KR100594823B1 - Plug for main iron runner of blast furnace - Google Patents

Abstract

The present invention discloses a plug for a molten metal remnant ball of a smelting furnace that can open and close the remnant ball quickly and safely at any time in a short time when necessary, excluding the difficulty of work for opening the remnant ball.

The main configuration of the present invention, the plug body of the refractory material having an appearance in accordance with the shape of the remnant ball so as to be inserted and withdrawn to the remnant ball of the large hot water island; A part is planted and fixed in the plug body and the other part includes a rod exposed to the rear end of the plug body to receive an external force for inserting and withdrawing the plug body with respect to the remnant ball.

Large hot water, molten iron, residual ball, plug, rod, reinforcement rib, nipple

Description

PLUG FOR MAIN IRON RUNNER OF BLAST FURNACE}             

1: A cross-sectional view showing a large water bath temporarily stored in the molten iron discharged from the furnace

2 is a cross-sectional view showing a plug according to a first embodiment of the present invention.

3 is a cross-sectional view showing a plug according to a second embodiment of the present invention.

4 is a cross-sectional view showing a plug according to a third embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: large bath 11: mold

12: standard refractory 13: amorphous refractory

14: molten iron 15: slag

16, 20, 30, 40: plug 16a, 21, 31, 41: plug body

16b, 22, 32, 42: rod 22a, 32a: reinforcement rib

22b, 32b, 42b: Hole 33,43: Sealing material leakage preventing plate

34,44: Nipple 45: Steel Plate

The present invention relates to a plug for a large-scale remnant ball of a furnace, and more particularly, to open and close a remnant ball provided for discharging a mixed melt of molten iron and slag in a large-scale waterway in which molten metal discharged from the furnace is temporarily retained or stored. It relates to a plug used in.

In the general steelmaking process, the melt produced in the furnace is discharged to the main iron runner through the outlet, and the melted melt is discharged into the molten iron and slag due to the specific gravity difference in the state of staying or storing for a predetermined time in the large melt. Are separated. Then, the separated molten iron flows into the molten iron melt, and the slag is discharged along the slag melt after the molten iron is re-separated from the large melt.

On the other hand, the outside of the large bath is made of an iron mold, the inner form of the refractories are built, and the amorphous refractory is molded by the high temperature molten iron can remain. In the state where molten iron is retained or stored in such a hot spring, the refractory causes chemical reactions and physical changes due to the flow of the molten iron at a high temperature around 1500 ° C. and damage and wear progress. At this time, in order to repair the inner wall of the worn or damaged large waterway, it is necessary to discharge the molten iron in the large waterway to the outside once. By the way, the current molten iron discharging work carried out by opening the remnant ball by hitting and excavating the large hot water using a remnant ball opening machine operated by hydraulic pressure or pneumatic pressure, and discharges the molten iron in the large tap water through this remnant hole. Is done in a way. However, since the opening work using the remnant hole opening machine is not easy, the remnant discharge work is performed through oxygen injection to a large part. In such a conventional operation method, the molten iron discharging work in the water supply is generally repeated about 8 to 10 times once every 2 to 3 days until the life of the large water supply reaches the end of the next repair.

However, the following problem occurs in the conventional working method as described above. First, there is a problem that installation and removal work of the remnant opening is very cumbersome. Secondly, the cracks in the refractory around the remnant sphere are cracked by the impact applied to the large bath at the opening of the remnant ball, and ultimately, the life of the large tap water is shortened. Third, in the case of the opening operation by oxygen, there is a risk that an operator may be burned by the spark that is scattered, and there is a possibility that a large accident such as explosion or fire due to oxygen, a flammable gas, may be caused. In addition, there is a problem that the pollutant is generated.

On the other hand, there is an example that the molten iron is leaked due to abnormal wear of the large hot water during operation, the leakage of the molten iron is likely to lead to large accidents, such as damage to life as well as equipment. And, once the molten iron leakage accident occurs, how quickly to discharge the molten iron in the large hot water supply depends on minimizing the molten iron leakage and preventing large accidents. However, in the current working method using the remnant hole opening machine, since excessive time is required for preparation of work and opening of the remnant hole, such as installation of a machine, it is almost impossible to reduce the amount of molten iron that leaks. Therefore, there is an urgent need for the improvement of working methods for the prevention of safety accidents and the protection of facilities.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to provide a furnace that can open and close the receptacle opening quickly and safely at any time in a short time if necessary, excluding the difficulty of opening the remnant opening. The main object is to provide a plug for the remnant ball.

Another object of the present invention is to provide a plug for a molten iron residue ball of a smelting furnace which can eliminate the refractory breakage around the residual steel ball caused by the opening of the remnant ball in the related art and the shortening of the lifespan of the molten metal.

Still another object of the present invention is to provide a plug for a molten iron residue ball of a blast furnace that is effective in securing safety and protecting equipment while reducing the time for emergency measures in the event of an emergency such as a molten iron leakage accident.

Plugs for large tap water remnant ball of the furnace according to the present invention for achieving the above object, the plug body of the refractory material having an appearance in accordance with the shape of the remnant ball to be inserted and withdrawn to the remnant ball of the tap water; A part is planted and fixed in the plug body, and the other part includes a rod exposed to the rear end of the plug body and subjected to an external force for inserting and withdrawing the plug body with respect to the remnant ball, and at the rear end of the plug body, Sealing material leakage preventing plate for blocking the inlet of the remnant sphere is provided to prevent the leakage of the sealing material pressed into the gap between the plug body and the remnant sphere.
The plug for the molten iron residue ball of the furnace according to the present invention is characterized in that the sealing material leak prevention plate is provided with a nipple capable of connecting a hose for press-fitting the sealing material into a gap between the plug body and the residual ball.
The plug for the large hot water remnant ball of the furnace according to the present invention includes a plurality of reinforcing ribs provided at the site of the rod main body in order to increase the cohesion force and the breakage strength of the plug main body. The steel plate for reinforcement is enclosed, and a hole for pulling out the plug is formed at the rear end of the rod.

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Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a cross-sectional view showing a large hot water temporarily stored in the molten iron discharged from the furnace. As shown in the figure, the outside of the large bath 10 is made of an iron mold 11, inside which a fixed refractory 12 is built, and an innermost irregular refractory 13 is molded. The molten iron 14 and the slag 15 discharged from the blast furnace stays inside the large bath 10, and the lower portion of the lower floor for discharging the molten iron 14 to apply the plug 16 of the present invention. (17) is provided. And, in order to prevent the molten iron from leaking through the gap between the plug 16 of the present invention inserted into the remnant port 17 and the remnant port 17, and to facilitate the extraction of the plug 16, the plug ( The sealing material 18 is press-fitted between the 16 and the residual bulb 17. On the other hand, the plug 16 of the present invention is composed of a plug body 16a and a rod 16b for inserting or withdrawing the plug body 16a into the remnant hole 17. Explain through examples.

2 is a cross-sectional view showing a plug according to a first embodiment of the present invention.

The plug body 21 of the illustrated plug 20 has an external shape in the form of a remnant ball so as to be arbitrarily inserted into or withdrawn from the remnant ball of a large bath, for example, as shown in FIG. It may be made of. In particular, since the plug body 21 is in contact with the hot molten iron in the state of being inserted into the remnant port of the large hot water, the material should be made of a refractory having excellent heat resistance and hot strength and cold strength.

And, when the rod 22 inserted into the plug body 21 is molded in a part of the plug body 21 when the plug body 21 is molded, the remaining part of the rod 22 is the plug body 21. The long exposure to the rear end of the c) serves as an action site for the force for inserting the plug body 21 into the residing sphere or withdrawing from the residing sphere. In particular, a plurality of reinforcing ribs 22a are provided at a corresponding portion of the rod 22, which is planted in the plug body 21, and this reinforcing rib 22a serves to increase the cohesion force and the breaking strength of the plug body 21. Do it. The rear end of the rod 22 is formed with a hole (22b) for the extraction of the plug 20, the connection pin provided in a predetermined plug insertion / withdrawal device (for example, oil-pneumatic device) the hole ( 22b), the plug 20 is pulled out from the remaining wire.

3 shows a plug according to a second embodiment of the present invention.

The plug 30 of the second embodiment is provided with a sealing material leakage preventing plate 33 at the rear end of the plug body 31 in addition to the configuration disclosed in the plug 20 of the first embodiment. This sealing material leak prevention plate 33 is a sealing material (18 of FIG. 1) in the clearance gap between the plug main body 31 and the afterglow hole 17 in the state in which the plug main body 31 was inserted in the remaining wire (17 of FIG. 1). ) Serves to block the inlet of the remnant port 17 so that the sealing material 18 can be prevented from leaking out of the remnant port 17 when the) is press-fitted.

In addition, in order to press-fit the sealing material 18 to the clearance gap between the plug main body 31 and the residual ball | hole 17 as mentioned above in the state in which the plug main body 31 was fitted to the residual ball | hole 17, it is predetermined rather than by hand. It is preferable to use a press-fit device in terms of press-fit strength and sealing effect. In order to be able to press-fit the sealing material 18 using such a press-fit device, in this embodiment, a nipple 34 is provided on the sealing material leakage preventing plate 33. Accordingly, the nipple 34 may be connected to the press-fitting device with a high-pressure hose, and the sealing material 18 may be press-fitted into the gap between the plug body 31 and the residual wire 17.

Other configurations, that is, a structure in which a part of the rod 32 planted in the plug body 31 is provided with a reinforcing rib 32a, and a hole 32b for drawing out the plug 30 at the rear end of the rod 32 This formed configuration is the same as that of the first embodiment described above.

4 shows a plug according to a third embodiment of the present invention.

The plug 40 of this embodiment is characterized by a structure in which a steel plate 45 for reinforcing the strength of the plug body 41 is surrounded on the outer circumferential surface of the plug body 41. The steel plate 45 is not simply overlaid on the outer circumferential surface of the plug body 41, but inside the steel plate 45 in a state where the steel plate 45 is made along the outline of the plug body 41. It is preferable that the plug body 41 is formed by injecting the refractory material. Since the steel plate 45 is reinforced on the outer circumferential surface of the plug main body 41 as described above, damage to the plug main body 41 due to the insertion or withdrawal of the plug 40 into the remnant hole (17 in FIG. 1) can be prevented. In addition, it is very advantageous when high strength is required when inserting the plug 40 into the remnant hole 17.

On the other hand, in this embodiment, a part of the rod 42 planted in the plug body 41 may be provided with the reinforcing rib as in the above-described embodiment, but the strength of the plug body 41 is increased by the steel plate 45. It can be kept sufficiently so that the removal of the reinforcing ribs is possible.

In addition, the rear end of the rod 42 is formed with a hole 42b for pulling out the plug 40, and the sealing material leakage preventing plate 43 and the nipple 44 are provided at the rear end of the plug body 41. The configuration is the same as in the above-described first and second embodiments.

In order to apply the plug of the present invention made as described above, as shown in FIG. 1, the remnant ball 17 should be provided in the large bath 10. In addition, a plug insertion / extraction device for inserting or withdrawing the plug 16 into the remnant port 17 is required, and examples thereof include a hydraulic / pneumatic device. In addition, it is also necessary to provide a press-fitting device for press-fitting the sealing material 18 into the gap between the remnant ball 17 and the plug main body 16a in a state where the plug 16 is inserted into the remnant ball 17.

On the other hand, the plug 16 is pushed into the remnant port 17 of the large bath 10 using the plug insertion / extraction device, and the sealing material 18 is inserted into the gap between the remnant port 17 and the plug main body 16a. ), The operation of the large bath 10 is advanced. When the molten iron 10 needs to be withdrawn during operation, that is, the molten iron 14 leaks due to repair of the refractory materials 12 and 13 of the large water supply 10 or abnormal wear of the refractory materials 12 and 13. When the situation occurs, the plug 16 only needs to be pulled out from the remnant port 17, which is very advantageous in terms of speed and safety of work compared to the remnant opening method or oxygen working method by the conventional blow excavation work. .

The plug for the molten iron residue ball of the furnace according to the present invention as described above has the following effects.                     

First, since the remnant ball can be opened and closed at any time in the state where the remnant ball is installed at the time of constructing the large bath, any separate work for opening the remnant ball as in the prior art is unnecessary when it is desired to discharge the molten iron from the large bath. The speed and safety of opening and closing operations are greatly improved.

Second, in the event of an emergency such as a charter leakage accident, the charter can be quickly discharged through the immediate withdrawal of the plug, minimizing the leakage of the charter and preventing secondary accidents in advance. effective.

Third, since there is no risk of refractory breakage around the remnant ball, which was caused at the time of opening of the remnant ball, it contributes to the life preservation and cost reduction of the large hot water.

Fourth, in the conventional oxygen working method, dust and spark scattering phenomenon generated during the opening of the remnant opening are excluded and there is no generation of pollutants, which is very advantageous in terms of the environment.

Claims (6)

A plug body of a refractory material having an appearance in the form of the remnant sphere so as to be inserted into and withdrawn from the remnant sphere of the large bath; A part is planted and fixed in the plug body, and the other part is exposed to the rear end of the plug body and includes a rod for receiving an external force for inserting and withdrawing the plug body with respect to the remnant ball. In The rear end of the plug main body is provided with a sealing material leakage preventing plate for blocking the inlet of the remnant port so as to prevent the leakage of the sealing material pressed into the gap between the plug main body and the remnant hole. Plug for remnant ball. The method of claim 1, The sealing material leakage preventing plate, the plug for the large-scale remnant ball in the furnace, characterized in that the nipple which can connect a hose for press-fitting the sealing material into the gap between the plug body and the residual ball. The method according to claim 1 or 2, The portion planted in the plug body of the rod is provided with a plurality of reinforcing ribs for increasing the cohesive force and breaking strength of the plug body, The outer circumferential surface of the plug body is surrounded by a steel plate for reinforcing the strength of the plug body, Plug for the large-scale remnant ball of the furnace, characterized in that a hole for pulling out the plug is formed at the rear end of the rod. delete delete delete

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