KR101932729B1 - Induction heating apparatus and method for ingot homogenization using the same - Google Patents

Abstract

The present invention comprises: a crucible in which a space is formed therein to receive an ore for melting; and a furnace body formed with a mounting space on which the crucible is mounted, wherein a coil for induction heating of the crucible is installed to surround a circumference of the mounting space. The crucible enables first ingot that is a metal compound to be extracted by being inputted into an induction heating furnace in a state in which a dissolving agent introduced into the crucible together with the ore is mixed. In a state in which the dissolving agent introduced into the crucible together with the first ingot is mixed, a plurality of crucibles are inputted into the induction heating furnace to extract secondary ingot that is a metal compound.

Description

[0001] The present invention relates to an induction heating apparatus and an ingot homogenization method using the same,

More particularly, the present invention relates to an induction heating apparatus and a method of homogenizing an ingot using the same. More particularly, the present invention relates to an induction heating apparatus and a method of homogenizing an ingot using the same, And then homogenizing the extracted ingot by extracting the ingot secondarily. The present invention also relates to an ingot homogenizing method using the same.

Generally, many kinds of metals required in industry are extracted and applied by various methods. As a general metal extraction method, a mine having a large amount of metal components is developed, and various methods and processes A method of collecting the raw stones is used.

These gemstones contain both metallic and non-metallic components, where the non-metallic components are composed of silicon and quartz, while the metallic components contain a small amount of iron and other metal components.

That is, among the metal compounds of the metal component, metal components necessary for the industry, for example, gold, silver, iron and platinum group metals are included, and thus the ores containing such metal components are crushed, crushed, Sorting, magnetic force sorting, etc., and then dissolved in a heating furnace to be extracted in a desired form.

Although Korea has a general industrial structure that requires various metals, it is difficult to self-procure all necessary metals because various metals are not buried in the country.

However, if a small amount of rare or necessary metal is buried in the country's territory, it is considered possible to procure the metal necessary for the industry by extracting rare and necessary metals by using an efficient method.

For this purpose, in general, induction heating furnace is used to extract metal compounds by using electric magnetic field, that is, to extract a small amount of metal compounds contained in the raw stones. In order to obtain such metal compounds,

However, the ingot, which is an extracted metal compound, is difficult to process because the material itself is quenched by the induction heating furnace due to high temperature and cooling during the extraction process. In addition, the ingot is not homogenized as a whole, It may cause difficulty in the analysis and, as a result, it is difficult to commercialize the ingot itself.

An object of the present invention is to provide a process for producing a metal compound, which comprises grinding and crushing a raw ore which has undergone specific gravity screening or floating screening, mixing the raw stone with a dissolving agent, heating the ingot to firstly extract an ingot which is a metal compound, mixing the extracted ingot and the dissolving agent, And an ingot homogenizing method using the same. The present invention also provides an ingot homogenizing method using the same.

The induction heating apparatus according to the present invention is characterized in that a crucible in which a space is formed to accommodate a raw material for melting and a seating space is formed so that the crucible is seated and a coil for induction heating of the crucible surrounds the circumference of the seating space And the crucible is charged into the induction heating furnace in a state in which the dissolution agent introduced into the crucible together with the raw stone is mixed to extract the primary ingot which is a metal compound, And a plurality of second ingots, which are metal compounds, are injected into the induction heating furnace in a mixed state with the dissolver.

The rosette includes a first layer formed of a material containing graphite and a seating layer formed inside the seating space, a second layer surrounding the first layer and formed of a material including cowls, A third layer formed of a material including a mica, and a fourth layer formed of a material containing coil cement, the fourth layer being disposed to surround the second layer, Respectively.

An insole layer and a cowl layer for heat insulation are provided on the bottom surface of the rosette, and the cowl layer is positioned above the incerer layer.

The coil is connected to a cooling device for circulating cooling water for cooling the roasting body, and is formed in a hollow tube shape made of copper. Cooling water is supplied to the inside to cool the roasting body.

Herein, the heating current is controlled to a predetermined temperature range by controlling the current flowing through the coils, and when the temperature of the coils is higher than a preset temperature range, cooling water is supplied into the coils, Respectively.

Further, the induction heating apparatus according to the present invention is characterized in that it comprises a rotor cover for covering the opened upper surface of the rotor body, a motor provided on the upper side of the rotor cover for providing a rotating force, and a rotor connected to the motor through the rotor cover, Further comprising a stirring device including a stirring shaft for performing stirring.

Such a motor is installed so as to be able to move up and down with respect to the rotor cover so that the stirring shaft ascends and descends from the lower side of the rotor cover.

In addition, the rotor cover has a gas injection tube connected to the inside of the crucible, and argon gas is introduced into the crucible through the gas injection tube.

The dissolving agent is composed of silicon oxide (SiO ₂ ), calcium oxide (CaO), magnesium oxide (MgO), aluminum oxide (Al ₂ O ₃ ), sodium oxide (Na ₂ O), and potassium oxide (K ₂ O) do.

Further, the crucible is made of ceramic material or alumina material resistant to high temperature, and each of the crucibles is made of the same material or different materials.

Meanwhile, the ingot homogenizing method according to the present invention comprises the steps of crushing and crushing the crushed stone, and then introducing the raw stones that have undergone specific gravity or floating selection into the first crucible; and a step of injecting the dissolution agent into the first crucible, A first ingot extracting step of mixing the first crucible into the induction heating furnace and extracting the first ingot through a heating operation, a step of mixing the first ingot into the second crucible, And a second ingot extracting step of mixing the first ingot and the dissolving agent into the second crucible and injecting the second ingot into the induction heating furnace to extract the second ingot through a heating operation .

Here, the primary ingot extraction step and the second ingot extraction step, the silicon oxide (SiO _2), calcium (CaO), magnesium (MgO), alumina oxide (Al ₂ O _3), sodium (Na ₂ O oxidized ) And potassium oxide (K ₂ O).

In the second ingot extracting step, the second crucible is formed of a ceramic material or an alumina material in the same manner as the first crucible.

The present invention relates to a process for producing a metal-containing ingot by crushing and grinding, mixing the raw organs subjected to specific gravity or floating selection process with a dissolving agent and heating the molten stone to firstly extract an ingot which is a metal compound, mixing the extracted ingot and the dissolving agent, The ingot is extracted, and homogenization of the extracted ingot is achieved.

Accordingly, the present invention enables the ingot to be easily processed through homogenization of the ingot, thereby making it possible to commercialize the ingot.

1 is a schematic view showing the structure of a crucible and a rosette of an induction heating apparatus according to an embodiment of the present invention.
2 is a view showing the overall configuration of an induction heating apparatus according to an embodiment of the present invention.
3 is a view showing an agitating device of an induction heating apparatus according to an embodiment of the present invention.
4 is a view illustrating a process of manufacturing an ingot of an induction heating apparatus according to an embodiment of the present invention.
FIG. 5 is a view showing a process of manufacturing a plurality of crucibles of an induction heating apparatus according to an embodiment of the present invention and a primary ingot and a secondary ingot through the same.
FIG. 6 is a view sequentially showing an ingot homogenization method according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

It should be understood, however, that the present invention is not limited to the embodiments disclosed herein but 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, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a schematic view showing the structure of a crucible and a rosette of an induction heating apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing the overall configuration of an induction heating apparatus according to an embodiment of the present invention.

FIG. 3 is a view showing a stirring apparatus of an induction heating apparatus according to an embodiment of the present invention, FIG. 4 is a view showing a process of manufacturing an ingot of an induction heating apparatus according to an embodiment of the present invention, 5 is a view showing a process of manufacturing a plurality of crucibles of an induction heating apparatus according to an embodiment of the present invention and a primary ingot and a secondary ingot through the same.

As shown in FIG. 1, the induction heating apparatus 100 according to the present embodiment includes a crucible 110 and a rotor 130.

First, a space is formed in the crucible 110, and an ore A for melting is accommodated.

A seating space is formed in the roaster 130 so that the crucible 110 is seated and a coil C for induction heating of the crucible 110 surrounds the seating space.

The roaster 130 includes a first layer 131 made of graphite, a second layer 133 surrounding the first layer 131 and made of a material including a cowl, 133 and a fourth layer layer 137 formed of a material including coil cement and surrounding the third layer layer 135 and the third layer layer 135 formed of a material including mica.

In this case, the coil C may be positioned in the fourth layer 137, and the thickness ratio of the first layer 131 and the second layer 133 may be set to 5: 1 have.

The furnace body 130 uses an induction heating principle that melts the ore in the crucible 110 through electromagnetic induction by the current flowing in the coil C. [

The conductor 130 may be formed by adding a conductor to the crucible 110 so that the conductor is melted when the ore A is melted and the metal in the ore is easily separated by the difference in specific gravity.

The roaster 130 is composed of first to fourth layer layers 131, 133, 135 and 137, and each layer may be overlapped with each other to form a roaster body 130.

In addition, a cow layer 137a and an insole layer 137b may be provided on the bottom surface of the seating space of the roaster 130.

The cow layer 137a and the insole layer 137b correspond to refractory heat insulators and prevent heat generation to the outside, thereby improving the melting efficiency of the gemstone A.

Preferably, the cow layer 137a is located above the incerra layer 137b.

Although the cow layer 137a and the inlacer layer 137b are illustrated as being located in the fourth layer 137 in FIG. 1, the cow layer 137a and the inlacer layer 137b may be disposed on any one of the first to fourth layer layers 131, 133, 135, , Or the first to fourth layer layers 131, 133, 135, and 137, as shown in FIG.

The coil C is formed in a hollow tube made of copper and connected to a cooling device (not shown) for circulating cooling water for cooling the rotor 130, So that the furnace body 130 can be cooled.

The coil C is provided so as to surround the rotor 130 a plurality of times.

That is, both ends of the coil C are connected to each other to form a single tube. Both ends of the coil C are connected to a cooling device (not shown) so that cooling water provided in the cooling device (not shown) have.

Here, the cooling water plays a role of maintaining a predetermined temperature range after melting or melting while flowing inside the coil (C).

In other words, if the melting temperature of the rotor 130 is too low, melting may not be performed properly, while if it is too high, the metal and the nonmetal become completely melted and can not be extracted, so it is very important to maintain a constant temperature Do.

Therefore, it is possible to control the current to a predetermined temperature range by increasing the temperature by controlling the current flowing through the coil C, or by lowering the temperature by flowing cooling water into the inside of the coil C.

Preferably, a control unit (not shown) is provided to control the current flowing through the coil C to control the heating temperature of the furnace body 130 to a predetermined temperature range. If the temperature of the furnace body 130 exceeds a predetermined temperature The control unit (not shown) may control the cooling water to be supplied to the inside of the coil C and maintain the temperature within a predetermined temperature range.

More preferably, the temperature range of the heating temperature controlled by the control unit (not shown) may be set between about 2100 and 2300 ° C.

The frequency generated by the coil C is determined by the penetration depth of the material to be melted and the inner diameter of the crucible 110. Experimentally, the optimum frequency in the high frequency melting is lower than the quenching, The frequency at which the depth becomes 12.5% (10 to 20%) of the diameter of the crucible 110 can be an appropriate frequency.

2, a rotor cover 141 for covering the open upper surface of the crucible 110 is provided on the upper side of the rotor 130, and coil cements (for example, 143 may be further provided along the periphery of the rotor cover 141. [

In addition, the induction heating apparatus 100 according to the present embodiment includes a motor M provided on the upper side of the rotor cover 141 to provide a rotational force, a motor M connected to the rotor cover 141 through the rotor cover 141, And an agitating device 140 including an agitating shaft 145 for agitating the agitating device 140. [

The stirring shaft 145 may be provided with a blade 145a for stirring, and the shape of the blade 145a may be variously applied.

3 (a) and 3 (b), the motor M is provided so as to be able to move up and down relative to the rotor cover 141, so that the stirring shaft 145 is located below the rotor cover 141 And is configured to be able to ascend and descend.

That is, since the motor M can be easily damaged by the heat transmitted to the rotor cover 141, the motor M can be moved so as to approach the rotor cover 141 only at the time of necessity of agitation so that stirring can be performed.

Here, although the elevating structure of the motor M is not shown in the drawing, it is apparent that various methods such as a lifting structure using a thread structure and a lifting structure using an actuator can be applied.

A gas injection pipe 147 connected to the inside of the crucible 110 may be provided in the rotor cover 141. An argon gas may be introduced into the crucible 110 through the gas injection pipe 147 .

The argon gas is used to prevent the oxidation of the crucible 110 and increases the durability of the crucible 110. The argon gas is supplied to the control unit (Not shown) to prevent the crucible 110 from being oxidized.

In order to facilitate the separation of the metal mineral in the gemstone A during the melting process of the gemstones A, the dissolver B may enter the gemstones A together.

Here, the dissolving agent (B) is a silicon oxide (SiO _2), calcium (CaO), magnesium (MgO), aluminum (Al ₂ O _3), sodium (Na ₂ O), potassium (K ₂ O) oxide oxide oxide .

For example, the dissolver (B) may comprise from 25 to 35% by weight of potassium oxide, from 5 to 10% by weight of magnesium oxide, from 45 to 55% by weight of silicon oxide and from 7 to 15% by weight of aluminum oxide, The composition ratio of the solubilizing agent (B) is only an example of the platinum group metal, and it depends on the gemstones.

The dissolver B removes impurities in the melting process, accelerates the separation and oxidation of the non-metal and the metal, and reduces the metal components into a single crystal by reduction. .

In addition, a reducing agent (B ') may be added in addition to the solubilizing agent (B), and the reducing agent (B') may be a material containing a graphite component such as coke.

The support members 150 and 150 'and the rotor 130 are connected to each other by the rotation center shaft 153 to be rotatable about the rotation center axis 153. The support members 150 and 150' 153 are rotatably coupled to each other.

On the other hand, the raw stone A melted in the roaster 130 and discharged to the outside can be operated by the rotation of the rotation center shaft 153, that is, the rotation handle 157, The cooling crucible 200 is poured into the cooling crucible 200 and cooled so that the ingot can be solidified and the cooling crucible 200 is cooled through the discharge groove 130 ' The molten gemstones A may be discharged.

As shown in FIG. 4, the process of generating the ingot according to the present embodiment will be described as follows.

First, as shown in FIG. 4A, the raw stone A, the dissolving agent B, the reducing agent B 'and the like to be melted are put into the crucible 110, and a control unit (not shown) When the induction heating is performed on the body 130 for a predetermined time at a predetermined temperature, as shown in FIG. 5 (b), the raw stones A, the dissolver B and the reducing agent B ' .

At this time, if the temperature for controlling the predetermined temperature becomes too high, the controller (not shown) controls the cooling water to flow through the coil C to lower the temperature to a predetermined temperature. If the temperature is lowered, And the temperature thereof is raised.

In addition, during the melting process, the argon gas is always injected through the gas injection pipe 147 to prevent the crucible 110 from being oxidized.

In this state, when the molten raw stones A are transferred to the cooling crucible 200 by flowing through the rotors 130 through the rotation of the rotary handle 157 and then cooled, As a result, the metal ingot is entangled with the inside of the nonmetallic mineral (D). Then, the ingot is decomposed and the first ingot (10) can be extracted.

5, the crucible 110 according to the present embodiment is configured to supply power to the roofer 130 in a state where the dissolver B inserted therein together with the gemstone A is mixed, that is, So that the primary ingot 10, which is a metal compound, is injected into the induction heating furnace while being mixed with the solute B injected into the ingot 10 together with the primary ingot 10, A plurality of the ingots (110, 120) are provided to extract the ingots (10).

The crucible for extracting the primary ingot 10 is defined as the first crucible 110 and the crucible for extracting the other crucible, that is, the secondary ingot 20, is defined as the second crucible 120 .

The rosette 130 on which the second crucible 120 is mounted is the same in construction and shape as the rosette 130 on which the first crucible 110 is placed, and a detailed description thereof will be omitted.

The first crucible 110 may be made of a ceramic material and the second crucible 120 may be made of the same material as the first crucible 110 and may be made of an alumina material having high heat resistance.

Generally, grinding, crushing, non-pulverizing and floating grinding are mixed with a dissolving agent and put into an induction furnace. The grinding stone (A) is dissolved by the heating action of the induction heating furnace, By the generated alternating magnetic flux, the molten material in the crucible 110 by induction heating is stirred.

At this time, the nonmetal component and the metal component contained in the gemstone (A), which is a dissolving material, are separated by the specific gravity and component difference in the stirring process by the stirring operation of the induction heating furnace.

Here, the non-metallic components are located at the upper portion of the induction heating furnace due to the relatively low specific gravity, and the metallic components are located at the lower portion with a relatively high specific gravity. Therefore, after the operation of the induction heating furnace is stopped, The primary ingot 10, which is a metal compound, can be easily extracted by taking out the material outside.

However, since the primary ingot 10 is in a high-temperature state while being heated by an induction heating furnace, the quenching is carried out while cooling the steel from the crucible while being extracted from the crucible. Therefore, the primary ingot 10 is quenched, And the metallic components of the primary ingot 10 itself are not homogenized and it is difficult to commercialize the ingot itself.

Therefore, in the present embodiment, the first ingot 10 extracted from the first crucible 110 is supplied to the second crucible 120 together with the dissolving agent (B) by providing the first crucible 110 and the second crucible 120, And the mixture is re-heated in an induction heating furnace to extract the second ingot 20, so that the ingot itself can be loosened so as to facilitate processing, and homogenization of the components of the extracted ingot is also possible can do.

Accordingly, the ingot can be easily commercialized through homogenization of the extracted ingot, thereby making it possible to commercialize the ingot.

Hereinafter, FIG. 6 is a view sequentially showing an ingot homogenization method according to another embodiment of the present invention.

As shown in FIG. 6, the ingot homogenization method using the induction heating apparatus according to the present embodiment will be sequentially described below.

First, crushed and ground, and the raw stone A having undergone specific graining or floating sorting process is introduced into the first crucible 110 (S100).

At this time, the gemstone (A) is dissolved together with the dissolving agent (B) by the heating action of the induction heating furnace, and the dissolved substance in the first crucible (110) Here, the nonmetal component and the metal component contained in the gemstone A, which is a dissolving material, are separated by the specific gravity and the component difference in the stirring process due to the self-stirring activity of the induction heating furnace.

These nonmetallic components are located at the upper part of the induction heating furnace due to their relatively low specific gravity and the metallic components are located at the lower part with a relatively high specific gravity. Therefore, after stopping the operation of the induction heating furnace, Is taken out to the freezing crucible (200) and the primary ingot (10), which is a metal compound, can be easily extracted (S200).

Thereafter, the extracted primary ingot 10 is introduced into the second crucible 120 and dissolved in the same way as the dissolver B injected into the first crucible 110 into the interior of the second crucible 120, The first ingot 10 and the dissolving agent B are mixed and the second crucible 120 is introduced into the induction heating furnace to extract the second ingot 20 through the heating operation S300.

In general, the primary ingot 10 extracted from the first crucible 110 is heated to a high temperature while being heated by an induction heating furnace, and then cooled while coming out of the cooling crucible 200 in the extraction process to be quenched The primary ingot 10 is quenched, the surface strength is so high that processing is difficult, and the metallic components of the primary ingot 10 itself are not homogenized, which makes it difficult to commercialize the ingot itself. It is to solve the problem.

Accordingly, in this embodiment, the first crucible 110 and the second crucible 120 are provided to solve this problem, and the primary ingot 10 extracted from the first crucible 110 is melted with the dissolver B And the mixture is charged into the second crucible 120 and mixed together. The mixture is introduced into an induction furnace and reheated to extract the second ingot 20, whereby the ingot itself can be loosened so as to facilitate the processing. ≪ / RTI > can also be made possible.

Meanwhile, in the first ingot extracting step (S200) and the second ingot extracting step (S300), the molten steel (A) and the first ingot (10) are melted together into the first crucible (110) and the second crucible (B) is and eliminate impurities from the melting process, and facilitate the separation and oxidation of the base metal and a metal oxide, calcium oxide silicon (SiO ₂₎ so as to reduce the metallic those with a single crystal by reduction, oxidation (CaO), It is preferably composed of magnesium oxide (MgO), aluminum oxide (Al ₂ O ₃ ), sodium oxide (Na ₂ O), and potassium oxide (K ₂ O).

For example, the dissolver (B) may comprise from 25 to 35% by weight of potassium oxide, from 5 to 10% by weight of magnesium oxide, from 45 to 55% by weight of silicon oxide and from 7 to 15% by weight of aluminum oxide, The composition ratio of the solubilizing agent (B) is only an example of the platinum group metal, and it depends on the gemstones.

The second crucible 120 for extracting the second ingot 20 may be formed of a ceramic material having high heat resistance or an alumina material having the same function as the first crucible 110.

The present invention relates to a process for producing a metal-containing ingot by crushing and grinding, mixing the raw organs subjected to specific gravity or floating selection process with a dissolving agent and heating the molten stone to firstly extract an ingot which is a metal compound, mixing the extracted ingot and the dissolving agent, The ingot is extracted, and homogenization of the extracted ingot is achieved.

Accordingly, the present invention enables the ingot to be easily processed through homogenization of the ingot, thereby making it possible to commercialize the ingot.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many modifications may be made thereto, It will be understood that all or some of the elements (s) may be optionally constructed in combination. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: primary ingot 20: secondary ingot
100: induction heating apparatus 110: first crucible
120: second crucible 130:
131: first layer layer 133: second layer layer
135: third layer layer 137: fourth layer layer
137a: cow layer 137b:
140: stirrer 141: roll body cover
143: Coil cement 145: Stirring shaft
147: gas injection pipe 150, 150 ': supporting member
200: Freezing crucible A: Ore
B: Solubilizer B ': Reducing agent
C: Coil D: Non-metallic mineral

Claims (13)

A crucible having a space formed therein to receive a raw material for melting; And
And a furnace in which a seating space is formed so that the crucible is seated and a coil for induction heating of the crucible is installed to surround the circumference of the seating space,
In the crucible,
The molten metal introduced into the induction heating furnace is mixed with the raw stones so that the primary ingot, which is a metal compound, is extracted, and the molten metal introduced into the induction furnace together with the primary ingot is mixed with the induction heating furnace And a plurality of secondary ingots, which are metal compounds, are extracted,
A ruthenium cover covering the opened upper surface of the rosette;
A motor provided on an upper side of the rotor cover to provide a rotational force; And
Further comprising: a stirring device connected to the motor and the rotor cover and including a stirring shaft for performing stirring by rotation,
Wherein the motor is provided so as to be able to move up and down only at a time when stirring is required with respect to the rotor cover so that the stirring shaft is moved up and down from the lower side of the rotor cover,
The roto-
And a gas injection pipe connected to the inside of the crucible, wherein argon gas is introduced into the crucible through the gas injection pipe,
The rotoce is installed at a position spaced apart from the bottom surface by the supporting member,
Wherein the support member and the rooce are connected by a rotation center shaft, the rooce is rotatably coupled with respect to the rotation center axis,
Wherein the rotor is formed such that the rotation center shaft is rotated by the operation of the rotation handle to discharge the raw material melted in the cooling crucible through the discharge groove provided at one side,
In the crucible,
Characterized in that it is made of ceramic material or alumina material resistant to high temperature and is formed of the same or different materials.
The method according to claim 1,
Preferably,
A first layer formed of a material containing graphite and having a seating space formed therein;
A second layer layer surrounding the first layer and being formed of a material including a cowl;
A third layer disposed to surround the second layer and formed of a material including a mica; And
And a fourth layer layer surrounding the third layer layer, the fourth layer being formed of a material containing coil cement, the coil layer being disposed on the fourth layer layer.
The method according to claim 1,
An insole layer and a cowl layer for heat insulation are provided on the bottom surface of the roto body,
And the cowl layer is positioned above the incerer layer.
The method according to claim 1,
Wherein:
And a cooler connected to a cooling device for circulating cooling water for cooling the roasting body, wherein the hollow is formed in a hollow tube made of copper, and cooling water is supplied to the inside to cool the roasting body. Lt; / RTI >
5. The method of claim 4,
And controlling the current flowing through the coil to control the heating temperature of the roasting body to a predetermined temperature range. When the temperature of the roasting body is higher than a predetermined temperature range, cooling water is supplied to the inside of the coil to be maintained within a predetermined temperature range And said heating means.
delete delete delete The method according to claim 1,
Preferably,
(SiO ₂ ), calcium oxide (CaO), magnesium oxide (MgO), aluminum oxide (Al ₂ O ₃ ), sodium oxide (Na ₂ O) and potassium oxide (K ₂ O) Induction heating apparatus.
delete A step of putting a raw material having undergone crushing and crushing and then subjected to specific gravity screening or floating screening into a first crucible;
A primary ingot extracting step of mixing the raw ore and the dissolving agent into the first crucible to mix the raw ore and the first crucible into an induction heating furnace to extract a primary ingot through a heating operation; And
The first ingot is charged into the second crucible and the dissolving agent is introduced into the second crucible to mix the first ingot and the dissolving agent and the second crucible is charged into the induction heating furnace And a second ingot extracting step of extracting the second ingot to make homogenization of the metallic components of the second ingot,
The secondary ingot extracting step may include:
Wherein the second crucible is formed of a ceramic material or an alumina material in the same manner as the first crucible.
The method of claim 11,
In the primary ingot extracting step and the secondary ingot extracting step,
The above-mentioned solubilizer composed of silicon oxide (SiO ₂ ), calcium oxide (CaO), magnesium oxide (MgO), aluminum oxide (Al ₂ O ₃ ), sodium oxide (Na ₂ O) and potassium oxide (K ₂ O) Wherein the ingot is homogenized.
delete

Images