KR101193575B1 - Holding furnace the system using high frequency induction heating furnace - Google Patents

Abstract

PURPOSE: A high-frequency induction heating furnace system using a holding furnace is provided to prevent the outflow of molten materials from a holding furnace because a rim blocks the molten materials from entering between a refractory and a protective block. CONSTITUTION: A high-frequency induction heating furnace system comprises two melting furnaces(10) melting iron scrap by high-frequency induction heating, a holding furnace(20) receiving and mixing molten materials from the melting furnaces, removing foreign materials, and stabilizing the temperature of the molten materials through high-frequency induction heating, and a ladle(40) receiving the molten materials from the holding furnace and injecting the molten materials into a mold(60).

Description

High Frequency Induction Heating Furnace Equipment Using Insulating Furnace {HOLDING FURNACE THE SYSTEM USING HIGH FREQUENCY INDUCTION HEATING FURNACE}

The present invention relates to a high frequency induction heating apparatus using a heating furnace, and more particularly, the gas contained in the melt through the gas supply means while maintaining the temperature of the melt supplied from the melting furnace using a high frequency induction heating furnace and High frequency induction heating apparatus using a heating furnace to remove impurities, and then tap the melt into the ladle and inject the melt into the mold to prevent the temperature of the melt from dropping and improve the quality of the melt injected into the mold. It is about.

In general, metal melting furnaces having relatively low dissolution capacities include crucible furnaces, reflecting furnaces, electric furnace cupolas, and the like. Divided

In particular, high-frequency induction heating furnace injects scrap metal to melt the metal in the high-frequency electromagnetic field.

The high frequency induction heating furnace is introduced into the scrap metal, gas supply means for injecting nitrogen and argon gas to remove impurities is not installed.

This is because the gas supply means may be damaged during the metal input process. Therefore, in the high frequency induction furnace, usually only functions to melt the metal.

For this reason, a gas supply means is installed in a ladle that receives the molten melt from the high frequency induction furnace and injects the molten material to remove impurities contained in the melt from the ladle.

However, these ladles have a problem in that the temperature of the melt is lowered because the impurities are removed by receiving nitrogen and argon gas while being towed and moved by a crane installed on the ceiling.

In addition, since the ladle is towed and moved, the high frequency induction coil installed in the high frequency induction furnace is not installed.

Therefore, if the impurities are removed together with the movement in the ladle as described above, not only is it difficult to move quickly to the ladle, but also there is a problem that the quality of the melt injected into the compound due to the rapid temperature drop of the melt is uneven. .

The present invention has been made in view of the above problems, an object of the present invention is to maintain the temperature of the melt supplied from the melting furnace using a high-frequency induction heating furnace and the gas contained in the melt through the gas supply means and High frequency induction heating apparatus using a heating furnace to remove impurities, and then tap the melt into the ladle and inject the melt into the mold to prevent the temperature of the melt from dropping and improve the quality of the melt injected into the mold. To provide.

According to a feature of the present invention for achieving the above object, the first invention relates to a high frequency induction heating apparatus using a thermal insulation furnace, for this purpose, in the high frequency induction heating apparatus, scrap metal through high frequency induction heating Two melting furnaces 10 for dissolving the melt, and the heat of the melting furnace 20 to stabilize the temperature of the melt through the high frequency induction heating to remove impurities by directly receiving and melt the melt of each melting furnace 10 And, the ladle (40) for receiving the melt from which the impurities are removed from the thermal furnace (20) to inject the melt into the compound (60), the thermal furnace 20 is made of the melt Gas supply means 30 for injecting nitrogen and argon gas in the lower portion for stirring and removal of impurities is provided, and the gas supply means 30 has a slit 311 for discharging nitrogen and argon gas. Buried so as to be exposed to the bottom surface of the furnace 20, the lower portion of the connector 34 is connected to the external nitrogen tank or argon tank is configured to be exposed to the outside of the heating furnace 20, is configured, The heating furnace 20 is disposed between the melting furnace 10 and disposed at a lower position than the melting furnace 10 so as to receive the melt from the melting furnace 10, and the front of the heating furnace 20. And further includes a bit 50 is dug inward, the ladle 40 is located on the bit (50) lower than the thermos 20 to receive the melt of the thermos 20 It is characterized in that the configuration.

According to a second invention, in the first invention, the melting furnace 10 is a furnace 11, a support 12 disposed at the center of the furnace 10 in a state spaced apart from the furnace 11, and the support ( 12) a high frequency induction coil 13 disposed in a cylindrical shape inside, a pushing block 15 disposed below a center of the high frequency induction coil 13, and the pushing block 15, and the high frequency induction coil is embedded. It is preferable that it is comprised from the refractory body 14 arrange | positioned inside the coil 13.

According to a third aspect of the present invention, in the second invention, the thermal insulation furnace 20 is a support body 22 disposed in the center of the melting furnace 10 in a state spaced apart from the furnace body 21, the furnace body 21, and the support body. A high frequency induction coil 23 disposed in a cylindrical shape inside the 22, a pushing block 25 disposed below a center of the high frequency induction coil 23, and an upper portion of the pushing block 25. It is preferable that the gas supply means 30 and the refractory material 24 disposed inside the high frequency induction coil 23 to expose the slit 311 formed on the upper surface of the gas supply means 30.

In the fourth invention, in the third invention, it is preferable that the pushing block 25 is further formed with an opening 251 to expose the connector 34 of the gas supply means 30 at the center thereof.

The fifth invention, in the first invention, the gas supply means 30 is a rectangular nozzle block 31 for inducing a gas is formed through the slit 311 of a straight line at a predetermined interval, and the nozzle block A tapered rhombic inner protective block 32 covering and protecting the 31, an outer protective block 33 covering and protecting the inner protective block 32, and nitrogen or argon gas to the slit 311. The lower portion is exposed to the outside of the outer protective block 33 so that the supply, the upper portion includes a connector 34 connected to be in communication with the slit 311 of the nozzle block 31, the inner protective block 32 The space 35 is formed at the lower portion of the nozzle block 31 so that nitrogen or argon gas flowing into the slits 311 may be uniformly supplied to the metal thin plate 321 made of alumina, and the space may be provided. It is preferable that the upper portion of the connector 34 is connected to the portion 35.

Sixth invention, in the fifth invention, the outer protective block 33 preferably further comprises a protruding frame 331 protruding along the circumferential surface in order to prevent the melt from leaking.

According to a seventh invention, in the third invention, the heat retention furnace 20 and the melting furnace 10 are supported by a support plate 70 on the upper outer side of the furnace bodies 11 and 21, and the support plate 70 has a cylinder ( It is preferable to be configured to be in contact with the rod of 71 so that the melt can be tapped by inclining the heating furnace 20 and the melting furnace 10 at a predetermined angle.

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According to the high-frequency induction heating apparatus using the thermal insulation furnace according to the present invention, by using the thermal insulation furnace capable of frequency induction heating to remove the gas and impurities contained in the melt through the gas supply means while maintaining the temperature of the melt supplied from the furnace After that, the melt is poured into the ladle, and then the melt is injected into the mold, thereby preventing the temperature of the melt from dropping and improving the quality of the melt injected into the mold.

In addition, by forming a protruding frame on the outer protective block of the gas supply means installed in the thermal furnace to minimize the entry of the melt through the refractory and the outer protective block to prevent the melt from flowing out of the thermal furnace, and also the melt There is an effect that can prevent the temperature drop.

In addition, the shape of the inner protective block of the gas supply means has a rhombic shape to minimize the coefficient of thermal expansion and increase the coupling force of the outer protective block and the inner protective block.

1 is a block diagram of a high frequency induction heating apparatus using a thermal insulation furnace according to the present invention,
Figure 2 is a perspective view of the melting furnace and the heating furnace extracted from Figure 1,
3 is a cross-sectional view of the melting furnace according to FIG.
4 is a cross-sectional view of the heating furnace according to FIG.
5 is a perspective view of the gas supply means extracted from FIG.
6 is a cross-sectional view of the gas supply means according to FIG.
7 to 9 is an operation of the high-frequency induction heating apparatus using the thermal insulation furnace according to the present invention.

Hereinafter, with reference to the accompanying drawings with respect to the high-frequency induction heating apparatus using a heat in accordance with the present invention will be described in detail.

1 is a block diagram of a high frequency induction heating apparatus using a heating furnace according to the present invention, Figure 2 is a perspective view of the melting furnace and the heating furnace extracted from Figure 1, Figure 3 is a cross-sectional view of the melting furnace according to FIG. 4 is a cross-sectional view of the heat retention furnace according to FIG. 2, FIG. 5 is a perspective view of the gas supply means extracted from FIG. 4, and FIG. 6 is a cross-sectional view of the gas supply means according to FIG. 5.

As shown in Figure 1 to 6, the present invention is a gas contained in the melt through the gas supply means 30 while maintaining the temperature of the melt supplied from the melting furnace using a high-temperature induction heating furnace 20 Removing impurities and then tapping the melt into the ladle 40, and then injecting the melt into the compound 60 can prevent the temperature of the melt from dropping and improve the quality of the melt injected into the compound 60. The present invention relates to a high frequency induction heating apparatus using a thermal insulation furnace having a structure.

The high frequency induction heating apparatus using such a heating furnace is composed of three parts, which is a melting furnace 10 for dissolving scrap iron, and an insulating furnace 20 for removing gas and impurities from the melt of the melting furnace 10 and The ladle 40 is configured to receive the melt of the thermal furnace 20 and inject the melt into the mold 60.

The melting furnace 10 is configured to dissolve the metal through the high frequency electromagnetic field of the high frequency induction coil 13 by the electromagnetic induction principle of the high frequency current.

The melting furnace 10 is disposed in a cylindrical shape inside the furnace 11, a support 12 disposed in the center of the melting furnace 10 while being spaced apart from the furnace 11, and an inner side of the support 12. The high frequency induction coil 13, the pushing block 15 disposed under the center of the high frequency induction coil 13, and the pushing block 15 are embedded and disposed inside the high frequency induction coil 13. It consists of the refractory body 14. At this time, the cooling water is circulated inside the high frequency induction coil 13.

The above configuration causes the heat generated when the high frequency induction coil 13 is heated to be generated only at the center of the high frequency induction coil 13, that is, inside the melting furnace 10, and the heat generated in the circumferential direction is circulated to the inside. Since the cooling water is reduced through, it is a configuration that can prevent damage to the peripheral device.

The melting furnace 10 can be installed in a number depending on the size of the thermal furnace 20, in the embodiment of the present invention is a structure in which two are installed.

Here, the melting furnace 10 is merely for melting the solid metal, when the solid metal is introduced, since the gas supply means 30 may cause damage due to the strike of the solid metal, the melting furnace 10 The gas supply means 30 is not installed.

The melting furnace 10 is supported by the support plate 70 on the upper outer side of the furnace body 11, by connecting the rod of the cylinder 71 to the bottom of the support plate 70 to enable the inclination can be tapping the melt It is configured to be.

On the other hand, it is a heat retention furnace 20 installed between two melting furnaces 10. The heat insulator 20 is also configured to be inclined by the rod of the cylinder 71, is positioned relatively lower than the melting furnace 10, the inclination of the melting furnace 10 inclined in the interior of the heat furnace 20 It is a structure that allows the melt of the furnace melting furnace 10 to be supplied.

The thermal furnace 20 is at least two times larger than the melting furnace 10 so as to mix the melt tapping from the melting furnace 10. At this time, the insulating furnace 20 is configured to be positioned at a lower position than the melting furnace 10 so that the melt can be smoothly supplied from the melting furnace 10.

In addition, since the thermal insulation furnace 20 is supplied with a melt and there is no impact due to the metal input, the gas supply means 30 is further installed on the inner bottom. The gas supply means 30 is for supplying nitrogen and argon gas for the removal of gas and impurities contained in the melt.

The heat retaining furnace 20 is a furnace 21, a support 22 disposed at the center in a state spaced apart from the furnace 21, and a high frequency induction coil disposed in a cylindrical shape inside the support 22. 23, a pushing block 25 disposed below the center of the high frequency induction coil 23, a gas supply means 30 disposed above the pushing block 25, and the gas supply means 30. It consists of a refractory material 24 disposed inside the high frequency induction coil 23 to expose the slit 311 formed on the upper surface of the.

That is, the thermal furnace 20, unlike the melting furnace 10, while maintaining the temperature of the melt melted from the melting furnace 10 through the high frequency induction coil 23, the slit 311 of the gas supply means 30 through preheating ) To prevent clogging and to remove impurities contained in the melt by receiving nitrogen or arcon gas from an externally provided nitrogen tank (not shown) or argon tank (not shown).

In addition, when the pushing block 25 replaces the end-of-life refractory 24 and the gas supply means 30, the pushing block 25 is pushed into the jacket or hydraulic cylinder to refractory 24 and the gas supply means 30. ) To remove.

The pushing block 25 is further formed with an opening 251 to expose the connector 34 provided in the gas supply means 30 in the lower center, the opening 251 of the jacket or hydraulic cylinder Can be used for connection purposes.

In addition, the gas supply means 30 is formed by forming a straight slit 311 through a predetermined interval through the rectangular nozzle block 31 for inducing gas and to protect the nozzle block 31 wrapped around Tapered lozenge-shaped inner protective block 32, outer protective block 33 for wrapping and protecting the inner protective block 32, and the lower portion to the outside to supply nitrogen or argon gas to the slit 311 Exposed to the outside of the block 33, the upper portion comprises a connector 34 connected to be in communication with the slit 311 of the nozzle block 31.

At this time, the inner protective block 32 is a metal containing alumina so that the space 35 is formed at the lower portion of the nozzle block 31 so that nitrogen or argon gas flowing into the slits 311 can be uniformly supplied to each of the slits 311. Exterior of the thin plate 321, the upper portion of the connector 34 is connected to the space portion 35.

The outer protective block 33 is a structure further including a protruding frame 331 protruding along the circumferential surface in order to prevent the melt supplied to the thermal furnace 20 is leaked. The protruding frame 331 minimizes the inflow of the melt through the refractory 24 and the outer protective block 33, and consequently prevents the melt from flowing out of the heat-retaining furnace 20, and at the same time the temperature of the melt It is the structure which can prevent a fall.

The inner protective block 32 has a tapered rhombic shape, which minimizes the coefficient of thermal expansion and increases the coupling force between the outer protective block 33 and the inner protective block 32, and also melts. It is to prevent.

On the other hand, the nozzle block 31 is coupled to the center of the inner protection block 32 to be protected, and has a structure in which the linear slit 311 penetrates at a predetermined interval to the upper surface.

The lower portion of the nozzle block 31 is formed with a space portion 35 by the metal thin plate 321 that is external to the inner protection block 32, the gas flowing through the connector 34 on the space portion 35 It may be uniformly supplied to each slit 311.

Meanwhile, the ladle 40 receives a melt from which impurities are removed from the thermal furnace 20 and injects a melt into the compound 60.

These ladles 40 are for moving the melt, and are towed by a crane (not shown) installed on the ceiling.

In addition, the front of the heat retention path 20 is a structure in which the bit 50 is dug inwardly formed. Therefore, the ladle 40 is configured to be pulled through the crane is positioned lower than the heat retainer 20 on the bit 50 to receive the melt of the heat retainer 20.

Therefore, since the ladle 40 is supplied with a melt in which the impurities are removed together with maintaining sufficient temperature in the heating furnace 20, it is possible to move quickly and improve the quality of the melt injected into the compound 60. A structure can be provided.

Hereinafter will be described briefly with respect to the operation of the high-frequency induction heating apparatus using the thermal insulation furnace according to the present invention.

7 to 9 is an operation of the high-frequency induction heating apparatus using the thermal insulation furnace according to the present invention.

First, a metal such as scrap iron is introduced into the melting furnace 10 to melt the metal through high frequency induction heating.

As shown in FIG. 7, when the melt of the melting furnace 10 is sufficiently dissolved, the melt is tapped into the heat retention furnace 20 between the melting furnace 10.

Here, the warming furnace 20 prevents the slit of the gas supply means from being blocked by the melt through sufficient preheating before receiving the melt. At this time, the melt supplied to the thermal furnace 20 is a liquid phase, and the breakage of the gas supply means is prevented by the melt supplied to the thermal furnace 20.

The melt supplied to the heating furnace 20 is to remove impurities contained in the melt by nitrogen or argon gas supplied by the gas supply means. At this time, even if nitrogen and argon gas are injected, it is possible to prevent the temperature of the melt from being lowered through the high frequency induction heating to the heating furnace 20 as well.

Finally, as shown in FIG. 8, the ladle 40 is placed on the bit 50 so as to receive the melt from which impurities are removed, and the ladle 40 is rapidly supplied by receiving the melt of the heating furnace 20. 9, the melt of the ladle 40 may be injected into the mold 60, thereby improving the quality of the product.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

10: melting furnace 11: roche 12: support
13: high frequency induction coil 14: refractory
15: Pushing Block
20: heath 21: Lhotse 22: support
23: high frequency induction coil 24: refractory
25: pushing block 251: opening
30: gas supply means 31: nozzle block 311: slit
32: inner protective block 321: metal sheet
33: outer protective block 331: protruding frame
34: connector 35: space part
40: Redo
50: bits
60: compound
70: support plate 71: cylinder

Claims (9)

In the high frequency induction heating apparatus,
Two melting furnaces 10 for melting scrap metal through high frequency induction heating,
Insulating furnace 20 for directly supplying the melt of each melting furnace 10 to remove the impurities and stabilize the temperature of the melt through high frequency induction heating to maintain the temperature, and
Including a ladle furnace (40) for receiving a melt from which the impurities are removed from the thermal furnace (20) and injecting the melt into the compound (60),
The heating furnace 20 is provided with a gas supply means 30 for injecting nitrogen and argon gas at the bottom for the stirring of the melt and removal of impurities,
The gas supply means 30 is buried so that the slit 311 for discharging nitrogen and argon gas may be exposed on the bottom surface of the thermal furnace 20, and a connector connected to an external nitrogen tank or an argon tank at the bottom thereof. 34 is configured to be exposed to the outside of the heating furnace 20,
The heating furnace 20 is disposed between the melting furnace 10 and disposed at a position relatively lower than the melting furnace 10 to receive the melt from the melting furnace 10,
The front of the heat retainer 20 further includes a bit 50 dug inwards, and the ladle 40 is positioned lower than the heat retainer 20 on the bit 50 to keep the heat retainer 20 A high frequency induction heating apparatus using a thermal insulation furnace, characterized in that configured to be supplied with the melt.
The method of claim 1,
The melting furnace 10 is disposed in a cylindrical shape inside the furnace 11, a support 12 disposed at the center of the melting furnace 10 in a state spaced apart from the furnace 11, and the inside of the support 12. A high frequency induction coil 13, a pushing block 15 disposed below the center of the high frequency induction coil 13, and a refractory disposed in the inside of the high frequency induction coil 13 by embedding the pushing block 15. High frequency induction heating apparatus using a thermal insulation furnace, characterized in that consisting of (14).
The method of claim 2,
The heat retaining furnace 20 is disposed in a cylindrical shape inside the support body 22, a support 22 disposed at the center of the melting furnace 10 in a state spaced apart from the furnace body 21, and the support 22. A high frequency induction coil 23, a pushing block 25 disposed below the center of the high frequency induction coil 23, a gas supply means 30 disposed above the pushing block 25, and the gas. High frequency induction heating apparatus using a thermal insulation furnace, characterized in that consisting of a refractory (24) disposed inside the high frequency induction coil (23) to expose the slit (311) formed on the upper surface of the supply means (30).
The method of claim 3, wherein
The pushing block 25 is a high-frequency induction heating apparatus using a thermal insulation furnace, characterized in that the opening 251 is further formed to expose the connector 34 of the gas supply means 30 in the center.
The method of claim 1,
The gas supply means 30 has a rectangular nozzle block 31 in which a straight slit 311 is formed at a predetermined interval to induce gas, and a tapered rhombus surrounding and protecting the nozzle block 31. An inner protective block 32 having a shape, an outer protective block 33 covering and protecting the inner protective block 32, and a lower portion of the outer protective block 33 to supply nitrogen or argon gas to the slit 311. Exposed to the outside, the upper portion includes a connector 34 connected to be in communication with the slit 311 of the nozzle block 31,
The inner protective block 32 is formed of a space 35 at the lower portion of the nozzle block 31 so that nitrogen or argon gas flowing into the slits 311 may be uniformly supplied to the metal thin plate 321. ) Is external, and the high frequency induction heating apparatus using the heat insulating furnace, characterized in that the upper portion of the connector 34 is connected to the space (35).
6. The method of claim 5,
The outer protective block 33 is a high-frequency induction heating apparatus using a thermal insulation furnace, characterized in that it further comprises a protruding frame 331 protruding along the circumferential surface to prevent the melt from leaking.
The method of claim 3, wherein
The heat retaining furnace 20 and the melting furnace 10 are supported by a support plate 70 on the upper outer side of the furnace bodies 11 and 21, and the support plate 70 is connected to the rod of the cylinder 71 at the bottom thereof to maintain the heat retaining furnace ( 20) and the high frequency induction heating apparatus using a heat insulator, characterized in that the melting furnace 10 is inclined at a predetermined angle so that the melt can be tapped.
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