KR101790003B1 - Temperature detecting apparatus, casting apparatus and casting method of using it - Google Patents

Abstract

A temperature measuring apparatus, a casting apparatus having the same, and a casting method using the same according to an embodiment of the present invention may include a temperature measuring unit disposed on a traveling path of a casting and spaced from a surface of the casting to measure a temperature of the casting; And a guide part provided between the temperature measuring part and the moving path of the casting machine, so that the temperature in the width direction of the casting can be efficiently measured in real time during casting, thereby increasing the productivity and efficiency of the casting process.

Description

TECHNICAL FIELD The present invention relates to a temperature measuring apparatus, a casting apparatus equipped with the same, and a casting method.

The present invention relates to a temperature measuring apparatus, a casting apparatus having the same, and a casting method using the same. More particularly, the present invention relates to a temperature measuring apparatus capable of measuring the temperature of a casting sheet, a casting apparatus having the same, .

Generally, a continuous casting machine (hereafter referred to as a continuous casting machine) is a machine in which a molten steel produced in a steelmaking furnace is accommodated in a ladle, a certain amount is supplied to a tundish, molten steel accommodated in the tundish is supplied to a mold It is a continuous production line with a constant size of cast steel.

Continuous casting (continuous casting) is a process in which semi-solidified cast products are continuously drawn into the lower side of a mold through such a casting machine to produce semi-finished products having various shapes such as slab, bloom, billet, process can be performed.

During the continuous casting process, a large amount of cooling water is injected into the casting from the casting mold in order to coagulate and cool the casting formed in the casting mold. The temperature of the casting product cooled by the cooling water finally determines the quality of the casting produced. That is, in the continuous casting process, the temperature of the cast steel greatly affects the cracks formed on the surface of the cast steel and the center segregation formed therein. Therefore, it is necessary to control the casting temperature efficiently in real time by measuring the casting temperature in the casting process.

Conventionally, when measuring the temperature of the cast steel during casting, a temperature measuring device for measuring the temperature of the cast steel was installed in the feed path of the cast steel, and the temperature of the cast steel was measured by bringing the temperature measuring device into contact with the cast steel. In order to measure the temperature in the width direction of the cast steel, a guide for installing the temperature measuring device is installed in the width direction of the cast steel, and a temperature measuring device The temperature of the casting was measured while moving. In the case of measuring the temperature of the cast steel in this manner, it is impossible to perform simultaneous measurement in a straight line because the temperature measuring device measures the temperature in the width direction of the cast steel in a zigzag manner. In this case, a plurality of temperature measuring devices are installed in the width direction of the cast steel to measure the temperature of the casting. However, as the number of the temperature measuring devices increases, the installation cost increases. . Further, since the space where the temperature measuring device and the temperature measuring device are installed is narrow and the space where the temperature measuring device is installed is high temperature and high humidity, there is a problem that interference or collision occurs at the time of segment replacement,

KR0642780B KR2002-0014589A

The present invention provides a temperature measuring apparatus capable of efficiently measuring the temperature in the width direction of a casting during casting, a casting apparatus equipped with the same, and a casting method using the same.

The present invention provides a temperature measuring apparatus capable of improving safety and productivity of a casting operation, a casting apparatus having the same, and a casting method using the same.

A temperature measuring apparatus according to an embodiment of the present invention includes: a temperature measuring unit disposed on a traveling path of a cast steel and spaced apart from a surface of the cast steel to measure a temperature of the cast steel; And a guide portion provided between the temperature measuring portion and the movement path of the casting.

Wherein the temperature measuring unit comprises: a temperature measuring unit for measuring and imaging the temperature in the width direction of the casting; And a housing covering at least a part of the temperature measuring device.

The temperature measuring device may include a thermal imaging camera.

The housing may include an inner passage surrounding the temperature measuring device and opening at a lower portion thereof, and an outer tube surrounding the inner tube, and a passage through which the cooling medium moves may be disposed between the inner passage and the outer tube.

The housing may include a first nozzle for injecting air into the inner cylinder.

Wherein the guide portion includes a hood disposed in a direction intersecting with the feeding path of the cast steel, both sides and lower portions of which open to define a temperature measurement range of the cast steel by the temperature measuring portion along the width direction of the cast steel, And a second nozzle for spraying air into the hood.

The second nozzle may include amplifying means for amplifying air.

And a jetting portion disposed in parallel with the hood and jetting air along a width direction of the casting on an upper portion of the casting, and the jetting portion may be provided behind the hood with respect to the feeding direction of the casting.

The injection unit may include a pipe for forming an inlet through which air is introduced, and a third nozzle connected to the pipe for spraying air onto the surface of the casting.

The injection unit may be movable up and down.

The jetting unit can adjust the jetting angle of the air.

And a blower provided at one side of the hood to form a flow of air in the width direction of the casting in the hood.

A casting apparatus according to an embodiment of the present invention may include a temperature measuring apparatus provided on a moving path of a casting that is pulled out from a casting mold and having the above-described characteristics.

A casting method according to an embodiment of the present invention includes: a step of drawing a cast cast in a mold; And measuring the temperature of the casting in a non-contact manner at the top of the casting, and removing the cooling water from the surface of the casting before measuring the temperature of the casting.

The step of measuring the temperature of the cast steel may comprise the steps of defining a temperature measurement range using a hood provided along the width direction of the cast steel at the upper part of the feed path of the cast steel, The temperature in the width direction of the cast steel can be measured and imaged in a temperature measurement range defined by the hood.

The temperature measuring device may be cooled during the measurement of the temperature of the casting.

The process of removing the cooling water from the surface of the cast steel may inject air to the upper part of the cast steel through the casting part provided along the width direction of the cast steel behind the hood with respect to the casting direction of the cast steel.

In the process of measuring the temperature of the cast steel, the steam may be removed by forming a flow of air along the width direction of the cast steel in the hood.

The height of the injection part can be adjusted according to the thickness of the casting.

According to the temperature measuring apparatus, the casting apparatus having the same, and the casting method according to the embodiment of the present invention, the temperature in the width direction of the casting can be efficiently measured in real time during casting. That is, it is possible to easily measure the temperature distribution in the width direction of the cast steel by using the thermal imaging camera provided above the conveying path of the casting. Therefore, compared with the conventional temperature measuring method for measuring the width direction temperature of the casting while moving one temperature measuring device along the width direction of the casting or measuring the width direction temperature of the casting using a plurality of temperature measuring devices, Can be easily measured.

In addition, when the temperature of the cast steel is measured, the influence of the external environment is minimized, so that the error of the result of measuring the width direction of the cast steel can be reduced to more accurately measure the temperature distribution in the width direction of the cast steel.

By using the result of the widthwise temperature of the cast steel measured in this manner, it is possible to change the casting condition or to predict the quality of the casting casting, thereby suppressing the deterioration of the casting quality and stabilizing the operation.

In addition, the temperature of the casting can be efficiently measured in a variety of equipment where the temperature measurement of the casting is required.

1 shows a casting installation according to an embodiment of the invention;
2 is a perspective view of the temperature measuring apparatus shown in Fig.
3 is a front view of the temperature measuring device shown in Fig.
4 is a sectional view of the temperature measuring apparatus shown in Fig.
FIG. 5 and FIG. 6 conceptually show a state in which the temperature of the cast steel is measured using a temperature measuring device. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and it is to be understood that these embodiments are merely illustrative of the principles of the invention and are not intended to limit the scope of the invention to those skilled in the art. It is provided to let you know completely.

1 is a perspective view of the temperature measuring apparatus shown in FIG. 1, FIG. 3 is a front view of the temperature measuring apparatus shown in FIG. 1, and FIG. 4 is a cross- 1 is a cross-sectional view of the temperature measuring apparatus shown in Fig. 1. Fig.

The temperature measuring device, the casting equipment and the casting method including the same according to the embodiment of the present invention can measure the width and the temperature in the thickness direction of the cast steel S during the casting of the cast steel S into the cast steel S have. By measuring the temperature in the width direction of the cast steel S measured in this way, the correlation between defects such as cracks occurring in the cast steel and the temperature distribution in the width direction of the cast steel can be identified, And the like.

The casting installation 1 according to the embodiment of the present invention includes a temperature measuring device 100 provided in a feeding path of a casting cut out from the casting 30 to measure the temperature of the casting, . The temperature measuring apparatus 100 includes a temperature measuring unit 130 disposed on a feeding path of the cast steel and spaced apart from the surface of the cast steel to measure the temperature of the cast steel, A guide unit 110 for defining or setting a temperature measurement range by the measurement unit 130 and a control unit 150 for controlling the operation of the temperature measurement unit 130 and the guide unit 110. Here, it is described that the temperature measuring apparatus 100 is provided on the feeding path of the casting sheet to be pulled out from the casting mold, but it goes without saying that the present invention is also applicable to other casting facilities as well as other facilities requiring temperature measurement of the casting casting.

The temperature measuring apparatus 100 may be installed in a conveyance path through which the cast steel S withdrawn from the casting mold 30 is conveyed as indicated by "A" in FIG. 1, May be installed after the bending area to be changed. The temperature measuring apparatus 100 may be provided between the cooling water spraying unit 50 for spraying the cooling water to the slab S in the feeding path of the cast steel or between the segment roll 40 and the segment roll 40.

The temperature measuring unit 130 may include a temperature measuring unit 131 capable of measuring the temperature of the casting sheet in a noncontact manner and a housing 132 covering at least a part of the temperature measuring unit 131. [

The temperature measuring device 131 may include various measuring devices capable of measuring the temperature of the casting product in a non-contact manner. In an embodiment of the present invention, a thermal imaging camera for measuring and imaging the casting temperature may be used. The temperature measuring device 131 may be provided on the upper part of the feeding path of the casting machine. Since the thermal imaging camera used as the temperature measuring device 131 in the embodiment of the present invention can measure the temperature in a certain region of a predetermined area unlike the conventional temperature measuring device for measuring the temperature at a specific point, The temperature in the width direction of the cast steel can be easily measured by using a camera. Such a thermal imaging camera can measure the temperature in the width direction of the casting in real time on the conveying path of the casting, and image the casting state of the casting casting without performing additional image processing.

On the other hand, since the temperature measuring device 131 is provided on the upper part of the path where the high temperature main part is fed, it can be exposed to a high temperature environment. Therefore, the temperature measuring device 131 can be provided inside the housing 132 which can protect the temperature measuring device 131 from a high temperature environment. The housing 132 may be provided to cover at least a part of the temperature measuring device 131, that is, to cover the rest except for the measuring direction for measuring the temperature of the casting. The housing 132 surrounds the temperature measuring device 131. The housing 132 has an inner cylinder 132a in which the lower portion is opened and an outer cylinder 132b surrounding the inner cylinder 132a in a direction for measuring the temperature of the casting in the temperature measuring device 131 . The inner cylinder 132a and the outer cylinder 132b are connected to each other to form a space therein. The space may be provided with a flow path 136 used as a path for moving the cooling medium such as cooling water or cooling gas. The inlet 136 and the outlet 136 are connected to the cooling medium circulation pipe 138 to circulate the cooling medium through the flow path 136. The cooling medium circulation pipe 138 is connected to the inlet 136 and the outlet 136, . With this configuration, the cooling medium is circulated inside the housing 132, thereby preventing or preventing the temperature measuring device 131 provided in the housing 132 from being overheated by the hot cast steel.

In addition, the housing 132 may be provided with a first nozzle 134 through which air is injected. The air is supplied to the inside of the housing 132, that is, the inner cylinder 132a through the first nozzle 134, so that the heat of the main body can be prevented or prevented from flowing into the housing 132. The first nozzle 134 injects a gas supplied to the gas supply pipe 127, for example, air into the housing 132 at a high pressure to measure the temperature of the casting through the temperature measuring device 131, It is possible to perform temperature measurement more precisely by removing heat and water vapor existing in the inside of the heat exchanger 132.

The guide unit 110 is provided between the temperature measuring unit 130 and the traveling path of the casting sheet to define a temperature measuring range in the casting by the temperature measuring unit 131.

The guide portion 110 may include a hood 112 disposed in a direction intersecting the feeding path of the main body and having both side surfaces and a lower portion opened. The hood 112 may be arranged in the direction intersecting the feeding path of the casting, that is, in the width direction of the casting, and may be formed to have a length equal to or shorter than the width of the casting. In addition, the hood 112 may be provided at a predetermined distance from the surface of the cast steel to suppress collision with the cast steel. With this structure, the hood 112 is disposed in the shape of '∩' along the width direction of the cast steel at the upper part of the feeding path of the cast steel, and can cover a part of the cast steel in the longitudinal direction through the internal space. The guide part 110 may be fixed to the upper part of the feeding path of the main body, but it may be provided with a separate driving unit (not shown) so as to be movable in the vertical direction according to the thickness of the casting have.

In addition, at least one second nozzle 114 may be provided in the hood 112 in the width direction of the casting. The second nozzle 114 can prevent or prevent the inflow of water vapor into the hood 112 by injecting gas supplied from the gas supply pipe 127, for example, air into the hood 112. At this time, the second nozzle 114 may include amplification means to increase the amount of air injected into the hood 112. The amplifying means can amplify the compressed air by drawing a large amount of the air around the amplifying means by using the coanda effect that flows in close contact with the surface when the fluid flows into the amplifying means when a small amount of compressed air flows into the amplifying means . Accordingly, the flow of air from the upper part to the lower part is formed inside the hood 112, so that the water vapor generated by evaporating the cooling water on the surface of the slab can be prevented from flowing into the temperature measuring device 131 side.

The temperature measuring unit 130 may be installed on the guide unit 110 such as the hood 112 to support the temperature measuring unit 130. The housing 132 constituting the temperature measuring unit 130 may be provided through the hood 112 at an upper portion of the hood 112. A lower portion of the housing 132 opened to the inside can be disposed inside the hood 112, and an upper portion can be disposed outside the hood 112. A temperature meter 131 is provided inside the housing 132. The temperature meter 131 measures the temperature in the strip width direction in a region defined by the hood 112 through the lower portion of the opened housing 132 can do. At this time, the area defined by the hood 112 may correspond to the length of the space formed inside the hood 112, that is, by 'X' in the longitudinal direction of the cast steel and the width of the cast steel in the width direction.

When measuring the temperature in the width direction of the cast steel by using the temperature measuring device 131, water vapor generated when cooling water injected into the cast steel to cool the cast steel comes into contact with the high temperature cast steel may adversely affect the temperature measurement result. Accordingly, in the present invention, the sprayer 120 may be provided to remove the cooling water remaining on the surface of the cast steel prior to measuring the temperature of the cast steel using the temperature meter 131.

The jetting section 120 may be provided on the guide section 110 and may be provided on the rear side of the hood 112 with respect to the feeding direction of the casting jig to remove the cooling water remaining on the surface of the casting .

The jetting section 120 may include a pipe 124 connected to the gas supply pipe 127 and a third nozzle 126 connected to the pipe 124 to inject air into the pipe. In addition, the piping 124 may be connected by a support plate 122 at one side of the hood 112. The pipe 124 may be disposed along the width direction of the casting and the third nozzle 126 may be connected to the pipe 124 so as to inject air into the casting piece through the pipe 124. The third nozzle 126 may be provided so as to inject air at an angle to the billet, and each of the third nozzles 126 may be provided to adjust the direction of air injection. At this time, the third nozzle 126 may be jetted so that the air is slightly rearward with respect to the feeding direction of the casting. The third nozzle 126 provided at the central portion with respect to the width direction of the casting can spray air in a direction parallel to the feeding direction of the casting, and the third nozzle 126 provided at both edges of the casting Air can be injected toward the outer side of the cast steel, for example, toward the edge side.

The third nozzle 126 can prevent the cooling water from flowing into the hood 112 in the process of removing the cooling water remaining on the surface of the slab.

Referring to FIG. 4, the jetting unit 120 may be provided to adjust the height corresponding to the thickness change of the casting mold. The sprayer 120 may include a height adjusting unit to allow the third nozzle 126 and the pipe 124 to move up and down on the hood 112.

The height adjusting means may include a connecting member 128 which is connected to the supporting plate 122 and movably connects the pipe 124 to the hood 112 and a driver 129 which is connected to the connecting member 128 have. At this time, the height adjusting means may be various means capable of linearly moving the pipe 124 in the vertical direction. For example, the connecting member 128 may be a rod in which a screw is formed on the outer peripheral surface, and the actuator 129 may be a motor for rotating the rod. At this time, the rod on which the screw is formed on the outer circumferential surface may be a trapezoidal screw. Alternatively, the connecting member 128 may be a rack gear, and the driver 129 may be a motor for driving the rack gear.

According to such a configuration, the jetting unit 120 can efficiently remove the cooling water remaining on the billet by injecting air into the billet by adjusting the height according to the thickness change of the cast billet.

In addition, the temperature measuring apparatus 100 may include a blower 140. The blower 140 may be installed at one side of the hood 112 to form a flow of air inside the hood 112. The blower 140 forms an air flow from one side of the hood 112 to the other side, that is, in the width direction of the casting, so as to remove water vapor generated by the cooling water not removed by the jetting unit 120.

Hereinafter, a casting method using a casting facility according to an embodiment of the present invention will be described with reference to the above-mentioned drawings.

5 and 6 are diagrams conceptually showing a state in which the temperature of the cast steel is measured using a temperature measuring device.

A casting method according to an embodiment of the present invention includes the steps of setting a temperature measurement area along a width direction of a casting on a feeding path of a casting, casting the casting, And a step of removing the cooling water remaining in the casting before the step of measuring the temperature of the casting.

First, when the ladle 10 containing the molten steel M having passed the converter refining and secondary refining facilities is transferred to the casting facility 1, molten steel is supplied from the ladle 10 to the tundish 20, And molten steel M is supplied from the tundish 20 to the mold 30 to start casting. At this time, in the casting, the molten steel M is primarily cooled in the mold 30 to form the main piece, and the main piece is drawn down to the lower portion of the mold 30 and moved along the movement path formed by the plurality of segment rolls 40 While being pressed down by the segment roll 40, the casting proceeds.

As described above, the height of the jetting part 120 provided in the temperature measuring area can be adjusted according to the target thickness of the casting prior to casting the casting. The height of the jetting section 120 means the distance between the surface of the casting mold and the third nozzle 126. The height of the jetting section 120 is controlled by controlling the connecting member 128 according to the target thickness of the casting, Can be moved in the vertical direction so that the distance between the surface of the slab and the third nozzle 126 can be adjusted to effectively remove the cooling water remaining on the slab surface.

The cast steel is transported along the secondary section of the horizontal section by changing the conveying direction in the bending section through the vertical section immediately below the mold (30). Here, the temperature measurement area can be set in the horizontal section immediately after the bending section. In the horizontal section immediately after the bending section, the billet has a temperature of about 750 to 900 ° C, and the zone having this temperature is called the bombardment section. In this section, the probability of cracking on the surface of the cast steel increases. Therefore, in this section, the temperature of the cast steel, that is, the width direction temperature of the cast steel can be measured in real time and data can be converted to compare the cast steel casting surface defects with the width direction temperature of cast steel, .

When the main body pulled out from the mold is folded in the horizontal section in the process of being transported along the transporting path and reaches the temperature measuring area, high pressure air is supplied from the jetting section 120 provided at the rear of the hood 112, And sprayed onto the surface of the cast steel. In order to cool the cast steel, the cooling water injected into the cast steel can be removed by the high-pressure air injected into the casting from the jetting unit 120. Referring to FIG. 5, the jetting unit 120 injects air toward the rear side in the feeding direction of the cast steel. In the center portion of the cast steel in the direction parallel to the casting direction of the cast steel, So that it is sprayed on both side edges, that is, outside.

The cast steel from which the cooling water remaining on the surface is removed by the jetting section 120 enters the temperature measuring area and the temperature in the width direction of the casting is measured by the temperature measuring device 131 installed in the temperature measuring area. At this time, the cooling medium is supplied to the housing 132 surrounding the temperature measuring device 131, and it is possible to prevent the temperature measuring device 131 from being overheated by the heat generated from the casting. In addition, air may be supplied from the outside to the inside of the housing 132 to prevent the water vapor generated by the evaporation of the cooling water on the surface of the slurry, from flowing into the temperature measuring device 131.

6, high pressure air is introduced into the hood 112 through the first nozzle 134 provided on the upper side of the hood 112, and the inflow air is removed by the jetting unit 120 It is possible to prevent the water vapor generated by the cooling water that is not introduced into the hood 112 from flowing into the hood 112.

At the same time, the blower 140 installed at one side of the conveyance path forms a flow of air in the width direction of the casting in the hood 112 to discharge the steam generated at the casting surface to the outside of the hood 112. Accordingly, it is possible to prevent the water vapor generated on the surface of the cast steel from moving upward from the inside of the hood 112 to the side of the temperature measuring device 131.

The temperature measuring unit 131 may measure the temperature in the width direction of the casting and transmit the measured result to the controller 150 connected to the temperature measuring unit 131. The measurement result transmitted to the controller 150 may be stored in the controller 150 or may be displayed on the display through the control of the controller 150. [

Since the measured temperature is imaged and transmitted to the controller 150, the measured temperature may be stored or displayed as it is. However, the temperature may be processed by using a separate temperature calculation logic and stored or displayed on a display You may. For example, the temperature measurement area set by the hood 112 may be divided into a plurality of sections in the width direction of the cast steel, and the temperature in each divided section may be calculated as an average value and stored as a section temperature or displayed on the display.

As described above, it is possible to judge whether surface defects of the cast steel have occurred or to utilize the result of the measurement of the temperature in the width direction of the cast steel while the cast steel S is being cast, or to use as a subsequent process processing guide. In addition, it is used as a basis for judging whether or not the cooling water spraying part 50 for spraying the cooling water to cool the cast steel during casting is blocked, and the operating conditions can be changed in real time according to the determination result.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the following claims.

M: molten steel S: cast steel
10: Ladle 20: Tundish
30: mold 40: segment roll
100: Temperature measuring device 110: Guide part
120: jetting part 130: temperature measuring part
140: blower 150:

Claims (19)

A temperature measuring unit disposed on a traveling path of the casting and spaced apart from the surface of the casting to measure the temperature of the casting;
Wherein the temperature measuring unit is disposed between the temperature measuring unit and the moving path of the casting and is arranged in a direction crossing the feeding path of the casting, A guide portion including a hood defining a temperature measurement range of the casting; And
And a jetting portion disposed in parallel with the hood and jetting air along a width direction of the casting in an upper portion of the casting,
Wherein the jetting unit is provided behind the hood with respect to the feeding direction of the casting to remove the cooling water remaining on the surface of the casting before measuring the temperature of the casting. The method according to claim 1,
The temperature measuring unit includes:
A temperature measuring unit for measuring and imaging the temperature in the width direction of the casting; And
And a housing covering at least a part of the temperature measuring device. The method of claim 2,
Wherein the temperature measuring device includes a thermal imaging camera. The method of claim 3,
The housing includes:
An inner passage through which the lower portion of the temperature meter is opened,
And an outer cylinder surrounding the inner cylinder,
And a flow passage through which the cooling medium moves between the inner passage and the outer casing. The method of claim 4,
The housing includes:
And a first nozzle for injecting air into the inner cylinder. The method of claim 5,
The guide portion
And a second nozzle for spraying air into the hood. The method of claim 6,
And the second nozzle includes amplification means for amplifying air. delete The method of claim 7,
Wherein the injection unit comprises a pipe for forming an inlet through which air is introduced,
And a third nozzle connected to the pipe and injecting air onto a surface of the casting. The method of claim 9,
Wherein the injection unit is movable in the vertical direction. The method of claim 10,
Wherein the spraying unit is capable of adjusting an angle of spraying air. The method of claim 11,
And a blower provided at one side of the hood to form a flow of air in the width direction of the casting in the hood. A casting installation comprising a temperature measuring device according to any one of claims 1 to 7 and 9 to 12, provided on a traveling path of casting from a mold. A process of drawing the casting cast in the mold;
A temperature measurement range is defined by using a hood provided along the width direction of the casting at an upper part of the feeding path of the cast steel, and a temperature measurement range defined by the hood is defined by using a temperature measuring instrument provided on the hood And measuring the temperature of the casting for measuring the width direction temperature of the casting in a non-contact manner and imaging the casting,
Wherein the cooling water remaining on the surface of the cast steel is removed before the process of measuring the temperature of the cast steel through an injection part provided along the width direction of the cast steel at the rear of the hood with respect to the feeding direction of the cast steel, A method of casting comprising the step of spraying air. delete 15. The method of claim 14,
And cooling the temperature measuring instrument in the process of measuring the temperature of the casting. delete 18. The method of claim 16,
In the process of measuring the temperature of the cast steel,
And forming a flow of air along the width direction of the casting in the hood to remove water vapor. 19. The method of claim 18,
And adjusting the height of the injection part according to the thickness of the casting.

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