KR101987654B1 - Apparatus for scattering heat insulator and method for scattering heat insulator using the same - Google Patents

Abstract

A device for inserting a insulator and a method for inserting a insulator using the same. According to an aspect of the present invention, there is provided an apparatus for supplying a heat insulating material to an upper surface of a molten steel, the apparatus comprising: a charging unit for receiving the heat insulating material and spraying the heat insulating material on an upper surface of the molten steel; A providing unit for storing the insulating material and providing the insulating material to the charging unit; And a control unit for electronically controlling the charging unit and the supplying unit, wherein the charging unit is installed in an exhaust hood which moves to be disposed on the molten steel so as to remove dust generated when slag is discharged, When the hood is disposed on the upper portion of the molten steel, the charging unit may be provided with a insulating material charging device connected to the charging unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting a heat insulator,

The present invention relates to a device for inserting a heat insulating material and a method for inserting a heat insulating material using the same. More particularly, the present invention relates to a device for inserting a heat insulating material on an upper surface of molten steel from which slag is removed.

Generally, the steelmaking process proceeds by discharging, refining, and continuously casting the molten steel produced in the electric furnace. At this time, in order to perform the continuous casting process, it is necessary to carry out the refining furnace processing operation in the state where the lubrication is completed three times in the electric furnace,

In addition, molten steel produced through the electric furnace process is contained in the ladle, and the slag contained in the molten steel rises to the upper portion of the molten steel to form a slag layer. In order to improve the quality of the product, the slag discharging process is performed. For example, the slag is discharged through the skimmer device disclosed in Japanese Patent Application Laid-Open Nos. 2016-0148083 and 10-1510286.

In order to remove the slag through the skimmer device, the slag is dispensed with the skimmer device by tilting the ladle at a predetermined angle in order to remove the slag located on the molten steel stored in the ladle. In addition, the exhaust hood is moved to place the upper part of the ladle in order to distribute dust generated during the operation of dispensing the slag.

The molten steel is directly exposed to the atmosphere after the slag disposal process, and the temperature of the molten steel is rapidly lowered. When the temperature of the molten steel is lowered, a large amount of gas is blown in order to raise the temperature in the refining furnace processing operation, and the increase of the working time due to the addition of the additional gas, resulting in a decrease in productivity and cost loss. This problem is due to the fact that three times of molten steel to be discharged from the electric furnace must be disposed for the continuous casting, that is, the waiting time is prolonged and the temperature drop is larger.

In order to solve this problem, a worker directly inserts a bag containing a thermal insulation material into the upper part of molten steel excluded from the slag, but there is a problem of safety disaster and a problem that the thermal insulation material can not be evenly applied to the upper part of the molten steel. In addition, although a separate insulator is installed around the skimmer device, there is a problem that interference occurs in the facility where the exhaust hood moves to the upper part of the ladle where the molten steel is stored, thereby making installation difficult.

The apparatus for inserting the insulator according to the embodiment of the present invention and the method for inserting the insulator using the same make it possible to uniformly apply the insulator to the upper part of the molten steel in a short time without being interfered by the peripheral equipment.

According to an aspect of the present invention, there is provided an apparatus for supplying a heat insulating material to an upper surface of a molten steel, the apparatus comprising: a charging unit for receiving the heat insulating material and spraying the heat insulating material on an upper surface of the molten steel; A providing unit for storing the insulating material and providing the insulating material to the charging unit; And a control unit for electronically controlling the charging unit and the supplying unit, wherein the charging unit is installed in an exhaust hood which moves to be disposed on the molten steel so as to remove dust generated when slag is discharged, When the hood is disposed on the upper portion of the molten steel, the charging unit may be provided with a insulating material charging device connected to the charging unit.

Also, the providing unit may include: a storage hopper provided outside the skimmer device for removing the slag and storing the insulated material; A rotary valve arranged to constantly introduce the insulator into the charging unit from the storage hopper; And a slide gate valve provided between the rotary valve and the charging unit for controlling the flow of the thermal insulator provided in the charging unit.

Further, the rotary valve and the slide gate valve are controlled by the control unit, and the rotary valve can be controlled to be rotated in proportion to the discharge speed of the insulating material discharged from the charging unit to the molten steel.

The charging unit may further include: a raw material receiving unit for receiving a thermal insulating material provided from the providing unit; A first input unit coupled to the raw material receiver and fixed to the exhaust hood; And a second charging unit coupled to the first charging unit to uniformly distribute the heat insulating material supplied from the first charging unit to the entire upper surface of the molten steel.

The first charging unit may include an outer pipe fixed to the exhaust hood; An inner tube installed to be rotatable through the outer tube and having one end coupled to the raw material receiver and the other end coupled to the second input portion; A first motor for generating a rotational force to rotate the inner tube; And a gear portion that transmits the rotational force of the first motor to the internal pipe.

The gear portion may include a driving gear provided on a first rotating shaft of the first motor and a driven gear provided on the inner tube and meshing with the driving gear.

The apparatus may further include a bearing installed between the inner tube and the outer tube and supporting the inner tube so as to be rotatable from the outer tube.

In addition, at least one fixing plate may be provided to support the outer side of the outer tube so that the first loading portion is fixed to the exhaust hood.

The second input unit may include a second motor provided in the exhaust hood and generating a rotational force; An inlet pipe connected to the second motor so as to be arranged in a horizontal direction with a predetermined length and having an inlet port through which the heat insulating material is inserted from the first inlet; And a transfer unit provided in the injection pipe in the longitudinal direction and coupled with the second rotation shaft of the second motor for rotating and transferring the heat insulating material, wherein the injection pipe is provided with a heat insulating material conveyed from the transfer unit in the longitudinal direction of the injection pipe And a plurality of discharge holes for discharging the molten steel to an upper portion of the molten steel. The plurality of discharge holes may be spaced apart from each other by a predetermined distance in the longitudinal direction of the discharge pipe.

In addition, the plurality of discharge holes may be formed to increase in size in a direction in which the insulating material in the discharge pipe is conveyed.

In addition, the conveying unit may be formed of a coil-shaped screw so as to rotate and convey the heat insulating material.

Further, a flange mounted on the motor may be provided at one end of the injection pipe.

According to another aspect of the present invention, there is provided a method of inserting a thermal insulating material on an upper surface of molten steel, comprising the steps of: (a) placing an exhaust hood provided with an input unit for spraying the thermal insulating material on an upper part of a ladle storing molten steel; (b) providing a thermal insulation material from the providing unit provided outside the skimmer device for removing the slag to the input unit; And (c) spraying a heat insulating material onto the upper surface of the molten steel through the charging unit.

In the step (c), the second motor of the charging unit may be operated so as to rotate the conveying unit that conveys the thermal insulating material in the longitudinal direction of the inlet pipe and discharges the thermal insulating material as it is rotated. And operating the first motor of the charging unit to rotate the inner pipe for injecting the insulating material into the charging pipe.

In the step (b), the rotary valve provided at the lower end of the storage hopper may be operated to discharge the storage material stored in the storage hopper of the providing unit uniformly. And operating a slide gate valve provided at a lower end of the rotary valve to control a flow of a heat insulating material discharged from the rotary valve.

In addition, when inserting the insulating material onto the upper surface of the molten steel through the charging unit, the inserting material can be stopped when the actual charging amount is equal to or greater than the set charging amount.

In addition, the operation of the slide gate valve, the rotary valve, the first motor, and the second motor can be sequentially stopped when the insulator is stopped to be charged.

In addition, a plurality of discharge holes are formed in a longitudinal direction of the discharge tube provided inside the transfer section, and the plurality of discharge holes gradually increase in size in a direction in which the heat insulating material is conveyed to uniformly apply a thermal insulating material to the upper surface of the molten steel .

The apparatus for inserting the insulator according to the embodiment of the present invention and the method for inserting the insulator using the insulator can apply the insulator directly to the upper surface of the molten steel through the insulator after injecting the slag, It is effective. Accordingly, it is possible to reduce the gas blowing time for reducing the temperature of the existing molten steel and to reduce the cost due to the prevention of gas consumption.

Further, the temperature reduction can be minimized by evenly applying the insulating material to the upper part of the molten steel. Accordingly, it is possible to minimize the temperature deviation of the molten steel supplied to the refining furnace working process after the disposing process, and it becomes possible to perform the standardized refining furnace melting process.

In addition, it is possible to install the insulating material input device on the exhaust hood which is used conventionally, without being interfered with existing facilities and to be easily installed.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in detail with reference to the following drawings, which illustrate preferred embodiments of the present invention, and thus the technical idea of the present invention should not be construed as being limited thereto.
1 is a view schematically showing a state in which a insulator insertion device according to an embodiment of the present invention is installed in a skimmer device.
2 is an exploded perspective view showing a first charging unit of a charging unit provided in the insulator insertion apparatus according to an embodiment of the present invention.
3 is an exploded perspective view showing a second charging unit of the charging unit provided in the insulating material charging device according to the embodiment of the present invention.
FIG. 4 is a perspective view illustrating a state in which the first charging unit and the second charging unit of FIG. 2 and FIG. 3 are coupled.
5 is a view showing a driving state of the insulator insertion apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a method of inserting a thermal insulating material using a thermal insulating material injecting apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

2 is a disassembled perspective view showing a first charging unit of the charging unit provided in the insulator insertion apparatus, and FIG. 3 is an exploded perspective view of the inserting unit, FIG. 4 is a perspective view showing a state where the first charging unit and the second charging unit are coupled to each other, FIG. 5 is a perspective view showing a driving state of the insulator insertion apparatus Fig.

1 to 5, a thermal insulating material inserting apparatus 1 according to an aspect of the present invention is a device for inserting a thermal insulating material 30 on the upper surface of a ladle 11 storing molten steel, A charging unit 200 for receiving the thermal insulating material 30 from the supplying unit 100 and spraying the thermal insulating material on the upper surface of molten steel and a charging unit 200 for electronically supplying the supplying unit 100 and the charging unit 200 And a control unit 300 for controlling the control unit 300.

Prior to the description of the insulator insertion apparatus 1, a slag disposal apparatus (hereinafter referred to as a "skimmer apparatus") in which the insulator insertion apparatus 1 is installed will be briefly described. 1, the skimmer device 10 includes a ladle 11 for storing molten steel, a ladle stand 12 for rotatably supporting the ladle 11, a slag 20 formed on the molten steel, And a slag removing unit 14 installed in the boom 13. The slag removing unit 14 includes a boom 13 and a slag removing unit 14, Since the skimmer device 10 is a well-known technology, a detailed description thereof will be omitted.

The skimmer device 10 is provided with a movable exhaust hood 15 for discharging dust generated during the slagging operation. The exhaust hood 15 is moved so as to be disposed on the molten steel, that is, the upper portion of the ladle 11, during the slag 20 disposal work. The injection unit 200 provided in the insulator insertion apparatus 1 according to one aspect of the present invention is installed in the exhaust hood 15 and is arranged to be moved together with the exhaust hood 15. [ The input unit 200 and the providing unit 100 are connected to each other so that the heat insulating material 30 is provided from the providing unit 100 in a state where the exhaust hood 15 is disposed on the upper side of the ladle 11. [ The structure in which the charging unit 200 is installed in the exhaust hood 15 and the structure in which the charging unit 200 is connected to the providing unit 100 will be described below.

The providing unit 100 is provided outside the skimmer device 10. [ More specifically, the providing unit 100 includes a storage hopper 110 for storing the heat insulating material 30, a rotary valve 120 for controlling the discharge amount of the heat insulating material 30 discharged from the storage hopper 110, And a slide gate valve 130.

The storage hopper 110 is a container for storing the externally supplied insulating material 30 before it is put on the upper surface of molten steel contained in the ladle 11. [ The storage hopper 110 has a tapered shape gradually decreasing in diameter from the upper part to the lower part. Therefore, the insulating material 30 stored in the storage hopper 110 can be easily dropped by its own weight. In addition, a supply pipe 112 may be installed below the storage hopper 110 to provide the insulator 30 with the input unit 200.

The rotary valve 120 is installed at the lower end of the storage hopper 110. That is, the rotary valve 120 may be installed in the supply pipe 112. The rotary valve 120 plays a role of constantly inputting the heat insulating material 30 from the storage hopper 110 to the input unit 200. Further, the rotary valve 120 can be selectively operated by an operator and is controlled by the control unit 300. [ For example, the rotary valve 120 rotates the valve body so as to have a rotation angle of 90 °, and performs an opening / closing operation.

On the other hand, the rotary valve 120 can be controlled to rotate in proportion to the discharge speed of the heat insulating material 30 discharged from the charging unit 200 to the molten steel. This is because a sufficient amount of the heat insulating material 30 is provided to the input unit 200 so that the heat insulating material 30 is prevented from clogging due to the inflow of a large amount of the heat insulating material 30 when the heat insulating material 30 is discharged, And the like.

The slide gate valve 130 is installed in the supply pipe 112 at the lower end of the rotary valve 120 and controls the flow of the heat insulating material 30 discharged from the rotary valve 120 according to the opening and closing operation. The slide gate valve 130 can be selectively operated by an operator and is controlled by the control unit 300. [

The charging unit 200 is configured to receive the insulating material 30 from the providing unit 100 and to spray the insulating material on the upper surface of the molten steel. The input unit 200 is installed in the exhaust hood 15, which is provided to remove dust generated when the slag 20 is disposed, as described above. When the exhaust hood 15 is moved to be disposed on the upper side of the ladle 11 at the time of disposal of the slag 20, the injection unit 200 provided in the exhaust hood 15 is arranged to move together with the exhaust hood 15 . More specifically, the input unit 200 includes a raw material receiving unit 230 for receiving the heat insulating material 30 provided from the providing unit 100, a first receiving unit 230 coupled to the raw material receiving unit 230 and fixed to the exhaust hood 15, And a second input unit 220 coupled with the input unit 210 and the first input unit 210 to spray the thermal insulation 30.

The raw material receiving part 230 is a container for storing the temporary holding material 30 provided in the storage hopper 110 for temporary storage. The raw material receiving part 230 has a tapered shape gradually decreasing in diameter from the upper part to the lower part. Thus, the heat insulating material 30 provided in the raw material receiving part 230 can be easily dropped by its own weight. The raw material receiving part 230 is provided so as to be exposed to the outside of the exhaust hood 15. This is to allow the heat insulating material 30 to be easily transferred from the providing unit 100. As an example, the raw material receiving unit 230 may be configured to be connected to the providing unit 100 in a state in which the exhaust hood 15 is moved to be disposed on the molten steel. 1, when the exhaust hood 15 is disposed on the upper portion of the molten steel, the material receiving portion 230 is disposed below the outlet of the supplying pipe 112 of the supplying unit 100. Therefore, the heat insulating material 30 discharged from the supply pipe 112 drops down to the raw material receiving part 230 and is supplied.

The first input part 210 is coupled to the raw material receiving part 230 and is fixed to the exhaust hood 15. The first input unit 210 includes an outer tube 215 fixed to the exhaust hood 15 and an inner tube 213 installed to be rotatable through the outer tube 215. The control unit 300 A first motor 211 for generating a rotational force to rotate the inner tube 213 and a gear 217 for transmitting the rotational force of the first motor 211 to the inner tube 213.

The outer tube 215 has a predetermined length and is arranged in a vertical direction and fixed to the exhaust hood 15. [ For example, the outer tube 215 may be restricted in movement by being supported outward by at least one fixing plate 214 fixed to the exhaust hood 15. [ The upper and lower sides of the outer tube 215 are preferably supported and fixed by the fixing plate 214, respectively. Thus, the exhaust hood 15 can be stably moved together when it is moved.

The inner tube 213 is installed through the outer tube 215 and has one end coupled to the raw material receiver 230 and the other end coupled to the input tube 223 of the second input unit 220 to be described later. The inner tube 213 is rotatably installed from the outer tube 215. Accordingly, a bearing 212 may be installed between the inner tube 213 and the outer tube 215. The bearing 212 is preferably installed to support the upper and lower sides of the inner tube 213 so that the inner tube 213 is stably rotated from the outer tube 215. The inner pipe 213 communicates with the raw material receiving pipe 230 and the feed pipe 223 and serves as a movable passage of the heat insulating material 30. In addition, when the inner tube 213 rotates, the material receiver 230 rotates together. That is, the raw material receiving portion 230 and the internal pipe 213 are rotated to easily move the heat insulating material 30 downward.

The internal tube 213 as described above receives the rotation force generated from the first motor 211 through the gear portion 217 and rotates. For example, the gear portion 217 is engaged with the driving gear 217a and the driving gear 217a provided on the first rotating shaft 211a of the first motor 211, and the driven gear 217b . The driving gear 217a rotates in accordance with the rotation of the first rotating shaft 211a and the driven gear 217b engaged with the driving gear 217a rotates so that the inner tube 213 rotates. At this time, the driving gear 217a and the driven gear 217b of the gear portion 217 are shown as being made of a flat gear assembly structure, but the present invention is not limited thereto and various gear assembly structures may be used as long as they can transmit rotational force.

The second charging part 220 uniformly distributes the insulating material 30 over the entire upper surface of the molten steel. The second input unit 220 is installed in the exhaust hood 15 and is coupled to the first input unit 210. The second charging unit 220 includes a second motor 221 for generating a rotating force and a charging pipe 223 and a charging pipe 223 which are coupled to the second motor 221, (Not shown).

The second motor 221 is controlled by the control unit 300 and generates rotational force. The second motor 221 is provided in the exhaust hood 15.

The injection pipe 223 has a predetermined length and is arranged in the horizontal direction and coupled to the second motor 221. For example, a flange 223a for coupling with the second motor 221 is formed on one side of the injection pipe 223 in the radial direction. Can be bolted to the second motor 221 through the flange 223a. At this time, the second rotation shaft 221a of the second motor 221 is inserted into the charging pipe 223 and disposed in the charging pipe 223. The inlet pipe 223 is formed with an inlet 224 to receive the heat insulating material 30 from the first inlet 210. The inlet 224 is formed in the vicinity of the second motor 221 and is provided to receive the insulating material 30. The inlet 224 is formed on the upper side of the inlet pipe 223 so that the insulating material 30 dropped from the upper side can be easily inserted.

A plurality of discharge holes 225 for injecting the heat insulating material 30 into the upper portion of the molten steel are formed in the charging pipe 223. The plurality of discharge holes 225 may be spaced apart from each other along the longitudinal direction of the charging pipe 223. A plurality of discharge holes 225 are formed on the lower side of the charging pipe 223 to discharge the insulating material 30 to the upper surface of the molten steel. The plurality of discharge holes 225 are formed to increase in size in a direction away from the second motor 221, that is, in a direction in which the insulating material 30 in the charging pipe 223 is conveyed. This is because the heat insulating material 30 is conveyed in the longitudinal direction of the inlet pipe 223 by the conveying unit 227 which will be described later and the heat insulating material 30 is discharged through the discharge hole 225 formed at a position close to the inlet 224 Because. That is, in order to prevent excessive discharge of the heat insulating material 30 discharged through the discharge hole 225 formed at a position closer to the inlet 224 than the discharge hole 225 formed at a position away from the inlet 224. Therefore, the discharge amount of the heat insulating material 30 is increased as it goes away from the inlet 224, so that the heat insulating material 30 can be evenly applied to the entire upper surface of the molten steel.

The transfer unit 227 has a predetermined length and is provided in the charging pipe 223 to transfer the insulating material 30. One end of the transfer unit 227 is coupled with the second rotation shaft 221a of the second motor 221 and is installed to rotate. At this time, the conveying unit 227 may be a coil-shaped screw so that the heat insulating material 30 is conveyed as the conveying unit 227 rotates. As the feeding part 227 is formed of a screw, the heat insulating material 30 can be uniformly discharged in the form of particles without being gathered.

The temperature of the molten steel can be reduced by applying the insulating material 30 evenly to the upper surface of the molten steel from which the slag 20 is removed through the above-described insulator insertion device 1. [ Particularly, after the completion of the slag elimination process, the heat insulating material 30 can be continuously supplied through the insulator insertion device 1, and temperature reduction of the molten steel can be minimized.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Examples and Comparative Examples

The temperature of the molten steel according to the conventional method (comparative example) is compared with the method (example) in which the heat insulating material 30 is inserted through the present tempering material feeding device 1 according to one aspect of the present invention. Specifically, molten steel for steelmaking of two products of SUS 304 and SUS 316L was prepared, and 2bag (400 kg) of a heat insulating material was applied after discharging slag 20. The waiting time for continuous casting in the steelmaking process was 94.1 minutes for SUS 304 and 66.2 minutes for SUS 316L. Under these set conditions, the respective reduced temperatures were measured.

division Temperature reduction (℃ / min) Average molten metal
Lead time (minutes) Temperature difference (℃) Example Comparative Example SUS 304 -0.8 -1.2 94.1 37.64 SUS 316L -1.1 -1.5 66.2 26.48

As shown in Table 1, it can be confirmed that the temperature of the molten steel falls by 0.8 ° C and 1.1 ° C per minute depending on the product when the insulating material 30 is inserted by the insulator insertion device 1 of the present invention. On the other hand, according to the existing conventional method, it can be confirmed that the temperature of the molten steel falls by 1.2 ° C. and 1.5 ° C. per minute depending on the product. That is, in the case of this embodiment, the temperature was reduced by 75.28 ° C and 72.82 ° C depending on the product during the waiting time, and in the comparative example, the temperature was decreased by 112.92 ° C and 99.3 ° C depending on the product during the waiting time. That is, when the heat insulating material 30 was put in the manner of the present embodiment as compared with the conventional method, the molten steel temperature of each product was measured to be 37.64 ° C and 26.48 ° C higher, respectively. Accordingly, it is possible to reduce the amount of gas injected for increasing the temperature and the working time in the refining furnace process, which is a post-discharge process, thereby reducing the cost and improving the productivity.

Hereinafter, a method for inserting a thermal insulating material using the thermal insulating material injecting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG.

The method of inserting the insulating material 30 through the insulator insertion apparatus 1 of the present invention can be roughly divided into three steps. For example, the position of the exhaust hood 15 in the upper part of the ladle 11 storing the molten steel is determined in step S10 and a step in which the supply unit 100 provided on the outside of the skimmer unit 10, The steps S40 and S50 of providing the heat insulating material 30 with the heat insulating material 200 and the step S20 and S30 of spraying the heat insulating material 30 to the upper surface of the molten steel through the injection unit 200 may be performed. The steps described above are not limited thereto and may include steps S40 and S50 of providing the insulator to the input unit 200 through the providing unit 100 and inserting the insulator 30 into the inserting unit 200. [ (S20 and S30) can be carried out simultaneously. Further, after the operation steps S20 and S30 of the input unit 200 are performed first, the operation steps S40 and S50 of the providing unit 100 are advanced It is possible.

When the operator first presses an operation switch (not shown) of the insulator insertion apparatus 1, the control unit 300 determines whether the exhaust hood 15 is in the discharge position, that is, (S10). When the exhaust hood 15 is not disposed at the upper part of the ladle 11, a signal is transmitted so that the exhaust hood 15 is disposed at the upper part of the ladle 11. [ When the exhaust hood 15 is disposed at the upper portion of the ladle 11, the insulator insertion apparatus 1 is operated. At this time, the slag 20 on the molten steel in the ladle 11 is in a state of being dispensed. In addition, the storage hopper 110 of the providing unit 100 is in a state in which the insulating material 30 is stored.

Next, when it is determined by the control unit 300 that the exhaust hood 15 is disposed on the ladle, the control unit 300 sequentially operates the second motor 221 and the first motor 211 (S20, S30). That is, the second motor 221 operates and the transfer unit 227 for transferring the thermal insulation material 30 rotates and the first motor 211 operates to rotate the inner pipe 213 and the material receiving unit 230 .

Subsequently, the control unit 300 sequentially activates the slide gate valve 130 and the rotary valve 120 of the providing unit 100 (S40, S50). Accordingly, the thermal insulating material 30 stored in the storage hopper 110 is constantly discharged by the rotary operation of the rotary valve 120. As the slide gate valve 130 is opened, the thermal insulating material 30 contacts the supply pipe 112 And is provided to the input unit 200 through the input unit 200.

When the heat insulating material 30 is supplied to the charging pipe 223 of the second charging part 220 through the first charging part 210 during operation according to the above operation procedure, 30 are fed in the longitudinal direction of the feed pipe 223. That is, the heat insulating material 30 to be conveyed is discharged into a plurality of discharge holes 225 formed in the lower portion of the charging pipe 223 and dropped onto the upper surface of the molten steel. At this time, since the plurality of discharge holes 225 are gradually increased in diameter in the direction of transfer of the heat insulating material 30, the heat insulating material 30 can be evenly applied to the entire upper surface of the molten steel.

On the other hand, the rotary valve 120 can be controlled to rotate in proportion to the discharge speed of the heat insulating material 30 discharged from the charging unit 200 to the molten steel. This is because a sufficient amount of the heat insulating material 30 is provided to the input unit 200 so that the heat insulating material 30 is prevented from clogging due to the inflow of a large amount of the heat insulating material 30 when the heat insulating material 30 is discharged, And the like.

Subsequently, when the actual amount of the molten steel is equal to or greater than the set amount of molten steel at the time of spraying the molten steel to the upper surface of the molten steel through the charging unit 200, the insulator is stopped to be charged (S50). That is, the amount of the insulator 30 to be charged is set in advance in order to exhibit the effect of reducing the temperature of the molten steel, and the amount of the insulator 30 to be actually charged from the insulator insertion device 1 is compared and judged in real time. Therefore, if the input amount of the insulator 30 is equal to the set amount of input, the insulator insertion device 1 is stopped.

The sequence of stopping the insulator insertion apparatus 1 can be performed in the reverse order of the sequence of activating the insulator insertion apparatus 1 (S60 to S100). That is, the rotary valve 120, the slide gate valve 130, the first motor 211, and the second motor 221 are sequentially stopped by the control unit 300.

As described above, when the operator presses the operation switch of the insulator insertion apparatus 1, the control unit 300 electronically controls the providing unit 100 and the charging unit 200, and the insulator 30 is provided on the upper surface of the molten steel Spray. When the insulator 30 is sprayed by a predetermined amount, the control unit 300 senses the insulated insulator 30 and stops the insulator insertion device 1 automatically.

On the other hand, as described above, the operation sequence of the insulator insertion apparatus 1 is one example in which the providing unit 100 for providing the insulator 30 and the inserting unit 200 for spraying the insulator 30 are operated simultaneously It may be stopped.

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 understood that various modifications and changes may be made without departing from the scope of the appended claims.

1: insulator insertion device 10: skimmer device
15: Exhaust hood 30: Insulating material
100: Providing unit 110: Storage hopper
120: rotary valve 130: slide gate valve
200: input unit 210: first input unit
211: first motor 213: inner tube
215: outer tube 217: gear portion
220: second input portion 221: second motor
223: input pipe 225: exhaust pipe
227: transfer unit 300: control unit

Claims (18)

An apparatus for supplying a heat insulating material to an upper surface of molten steel,
An input unit for receiving the thermal insulating material and applying the thermal insulating material to the upper surface of the molten steel;
A providing unit for storing the insulating material and providing the insulating material to the charging unit; And
And a control unit for electronically controlling the input unit and the providing unit,
Wherein the charging unit is fixed to an exhaust hood which is moved to be disposed on the molten steel to remove dust generated when discharging the slag,
Wherein when the exhaust hood is disposed on the molten steel, the charging unit is connected to the providing unit,
The charging unit includes:
A raw material receiving unit for receiving a thermal insulating material provided from the providing unit;
A first input unit coupled to the raw material receiver and fixed to the exhaust hood; And
And a second inserting unit for inserting the insulator supplied from the first inserting unit,
And a second charging unit for uniformly distributing the molten steel over the entire upper surface of the molten steel,
Wherein the second input unit comprises:
A second motor provided in the exhaust hood and generating rotational force;
An inlet pipe connected to the second motor so as to be arranged in a horizontal direction with a predetermined length and having an inlet port through which the heat insulating material is inserted from the first inlet; And
And a transfer unit provided in the injection pipe in the longitudinal direction and coupled with the second rotary shaft of the second motor to rotate and transfer the heat insulating material,
A plurality of discharge holes for discharging a heat insulating material, which is transferred from the transferring portion in the longitudinal direction of the charging pipe, to the upper portion of the molten steel,
Wherein the plurality of discharge holes are spaced apart from each other by a predetermined distance in a longitudinal direction of the charging pipe and are formed to increase in size in a direction in which the insulating material in the charging pipe is conveyed. The method according to claim 1,
The providing unit includes:
A storage hopper provided outside the skimmer device for removing the slag and storing the thermal insulation material;
A rotary valve arranged to constantly introduce the insulator into the charging unit from the storage hopper; And
And a slide gate valve provided between the rotary valve and the charging unit for controlling the flow of the thermal insulator provided in the charging unit. 3. The method of claim 2,
Wherein the rotary valve and the slide gate valve are controlled by the control unit,
Wherein the rotary valve is controlled to rotate in proportion to a discharge speed of a heat insulating material discharged from the charging unit to the molten steel. delete The method according to claim 1,
Wherein the first charging unit comprises:
An outer tube fixed to the exhaust hood;
An inner tube installed to be rotatable through the outer tube and having one end coupled to the raw material receiver and the other end coupled to the second input portion;
A first motor for generating a rotational force to rotate the inner tube; And
And a gear portion for transmitting the rotational force of the first motor to the internal pipe. 6. The method of claim 5,
Wherein the gear portion includes a drive gear provided on a first rotary shaft of the first motor and a driven gear provided on the inner tube and mating with the drive gear. 6. The method of claim 5,
And a bearing installed between the inner tube and the outer tube for supporting the inner tube rotatably from the outer tube. 6. The method of claim 5,
Wherein at least one fixing plate for supporting an outer side of the outer tube is provided so that the first injection portion is fixed to the exhaust hood. delete delete The method according to claim 1,
Wherein the conveying portion is made of a coil-shaped screw so as to rotate and convey the heat insulating material. The method according to claim 1,
And a flange mounted on the motor is provided at one end of the charging pipe. A method for inserting a heat insulating material on the upper surface of molten steel,
(a) connecting an input unit to a supply unit for providing a thermal insulation material as an input unit by positioning an exhaust hood to which the input unit for spraying the thermal insulation material is fixed, on an upper portion of the ladle in which molten steel is stored;
(b) providing a thermal insulation material from the providing unit provided outside the skimmer device for removing the slag to the input unit; And
(c) spraying a heat insulating material onto the upper surface of the molten steel through the charging unit,
Wherein the step (b) comprises the steps of: operating a rotary valve provided at a lower end of the storage hopper so as to constantly discharge the heat insulating material stored in the storage hopper of the providing unit; And operating a slide gate valve provided at a lower end of the rotary valve to control a flow of a heat insulating material discharged from the rotary valve,
(C) operating the second motor of the charging unit to transfer the thermal insulating material in the longitudinal direction of the charging tube as the thermal conductive material is rotated and to rotate the transfer unit for discharging the thermal insulating material; And operating the first motor of the charging unit to rotate the inner pipe to inject the insulator into the charging pipe,
A plurality of discharge holes are formed in a longitudinal direction of the discharge pipe provided inside the transfer section, and the plurality of discharge holes gradually increase in size in a direction in which the heat insulating material is conveyed to uniformly apply a thermal insulating material to the upper surface of the molten steel Insulating material input method. delete delete 14. The method of claim 13,
And inserting the insulator when the actual amount of input is equal to or greater than the set amount of the insulator when spraying the insulator to the upper surface of the molten steel through the inserting unit. 17. The method of claim 16,
Wherein the slide gate valve, the rotary valve, the first motor, and the second motor are sequentially stopped when the insulator is stopped to be charged. delete

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