KR102264780B1 - Cooling apparatus for continuous casting - Google Patents

Abstract

Provided is a cooling apparatus for continuous casting, capable of reducing surface cracks on a slab during a continuous casting process of steel. The cooling apparatus according to the present invention includes a steam recovery chamber for recovering steam generated during cooling of a slab, a cooling water supply device for supplying cooling water of a reference temperature to the slab, and a position-specific cooling water temperature control unit for recovering the heat of steam supplied from the steam recovery chamber and controlling the temperature of cooling water according to position in the width direction of the slab.

Description

Cooling device for continuous casting {COOLING APPARATUS FOR CONTINUOUS CASTING}

The present invention relates to a cooling device for continuous casting.

In general, during continuous casting of steel, the edge dam installation method or cooling water control method prevents excessive cooling of the corner of the slab in the secondary cooling zone.

However, in the edge dam installation method, when the casting width of the slab is changed, it is difficult to respond with a mechanical device, so the effectiveness is reduced. The cooling water control method that reduces the amount of cooling water in the corner or cuts off the supply of cooling water to reduce heat transfer Even if the temperature is reduced, the temperature of the coolant is the same at the corner and the center, so there is a limit to adjusting the amount of coolant, and when the supply of coolant is cut off, the temperature of the edge portion becomes too hot.

An object of the present invention is to provide a cooling device for continuous casting capable of maximally reducing surface cracks occurring in a slab during a continuous casting process of steel.

A cooling device for continuous casting according to an embodiment of the present invention comprises: a water vapor recovery chamber located above a slab passing through a cooling zone during continuous casting of steel and for recovering water vapor generated during cooling of the slab; It is disposed on the outside and may include a cooling water supply device for supplying cooling water of a reference temperature to the slab.

In addition, the cooling device for continuous casting recovers the heat of steam supplied from the steam recovery chamber and controls the water temperature of the cooling water supplied to the corner, off-corner, and center regions of the slab according to the position in the width direction of the slab. It may include a cooling water temperature control unit for each location.

The cooling water temperature control unit for each position is disposed outside the water vapor recovery chamber, and is a corner cooling water for supplying cooling water of a first set temperature generated by mixing water vapor supplied from the water vapor recovery chamber and cooling water of a reference temperature to the corner region. A supply may be included.

The cooling water temperature control unit for each position is disposed between the corner cooling water supply device and the slab, and the cooling water of the second set temperature is generated by mixing the cooling water of the first set temperature and the cooling water of the reference temperature supplied from the corner cooling water supply device. It may include an off-corner cooling water supply device for supplying to the off-corner region.

The cooling water temperature control unit for each location is disposed between the off-corner cooling water supply device and the slab, and is generated by mixing the cooling water of the second set temperature supplied from the off-corner cooling water supply device and the cooling water of the reference temperature. It may include a center part cooling water supply device for supplying the cooling water to the center part area.

A plurality of upper corner injection nozzles and a plurality of lower corner injection nozzles may be disposed between the corner cooling water supply device and the upper and lower portions of the corner region, respectively, for injecting cooling water of a first set temperature to the surface of the corner region. .

Between the off-corner cooling water supply device and the upper and lower portions of the off-corner region, an upper off-corner injection nozzle and a lower off-corner injection nozzle for injecting cooling water of a second set temperature to the surface of the off-corner region are respectively provided. A plurality may be disposed.

Between the center part cooling water supply device and the upper and lower parts of the center part region, a plurality of upper center part injection nozzles and a plurality of lower center part injection nozzles for injecting coolant of a third set temperature to the surface of the center part region may be respectively disposed. have.

The corner cooling water supply device may be connected to the cooling water supply device by a first supply pipe, and a cooling water supply nozzle for spraying cooling water of a reference temperature to the corner cooling water supply device may be installed in the first supply pipe.

The corner cooling water supply device may be connected by an upper corner injection nozzle and an upper corner connection pipe, and may be connected to a lower corner injection nozzle and a lower corner connection pipe.

The off-corner cooling water supply device may be connected by an upper off-corner injection nozzle and an upper off-corner connection pipe, and may be connected by a lower off-corner injection nozzle and a lower off-corner connection pipe.

The center part cooling water supply device may be connected by the upper center part injection nozzle and the upper center part connection pipe, and may be connected by the lower center part injection nozzle and the lower center part connection pipe.

According to the embodiment of the present invention, surface cracks occurring in the slab can be reduced as much as possible by cooling the surface temperature in the width direction of the slab as uniformly as possible in the secondary cooling zone during the continuous casting process of steel.

1 is a schematic configuration diagram of a cooling device for continuous casting according to an embodiment of the present invention.
2 is a partial configuration diagram for explaining the installation state for each slab position of the cooling device for continuous casting according to an embodiment of the present invention.
3 is a graph showing the relationship between the position of the slab cooled by the cooling device for continuous casting according to an embodiment of the present invention and the surface temperature of the slab.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described so that those of ordinary skill in the art can easily carry out the present invention. As can be easily understood by those of ordinary skill in the art to which the present invention pertains, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Wherever possible, identical or similar parts are denoted by the same reference numerals in the drawings.

The terminology used below is for the purpose of referring to specific embodiments only, and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

All terms including technical terms and scientific terms used below have the same meaning as those commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms defined in the dictionary are further interpreted as having a meaning consistent with the related art literature and the presently disclosed content, and unless defined, are not interpreted in an ideal or very formal meaning.

Figure 1 is a schematic configuration diagram of a cooling device for continuous casting according to an embodiment of the present invention, Figure 2 is a part for explaining the installation state for each slab position of the cooling device for continuous casting according to an embodiment of the present invention It is a configuration diagram.

1 and 2 , a cooling apparatus for continuous casting according to an embodiment of the present invention may include a water vapor recovery chamber 100 , a cooling water supply device 20 , and a cooling water temperature controller for each location.

The water vapor recovery chamber 100 is located above the slab 10 passing through the secondary cooling zone during continuous casting of steel, and may recover water vapor generated when the slab 10 is cooled.

In addition, the cooling water supply device 20 may be disposed outside the water vapor recovery chamber 100 , and may supply cooling water of a reference temperature to the slab 10 to cool the slab 10 .

The cooling water temperature control unit for each position is disposed between the slab 10 and the cooling water supply device 20 and recovers heat of the steam supplied from the steam recovery chamber 100 in the width direction of the slab 10 (see FIG. 2 ). The water temperature of the cooling water supplied to the slab 10 can be controlled according to the X direction) position.

Here, the position in the width direction of the slab 10 is, as shown in FIG. 2 , for example, the central area in the width direction (X direction in FIG. 2 ) of the slab 10, the center area (CEA) area, and the width of the slab 10 . The direction corner area may be divided into a corner area (COA) area, and an area between the center area area (CEA) and the corner area area (COA) along the width direction of the slab 10 may be divided into an off corner area (OCA) area.

In addition, as shown in FIG. 2 , the center portion CEA region of the slab 10 in the width direction (X direction in FIG. 2 ) and the central reference line (line O1-O1 in FIG. 2 ) of the slab 10 as shown in FIG. 2 . It may be set to a length L1 in the range of 40 to 60% of the half length of the total width.

As shown in FIG. 2, the off-corner portion (OCA) area is the entire slab 10 in the width direction (X direction in FIG. 2) of the slab 10 based on the central reference line (line O1-O1 in FIG. 2). It may be set to a length L2 in the range of 60 to 80% of the half length of the width.

As shown in FIG. 2, the corner portion COA area is the total width of the slab 10 in the width direction (X direction in FIG. 2) of the slab 10 based on the central reference line (line O1-O1 in FIG. 2) It can be set to a length (L3) in the range of 80 to 100% of the half length of .

A discharge pipe 110 for discharging the steam recovered from the steam recovery chamber 100 is installed at the upper portion of the steam recovery chamber 100, and a discharge pipe control valve for controlling the opening and closing of the discharge pipe 110 is provided on the discharge pipe 110 ( 111) can be installed.

The cooling water temperature control unit for each location is disposed outside the water vapor recovery chamber 100 and supplies cooling water of a first set temperature generated by mixing water vapor supplied from the water vapor recovery chamber 100 and cooling water of a reference temperature to the slab 10 . It may include a corner part cooling water supply device 200 for supplying the corner part (COA) region of the.

In addition, the cooling water temperature control unit for each position is disposed between the corner cooling water supply device 200 and the slab 10 , and the cooling water of the first set temperature and the cooling water of the reference temperature supplied from the corner cooling water supply device 200 . may include an off-corner cooling water supply device 300 for supplying the cooling water of the second set temperature to the off-corner (OCA) region of the slab 10 by mixing.

The cooling water temperature control unit for each position is disposed between the off-corner cooling water supply device 300 and the slab 10 , and the cooling water of the second set temperature and the reference temperature are supplied from the off-corner cooling water supply device 300 . It may include a center part cooling water supply device 400 for supplying the cooling water of the third set temperature generated by mixing the slab 10 to the center part (CEA) region of the slab 10 .

Here, the reference temperature cooling water (hereinafter, also referred to as “reference cooling water”) is a temperature within the range of room temperature, for example, refers to cooling water in a temperature range of 15 to 25° C., and cooling water of a first set temperature (hereinafter, “high temperature”). Cooling water" (also referred to as "cooling water") may refer to, for example, cooling water having a temperature range of 70 to 90°C.

In addition, the cooling water of the second set temperature (hereinafter also referred to as “medium temperature cooling water”) refers to, for example, cooling water having a temperature range of 50 to 70 ° C., the cooling water of the third set temperature (hereinafter also referred to as “low temperature cooling water”) ) may refer to cooling water having a temperature range of 20 to 50°C.

As described above, setting the temperature ranges of the reference cooling water, the high temperature cooling water, the medium temperature cooling water, and the low temperature cooling water is exemplary, and it goes without saying that it can be set in various various ranges as needed.

A corner cooling water supply device 200 is connected to the discharge pipe 110 of the water vapor recovery chamber 100 by a first connection pipe 210 , and the first connection pipe 210 passes through the first connection pipe 210 . A first flow control valve 211 for controlling a flow rate of steam supplied from the steam recovery chamber 100 to the corner cooling water supply device 200 may be installed.

The corner cooling water supply device 200 is connected to the cooling water supply device 20 and the first supply pipe 21 , and the first control valve 22 for opening and closing the first supply pipe 21 may be installed. .

The first supply pipe 21 has a cooling water supply nozzle 23 for spraying the cooling water of the reference temperature to the corner cooling water supply device 200 so that the water vapor supplied from the water vapor recovery chamber 100 and the cooling water of the reference temperature can be mixed well. ) can be installed.

The cooling water supply nozzle 23 may be disposed directly above the corner cooling water supply device 200 so that the water vapor supplied from the water vapor recovery chamber 100 and the cooling water of the reference temperature can be more effectively mixed.

In addition, the off-corner coolant supply device 300 is connected to the coolant supply device 20 and the second supply pipe 31 , and a second control valve 32 for opening and closing the second supply pipe 31 is installed. can be

The center part cooling water supply device 400 is connected to the cooling water supply device 20 and the third supply pipe 41 , and a third control valve 42 for opening and closing the third supply pipe 41 may be installed. .

In addition, it is disposed between the corner cooling water supply device 200 and the upper and lower portions of the corner portion COA region of the slab 10 , and sprays high-temperature coolant on the surface of the corner portion COA region of the slab 10 . It may include an upper corner injection nozzle 201 and a lower corner injection nozzle 201A for

The upper corner part injection nozzle 201 and the lower corner part injection nozzle 201A change the transport direction of the slab 10 (arrow direction in FIG. 1) for easy cooling of the corner part COA region of the slab 10. A plurality may be disposed at intervals set according to the.

The upper corner injection nozzle 201 and the lower corner injection nozzle 201A are of the corner portion COA based on the corner portion COA so as to effectively cool the corner portion COA region of the slab 10 . The upper and lower portions may be disposed to correspond to each other.

The corner cooling water supply device 200 is connected by the upper corner injection nozzle 201 and the upper corner connection pipe 211, and the corner cooling water supply device 200 is connected to the lower corner injection nozzle 201A. and the lower corner part connecting pipe 211A.

The upper corner part control valve 212 for controlling its opening and closing is installed in the upper corner connection pipe 211, and the lower corner part control valve 212A for controlling its opening and closing in the lower corner part connection pipe 211A. can be installed.

In addition, it is disposed between the off-corner cooling water supply device 300 and the upper and lower portions of the off-corner (OCA) region of the slab 10, respectively, and a medium temperature on the surface of the off-corner (OCA) region of the slab 10 It may include an upper off-corner injection nozzle 301 and a lower off-corner injection nozzle 301A for spraying the coolant.

The upper off-corner injection nozzle 301 and the lower off-corner injection nozzle 301A move in the transport direction of the slab 10 (arrow in FIG. 1 ) for easy cooling of the off-corner (OCA) region of the slab 10 . direction) may be disposed at a set interval.

In addition, the upper off-corner injection nozzle 301 and the lower off-corner injection nozzle 301A are based on the off-corner portion OCA so as to effectively cool the off-corner portion OCA region of the slab 10 . The upper and lower portions of the off-corner portion OCA may be disposed to correspond to each other.

The off-corner cooling water supply device 300 is connected to the corner cooling water supply device 200 by a second connection pipe 213 , and the second connection pipe 213 has a second connection pipe control for controlling opening and closing thereof. A valve 214 may be installed.

The off-corner cooling water supply device 300 is connected by the upper off-corner injection nozzle 301 and the upper off-corner connection pipe 311 , and the corner cooling water supply device 200 injects the lower off-corner portion. The nozzle 311A may be connected by a lower off-corner connecting pipe 311A.

In addition, the upper corner part control valve 312 for controlling its opening and closing is installed in the upper off-corner connection pipe 311, and the lower corner part control for controlling its opening and closing in the lower off-corner connection pipe 311A. A valve 312A may be installed.

It is disposed between the center portion cooling water supply device 400 and the upper and lower portions of the center portion (CEA) area of the slab 10, respectively, and for spraying low-temperature coolant on the surface of the center portion (CEA) area of the slab 10 It may include an upper center portion injection nozzle 401 and a lower center portion injection nozzle (401A).

In addition, the upper center part injection nozzle 401 and the lower center part injection nozzle 401A are the center part CEA based on the center part CEA so as to effectively cool the center part CEA area of the slab 10 . ) may be disposed on the upper and lower portions to correspond to each other.

In addition, the upper center part injection nozzle 401 and the lower center part injection nozzle 401A move in the transport direction of the slab 10 (arrow direction in FIG. 1 ) for easy cooling of the center part CEA region of the slab 10 . ) may be arranged at a set interval along the plurality.

The center part cooling water supply device 400 is connected by the upper center part injection nozzle 401 and the upper center part connection pipe 411, and also, the lower center part injection nozzle 401A and the lower center part connection pipe 411A. can be connected by

The upper center part control valve 412 for controlling its opening and closing is installed in the upper center part connection pipe 411, and the lower center part control valve 412A for controlling its opening and closing in the lower center part connection pipe 411A. can be installed.

In addition, the center part coolant supply device 400 is connected to the off-corner part coolant supply device 300 by a third connection pipe 313 , and the third connection pipe 313 has a third connection for controlling opening and closing thereof. A tube control valve 314 may be installed.

In addition, an upper support 30 for supporting the upper corner injection nozzle 201 , the upper off-corner injection nozzle 301 , and the upper center injection nozzle 401 may be installed on the upper portion of the slab 10 . have.

A lower support 30A for supporting the lower corner injection nozzle 201A, the lower off-corner injection nozzle 301A, and the lower center injection nozzle 401A may be installed at the lower portion of the slab 10 .

Hereinafter, the operation of the cooling device for continuous casting according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 .

During continuous casting of steel, the molten metal stored in the tundish 11 passes through the mold 13 and is cooled in the primary cooling zone to manufacture the slab 10 having a set width.

The slab 10 manufactured in this way passes through the secondary cooling zone while passing through the plurality of rolls 15 .

At this time, the cooling water temperature control device for each location is Control the water temperature of the coolant supplied to the corner portion COA, the off-corner portion OCA, and the center portion CEA region of the slab 10 according to the position of the slab 10 in the width direction (X direction in FIG. 2 ) do.

That is, the water vapor recovery chamber 100 is located on the upper portion of the slab 10 passing through the secondary cooling zone during continuous casting of steel, and collects and recovers water vapor generated and raised when the slab 10 is cooled.

As described above, the water vapor recovered in the water vapor recovery chamber 100 is supplied to the corner cooling water supply device 200 through the discharge pipe 110 and the first connection pipe 210 , and the first supply pipe 21 and the cooling water supply nozzle It is mixed with the cooling water of the reference temperature supplied to the corner cooling water supply device 200 through 201 .

At this time, in the corner cooling water supply device 200 , the cooling water of the reference temperature recovers the heat of the water vapor to increase the water temperature of the cooling water to the first set temperature.

The coolant whose water temperature has been raised to the first set temperature is supplied to the upper corner part injection nozzle 201 and the lower corner part injection nozzle 201A through the upper corner part connection pipe 211 and the lower corner part connection pipe 211A, respectively. is supplied

Then, the upper corner injection nozzle 201 and the lower corner injection nozzle 201A are respectively sprayed on the surface of the corner portion COA region of the slab 10 to cool the corner portion COA region.

In addition, the cooling water at the first set temperature supplied from the corner cooling water supply device 200 to the off-corner cooling water supply device 300 through the second connection pipe 213 is supplied to the off-corner coolant supply device 300 through the second supply pipe 31 . It is mixed with the cooling water of the reference temperature supplied to the auxiliary cooling water supply device 300 .

At this time, in the off-corner cooling water supply device 300 , the cooling water of the reference temperature is mixed with the cooling water of the first set temperature, and the water temperature of the cooling water is generated as a second set temperature higher than the reference temperature and lower than the first set temperature.

The cooling water of the second set temperature of the off-corner cooling water supply device 300 is supplied to the upper off-corner injection nozzle 301 and the upper part through the upper off-corner connecting pipe 311 and the lower off-corner connecting pipe 311A. They are respectively supplied to the off-corner connection pipe 311 .

Then, the upper off-corner injection nozzle 301 and the upper off-corner connection pipe 311 are sprayed on the surface of the off-corner (OCA) area of the slab 10 to cool the off-corner (OCA) area. do.

In addition, the cooling water of the second set temperature supplied from the off-corner cooling water supply device 300 to the center part cooling water supply device 400 through the third connection pipe 313 is supplied to the center part through the third supply pipe 41 . It is mixed with the cooling water of the reference temperature supplied to the cooling water supply device 400 .

At this time, in the center part cooling water supply device 400 , the cooling water of the reference temperature is mixed with the cooling water of the second set temperature, and the water temperature of the cooling water is generated as a third set temperature higher than the reference temperature and lower than the second set temperature.

The cooling water of the third set temperature of the center part cooling water supply device 400 is supplied through the upper center part connecting pipe 411 and the lower center part connecting pipe 411A through the upper center part injection nozzle 401 and the lower center part injection nozzle. 401A, respectively.

Then, the upper center portion injection nozzle 401 and the lower center portion injection nozzle 401A are sprayed on the surface of the center portion CEA area of the slab 10, respectively, to cool the center portion CEA area.

As such, by the corner cooling water supply device 200 , the off-corner cooling water supply device 300 , and the center cooling water supply device 400 , the slab 10 is positioned in the width direction (X direction in FIG. 2 ). Accordingly, the temperature of the coolant supplied to the corner portion COA, the off-corner portion OCA, and the center portion CEA of the slab 10 may be controlled to different temperatures.

That is, the corner portion (COA) region of the slab 10 has a reference temperature, the second set temperature of the off-corner portion (OCA) region, and the first set temperature of a temperature higher than the third set temperature of the center part (CEA) region. Cooling water is supplied.

In addition, cooling water of a third set temperature higher than the reference temperature and lower than the first set temperature of the corner part COA area and the second set temperature of the off-corner part OCA area is supplied to the center part CEA area.

Cooling water having a reference temperature and a second set temperature higher than the third set temperature of the center part CEA area and lower than the first set temperature of the corner part COA area is supplied to the off-corner area OCA.

Accordingly, the cooling water of the first set temperature, the cooling water of the second set temperature, and the cooling water of the third set temperature, respectively, in the center portion (CEA) area, the off-corner area (OCA) area, and the center portion (CEA) area, respectively By being supplied, the surface temperature at the corner portion COA, the off-corner portion OCA, and the center portion CEA of the slab 10 may be controlled substantially uniformly.

That is, by supplying cooling water having a temperature higher than the water temperature of the coolant in the off-corner OCA and the center portion CEA to the corner portion COA, the heat transfer rate is slower than that of the off-corner portion OCA and the center portion CEA. do.

In addition, cooling water having a higher temperature than the water temperature of the coolant in the center portion CEA is supplied to the off-corner portion OCA to slow the heat transfer rate compared to the center portion CEA.

Accordingly, since the stress due to supercooling is reduced on the surface of the slab 10 , it is possible to reduce surface cracks of the slab 10 .

(Example)

In order to confirm the performance of the present invention, the surface temperature of the slab 10 was calculated using a computational analysis technique.

[Table 1] expresses the boundary conditions used to calculate the surface temperature of the slab, and it was calculated by dividing it into three conditions.

The comparative example is a case in which the entire width of the slab is cooled by a general (room temperature) cooling method, and is shown by a dashed-dotted line in FIG. 3 .

In Example 1, the center part and the off-corner part of the slab were cooled by a normal (room temperature) cooling method, and the corner part was cooled with high-temperature cooling water, as shown in FIG. 3 by a dotted line.

In Example 2, the center portion of the slab is cooled by a normal (room temperature) cooling method, and the off-corner and corner portions of the slab are cooled with high-temperature cooling water, as shown by a solid line in FIG. 3 .

[Table 1] Cooling method and cooling water temperature by location in the slab width direction

[Table 1] compares the case of cooling under the conditions of Comparative Example, Example 1, and Example 2. As shown in [Table 1], the inlet temperature used in the calculation is the cooling water of the general (room temperature) cooling method of the comparative example. The temperature was set to 25 °C, which is an average temperature of 20 to 30 °C.

Moreover, the temperature of the cooling water of the center part of Example 1 was 25 degreeC, the temperature of the cooling water of an off-corner part was 25 degreeC, and the temperature of the cooling water of a corner part was 80 degreeC.

And, the temperature of the cooling water of the center part and the off-corner part of Example 2 was 50 degreeC, and the temperature of the cooling water of a corner part was 80 degreeC.

Assuming that the coolant flow rate at the center portion is 1, the off-corner portion and the corner portion were set to 1/3 of the coolant flow rate at the center portion. In the calculation, the surface temperature of the slab was assumed to be 1300 °C.

The calculation was performed using a computational analysis technique, and the calculation result of the surface temperature of the slab is shown in FIG. 3 .

In the comparative example, the surface temperature of the center part is 783 ° C., the surface temperature of the corner part is 595 ° C., in Example 1, the surface temperature of the center part is 783 ° C., the surface temperature of the corner part is 843 ° C., and in Example 2, the surface temperature of the center part. The temperature is 825℃, and the surface temperature of the corner is 850℃.

That is, in the case of Example 1 among Comparative Examples, Examples 1 and 2, the difference between the surface temperature of the center part and the surface temperature of the corner part was smaller than that of the Comparative Example, and in Example 2, the surface temperature of the center part It was confirmed that the difference in surface temperature between and at the corners was minimal, and the surface temperatures of the center and corners were generally uniform.

Although the present disclosure has been described through preferred embodiments as described above, the present invention is not limited thereto, and various modifications and variations are possible without departing from the scope of the claims set forth below. Those in the field will understand easily.

10: slab
20: coolant supply
100: water vapor recovery chamber
200: corner cooling water supply device
300: off-corner coolant supply device
400: center part cooling water supply device
COA: Corner
OCA: off corner
CEA: Center Department

Claims (11)

A water vapor recovery chamber located above the slab passing through the cooling zone during continuous casting of steel and for recovering water vapor generated during cooling of the slab;
a cooling water supply device disposed outside the water vapor recovery chamber and configured to supply cooling water of a reference temperature to the slab; and
Cooling water temperature control unit for each location for recovering heat of water vapor supplied from the water vapor recovery chamber and controlling the water temperature of the cooling water supplied to the corner, off-corner, and center areas of the slab according to the position in the width direction of the slab
A cooling device for continuous casting comprising a. According to claim 1,
The cooling water temperature control unit for each location,
and a corner cooling water supply device disposed outside the water vapor recovery chamber and configured to supply cooling water of a first set temperature generated by mixing water vapor supplied from the water vapor recovery chamber and cooling water of a reference temperature to the corner area; A cooling device for continuous casting. 3. The method of claim 2,
The cooling water temperature control unit for each location,
It is disposed between the corner cooling water supply device and the slab, and the cooling water of a second set temperature generated by mixing the cooling water of the first set temperature supplied from the corner cooling water supply device and the cooling water of the reference temperature is supplied to the off-corner part A cooling device for continuous casting comprising an off-corner cooling water supply device for supplying to the region. 4. The method of claim 3,
The cooling water temperature control unit for each location,
It is disposed between the off-corner cooling water supply device and the slab, and the cooling water of a third set temperature generated by mixing the cooling water of the second set temperature supplied from the off-corner cooling water supply device and the cooling water of the reference temperature is transferred to the center. A cooling device for continuous casting including a center part cooling water supply device for supplying to the sub-region. 3. The method of claim 2,
A plurality of upper corner injection nozzles and a plurality of lower corner injection nozzles are disposed between the corner cooling water supply device and the upper and lower corners of the corner area, respectively, for spraying cooling water of a first set temperature to the surface of the corner area. A cooling device for continuous casting. 4. The method of claim 3,
Between the off-corner cooling water supply device and the upper and lower portions of the off-corner region, an upper off-corner injection nozzle and a lower off-corner injection nozzle for injecting cooling water of a second set temperature to the surface of the off-corner region A cooling device for continuous casting in which a plurality of nozzles are respectively disposed. 5. The method of claim 4,
A plurality of upper center part injection nozzles and a plurality of lower center part injection nozzles are disposed between the center part cooling water supply device and the upper and lower parts of the center part area, respectively, for spraying coolant of a third set temperature to the surface of the center part area A cooling device for continuous casting. 3. The method of claim 2,
The corner cooling water supply device is connected to the cooling water supply device by a first supply pipe,
A cooling device for continuous casting in which a cooling water supply nozzle for spraying cooling water of a reference temperature to the corner cooling water supply device is installed in the first supply pipe. 6. The method of claim 5,
The corner cooling water supply device is a cooling device for continuous casting that is connected to the upper corner injection nozzle and the upper corner connection pipe, and is connected to the lower corner injection nozzle and the lower corner connection pipe. 7. The method of claim 6,
The off-corner cooling water supply device is connected to the upper off-corner injection nozzle and the upper off-corner connection pipe, and the cooling for continuous casting is connected to the lower off-corner injection nozzle and the lower off-corner connection pipe. Device. 8. The method of claim 7,
The center part cooling water supply device is connected to the upper center part injection nozzle and the upper center part connection pipe, and is connected to the lower center part injection nozzle and the lower center part connection pipe by the cooling device for continuous casting.

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