KR101364258B1 - Casting system - Google Patents

Abstract

According to the present invention, a high functional casting system comprises: a tundish for receiving molten metal; a nozzle coupled to the tundish; a mold for casting the molten metal received from the tundish through the nozzle; and a heating member for generating microwaves to heat the nozzle. Thus, the nozzle is heated by the microwaves generated from the heating device to easily melt substances which interrupt the flow of the molten metal passing the nozzle.

Description

High Performance Casting System {casting system}

The present invention relates to a high performance casting system.

A casting system is a device for casting molten steel provided from a tundish into a cast of a constant size using a mold. In order to provide the molten steel contained in the tundish to the mold side without exposure to the atmosphere, the casting system includes a nozzle formed of hard alumina or spinel refractory to connect the tundish and the mold.

Meanwhile, molten steel and a substance in the molten steel may be chemically reacted with the refractory constituting the nozzle to adhere to the inner wall of the nozzle. In this case, a phenomenon in which molten steel passing through the nozzle solidifies or adheres to the inner wall of the nozzle may be promoted. Accordingly, the flow of molten steel passing through the nozzle may not be smooth, and thus productivity of the cast steel may be reduced.

In addition, the temperature of the nozzle should be maintained at 1300 ℃ to 2000 ℃. However, as in winter, when the outside temperature drops rapidly, it is not easy to keep the temperature of the nozzle constant.

The technology related to this case is the patent application 10-2012-0073643 (the casting system).

An object of the present invention is to provide a high-performance casting system that can prevent the clogging phenomenon of the nozzle by providing a heating member for heating the nozzle.

In addition, an object of the present invention is to provide a high-performance casting system that vibrates the nozzle so that impurities do not accumulate on the inner wall of the nozzle.

In addition, an object of the present invention is to configure a chamber surrounding the nozzle, and to inject warm air heat-exchanged from geothermal heat into the chamber, thereby minimizing heat flowing out of the nozzle even in winter.

Moreover, it aims at providing the high performance casting system for preventing the theft of the mold of this invention.

In addition, it aims to provide an eco-friendly high-performance casting system by cooling the air with snow accumulated in winter to use the cast steel for cooling.

In addition, the present invention is to provide a high-performance casting system combined with a dry ice feeder coupled to the hopper magnetic hammer to drop dry ice accumulated in the hopper.

In addition, the present invention is to provide a high-performance casting system combined with a dry ice feeder that can check the life of the magnetic hammer.

In addition, the present invention is to provide a high-performance casting system combined with a dry ice feeder that can detect the falling magnetic hammer in the hopper.

In addition, the present invention is to provide a high-performance casting system combined with a dry ice feeder for sensing the amount of dry ice accumulated in the hopper, increasing the force applied to the piston.

According to an aspect of the present invention,

A tundish for receiving molten steel;

A nozzle coupled with the tundish;

A mold for receiving and casting the molten steel from the tundish through the nozzle;

A heating member disposed adjacent to the nozzle and generating microwaves to heat the nozzle;

Including a dry ice supply for cooling the cast from the mold,

The dry ice supply device,

Magnetic hammer;

A hopper in which the magnetic hammer is coupled to the side;

A vibration sensor coupled to the hopper;

 A control unit which receives a vibration amount as a signal from the vibration detection sensor;

An alarm unit configured to warn the outside by the control of the controller,

The magnetic hammer,

A housing;

A return coil coupled to the rear of the housing in a hollow shape;

An impact coil coupled to the front of the inside of the housing in a hollow shape;

It is coupled to the center of the housing, when the electromagnetic force is applied to the return coil is pushed back, and when the electromagnetic force is applied to the impact coil includes a piston coupled to the permanent magnet rushing forward,

The control unit is provided with a high-performance casting system, characterized in that to warn the outside through the alarm unit when the vibration signal detected by the vibration sensor is less than the reference value.

Also,

Further comprising a departure detection sensor between the housing and the hopper to detect that the housing is separated from the hopper,

The control unit warns to the outside through the alarm unit when receiving a signal for detecting that the housing is separated from the hopper from the departure detection sensor,

A magnet is coupled to the hopper, and the detachment detecting sensor is provided with a high performance casting system, characterized in that the hall sensor coupled to the housing in a position facing the magnet.

Also,

A light emitting unit coupled to the inside of the hopper and emitting light;

Further comprising a light receiving unit coupled to the inside of the hopper opposite the light emitting portion,

The control unit is provided with a high-performance casting system, characterized in that when the light receiving unit does not sense the light to supply more power to the impact coil to control the piston to impact the hopper more strongly.

The present invention provides a high-performance casting system that can prevent the clogging phenomenon of the nozzle by providing a heating member for heating the nozzle.

In addition, the present invention provides a high-performance casting system that vibrates the nozzle so that impurities do not accumulate on the inner wall of the nozzle.

In addition, the present invention constitutes a chamber surrounding the nozzle, and by injecting warm air heat exchanged from geothermal heat into the chamber, it minimizes the heat flowing out of the nozzle even in winter.

The present invention also provides a high performance casting system for preventing the theft of a mold of the present invention.

In addition, it is possible to provide an eco-friendly high-performance casting system by cooling the air with snow accumulated in winter to use the cast steel for cooling.

In addition, the present invention provides a high-performance casting system combined with a dry ice feeder coupled to the hopper magnetic hammer to drop dry ice accumulated in the hopper.

The present invention also provides a high performance casting system incorporating a dry ice feeder capable of checking the life of a magnetic hammer.

The present invention also provides a high performance casting system incorporating a dry ice feeder capable of detecting magnetic hammer falling from the hopper.

In addition, the present invention provides a high-performance casting system combined with a dry ice feeder for sensing the amount of dry ice accumulated in the hopper, increasing the force applied to the piston.

1 illustrates a high performance casting system in accordance with one embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the nozzle heating unit illustrated in FIG. 1.
Figure 3 is a block diagram of a dry ice supply apparatus of a high-performance casting system according to an embodiment of the present invention.
Figure 4 is a cross-sectional view of the magnetic hammer of the dry ice supply apparatus according to an embodiment of the present invention.
Figure 5 is an enlarged cross-sectional view showing a nozzle heating portion of a high-performance casting system according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention and other details necessary for those skilled in the art to understand the present invention with reference to the accompanying drawings. However, the present invention may be embodied in many different forms within the scope of the appended claims, and therefore, the embodiments described below are merely illustrative, regardless of whether they are expressed or not.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. It should be noted that the same components in the drawings are denoted by the same reference numerals and signs as possible even if they are shown in different drawings. In addition, the thickness and size of each layer in the drawings may be exaggerated for convenience and clarity, and may differ from actual layer thicknesses and sizes.

1 is a view showing a high performance casting system according to an embodiment of the present invention. Referring to FIG. 1, the high performance casting system 100 casts molten steel 5 to continuously cast a cast steel 8 of stainless steel. Device. The configuration of the high performance casting system 100 and the process of casting the cast piece 8 by the high performance casting system 100 will be described as follows.

The high performance casting system 100 is a ladle (1), long nozzle (11), tundish (10), nozzle (15), nozzle heating part (40), mold (50), feed rolls (60) and cooling water And a feeder 70.

The ladle 1 is filled with molten steel 5 which has been refined, and the molten steel 5 filled in the ladle 1 is provided to the tundish 10 through the long nozzle 11. The tundish 10 serves as a buffer for temporarily storing the molten steel 5 between the ladle 1 and the mold 50, and the molten steel 5 accommodated in the tundish 10 includes the nozzle ( 15) to the mold 50 side.

The molten steel 5 provided on the mold 50 side is cast into the cast steel 8 by the mold 50 and the primary cooling is performed on the cast steel 8. Thereafter, the slab 8 is conveyed by the conveying rolls 60, more specifically, the slab 8 withdrawn from the mold 50 is conveyed by the conveying rolls 60. While descending to the ground side, on the side the slab 8 is lowered in a vertical curved shape parallel to the first direction (D1).

In addition, while the cast piece 8 is transported by the feed rolls 60, the cast piece 8 is secondarily cooled by the coolant discharged from the coolant supply devices 70.

In general, the nozzle 15 may be formed of a hard alumina or spinel refractory containing carbon. In this case, the molten steel 5 passing through the nozzle 15 and the nonmetallic inclusions present in the molten steel 5 chemically react with the material constituting the nozzle 15 to form a composite layer (12 in FIG. 2). Can be formed. The composite layer may be formed on the inner wall of the nozzle 15 to prevent the flow of the molten steel 5 passing through the nozzle 15. However, in the embodiment of the present invention, the nozzle heating unit 40 is disposed to surround the nozzle 15, and the nozzle heating unit 40 heats and maintains the nozzle 15 at the same time. As a result, the composite layer may be melted to smoothly flow the molten steel 5 passing through the nozzle 15. A more detailed description of the structure of the nozzle heating unit 40 is as follows.

FIG. 2 is an enlarged cross-sectional view of the nozzle heating unit illustrated in FIG. 1. Meanwhile, in describing FIG. 2, components described above with reference to FIG. 1 are denoted by reference numerals, and redundant descriptions of the components are omitted.

Referring to FIG. 2, the nozzle heating unit 40 is formed to surround the outer wall of the nozzle 15. The nozzle heating part 40 includes a plurality of heating members 20, a plurality of insulating members 30, and a blocking member 35.

The heating members 20 may be arranged along the length direction of the nozzle 15, and each of the heating members 20 generates microwaves to heat the nozzle 15. Accordingly, the composite layer 12 may be melted to adhere to the inner wall of the nozzle 15 and interfere with the flow of the molten steel 5 passing through the nozzle 15.

In the embodiment of the present invention, the nozzle heating unit 40 heats the nozzle 15 to about 1300 ℃ to 2000 ℃, the frequency of the microwave generated by each of the heating members 20 is 2,400MHz to 2500MHz It can be set within a range.

The insulating members 30 are formed to surround the nozzle 15 and the heating members 20. The insulating members 30 may include a material having a high melting point such as alumina to heat the nozzle 15 so that heat for heating the nozzle 15 is prevented from being emitted to the outside.

In addition, the blocking member 35 is provided at the outermost side of the nozzle heating unit 40 to block microwaves generated from the heating members 20. Accordingly, the microwaves may be prevented from leaking to the outside by the blocking member 35, and thus the working environment may be prevented from being disturbed due to the leakage of the microwaves.

The outside of the nozzle 15 is supplied with air of about 15 degrees by the geothermal heat supply device 90. In winter, outside temperatures are below freezing. When the temperature falls in this way, since the heat of the nozzle 15 is taken away to the outside, more energy is consumed in order to raise the temperature of the nozzle more.

In the present embodiment, the air is heated by using the heat of the geothermal heat supply device 90, and the air is wrapped around the nozzle 15 to minimize the heat deprived from the nozzle 15.

The geothermal heat supply device 90 includes a chamber 91 surrounding the nozzle 15; A heat exchange part 92 buried below 10 meters underground; And a supply pipe 93 for supplying air in the heat exchange part 92 to the chamber 91. Even in the winter, images are kept at 15 degrees below 10 meters underground. After the external air is supplied to the heat exchanger 92, the image is supplied to the chamber 91 through the supply pipe 93 when the image is 10 degrees or more. The chamber 91 surrounds the nozzle 91, and the outer wall of the chamber 91 is wrapped with heat insulating material.

Cold air supply device 300 is coupled to the cast steel 8, it is possible to supply the cold air to the cast steel (8). The cold air supply device 300 includes a cold air storage 310 for storing and storing snow falling in winter; It may include a cold air supply pipe 320 for supplying the cold air of the cold air reservoir 310 to the slab (8). Cold air supply device 300 is an environmentally friendly energy source, it is possible to cool the slab (8) faster by the cold air supplied here.

As shown in FIG. 3, the dry ice supply device 200 may be further coupled to the cast steel 8. By supplying dry ice to the slab 8 through the dry ice supply apparatus 200, the slab 8 can be cooled quickly. Dry ice (M) is supplied to the hopper 120 in the form of granules. The grain-shaped dry ice M may not flow down on the inclined surface of the hopper 120 in some cases. The magnetic hammer 110 is coupled to the hopper 120 of the dry ice supply apparatus 200 of the present embodiment to allow the dry ice M to smoothly flow down the hopper 120.

Dry ice supply apparatus 200 of the present embodiment, the magnetic hammer 110; the hopper 120 is coupled to the magnetic hammer 110; and the vibration sensor 130 is coupled to the hopper 120 And a control unit 140 receiving the vibration amount as a signal from the vibration detecting sensor 130; and an alarm unit 150 that warns the outside by the control of the control unit 140.

The magnetic hammer 110, a housing 1101; a return coil 1102 coupled in a hollow to the rear of the housing 1101; and the impact coupled to the front of the inside of the housing 1101 in a hollow Coil 1103 and coupled to the center of the housing 1101, when the electromagnetic force is applied to the return coil 1102 is pushed backwards, and when the electromagnetic force is applied to the impact coil 1103 is a permanent magnet rushing forward Coupled piston 1104. The power cable 1105 supplies power to the impact coil 1103 and the return coil 1102.

The controller 140 warns the outside through the alarm unit 150 when the vibration signal detected by the vibration sensor 130 is less than or equal to a reference value.

Magnetic hammer 110 is a mechanically operated device. Thus, performance may degrade over time. Or, it may not work properly due to a malfunction. Therefore, this should be detected and alarmed to the outside. In this embodiment, the vibration sensor 130 is coupled to the outer wall of the hopper 120. When the vibration sensor 130 senses that the vibration sensed for a certain time (for example, 30 seconds) is less than or equal to the reference value, the vibration sensor 130 transmits it to the controller 140. For example, if a value of 10 is referred to as a reference value, 10 or more vibrations should always be supplied to the hopper 120 in order for dry ice accumulated in the hopper 120 to move. When the magnetic hammer 110 operates normally, a vibration signal of about 10 (reference value) is measured by the vibration sensor 130. However, when the magnetic hammer 110 operates abnormally, vibration signals of 10 or less are detected. At this time, the controller 140 detects an abnormal signal and warns the outside through the alarm unit 150. The alarm unit 150 may be an optical signal using a warning light or a sound signal using an alarm sound.

On the other hand, the magnetic hammer 110 generates vibration periodically. Thus, it may fall away from the hopper 120. Magnetic hammer 110 and the hopper 120 is coupled to the bolt, it is vulnerable to vibration. If the magnetic hammer (110) falls suddenly, the worker working from below will be greatly injured. Therefore, it is necessary to warn the outside before the magnetic hammer 110 is completely separated from the hopper 120.

In order to solve this problem, the housing 1101 and the hopper 120 may further include a departure detection sensor 160 for detecting that the housing 1101 is separated from the hopper 120. Departure detection sensor 160 may be a Hall sensor for detecting a magnetic force. In this case, a magnet may be coupled to the outer wall of the hopper 120 opposite to the hall sensor. When the housing 1101 and the hopper 120 are normally coupled, the separation detecting sensor 160 detects the magnetic force of the magnet coupled to the hopper 120. However, when the housing 1101 is to be separated from the hopper 120, the separation detection sensor 160 does not detect the magnet.

The controller 140 warns the outside through the alarm unit 150 when a signal is detected that the housing 1101 is separated from the hopper 120 from the separation detecting sensor 160.

Even though the magnetic hammer 110 continuously applies vibration, the dry ice made of granules inside the hopper 120 may not move smoothly. In this case, stronger vibrations are required. Therefore, the dry ice may sense the dry ice accumulated in the hopper 120 to control the vibration of the magnetic hammer 10.

To this end, the dry ice supply apparatus 200 of the present embodiment includes a light emitting unit 171 coupled to the inside of the hopper 120 and irradiating light; The light receiving unit 171 further includes a light receiving unit 172 coupled to the inside of the hopper 120.

The controller 140 controls the piston 1104 to impact the hopper 120 more strongly by supplying more power to the impact coil 1103 when the light receiver 172 does not detect light. do. In general, the light receiver 172 detects the light emitted from the light emitter 171. However, when the dry ice M is stacked to cover the light emitting unit 171 and the light receiving unit 172, the light receiving unit 172 may not detect light. At this time, the controller 140 controls the magnetic hammer 110 to vibrate the hopper 120 strongly.

High-performance casting system 100 of the present embodiment may further include a vibration generating device 80 for supplying vibration to the nozzle (15). The vibration generating device 80 is a device that operates as an eccentricity of the motor. By vibrating the nozzle 15, the vibration generating device 80 can smoothly flow the molten steel 15 passing through the nozzle 15. In addition, the composite layer 12 accumulated on the inner wall of the nozzle 15 is to fall easily. It is preferable that the motor of the vibration generating device 80 is not damaged by interposing a heat insulating material between the nozzle 15 and the vibration generating device 80.

The mold 50 has a satellite tracking device 400 coupled thereto. If the mold 50 is stolen, the location can be tracked by the satellite tracking device 400. Satellite tracking device 400 is preferably hidden so as not to be exposed to the outside.

5 is an enlarged cross-sectional view of a nozzle heating part of a high-performance casting system according to another exemplary embodiment of the present invention. Meanwhile, in describing FIG. 3, components described above with reference to FIGS. 1 and 2 are denoted by reference numerals, and redundant descriptions of the components are omitted.

Referring to FIG. 5, the nozzle heating part 41 of the high-performance casting system 101 may include the detection device 38 and the temperature as components other than the heating members 20, the insulating members 30, and the blocking member 35. It further comprises a sensing device 39.

The detection device 38 is spaced apart from the heating members 20 by the blocking member 35, and the detection device 38 is disposed outside the blocking member 35 to expose the outside to the heating. Detects microwaves emitted from the members 20.

Therefore, microwaves that are not blocked by the blocking member 35 and leaked to the outside may be detected by the detecting device 38.

The temperature sensing device 39 is disposed adjacent to the nozzle 15 to sense the temperature of the nozzle 15. Accordingly, whether the nozzle 15 is heated at 1300 ° C. to 2000 ° C. can be checked at any time using the temperature sensing device 39.

In the embodiment of the present invention, the temperature sensing device 39 may be a pyrometer capable of measuring the temperature of the nozzle 15 even though the temperature is not in direct contact with the nozzle 15.

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 may be made without departing from the scope of the present invention.

5: molten steel 10: tundish
20: heating members 30: insulating members
35: blocking member 40: nozzle heating portion
15: nozzle 100: high performance casting system
400: satellite tracking device

Claims (1)

A tundish for receiving molten steel;
A nozzle coupled with the tundish;
A mold for receiving and casting the molten steel from the tundish through the nozzle;
A heating member disposed adjacent to the nozzle and generating microwaves to heat the nozzle;
Including a dry ice supply for cooling the cast from the mold,
The dry ice supply device,
Magnetic hammer;
A hopper in which the magnetic hammer is coupled to the side;
A vibration sensor coupled to the hopper;
A control unit which receives a vibration amount as a signal from the vibration detection sensor;
An alarm unit configured to warn the outside by the control of the controller,
The magnetic hammer,
A housing;
A return coil coupled to the rear of the housing in a hollow shape;
An impact coil coupled to the front of the inside of the housing in a hollow shape;
It is coupled to the center of the housing, when the electromagnetic force is applied to the return coil is pushed back, and when the electromagnetic force is applied to the impact coil includes a piston coupled to the permanent magnet rushing forward,
In the high-performance casting system, the control unit warns the outside through the alarm unit when the vibration signal detected by the vibration sensor is less than the reference value,
Further comprising a departure detection sensor between the housing and the hopper to detect that the housing is separated from the hopper,
The control unit warns to the outside through the alarm unit when receiving a signal for detecting that the housing is separated from the hopper from the departure detection sensor,
A magnet is coupled to the hopper, and the separation detecting sensor is a hall sensor coupled to the housing at a position facing the magnet.
A light emitting unit coupled to the inside of the hopper and emitting light;
Further comprising a light receiving unit coupled to the inside of the hopper opposite the light emitting portion,
The controller controls the piston to impact the hopper more strongly by supplying more power to the impact coil when the light receiver does not detect light.
High-performance casting system, characterized in that the mold is further coupled to the satellite tracking device.

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