KR100432130B1 - Tuyere nozzle intercepter and apparatus for smashing the same - Google Patents

Abstract

The present invention relates to a method for blocking tuyere, and more particularly, to block hot air by slicing wet loam inside the tuyere several times in a state of idle air, and in the operation of crushing the octopus fired during the evaporation process with high-pressure water, refractory to the inner diameter of the tuyere. Airtight blocker and hammer gun to break the blocker assembly by inserting and fixing the blocker assembly to have airtightness, and inserting the hammer gun crusher into the lance to break the blocker assembly washer by hammering and drilling. It is about.

Description

Refractory crushing apparatus using a blowhole bore and hammer gun {Tuyere nozzle intercepter and apparatus for smashing the same}

The present invention relates to a method for blocking tuyere, and more particularly, to block hot air by slicing wet loam inside the tuyere several times in a state of idle air, and in the operation of crushing the calcined october with high-pressure water during the evaporation process, refractory to the inner diameter of the tuyere. Airtight blocker and hammer gun to break the blocker assembly by inserting and fixing the blocker assembly to have airtightness, and inserting the hammer gun crusher into the lance to break the blocker assembly washer by hammering and drilling. It is about.

In general, when the blast furnace operation is to charge the iron ore and coke alternately in the layer from the charging device of the blast furnace, and blows the hot air heated in the hot blast furnace from the bottom of the blast furnace through the tuyere 20, the iron ore is reduced in the blast furnace molten iron And slag are generated.

In the case of large blast furnaces, they usually have 34 vents and 4 exits, alternately two diagonal exits, which continuously discharge the melt from the furnace, and 34 air blows into the furnace. It takes place through branches and air balloons.

On the other hand, in order to improve the life of the blast furnace, the furnace wall repair work, which is a part of the blast furnace internal repairing method, requires a long period of air shelter, so that a plurality of end of the tuyere immediately after the air blast using mud-shaped refractory (hereinafter referred to as "octo"). It aims to protect the spray device for maintenance by minimizing the outlook and minimizing gas generation for in-house observation during the operation of the furnace coke combustion prevention and the renovation of the furnace wall. In order to secure early aging, many of the remaining vents, except for the few vents located at the top of the exit, are re-closed with octopus and solidified (about 300 mm).

If a certain time elapses after the start of re-blowing, the air flow is maintained at a flow rate of 4,500 m 3 / min for a considerable time, followed by re-winding operation (2,000 m 3 / min), and the operator is directly exposed to high hot air of 1,200 ° C. or higher. The process of crushing the fired octopus by hand using a stick rod takes the blast furnace operation method, which inevitably goes through the furnace wall spray repair work.

In this regard, as shown in FIG. 5, Korean Patent Application No. 1998-25488 discloses that the octopus, which was closed at the blast furnace in the blast furnace at the time of remanufacturing, is closed with octopus using water supplied from a jet washer. The coke was re-burned by passing normal hot air into the blast furnace.

In addition, in order to crush the octopus closed at the tip of the blast furnace, quick couplers are assembled on the valves behind the Pulverized Coal Injection (PCI) for easy assembly and a sealing device is provided to block the blowing of hot air in the blast furnace. Then, after inserting the through lance attached with the two-caliber injection nozzle inside, the method of penetrating the tuyere closed with october using water supplied from the jet washer high pressure water was taken.

However, the conventional working method has the following problems.

First, the cooling water introduced during penetration is absorbed into the refractory of the inner surface of the blow pipe so that it is dropped due to thermal expansion or is easily worn to shorten the life.

Second, when the delayed through and unpenetrated water flows into the furnace, the wind pressure may change rapidly due to a sudden increase in the amount of bosh gas, and it is difficult to secure early heat as the coke is cooled in front of the tuyere.

Third, there is a problem that the work load occurs because three to four workers must penetrate and check by hand manually for a long time in the field.

The present invention has been devised to solve the above problems, the hot air is blocked several times by dipping wet loam inside the tuyeche in the idle state, in the operation of crushing the octopus fired during the evaporation process with high-pressure water, the inner diameter of the tuyere Airtight blockers and hammer guns that have airtightness by inserting and fixing the refractory block plate assembly in the airtight, and inserting the hammer gun shredding device into the lance to break the block plate assembly washer by hammering and drilling to separate the block plate assembly. The purpose is to provide a shredding device.

1 is a state diagram showing a method for blocking the inside of the tuyere using a conventional octopus,

Figure 2 is a perspective view (a) and cross-sectional view (b) of the inside diameter block of the tuyere according to the present invention,

3 is a perspective view of the apparatus for removing the inside diameter block of the tuyere, according to the present invention;

Figure 4 is a perspective view of the insertion hole inside diameter blocking plate,

5 is a cross-sectional view of the hammer gun crushing device and the lance coupling;

6 is a configuration diagram according to the present invention,

7 is a process chart according to the present invention.

<Description of Symbols for Main Parts of Drawings>

20: blowhole 30: blow pipe

40: lance 42: quick joint

70: fireproof disc 71: fireproof washer

72: fireproof block 75a: lock pin

80a: lock groove 80c: feed bar

100: cylinder 110: shaft

110a: bit 130, 130a: seal cap

150 hammer gun 170, 170a oil ring

Refractory crushing device using the windshield bore block and hammer gun of the present invention for achieving the above object,

Since the inner diameter of the tuyere 20 forms a trapezoid, the outer diameter face has a trapezoidal cylindrical shape so as to be tightly fixed to the inner face of the tuyere 10 to have airtightness, and a support plate 70 of a refractory material having a convex surface, and the disc 70 A pin 75 and a spring 74 are integrally fixed to the refractory block 72 inserted into and tightly coupled to the inner diameter and the refractory washer 71 integrally fixed to the convex surface of the refractory support disc 70. A hot air blocking plate;

A transfer bar (80c) for transferring the hot air blocking plate to the inner diameter of the blow pipe (30) and the tip end (20);

The hammer gun 150 coupled to the cylinder 100 to the lance 40 and reciprocating the shaft 110 into the lance 40 to enter the inner diameter of the tuyere 20 to crush the hot air blocking plate 70. Hot air blocking plate blocking device consisting of; It includes.

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

Hot air blocking plate according to the present invention is to be fixed to the inner diameter surface of the air duct to block the hot air during the blast furnace blowing, as shown in Figure 2, the plate having a convex surface of the refractory material to be fixed in close contact with the inner diameter surface of the air duct (20). The outer diameter is trapezoidal in the die-shaped support disk 70 to be in close contact with the inner diameter surface of the wind hole 20 to have airtightness, and an adhesive material insertion groove 70a is formed in the circumferential direction of the outer surface of the plate-shaped disk 70.

In addition, the inner surface of the plate disc 70 is trapezoidal circular, so that the refractory block 72 is easy to engage and drop, the groove having a jaw on the outer surface of the disc 70 is penetrated one side.

On the other hand, the plate disk 70 is formed of a trapezoid so as to be in close contact with the trapezoidal surface of the inner diameter is formed a high-strength refractory block 72 for supporting the disc 70.

Further, the spring 74 is in close contact with the groove of the support block 72 by the groove of the disc disc 70, and the spring 74 inserted into the disc inner diameter of the disc disc 70 is inserted into the disc inner diameter. When the refractory washer 71 is inserted into the groove of the disc disc 70 while supporting the spring 74, the washer 71, the disc disc 70, the buffer spring 74, and the support block 72 are integrally formed. When the cylindrical shaft pin 75 is inserted into the blocking plate assembly groove and tightened by the nut 75c to have the blocking plate assembly and the blocking plate assembly is not separated, the spring 74 inserted into the blocking plate is cushioned. While being airtight, the inner diameter blocking plate 20 is configured.

The lock pin 75a is fixed to the outer circumferential surface of the blocking plate cylindrical shaft pin 75, and is inserted into the shaft pin 75 to protrude the lock pin 75a. (80a) having a groove (80a) in communication with the distal end side on the outer diameter surface of the cylinder (80), the spring 80b is embedded in the inner diameter of the lock pin (75a) and the transfer bar (bar) It has a long bar (80c) and a handle for easy mounting on the rear end to secure the coupling to the front end side cylindrical groove (80a) of the (80c) and to transfer the blocking plate to the inner diameter of the tuyere (20) It has a blocking plate conveyance bar 80c.

Meanwhile, as illustrated in FIGS. 3 and 5, the oil cylinder 100 of the inner diameter blocking plate crushing device of the tuyere 20 forms a threaded portion at the front and rear end inner surfaces of the cylindrical oil cylinder 100, and the oil cylinder 100. ) Oil caps 120 and 120a having threaded portions are fastened to the inner and outer ends of the front and rear ends, and the inner diameters of the inner ends of the inner threaded portions of the cylinder 100 and the inner diameters of the oil caps 120 and 120a are in close contact with each other. When the seals 160 and 160a are inserted to seal the oil, and the seal caps 130 and 130a having threads are formed on the outer diameter surfaces of the front and rear ends of the oil caps 120 and 120a, the front ends of the seal caps 130a are fastened. By having a groove in the fastener 42 is fastened so as to be integrally integrated with the inner surface protrusion of the quick joint 42 of the lance 40 and the groove of the seal cap 130a at the front end of the secondary blocking side 41 attached to the pulverized coal injection lance 40. The heat resistant double oil rings 170 and 170a may be disposed on the inner surface of the oil caps 120 and 120a and the inner surface of the seal caps 130 and 130a. A cylindrical shaft 110 is inserted into the inserted oil cylinder portion and penetrated into the front and rear ends of the oil cylinder 100, and the front end portion of the shaft 110 has a screw part so as to be replaced by wear when crushing the refractory. 110a), and the bit 110a has an outer diameter larger than the outer diameter of the shaft 110, so that when inserted into the lance 40, the bit hole 20, the inner diameter blocking plate of the refractory washer 71, and , The shaft 110 is configured to serve as a stop wave to be caught by the seal cap (130a) when retracted.

On the other hand, the buffer spring 140 is inserted into the outer diameter surface of the rear end of the shaft 110, and the washer cap 110b is fastened to the threaded portion to prevent the spring 110b from being detached and the rear end of the shaft 110. By having a square protrusion, the hammer gun 150 is integrated to break the tuyere inner diameter blocking plate while simultaneously hammering and drilling.

Referring to the operation of the present invention configured as described above are as follows.

In order to close a large number of remaining tuyere 20 except for a few tuyere 20 located in the upper part of the exit opening before the re-blowing operation with the blocking plate 70, the blocking plate shaft pin 75 is transferred to the tip of the transfer bar 80c. Inserted into the cylinder 80, the blocking plate lock pin (75a) and the transfer bar (80c) is combined with the cylindrical groove (80a) and firmly, and a heat-resistant adhesive is applied to the blocker outer peripheral surface adhesive groove (70a), blow pipe 30 ) The blocking plate 70 is tightly fixed to the inner diameter surface of the tuyere 20 through the pesto cover 30a. When the blocking plate 70 is fixed and the pressing bar 80c is rotated by pressing, the blocking plate 70 and the feeding bar 80c are separated by the inner spring 80b of the cylinder 80 of the feeding bar 80c. .

As such, when the closing of the plurality of tuyere 20 is completed, the blast furnace operation is resumed, and after a certain period of time after the start of the re-blowing operation, the circumferential gas flow and other operating index reaches the normal operation value or artificial aging In order to control the closed tuyere 20 to remove the blocking plate 70 in a non-sensitized situation.

Meanwhile, removal of the blocking plate 70 will be described with reference to FIGS. 6 and 7.

The pulverizer cylinder seal cap 130a is fastened and integrated with the conventional pulverized coal injection lance 40 quick joint 42, and the lance 40 secondary blocking side 41 is opened.

In addition, since the oil is filled in the cylinder 100 when the hammer gun 150 is pushed while drilling the shaft 110, hot air is not leaked out, and the shaft 110 is smoothly advanced while the tip 110a of the shaft 110 is advanced. When close contact with the blocking plate 70, the refractory washer 71, the hammer gun 150 is crushed by hammering, drilling the block plate 70, refractory washer 71.

Since the blocking plate 70 is crushed at the moment when the refractory washer 71 is crushed, the blocking plate 70 is crushed continuously by high pressure hot air, so that the blocker 70 is crushed in sequence, the instant when the refractory washer 71 is crushed, the blocking plate ( 70, the inner spring 74 pushes and removes the refractory block 72 supporting the disc 70, and at the same time, a high pressure hot air flow path is formed, and the plate disc 70 having weak bearing force is crushed, and the shaft pin ( 75), the hot air flow passage is formed by the domino phenomenon in which the spring 74 and the support block 72 are sucked into the furnace by the high pressure hot air.

On the other hand, the spring 140 is inserted into the rear of the shredding device shaft 110, the spring (140) is buffered that the bit 110a is in close contact with the block 20 washer 71, the hammering and drilling occurs. When the worker is protected from impact, the bit 110a and the air port 20 blocking plate washer 71 are brought into close contact with each other, and the breaking force is increased. When the fracture is completed and the shaft 110 is retracted, the bit 110a becomes a cylinder. (100) It is prevented from being retracted further by the seal cap 130a, and closes the pulverized coal injection lance 40 and the secondary blocking side 41, and the cylinder seal cap 130a and the lance 40 quick joint 42. After the separation, the borehole block is removed to reach normal operation.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of the claims to be described below.

According to the present invention, in the process of normalizing the distribution of the contents of the furnace when the re-ventilation operation after a long period of absence of sleep, the shroud plate crushing operation is made in a non-sensitized situation using the shroud inner blocker and hammer shredding device, It eliminates the causes of changes in the shape of the charges and collapse of the heat and balance of the circumference of the column, secures the fluidity of the bottom of the melt, and facilitates the work of the tapping material.In addition, the gas flow and other operation index and the artificial operation value of the column It is easy to control yellowing because it determines whether the closed wind hole penetrates according to the change of the air volume and the wind pressure during the re-blow operation to maintain it, and the worker's safety is remarkably improved from the hot air of high pressure and high temperature (1,200 ℃). There is also an effect that can be greatly reduced.

Claims (1)

Since the inner diameter of the tuyere 20 forms a trapezoid, the outer diameter face has a trapezoidal cylindrical shape so as to be tightly fixed to the inner face of the tuyere 10 to have airtightness, and a support plate 70 of a refractory material having a convex surface, and the disc 70 A pin 75 and a spring 74 are integrally fixed to the refractory block 72 inserted into and tightly coupled to the inner diameter and the refractory washer 71 integrally fixed to the convex surface of the refractory support disc 70. A hot air blocking plate; A transfer bar (80c) for transferring the hot air blocking plate to the inner diameter of the blow pipe (30) and the tip end (20); The hammer gun 150 coupled to the cylinder 100 to the lance 40 and reciprocating the shaft 110 into the lance 40 to enter the inner diameter of the tuyere 20 to crush the hot air blocking plate 70. Hot air blocking plate blocking device consisting of; Refractory crushing device using a windshield bore block containing a hammer gun.