KR100470067B1 - An apparatus for crushing the blocking brick using the insight of blow pipe in furnace - Google Patents

Abstract

The present invention relates to an apparatus for crushing a sealed refractory sealing a tuyere in which a blowpipe of a blast furnace is disposed.

The present invention forms a female threaded portion (11a) on the inner peripheral surface of the front end to be screwed with the male screw portion 131 formed at the end of the observation port 131, the valve for opening and closing the inner hole 12 through the center of the body (11) A hollow-cylindrical cylindrical connection portion 10 having a member 12 at the center of length and having an arm 40a of the quick joint 40 integrally mounted at a rear end thereof; The male part 40b assembled with the arm part 40a of the quick joint 40 is integrally mounted at the tip, and the sealing O-ring 23 is mounted on the inner circumferential surface of the inner hole 22 passing through the center of the body 21. And a predetermined length that is horizontally inserted into the hollow hollow cylindrical sealing part 20 and the inner hole 22 of the sealing part 20 and the inner hole 22 of the connecting part 10, which are assembled at the rear end of the connecting part 10. Equipped with a high-pressure water spray pipe 31 of the injection gun connected to the rear end of the high-pressure water spray pipe 31 and the connection pipe 33, the high-pressure water line 34 is supplied with high-pressure spray water And a high pressure water injection part 30 for crushing the sealed refractory 170 sealing the inside of the tuyere 120 as high pressure water.

According to the present invention, as the high-pressure water of the high-pressure water injection pipe is inserted horizontally through the observation port of the blast furnace blow pipe, the sealing refractory sealing the inner passage of the tuyere during the repair of the furnace wall completely crushing efficiency without the operator's work load Can increase.

Description

Sealed refractory shredding device using blast furnace blow pipe observation port {AN APPARATUS FOR CRUSHING THE BLOCKING BRICK USING THE INSIGHT OF BLOW PIPE IN FURNACE}

The present invention relates to a device for crushing the sealed refractory to seal the tuyere in which the blowpipe of the blast furnace is disposed, more specifically, through the observation port of the blast furnace blowpipe through the sealed refractory to seal the inner passage of the tuyere during furnace wall repair work The high pressure water of the high-pressure water spray pipe is inserted into a sealed refractory crushing device using the observation hole of the blast furnace blow pipe that can be completely crushed without the workload of the operator to increase the crushing efficiency.

In general, as shown in FIG. 1, the blast furnace operation of the steel mill alternately loads iron ore and coke into layers using a charging device (not shown) installed on the blast furnace 100 and alternately charges the blast furnace 100. When the hot air heated in the hot stove (not shown) is blown through a plurality of wind holes 120 mounted at a predetermined interval on the lower outer peripheral surface of the ring 100, the iron ore charged in the blast furnace 100 is It is reduced to produce molten iron and slag.

And, in the case of the large blast furnace 100, 34 air vents 120 to which hot air is supplied, and about 4 outlets 110 to which molten iron and slag are discharged are installed, and the blast holes 120 are blown with pulverized coal into the blast furnace. Blow pipes 130 having a pulverized coal injection line 140 is inserted, respectively, the blow pipes 130 are a plurality of branches from the ring-shaped blow ring pipe 150 is supplied with hot air is hot air from the hot air furnace It is connected to each branch pipe 151 is configured.

Accordingly, the molten iron and slag produced in the blast furnace 100 are alternately opened by alternating two diagonal exit ports 110, and continuously discharged to the outside of the furnace, and hot air is blown in the blower pipe 150. The right pipe 130 is supplied into the furnace through the tuyere 120 is inserted.

On the other hand, as part of the method for repairing the interior of the blast furnace for the long life of the blast furnace 100 as described above, the work of repairing the furnace wall requires a long period of rest, so after the absence of the blast furnace, each of the plurality of wind holes installed on the outer peripheral surface of the blast furnace bottom The tip of the 120 is sealed about 200 mm using a sealed refractory material in the form of clay.

The sealing of the tip of the tuyere 120 using the sealed refractory 170 prevents combustion of the coke in the furnace, secures the field of view for the observation in the furnace during the work of repairing the furnace wall, and minimizes the generation of gas, thereby minimizing gas generation. Is to protect.

In addition, a small number of tuyere 120 located at the upper portion of the outlet 110 to activate the melt of the furnace prior to the operation of re-blowing the hot air into the blast furnace, and to ensure the early heat by helping the smooth gas flow in the circumferential direction. Except for the tip of the plurality of air holes 120 is tightly sealed by octopus sealed refractory 170 is sealed.

Subsequently, when a certain time elapses after the start of re-blowing into the blast furnace, the operator maintains the air volume at 4500 m 3 / Min for a considerable time, and then performs a re-wind operation to supply the air volume at 2000 m 3 / Min. Sealing the tip of the tuyere 120 using a stick rod having a predetermined length in a state directly exposed to the spray, and crushing the sealed refractory material 170 fired at a high temperature to spray repair the furnace wall inside the blast furnace Then, it was necessarily performed.

However, in order to solve the problem that the safety is not guaranteed during the operation of manually crushing the sealed refractory 170 at the tip of the tuyere 120 exposed to high temperature hot air, Korean Utility Model No. 1998-25488 In Figure 2 (a) as shown in Figure 2 (a) to the inlet of the pulverized coal injection line (141) of the pulverized coal injection line (PCI: Pulverized Coal Injection) (140) which is mounted obliquely to the blow pipe 130 to blow the pulverized coal ( 145 is installed in a replaceable manner, and a high-pressure water sprayer 160 having a high-pressure water spray pipe 161 formed at the end of the socket 145 and the pulverized coal injection lance 141 is installed. .

Accordingly, the high pressure water spray pipe 161 is inserted into the sealed refractory 170 sealing the inner end of the blow pipe 130 so that the nozzle of the high pressure water spray pipe 161 is close to the high pressure. The high pressure water sprayed penetrated the end of the tuyere 120 closed as a sealed refractory.

However, the conventional working method has the following problems.

First, the operation of crushing the sealed refractory 170 inside the tip of the tuyere 120 through the high-pressure water injection pipe 161 inserted into the pulverized coal injection lance 141 is as shown in FIG. Since the installation angle Θ of the pulverized coal injection lance 140 is inclined at 54 °, the range of spraying high-pressure jetting water is limited, thereby limiting the crushing of the sealed refractory 170 completely. Lowered.

Secondly, three to four workers directly break the sealed refractory 170 by hand for a long time in the field to carry out the work through the tuyere 120 and at the same time another worker on the opposite side of the tuyere 120, blow There is a problem in that a lot of work load occurs because it must be checked from time to time whether the crushing through the observation port 131 installed to facilitate the internal observation on the pipe.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and its object is to provide a high pressure water spray pipe in which a sealed refractory sealing the inner passage of the tuyere is inserted into the blast furnace blow pipe observation hole during the furnace wall repair operation. The present invention provides a sealed refractory shredding apparatus using a blast furnace blow pipe observation port that can be completely shredded as a high-pressure water without a worker's workload to increase the shredding efficiency.

1 is a configuration diagram showing a blow pipe employed in a general blast furnace,

Figure 2 (a) (b) is a block diagram showing the structure and operation state of the sealed refractory seeding device according to the prior art,

3 is a longitudinal sectional view showing a connection portion and a sealing portion employed in the sealed refractory shredding apparatus using the observation port of the blast furnace blow pipe according to the present invention;

4 is an assembly view showing a sealed refractory crushing device using the observation port of the blast furnace blow pipe according to the present invention,

5 is a use state diagram showing the sealed refractory crushing device using the observation port of the blast furnace blow pipe according to the present invention,

Figure 6 is a detailed view showing the state of use of the sealed refractory crushing device using the observation port of the blast furnace blow pipe according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ...... Connection 11a ..... Female thread

12,22 ... inner hole 13 ...... Valve member

20 ...... Sealing section 23 ...... O-ring

24 ...... Screw member 24b ..... Steel ball

25 ...... End plate 26 ...... Packing member

30 ...... High pressure water spray section 31 ...... High pressure water spray pipe

32 ...... Spray gun 34 ...... High pressure water line

120 ..... Blowhole 130 ..... Blowpipe

131 ..... observation port 170 ..... sealed refractory

As a technical configuration for achieving the above object, the present invention,

Iron ore and coke are charged to the upper part, and a plurality of blowholes are mounted on the lower outer circumference, and a blowpipe equipped with a pulverized coal injection lance is provided to supply hot air and pulverized coal through the blowhole, and observe the inside of the furnace in the blowpipe. In the blast furnace for making molten iron and slag with a sphere

A hollow body in which a female member is formed on the inner circumferential surface of the distal end so as to be screwed with the male screw formed at the end of the observation port, and has a valve member for opening and closing the inner hole penetrating the center of the body at the center of length, and the female part of the quick joint is integrally mounted at the rear end. Cylindrical connection;

The male part assembled with the female part of the quick joint is integrally mounted at the front end, and the sealing O-ring is mounted on the inner circumferential surface of the inner hole passing through the center of the body, and the hollow cylinder cylindrical sealing part assembled at the rear end of the connection part;

A high pressure water line having a predetermined length of a high pressure water spray pipe horizontally inserted into the inner hole of the sealing part and the inner part of the connecting part, connected to a rear end of the high pressure water spray pipe by a connection pipe, and to which high pressure spray water is supplied. The present invention provides a sealed refractory crushing apparatus using a blast furnace blow pipe observation port, characterized in that it comprises a high pressure water injection unit for crushing the sealed refractory sealing the inside of the tuyere with high pressure water.

Hereinafter, the present invention will be described in more detail.

Figure 3 is a longitudinal cross-sectional view showing the connecting portion and the sealing portion employed in the sealed refractory crushing apparatus using the observation port of the blast furnace blow pipe according to the present invention, Figure 4 is a sealed refractory fracture using the observation port of the blast furnace blow pipe according to the present invention 5 is an assembly view showing the apparatus, FIG. 5 is a state diagram showing a sealed refractory crushing apparatus using the observation hole of the blast furnace blow pipe according to the present invention, Figure 6 is a seal using the observation hole of the blast furnace blow pipe according to the present invention It is a detailed figure which shows the use condition of the refractory crushing apparatus.

3 to 6, the apparatus 1 of the present invention is equipped with a plurality of tuyere 120 on the lower outer peripheral surface, pulverized coal blowing lance 141 to supply hot air and pulverized coal through the tuyere 120 The refractory wall of the blast furnace for manufacturing the molten iron and slag equipped with a blow pipe (130) equipped with a sealing refractory material filled to seal the inside of the tip end of the tuyere 120, the observation hole 131 of the blow pipe 130 As a high-pressure water of the high-pressure water spray pipe 31 inserted through, completely and safely crushed to penetrate through the tuyere 120, such a device (1) is a hollow-cylindrical connection portion 10, hollow-cylindrical sealing portion (20) and Consists of a high pressure water injection unit (30).

That is, the connecting portion 10 has a predetermined length of female threaded portion 11a formed on the inner circumferential surface of the tip so as to be screwed with the male screw portion 131a formed on the outer circumferential surface of the end of the observation port 131 mounted on the blowpipe 130. It is a hollow park member.

The valve member 13 is installed at the center of the body 11 of the connection part 10 so as to open and close the inner flow path of the inner hole 12 penetrating the center of the body so that the hot air in the blowpipe 130 is not discharged to the outside. The rear end of the body 11 is integrally mounted with an arm portion 40a of the quick joint 40.

And, the sealing portion 20 is formed through the inner hole in the center of the body, the end of the body 21 corresponding to the rear end of the body 11 of the connecting portion 10, the arm portion 40a of the quick joint 40 While the male part 40b to be assembled with the body is integrally mounted, the inner hole 22 of the body 21 has a length centered in close contact with the outer circumferential surface of the high-pressure water spray pipe 31 inserted into the inner hole 22. The o-ring 23 is mounted.

Here, the body 21 of the sealing portion 20 is formed through a plurality of threaded holes (24a) orthogonal to the inner hole 22, and the outer peripheral surface of the high-pressure water spray pipe 31 inserted into the inner hole The screw member 24 which elastically supports the steel ball 24b which contacts and supports below is assembled in each of the several screw hole 24a.

In addition, the steel ball 24b is inserted into the screw hole 24a so that it is difficult to be separated from the lower part, and the body part is exposed into the inner hole 22, and the steel ball 24b and the screw member 24 are exposed. A spring member may be provided between the steel balls 24b to elastically support the steel balls 24b directly below.

In addition, the rear end of the body 21 of the sealing portion 20 is assembled with a plurality of fastening members 25b, the end plate 25 through which the through-hole 25a corresponding to the inner hole 22 is formed. Between the end plate 25 and the rear end of the body 21, an annular packing member 26 having a U-shaped cross section is sealed to seal between the outer circumferential surface of the high-pressure water spray pipe 31 and the inner circumferential surface of the inner hole 22. Mount it.

On the other hand, the high-pressure water injection unit 30 for spraying high-pressure water to crush the sealed refractory 170, which is sealed inside the tuyere 120, the inner hole 22 and the connecting portion 10 of the sealing portion 20 It is inserted into the inner hole 12 of the high pressure water injection pipe 31 having a predetermined length such that the tip of the high-pressure water is injected into the sealed refractory 170 of the tuyere 120 is close.

The rear end of the high pressure water injection pipe 31 is connected to the injection gun 32 having the high pressure water injection adjustment knob 35 through the connecting pipe 33, and the injection gun 32 is connected to the high pressure from the outside. It is connected to the high pressure water line 34 to which the injection water is supplied.

Accordingly, the high pressure water is injected forward through the high pressure water injection pipe 31 or the injection is stopped by the operation of the handle 35 of the worker mounting the injection gun 32.

The operation of the present invention having the above configuration will be described.

After repairing the inner wall of the blast furnace 100, a plurality of remaining tuyere 120, except for a small number of tuyere 120 located above the outlet 110 during the operation of re-blowing the hot air into the blast furnace 100 is octoin Re-blowing is started in the closed state as a sealed refractory.

Then, a certain time elapses after the start of the re-ventilation operation, the gas flow and the other operation index within the blast furnace reaches the normal operation value, or the sealing that seals the internal passage of the tuyere 120 for artificial yellowing control. The refractory 170 is removed in a non-sensitized situation.

The female screw portion 11a of the connecting portion 10 is connected to the male screw portion 131a of the observation port 131 installed in the blowpipe 130 so that the internal state of the blast furnace 100 can be confirmed through the tuyere 120. By assembling the connecting portion 10 to the observation port 131.

In this state, the operation of removing the sealed refractory 170 of the tuyere 120 using the apparatus 1 of the present invention, first, the valve member 13 mounted on the body 11 of the connecting portion 10 By closing the operation to block the hot air inside the blast furnace 100 is discharged to the outside.

Then, the arm portion 40a of the quick joint 40 mounted at the rear end of the connecting portion 10 and the male portion 40b of the sealing portion 20 are assembled with each other to form the connection portion 10 and the sealing portion 20. The inner holes 12, 22 are assembled to communicate with each other.

Subsequently, the high pressure water injection pipe 31 of the injection gun 32 connected to the high pressure water line 34 is inserted into the inner hole 22 of the sealing portion 20, and the high pressure water injection pipe 31 The tip is inserted through the inner hole 22 of the connecting portion 10 to the vicinity of the valve member 13 which is closed.

And. Tighten or loosen the screw member 24 provided on the body 21 of the sealing portion 20 in a state where the tip of the high pressure water injection pipe 31 is inserted to the valve 13 so that the high pressure water injection pipe ( 31 and check the sealing state while adjusting the position of the high-pressure injection pipe 31 so that the center of the tuyere 120 coincides with each other.

When the position adjustment of the high pressure water injection pipe 31 and the checking of the sealing state are completed, the valve member 13 is opened to open the inner hole 12 of the connection part 10, and thereby the high pressure water Advance of the high pressure water injection pipe 31 having a length of about 3700 mm when the injection pipe 31 is advanced into the blow pipe 130 and its front end approaches the sealing refractory 170 of the tuyere 120. Terminate insertion.

In this state, when the high pressure jet water is supplied into the high pressure water injection pipe 31 through the high pressure water line 34 using the handle 35 of the injection gun 32, the end rotor is sprayed at high pressure. The sealing refractory 170 is crushed by high pressure water to open the air vent 120.

In this case, the high-pressure water spray pipe 31 is inserted into the inner hole of the blowpipe 130 horizontally to inject high-pressure water at a high pressure in a direction perpendicular to the surface of the sealed refractory 170, the sealed refractory The efficiency of crushing 170 can be improved.

In addition, the inner hole 22 of the sealing portion 20 is larger than the outer diameter of the high-pressure injection pipe 31, the inner hole 12 of the connection portion 10 is configured to a size smaller than the high-pressure injection pipe ( A predetermined size gap is formed between the inner circumferential surface of 31 and the inner circumferential surface of the inner hole 22 of the sealing portion 20. Accordingly, the high pressure water injection pipe 31 supported by the steel ball 24b at the lower end of the screw member 24 during the high pressure water injection is horizontally pressurized with the steel ball 24b. By spraying the high pressure water while inclining the tip of the) it is possible to completely crush the sealed refractory 170 remaining on the inner circumferential surface of the tuyere (120).

In addition, since the observation port 131 in which the high-pressure water injection pipe 31 is installed is provided at a height of 1000 mm from the bottom surface where the operator can easily approach, the operator inserts the high-pressure water injection pipe 31 to supply a high pressure. Workability of spraying water is convenient.

In addition, the sealing part 20 and the connection part 10 are connected to the quick joint 40 which is easily detachable, so that the assembly and disassembly of the device can be easily performed, and the sealing refractory 170 at the other air hole 120 is crushed. The following positional movement is easy.

According to the present invention as described above, by breaking the sealed refractory sealing the inner passage of the tuyere as high pressure water of the high-pressure water spray pipe inserted horizontally into the observation hole of the blowpipe, the sealed refractory of the tuyere after repairing the furnace wall of the blast furnace Since the working time and work load which are crushed can be reduced significantly, the blast furnace aging can be returned to normal normally, and the reduction of work volume can be prevented.

In addition, it is easy to control the furnace blast furnace, and the effect is obtained to safely protect the operator from hot air of high pressure and high temperature (1200 ℃) to prevent safety accidents.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (4)

Iron ore and coke is charged to the upper, a plurality of blowholes 120 is mounted on the lower outer peripheral surface, the blowpipe 130 equipped with a pulverized coal injection lance 141 to supply hot air and pulverized coal through the blowhole 120 In the blast furnace for manufacturing molten iron and slag by having an observation port 131 for observing the inside of the furnace in the blow pipe 130 A valve member (11a) is formed on the inner circumferential surface of the distal end so as to be screwed into the male screw portion (131) formed at the end of the observation port (131), and opens and closes the inner hole (12) passing through the center of the body (11). 12) having a center of the length, the rear end of the hollow-cylindrical cylindrical connection portion 10 is integrally mounted with the arm portion 40a of the quick joint 40; The male part 40b assembled with the arm part 40a of the quick joint 40 is integrally mounted at the tip, and the sealing O-ring 23 is mounted on the inner circumferential surface of the inner hole 22 passing through the center of the body 21. And the hollow-cylindrical cylindrical sealing part 20 which is assembled at the rear end of the connection part 10 and It is provided with a high-pressure water spray pipe 31 of a predetermined length horizontally inserted into the inner hole 22 of the sealing portion 20 and the inner hole 22 of the connecting portion 10, the high-pressure water spray pipe 31 It is connected via the rear end of the connection pipe 33 and the injection gun 32 is connected to the high-pressure water line 34 is supplied with a high-pressure injection water is sealed refractory 170 to seal the inside of the tuyere 120 Sealed refractory crushing device using the observation port of the blast furnace blow pipe, characterized in that it comprises a high-pressure water spraying unit for crushing the high pressure water. The method of claim 1, A plurality of threaded holes 24a orthogonal to the inner hole 22 are formed in the body 21 of the sealing part 20 and supported in contact with the outer circumferential surface of the high-pressure water spray pipe 31 inserted into the inner hole. Sealed refractory crushing device using a blast furnace blow pipe observation port characterized in that the assembly of the screw member (24) for supporting the steel ball (24b) to the lower portion in the plurality of screw holes (24a). The method of claim 1, At the rear end of the body 21 of the sealing portion 20, an end plate 25 through which a through hole 25a corresponding to the inner hole 22 is formed is assembled as a plurality of fastening members 25b, and the end Between the plate 25 and the rear end of the body 21 is equipped with a ring-shaped packing member 26 on the U-shaped section so as to seal between the outer peripheral surface of the high-pressure water spray pipe 31 and the inner peripheral surface of the inner hole 22. Sealed refractory shredding device using the observation port of the blast furnace. The method of claim 1, The inner hole 22 of the sealing portion 20 is larger than the outer diameter of the high-pressure injection pipe 31, the blast furnace blow pipe, characterized in that the size is smaller than the inner diameter of the inner hole 12 of the connection portion 10 Sealed refractory shredding device using the observation port.