KR101114422B1 - Molten mold flux feeding apparatus and molten mold flux feeding method - Google Patents

Molten mold flux feeding apparatus and molten mold flux feeding method Download PDF

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KR101114422B1
KR101114422B1 KR1020080133456A KR20080133456A KR101114422B1 KR 101114422 B1 KR101114422 B1 KR 101114422B1 KR 1020080133456 A KR1020080133456 A KR 1020080133456A KR 20080133456 A KR20080133456 A KR 20080133456A KR 101114422 B1 KR101114422 B1 KR 101114422B1
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South Korea
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mold flux
molten
molten mold
unit
melting furnace
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KR1020080133456A
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Korean (ko)
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KR20100074904A (en
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김구화
문기현
박상현
서경원
정유철
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글로벌텍 주식회사
주식회사 포스코
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Priority to KR1020080133456A priority Critical patent/KR101114422B1/en
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Abstract

The present invention relates to a molten mold flux supply device and a molten mold flux supplying method in which a mold flux is melted in advance outside the mold to be supplied to the mold in a liquid state, and the amount of the molten mold flux supplied to the mold is always maintained at a constant level. A molten mold flux supply apparatus according to the present invention, comprising: a melting unit in which a mold flux raw material is charged and melted; A tilting unit for tilting the melting unit to discharge molten mold flux from the melting unit; And a discharge unit for discharging the molten mold flux discharged from the dissolution unit.
Mold Flux, Melt Mold Flux, Melting Furnace, Tungdong

Description

MOLTEN MOLD FLUX FEEDING APPARATUS AND MOLTEN MOLD FLUX FEEDING METHOD}

The present invention relates to a molten mold flux supplying device and a molten mold flux supplying method, and more particularly, a molten mold flux supplied to the mold in a liquid state by pre-melting the mold flux from the outside of the mold, and the amount of the molten mold flux supplied to the mold is increased. The present invention relates to a molten mold flux supply device and a molten mold flux supply method for maintaining a constant level at all times.

In general, cast steel (generally slabs, billets, blooms, ranks, etc.) manufactured in a continuous casting device receives a molten steel in a liquid state from a ladle and passes through a mold to store the molten steel in a liquid state. As it passes, the solidification shell in the solid state is formed by the cooling action in the mold. The solidified shell in which the molten steel is cooled is solidified by the secondary cooling water sprayed from the spray nozzle while being guided by the guide roll installed in the lower portion thereof, thereby producing a solid cast.

In the continuous casting operation of such steel, when molten steel is supplied into a mold, not only molten steel but also a subsidiary mold flux is introduced. Mold flux is generally introduced into a solid state such as powder or granules and melted by the heat generated in the molten steel supplied into the mold to control heat transfer between the molten steel and the mold and to improve lubrication ability.

As described above, a technique has been proposed in which a mold flux supplied for lubrication in a mold is supplied to the mold in a liquid state for uniform distribution and improvement of lubrication ability. To this end, solid materials such as powder or granules are charged to the crucible at a mixing ratio, and then heated to a predetermined temperature to be melted into a liquid phase and then supplied to a mold.

1 is a schematic cross-sectional view showing a conventional molten mold flux supply apparatus.

Referring to the drawings, the conventional molten mold flux supply apparatus 10 is a crucible 30 made of a graphite flux material containing a mold flux source 20 and a mold flux dissolved from the mold flux source 20. And a heating means 40 such as a heating wire provided around the crucible 30 to melt the mold flux charged in the crucible 30, and a discharge pipe for discharging the molten mold molten from the crucible 30. And a stopper 60 for controlling the flow rate of the liquid mold flux 3 discharged by opening and closing the discharge nozzle 50 and the discharge nozzle 50.

An immersion nozzle for guiding and discharging the molten steel 1 into the lower portion of the mold flux melting furnace 10 and the molten steel 1 in a tundish (not shown) to the mold 70 ( 80 is provided to supply the mold 70 of the liquid mold flux dissolved in the melting furnace 10. Here, the upper surface of the mold 70 further includes a bottom surface cover 90 provided for thermal insulation in the mold 70, wherein the bottom surface cover 90 is an immersion nozzle 80 for discharging molten steel and a liquid mold The discharge nozzle 50 which discharges the flux 3 is installed so that it may draw in into the mold 70 inside.

The liquid mold flux 3 introduced by the conventional molten mold flux supply device as described above not only controls the heat transfer between the molten steel 1 and the mold 70 and improves the lubricating ability, but also the molten steel 1 during casting. Because it serves to dissolve the non-metallic inclusions rising to the hot water surface, when melting the mold flux in the crucible made of a conventional refractory material, the inner peripheral surface of the crucible was rapidly eroded by the molten mold flux (3).

In particular, when such erosion occurs in the outlet and stopper 60 including the discharge pipe provided for supplying the molten mold flux 3 from the crucible 30 to the mold 70, precise flow rate control of the molten mold flux becomes impossible. Stable continuous casting operation was not possible.

In addition, since the consumption amount of the mold flux varies depending on the casting conditions, even if a certain amount is always discharged from the crucible 30 when the molten mold flux 3 is injected, it is difficult to maintain the thickness of the molten mold flux layer 2 having the same thickness. There was a problem.

The present invention has been made to solve the above problems, and provides a molten mold flux supply device and a molten mold flux supply method that can be protected from erosion and thermal stress of the molten mold flux.

In addition, the thickness of the molten mold flux layer, which is supplied to the mold and formed on the molten steel surface, can be kept uniform at all times, and the raw materials for various mold fluxes are loaded directly into the melting furnace without using the mold flux of the finished product. The present invention provides a molten mold flux supply device and a molten mold flux supply method capable of easily supplying molten mold flux having various compositions as the molten mold flux is produced.

According to an aspect of the present invention, there is provided a molten mold flux supply apparatus, comprising: a melting unit in which a mold flux raw material is charged and melted; A tilting unit for tilting the melting unit to discharge molten mold flux from the melting unit; And a discharge unit for discharging the molten mold flux discharged from the dissolution unit.

The apparatus may further include a raw material supply unit that stores different raw materials for mold flux and supplies the same to the dissolution unit.

The raw material supply unit includes: a plurality of raw bins for storing different mold flux raw materials, respectively; A plurality of transfer paths for transferring the raw materials discharged from the respective raw material bins to the dissolution unit, respectively; And a gate valve disposed below the plurality of raw material bins to discharge the stored raw materials to the transfer path by a desired amount.

The dissolution unit is a container of a refractory material in which an accommodating space in which a mold flux raw material is received and melted is formed, and an upper surface of the dissolution unit is provided with a raw material inlet through which raw materials supplied from the raw material supply unit are fed, and a molten mold flux on the side surface thereof. Melting furnace is provided with an outlet for discharging; And cooling means provided on an outer circumferential surface of the melting furnace corresponding to a portion in which the molten mold flux is stored in the receiving space of the melting furnace.

The cooling means is characterized in that the cooling plate flowing coolant

In addition, the melting furnace is characterized in that the heating means for melting the mold flux raw material is further provided.

The heating means is characterized in that the electric heating element or gas burner.

The melting furnace is characterized by consisting of a chromium-based oxide.

The tilting unit includes a rotating shaft provided on the side or bottom of the melting unit; It characterized in that it comprises a drive for providing a driving force for rotating the melting unit on the basis of the rotation axis.

The discharge unit includes a discharge nozzle for allowing the molten mold flux discharged from the dissolution unit to flow into the mold of the continuous casting apparatus; And a heat insulating cover surrounding an outer circumferential surface of the discharge nozzle.

At this time, the discharge nozzle is formed of a metal pipe, a flow path is formed on the inner circumferential surface of the insulating cover so that the inert gas flows to the contact surface between the discharge nozzle and the insulating cover, the inert gas supply unit for supplying the inert gas to the flow path further Characterized in that it is provided.

The insulating cover may include a top cover and a bottom cover that are separable from each other, and may be replaced with a discharge nozzle disposed between the top cover and the bottom cover when the top cover and the bottom cover are separated.

The insulating cover is characterized in that the insulating means is built.

The heat insulating means is characterized in that the electric heating element.

A sensor for measuring the thickness of the molten mold flux supplied into the mold is provided on the upper part of the mold into which the molten mold flux is injected, and the thickness value of the mold flux measured by the sensor is fed back to the tilting unit. It is done.

The molten mold flux supplying method according to the present invention comprises the steps of: supplying the mold flux in the molten state, comprising the steps of separately weighing different raw materials for mold flux into the melting furnace; Melting the raw material for mold flux in the furnace to produce molten mold flux; Supplying the molten mold flux to the mold by tilting the melting furnace, wherein the amount of molten mold flux supplied to the mold in the melting furnace is controlled by the tilt value of the melting furnace.

And measuring the thickness of the molten mold flux layer formed on the molten steel by the molten mold flux supplied to the mold, wherein the tilt value of the melting furnace is controlled according to the thickness measurement value of the molten mold flux layer. It features.

In the producing of the molten mold flux, cooling the outer wall of the melting furnace in which the molten mold flux is stored includes forming a mold flux reaction solid layer on the inner wall of the melting furnace.

The molten mold flux supplying method according to the present invention comprises the steps of: supplying a molten mold flux in a molten state, the method comprising: supplying a molten mold flux stored in the melting furnace to a mold by tilting the melting furnace; Measuring the thickness of the molten mold flux layer formed on the molten steel surface by the molten mold flux supplied to the mold; Controlling the tilt value of the melting furnace in accordance with the measured thickness of the molten mold flux layer.

And filling each of the different mold flux raw materials into a melting furnace, respectively. Melting the raw material for the mold flux in the furnace further comprises producing a molten mold flux.

According to the present invention, since the raw ore for mold flux is injected into the melting furnace by the desired amount for each component to produce the molten mold flux, there is an effect that the molten mold flux of various compositions can be easily produced.

In addition, the melting furnace is constructed of chromium oxide having a very small reactivity with the mold flux, and a cooling means is provided on the outer wall to form a thin reaction solid layer on the inner wall of the melting furnace, thereby preventing the inner wall of the melting furnace from being damaged by the molten mold flux. It works.

In addition, the molten mold flux of the molten mold flux produced in the melting furnace is controlled by the tilt value of the melting furnace, and the tilting unit for controlling the ejection of the molten mold flux as the tilting unit for tilting the melting furnace is provided outside the furnace, the molten mold Damage to the flux can be prevented and the thickness of the molten mold flux layer formed in the mold is measured and the thickness of the molten mold flux layer is always uniformed by using the value to adjust the tilt value of the melting furnace in real time. It has a sustainable effect.

In addition, since the discharge unit, which is a means for injecting the molten mold flux discharged from the melting furnace into the mold, is divided into a metal discharge nozzle and a heat insulating cover protecting the discharge nozzle, it is easy to replace the discharge nozzle at the end of its life. have.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like numbers refer to like elements in the figures.

Figure 2 is a schematic cross-sectional view showing a molten mold flux supply apparatus according to the present invention, Figure 3 is a perspective view showing a discharge unit of the present invention.

As shown in the drawing, the molten mold flux supply apparatus according to the present invention includes a raw material supply unit 100 for storing and supplying different mold flux raw materials, and a raw material supplied from the raw material supply unit 100, respectively. The melted unit 200 to be melted and melted, the tilting unit 300 to tilt the melted unit 200 to discharge the molten mold flux from the melted unit 200, and the melt discharged from the melted unit 200. And a discharge unit 400 for injecting the mold flux into the mold 70.

The raw material supply unit 100 is a means for storing various kinds of raw materials for mold flux (hereinafter referred to as 'raw material') and controlling the amount of charge, and a plurality of raw material bins 110 in which different raw materials are stored. The raw material discharged from each of the raw material bins 110, each of the plurality of transfer paths 120 for transferring to the dissolution unit 200, and the plurality of raw material bins 110 are provided under each desired raw material And a gate valve 130 for discharging to the transfer path 120 in an amount.

The raw material bin 110 is provided with a plurality of means for storing various kinds of raw ore, respectively, a raw material outlet for discharging the raw material is formed in each lower portion, the gate valve 130 is mounted on the raw material outlet . The gate valve 130 may be made in any manner as long as it can easily adjust the discharge of the raw material. For example, it may be implemented as a sliding gate. Thus, by opening and closing the gate valve 130, by controlling the discharge of the raw material can be adjusted to the composition of the mold flux to the desired composition.

The transfer path 120 is a means for transferring the raw material to the dissolution unit 200 by being connected to the raw material outlet of the raw material bin 110, and may be made in any manner if the raw material can be transferred to the dissolution unit 200. It is okay. For example, various types of pipes such as pipes or conveyor belts can be used. However, even if the dissolution unit 200 is tilted it should be able to smoothly supply the raw material to the dissolution unit 200.

The melting unit 200 includes a melting furnace 210, heating means 220 provided in the melting furnace 210, and cooling means 230 provided on an outer wall of the melting furnace 210.

The melting furnace 210 is a means for producing a molten mold flux in a liquid state by melting the raw material when the raw material is charged, it is a container of a refractory material in which an accommodating space 211 in which the raw material is received and melted is formed. At this time, the upper surface of the melting furnace 210 is provided with a raw material inlet 213 through which the raw material supplied through the transfer path 120 of the raw material supply unit 100 is provided, the discharge hole (the molten mold flux is discharged to the side) 215 is provided. At this time, the outlet 215 is formed spaced apart from the lower surface of the melting furnace 210 by a predetermined height. In this case, the height at which the outlet 215 is formed determines the space in which the molten mold flux melted in the melting furnace 210 is stored. Thus, the molten mold flux is stored in the accommodation space 211 at a position lower than the height at which the outlet 215 is formed.

In order to prevent erosion by the mold flux, the melting furnace 210 is preferably made of a refractory material made of a mold flux raw material and a chromium-based oxide having excellent damage resistance due to the molten mold flux.

The heating means 220 is a means for melting the raw material charged in the melting furnace 210 in a liquid state, it is provided in the interior of the melting furnace 210. Preferably, the upper portion of the accommodation space 211 of the melting furnace 210 is preferably provided. At this time, the heating means 220 may be any if it can provide a high heat to melt the raw material charged in the melting furnace 210. For example, the heating means 220 is an electric heating element or gas burner is used. Thus, the raw material is melted into the molten mold flux in the liquid state by the operation of the heating means 220.

The cooling means 230 is provided on an outer circumferential surface of the melting furnace 210 corresponding to a portion in which the molten mold flux is stored in the accommodation space 211 of the melting furnace 210. Preferably it is provided on the lower side of the outer wall of the melting furnace 210 and the bottom of the melting furnace 210. Therefore, the outer wall of the melting furnace 210 in which the molten mold flux is stored is cooled to react the molten mold flux which comes into contact with the inner wall of the melting furnace 210 to form a reaction solid layer on the inner wall of the melting furnace 210. The reaction solid layer thus formed prevents the molten mold flux from directly contacting the inner wall of the melting furnace 210, thereby preventing damage to the melting furnace 210 by the molten mold flux.

The cooling means 230 may be used a variety of means for cooling the outer wall of the melting furnace 210. For example, the cooling means 230 may be a cooling plate through which cooling water flows.

The tilting unit 300 is a means for tilting the melting furnace 210 so that the molten mold flux produced in the melting furnace 210 is discharged through the discharge port 215, and is provided at the side or the bottom of the melting unit 200. Coaxial 310 and a driving unit 320 for providing a driving force for rotating the dissolution unit 200 on the basis of the rotation shaft (310).

The pivot shaft 310 supports the melting furnace 210 and becomes a reference point of rotation during rotation. The pivot shaft 310 is provided at both sides of the melting furnace 210 in the form of a projection, or as shown in the figure is provided on the bottom of the melting furnace 210. At this time, although not shown in the drawings, it is preferable that a support (not shown) supporting the pivot shaft 310 is further provided.

The driving unit 320 contacts the bottom of one side of the melting furnace 210 to raise or lower the bottom of one side of the melting furnace 210 to tilt the melting furnace 210. The driving unit 320 may be, for example, a cylinder operated by pneumatic or hydraulic pressure or an electric motor.

Discharge unit 400 is a means for supplying to the mold 70 while maintaining the molten mold flux produced and discharged in the melting furnace 210 in the liquid state, which allows the molten mold flux to flow into the mold 70 A discharge nozzle 410 and a heat insulating cover 420 surrounding the outer circumferential surface of the discharge nozzle 410.

The discharge nozzle 410 is formed of a metal pipe to allow the molten mold flux to flow while maintaining a liquid state. For example, the discharge nozzle 410 is a steel pipe is used. At this time, one side of the discharge nozzle 410 is disposed below the outlet 215 of the melting furnace 210, the other side of the discharge nozzle 410, the mold 70 is disposed above. In addition, one side of the discharge nozzle 410 is preferably formed to widen the area of the opening to facilitate the introduction of the molten mold flux. For example, as shown in FIG. 3, one end of the pipe-type discharge nozzle 410 may be cut obliquely so that the shape of the opening may be an elliptical shape. Of course, if the molten mold flux can be easily introduced into the discharge nozzle 410, various methods such as changing the shape of the discharge nozzle 410 and having a funnel-shaped auxiliary body may be applied.

In addition, an insulation cover 420 is mounted outside the discharge nozzle 410 to heat the discharge nozzle 410 to a predetermined temperature so that the molten mold flux may maintain a liquid phase. In this case, in order to prevent the discharge nozzle 410 from being oxidized at a high temperature, a contact surface of the discharge nozzle 410 and the insulating cover 420 such that an inert gas flows outside the discharge nozzle 410, that is, the thermal cover ( The inner circumferential surface of the 420 is formed with a flow path 421 provided in the groove shape. In addition, an inert gas supply unit (not shown) for supplying an inert gas separately from the discharge unit 400 may be provided to supply the inert gas to the flow path 421.

The insulating cover 420 is composed of an upper cover 420a and a lower cover 420b that can be separated and combined with each other. Thus, when the discharge nozzle 410 is replaced, the upper cover 420a and the lower cover 420b are separated to facilitate the replacement of the discharge nozzle 410. At this time, the insulating cover 420, that is, the upper cover 420a and the lower cover 420b, each of the thermal insulation means 423 is built so that the molten mold flux flowing through the discharge nozzle 410 to maintain the liquid phase The discharge nozzle 410 is heated to a predetermined temperature. As the thermal insulation means 423, for example, an electric heating element is used.

The molten mold flux supply apparatus according to the present invention controls the tilt value of the melting furnace 210 according to the thickness of the molten mold flux layer formed in the mold 70 to determine the amount of molten mold flux discharged from the melting furnace 210. Adjust. To this end, the upper part of the mold 70 is provided with a sensor for measuring the thickness of the mold flux supplied to the inside of the mold 70 in a molten state, the thickness value of the mold flux measured by the sensor is the tilting unit 300 It is preferable that the feedback to the driving unit 320 of the). Thus, the operation of the driving unit 230 of the tilting unit 300 is controlled by the thickness value of the feedback molten mold flux.

The sensor 500 may be any sensor as long as it can measure the thickness of the molten mold flux layer formed on the molten steel.

A method of supplying a molten mold flux using the molten mold flux supply device configured as described above will be described with reference to the accompanying drawings.

Figures 4a and 4b is a schematic use state diagram showing the operating state of the molten mold flux supply apparatus according to the present invention.

First, as shown in Figure 4a, in order to manufacture the molten mold flux, the desired amount of the raw material stored in each raw material bin 110 is discharged by the desired amount and charged into the interior of the melting furnace 210.

Then, by operating the heating means 220 provided in the melting furnace 210 so that a plurality of raw materials are melted and mixed. At this time, the molten mold flux is stored at the bottom of the melting furnace 210 by its own weight. At this time, the cooling means 230 provided on the wall surface of the melting furnace 210 is operated to cool the bottom outer wall of the melting furnace 210. Then, the molten mold flux F, which is in contact with the outer wall of the melting furnace 210 at which the temperature is kept lower than the molten mold flux F, is solidified to form the reaction solid layer Fg on the inner wall of the melting furnace 210. As the reaction solid layer Fg is formed on the bottom inner wall of the melting furnace 210, the hot melt mold flux F is prevented from directly contacting the inner wall of the melting furnace 210 to prevent damage to the inner wall of the melting furnace 210. Can be.

When the molten mold flux F is produced as described above, the driving unit 320 is operated as shown in FIG. 4B to tilt the melting furnace 210 in the direction of the outlet 215 based on the rotation shaft 310. The tilting of the melting furnace 210 is continued and the molten mold flux F inside the melting furnace 210 is discharged through the outlet 215 of the melting furnace 210.

The molten mold flux F discharged through the discharge port 215 is introduced into one end of the discharge nozzle 410, passes through the discharge nozzle 410, and then is injected into the mold 70. In this case, since the discharge nozzle 410 is heated to a predetermined temperature by the heat insulating cover 420 while the molten mold flux F passes through the discharge nozzle 410, the molten mold flux F may maintain a liquid state. .

The molten mold flux F injected into the mold 70 is supplied to the molten steel 1 of the molten steel 1 in the mold 70 to form the molten mold flux layer 2 on the molten steel 1 of the molten steel 1.

The thickness of the molten mold flux layer 2 formed as described above is measured by the sensor 500 provided on the mold 70.

The thickness measurement value of the molten mold flux layer 2 measured by the sensor 500 is fed back to the driving unit 320 for tilting the melting furnace 210, thereby controlling the driving of the driving unit 320 to tilt the melting furnace 210. To control the value. Thus, since the tilt value of the melting furnace 210 is controlled by feeding back the thickness measurement value of the molten mold flux layer 2 in real time, the thickness of the molten mold flux layer 2 can be always kept constant.

If the discharge nozzle 410 is oxidized and needs to be replaced, the upper cover 420a and the lower cover 420b are removed, the discharge nozzle 410 inserted therein is replaced, and then the upper cover 420a and The lower cover 420b is used in combination.

1 is a schematic cross-sectional view showing a conventional molten mold flux supply device,

2 is a schematic cross-sectional view showing a molten mold flux supply device according to the present invention,

3 is a perspective view showing a discharge unit of the present invention,

Figures 4a and 4b is a schematic use state diagram showing the operating state of the molten mold flux supply apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: raw material supply unit 110: raw material bin

200: melting unit 210: melting furnace

300: tilting unit 320: drive unit

400: discharge unit 410: discharge nozzle

420: thermal insulation cover 500: sensor

Claims (20)

  1. An apparatus for supplying a mold flux in a molten state,
    A melting unit in which a mold flux raw material is charged and melted;
    A tilting unit for tilting the melting unit to discharge molten mold flux from the melting unit;
    A discharge unit for discharging the molten mold flux discharged from the dissolution unit,
    The dissolution unit,
    A melting furnace containing a refractory material in which an accommodating space is formed in which a mold flux raw material is received and melted, an upper surface of which is provided with a raw material inlet through which the raw material is injected, and an outlet through which a molten mold flux is discharged;
    And a cooling means provided on an outer circumferential surface of the melting furnace corresponding to a portion in which the molten mold flux is stored in the receiving space of the melting furnace.
  2. The method according to claim 1,
    And a raw material supply unit for storing different raw materials for mold flux and supplying them to the dissolution unit.
  3. The method according to claim 2, wherein the raw material supply unit,
    A plurality of raw bins each having different mold flux raw materials respectively stored therein;
    A plurality of transfer paths for transferring the raw materials discharged from the respective raw material bins to the dissolution unit, respectively;
    And a gate valve provided at a lower portion of the plurality of raw material bins to discharge the stored raw materials to the transfer path by a desired amount.
  4. delete
  5. The method according to claim 1,
    The cooling means is a molten mold flux supply device, characterized in that the cooling plate flowing coolant.
  6. The method according to claim 1,
    Melting flux supply apparatus characterized in that the melting furnace is provided with a heating means for melting the mold flux raw material.
  7. The method according to claim 6,
    And the heating means is an electric heating element or a gas burner.
  8. The method according to claim 1,
    The melting furnace is a molten mold flux supply, characterized in that made of chromium-based oxide.
  9. The method of claim 1, wherein the tilting unit
    A rotating shaft provided on the side or bottom of the dissolution unit;
    And a driving unit providing a driving force for rotating the dissolution unit based on the rotation shaft.
  10. The method of claim 1, wherein the discharge unit
    A discharge nozzle for allowing the molten mold flux discharged from the melting unit to flow into the mold of the continuous casting apparatus;
    And a heat insulating cover surrounding an outer circumferential surface of the discharge nozzle.
  11. The method according to claim 10,
    The discharge nozzle is formed of a metal pipe,
    A flow path is formed on the inner circumferential surface of the insulating cover so that an inert gas flows into the contact surface between the discharge nozzle and the insulating cover.
    Melt mold flux supply device characterized in that the inert gas supply unit for supplying an inert gas to the flow path further.
  12. The method according to claim 10,
    The insulating cover is composed of an upper cover and a lower cover that can be separated from each other,
    The apparatus of claim 1, wherein the discharge nozzle disposed between the upper cover and the lower cover is replaceable when the upper cover and the lower cover are separated.
  13. The method according to claim 10,
    Melting mold flux supply apparatus, characterized in that the heat insulating cover is built in the heat insulating cover.
  14. The method of claim 13,
    The heat insulating means is a molten mold flux supply device, characterized in that the electric heating element.
  15. The method according to claim 1,
    A sensor configured to measure the thickness of the molten mold flux supplied to the inside of the mold is provided at the upper portion of the mold in which the molten mold flux is injected.
    And a thickness value of the mold flux measured by the sensor is fed back to the tilting unit.
  16. In the method for supplying the molten mold flux,
    Separately weighing different raw materials for mold flux and charging each in a melting furnace;
    Melting the raw material for mold flux in the furnace to produce molten mold flux;
    Tilting the melting furnace to supply the molten mold flux to a mold;
    The producing of the molten mold flux includes cooling the outer wall of the melting furnace in which the molten mold flux is stored to form a mold flux reaction solid layer on the inner wall of the melting furnace,
    And the molten mold flux supplied to the mold in the melting furnace is controlled by the tilt value of the melting furnace.
  17. 18. The method of claim 16,
    Measuring the thickness of the molten mold flux layer that the molten mold flux supplied to the mold forms on the molten steel surface;
    And a tilt value of the melting furnace is controlled according to a thickness measurement value of the molten mold flux layer.
  18. delete
  19. In the method for supplying the molten mold flux,
    Melting the raw material for mold flux in the furnace to produce molten mold flux;
    Tilting the furnace to supply molten mold flux stored in the furnace to the mold;
    Measuring the thickness of the molten mold flux layer formed on the molten steel surface by the molten mold flux supplied to the mold;
    Controlling the tilt value of the melting furnace according to the measured thickness of the molten mold flux layer;
    The step of producing the molten mold flux molten mold flux supply method comprising cooling the outer wall of the melting furnace in which the molten mold flux is stored to form a mold flux reaction solid layer on the inner wall of the furnace.
  20. delete
KR1020080133456A 2008-12-24 2008-12-24 Molten mold flux feeding apparatus and molten mold flux feeding method KR101114422B1 (en)

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KR101292673B1 (en) * 2011-12-20 2013-08-02 주식회사 포스코 dissolution apparatus for mold flux with plasma heater
KR101368433B1 (en) * 2012-06-29 2014-03-03 주식회사 포스코 Melt supply equipment
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