KR200301056Y1 - Tundish Cover Device - Google Patents

Abstract

The present invention relates to a tundish cover device, the technical gist of which is connected to the outer shell 32 and the fixed bar 34, the plurality of fixed bars 34 are arranged in the width direction (X) therein. Steel body body 30 having a plurality of inner shell 36 is coupled in the longitudinal direction (Y) of the outer shell 32, and the fixing groove 32 'formed in the outer and inner shell (32) (34) The outer and inner and first and second internal fire retardants 46a, 46b and 46c are integrally coupled to the inside when the holder 44 to which the fixing bolt 42 is coupled through the 36 ' It characterized in that it comprises a fire retardant wiper 40 is sequentially coupled in the longitudinal direction (Y) of the iron shell (32, 36).

As a result, the tightness between the tundish cover and the main body is further improved, thereby maintaining the thermal insulation efficiency of the molten steel stored in the tundish, and eliminating the need to add a separate thermal insulation material, thereby reducing the cost and ingot due to the molten steel intrusion of the thermal insulation material. It is possible to prevent the degradation of the quality in advance.

Description

Tundish Cover Device

The present invention relates to a cover device for continuous casting tundish, which is covered to maintain the temperature of the molten steel stored in the tundish through the ladle nozzle, and more specifically, the tightness between the tundish cover and the main body is further improved. In addition, the insulation efficiency of the molten steel stored in the tundish is maintained, and the tundish cover prevents the cost reduction and the quality deterioration of the ingot due to the intrusion of the molten steel due to the need for a separate insulator. Relates to a device.

In general, in the continuous casting process, in order to inject molten steel (m) in the ladle 100 into the mold (mold) 130 as shown in FIG. 1, the molten steel is stored, and uniform molten steel distribution to the mold is performed. The molten steel (m) is stored in the tundish 110, which is a molten steel storage container, through the nozzle 110a of the ladle 100, and the molten steel in the tundish 110 is formed through a lower deposition nozzle 120. 130 is injected into the molten steel through the mold 130, and the continuous casting process of the ingot 140 is performed through the cooling extraction process.

Meanwhile, since molten steel is continuously supplied into the tundish 110 and supplied to the mold 130, a certain amount of molten steel must be stored in the tundish 110, and in particular, the temperature of the molten steel is kept constant. , The cover 200 to prevent the safety accident of the operator due to the air contact of the molten steel and the rapid heating of the tundish or the overflow of the molten steel is to be seated on the upper side of the tundish 110.

In the conventional tundish cover 200 associated with such a technique, as shown in Figs. 2 and 3, the tundish 110 of the main body shell 110b on which the fire retardant 110a is mounted on the inner circumferential surface of the tundish 110 is installed. The upper side is formed of a U-shaped cross-section and the lower side is made of a main body bar (210b) with a fire reed 210a is installed.

Therefore, when the molten steel (m) is supplied and stored into the tundish 110 and the thermal insulation material 220 is input, the safety accident due to the external leakage of the molten steel as the cover 200 covered by the upper side of the tundish 110 is prevented. Prevent and maintain the temperature of the stored molten steel, while the heat insulating material 220 maintains the temperature of the molten steel while floating on the surface of the molten steel to be supplied, and at the same time, prevents air contact to prevent the quality of the continuously ingot 140. To keep it.

However, in the conventional tundish cover as described above, as shown in Figures 1 to 3, because the cover 200 is simply covered above the main body of the tundish 110, the tundish 110 Due to the easily generated gap between the main body and the cover 200, not only the insulation efficiency of the molten steel (m) is lowered, but when molten steel is scattered into the gap, peripheral equipment may be damaged or a safety accident such as a burn may occur. There was concern.

In particular, the insulator 220 that is injected when the molten steel (m) is supplied is ingot into the molten steel (m) while being broken down into fine particles when rapid vortex phenomena and intense flow of the molten steel are generated. In addition to the extremely low quality, the use of a separate thermal insulation material 220, there were a number of problems, such as cost increases and cause environmental pollution.

The present invention has been made in order to improve the various problems as described above, the purpose of which is that the tundish cover is made in the shape of a boat (boat) to rise according to the supply amount of molten steel (m), while the cover and the tundish And due to the flux and argon gas filling between the molten steel and the cover, the tightness between the tundish and the cover is extremely improved, so that the temperature of the molten steel can be easily maintained and the quality of the ingot is extremely improved. .

In addition, another object of the present invention, there is no need for a separate thermal insulation material, there is no factor of cost increase, and in particular, the quality of the steel ingots due to the fine particles of the thermal insulation material in advance, as well as the problem of environmental pollution due to the thermal insulation material It is to provide a tundish cover device that can prevent the.

In addition, another object of the present invention is to provide a tundish cover device that is easy to combine the cover and the fire retardant of the cover device to facilitate the manufacture of the cover device and the installation on the tundish to improve the assembly workability There is.

1 is an overall configuration diagram showing a continuous casting process of a typical ingot

Figure 2 is a schematic front configuration diagram showing a conventional tundish cover

(A)-(d) is a front configuration diagram showing a cover according to the supply of molten steel in a conventional tundish

Figure 4 is a perspective view showing a tundish cover device according to the present invention

5 is a perspective view showing the main body part in the tundish cover device of the present invention

Figure 6 (a)-(d) is a perspective view showing the outer and inner fire retardant coupled to the iron body in the tundish cover device of the present invention

7 is a front configuration diagram showing a coupling state of the main body portion and the fire resistance in the tundish cover device of the present invention

Figure 8 is a front configuration diagram showing an operating state of the present invention tundish cover device

9 (a) and 9 (b) are main parts of the 'A' and 'B' portions of FIG. 8.

10 (a)-(d) are schematic front configuration diagrams showing a tundish cover device operating state according to a tundish supply of molten steel;

Explanation of symbols on the main parts of the drawings

1 .... ladle nozzle 10 .... tundish

20 .... Covering device 30 ....

32 .... outer shell 36 .... inner shell

40 ... fireproof widow 44 ... holder

46a, 46b, 46c .... Outer and 1st and 2nd internal fire retardant

50 .... argon gas pipe 50a .... through hole

As a technical means for achieving the above object, the present invention, in the continuous casting tundish for storing molten steel supplied through the ladle nozzle and injecting molten steel into the mold through the lower immersion nozzle to continuously cast ingots In

It has an inner shell of the rectangular frame shape in which the fixed bar is horizontally rolled in the width direction (X) to the inside, and the inner bar which is connected as the fixed bar and integrally coupled and fixed in the longitudinal direction (Y) to the inside of the outer shell. And, the outer and inner shells and the iron body portion is formed through a plurality of fixing grooves,

A plurality of outer and first and second internal fire retardant sequentially coupled in the longitudinal direction (Y) of the outer and inner steel shells are integrally coupled when the holder is screwed to the fixing bolt through the fixing grooves of the outer and inner steel shells are molded It is coupled to, by providing a tundish cover device made of a configuration comprising a fire-resistant lead portion is formed in the center and the body portion of the first inner edge and the argon gas pipe through.

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

Figure 4 is a perspective view showing a tundish cover device according to the present invention, Figure 5 is a perspective view showing the main body part, Figure 6 (a)-(d) of the outer and inner fire retardant coupled to the main body part Figure 7 is a perspective view, Figure 7 is a front configuration diagram showing the coupling state of the main body and the fire-resistant lead, Figure 8 is a front configuration diagram showing the operating state of the cover device, Figures 9 (a) and ( b) is a main view showing the 'A' and 'B' portion of Figure 8, Figure 10 (a)-(d) is a schematic front showing the operation state of the tundish cover device according to the tundish supply of molten steel It is a block diagram.

The tundish cover device 20 of the present invention is configured as a main body part 30 and a fire-resistant lead section 40, and stores the molten steel (m) injected through the lower nozzle (1) of the ladle and A tundish 10 for continuously casting the ingot by injecting molten steel (m) into the mold through the deposition nozzle is provided.

In addition, the iron shell body part 30 is connected to the outer shell 32 of the rectangular frame shape in which the fixed bar 34 is rolled up integrally in the width direction (X) to the inside, and connected as the fixed bar 34 and the outer An inner shell 36 is integrally coupled and fixed in the longitudinal direction (Y) to the inside of the shell 32, and the outer and inner shells 32, 36 has a plurality of fixing grooves (32 ') (36') ) Is formed through.

In addition, the refractory edge portion 40 is formed, the holder 44 is screwed to the fixing bolt 42 through the fixing grooves (32 ', 36') of the outer and inner shell 32, 34 formed. A plurality of outer and first and second internal fire retardant edges 46a, 46b, 46c which are integrally coupled to each other are sequentially coupled in the longitudinal direction Y of the outer and inner shells 32 and 36, Through-holes 50a through which argon gas pipes 50 are formed are respectively formed in the central portion and the body portion of the first internal refractory lead 46b.

On the other hand, the cover device 20 having the iron body portion 30 and the fire-resistant lead portion 40 is made of a configuration that is formed in a boat shape so as to float on the molten steel (m) supplied in the tundish (10). .

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

As shown in FIGS. 4 to 10, the thermal insulation and air of the molten steel (m) covered and stored in the tundish 10 for storing the continuous casting process of the molten steel (m) supplied through the ladle nozzle 1. The tundish cover device 20 which prevents contact with and improves the quality of the ingot is as follows.

First, as shown in Figures 4 to 6, the B-shaped steel plate in the longitudinal direction (Y) in the longitudinal direction (Y) to the inside of the outer shell 32, which is integrally welded in a square frame shape of the fixed bar (34) A plurality of inner shells 36a and 36b connected to the outer shell 32 is spoken, and the inner shell 36 is also made of a steel plate having a B-shape like the outer shell 32, wherein the inner shells Inner core bar 36b located in the middle of 36 is cut in the center to be an injection hole of molten steel (m) supplied from the ladle.

On the other hand, both sides of the outer shell 32 is formed in each of the front and rear locking grooves (32a) is connected to the link during the movement of the cover device 20, as will be described in detail later, the outer and inner shells (32, 36) There are formed a plurality of fixing grooves (32 ', 36') for engaging the fire retardant.

In addition, as shown in Figures 4 and 6, the bottom of the outer shell 32 and the outer shell 36 is combined with the refractory lead 40, the safety of the worker by the molten steel of extremely high temperature with the refractory lead At the same time serves to maintain the temperature of the stored molten steel, the refractory smoke (40), like the shell 30 is a structure in which a plurality are separated and combined.

At this time, the refractory wire 40 is a plurality of outer refractory wire 46a is coupled to the outside in the longitudinal direction (Y) of the steel bar 30 and a plurality of first coupled to the steel bar 40 to the inside, 2 is made of internal refractory wire 46b, 46c, and the first internal fire retardant wire 46b coupled to the center of the internal fire retardant wires 46b and 46c has a central portion thereof, and is cut off like the inner bar 36b. The difference between the first and second inner and outer refractory lead 46b, 46c and 46a of the molten steel m is that the protrusion 46d of the molten steel is introduced.

In addition, as shown in FIG. 7, in order to couple the refractory wire 46 to the steel bar 30, the holder 44 of the refractory wire 46 is formed inside of the refractory wire 46 when the refractory wire 46 is formed. It is installed in the longitudinal direction and the position coincides with the fixing grooves 32 'and 36' of the bar shells 32 and 36.

Accordingly, the fixing bolt 42 through the fixing grooves 32 'and 36' of the outer and inner shells 32 and 36 is a holder 44 inside the fire retardant 46 through the washer 42a. By screwing in, the fire retardant 46 is installed below the steel bar 30.

In particular, as shown in Figures 8 and 10, the cover 20 of the iron skin 30 and the refractory lead portion 40 is formed in a boat shape concave inside, the cover 20 The molten steel (m) is supplied to the inside of the tundish 10 through the cover 20 while the sidewalls thereof are in close contact with the inner refractory lead 10a of the tundish 10, and the water level thereof is increased. Increasing, the tightness between the tundish 10 and the cover 20 is maintained while floating like a boat according to the storage amount of the molten steel (m).

At this time, as shown in Figure 9, the molten steel (m) is stored in the tundish 10 and the outer wall surface of the refractory edge portion 40 of the cover 20 floating up to the upper side of the tundish 10 Filling the flux 60 between the inner refractory smoke (10a) and the through-hole 50a formed in the first internal fire retardant (46b) while at the same time more complete tightness of the tundish 10 of the cover 20 The argon gas pipe 50 is connected to each other, and the closeness of the molten steel (m) stored in the tundish 10 is maintained because argon gas A is filled in the center portion of the molten steel injection portion and the tundish 10. On the other hand, the contact between air and molten steel (m) is blocked, thereby greatly improving the quality of the steel ingot in the continuous casting process.

Accordingly, the iron body 30 and the fire-resistant lead portion 40 of the cover 20 which is installed to float along the molten steel in the tundish 10 can be easily coupled, and the tightness of the tundish 10 is improved. At the same time, there is no need to use a separate thermal insulation material, as well as maintaining the insulation of the molten steel, thereby improving the quality of the steel ingot.

As described above, according to the tundish cover device of the present invention, the tundish cover is manufactured in a boat shape and floated according to the supply amount of molten steel (m), while the flux filled between the cover and the tundish and between the molten steel and the cover. Due to the argon gas, the tightness between the tundish and the cover is extremely improved, so that the temperature of the molten steel can be easily maintained, thereby further improving the quality of the steel ingot.

In addition, there is no need for a separate cost increase because there is no need for a separate thermal insulation material, while it is possible to prevent the problem of environmental pollution due to the thermal insulation material and to prevent safety accidents of workers due to scattering of molten steel, thereby making the working environment safer. have.

In addition, the fabrication and installation work of the tundish cover device is easy to improve the assembly workability, there is an excellent effect that the fire retardant and replacement of the cover device is easily performed if necessary.

Claims (1)

In the continuous casting tundish 10 for storing molten steel (m) supplied through the ladle nozzle (1) and injecting molten steel (m) into the mold through the lower deposition nozzle to continuously cast ingots, Square bar-shaped outer shell 32, which is fixed to the width bar (X) integrally inwardly, and connected as the fixed bar 34, the longitudinal direction (Y) inward of the outer shell 32 The inner shell (36) is integrally coupled and fixed to the outer shell, and the outer shell and the inner shell (32, 36), a plurality of fixing grooves 32 ', 36' is formed through the iron shell body portion 30 And, A plurality of outer and first coupled to the holder 44, the fixing bolt 42 is screwed through the fixing grooves (32 ', 36') of the outer and inner shells (32) and (34) are integrally formed during molding. , 2 inner fire retardant (46a) (46b) 46c is sequentially coupled in the longitudinal direction (Y) of the outer and inner shell 32, 36, and the central portion of the first inner fire retardant (46b) and The tundish cover device, characterized in that the body portion comprises a flame retardant twist portion 40 is formed with a gas inlet (50a) is connected to the argon gas pipe (50)