KR101446933B1 - Furnace using a magnetron - Google Patents

Abstract

The present invention relates to a multi-purpose consecutive furnace using a magnetron. In particular, the workability and safety are ensured as there is no outflow of gas generated during the dissolution of a mineral, and the productivity and production efficiency are improved as consecutive dissolution is possible. Heat loss is reduced, thus saving energy, and the production costs of a product is also reduced. A dissolution rate and the temperature can be adjusted without a restriction by adjusting the tilt angle of a chamber or the number of operation of the magnetron, thereby significantly improving marketability and reliability associated with operating the furnace.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a multi-purpose continuous melting furnace using a magnetron,

The present invention relates to a multipurpose continuous melting furnace using a magnetron, and more specifically, a plurality of magnetrons are installed outside a chamber having a cylindrical or polygonal shape with a hollow portion by an inner heat insulating pipe at predetermined intervals , And a plurality of induction heating type black silicon carbide (Black SiC) heating pipes heated to a high temperature by a microwave (microwave) to penetrate the central portion of the heat insulating tube in the chamber are installed to be inclined within a predetermined angle range , A hopper capable of continuously injecting various mineral powders (slag or the like), glass or salt into the upper part of the heat insulating tube, and a melt discharge opening provided with a valve in the bottom opening part to induce the microwave irradiated from the magnetron to induction heating Type carbon-carbon heating pipes in the shortest time through indirect heating , So that various mineral powders, glass, or salt, etc., which pass through the induction heating type carbon-silicon heating tube can be continuously discharged as a dissolution liquid, thereby ensuring workability and safety and enabling continuous dissolution It can increase the productivity and production efficiency significantly, and it can reduce the energy cost and the production cost because there is no heat loss. It is also possible to freely adjust the melting speed by controlling the inclination angle of the chamber or controlling the driving number of the magnetrons .

In general, a melting furnace is a furnace manufactured for melting and melting a solid material at a melting point or more. There are various types and types of furnaces, It can be divided into four types such as furnace, electric furnace and furnace furnace.

In this case, the reflow furnace is easy to adjust the furnace component used for the smelting of metal and the melting process for manufacturing alloy, and the fuel is used as coal, gas or oil, and does not come into direct contact with the heated product, heats the metal or ore with flame, The flat furnace is representative of this type.

A crucible furnace is a relatively simple furnace used for melting non-ferrous alloys, steel and glass. It is made of graphite or cast iron and divided into coke, gas and heavy oil according to the fuel used. And is heated and melted from the outside, so that the oxidation of the metal is small and the impregnation of the impurities due to the fuel and air blowing is reduced and a high-quality molten body can be obtained.

In addition, the electric furnace is a furnace which does not use fuel and is heated and melted by electrothermal. It does not need a combustion chamber and combustion air, there is no loss of heat due to exhaust gas, temperature control is easy, There are arcs using heat, arcs using high heat generated by arc, induction furnaces for inducing current in a vessel and heating.

In addition, a charcoal furnace is an upright furnace in which refractory clay is laid by refractory bricks inside a cylinder made of steel plate. It is also called a cupola. It is usually used for melting cast iron. There are two kinds of hot and cold type Since the heat efficiency is good, and it is economical and the dissolving time is fast, it is advantageous to make a large amount of waste continuously.

On the other hand, in recent years, various melting furnaces and dryers using an induction furnace, such as a magnetron, which induces a current in a container or a heating device among the above melting furnaces have been developed and widely used in various fields.

For example, in Korean Patent Laid-Open Publication No. 10-2014-0010559, "a device and a method for processing a salt using a microwave or carbon nano heater, and a salt prepared using the same" are proposed.

In one embodiment of the present invention, there is provided a salt processing apparatus using a microwave, comprising: a body case; A heating chamber mounted in the body case to apply heat thereto; A heating tube which is disposed transversely to the central portion in the heating chamber and is made of a metallic material; A heating element which surrounds the outer surface of the heating tube and conducts the heated heat; A heat insulating material which surrounds the heating body to prevent the heat transmitted through the microwave and being heated from flowing out to the outside; A plurality of magnetrons installed on upper and lower surfaces of the body case to guide microwaves to the heating tube inside the body case through a waveguide to radiate the microwaves; A salt injecting means installed above one side of the body case for injecting salt into the heating tube; And discharging means for discharging the salt discharged from the heating tube while surrounding the other side of the body case.

In another embodiment, the body case is rectangular or rectangular; A heating chamber forming an interior of the body case; An air inlet and a gas outlet respectively installed from the left and right sides of the body case to the heating chamber; A plurality of magnetrons installed on the body case to radiate microwaves toward the heating chamber through waveguides; A crucible provided on the bottom surface of the heating chamber and composed of a plurality of quadrangular SiC-based materials arranged in a plurality of openings so as to contain and process the salt; And a plurality of nano carbon heaters installed to emit far-infrared rays from the upper surface in the heating chamber toward the crucible.

In addition, a "dissolving device" is also disclosed in Japanese Patent Application Laid-Open No. 10-1227382, which is a melting furnace in which a molten material is charged and formed into a blast furnace; And a microwave application type heating unit provided in the melting furnace and provided to melt the molten material generated through the applied microwave to generate molten solder, A gas curtain forming means provided for the gas curtain; And gate means connected to a discharge port provided at a lower portion of the furnace to control discharge of the melted material; And at least a gate means.

However, most of the dissolution apparatuses have such a complicated structure that the melting furnace itself is fixed in the horizontal direction or the vertical direction, so that the inclination angle of the melting furnace can not be controlled depending on the object to be melted, In addition, since it is impossible to control the melting temperature and the production rate of the product, the yield is low, the production efficiency is lowered, the workability and safety can not be ensured, the heat cost is lost, And the like.

Particularly, most of conventional melting furnaces are manufactured and used only for melting a specific material, so that various mineral powders having different melting temperatures (for example, when a metal is smelted in a furnace, components other than a target metal are combined with a flux to separate (A melting point of 1,000 to 1,100 ° C) or a salt (a melting point of 800 to 900 ° C), which is the melting point of the melting point of 1,400 ° C or more, (I. E., Lack of compatibility of the melting furnaces). ≪ / RTI >

Korean Patent Publication No. 10-2012-0052780 (May 24, 2012) Korean Patent Publication No. 10-2014-0010559 (Jan. 27, 2014) Korean Registered Patent No. 10-1227382 (Jan. 23, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and it is an object of the present invention to provide a microwave oven comprising a plurality of magnetrons arranged at predetermined intervals outside a cylindrical or polygonal chamber having a hollow portion by a heat- A plurality of induction heating type black silicon carbide (Black SiC) heating pipes which are heated at a high temperature by a microwave (microwave (for example, 2,450 MHz / sec)) to penetrate the heat insulating tube, A chamber having a plurality of magnetrons and induction heating type carbon-silicon heating tubes is installed on the melting furnace support so as to be able to be inclined within a predetermined angle range, and various mineral powders (slag Etc.), a hopper capable of continuously injecting glass or salt, and a valve and a heater for preventing fusion of the molten liquid (Eg, 900 to 1,500 ° C.) within the shortest time through an indirect heating method in which a microwave irradiated from a magnetron is applied to induction heating type carbon-silicon heating tubes by providing a melt outlet provided with the induction heating Type silicon carbide heating pipe can be continuously discharged as a dissolving liquid by using various mineral powders, glass, or salt passing through the inside of the silicon carbide heating tube. Therefore, workability and safety can be ensured because there is no outflow of gas generated during dissolution of various minerals It is possible to continuously improve the productivity and production efficiency, and it is possible to reduce the production cost of the product as well as increase the energy saving effect because there is little heat loss, and it is possible to control the inclination angle of the chamber, The speed and temperature of dissolution can be adjusted freely by controlling the number of drives, and thus the performance of the melting furnace itself is driven. The present invention provides a multi-use continuous melting furnace using the magnetron.

Another object of the present invention is to provide a multipurpose continuous melting furnace using a magnetron which is harmless to the human body by preventing the outflow of electromagnetic waves or microwaves due to the operation of the melting furnace.

It is another object of the present invention to provide a method for producing a silicon carbide heating tube, which comprises forming a molybdenum coating layer on the inner surface of an induction heating type silicon carbide heating tube to induce chemical reaction with chlorine (Cl ₂ ) generated when molten salt is introduced into the molten salt, There is provided a multi-use continuous melting furnace using a magnetron capable of preventing the heating type silicon carbide heating pipe from being damaged and also capable of significantly extending the life of the induction heating type silicon carbide heating pipe itself.

According to an aspect of the present invention, there is provided a method of manufacturing a magnetron, the method comprising: forming a cylindrical or polygonal shape having a predetermined diameter, length, and volume using a metal plate; forming a plurality of magnetron- The lower opening having a closed configuration; A plurality of supporting members having a cylindrical or polygonal shape corresponding to the shape of the chamber and partially protruding upward and downward and inserted at a predetermined interval in a state of being inserted into the chamber, The microwave emitted through the waveguide of the magnetrons passes through the induction heating type silicon carbide heating tube and minimizes the heat transferred from the induction heating silicon carbide heating tube to the chamber side; And a microwave generator for generating microwaves of a predetermined frequency by applying a high voltage to the inner surface of the chamber and the hollow of the outer surface of the heat insulating tube when a high voltage is applied from a high voltage transformer of the magnetron driving part, A plurality of magnetrons for induction heating silicon carbide heating tubes to be induction heated to a predetermined temperature; Having a specific gravity of 3.12 and a melting point of 2,600 to 2,800 ° C. and being extruded to have a predetermined diameter and length using black silicon carbide (Black SiC) having a hardness higher than that of diamond, A plurality of induction heating type silicon carbide heating tubes which are heated by induction heating when microwaves of a predetermined band are emitted from the magnetrons and which are heated in a predetermined temperature range and melted to be heated as a powder raw material passing through each of the magnetrons; An upper and a lower heat insulating plate installed at upper and lower ends of the heat insulating tube to prevent the raw material and the melt from flowing into the space formed between the induction heating silicon carbide heating tubes in the heat insulating tube; A magnetron driving unit for applying a high voltage to the magnetrons when the power is supplied to allow the magnetrons to oscillate at a high frequency; A hopper which is provided on a top of the heat insulating tube and uniformly supplies an object to be heated, which is a raw material of the powder, into the induction heating type silicon carbide heating tubes; A melt discharge port provided with a manual or automatic valve and extending integrally from the bottom of the heat insulating tube so as to form a slit so as to control the discharge of the molten object discharged through each of the induction heating type silicon carbide heating pipes; And a melting furnace which is fixedly installed on the ground and fixes the melting furnace to be inclined at a predetermined angle.

In addition, a hinge shaft is provided at a contact portion between the melting furnace support and the outer surface of the chamber, and between the melting furnace support and one side of the chamber, the melting furnace operator passes the induction heating type silicon carbide heating pipes through the melting furnace, And the inclination angle of the melting furnace itself may be adjusted to adjust the passing speed of the raw material passing through the induction heating type silicon carbide heating pipes.

In this case, the inclination angle adjusting means may include a hydraulic cylinder disposed between one side of the melting column and one side of the chamber.

Further, the chamber may further include a chamber pressure check valve that automatically opens when the air in the hollow portion expands to a predetermined pressure or higher by heat to lower the pressure in the chamber, and prevents leakage of the microwave to the inlet of the chamber pressure check valve. A mesh net of 3 mm or less mesh is provided.

Further, the melt outlet port is further provided with a melt outlet port pressure check valve that automatically opens when the internal pressure expands to a predetermined pressure or more, thereby lowering the pressure in the melt outlet.

In addition, a temperature sensor for detecting the temperature of the molten raw material in real time and transmitting the detected temperature to the magnetron driving unit is further provided inside the melt discharge port, and a heater for preventing the coagulation of the molten liquid is further provided on the outer surface of the melt discharge port, And when the temperature detected through the temperature sensor falls below a predetermined temperature, the heater for preventing the coagulation of the molten alloy is operated to prevent the molten liquid in the molten liquid discharge port from solidifying.

The heat insulating tube, the support, and the heat insulating plate for the upper and lower caps are formed of an alumina fiber board having a high melting point of 1,000 to 1,800 ° C. and a density (kg / m 3) of 300 to 600 .

The input terminal of the magnetron driving unit is further provided with a heating temperature setting key of a silicon carbide heating pipe and a setting key of operating numbers of magnetrons.

The inner surface of the induction heating type silicon carbide heating tube is further formed with a molybdenum coating layer having a melting point of 2,450 to 2,620 DEG C and a density of 10.2 g / cm < 3 >.

As described above, according to the multi-function continuous melting furnace using the magnetron of the present invention, a plurality of magnetrons are provided outside the chamber of a cylindrical or polygonal shape having a hollow portion by a heat insulating tube provided inside, A plurality of induction heating type black silicon carbide (Black SiC) heating pipes which are heated at a high temperature by a microwave (microwave (for example, 2,450 MHz / sec)) to penetrate the heat insulating tube, A chamber having a plurality of magnetrons and induction heating type carbon-silicon heating tubes is installed on the melting furnace so as to be inclined within a predetermined angle range, and various mineral powders (such as slag) and the like A hopper capable of continuously injecting glass or salt or the like is provided, and a valve and a molten liquid (Eg, 900 to 1,500 ° C.) in the shortest time through an indirect heating method in which a microwave irradiated from a magnetron is applied to induction heating type carbon-silicon heating tubes by providing a melt outlet provided with a heater Various kinds of mineral powders, glass or salt that pass through the induction heating type carbon-silicon heating tube can be continuously discharged as a dissolving solution, so that there is no outflow of gas generated when dissolving various minerals, thereby ensuring workability and safety And continuous dissolution is possible, which can greatly improve productivity and production efficiency.

In addition, since there is little heat loss, it is possible to increase the energy saving effect, reduce the production cost of the product, and adjust the inclination angle of the chamber or the driving number of the magnetron to freely adjust the dissolution speed and temperature, It is possible to greatly improve the reliability of its own merchantability and operation.

In addition, by forming a molybdenum coating layer on the inner surface of the induction heating type silicon carbide heating pipe, the chemical reaction with chlorine (Cl ₂ ) generated when the salt is introduced into the molten salt by introducing salt into the object to be heated, The heating pipe can be prevented from being damaged, and the lifetime of the induction heating type silicon carbide heating pipe itself can be greatly extended.

1 is a partially exploded front perspective view of a multi-function continuous melting furnace to which the present invention is applied.
2 is a front sectional view of a multipurpose continuous melting furnace to which the present invention is applied.
3 is a side cross-sectional view of a versatile continuous melting furnace to which the present invention is applied.
Fig. 4 is an installation view of a multi-function continuous melting furnace to which the present invention is applied. Fig.

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

FIG. 1 is a partially exploded front perspective view of a multipurpose continuous melting furnace to which the present invention is applied, FIG. 2 is a front sectional view of a multipurpose continuous melting furnace to which the present invention is applied, and FIG. 3 is a side sectional view of a multipurpose continuous melting furnace to which the present invention is applied. And FIG. 4 shows an installation state of the multi-function continuous melting furnace to which the present invention is applied.

According to the present invention, there is provided a multi-

A plurality of magnetron mounting holes 1a are formed at predetermined intervals on the outer side, and a plurality of magnetron mounting holes 1a are formed on the outer side of the magnetron mounting holes 1a, An enclosed chamber (1);

(3) having a cylindrical or polygonal shape corresponding to the shape of the chamber (1) and partially protruding upward and downward and being installed at a predetermined interval in a state of being inserted into the chamber (1) The microwave that is fixedly installed in the chamber 1 to form the hollow portion 1b and is emitted through the waveguide 4a of the magnetron 4 and then diffracted in the hollow portion 1b is introduced into the induction heating type silicon carbide heating tube 5) and minimizes the transfer of heat generated in the induction heating type silicon carbide heating pipe 5 to the chamber 1;

When the high voltage is applied from the high voltage transformer of the magnetron driving unit 8 to the chamber 1, the high frequency is oscillated and the chamber 1 is opened, A plurality of magnetrons 4 for induction heating the induction heating type silicon carbide heating tubes 5 to a predetermined temperature by discharging microwaves of a predetermined band to the inner surface of the heat insulating tube 2 and the hollow portion 1b of the outer surface of the heat insulating tube 2, ;

And has a specific gravity of 3.12, a melting point of 2,600 to 2,800 ° C, and a shape of extruded to have a predetermined diameter and length by using black silicon carbide (Black SiC) having a hardness higher than that of diamond and filling the inside of the heat insulating tube 2 A plurality of induction heating type carbides that induce heating when the microwaves of a predetermined band are emitted from the magnetrons 4 in a state where the microwaves are emitted from the magnetrons 4 and which are heated within a predetermined temperature range and are melted, A silicon heating pipe 5;

The upper and lower end portions of the heat insulating tube 2 are respectively provided at the upper and lower ends of the heat insulating tube 2 so as to prevent the raw material and the melt from flowing into the space portion formed between the induction heating silicon carbide heating tubes 5 in the heat insulating tube 2. [ Insulating plates (6) and (7);

A magnetron driving unit 8 for applying a high voltage to the magnetrons 4 when the power is supplied to cause the magnetrons to oscillate at a high frequency;

And a screw 9b driven by a motor 9a is provided in the inside of the induction heating type silicon carbide heating pipe 5 and an object to be heated, The hopper 9 is fed evenly;

Heating and discharging through the respective induction heating type silicon carbide heating pipes 5, which are provided integrally with the passive or automatic valve 10a and integrally extended from the bottom of the heat insulating tube 2 in a scooping manner, A melt outlet (10) for controlling the discharge of water;

And a melting furnace support (11) fixedly installed on the ground to fix and install the melting furnace at a predetermined angle.

A hinge shaft 12a is provided at a contact portion between the melting furnace support 11 and the outer surface of the chamber 1. Between the melting furnace support 11 and one side of the chamber 1, Type silicon carbide heating pipes 5 to control the passing speed of the raw material passing through the induction heating type silicon carbide heating pipes 5 in consideration of the characteristics of the raw materials to be melted and the number of operation of the magnetrons 4, And an inclination angle adjusting means (12) for adjusting the inclination angle of the inclination angle.

The inclination angle adjusting means 12 may include a hydraulic cylinder 12b disposed between one side of the melting furnace 11 and one side of the chamber 1.

The chamber 1 further includes a chamber pressure check valve 1c that is automatically opened to lower the pressure in the chamber 1 when the air in the hollow portion 1b expands to a predetermined pressure or higher by heat, The chamber pressure check valve 1c is provided with a mesh net 1d having a mesh of 3 mm or less to prevent the microwave from flowing out.

Further, the melt outlet 10 is further provided with a melt outlet pressure check valve 10b which automatically opens when the internal pressure expands to a predetermined pressure or more, thereby lowering the internal pressure of the melt outlet.

A temperature sensor 10c for detecting the temperature of the molten raw material in real time and transmitting the detected temperature to the magnetron driving unit 8 is further provided in the melt discharge opening 10,

A heater 10d for preventing the coagulation of the molten metal is further provided on the outer surface of the melt discharge port 10 and when the temperature detected by the magnetron driving unit 8 through the temperature sensor 10c falls below a predetermined temperature, The molten liquid coagulation prevention heater 10d is operated to prevent the molten liquid in the molten liquid discharge port 10 from solidifying.

The heat insulating pipe 2 and the supporting base 3 and the heat insulating plates 6 and 7 for the upper and lower caps are made of alumina fiber board having a high point of 1,000 to 1,800 ° C. and a density (kg / m 3) of 300 to 600 (Alumina Fiber Board).

A heating temperature setting key 8a of the silicon carbide heating pipe 5 and an operation number setting key 8b of the magnetron 4 are further provided at the input terminal of the magnetron driving unit 8. [

Also, on the inner surface of the induction heating type silicon carbide heating pipe 5, a salt is introduced into the induction heating type silicon carbide heating pipe 5, and a chemical reaction with chlorine (Cl ₂ ) The molybdenum coating layer 5a having a melting point of 2,450 to 2,620 DEG C and a density of 10.2 g / cm < 3 > is further molded so as to prevent the substrate 5 from being damaged.

The function and effect of the thus configured multi-use continuous melting furnace of the present invention will be described as follows.

1 to 4, a multi-function continuous melting furnace according to the present invention includes a closed chamber 1, a heat insulating tube 2, a plurality of magnetrons 4, a plurality of induction heating type silicon carbide heating tubes 5 A heat insulating plate 6 (7) for the upper and lower caps, a magnetron driving part 8, a hopper 9, a melt discharge opening 10 and a melting furnace support 11.

At this time, the closed chamber 1 is formed into a cylindrical or polygonal shape having a predetermined diameter, length and volume by using a metal plate (for example, a stainless plate or the like) having a predetermined thickness, A plurality of magnetron mounting holes 1a are bored at intervals, and the upper and lower openings have a clogged shape to prevent microwave leakage.

At this time, a chamber pressure check valve 1c is further installed in the chamber 1 so that air in the hollow portion 1b formed between the inner surface of the chamber 1 and the outer surface of the heat insulating tube 2, The chamber pressure check valve 1c is automatically opened to lower the pressure in the chamber 1 when the pressure is higher than a predetermined pressure set on the pressure check valve 1c so that the chamber 1 itself is damaged And can be prevented from being broken.

In addition, at the entrance of the chamber pressure check valve 1c, a mesh net 1d having a mesh of 3 mm or less, which prevents microwaves from flowing out, is provided so that internal air is discharged through the chamber pressure check valve 1c It is possible to prevent the microwave diffracting the hollow portion 1b from being blocked by the mesh net 1d of the mesh of 3 mm or less and to prevent the microwave from leaking to the outside, .

The heat insulating tube 2 is shaped to have a cylindrical or polygonal shape corresponding to the shape of the chamber 1 and has an outer diameter smaller than the inner diameter of the chamber 1, ). ≪ / RTI >

Such a heat insulating tube 2 is inserted into the chamber 1 so as to have a shape in which a part of the upper and lower ends protrude to the outside in a state in which a plurality of induction heating type silicon carbide heating tubes 5, A hollow portion 1b having a predetermined height is provided between the inner surface of the chamber 1 and the outer surface of the heat insulating tube 2 since the chamber 1 is fixedly installed in the chamber 1 through a plurality of support rods 3 installed at regular intervals. Is formed.

The heat insulating tube 2 having the above-described structure is discharged through the waveguide 4a of the magnetron 4 and then diffracted in the hollow portion 1b by the induction heating type silicon carbide heating tube 5 so that the heat generated in the induction heating type silicon carbide heating pipe 5 is not transmitted to the chamber 1, so that the temperature rise of the chamber 1 is minimized .

As a special vacuum tube for controlling the flow of electrons by applying a magnetic field, the magnetrons 4, which are used for strongly outputting microwaves, are provided with waveguides 4a for emitting microwaves, And end portions thereof are detachably attached to the magnetron mounting holes 1a of the chamber 1, respectively.

The magnetron 4 oscillates a high frequency when a high voltage is applied from the high voltage transformer of the magnetron driving unit 8 to generate a predetermined frequency band of the predetermined frequency band The microwaves emitted from the magnetrons 4 are emitted from the hollow portion 1b formed between the inner surface of the chamber 1 and the outer surface of the heat insulating tube 2 And performs induction heating of the induction heating type silicon carbide heating tubes 5 to a predetermined temperature (for example, 900 to 1,500 ° C).

Since the ends of the waveguide 4a are detachably attached to the magnetron mounting holes 1a of the chamber 1 as described above, the magnetrons 4 can be easily replaced .

On the other hand, the plurality of induction heating type silicon carbide heating pipes (5) have a specific gravity of 3.12, a melting point of 2,600 to 2,800 ° C. and black hardening silicon carbide (Black SiC) Extrusion molding is carried out so as to have a predetermined diameter and length in accordance with the characteristics of the target raw material and the like so that the inside of the heat insulating tube 2 is filled.

The plurality of induction heating silicon carbide heating tubes 5 are arranged such that when microwaves of a predetermined band are emitted from the magnetrons 4 operated in response to the output signal of the magnetron driving unit 8, (I.e., induction heating) within the range of the molten liquid discharge port 10, and continuously supplies the molten material, which is the powder raw material passing through the inside thereof, to the melt discharge port 10 continuously.

At this time, when the target of the object to be introduced into the induction heating type silicon carbide heating pipe 5 is not a chlorine (Cl ₂ ) component in the case of various mineral powders or glass, there is no significant problem, The chlorine (Cl ₂ ) component generated in the process of melting the salt is chemically reacted with the induction heating type silicon carbide heating pipe 5 so that the induction heating type silicon carbide heating pipe (5) is damaged, so that its service life may be very short.

Therefore, in the present invention, when the object to be charged with the object to be heated is salt, molybdenum having a characteristic of absorbing microwaves such as silicon carbide is applied to the inner surface of the induction heating type silicon carbide heating pipe 5, The molybdenum coating layer 5a is formed to have a thickness such that the salt does not come into direct contact with the inner surface of the induction heating type silicon carbide heating pipe 5. [

At this time, the molybdenum has a melting point of 2,450 to 2,620 ° C. and a density of 10.2 g / cm 3, and a salt having a melting point of 800 to 900 ° C. is melted through the induction heating type silicon carbide heating tube 5 using a microwave The molybdenum coating layer 5a is not damaged at all.

That is, the chlorine (Cl ₂ ) component generated when the salt is introduced into the induction heating type silicon carbide heating pipe (5) as the heated material and melted as the soluble salt is chemically reacted with the chlorine (Cl ₂ ) component Since the chlorine (Cl ₂ ) component can completely prevent the induction heating type silicon carbide heating pipe 5 from being damaged, the induction heating type silicon carbide The life of the heating pipe 5 itself can be greatly extended.

The upper and lower heat insulating plates 6 and 7 are provided at the upper and lower ends of the heat insulating tube 2 and are disposed between the induction heating silicon carbide heating tubes 5 in the heat insulating tube 2, And functions to prevent the raw material and the melt from flowing into the formed space portion.

In this case, when the upper and lower insulating plates 6 and 7 are provided directly in contact with the lower end portions of the induction heating type silicon carbide heating pipe 5 in the heat insulating tube 2, the induction heating type silicon carbide heating pipe There is no space to be flowed or discharged when the air existing in the space between the heat pipes 5 is expanded, so that the heat insulating plates 6 and 7 for the upper and lower plugs are separated from the upper and lower ends of the heat insulating tube 2 have.

Therefore, when the upper and lower ends of the induction heating type silicon carbide heating pipes 5 in the heat insulating tube 2 are located, the raw material inlet holes (6) and (7) 7b of the induction heating type silicon carbide heating pipes 5 are formed by protruding the heating pipe insertion rods 6b and 7b on the rear surfaces of the raw material inflow holes 6a and 7a without puncturing the heating silicon carbide heating pipes 5a and 6a Heat pipes 6 and 7 are provided on the upper and lower ends of the induction heating type silicon carbide heating pipes 5 so that the heating pipe insertion rods 6b and 7b are partially inserted into the induction heating type silicon carbide heating pipes 5 It is preferable that a gap is formed between the inner surfaces of the upper and lower heat insulating plates 6 and 7 and the upper and lower ends of the induction heating silicon carbide heating pipes 5 so that air can flow.

On the other hand, considering that the heat insulating plates 6 and 7 for the upper and lower caps including the heat insulating tube 2 and the support base 3 are in direct or indirect contact with the induction heating type silicon carbide heating pipes 5 The induction heating type silicon carbide heating pipes 5 are formed to a thickness of, for example, 900 to 1,500 (mm) by molding them into an alumina fiber board having a high melting point of 1,000 to 1,800 ° C. and a density (kg / The heat insulating tube 2 and the supporting base 3 and the heat insulating plates 6 and 7 for the upper and lower caps are not melted or thermally deformed to maintain their own shape.

The magnetron driving unit 8 applies a high voltage to the magnetrons 4 through a high voltage transformer when a power voltage is supplied from a solar cell or the like including a commercial power supply voltage, thereby causing the magnetrons to perform high frequency oscillation.

In the present invention, a heating temperature setting key 8a for setting the heating temperature of the induction heating type silicon carbide heating pipes 5 to an input terminal of the magnetron driving unit 8, The operation number setting key 8b can be additionally provided.

Therefore, the operator of the melting furnace is required to determine the characteristics of the raw material such as various mineral powders (slag and the like), the glass or the salt to be melted and passed through the induction heating type silicon carbide heating pipes 5, The heating temperature of the silicon heating tubes 5 can be set through the heating temperature setting key 8a and the driving number of the magnetrons 4 can be adjusted and set through the operating number setting key 8b The compatibility of the melting furnace itself can be greatly improved.

The hopper 9 is provided with a screw 9b which is driven by a motor 9a and is installed in an upper part of the heat insulating pipe 2. The hopper 9 is provided with a screw- To the inside of the induction heating type silicon carbide heating pipes 5 in a continuous and uniform manner.

The melt discharge port 10 is provided with a manual or automatic valve 10a for controlling the discharge amount of the melt as well as controlling the amount of the melt discharged from the melt discharge port 10. The melt discharge port 10 is integrally formed with a bottom portion of the heat insulating pipe 2 Heating the silicon carbide heating pipe 5, and then continuously and continuously discharging the object to be heated continuously. Then, the manual or automatic valve 10a is operated in response to the operator's request, And discharging it continuously through the outlet.

At this time, when the melt outlet port 10 is further provided with a melt outlet port pressure check valve 10b so that the inner pressure of the melt outlet port 10 is expanded to a predetermined pressure set by the melt outlet port pressure check valve 10b , The melt outlet port pressure check valve 10b is automatically opened to lower the pressure in the melt outlet 10 so that the melt outlet 10 can be prevented from being damaged or damaged by the expansion pressure of the melt.

In the present invention, a temperature sensor 10c is additionally provided in the melt discharge port 10 to detect the temperature of the molten liquid collected at the melt discharge port 10 side in real time by the temperature sensor 10c, Further, a heater 10d for preventing solidification of the molten liquid, which is under the control of the magnetron drive unit 8, is further provided on the outer surface of the melt discharge opening 10.

Therefore, when the melting furnace to which the present invention is applied operates in the magnetron driving unit 8, the melt temperature and the predetermined temperature in the melt discharge opening 10 detected in real time through the temperature sensor 10c are compared with each other, It is possible to operate the heater 10d for preventing the coagulation of the molten metal when the temperature of the molten liquid collected in the discharge port 10 is lowered to a predetermined temperature or lower and the molten liquid stagnated in the molten liquid discharge port 10 is lowered in temperature It can be prevented in advance that it is solidified.

The melting furnace 11 is basically fixed in the form of a steel tower on the ground, and functions to make the melting furnace to which the present invention is applied can be inclined at a predetermined angle desired by the operator.

In the present invention, a hinge shaft 12a is provided between the melting point support 11 and the contact portion between the outer surface of the chamber 1 and the melting point support 11 and one side of the chamber 1 And further includes an inclination angle adjusting means 12 including a hydraulic cylinder 12b and the like.

Therefore, in consideration of the characteristics of the raw material to be melted and passed through the induction heating type silicon carbide heating pipes 5 and the number of operation of the magnetrons 4, the operator of the melting furnace is required to adjust the inclination angle of the melting furnace itself through the inclination angle adjusting means 12 So that the passing speed of the raw material passing through the induction heating type silicon carbide heating pipes 5 can be controlled.

The hydraulic cylinder 12b installed at the inclination angle adjusting means 12 is installed between one side of the melting furnace support 11 and one side of the chamber 1 so that the rod length of the hydraulic cylinder 12b It is possible to smoothly rotate the melting furnace itself about the hinge shaft 12a by a relatively heavy chain to adjust it to a desired angle of inclination.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Which will be apparent to those skilled in the art.

1: chamber
1a: Magnetron mounting hole 1b: Hollow portion
1c: Chamber pressure check valve 1d: Net mesh
2: Insulation tube
3: Support
4: Magnetron 4a: Waveguide
5: induction heating type silicon carbide heating tube 5a: molybdenum coating layer
6, 7: Insulating plate for upper and lower caps
6a, 7a: raw material inflow hole 6b, 7b: heating pipe insertion rod
8: Magnetron drive section
8a: Heat generation temperature setting key 8b: Operation number setting key
9: Hopper
9a: Motor 9b: Screw
10: melt outlet
10a: manual or automatic valve 10b: melt outlet pressure check valve
10c: Temperature sensor 10d: Heater for preventing coagulation of melt
11: melting zone
12: inclination angle adjusting means
12a: Hinge shaft 12b: Hydraulic cylinder

Claims (9)

A closed chamber having a cylindrical shape or a polygonal shape with a predetermined diameter, length and volume, a plurality of magnetron mounting holes perforated outside, and a top and a bottom opening with a closed shape;
A plurality of supporting members having a cylindrical or polygonal shape corresponding to the shape of the chamber and partially protruding upward and downward and inserted at a predetermined interval in a state of being inserted into the chamber, A heat insulating tube;
And a microwave is emitted to the hollow portion of the chamber to induce heating of the induction heating type silicon carbide heating pipes to induction heating at a predetermined temperature when a high voltage is applied from the magnetron driving portion to the magnetron mounting holes of the chamber A plurality of magnetrons;
And is extruded to have a predetermined diameter and length by using black silicon carbide (Black SiC). When the microwaves are emitted from the magnetrons in a state where they are installed in a form to fill the inside of the heat insulating tube, A plurality of induction heating type silicon carbide heating tubes for melting the object to be heated;
An upper and a lower heat insulating plate installed at upper and lower ends of the heat insulating tube to prevent the raw material and the melt from flowing into the space formed between the induction heating silicon carbide heating tubes in the heat insulating tube;
A magnetron driving unit for applying a high voltage to the magnetrons when the power is supplied to allow the magnetrons to oscillate at a high frequency;
A hopper which is installed on the upper part of the heat insulating tube and uniformly supplies an object of powder as a raw material into the induction heating type silicon carbide heating tubes;
A melt discharge port provided with a manual or automatic valve and extending integrally from the bottom of the heat insulating pipe to control the discharge of molten heated material discharged through each of the induction heating type silicon carbide heating pipes;
And a melting furnace fixedly installed on the ground to fix and install the melting furnace at a predetermined angle.
The method according to claim 1,
And a tilt angle adjusting means for adjusting a tilt angle of the melting furnace between the melting furnace support and the one side of the chamber, wherein the hinge shaft is provided at the contact portion between the melting furnace support and the outer surface of the chamber. Continuous melting furnace.
The method of claim 2,
Wherein the inclination angle adjusting means comprises:
And a hydraulic cylinder is provided between one side of the chamber and the other side of the melting furnace, and a multi-purpose continuous melting furnace using the magnetron.
The method according to claim 1,
The chamber pressure check valve is further provided with a chamber pressure check valve that automatically opens when the air in the hollow portion expands to a predetermined pressure or more by heat to lower the pressure in the chamber. A mesh net of ㎜ or less of mesh is provided on the surface of the continuous melting furnace.
The method according to claim 1,
Wherein the melt outlet port is further provided with a melt outlet pressure check valve that automatically opens when the internal pressure expands to a predetermined pressure or more and lowers the pressure in the melt outlet.
The method according to claim 1,
A temperature sensor for detecting the temperature of the molten raw material in real time and transmitting the detected temperature to the magnetron driving unit is further provided in the melt discharge port and a heater for preventing the coagulation of the molten liquid is further provided on the outer surface of the melt discharge port, Wherein when the temperature detected by the sensor is lowered to a predetermined temperature or less, the molten liquid in the molten liquid discharge port is prevented from solidifying by operating the heater for preventing solidification of the molten liquid. .
The method according to claim 1,
The heat insulating pipe, the support base, and the heat insulating plate for the upper and lower caps,
Characterized in that the melting point is formed by an alumina fiber board having a high melting point of 1,000 to 1,800 DEG C and a density (kg / m3) of 300 to 600.
The method according to claim 1,
Wherein the input terminal of the magnetron driving unit is further provided with a heating temperature setting key of a silicon carbide heating pipe and a setting key of operating numbers of the magnetrons.
The method according to claim 1,
Wherein a molybdenum coating layer having a melting point of 2,450 to 2,620 DEG C and a density of 10.2 g / cm < 3 > is further formed on the inner surface of the induction heating type silicon carbide heating tube.

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