KR200272222Y1 - Tundish Preheat Burner - Google Patents

Abstract

The present invention is a tundish to effectively prevent the combustion gas to be discharged to the outside by effectively sealing the inside and outside while the sealing plate flowing up and down by its own weight closely adheres the wool installed on the outer surface of the protrusion of the tundish cover to improve the preheating efficiency Regarding the burner for preheating burner,

In the crater for supplying the preheating combustion gas into the tundish by the outer shell which is mounted on the tip of the preheat burner through the bolt member, and the castable installed on the inner surface of the outer shell, the outer shell ( The lower end of 10) forms a closed curve to have a long hole receiving hole 16 having a long length vertically, the ring-shaped flow member 20 is accommodated in the long hole receiving hole 16 to be movable up and down, The bottom plate of the ring-shaped flow member 20 is integrally formed with a sealing plate 22 extending vertically through the hole 18 of the outer shell 10, a tundish cover on which the outer shell 10 is placed The outer surface of the protrusion 154 of 150 is characterized in that the wool 30 is installed to a predetermined thickness.

Description

Tundish Preheat Burner

The present invention relates to a preheat burner crater of a tundish in a continuous casting plant, and more specifically, a sealing plate that flows up and down by its own weight completely closes the inside and the outside while contacting the wool installed on the outer surface of the tundish cover. It relates to a crater for the preheat burner of the tundish to effectively block the discharge to the outside to improve the preheating efficiency.

In general, the tundish is preheated to a casting temperature of about 1,100 ℃ before continuous casting, for this purpose, the combustion gas such as LNG, COG is supplied to the preheater of the tundish cover through the preheat burner with air.

At the distal end of a conventional preheat burner, a crater 100 as shown in FIG. 1 is mounted through a bolt member 102 or the like. Such a crater 100 is slightly smaller than the inner diameter of the preheater of the tundish cover. The outer shell (110) having an outer diameter of a size having a rough shape, and the inside of the outer shell (110) Bracket depressed (Bracket Wool) or castable (Castable) (130) through the anchor 120 By constructing the combustion gas supply hole 132, the outer outer surface portion of the outer shell 110 is formed by extending the blade 140 in a predetermined length in the radial direction.

That is, as shown in FIG. 2, the conventional crater 100 allows the lower titrator to be inserted into the preheater 152 of the tundish cover 150 to supply the ignited combustion gas into the tundish. At this time, the wing 140 formed integrally with the outer shell 110 is mounted on the protrusion 154 of the upper end of the preheater 152 to prevent the gas inside the tundish from being discharged to the outside.

However, in the conventional crater 100, when the lower proper length of the outer shell 110 is fitted into the preheater 152, the high-temperature combustion gas is blown into the tundish with air. Since the outer shell 110 is directly exposed to high temperature environment and deterioration damage occurs in a short time, it is necessary to replace the fireball from time to time. Also, the castable which is damaged and damaged due to the deterioration of the anchor during the preheating operation is turned. Since it is mixed with molten steel during initial tundish molten steel injection into the mold by dropping out of the dish, they enter the immersion nozzle and become a deterrent such as being present as a suspended solid to hinder the flow of molten steel. There have been many cases of premature damage due to the deformation caused by, and to make it easier to install the crater in the tundish preheater. Since the outer diameter of the outer shell is slightly smaller than the inner diameter of the preheater, the combustion gas flows out between the gaps, which leads to a decrease in the preheating effect and an increase in the gas consumption. Exchange repair had a problem of increasing the operation load and the occurrence of working disorders such as a pause.

The present invention is to solve the problems of the prior art, it is possible to prevent the deformation of the combustion gas of the high temperature, prevent the falling of the castable construction, prevent the preheating gas leakage and improve the preheating effect of the tundish The purpose is to provide a crater for the preheat burner.

1 is a schematic cross-sectional view showing a crater for a preheat burner of the tundish according to the prior art;

Figure 2 is a schematic cross-sectional view showing a state in which the crater according to the prior art is equipped with a preheater of the tundish

Figure 3 is a schematic cross-sectional view showing a state in which the preheat burner of the tundish preheat burner according to the present invention

4 is a detailed view of the main part of FIG.

Figure 5 is an exploded perspective view showing a long hole receiving hole which is the main part of the present invention and a ring-shaped flow member mounted thereto.

Explanation of symbols on the main parts of the drawings

10 ... outer shell

12 ... Bracket

14 ... bolt member

16 ... long hole

18 ... hole

20 ... ring type flow member

22 ... sealing plate

30 ... wool

40 ... hole

42 ... heat dissipation fins

The present invention as a technical configuration for achieving the above object,

In the crater for supplying the preheating combustion gas into the tundish by the outer shell which is attached to the end of the preheat burner via the bolt member, and the castable installed on the inner surface of the outer shell.

The lower end of the outer shell is formed with a closed curve to have a long hole receiving hole having a long length up and down, the long hole receiving hole is a ring-shaped flow member is accommodated to be moved up and down, the outer iron at the lower end of the ring-shaped flow member Sealing plate vertically extending through the blood hole is formed integrally, and the outer surface of the protrusion of the tundish cover on which the outer shell is placed is provided with a crater for the preheat burner of the tundish, characterized in that the wool is installed to a certain thickness By

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

Figure 3 shows a state in which the preheat burner crater 1 of the tundish according to the present invention is mounted on the tundish cover 150, Figure 4 is a detail of the main portion of Figure 3, the crater 1 of the present invention Is mounted so as to be located on the outer surface of the preheating 152 side projection 154 of the tundish cover 150.

The crater 1 has an outer shell 10 that surrounds the outer surface of the protrusion 154 side of the preheating sphere 152 of the tundish cover 150, and an outer end of the outer shell 10 is vertically inward. It is bent to form a bracket 12 is formed to extend a predetermined length, the crater 1 may be mounted to the tip of the preheat burner via the bolt member 14 is fastened to the bracket 12.

The lower end portion of the outer shell 10 is provided with a long receiving hole 16 having a long length up and down while forming a closed curve which is bent to the inner diameter side and bent back to the upper side and continues to be bent to the outer diameter side, the long receiving hole ( 16, the ring-shaped flow member 20 is formed of a circular cross section is accommodated to be moved up and down, the lower end of the ring-shaped flow member 20 through a hole 18 penetrating up and down the lower end of the outer shell 10 The sealing plate 22 extending vertically outward is integrally formed.

Preferably, the sealing plate 22 is formed at a lower end thereof in a streamlined shape, and wool 30 is provided at a predetermined thickness on the outer surface of the protrusion 154 of the tundish cover 150.

In addition, a plurality of pin mounting holes 40 are formed radially in the outer steel bar 10 and the inner diameter thereof increases toward the outer diameter side, and the plurality of heat dissipating fins 42 having a split pin shape are formed in the pin mounting holes 40. Mount in the shape of crossing.

And, the inner surface portion of the outer shell 10 is castable 50 is constructed.

The crater 1 of the present invention having such a configuration, when supplying combustion gas such as LNG, COG, etc. to the preheating port of the tundish cover through the preheating burner with air through the bolt member 14 at the tip of the preheating burner. It is installed to prevent the combustion gas to be discharged to the outside to achieve a more effective preheating.

That is, when the crater 1 is placed on the protrusion 154 of the tundish cover 150, more specifically, on the outer surface portion of the wool 30 provided on the outer surface of the protrusion 154, the long hole receiving hole 16 The ring-shaped flow member 20 accommodated in the lower) is lowered by its own weight, whereby the lower end of the sealing plate 22 formed integrally with the lower side of the ring-shaped flow member 20 is in close contact with the wool 30, The combustion gas inside the tundish is completely blocked out.

In particular, when the ring-shaped flow member 20 is lowered so that the air existing in the upper inner space of the long hole-shaped receiving hole 16 is thermally expanded by the conduction heat transferred during preheating, so that the ring-shaped flow member 20 is kept in a lowered state. Applying pressure makes the sealing effect more secure.

In addition, the sealing plate 22 that closes and completely blocks the inside and outside while deforming the wool 30 also has a noise reduction effect of the workplace by relatively effectively blocking the noise transmitted from the inside of the tundish to the outside.

In addition, the heat dissipation fins 42 mounted on the holes 40 provided in the plurality of outer shells 10 serve to transfer heat of the outer shells 10 deteriorated in a high temperature environment to the outside for long time use. This effectively prevents the outer shell 10 from being damaged by deterioration.

According to the crater for the preheat burner of the tundish according to the present invention as described above, the sealing gas flowing up and down by its own weight closes the inside and the outside while closely contacting the wool installed on the outer surface of the protrusion of the tundish cover, so that the combustion gas to the outside It effectively blocks the discharge and improves the preheating efficiency.

In addition, the heat dissipation fins provided in the plurality of holes formed in the outer shells prevent the outer shells from deteriorating by prolonged use by dissipating the heat of the outer shells to the outside, thereby improving the life of the tundish preheating equipment.

Claims (2)

In the crater for supplying the preheating combustion gas into the tundish by the outer shell which is attached to the end of the preheat burner via the bolt member, and the castable installed on the inner surface of the outer shell. The lower end of the outer shell 10 forms a closed curve to have a long hole receiving hole 16 having a long length vertically, the ring-shaped flow member 20 in the long hole receiving hole 16 to move up and down It is received, the lower end of the ring-shaped flow member 20 is formed integrally with a sealing plate 22 extending vertically through the hole 18 of the outer shell 10, the outer shell 10 is placed Crater for the preheat burner of the tundish, characterized in that the wool 30 is installed to a predetermined thickness on the outer surface of the protrusion 154 of the tundish cover 150. According to claim 1, wherein the outer shell 10 is formed with a plurality of radially penetrating holes 40, the hole 40 is inserted into the heat dissipation fin 42 of the split pin shape to the outside of the heat of the outer shell A crater for preheat burners of tundish, characterized by dissipation.