KR102054946B1 - Microwave electric furnace - Google Patents

Abstract

The present invention relates to a microwave electric furnace. A microwave supply unit introduces microwave power into an internal space of a furnace body, and the introduced microwave power is raised by a heat generating unit. Heated heat energy is uniformly transferred into a furnace chamber through a heat dissipation unit to which the heat generating unit is fixedly attached, and the outflow of the heat energy heated up in this way is suppressed by a heat insulation unit. With this configuration, the heat energy generated by microwaves can be uniformly transmitted throughout an apparatus and the temperature can be quickly raised to the target temperature.

Description

Microwave Furnace {MICROWAVE ELECTRIC FURNACE}

The present invention relates to a microwave electric furnace, and more particularly, to a microwave electric furnace that allows the heat energy generated by the microwaves to be uniformly transmitted throughout the device, as well as to quickly increase the temperature to the target temperature.

In the process of producing a negative electrode material for a secondary battery, at least one gaseous carbon precursor selected from the group consisting of methane, propane, butane, acetylene, benzene, and toluene is coated on the reactor when the silicon composite oxide is coated with carbon. Injecting and heating to 600 ℃ to 1200 ℃ to coat the silicon composite oxide with carbon obtained through a gas decomposition reaction.

To this end, a supercantal (MoSiO ₂ ) heating element or a silicon carbide (SiC) heating element, which is a conventional electric heating element, is installed inside a heating chamber, and heat treatment such as coating of carbon is performed by heating radiant heat by Joule heat of the electric heating element.

In this case, a plurality of electric heating elements (MoSiO ² or SiC) of the conventional electric heating furnace is installed inside the furnace chamber composed of a refractory insulating material.

However, the fine carbon particles formed through the decomposition reaction of the carbon precursor gas penetrates into the inner wall of the refractory insulation constituting the furnace chamber, which acts as one of the factors causing frequent production interruption due to short circuit or short circuit.

In addition, in the conventional electric heating furnace, the above-mentioned fine carbon particles generated by abrasion or breakage of the heating element are dropped or worn inside the heating chamber to generate contaminants, and frequent heating element replacement is performed, resulting in low productivity and high quality materials. There is a problem that can not be obtained, the life is shortened by electricity.

In addition, in the production of cathode materials for secondary batteries, a typical three-way battery is composed of calcination of a mixture of nickel (Ni), manganese (Mn), and cobalt (Co), and the LFP battery is made of lithium iron phosphate. Firing by is required.

In addition, the box-type electric furnace is mainly used for the laboratory for the firing or glass melting of the inorganic material.

These box-type furnaces are equipped with a plurality of electric heating elements (MoSiO2 or SiC) inside the furnace chamber composed of refractory insulation, and are mounted in a refractory container for heating and heating or melting of glass. A crucible (usually made of platinum or alumina) filled with raw materials is mounted and glass is melted by heat by electric heating of a heating element.

In this case, there is a disadvantage that the temperature uniformity inside the furnace is not high, the temperature increase process takes a long time, and energy consumption is large.

In order to compensate for the disadvantages of the conventional electric heating furnace and heat treatment more efficiently, an electric heating apparatus using microwaves has been proposed.

However, the conventional electric heating apparatus using such a microwave has a problem in temperature uniformity because the heating element is locally heated by microwave radiation.

Patent Registration No. 10-1047209

The present invention has been invented to improve the above problems, and to provide a microwave electric furnace that is capable of rapidly raising the temperature to the desired temperature as well as the heat energy generated by the microwave is uniformly transmitted throughout the device.

In order to achieve the above object, the present invention is a furnace body; A microwave supply unit for introducing microwave power into the internal space of the heating furnace body; A heat insulation unit including a first fireproof heat insulating material mounted on an inner space of the heating body and disposed along a bottom surface thereof, and a second fireproof heat insulating material fixed to form a furnace chamber mounted on the first fireproof heat insulating material; It is mounted along the left and right sides and the ceiling surface of the furnace chamber formed by the first fireproof insulation and the second fireproof insulation to generate heat by receiving microwaves supplied to the furnace chamber by the microwave supply unit. The heat generating unit comprises a mixture of silicon carbide (SiC), zirconia (ZrO ₂ ) and alumina (Al ₂ O ₃ ); And a silicon carbide material that uniformly radiates the heat heated by the heat generating unit into the heating chamber, and faces the left and right inner and inner ceiling surfaces of the second fireproof heat insulating material and faces the outer surface on which the heat generating unit is mounted. And a heat dissipation unit having an excitation heat dissipation unit, wherein the heat dissipation unit provides a microwave electric furnace, which prevents heat energy due to a temperature rise due to heat generation inside the furnace chamber to be discharged to the furnace body side. Can be.

Specifically, the present invention relates to a microwave supply unit for introducing microwave power into a furnace body, a dark room in which microwaves are diffused throughout the furnace without concentrating in one place, and to enable uniform heating. The heat generating unit consists of a heat generating block made of a special material including a plurality of silicon carbide (SiC) that resonates and vibrates by microwaves together with the first and second refractory heat insulating materials, and silicon carbide (SiC) which does not generate heat by microwaves. The furnace chamber is constituted by the heat dissipation unit, and a plurality of heat generating blocks, which are microwave resonance vibration silicon carbide (SiC) heating elements, are fixed at uniform intervals by a heat-resistant inorganic adhesive that can be used at high temperatures in the heat dissipation unit made of a silicon carbide (SiC) heat sink. Energy generated from the heat generating block is transferred to the heat radiation unit that does not react to the microwaves. As it acts as a heat conductor, the furnace chamber is heated, primarily allowing the microwaves to spread uniformly through the dark chamber, and a plurality of heat generating blocks are generated to be delivered to the heat radiation unit forming the furnace chamber as a whole. The heating chamber formed inside the heat dissipation unit constituting the silicon carbide (SiC) heat dissipation plate by electric energy is configured to uniformly heat.

Here, it characterized in that it further comprises a dark room formed to be spaced apart a predetermined distance between the inner surface of the heating body and the outer surface of the heat insulation unit so that the inflow of light from the outside of the heating body.

At this time, the furnace chamber is characterized in that any one of the continuous chamber of the tunnel shape longer than the length of the front, rear, left and right side, or the intermittent chamber of the same length or different from the front, rear, left, and right side compared to the length of the upper, lower, left and right sides.

The apparatus may further include a fire door configured to be opened and closed at the front and the rear of the heating body, respectively, a fire door including a fire resistant heat insulating material, and an opening and closing actuator configured to open and close the fire door with respect to the heating body. It is characterized in that the continuous chamber of the tunnel shape longer than the length of the front and rear than the length of the up, down, left and right sides.

The heating unit is formed by mixing and sintering the powder of the silicon carbide, the powder of the zirconia and the powder of the alumina, the upper and lower surfaces having a diameter of a first length, and And a plurality of heat generating blocks including an outer circumferential surface having a thickness of a second length smaller than a first length, wherein the plurality of heat generating blocks are attached to an outer surface of the heat dissipation unit.

In addition, the first length is 10 to 40 mm, the second length is characterized in that 1 to 5 mm.

In addition, the plurality of heat generating blocks are fixedly arranged in a row and a column on the outer surface of the heat dissipation unit, the heat generating block adjacent to one of the heat generating blocks (hereinafter the first block) of the plurality of heat generating blocks (hereinafter second) Block) In the virtual line passing through each center, the distance between the first point where the outer peripheral surface of the first block and the virtual line meet, and the second point where the outer peripheral surface of the second block and the virtual line meet is 0.1 to 40mm It is characterized by that.

According to the present invention having the above configuration, the following effects can be achieved.

First, according to the present invention, a microwave is radiated into a heating furnace body through a microwave supply unit that generates microwaves by applying electricity, and the heat generating unit is heated by heat generated by internal resonance vibration by microwaves. It can be used for the firing or melting of, there is no concern about pollution, leakage current, and there is no burnout of the heating element, so that the life of the electric furnace is increased and energy can be greatly reduced.

In addition, the present invention is because the microwave supplied through the microwave supply unit is uniformly transmitted through the dark room to enable uniform heating, so that the temperature inside the furnace can be kept constant with almost no change of the product produced from the heated object. It has the effect of greatly improving the quality.

In addition, by using the microwave electric furnace according to the present invention, the precursor gas can be used in the case of coating other materials as particles generated by pyrolysis by introducing the precursor gas into the furnace.

Microwave electric furnace according to the present invention can save the electric energy due to the high thermal efficiency compared to the electric heating furnace by Joule heat generated by applying electricity to the ordinary electric heating element, and also lower than the electric heating furnace applying the conventional microwave Uniform heating is possible with electric energy, so it is suitable to obtain high quality material.

In particular, by using the microwave electric furnace according to the present invention can produce a high-quality secondary battery negative electrode material or positive electrode material, it is possible to produce graphene (Graphene), firing of inorganic materials or glass melting, so in terms of versatility It is excellent, its overall configuration is simple and it can save more than 50% of electric energy.

In particular, the present invention prevents the fine carbon particles formed through the decomposition reaction of the carbon precursor gas inside the furnace when the anode material of the secondary battery is produced to prevent penetration of the silicon carbide (SiC) heat sink constituting the furnace chamber. Alternatively, there is no fear of production interruption due to a short circuit and there is no ordinary electric heating element inside the chamber, thereby preventing the problem of generating contaminants by falling or wearing inside the chamber due to abrasion or breakage of the heating element.

Therefore, the present invention may provide a breakthrough method for increasing productivity and producing a high quality secondary battery negative electrode material, and may be effectively applied to the production of graphene in the same manner.

In addition, when melting the glass using the apparatus of the present invention can obtain a higher quality material, reduce the wear of the electric furnace, extend the life of the entire apparatus and higher than the electric heating electric furnace of the conventional resistance heating element It will be possible to melt the temperature material.

Above all, by the microwave electric furnace according to the present invention, it is possible to achieve a very high temperature up to about 2000 ℃ in a short time, and because of the uniform heating by the microwave has the effect of greatly improving the glass quality.

When using the microwave electric furnace of the present invention as a firing furnace, it is possible to obtain a high-purity material, as well as to prevent accidents due to short circuits and short circuits, and also to produce a continuous firing furnace is suitable for mass production.

1 is a perspective view showing the overall appearance of a microwave electric furnace according to an embodiment of the present invention;
2 is a front sectional conceptual view showing the internal structure according to the II-II line of FIG.
3 is a schematic cross-sectional view showing the internal structure according to the III-III line of FIG.
4 is a partial enlarged conceptual view showing a state in which the heat generating unit, which is a main part of the microwave electric furnace according to an embodiment of the present invention, is viewed from the IV point of view in FIG. 2 and FIG. 3.
5 and 6 is a partial perspective conceptual view showing the opening and closing process of the fire door provided in the main body of the furnace according to an embodiment of the present invention the microwave furnace.
7 is a cross-sectional conceptual view showing the internal structure of a microwave electric furnace according to another embodiment of the present invention.
8 is a state in which the entire heating chamber chamber is uniformly heated by opening a fire door provided in a heating furnace body, which is a main part of the present invention, while maintaining a constant temperature by heating a microwave electric furnace according to another embodiment of the present invention. Drawing substitute photo

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

In this specification, the embodiments are provided so that the disclosure of the present invention may be completed and the scope of the present invention may be completely provided to those skilled in the art.

And the present invention is defined only by the scope of the claims.

Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

In addition, the same reference numerals throughout the specification refer to the same components, and the terminology (discussed) used herein is for the purpose of describing the embodiments are not intended to limit the invention.

As used herein, the singular forms "a", "an" and "the" include plural unless the context clearly dictates otherwise, and the elements and acts referred to as 'comprises' or 'do' not exclude the presence or addition of one or more other components and acts. .

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art.

In addition, the terms defined in the commonly used dictionary are not ideally or excessively interpreted unless they are defined.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

For reference, Figure 1 is a perspective view showing the overall appearance of a microwave electric furnace according to an embodiment of the present invention, Figure 2 is a front sectional conceptual view showing the internal structure according to the line II-II of Figure 1, Figure 3 Fig. 1 is a schematic cross-sectional conceptual view showing the internal structure along the line III-III of Fig. 1.

4 is a perspective view of a specific part of FIGS. 2 and 3 from the point IV, showing a state in which the heat generating unit 40, which is a main part of the microwave electric furnace, according to an embodiment of the present invention is installed in the heat dissipation unit 50. This is a partial enlargement concept.

5 and 6 are partial perspective conceptual views illustrating an opening and closing process of the fire door 80 provided in the heating body main body 10, which is a main part of the microwave electric furnace, according to an embodiment of the present invention.

In addition, Figure 7 is a cross-sectional conceptual view showing the internal structure of a microwave electric furnace according to another embodiment of the present invention.

In addition, Figure 8 is to heat the microwave furnace according to another embodiment of the present invention while maintaining a constant temperature by opening the fire door provided in the main body of the heating furnace which is the main part of the present invention to uniformly heat the entire furnace chamber It is a photograph for drawing substitutes that are taken.

For reference, in FIG. 5, '◁', which is a portion representing the refractory solenoid valve 96, is a state in which the flow path is opened, and '▶ ◀', which is a portion representing the refractory solenoid valve 96 in FIG. 6, is blocked. Each state is shown.

As shown in the present invention, the microwave supply unit 20 introduces microwave power into the internal space of the furnace main body 10, and the introduced microwave power is elevated by the heat generating unit 40, and the heated heat energy is heated. The unit 40 is uniformly delivered in the furnace chamber 60 through the fixed heat dissipation unit 50, but it can be understood that the external outflow of the heat energy thus raised is suppressed by the heat insulation unit 30. have.

First, the furnace main body 10 is formed in the form of a box as a whole, made of a metal material, the space for the microwave supply unit 20, the heat insulation unit 30, the heat generating unit 40, the heat dissipation unit 50, etc. to be described later And area.

And, the microwave supply unit 20 is provided to perform the role of introducing the microwave power into the inner space of the heating body (10).

In addition, the heat insulation unit 30 is installed in the inner space of the furnace body 10 and is disposed along the bottom surface of the first fireproof heat insulating material 31 and the heating furnace chamber mounted on the first fireproof heat insulating material 31 ( And a second refractory heat insulating material 32 fixedly disposed to form 60).

In addition, the heat generating unit 40 is mounted along the left and right sides and the ceiling surface of the furnace chamber 60 formed by the first fireproof heat insulating material 31 and the second fireproof heat insulating material 32 to the microwave supply unit 20. By generating the heat received by the microwave supplied to the heating chamber chamber 60 side, it is made of a mixture of silicon carbide (SiC), zirconia (ZrO ₂ ) and alumina (Al ₂ O ₃ ).

In addition, the heat dissipation unit 50 is made of a silicon carbide material that uniformly radiates the heat heated by the heat generating unit 40 into the furnace chamber 60, and includes the left and right sides of the second refractory heat insulating material 32. Facing the side and the inner ceiling surface is to have an outer surface on which the heat generating unit 40 is mounted.

Therefore, the heat insulation unit 30 suppresses the heat energy due to the temperature rise due to the heat generation inside the furnace chamber 60 to flow out to the furnace body 10 side.

The present invention can be applied to the embodiment of the configuration as described above, it will be apparent that the following various embodiments can be applied.

First, between the inner surface of the furnace body 10 and the outer surface of the heat insulation unit 30, the heat insulation unit 30, that is, the second refractory heat insulating material 32 so that the inflow of light from the outside of the furnace body 10 is blocked. It may further include a dark room 70 formed to be spaced apart a predetermined distance between the outer surface of the) and the inner surface of the heating furnace body (10).

The dark room 70 may be referred to as a space for preventing local overheating caused by microwaves generated from the microwave supply unit 20 and inducing uniform heating.

Dark room 70 means a space between the furnace body 10 and the second refractory heat insulating material 32, and is intended to induce uniform diffusion of microwaves by blocking the interference of light.

On the other hand, the microwave supply unit 20, as shown in Figs. 2 and 3, may be applied to an embodiment including a microwave oscillator 21, a waveguide circuit 22 and a microwave radiation window 23.

First, the microwave oscillator 21 is mounted in plural along the left and right both sides and the upper surface of the furnace body 10, and the waveguide circuit 22 is mounted on the microwave oscillator 21 to form the outer surface of the second fireproof heat insulating material 32. And a microwave radiation window 23 is connected to the waveguide circuit 22 to radiate the microwave generated from the microwave oscillator 21 into the dark room 70. It is provided.

The detailed structure and operation mechanism of the above-described microwave supply unit 20 are similar to those of the known technology, and thus will be omitted for convenience.

On the other hand, the furnace chamber 60 may be any one of a continuous chamber of a tunnel shape having a long front and rear length, or an intermittent chamber having the same length or different lengths of the front, rear, left, and right sides compared to the length of the top, bottom, left, and right sides.

1 to 6 will be described in terms of a continuous chamber, and FIG. 7 to be described later will be described in terms of an intermittent chamber.

On the other hand, before and after the heating body main body 10, the fireproof door 80 in which the fireproof heat insulating material is built is mounted so that opening and closing is possible.

The fire door 80 is opened and closed actuator 90 is opened and closed with respect to the furnace body 10, the furnace chamber 60 shown in Figures 1 to 6 has a long front and rear length compared to the length of the upper, lower, left and right sides. It may be a tunnel-shaped continuous chamber.

Here, in the present invention, a plurality of first crucibles 61 and a heating furnace, which are input to the heating chamber 60 and accommodated with the heating object 67, to enable mass continuous production of the heating object 67. It may be further provided with a refractory conveyor (63) for receiving a driving force to the bottom surface of the furnace chamber 60 along the longitudinal direction of the chamber 60 so as to transport the plurality of first crucibles 61 in one direction. will be.

On the other hand, the heating unit 40 is formed by mixing and sintering the powder of silicon carbide, the powder of zirconia and the powder of alumina, the upper surface having a diameter of the first length (D) as shown in FIG. And a plurality of heat generating blocks 41 including a lower surface and an outer circumferential surface having a thickness of a second length t smaller than the first length D, wherein the plurality of heat generating blocks 41 are heat dissipation units 50. It is attached to the outer surface of the.

Here, the first length (D) is 10 to 40 mm, the second length (t) is 1 to 5mm, a plurality of heat generating blocks 41 is a plurality of rows on the outer surface of the heat dissipation unit 50 as shown in FIG. Overheated and fixed.

In this case, an imaginary line L passing through the center of each of the heating blocks (hereinafter, the first block 41a) and the neighboring heating blocks (hereinafter, the second block 41b) of the plurality of heating blocks 41 is described below. 4 (a)), the second point p2 at which the outer circumferential surface of the first block 41a and the virtual line L meet and the outer circumferential surface of the second block 41b and the virtual line meet each other (p2). May be between 0.1 and 40 mm.

The heating block 41 is a resonant vibration acts on the microwave to generate heat, pure silicon carbide is a material that does not have a heat generating ability, but because of its excellent thermal conductivity, while utilizing the properties of such silicon carbide, silicon carbide such as zirconia and alumina, etc. It is made by mixing a material resistant to high temperatures.

That is, the heating block 41 is to be made to use both of the excellent thermal conductivity characteristics of silicon carbide, and the characteristics that generate heat in response to microwaves such as zirconia.

Among them, zirconia is a material that plays a big role in rapidly raising the temperature from ultra-high temperature to a short time, and when zirconia powder is energized, it is conceived to generate heat in an instant.

Applicant is mixed with zirconia and alumina in silicon carbide and applied to the entire heat dissipation unit 50, but to solve the problem that can not be made properly in the heat concentration, the heating block 41 in the coin shape of 500 won coin size of the Republic of Korea As a result of fabricating and attaching a plurality of heat dissipation units 50 to the whole, it was confirmed that the desired atmosphere temperature in the furnace 60 could be achieved uniformly and efficiently efficiently.

Whether the desired atmosphere temperature can be achieved can be confirmed from the state in which the inside of the furnace chamber 60 is heated red as a whole.

That is, the object of the present invention is to make the heat distribution inside the furnace chamber 60 uniform and good quality while making the atmosphere temperature inside the furnace chamber 60 at an ultra-high temperature of 1000 to 2000 degrees Celsius. The heating block 41 may serve as a means for uniformly generating heat in the heating chamber 60.

And, the area occupied by the plurality of heat generating blocks 41 disposed on the heat dissipation unit 50 is 40 to 70%, preferably 50 to 60%, more preferably compared to the total area of the outer surface of the heat dissipation unit 50. At around 60%, the highest heating efficiency and the desired ambient temperature could be reached most quickly.

Here, the second length (t) of the thickness of the heating block 41 is to be produced as described above about 1 ~ 5mm, preferably about 2 ~ 3mm.

In this case, when the second length t is less than 1 mm, the heating effect may hardly be expected. When the second length t exceeds 5 mm, the waste of material and the volume of the entire apparatus may be increased, and the heating effect may be rather reduced. Because it may be.

As described above, the distance between the first and second blocks 41a and 41b may be disposed such that 0.1 to 40 mm, that is, the first and second blocks 41a and 41b are almost in contact with each other. 41a, 41b) Even if it is arrange | positioned by the 1st length D which is each diameter, a uniform and rapid ultra-high temperature rising effect can be expected.

Here, the distance between the first and second blocks 41a and 41b is more preferably shorter than the heat generation time when the distance between the first and second blocks 41a and 41b is about half of the first length D. Rapid reaching of the desired ambient temperature was possible.

At this time, when the distance between the first and second blocks 41a and 41b is completely in contact with each other, the material may be wasted due to excessive use of the first and second blocks 41a and 41b. This is because when the distance between the blocks 41a and 41b exceeds 40 mm, the problem of deterioration of the heating effect occurs.

On the other hand, the present invention as shown in Figures 5 and 6, the fire door 80 can be understood that the structure can be lifted with respect to the front and rear of the furnace body 10 by receiving the driving force from the opening and closing actuator 90.

Here, the opening / closing actuator 90 may include a driving motor 95 having a first drive shaft (not shown) rotatable in a first direction and a second direction opposite to the first direction, and the driving motor 95. It may include a second drive shaft (not shown) provided separately from the first drive shaft to rotate in a direction opposite to the first drive shaft.

Although not shown in particular, in order to provide a lifting structure of the fire door 80, the first drive shaft is provided with a pinion, and the rack doors are provided on both sides of the fire door 80 in an up and down direction to be engaged with the fire door 80. The elevating embodiment may be applied.

Although not shown in particular, in order to provide a lifting structure of the fire door 80, the first drive shaft is provided with a winch or pulley, and both sides of the fire door 80 are connected to the above-described winch or pulley by winding and unwinding the fire door An embodiment of elevating 80 may be applied.

At this time, the fire door 80 is interconnected by connecting the first drive shaft and the fire door 80 so that the fire door 80 is raised by the first direction rotation of the first drive shaft, and lowered by the second direction rotation of the first drive shaft. It provides a lifting path of 80, and further provided with rails 91 are formed in front of the front of the furnace body 10 and the rear of both sides of the rear of the furnace body 10 to form a moving space facing each other. can do.

In addition, the doors 93, which are mounted on the front and rear surfaces of the furnace body 10, respectively, to communicate with the furnace chamber 60, which is a tunnel-shaped continuous chamber 65, to enable the rail 91 to be fixed, is described below. 6 may further include a door opening / closing box 92 having a fireproof insulating material formed therein.

On the other hand, the present invention, when the furnace main body 10 is operated while the fire door 80 is kept airtight with respect to the furnace main body 10 to prevent the heat in and out of the inside and the outside does not occur at all to maintain a closed state Of course, the vacuum pump 94 and the refractory solenoid valve 96 may be further provided.

The vacuum pump 94 is connected to the second drive shaft to interlock with the second drive shaft rotating in the first direction or the second direction to provide a negative pressure or release the negative pressure generation.

The refractory solenoid valve 96 pipe-connects both outer surfaces of the vacuum pump 94 and the rail 91 so that the vacuum pump 94 is operated when the fire door 80 descends to the lower end of the rail 91. In order to form a negative pressure between the lower end of the rail 91 and the fire door 80 on the pipe, the flow path of the pipe is opened to the vacuum pump 94 side.

Therefore, when the fire door 80 closes the entrance 93 of the door opening / closing box 92 and maintains a closed state, as shown in Fig. 5, the vacuum pump 94 is in operation and the fire solenoid valve ( 96 is a state in which the flow path between the rail 91 lower end side and the vacuum pump 94 is opened.

Thereafter, when the fire door 80 is to be opened, the operation of the vacuum pump 94 is stopped and the driving motor 95 is operated to raise the fire door 80.

Next, in the state where the work process is completed and the fire door 80 is opened as shown in FIG. 6, the first crucible 61 may be taken out from the fireproof conveyor 63, and the heating furnace main body 10 is again operated. In order to close the fire door 80 for the purpose of, ① the refractory solenoid valve 96 blocks the flow path between the rail 91 lower end side and the vacuum pump 94, ② operates the drive motor 95, and After lowering the door 80, the vacuum pump 94 may be operated.

On the other hand, the furnace chamber 60 as an intermittent chamber is a second refractory heat insulating material fixedly mounted on the upper surface of the first refractory heat insulating material 31 between the left and right inner surface of the heating body 10, as shown in FIG. Along with the dark room 70 formed by 32, the following embodiments may be applied.

First, the present invention is a second crucible 62 which can be put into the furnace chamber 60 and the heated object 67 is accommodated, and is mounted on an inner bottom surface of the furnace chamber 60 to allow the second crucible 62 to be placed therein. It may be further provided with a crucible pedestal (64) supporting the support.

In addition, the present invention is further connected to the outside of the furnace body 10 from the inner upper surface of the furnace chamber 60, it may be further provided with a communication 65 for discharging the heat inside the furnace chamber 60. .

In addition, the present invention may further include a burner 66 provided at the end of the communication 65 to use heat inside the furnace chamber 60 as a heat source.

In addition, although not particularly shown, the communication 65, along with a passage in which a temperature sensor for measuring the temperature inside the furnace chamber 60 in real time, is installed, has a tube shape made of alumina in order to maintain heat resistance to extremely high temperatures. It is preferable to be produced.

Hereinafter, the operation and effects of the microwave electric furnace according to the preferred embodiment of the present invention will be described as follows.

First, in the present invention, the microwave is radiated into the heating furnace main body 10 through the microwave supply unit 20 that generates microwaves by applying electricity so that the heat generating unit 40 generates heat by internal resonance vibration caused by microwaves. By the electric heating method, it can be utilized for the firing or melting of various inorganic materials, there is no fear of contamination, leakage current, and there is no damage of the heating element, so that the service life of the electric furnace can be increased and energy can be greatly reduced. .

In addition, since the microwave supplied through the microwave supply unit 20 is uniformly transmitted through the dark room 70 to enable uniform heating, the temperature inside the heating furnace can be kept constant with almost no change. It has the effect of greatly improving the quality of products produced from water.

In addition, by using the microwave electric furnace according to the present invention, the precursor gas can be used in the case of coating other materials as particles generated by pyrolysis by introducing the precursor gas into the furnace.

The microwave electric furnace according to the present invention has a higher thermal efficiency than the electric heating furnace by Joule heat generated by applying electricity to an ordinary electric heating element, thereby saving electric energy, and applying the electric microwave to an electric heating furnace. Compared with low electric energy, it is possible to uniformly heat, making it suitable for obtaining high quality materials.

In particular, by using the microwave electric furnace according to the present invention can produce a high-quality secondary battery negative electrode material or positive electrode material, it is possible to produce graphene (Graphene), firing of inorganic materials or glass melting, so in terms of versatility It is excellent, its overall configuration is simple and it can save more than 50% of electric energy.

In particular, the present invention prevents the fine carbon particles formed through the decomposition reaction of the carbon precursor gas inside the furnace when the anode material of the secondary battery is produced to prevent penetration of the silicon carbide (SiC) heat sink constituting the furnace chamber. Alternatively, there is no fear of production interruption due to a short circuit and there is no ordinary electric heating element inside the chamber, thereby preventing the problem of generating contaminants by falling or wearing inside the chamber due to abrasion or breakage of the heating element.

Therefore, the present invention may provide a breakthrough method for increasing productivity and producing a high quality secondary battery negative electrode material, and may be effectively applied to the production of graphene in the same manner.

In addition, when melting the glass using the apparatus of the present invention can obtain a higher quality material, reduce the wear of the electric furnace, extend the life of the entire apparatus and higher than the electric heating electric furnace of the conventional resistance heating element It will be possible to melt the temperature material.

Above all, by the microwave electric furnace according to the present invention, it is possible to achieve a very high temperature up to about 2000 ℃ in a short time, and because of the uniform heating by the microwave has the effect of greatly improving the glass quality.

When using the microwave electric furnace of the present invention as a firing furnace, it is possible to obtain a high-purity material, as well as to prevent accidents due to short circuits and short circuits, and also to produce a continuous firing furnace is suitable for mass production.

As described above, it can be seen that the technical idea of the present invention is to provide a microwave electric furnace that enables the thermal energy generated by the microwaves to be uniformly transmitted throughout the inside of the apparatus, and to be rapidly heated to a target temperature.

In addition, many modifications and applications are also possible to those skilled in the art within the scope of the basic technical idea of the present invention.

10 ... The main body by heating
20 ... microwave supply unit
21.Microwave Oscillator
22.waveguide circuit
23.Microwave radiation window
30 ... Insulation Unit
31.First fireproof insulation
32.2nd fireproof insulation
40.Heating unit
41.Heating block
41a ... 1st block
41b ... second block
50 ... heat dissipation unit
60 ... heating chamber
61 ... First Crucible
62 ... Second Crucible
63.fireproof conveyor
64 crucible pedestal
65.Communication
66.Burner
67.Heat to be heated
70 ... darkroom
80 ... fireproof door
90 ... opening and closing actuator
91 ... rail
92 ... door opening and shutting box
93 ... Entrance
94 ... vacuum pump
95 ... driving motor
96 ... fireproof solenoid valve
97.Regulation bar
D ... 1st length
d ... the distance between the first point p1 and the second point p2
L ... virtual ship
p1 ... 1st point
p2 ... second point
t ... second length

Claims (7)

Furnace body;
A microwave supply unit for introducing microwave power into the internal space of the heating furnace body;
A heat insulation unit including a first fireproof heat insulating material mounted on an inner space of the heating body and disposed along a bottom surface thereof, and a second fireproof heat insulating material fixed to form a furnace chamber mounted on the first fireproof heat insulating material;
It is mounted along the left and right sides and the ceiling surface of the furnace chamber formed by the first fireproof insulation and the second fireproof insulation to generate heat by receiving microwaves supplied to the furnace chamber by the microwave supply unit. A heat generating unit comprising a mixture of silicon carbide (SiC), zirconia (ZrO 2), and alumina (Al 2 O 3);
It is made of a silicon carbide material that uniformly radiates the heat heated by the heat generating unit into the heating chamber chamber, and has an outer surface facing the left and right inner surface and the inner ceiling surface of the second fireproof insulation. Heat dissipation unit;
A fireproof door mounted on the front and rear of the heating body so as to be openable and closed, and having a fireproof heat insulating material therein; And
It includes an opening and closing actuator for opening and closing the fire door to the front and rear of the heating body main body,
The heating unit,
It is formed by mixing and sintering the powder of the silicon carbide, the powder of the zirconia and the powder of the alumina, the upper and lower surfaces having a diameter of 10 to 40 mm and a thickness of 1 to 5 mm Including a plurality of heating block including an outer peripheral surface,
The plurality of heat generating blocks are attached to the outer surface of the heat dissipation unit,
The plurality of heat generating blocks are fixedly arranged in a plurality of rows and columns on an outer surface of the heat dissipation unit, and a heat generating block (hereinafter, a second block) adjacent to one of the heat generating blocks (first block) of the plurality of heat generating blocks. In the virtual line passing through each center, the distance between the first point where the outer peripheral surface of the first block and the virtual line meet, and the second point where the outer peripheral surface of the second block and the virtual line meet is 0.1 to 40mm,
Opening and closing actuator,
A drive motor having a first drive shaft rotatable in a first direction and a second direction opposite to the first direction;
A second driving shaft provided separately from the first driving shaft and rotating in a direction opposite to the first driving shaft;
Interconnecting the first drive shaft and the fire door and providing a lifting path of the fire door, such that the fire door is raised by the first direction rotation of the first drive shaft and lowered by the second direction rotation of the first drive shaft, A rail which is disposed in front of the front of the furnace body and forms a moving space facing each other on both sides of the rear of the rear of the furnace body,
A door opening and closing box in which a fireproof insulation material is installed, which is mounted on each of the front and rear surfaces of the furnace body to form a doorway communicating with the furnace chamber, which is a tunnel-shaped continuous chamber, so as to secure the rail;
A vacuum pump connected to the second drive shaft to generate a negative pressure or release the negative pressure in cooperation with a second drive shaft rotating in a first direction or a second direction,
If the vacuum pump is operated when the fire door is lowered to the lower end of the rail by connecting the vacuum pump and both outer surfaces of the rail to each other, the flow path of the pipe is directed to the vacuum pump side to form a negative pressure between the lower end of the rail and the fire door on the pipe. Includes a refractory solenoid valve for opening,
The heat insulation unit, the microwave electric furnace characterized in that the heat energy due to the temperature rise due to the heat generated inside the furnace chamber to suppress the outflow to the main body of the heating furnace.
The method according to claim 1,
And a dark room formed at a predetermined distance from an inner surface of the heating body and an outer surface of the heat insulation unit so that the inflow of light from the outside of the heating body is blocked.
The method according to claim 1,
The furnace chamber is a microwave electric furnace, characterized in that any one of the continuous chamber of the tunnel shape longer than the length of the up, down, left and right side, or the intermittent chamber of the same length or different length of the front, rear, left, and right sides.
The method according to claim 1,
The furnace chamber is a microwave electric furnace, characterized in that the continuous chamber of the tunnel shape long length forward and backward compared to the length of the upper, lower, left and right sides.
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