KR101543900B1 - Apparatus for preventing abrasion of tuyere - Google Patents

Abstract

The apparatus of the present invention for preventing damages to a large-sized airflow and a tornado is provided with a large-diameter bulb inserted into a blast furnace and a large-diameter bulb inserted into the large-bulb bulb to absorb a shock applied to a bulb, A protection means installed over the tuyere; And a cooling unit installed in the protection unit, the cooling unit cooling the large air hole and the tuyere, wherein the protection unit includes a tuyer protector formed to cover the front end surface and the outer surface of the large air hole and the tuyere; And a coupling part installed on the large wind tunnel and the wind tunnel protector and provided to connect and fix the air tunnel protector to the large wind tunnel and the tug valve, A discharge pipe insertion hole provided at a front end surface of the ventilation hole so as to discharge the supplied refrigerant to the outside; A supply hole connected to a pipe insertion hole and a pipe; And a discharge hole provided on the other surface of the tuyeres' guard and connected to the discharge pipe insertion hole through a pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for preventing damages of a large-

The present invention relates to an apparatus for preventing large-scale wind and damage to a tornado, and to an apparatus for preventing a large-sized wind tunnel and a tornado from damaging a torn portion in a blast furnace by impact and heat.

Generally, during the operation for producing molten iron in the blast furnace, real-time coke and ore are supplied from a storage tank containing the contents to be charged into the blast furnace, and charged into the blast furnace through the charging conveyor.

The coke and ore injected into the upper part of the blast furnace are subjected to a reduction and melting reaction in the blast furnace by the hot air supplied from the hot air supply device provided in the lower part of the blast furnace. Subsequently, the charcoal is produced by repeating the above-described series of operations.

A hot air supply device for blowing hot air at a high temperature in a blast furnace is composed of a conversion pipe capable of supplying hot air to the lower part of the blast furnace, a blow pipe serving as a flow path of hot air supplied from the conversion pipe, And a lance for blowing pulverized coal into the blast furnace.

1 shows the interior of a blast furnace 1, which comprises a bottom portion, a tuyere portion 10, a bosh portion 3, a valley portion, and a shaft portion from below. At this time, the fused portion is placed in the bore portion (10) of the bore portion (3) of the blast furnace (1) and almost half the molten material is filled.

At this time, the tongue portion 10 for blowing hot hot air is disposed close to the blast-furnace boss portion 3, and the large wind tunnel 20 is inserted and fixed in the blast furnace 2, And the tuyere 11 is inserted, and the blowing energy of the high temperature is transferred.

However, as shown in Figs. 1 and 2, the bosch portion 3 of the blast furnace 1 having a long lifetime has a problem in that, due to abrasion of the burned-out stove and the burned- And the whole is projected to the inside of the blast furnace 1.

When the charged material dropped from the upper part of the blast furnace 1 or the charged material causing the reduction or melting reaction comes into contact with the blast hole 10 of the blast furnace 10 in a state where the blast hole 10 is damaged, This causes the loss of tongue (11) causing a big accident.

In this case, the whole of the blast furnace 1 is stopped, and the damaged large wind tunnel 20 and the wind tunnel 10 are opened. (11) should be carried out.

Korean Patent Publication No. 10-2010-0007597

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a device for preventing damage to a large-sized airflow and a tornado which prevents damage to a leading end of a large-

Technical Solution In order to achieve the above object, the present invention provides a large-sized blast furnace having a blast hole inserted into a blast furnace and a blast furnace, Protection means installed over the large wind tunnel and the trough; And a cooling unit installed in the protection unit, the cooling unit cooling the large air hole and the tuyere, wherein the protection unit includes a tuyer protector formed to cover the front end surface and the outer surface of the large air hole and the tuyere; And a coupling part installed on the large wind tunnel and the wind tunnel protector and provided to connect and fix the air tunnel protector to the large wind tunnel and the tug valve, A discharge pipe insertion hole provided at a front end surface of the ventilation hole so as to discharge the supplied refrigerant to the outside; A supply hole connected to a pipe insertion hole and a pipe; And a discharge hole provided on the other surface of the tuyeres' guard and connected to the discharge pipe insertion hole through a pipe.

Preferably, the cooling means may include a plurality of cooling grooves provided in the tuyere protector and forming a predetermined path for the coolant to pass through the inside of the tuyere protector.

More preferably, the cooling grooves may further include barrier ribs provided at one side of the cooling grooves so as to make the flow direction of the coolant flowing through the cooling grooves different.

More preferably, the plurality of cooling grooves include: a first cooling groove provided at a position corresponding to the supply hole such that a coolant flowing into the supply hole is supplied to the inside of the torsion bar; And a second cooling groove formed at a position corresponding to the discharge hole so as to discharge the refrigerant from the tuyere protector to the outside.

More preferably, the fastening portion includes a coupling block provided to protrude at a predetermined height from one side of the large air flow passage or the air flow passage. And an engaging groove provided on one side of the tongue guard so that the tongue protector is coupled to the engaging block to form a concavo-convex portion corresponding to the engaging block.

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According to an embodiment of the present invention, it is possible to prevent a large-sized wind tunnel and a tug by preventing damage to a large-sized wind tunnel, and to prevent an accidental stoppage of the blast furnace. In addition, since the pause time of the blast furnace is remarkably reduced, continuous operation is possible, which contributes to improvement of productivity.

In addition, since the large wind tunnel and the tug are protected from heat loss due to fusion of the melt generated by the high temperature of the blast furnace and the abnormal operation, the life of the tug part is prolonged and stable operation can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a boshe portion and a trough portion inside the blast furnace.
Fig. 2 shows a damaged tuyere.
FIG. 3 is a view showing a ventilator according to a preferred embodiment of the present invention.
FIG. 4A shows a state viewed from the time point of 'A' in FIG.
And FIG. 4B shows a state viewed from the time point of 'B' in FIG.
FIG. 4C shows a state viewed from the viewpoint of 'C' in FIG.
5 is a schematic view of a protection means according to a preferred embodiment of the present invention.
6A is a schematic view of a cooling means according to a preferred embodiment of the present invention.
6B shows a state viewed from the viewpoint of 'E' in FIG. 6A.
FIG. 7A is a view showing a coupling relationship of a device for preventing large-scale wind and a tornado according to a preferred embodiment of the present invention.
FIG. 7B is a perspective view of a device for preventing large-scale wind and tornado damage according to a preferred embodiment of the present invention.

The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

In order to facilitate understanding of the embodiments described below, elements denoted by the same reference numerals in the accompanying drawings are the same elements, and a description of elements and techniques well known in the prior art will be omitted in order to clarify the gist of the present invention .

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

The tuyere portion 10 of the blast furnace 1 is provided with a ventilation hole 20 which is inserted into the blast furnace 1 and a ventilation hole And a tuyere (11). At this time, the tuyere (11) is occasionally referred to as a picnic.

FIG. 3 shows a ventilation hole 20 provided in the present invention. The upper portion of the ventilation hole 10 has a predetermined size and thickness. The left and right sides of the ventilation hole 10 are processed so as to form a uniform gradient .

A coupling block 35 having a predetermined shape and protruding at a predetermined height from the distal end surface of the ventilator 20 is provided at a rear end portion where the tuyere 11 is fixed.

In the front end portion of the tuyere 11, a hole connected to a certain inner portion of the tuyere 11 is machined. This hole has a supply pipe insertion hole (not shown) in which a supply pipe connected to supply the refrigerant supplied from the external supply means is inserted 51 and a discharge pipe insertion hole 52 into which a discharge pipe for discharging the supplied refrigerant is inserted.

Here, the refrigerant refers to means applicable within the technical scope of the present invention, and the type and form of the refrigerant are not limited in the present invention. However, for convenience of explanation, in the present invention, water supplied through a pipe (P) is applied as an example of the refrigerant.

In order to explain the structure of the ventilation openings 20 in greater detail, FIGS. 4A to 4C show the ventilation openings 20 of the present invention shown in FIG. 2 in the order of a front view, a plan view, and a rear view, respectively.

Referring to FIG. 4A, it can be seen that the supply pipe insertion hole 51 and the discharge pipe insertion hole 52 are formed side by side on the upper part of the vent hole 20. In particular, at the edge of the hole, an O-ring groove 57 is formed which is capable of preventing leakage of cooling water and inserting an O-ring provided for smooth supply of cooling water.

Further, as shown in FIG. 4B, the supply pipe and the discharge pipe start from the external refrigerant supply means, and are inserted from the front of the vent hole 20. Then, it penetrates the inside of the body of the vent hole 20 and is provided so as to protrude toward the front end face side. Therefore, the supply pipe insertion hole 51 and the discharge pipe insertion hole 52, into which the supply pipe and the discharge pipe are inserted, respectively extend from the front end portion to the front end portion of the diaphragm 20, So that it takes a structure of an obliquely penetrating hole.

FIG. 4c shows a state in which the ventilation hole 20 of the present invention is viewed from the rear. In the characteristic of the ventilation hole 20 formed to have a predetermined gradient from the front end to the rear end, So that the diameter of the rear end portion to be fixed is minimized. In addition, a coupling block 35 is provided at the rear end of the ventilation hole 20 so as to protrude at a predetermined height.

Next, the configuration and operation of the apparatus for preventing large wind and damage to the large wind tunnel according to the present invention will be described in detail.

The apparatus for preventing large-scale wind and torn damage is provided with protective means provided to absorb shock applied to a torn portion (10) formed close to the bosch portion (3) in the blast furnace (1) And cooling means for cooling the sphere 20 and the tuyere 11.

At this time, in order to prevent damage of the tongue portion 10 due to the contents falling from the upper portion of the blast furnace 1, the protecting means is formed so as to cover the front end surface and the outer surface of the tongue 20 and the tongue 11 by a predetermined area A tongue protector 31 provided and a fastening portion provided to connect and fix the tongue protector 31 to the tongue portion 10.

It is clear that the tuyere protector 31 can be changed most effectively depending on the working environment and the use environment, although it may be most effective to fabricate the tuyere with a purity of 99.9% or more.

The tongue protector 31 shown in FIG. 5 is provided so as to have a certain thickness downward from the top surface having a semicircular shape and the bottom surface is in contact with the tip end surface of the tongue portion 10, It is effective to have a semicircular shape like the upper surface so as to correspond thereto.

The fastening portion includes a fastening block 35 protruding at a predetermined height from one side of the large airflow 20 or the tuyere 11. The fastening block 35 has an engaging groove 35a ).

In other words, the engaging groove 35a, which is formed in a concave shape on one side of the tongue protector 31 so as to correspond to the engaging block 35 having a protruding shape, is provided with a sliding movement from one end to the other end of the engaging block 35 . ≪ / RTI > However, it is fabricated to be interference fit with the coupling block 35 so that it can be separated only by the operator's separation intention.

When the tongue protector 31 is coupled with the tongue portion 10 through the fastening portion, the tongue protector 31 covers the outer circumferential surface of the large air vortex 20 with a certain area. Extends in the longitudinal direction of the large-draft hole (20), and extends to the front end surface side of the tuyeres (11).

Therefore, the tongue protector 31 surrounds the coupling portion between the large-diameter tongue 20 and the tongue 11 and surrounds the outer circumferential surface of the tongue 10 by a certain area. Even if the torn portion 10 protrudes due to the damage of the bosch portion 3, before the torn portion 10 and the molten charge falling from the upper portion of the blast furnace 1 come into contact with the torn portion 10, And comes into contact with the upper surface of the tuyere protector 31 first.

Therefore, it is possible to protect the joint portion between the vent hole 11 and the ventilation hole 20, which may be relatively weak, and to protect the air hole portion 10 from the impact caused by the charge falling from the upper portion of the blast furnace 1 . With reference to the specific coupling relationship between the large air vortex 20, the tuyeres 11 and the tuyere protector 31, refer to Fig. 7A.

 Next, the cooling means provided to prevent damage to the air hole portion 10, which may arise from the high-temperature hot air blown into the blast furnace 1, will be described.

The cooling means is installed over the tuyere protector 31 and the ventilation hole 20. The ventilation hole is formed in the ventilation hole 20 for receiving and discharging the refrigerant. 3, a supply pipe insertion hole 51 is formed in the front end surface of the large draft hole 20 so as to receive cooling water from the external supply means, and the cooling water is supplied to the inside of the large- And a discharge pipe insertion hole 52 provided so as to be exhausted again after roughing is a part of the cooling means provided in the ventilation opening 20.

5, the protection means, that is, the tongue protector 31, is provided on one side of the tongue protector 31 and has a supply hole 51a (not shown) connected to the supply tube insertion hole 51 by a pipe, And a discharge hole 52a spaced a predetermined distance from the supply hole 51a at one side of the tuyere protector 31 and connected to the discharge pipe insertion hole 52 by a pipe. At this time, the supply hole 51a and the discharge hole 52a may be provided with screw grooves corresponding to the threads provided at the end of the pipe P so that the respective pipes P can be connected and fixed .

6A, the structure of the cooling means provided inside the tuyeres 31 is shown in more detail. A plurality of cooling grooves 53 are formed in the tuyere protector 31 to form a predetermined path through which the cooling water supplied through the pipe P passes through the inside of the tuyere protector 31. [

At this time, the supplied cooling water passes through all of the plurality of cooling grooves 53, and the plurality of cooling grooves 53 form a predetermined path so that the cooling water can pass through the inside of the tuyer protector 31.

First, the cooling water flowing into the inside of the tuyere protector 31 through the first cooling groove 54 provided at the position corresponding to the supply hole 51a passes through all of the plurality of cooling grooves 53, And is discharged to the outside through a second cooling groove 55 provided at a position corresponding to the discharge hole 52a so as to be discharged to the outside of the guard 31. [

In other words, the plurality of cooling grooves 53 disposed in the tuyeresguide 31 are arranged in the longitudinal direction of the tuyere protector 31, and are connected to the supply tube insertion holes 51 to form a plurality of cooling grooves 53 , The groove which firstly meets the cooling water becomes the first cooling groove 54. In the same principle, after the supplied cooling water has passed all through the tongue protector 31, the groove that reaches the exhaust hole 52a at the last time is passed through the second cooling groove 55.

Accordingly, the plurality of cooling grooves 53 take a structure interconnected to realize the above-described flow, and have a flow as shown in FIG. 6B.

At this time, a partition wall 56 may be formed on one side of the inside of the single cooling groove 53. The partition walls 56 serve to realize the cooling water flow directions different from each other in the single cooling grooves 53. This is to improve the cooling efficiency by increasing the flow rate of the cooling water. However, the shape and position of the partition 56 may be varied by the person skilled in the art within the technical scope of the present invention, and the purpose of installing the partition 56 is to increase the flow rate of the cooling water Any means falls within the scope of the present invention.

7A to 7B show the coupling relationship of the components of the apparatus as described above. 7A and 7B, when the blast hole 20 is replaced when the blast furnace 1 is stopped, the operation of the blind block 35 is stopped, The coupling groove 35a is slidably engaged and fixed.

A part of the tongue protector (31) protrudes by a certain area in the longitudinal direction of the large draft hole (20). The protruding portion covers the coupling portion to be protected when the tuyere 11 is later coupled.

Next, after an O-ring is fixed to the O-ring groove 57 disposed around the supply pipe insertion hole 51 and the discharge pipe insertion hole 52, the cooling water supply pipe and the discharge pipe are respectively inserted into the corresponding insertion holes Lt; / RTI > Each of the pipes P projecting back to the front end face portion of the large draft hole 20 along the supply pipe insertion hole 51 and the discharge pipe insertion hole 52 is connected to the supply hole 51a provided in the airflow guiding block 31 When screwed into the discharge hole 52a, the work for supplying the cooling water is completed.

Thus, when the operation for exchanging the large-flow hole 20 and supplying the cooling water is completed, when the tuyere 11 is pushed inward from the rear surface of the large-flow hole 20 and inserted, the state shown in FIG.

As described above, the apparatus for preventing large-scale wind and damage to torn air, which is coupled to the torn portion 10, absorbs the impact applied from the charge dropped into the blast furnace 1, and the heat loss of the torn portion 10 through the cooling water . Therefore, even if the stitches of the bosch portion 3 and the stave are worn and the bosch portion 3 becomes fragile, the tongue portion 10 can be protected.

1: Blast Furnace 2: Blast Furnace
3: Bosch portion 11: tungsten
20: Daiwu District 31: Fenggu Protector
35: engaging block 35a: engaging groove
51: supply pipe insertion hole 51a: supply hole
52: discharge pipe insertion hole 52a: discharge hole
53: cooling groove 54: first cooling groove
55: second cooling groove 56: partition wall
57: O ring groove

Claims (7)

The large-diameter air hole (20) inserted into the blast furnace (1) and the large air hole (20) inserted into the large air hole to absorb impact applied to the air hole (11) A protection means installed over; And
And cooling means provided in the protection means for cooling the large air hole and the air hole,
The protection means,
A tuyer guard (31) formed to cover the ventilation hole (20) and the tapered end surface and the outer surface of the tuyere (11); And
And a fastening part provided on the large wind tunnel and the torn guards to connect and fix the torn guards to the large wind tunnel and the tuyere,
Wherein the cooling means comprises:
A supply pipe insertion hole 51 provided on the distal end surface of the large draft hole 20 to receive the refrigerant from the external supply means;
A discharge pipe inserting hole 52 installed at a front end surface of the vent hole 20 to discharge the supplied refrigerant to the outside;
A supply hole 51a provided on one surface of the tuyeresguide 31 and connected to the supply pipe insertion hole 51 by a pipe P; And
An outlet hole 52a spaced apart from the supply hole at one side of the tuyere protector and connected to the discharge pipe insertion hole 52 by a pipe P;
And a device for preventing damaging of the large wind tunnel and the tornado.
delete delete The method according to claim 1,
Wherein the cooling means comprises:
A plurality of cooling grooves (53) installed inside the tuyere protector (31) and forming a predetermined path for the coolant to pass through the inside of the tuyere protector;
And an air damper for preventing the damper from being damaged.
5. The method of claim 4,
The cooling groove (53)
A partition wall (56) provided at one side of the inside of the cooling groove so as to make the flow direction of the refrigerant passing through the cooling groove different;
Further comprising means for preventing the damper from being damaged.
5. The method of claim 4,
The plurality of cooling grooves (53)
A first cooling groove (54) provided at a position corresponding to the supply hole so that a coolant flowing into the supply hole (51a) is supplied into the air guide protector (31); And
A second cooling groove (55) provided at a position corresponding to the discharge hole (52a) so as to discharge the refrigerant to the outside from the tornado protector (31);
And an air damper for preventing the damper from being damaged.
7. The method according to any one of claims 1 to 6,
The fastening portion
A coupling block 35 installed to protrude at a predetermined height from one side of the large air vortex 20 or the tuyere 11; And
An engaging groove 35a provided at one side of the tongue protector so that the tongue protector 31 is coupled to the engaging block 35 and forming a concavo-convex portion corresponding to the engaging block;
And an air damper for preventing the damper from being damaged.

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