KR102043547B1 - Continuors casting apparatus - Google Patents

Abstract

 The present invention is a mold in which a passage through which molten steel is formed; A cooling jacket portion cooling at least the mold; A chamber portion forming a gas chamber space to block the periphery of the molten steel from outside air; And a gas supply part for supplying an inert gas to the chamber part, wherein the supplied inert gas is discharged through at least one of the mold and the molten steel and between the mold and the cooling jacket part. It provides a continuous casting device for cooling the.

Description

Continuous casting device {CONTINUORS CASTING APPARATUS}

The present invention relates to a continuous casting apparatus with improved cooling performance.

It should be noted that the content described in this section merely provides background information on the present invention and does not constitute a prior art.

In general, a continuous casting process continuously injects molten steel into a mold of a predetermined shape, and continuously casts the reacted slabs into the lower side of the mold by slab, bloom, and billet. It is a process for manufacturing semi-finished products of various shapes such as billets.

Referring to Figure 1, the schematic configuration of a general continuous casting machine 1 is performed as follows.

A general continuous casting machine (1) is a ladle (ladle; 2) containing molten steel refined in the steelmaking process, and a tundish for temporarily supplying molten steel through an injection nozzle connected to the ladle (2). (tundish; 3) and the mold (4) for receiving the temporarily stored molten steel in the tundish (3) and initially solidified in a predetermined shape and the lower portion of the mold (4) to cool the unsolidified cast (5) And a cooling line in which a plurality of segments S are continuously arranged to perform a series of molding operations.

Copper and copper alloys are one of the most frequently used nonferrous metals as they have high electrical and thermal conductivity.

The main applications of copper and copper alloys are used in electrical connectors, gears, bearings, lead frames, and contact materials utilizing high-strength high-conductivity properties. New alloys are being discovered due to the increasing demand for high-strength alloys.

Copper and copper alloys use a process of melting and continuously casting raw metals for mass production. The continuous casting process, which is a mass production technology, is a process of obtaining a substrate by passing molten metal through a cooled mold, or obtaining a substrate by passing molten metal through a cooled pair of rollers, and a mold cooling method is mainly used for mass production. .

Among the new copper alloy new steel grades, Ni high alloy steel, Cu-W, Cu-Ti, Cu-Zr, Cu-Fe-P, etc., due to the solidification of the molten metal as a substrate during continuous casting, the liquid solubility difference over a wide temperature range in the state diagram (Liquid miscibility gap)

As a result, the partial liquid zone (Mush zone) phase transformation from the liquid phase to the solid phase has a relatively wide coagulation range of less than 150 ℃ to 300 ℃, and has a poor castability containing the possibility of phase separation and coarsening of precipitates.

For continuous casting of such a hard casting alloy, it is necessary to improve the heat transfer and heat exchange rate in the mold, thereby suppressing phase separation and precipitation growth and forming fine grains.

In conventional continuous casting, mold cooling is usually performed by indirect cooling by the flow of cooling water inside the mold. However, the non-cast copper alloy having a large partial liquid zone (Mush zone) is difficult to continuously cast by the conventional mold cooling method.

In order to continuously cast such a hard casting alloy, continuous casting may be possible by slowing the casting speed or improving the cooling performance of the mold.

KR 10-2004-0020490

In one aspect, the present invention provides a continuous casting apparatus in which a mold and molten steel can be additionally cooled, and an inert gas supplied protects the mold surface and the surface of the solidified molten steel from oxidation to improve surface quality. .

As one aspect for achieving the above object, the present invention is a mold in which a passage through which molten steel is formed; A cooling jacket portion cooling at least the mold; A chamber portion forming a gas chamber space to block the periphery of the molten steel from outside air; And a gas supply unit supplying an inert gas to the chamber portion, wherein the supplied inert gas cools the surroundings in a process of being discharged between the mold and the molten steel and between the mold and the cooling jacket portion. A first flow path, which is a minute gap, and a second flow path, which is a minute gap between the mold and the cooling jacket part, are formed between the mold and the molten steel, and the inert gas supplied to the gas chamber space includes: the first flow path; Provides a continuous casting device characterized in that discharged via the second flow path.

Preferably, the cooling jacket portion may be installed to face at least the gas chamber space and the mold, and may be heat exchanged with each other.

Preferably, the gas supply unit, the gas supply pipe is installed through the cooling jacket portion, and communicates with the gas chamber space of the chamber portion; And a supply tank for supplying an inert gas into the chamber through the gas supply pipe.

Preferably, the inert gas supplied from the gas supply unit may have a discharge path along the casting direction in which the molten steel moves.

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Preferably, the mold and the cooling jacket, the release material may be applied to the surface at least in the periphery of the first flow path, the periphery of the second flow path and the periphery of the second flow path.

Preferably, the mold and the cooling jacket part may have voids formed by bending of a surface at least around the first flow path among the periphery of the first flow path and the periphery of the second flow path.

As another aspect for achieving the above object, the present invention is a mold for forming a passage through which molten steel is passed in the transverse direction; A cooling jacket portion cooling at least the mold; A chamber portion forming a gas chamber space to block the periphery of the molten steel from outside air; A gas supply part supplying an inert gas to the chamber part; And a partition wall portion connecting the injection hole of the molten steel and the mold so that the molten steel is supplied to the mold, between the mold and the molten steel, and between the mold and the cooling jacket part. The supplied inert gas is discharged, and a first flow path having fine pores and a second flow path having fine pores between the mold and the cooling jacket are formed between the mold and the molten steel, and the inert gas supplied to the gas chamber space is formed. Is provided through the first flow path and the second flow path provides a continuous casting device.

Preferably, the mold may be formed through the discharge induction hole for inducing the discharge of the inert gas in the direction of the molten steel in the cooling jacket portion.

According to one embodiment of the present invention as described above, the casting and molten steel can be additionally cooled while the cooling performance of the continuous casting apparatus is improved, and the supplied inert gas protects the surface of the molten steel and the surface of the solidified molten steel from oxidation. There is an effect that can improve the surface quality.

1 is a view showing the entire installation of a conventional continuous casting device.
2 is a view showing a continuous casting apparatus according to an embodiment of the present invention.
FIG. 3 is an enlarged view of portion A of FIG. 2.
Figure 4 is a view showing a state after the molten steel, the mold shrinks as the continuous casting apparatus of FIG.
5 is a view showing a continuous casting apparatus according to another embodiment of the present invention.
6 is a view illustrating a state after the molten steel and the mold are contracted as the continuous casting apparatus of FIG. 5 is cooled.
7 is a view comparing the cooling performance of the present invention (shown in solid line) and the conventional method (shown in dashed line).

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Shape and size of the elements in the drawings may be exaggerated for more clear description.

Hereinafter, with reference to the drawings will be described in detail with respect to the continuous casting apparatus according to an embodiment of the present invention.

In the continuous casting apparatus of the present invention, the helium gas supplied by the gas supply unit 400 diffuses through the gap between the mold 100 and the molten steel S or the gap between the mold 100 and the cooling jacket 200. By effectively inducing heat exchange between the components can be obtained an additional cooling effect.

As the gas moves into the gap between the mold 100 and the molten steel S or the gap between the mold 100 and the cooling jacket 200, the mold 100 and the molten steel S may be additionally cooled. have.

The inert gas supplied from the gas supply unit 400 protects the surface of the mold 100 of the high temperature mold and the surface of the molten steel S from oxidation, thereby improving surface quality.

2 to 4 is a vertical casting apparatus is a continuous casting apparatus according to an embodiment of the present invention, Figure 5 to 6, a horizontal casting apparatus is a continuous casting apparatus according to another embodiment of the present invention It is shown.

2 to 4, a continuous casting apparatus according to an embodiment of the present invention may include a mold 100, a cooling jacket part 200, a chamber part 300, and a gas supply part 400. .

Referring to FIG. 2, the continuous casting apparatus includes a mold 100 in which a passage through which molten steel S passes, a cooling jacket part 200 for cooling the mold 100, and a periphery of molten steel S. Referring to FIG. And a chamber part 300 forming a gas chamber space 310 to block the external air from the outside air, and a gas supply part 400 supplying an inert gas to the chamber part 300, wherein the supplied inert gas is the mold. In the process of being discharged through at least one of between the 100 and the molten steel (S), and between the mold 100 and the cooling jacket portion 200 may be cooled around.

Referring to FIG. 2, the mold 100 has a passage through which molten steel S passes, and the molten steel S in the molten state is cooled and solidified into the cast steel while passing through the passage of the mold 100.

In one example, the molten steel (S) of the continuous casting device of the present invention may be composed of copper and copper alloy.

A solidification region S1 may be formed at a portion of the molten steel S that contacts the mold 100, and a non-solidification region S2 may be formed at a central portion of the molten steel S.

For example, as shown in FIG. 2, the mold 100 may have a passage through which molten steel S passes in the longitudinal direction.

As another example, as shown in FIG. 6, the mold 100 may have a passage through which the molten steel S passes in the horizontal direction.

The mold 100 may be provided as a mold 100 of carbon material.

The carbon mold 100 may be surrounded by the cooling jacket 200 and cooled while being heat-exchanged with the cooling jacket 200 by conduction.

The molten steel S may be cooled while passing through the mold 100, and solidification may proceed between the molten steel S and the mold 100 (interface) in the center direction of the molten steel S, which is the direction opposite to the thermal movement direction. Can be.

At this time, as the inert gas such as helium gas is diffused along the interface (interface) between the molten steel S and the mold 100, the mold 100 and the molten steel S may be more smoothly cooled.

The mold 100 and the molten steel S may be in contact with each other to cool the hot molten steel S, and at this time, the gas supplied from the gas supply unit 400 through a minute gap between the mold 100 and the molten steel S. While the flow can improve the cooling performance.

2 and 3, the chamber part 300 may form an internal space via which the inert gas supplied from the gas supply part 400 passes.

The chamber part 300 may form a gas chamber space 310 to block the periphery of the molten steel S from the outside air.

The gas chamber space 310 of the chamber part 300 may be formed in a space surrounded by the molten steel S, the cooling jacket part 200, and the mold 100.

The chamber part 300 may be installed to surround at least a portion of the molten steel S to block contact between the outside air and the molten steel S.

The chamber 300 may block inflow of external air to prevent the molten steel S from being oxidized, and the gas supply unit 400 may supply an inert gas to form an oxidized atmosphere.

The gas supply unit 400 may supply an inert gas such as helium, nitrogen, or argon gas into the inner space of the chamber 300 to prevent oxidation of the molten steel S.

2 to 4, the cooling jacket part 200 is a component that cools the mold 100 by exchanging heat with at least the mold 100.

The cooling jacket part 200 is made of a copper alloy (for example, bronze) having a high thermal conductivity, and includes a jacket body 210 in which a cooling flow path is formed, and a cooling tank for supplying a cooling medium to the cooling flow path of the jacket body 210. It can be provided.

The jacket body 210 may be provided with an inlet pipe 230 through which the cooling medium flows from the cooling tank to the jacket body 210 and an outlet pipe 250 for returning the cooling medium from the jacket body 210 to the cooling tank. have.

The cooling jacket part 200 may be disposed around the mold 100 to cool the mold 100 at least.

Of course, the cooling jacket 200 may cool the mold 100 and the inert gas supplied to the gas chamber space 310 of the chamber 300.

In addition, the cooling jacket 200 is installed in contact with the gas chamber space 310 that is the inner space of the chamber 300, the inert gas supplied to the inner space of the chamber 300 by the gas supply unit 400 Can be cooled.

Accordingly, the inert gas supplied by the gas supply unit 400 may be cooled by the cooling jacket unit 200, and the cooled inert gas may be formed between the mold 100 and the molten steel S and / or the mold. The cooling performance may be further improved while spreading through the gap between the 100 and the cooling jacket 200.

For example, the cooling medium of the cooling jacket part 200 may be composed of cooling water.

The mold 100 may be cooled by the cooling jacket 200, and the molten steel S may be cooled by the mold 100 cooled.

As shown in FIG. 2, the section (d) of the cooling jacket 200, the section (c) of the mold 100, the section (b) which is the solidification area S1 of the molten steel S, and the molten steel S A temperature gradient may be formed from low temperature to high temperature in the order of section (a) of the non-coagulation region (S2).

In one example, the temperature casting is formed in the vertical direction at the interface of the molten steel (S) can be continuously cast a hard cast copper alloy to form columnar grains structure in the center direction of the substrate.

Referring to FIG. 4, the width of the first flow path L1 and the second flow path L2 may increase as the mold 100 and the molten steel are cooled and contracted.

As the molten steel S is cooled by the cooled mold 100, the width of the first flow path L1 may increase.

That is, when the mold 100 and the molten steel S are simultaneously contracted, the width of the first flow path L1 and the width of the second flow path L2 are increased to increase the width of the first flow path L1 and the second flow path L2. Cooling performance of the mold 100 and the molten steel (S) may be further improved while increasing the flow rate of the inert gas moving through).

2 to 4, the gas supply unit 400 supplies an inert gas into the internal space of the chamber 300.

The gas supply unit 400 may pass inert gas into the internal space of the chamber 300.

2 and 3, the gas supply unit 400 may supply helium gas having a low density and high thermal conductivity to the gas chamber space 310 of the chamber unit 300 at a pressure exceeding atmospheric pressure.

The helium gas supplied to the gas chamber space 310 by the gas supply unit 400 diffuses through the gap between the mold 100 and the molten steel S or the gap between the mold 100 and the cooling jacket 200. By effectively inducing heat exchange between the components can be obtained an additional cooling effect.

Referring to FIG. 3, while the gas moves into a gap between the mold 100 and the molten steel S or a gap between the mold 100 and the cooling jacket 200, the mold 100 and the molten steel S are moved. Additional cooling effect can be obtained.

The inert gas supplied from the gas supply unit 400 protects the surface of the mold 100 of the high temperature mold and the surface of the molten steel S from oxidation, thereby improving surface quality.

That is, the inert gas supplied from the gas supply unit 400 may prevent the molten steel S from being exposed to outside air, such as the atmosphere, thereby improving the surface quality of the molten steel S, and the friction with the molten steel S at a high temperature. It is possible to prevent the oxidation of the surface of the mold 100 is generated.

The gas supply unit 400 supplies an inert gas into the inner space of the chamber unit 300, supplies the gas to the upper region of the mold 100 and the molten steel S, and forms a constant pressure while the supplied gas accumulates. , Through the gap which is a gap between the mold 100 and the molten steel (S).

For example, referring to FIG. 2, the gas supply unit 400 includes an inner space of the chamber part 300 surrounded by the mold 100, the cooling jacket part 200, the molten steel S, and a part of the chamber part 300. Gas may be supplied to the upper region of the.

The gas supplied to the upper region of the inner space of the chamber 300 may be discharged into the atmosphere through the minute pores between the mold 100 and the molten steel (S).

The gas supply unit 400 may supply an inert gas to the gas chamber space 310 of the chamber 300, but may pass through the cooling chamber 300 to supply the inert gas to cool the inert gas.

2 and 3, in the continuous casting apparatus of the present invention, the inert gas supplied to the gas chamber space 310 of the chamber part 300 is discharged between the mold 100 and the molten steel S. Or, it may be discharged via between the mold 100 and the cooling chamber 300.

At this time, the inert gas is diffused in the process of discharging the inert gas can be cooled around.

The inert gas supplied to the gas chamber space 310 is discharged through at least one of between the mold 100 and the molten steel S, and between the mold 100 and the cooling jacket 200, As the inert gas is diffused, the surrounding of the discharge path may be cooled.

Referring to FIG. 3, the supplied inert gas may cool the mold 100 and the molten steel S in the process of being discharged between the mold 100 and the molten steel S.

Specifically, the supplied inert gas is diffused between the mold 100 and the molten steel S while the inert gas such as helium is diffused while the surface of the mold 100 and the surface of the molten steel S are discharged. Can be cooled.

Referring to FIG. 3, the supplied inert gas may cool the mold 100 in a process of being discharged between the mold 100 and the cooling jacket part 200.

Specifically, the surface of the mold 100 on the discharge path may be cooled while the inert gas supplied is diffused between the mold 100 and the molten steel S while inert gas such as helium is diffused.

Referring to FIG. 2, diffusion of an inert gas such as helium gas may occur in a gap generated due to low wettability due to surface tension at an interface between the molten steel S and the mold 100.

Referring to FIG. 4, diffusion of an inert gas such as helium gas may occur due to a gap generated due to solidification shrinkage (bronze standard 1.8 * 10 ⁻⁵ / ° C.) of molten steel S.

At this time, between the mold 100 and the molten steel (S), and between the mold 100 and the cooling jacket 200 may be a rapid and efficient heat exchange through the discharged helium gas.

At the interface between the molten steel S and the mold 100, solidification proceeds in the center direction of the molten steel S, which is the direction opposite to the heat moving direction.

The continuous casting apparatus of the present invention can improve heterogeneous nucleation at the interface while improving the cooling performance of the mold 100 and the like, and thus lower the critical free energy required to form a stable nucleus in the liquid. .

In addition, since the supercooling degree required for heterogeneous nucleation in the casting process of copper alloy is generally in the range of 0.1 to 10 ° C., the finer and more uniformly distributed equiaxed grains are formed by improving the cooling performance. can do.

For this reason, the continuous casting apparatus of this invention can continuously cast the cast steel (substrate) whose surface is dense and has high intensity | strength.

FIG. 7 illustrates the present invention (shown in solid line) discharged through at least one of the mold 100 and the molten steel S, and between the mold 100 and the cooling jacket 200, and the mold ( 100) and the molten steel (S), and between the mold 100 and the cooling jacket portion 200 is a view comparing the cooling performance of the conventional method (shown in dashed lines) in which no inert gas is discharged. .

FIG. 7 illustrates temperature changes in sections (a), (b), (c) and (d) of FIGS. 2, 4, 5, and 6.

Referring to FIG. 7, the present invention cools the surroundings in a process of being discharged through at least one of between the mold 100 and the molten steel S and between the mold 100 and the cooling jacket part 200. By doing so, it can be seen that the cooling performance is improved while the temperature gradient is further extended to the sections (a), (b), (c), and (d) in the inlet gas (helium gas) discharge compared to the conventional method.

Continuous casting apparatus of the present invention by cooling the surroundings in the process of being discharged through at least one of between the mold 100 and the molten steel (S), and between the mold 100 and the cooling jacket portion 200, Cooling performance is improved compared to the continuous casting apparatus of the conventional method in which inert gas is not discharged between the mold 100 and the molten steel S and between the mold 100 and the cooling jacket part 200. It can be seen that.

2 and 3, the cooling jacket 200 may be installed to face at least the gas chamber space 310 and the mold 100, and may be heat-exchangable with each other.

The cooling jacket 200 may be installed at least in contact with the gas chamber space 310 and the mold 100.

That is, the cooling jacket 200 may be installed in contact with the inert gas supplied to the gas chamber space 310 and the mold 100 to exchange heat with each other.

Accordingly, the cooling jacket 200 may cool the mold 100 and the inert gas filled in the gas chamber space 310.

Referring to FIG. 3, the cooling jacket part 200 may be disposed in contact with the inert gas filled in the gas chamber space 310, and the cooling jacket part 200 may be disposed in contact with the mold 100.

Here, the meaning that the cooling jacket portion 200 and the mold 100 are disposed to be in contact with each other includes a case where a minute flow path (gap) through which an inert gas flows is formed between the cooling jacket portion 200 and the mold 100. It is a concept.

That is, between the mold 100 and the cooling jacket 200, there may be a fine gap in which the inert gas supplied from the gas supply unit 400 to the chamber 300 may move.

For example, the release material M may be coated on at least one surface of the mold 100 and the cooling jacket 200.

A mold release agent in powder form mixed with an organic solvent may be applied to the surface of at least one of the mold 100 and the cooling jacket part 200.

When the coated release material M is dried, the organic solvent may evaporate, the organic solvent may evaporate, and lead may move gas such as helium into the pores between the powders.

For example, the gas supply unit 400 may supply helium gas having a low density and high thermal conductivity to the gas chamber space 310 of the chamber unit 300 at a pressure exceeding atmospheric pressure.

Accordingly, the helium gas supplied by the gas supply unit 400 diffuses through the gap between the mold 100 and the molten steel S or through the gap between the mold 100 and the cooling jacket 200 and between the component members. By effectively inducing heat exchange, an additional cooling effect can be obtained.

As the gas moves into the gap between the mold 100 and the molten steel S or the gap between the mold 100 and the cooling jacket 200, the mold 100 may be additionally cooled.

2 and 3, the gas supply unit 400 is installed through the cooling jacket unit 200 and communicates with the gas chamber space 310 of the chamber unit 300. And a supply tank 430 for supplying an inert gas into the chamber 300 through the gas supply pipe 410.

For example, referring to FIG. 3, a gas chamber space 310 may be formed in an upper region of the mold 100 to surround the molten steel S with an inert gas.

The gas chamber space 310 may be formed in a space surrounded by the molten steel S, the cooling jacket 200, and the mold 100, and the gas chamber space 310 may be formed in the upper region of the mold 100. Can be formed.

The chamber part 300 may be installed to surround at least a part of the gas chamber space 310 in a state spaced apart from the upper end of the mold 100.

As the gas supply pipe 410 is installed through the cooling jacket part 200, the inert gas is cooled in advance while exchanging heat with a cooling medium flowing inside the cooling jacket part 200 before the inlet gas enters the internal space of the chamber part 300. Can be.

Referring to FIG. 3, the inert gas supplied from the gas supply unit 400 may have a discharge path formed along the casting direction T in which the molten steel S moves.

The discharge direction of the supplied gas may be set in a direction parallel to the casting direction (T), and further cooling may be performed while the discharged inert gas moves along the molten steel (S).

The gas supply unit 400 may supply the helium gas to the inert gas so as to have a pressure higher than or equal to atmospheric pressure in the chamber 300.

Inert gas supplied from the gas supply unit 400 may be composed of helium gas.

Helium has a thermal conductivity of about 0.151 W / m * K at room temperature and about 6 times higher than that of air.

Helium supplied from the gas supply unit 400 to the gas chamber space 310 is a light-weight, low-density inert gas of 0.17 g / liter at room temperature, and can be diffused into a very small gap enough to be used for leak testing of a vacuum apparatus. Exhaust speed is very good.

Referring to FIG. 2, a first flow path L1 that is a minute gap between the mold 100 and the molten steel S, and a second flow path that is a minute gap between the mold 100 and the cooling jacket part 200. At least one of L2 is formed, and the inert gas supplied to the gas chamber space 310 may be discharged through at least one of the first flow path L1 and the second flow path L2. have.

For example, both the first flow path L1 and the second flow path L2 may be formed.

That is, the first flow path L1 is formed between the mold 100 and the molten steel S, and the second flow path L2 is a minute gap between the mold 100 and the cooling jacket part 200. Can be formed.

The inert gas supplied to the gas chamber space 310 may be discharged via the first flow path L1 and the second flow path L2, and the first flow path L1 and the second flow path L2. As the inert gas is diffused in the process of passing through, the surroundings of the first flow path L1 and the second flow path L2 may be cooled.

The inert gas supplied from the gas supply part 400 to the gas chamber space 310 may be discharged to the outside via the first flow path L1.

Referring to FIG. 3, the supplied inert gas may be discharged through the first flow path L1 from the gas chamber space 310, and the inert gas such as helium may be discharged through the first flow path L1. As it diffuses, the surface of the mold 100 and the surface of the molten steel S disposed around the first flow path L1 may be cooled.

Referring to FIG. 3, the inert gas supplied from the gas supply part 400 to the gas chamber space 310 may be discharged to the outside via the second flow path L2.

In the process of discharging via the second flow path L2, the surface of the mold 100 disposed around the second flow path L2 may be cooled by diffusion of an inert gas such as helium.

Although not shown, as another example, the first flow path L1 may be formed, and the second flow path L2 may not be formed.

The inert gas supplied from the gas supply part 400 to the gas chamber space 310 may be discharged to the outside via the first flow path L1.

In this case, the supplied inert gas may be discharged through the first flow path L1 from the gas chamber space 310, and the inert gas such as helium may be diffused while being discharged through the first flow path L1. The surface of the mold 100 and the surface of the molten steel S disposed around the one flow path L1 may be cooled.

On the surface of the mold 100 disposed around the first flow path L1, which is a gap between the mold 100 and the molten steel S, the release material M is applied or the surface is bent (N, surface roughness difference). There exists a space which an inert gas can move by.

The surface of the cooling jacket portion 200 and / or the surface of the mold 100 disposed around the second flow path L2, which is a gap between the cooling jacket portion 200 and the mold 100, of the release material M There exists a space which an inert gas can move by application | coating or surface curvature (N, surface roughness difference).

For example, the mold 100 and the cooling jacket part 200 may be formed at least in the periphery of the first flow path L1 and in the periphery of the first flow path L1. Release material (M) may be applied to the surface.

The first flow path L1 may be formed by a gap of the release material M applied to the surface of the mold 100.

The second flow path L2 may be formed by the gap of the release material M applied to the surface of the mold 100 or the cooling jacket 200.

A release material M is applied to at least the mold 100 of the mold 100 and the cooling jacket part 200, and the voids of the release material M are formed in the first flow path L1 and the second flow path ( At least a first flow path L1 of L2 may be formed.

As the inert gas is diffused through the first flow path L1 and / or the second flow path L2, which are voids of the release material M, the first flow path L1 and the second flow path L2 may be discharged. Can cool the surroundings.

Voids of release material M applied to at least one surface of the mold 100 and the cooling jacket part 200 disposed in the region in which the first flow path L1 and the second flow path L2 are formed. Inert gas may be passed through.

The mold 100 and the cooling jacket 200 are curved in a surface at least in the periphery of the first flow path L1 and in the periphery of the first flow path L1. The voids can be formed by (N, roughness difference of the surface).

At least one of the mold 100 around the first flow path L1 or the second flow path L2 and the cooling jacket portion 200 is formed with a void by the surface N, and through the formed gap Inert gas can pass through.

At this time, the bending (N) of the surface of the mold 100 and the cooling jacket 200 may be formed by the roughness difference of the surface of the mold 100 or the roughness of the surface of the cooling jacket 200.

Referring to FIG. 2, even when the mold 100 and the molten steel S are almost in close contact with each other, or the mold 100 and the cooling jacket part 200 are in close contact with each other, the inert gas moves through the pores therebetween. The surroundings can be cooled by diffusion.

4, the gap between the mold 100 and the molten steel S or between the mold 100 and the cooling jacket part 200 may be increased while cooling the surroundings. As the flow rate increases, the cooling performance can be improved.

Next, with reference to Figures 5 to 6, it will be described in detail with respect to the continuous casting apparatus according to another embodiment of the present invention.

5 to 6, the continuous casting apparatus according to the embodiment of the present invention includes a mold 100, a cooling jacket part 200, a chamber part 300, a gas supply part 400, and a partition wall part 500. ) May be included.

5 to 6, a continuous casting apparatus according to another embodiment of the present invention is configured to cool a mold 100 and a mold 100 through which a passage through which molten steel S passes in a transverse direction. Cooling jacket portion 200, the chamber portion 300 to form a gas chamber space 310 to block the surroundings of the molten steel (S) from the outside air and the gas supply unit 400 for supplying an inert gas to the chamber portion 300 ), And the partition wall 500 connecting the injection hole of the molten steel S and the mold 100 to supply the molten steel S to the mold 100, and the mold 100 and the molten steel. An inert gas supplied from the gas supply unit 400 may be discharged through at least one of (S) and between at least one of the mold 100 and the cooling jacket 200.

5 and 6, in the continuous casting machine (horizontal continuous casting apparatus) of the present embodiment, the mold 100 may be supplied with molten steel S in the transverse direction.

As described above, the horizontal continuous casting apparatus is substantially the same as the vertical continuous casting apparatus described above, but between the injection hole of the molten steel S and the mold 100 in that the molten steel S is supplied in the horizontal direction. In the molten steel (S) may leak into the gas chamber space 310.

Therefore, the partition wall 500 connecting between the injection hole of the molten steel (S) and the mold 100 is provided so that the molten steel (S) is a gas chamber space between the injection hole of the molten steel (S) and the mold 100. And to prevent leakage to 310.

5 and 6, the mold 100 may be formed with a discharge induction hole 110 for inducing the discharge of an inert gas from the cooling jacket part 200 in the molten steel S direction.

The discharge induction hole 110 may be formed to be spaced apart from the mold 100 in the circumferential direction.

The mold 100 and the partition wall part 500 are sealed so that inert gas cannot flow between the mold 100 and the partition wall part 500.

In addition, in the case of the vertical continuous casting machine described above, the inert gas supplied between the mold 100 and the molten steel (S) may be discharged, but in the case of the horizontal continuous casting machine, the mold 100 and the gas chamber space 310. Between may be sealed by the partition 500.

Therefore, in the case of the horizontal continuous casting machine, the mold 100 may be formed through the discharge induction hole 110 to induce the discharge of the inert gas in the direction of the molten steel (S) in the cooling jacket (200).

Therefore, the inert gas supplied to the gas chamber space 310 may be discharged to the outside via the second flow path L2, the discharge induction hole 110, and the first flow path L1.

That is, the inert gas supplied to the gas chamber space 310 passes through the second flow path L2 between the cooling chamber part 300 and the mold 100, and the discharge induction hole 110 in the second flow path L2. ) May be discharged to the outside through the first flow path (L1) between the mold 100 and the molten steel (S).

The discharge induction hole 110 may be formed through the mold 100, and a plurality of discharge induction holes 110 may be radially spaced apart from each other in the circumferential direction of the mold 100.

At this time, the discharge induction hole 110 is disposed radially in the circumferential direction of the mold 100, it may be spaced apart at regular intervals.

At this time, the discharge induction hole 110 may communicate the second flow path (L2) and the first flow path (L1).

In order to prevent the non-solidified molten steel (S) from being damaged by the pressure of the inert gas introduced into the first flow path (L1) between the mold 100 and the molten steel (S) through the discharge induction hole 110, The discharge induction hole 110 may be formed in a portion of the solidification region S1 where the surface of the molten steel S is solidified.

The mold 100, the cooling jacket part 200, the chamber part 300, and the gas supply part 400 used in the continuous casting device of the present embodiment may include the mold 100 and the cooling jacket part of the continuous casting device described above. The same as the configuration of the 200, the chamber 300, the gas supply 400, a detailed description thereof will be omitted to avoid duplication.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and changes can be made without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

100: mold 110: discharge guide hole
200: cooling jacket portion 210: jacket body
230: inlet pipe 250: outlet pipe
300: chamber 310: gas chamber space
400: gas supply unit 410: gas supply pipe
430: supply tank 500: partition wall
L1: 1st flow path L2: 2nd flow path
M: Release material N: Bend
S: molten steel S1: solidification area
S2: non-solidification area T: casting direction

Claims (9)

A mold in which a passage through which molten steel passes is formed;
A cooling jacket portion cooling at least the mold;
A chamber portion forming a gas chamber space to block the periphery of the molten steel from outside air; And,
And a gas supply part supplying an inert gas to the chamber part.
The supplied inert gas is
Cooling the surroundings in the process of being discharged between the mold and the molten steel, and between the mold and the cooling jacket portion,
Between the mold and the molten steel is formed a first flow path of fine pores and a second flow path of fine pores between the mold and the cooling jacket portion,
The inert gas supplied to the gas chamber space is discharged via the first flow path and the second flow path.
The method of claim 1, wherein the cooling jacket portion,
And at least the gas chamber space and the mold, which face each other and are heat-exchangable with each other.
According to claim 1, The gas supply unit,
A gas supply pipe installed through the cooling jacket and communicating with a gas chamber space of the chamber; And,
And a supply tank for supplying an inert gas into the chamber through the gas supply pipe.
The method of claim 2,
Inert gas supplied from the gas supply unit continuous casting apparatus characterized in that the discharge path is formed along the casting direction in which the molten steel moves.
delete The method of claim 1, wherein the mold and the cooling jacket portion,
And a release material is applied to a surface at least in the periphery of the first flow path and in the periphery of the second flow path.
The method of claim 1, wherein the mold and the cooling jacket portion,
And a void is formed by bending of a surface at least in the periphery of the first flow path and in the periphery of the second flow path.
A mold in which a passage through which molten steel passes in a transverse direction is formed;
A cooling jacket portion cooling at least the mold;
A chamber portion forming a gas chamber space to block the periphery of the molten steel from outside air;
A gas supply part supplying an inert gas to the chamber part; And,
And a partition wall portion configured to connect the injection hole of the molten steel and the mold so that molten steel is supplied to the mold.
Inert gas supplied from the gas supply part is discharged between the mold and the molten steel and between the mold and the cooling jacket part.
Between the mold and the molten steel is formed a first flow path of fine pores and a second flow path of fine pores between the mold and the cooling jacket portion,
The inert gas supplied to the gas chamber space is discharged via the first flow path and the second flow path.
The method of claim 8, wherein the mold,
Continuous casting apparatus, characterized in that the through-hole induction hole for inducing the discharge of inert gas in the direction of the molten steel in the cooling jacket portion.

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