain thickness is reached.

According to the findings of the present inventors, the defective layer, which has changed in quality with unevenness due to wear, consists of a slag adhesion layer and an embrittlement layer formed in contact with it, which is a layer with a total thickness of about 10 to 3 degrees. This is the thickest part. Therefore, as long as only this poor quality layer is dismantled and removed to expose the unchanged layer of the inner refractory lining that maintains its original condition, subsequent repair work can be completed by simply laminating a layer on top of it. be.

In line with this purpose, the device of the present invention allows the profiling device to run on its own while constantly pressing the profiling tip against the surface to be dismantled, thereby maintaining the distance between the tip of the high-pressure water jet nozzle and the surface to be dismantled at a predetermined value. By spraying pressurized water and drilling, it is possible to smoothly dismantle to the required depth.

〔Example〕

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings.

Figure 1 shows the case where the device of the present invention is applied to a tap runner 1. In Figure 0, 2 is a structural refractory (permanent lining) that is in contact with the steel shell, etc., and 3 is a surface that is exposed by the molten metal flow. The inner refractory lining is worn and uneven.

The refractory lining immediately before the demolition work begins has unevenness along the entire length of the tap trough 1, and the entire surface of the refractory lining is to be dismantled to a specified thickness, and the work in this example was performed in the cold. .

A moving pedestal 11 is provided so as to straddle the opening of a tap trough 1, which is a molten metal container, and a moving frame 12 is movably mounted on the moving pedestal 11. A traveling saddle 14 is provided on the movable frame 12, a traversing base 15 is provided on the traveling saddle 14, and an elevating boss 13 is provided through the traversing base 15.

These moving frame 12, traveling saddle 14, traversing base 15, and lifting post 13 are each provided with a moving drive machine (in this embodiment, an electric motor is used like the others) 16,
Traveling drive machine 17, traversing drive machine 18, lifting drive machine 2
Move by 0. Therefore, the movable frame 12 that moves over a wide area on the movable frame 11 and the movable frame 1
If the moving direction of the traveling saddle plane 4, which moves slightly within the range limited to 3 performs movement in the X-axis direction. The lifting post 13 is rotated by the rotation drive machine 19, and as a result, the following part 3 provided at the free end of the lifting post 13
o can be freely positioned throughout with respect to the inner refractory lining 3 to be dismantled.

The tracing section 30 is provided with a tracing roller 31 and a high-pressure water jet nozzle 32, which are tracing means always in contact with the surface of the worn inner refractory lining 3, and are spaced a predetermined distance from the tracing line of the tracing roller 31. The tip of the high-pressure water injection nozzle 32 is arranged as follows. The following part 30 has a structure including a deflection cylinder 36 and a control cylinder 33, and is always pressed with a constant pressure in the direction of the dismantling surface by the action force of the control cylinder 33, so that it smoothly follows the uneven surface, and uses high-pressure water. Injection nozzle 32
The injection port is maintained at a predetermined distance from the demolition surface. Further, due to the action of the deflection cylinder 36, the profiling roller 3
1 and the line of action of the high-pressure water injection nozzle 320 can be deflected from a right angle to the axis of the lifting boss 13 over a range of 0 degrees, so the dismantling work also extends to the bottom of the tapped iron ml in this embodiment. be.

Water is supplied to the high-pressure water injection nozzle 32 from the high-pressure water generator 40 via the swivel joint 34, the high-pressure water pipe 35, and the water channel in the lifting post 13.

Further, each of the aforementioned driving machines is controlled by a control unit 41, and the control unit 41 and the high pressure water generator 40 are safely operated by a remote control panel 42.

The refractory lining dismantling apparatus of the present invention configured as described above is capable of moving the traveling saddle 14 and the traversing base 15 at a speed of 0.5 to 5 m/s so as to be easily adaptable to various types of dismantling work.
It is preferable that the distance between the profiling surface of the profiling roller 31, that is, the dismantling surface, and the injection port of the high-pressure water injection nozzle 32 is 1500 to 300 in.
10 to 100+ in high pressure water injection of 0 kg/j
+m range, and nozzle movement speed from 0.5 to
By adjusting to 5m/win, the above-mentioned 10 to 3
A drilling and disassembly thickness of 0 awa was obtained.

In addition, even when the lining refractory is hot at around 500℃,
The dismantling work was completed without any problems simply by applying appropriate heat-resistant measures to each part.

[Effects] According to the apparatus of the present invention, the refractory lining of a molten metal container can be dismantled regardless of whether it is cold or hot, with the following effects.

(a) By bringing the profiling roller into contact with the demolition surface and self-propelled and guided, high pressure The distance between the tip of the pressure water injection nozzle and the demolition surface is kept constant, ensuring reliable demolition work.

By having the tracing roller come into contact with the demolition surface, self-propelled, and guided, the demolition efficiency can be improved while easily dealing with a wide variety of worn lining surfaces.

In addition, the device for automatic driving is simple, inexpensive, and easy to handle, and has great industrial applicability.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a specific embodiment of the device of the present invention. 1-... Tapping m 2... Structural refractories 3--
Inner refractory lining 11--Moving frame 12--Moving frame 13
・−・Elevating post 14～・−・Travel saddle 15
- Traverse base 3o - Follower section 31 - Tracing roller 32 - High pressure water injection 33 - Control cylinder 36 - Deflection cylinder nozzle

Claims (1)

[Scope of Claims] 1. A refractory lining dismantling device that peels off and dismantles required parts using a drilling force generated by a jet of high-pressure water, comprising: a movable frame provided astride an opening of a molten metal container; and an elevating post provided on this frame that is capable of traveling, traversing, raising and lowering, and rotating, and a tracing means attached to the free end of this elevating post and in contact with the target surface, so that the elevating post has a tracing effect. a following part that advances and retreats following the unevenness of the target surface; a high-pressure water jet nozzle provided in the following part that directs toward the target surface; A refractory lining dismantling device comprising: a drive or control means;