KR20240069445A - Heat treatment apparatus for fabricating active material for secondary battery - Google Patents

Abstract

The present invention provides a furnace body for transferring and heat-treating materials; A new device that stores and moves materials inside the furnace body; A roller for transporting the new material; a heater disposed at a location spaced apart from the new unit; It includes a plurality of sagers placed on the roller, and when the first direction, which is the width direction of the furnace body, is called the column direction, and the third direction, which is the height direction of the furnace body, is called the single direction, a plurality of A heat treatment device may be provided in which a new unit is formed with at least a pair of adjacent rows and a plurality of columns in a new unit arranged in rows and stages, and the plurality of new unit units are provided at intervals along a first direction.

Description

Heat treatment equipment for manufacturing secondary battery active materials {HEAT TREATMENT APPARATUS FOR FABRICATING ACTIVE MATERIAL FOR SECONDARY BATTERY}

The present invention relates to a heat treatment device for manufacturing secondary battery active materials in which temperature distribution is improved through the relationship between the specifications of the furnace and the arrangement of the furnace for transporting the material.

In general, a heat treatment furnace is a device used to improve physical properties by applying high temperature heat to metal or non-metallic materials. Depending on the heat source, a combustion furnace that generates heat by burning coal, oil, and gas, and an electric heater are used. There is an electric furnace that uses radiation heat transfer and a radiant pipe that uses radiation heat transfer. Depending on the flow of material, it is divided into a continuous roller hearth type heat treatment furnace and a batch type heat treatment furnace. Ceramic sintering, metal + ceramic sintering, silver baking furnace, and ITO ( Indium tin oxide) is used in various fields such as powder sintering, enamel sintering, and sintering of secondary battery materials.

Among these, the continuous roller hearth type heat treatment usually includes a preheating zone that preheats the material at room temperature to around 100℃, a holding zone that maintains the material preheated in the preheating zone at a high temperature, and a cooling zone that cools the heat treated material. It is composed of a zone, and the gas supplied to the preheating zone and the holding zone is mainly atmospheric gas.

A conventional continuous roller hearth type heat treatment furnace includes a tunnel kiln disclosed in Korean Patent Publication No. 0009592, and the patent includes a type in which firing is performed by providing a space as a combustion chamber between the fired objects loaded on the firing carriage. In a tunnel kiln, a heat exchanger and a circulation fan outside the furnace are installed between the circulating gas suction port on the low-temperature side of the preheating zone and the gas discharge port on the high-temperature side, and a duct is installed to communicate these with the inside of the preheating zone furnace, and at the same time, a duct is installed outside the furnace in the cooling zone. A tunnel kiln is disclosed in which a circulation fan is installed and the circulation fan and the inside of the cooling zone furnace are communicated through a duct base material.

Korean Patent Publication No. 0009592

The present invention is intended to provide a heat treatment device for manufacturing secondary battery active materials that can maintain a uniform internal atmosphere in which materials are heat treated through the specifications of the furnace and the arrangement of the furnace for transporting the materials.

The present invention includes a furnace body that transfers and heat-treats the material; A new device that stores and moves materials inside the furnace body; A roller for transporting the new material; a heater disposed at a location spaced apart from the new unit; It includes a plurality of sagers placed on the roller, and when the first direction, which is the width direction of the furnace body, is called the column direction, and the third direction, which is the height direction of the furnace body, is called the single direction, a plurality of A heat treatment device may be provided in which a new unit is formed with at least a pair of adjacent rows and a plurality of columns in a new unit arranged in rows and stages, and the plurality of new unit units are provided at intervals along a first direction.

The heat treatment device according to the present invention has the effect of smoothly discharging gas within the furnace because discharge pipes for discharging gas inside the furnace are formed in the upstream section of the holding zone and the heating zone.

According to the present invention, since the lower discharge pipe is formed at the bottom of the furnace, carbon dioxide generated during the manufacturing process of the secondary battery cathode active material can be smoothly discharged.

According to the present invention, the lower discharge pipe is formed in the center of the bottom of the furnace, and a plurality of upper discharge pipes are formed on the ceiling of the furnace, so that the atmosphere inside the furnace can be maintained uniformly. In addition, the plurality of upper discharge pipes allows the furnace to be expanded to have a wide internal space within the range of maintaining a uniform atmosphere inside the furnace, which has the effect of heat treating a large number of materials at once.

In order to heat treat multiple materials simultaneously, a newer can be used as a means of stacking each material. At this time, an opening is formed on the side of the sedge, so that atmospheric gases such as air or oxygen supplied from the outside can smoothly contact the material, and the secondary battery cathode active material can be smoothly generated on the material.

The heat treatment apparatus of the present invention has a first length, which is the distance between the inner walls in the width direction (first direction) in the x-axis direction of the furnace, a second length, which is the distance between the sides of the furnace in the first direction, and both ends of the furnace and the furnace. A third length, which is the gap between the inner walls of the roller, a fourth length, which is the gap between the unit units consisting of a pair of rows and a plurality of rows in a plurality of rows and columns, and a third direction that is the z-axis direction. A ratio relationship is set between the first height, which is the height from the center to the top surface of the ceiling surface inside the furnace, and the second height, which is the height of the new unit stacked in plural stages along the second direction, which is the z-axis direction, and these set conditions are set. By satisfying this, it can contribute to improving the yield of materials by forming a uniform atmosphere in which temperature deviation, gas distribution deviation, gas pressure deviation, etc. are maintained constant.

1 is a schematic diagram of the overall configuration of the present invention.
Figure 2 is a cross-sectional view of the heat treatment device of the present invention.
Figure 3 is a cross-sectional view of the heat treatment apparatus in Figure 2 at a different position.
Figure 4 is a schematic plan view showing the arrangement of a plurality of furnace blocks in the heat treatment apparatus of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to some of the described embodiments, and may be implemented in various forms, and at least one of the components between the embodiments within the scope of the technical idea of the present invention is selectively combined and/or can be replaced.

In addition, unless specifically defined, terms in the embodiments of the present invention may be interpreted as meanings that can be generally understood by those with ordinary knowledge, and commonly used terms may be used in consideration of the contextual meaning of the related technology. It can be interpreted.

In addition, the terms in the embodiments of the present invention are for description of the embodiments and do not limit the present invention, and the singular may be interpreted as the plural unless otherwise specified in the text.

In addition, in the components of the embodiment of the present invention, terms such as first, second, third, or A, B, C, etc. may be used, and these terms are intended to distinguish one component from other components. However, there are no restrictions on the order or sequence.

In addition, in embodiments of the present invention, description of one component as “connected”, “connected”, “coupled”, etc. with another component means that one component is directly connected to another component, It can mean not only being connected or combined, but also indirectly connected, connected, or combined by another component between two components.

In addition, in an embodiment of the present invention, one component being disposed, formed, or located above or below, above or below another component means that one component is directly or indirectly placed, formed, or positioned on the other component. This may include location. Expressions for up or down, up or down, can mean not only the upward direction but also the downward direction based on one component.

The continuous roller hearth type heat treatment device according to the present invention includes a preheating zone that transfers the material using rollers and preheats the material, a holding zone that heat-treats the material preheated in the preheating zone at a high temperature, and a cooling zone of the high temperature material. In a heat treatment device comprised of a cooling zone, a heating zone is formed between the preheating zone and the holding zone to heat the material to a high temperature, and in the preheating zone and the heating zone, a room temperature gas and a preheated gas are supplied to the furnace (heat treatment). It is injected into the furnace, and a supply pipe is formed on the bottom of the furnace in the direction in which the high-temperature gas moves, and an discharge pipe is formed on the ceiling of the furnace so that the treated material reacts smoothly with the atmospheric gas.

Figure 1 is a schematic diagram of the overall configuration of the present invention, and Figure 2 is a cross-sectional view of the heat treatment apparatus of the present invention.

Referring to Figures 1 and 2, the present invention includes a preheating zone (1) for transferring the material and preheating the material, a holding zone (3) for performing heat treatment at a high temperature on the material preheated in the preheating zone (1), It is a heat treatment device comprised of a cooling zone (4) for cooling a high-temperature material. A heating zone (2) is formed between the preheating zone (1) and the holding zone (3) to heat the material to a high temperature. High-temperature gas can be injected into the zone 1 and the heating zone 2 into the furnace forming the heat treatment device.

A supply pipe 10 through which high-temperature gas is supplied is formed on the bottom of the furnace, and an upper discharge pipe 11 is formed on the ceiling of the furnace to minimize power loss due to gas circulation.

A roller 6 for transporting the material can be provided inside the furnace, the transport speed of the material can be easily adjusted, and heat treatment can be performed uniformly regardless of the front, rear, or top and bottom of the material.

In addition, the uppermost surface inside the furnace body 30 may be formed as a flat or curved surface. For example, if it is formed as a curved surface as in an embodiment of the present invention, the exhaust characteristics of the fluid can be improved. In other words, the occurrence of turbulence during fluid flow can be prevented and the residence time of the fluid for heat treatment can be secured.

The material is usually heated to around 100°C in the preheating zone (1), and in this case, the material is preheated using high temperature gas of around 120°C.

In the graph of Figure 1, the horizontal axis may represent length (l), and the vertical axis may represent temperature (t).

In the heating zone (2), the temperature of the material is raised to 950~1250℃ using an electric heater, and then in the holding zone (3), heat treatment is performed by maintaining the temperature of the material at a temperature similar to that of the heating zone (2), and finally, In the cooling zone (4), the material can be cooled using low-temperature gas.

High-temperature gas that has been used to cool the material in the cooling zone (4) is injected into the preheating zone (1) and heating zone (2), and a separate heating device may be additionally provided to increase the gas temperature if necessary.

A supply pipe (10) for injecting gas into the preheating zone (1) and heating zone (2) is formed on the bottom of the furnace, and an upper discharge pipe (11) is formed on the ceiling of the furnace, so that high-temperature air tends to rise upward. The gas entering through (10) exchanges heat with the material and can be naturally discharged through the upper discharge pipe (11).

Gas discharged to the outside through the upper discharge pipe 11 can be easily discharged by the blower 12.

In the case of a heat treatment device, if gas discharge does not occur quickly, the heat treatment effect of the material may be reduced, so the two upper discharge pipes 11 can provide relatively fast gas supply and exhaust.

A temperature sensor capable of measuring the temperature of the gas discharged can be attached to one side of the upper discharge pipe 11, and the temperature of the gas discharged from the two upper discharge pipes 11 is averaged to determine the relative temperature of the gas. If the temperature is low, it is desirable to reduce the flow rate of the gas supplied from the supply pipe 10 and discharged from the exhaust pipe 11, and if the temperature of the gas is relatively high, it is desirable to increase the flow rate of the gas supplied and discharged.

If temperature deviation, gas distribution deviation, gas pressure deviation, etc. are reduced, the heat treatment quality of the material becomes uniform. Additionally, if temperature deviation, gas pressure deviation, etc. are reduced, the internal space of the furnace in which the material is accommodated may be expanded. When an expanded internal space is provided, the number of materials input into the furnace can be increased, which is advantageous for mass production.

In lithium secondary batteries, the cathode active material is dependent on the pre-synthesis material preparation method and synthesis process. For mass production, a method of producing cathode active materials through solid-phase reaction using a calcination furnace is being adopted.

The firing furnace process using a heat treatment device is a method of first pulverizing and mixing well-mixed precursors into a porous ceramic container (new) and then synthesizing them in a high-temperature local firing furnace. Since the particle size, distribution, and crystal structure of the obtained positive electrode active material vary depending on the temperature inside the kiln, the atmospheric gas, and the synthesis time, it is very important to control the temperature distribution inside the kiln and the flow state of the reaction gas.

Cathode active materials such as LiCoO ₂ (lithium cobalt oxide) are easy to synthesize, have a gradual change in potential, and have excellent conductivity, so they are mainly used in secondary batteries.

Referring to Figures 1 and 2, the upper discharge pipe 11 and the lower discharge pipe 13 may be formed at set positions in order to improve the temperature distribution deviation inside the furnace.

For example, upper and lower discharge pipes 11 and 13 may be formed in the heating zone 2. For example, the upper and lower discharge pipes 11 and 13 may be formed in the entire area of the heating zone 2. In detail, each of the upper and lower discharge pipes 11 and 13 is spaced apart at a predetermined interval and may be disposed in the inlet or outlet area of the heating zone 2. In addition, the upper discharge pipe 11 and the lower discharge pipe 13 may be further formed in the holding zone (3). For example, each of the upper and lower discharge pipes 11 and 13 may be formed in a partial area of the holding zone 3. In detail, the upper and lower discharge pipes 11 and 13 may be further formed in the upstream section (u) of the maintenance zone (3). Accordingly, the temperature distribution deviation for the process in each of the heating zone 2 and the holding zone 3 can be minimized, impurity gases can be effectively discharged, and the phenomenon of lowering the partial pressure of oxygen can be minimized.

Differently, in order to improve the distribution deviation of the gas supplied to the inside of the furnace, the discharge pipes 11 and 13 that discharge the gas within the furnace body 30 are located in a partial section on the heating zone 2 side of the maintenance zone 3. It can be formed in the upstream section and heating zone (2).

The discharge pipes 11 and 13 may include a plurality of upper discharge pipes 11 provided on the ceiling of the furnace body 30 and a lower discharge pipe 13 formed on the bottom of the furnace body 30.

The lower discharge pipe 13 may be formed across the heating zone 2 and the upstream section u. The upper discharge pipe 11 may be formed only in the middle section (c) of the heating zone (2) among the sections from the heating zone (2) to the upstream section (u). The upper discharge pipe 11 may be excluded from the inlet and outlet portions of the heating zone 2.

Various exhaust gases lighter than air may be generated in section (c) in the center of the heating zone (2). The impurity gas may be discharged to the outside through the upper discharge pipe 11 formed in section (c).

If the installation location of the upper discharge pipe 11 is formed over the heating zone 2 and the upstream section (u), oxygen may be excessively discharged through the upper discharge pipe 11 and the partial pressure of oxygen may be lowered. According to an embodiment of the present invention, the upper discharge pipe 11 is formed only in section (c), so the phenomenon of lowering the partial pressure of oxygen can be minimized.

The upper discharge pipe (11) formed only in section (c) prevents a decrease in the partial pressure of oxygen, and the partial pressure of carbon dioxide is sufficiently reduced due to the lower discharge pipe (18) formed throughout the heating zone (2) and the upstream section (u). Therefore, the particle size of LiCoO2 is reduced, and the synthesis reaction of LiCoO2 can proceed smoothly.

Based on the third direction (z-axis direction), the upper discharge pipe 11 and the lower discharge pipe 13 may not overlap each other or may partially overlap each other. In the case of partial overlap, the upper discharge pipe 11 may overlap (based on the second direction (y-axis direction)) within 15% or less of the lower discharge pipe 13.

In addition, based on the first direction (x-axis direction), the widths of the upper discharge pipe 11 and the lower discharge pipe 13 may be different from each other, and the width of the upper discharge pipe 11 may be smaller than the width of the lower discharge pipe 13. there is.

In addition, the upper discharge pipe 11 communicates with the inside of the furnace body 30, has an inclined first surface 11a, and is connected to the furnace body 30 along the third direction (z-axis direction) from the first surface 11a. It may be formed of a second surface 11b with a constant width in the first direction (x-axis direction) toward the outer upper part of . In addition, the height of the first surface 11a may be lower than the height of the second surface 11b based on the height direction, which is the third direction. More specifically, the height of the first surface 11a may be lower than that of the second surface 11b. It can be set to 50% or less than the height.

A plurality of upper discharge pipes 11 having an inclined first surface 11a are provided in the third direction, so that rapid changes in flow rate can be controlled when discharging the atmospheric gas, which is the fluid inside the furnace body 30. ) can stably flow the atmospheric gas supplied into the interior of the furnace, and accordingly, the material in the sager 5 introduced into the furnace body 30 can be heat treated more satisfactorily. Additionally, the gas distribution inside the furnace body 30 becomes uniform, and temperature deviation can be reduced. By improving the uniformity of gas distribution and temperature deviation, the internal space of the furnace body 30 through which the material flows can be expanded. Therefore, a greater number of new vehicles can be transported using the expanded inner space of the furnace.

Lithium carbonate (Li ₂ CO ₃ ), cobalt oxide (Co ₃ O ₄ ), and oxygen (O ₂ ) may exist in the heating zone (2). For example, lithium carbonate, cobalt oxide, and oxygen may be injected into the heating zone 2 in a gaseous state. Alternatively, lithium carbonate and cobalt oxide may be applied to the material and put into the heating zone 2 together with the material. Lithium carbonate and cobalt oxide can also be the materials themselves.

The lower discharge pipe 13 can lower the partial pressure of by-products of the chemical reaction between lithium carbonate, cobalt oxide, and oxygen, especially carbon dioxide (CO ₂ ).

The lower discharge pipe 13 may be formed at a lower position than the material located within the furnace body 30.

Additionally, the lower discharge pipe 13 may be formed at a lower position than the support means for supporting the material inside the furnace body 30. The support means may include a roller 6 for transporting the material.

Carbon dioxide, which is heavier than air, falls downward within the furnace body 30 and can be discharged to the outside through the lower discharge pipe 13. According to the lower discharge pipe 13 through which carbon dioxide is discharged, the partial pressure of carbon dioxide in the furnace body 30 can be lowered.

To ensure that the partial pressure of carbon dioxide in the furnace body 30 is uniform, the lower discharge pipe 13 may be formed in the middle of the bottom of the furnace. Specifically, when the material is transported along the second direction, which is the y-axis direction, the lower discharge pipe 13 may be formed in the center of the furnace body 30 in the third direction, which is the z-axis direction perpendicular to the first direction. .

Referring to Figure 2 or Figure 4, in order to maintain uniformity of gas distribution, a plurality of upper discharge pipes 11 are formed along a first direction, which is the x-axis direction perpendicular to the second direction, which is the flow direction of the material and the y-axis direction. It can be. At this time, the plurality of upper discharge pipes 11 may be formed at positions symmetrical with respect to the center line c1 of the furnace body 30 along the first direction.

In this case, the gas distribution inside the furnace becomes uniform and the temperature deviation can be reduced. By improving the uniformity of gas distribution and temperature deviation, the space inside the furnace through which materials flow can be expanded. Therefore, a greater number of saggers can be transported using the expanded inner space of the furnace.

The sagger (5) can be input into the furnace body (30) with the material stored therein. To ensure that the chemical reaction of each material is not limited due to multiple stacked sagers, the sagger can be formed into a special structure.

Reactive gases such as oxygen and air injected from the supply pipe 10 may contact the material through the opening formed in the new material and cause a chemical reaction.

Referring to FIG. 3, a lower supply pipe 17 through which high-temperature gas is injected into the heating zone 2 may be formed on the bottom of the furnace body 30.

The lower supply pipes 17 may be arranged in plurality at intervals in a direction perpendicular to the direction of movement of the sagers 5 that enter and are transported into the furnace body 30 (width direction of the furnace body 30).

For example, the lower supply pipe 17 includes a plurality of lower supply pipes at intervals along the width direction of the x-axis direction (first direction) of the furnace body 30, that is, a first lower supply pipe 17a, a second lower supply pipe ( 17b) and a third lower supply pipe 17c.

The first lower supply pipe (17a), the second lower supply pipe (17b), and the third lower supply pipe (17c) may each be a unit supply pipe composed of a plurality of branch supply pipes, and the second lower supply pipe is disposed in the center of the plurality of lower supply pipes. The gas supplied into the furnace body 30 through the supply pipe 17b can move directly toward the ceiling of the furnace body 30 where the upper discharge pipe 11 is formed.

In addition, the first lower supply pipe 17a and the third lower supply pipe 17c, respectively disposed on both sides of the second lower supply pipe 17b, can travel around the inner wall 31 of the furnace and move to the upper discharge pipe 11. .

Referring to Figures 2 to 4, the furnace body 30 can be formed as a whole by connecting a plurality of furnace blocks 60 to each other. Each furnace block 60 has a plurality of upper discharge pipes 11 and lower discharge pipes 13 through which gas is discharged, side supply pipes 16 and lower supply pipes 17 through which high-temperature gas is supplied, and a heater for heating the material. An upper heater 18 and a lower heater 19 may be provided.

A plurality of upper discharge pipes 11 may be formed on the ceiling of the furnace body 30, and a lower discharge pipe 13 and a lower supply pipe 17 may be formed on the bottom of the furnace body 30.

Additionally, a plurality of side supply pipes 16 may be formed on both sides of the furnace body 30.

The side supply pipe 16 can be placed at a set position on the side. For example, based on the first direction (x-axis direction), the side supply pipe 16 may be arranged in an area that corresponds to the sagger 5 and may be arranged in an area that does not correspond to the roller 6.

Additionally, the side supply pipes 16 may be provided in plurality in the third direction in proportion to the sagers 5 stacked in multiple layers along the third direction (z-axis direction). That is, for example, if the number of stacked layers of the new unit 5 is three, the three side supply pipes 16 may be arranged to be spaced apart from each other in proportion to this.

The upper heater 18 may be spaced apart from a position higher than the saddle 5 transported by the roller 6, and the lower heater 19 may be spaced apart from the lower part of the roller 6.

The plurality of side supply pipes 16 are connected to the side supply connection pipe 15 so that high-temperature gas can be supplied.

Here, the present invention is characterized by improving the arrangement relationship between the sledgehammer 5 installed inside the furnace body 30 and the roller 6 that transports the sledgehammer 5.

The sagers 5 may be arranged in a plurality of rows along the first direction (width direction of the furnace) along the there is. That is, the first direction may be a direction in which they are arranged in columns, and the third direction may be a direction in which they are arranged in columns.

As the transport distance of the sagers 5 increases, if the sagers 5 are arranged in multiple tiers and rows, the good alignment of the sagers 5 may not be maintained. Additionally, in the above case, temperature uniformity characteristics inside the furnace may deteriorate, resulting in temperature deviation in areas in the first to third directions. In this case, the thermal energy provided to each of the plurality of sagers 5 may be different, which may cause a problem in which the physical properties of the materials provided inside the sagers 5 are different from each other.

Therefore, in the present invention, even if the sagger 5 is arranged and transported in a plurality of stages and rows through the specifications of the furnace body 30 and the arrangement relationship between the rollers 6 and the sagger 5, the alignment is not easily disturbed and the sagger 5 is uniform. By allowing heat to be provided, the temperature distribution inside the furnace can be improved.

Specifically, the roller 6 may be spaced apart from the upper heater 18 and the lower heater 19 at different intervals in the third direction (z-axis direction). For example, the roller 6 may be placed closer to the lower heater 19 than the upper heater 18 in consideration of the flow characteristics of the supplied and discharged fluid and the thermal energy uniformity characteristics provided to the plurality of sagers 5. there is.

In addition, the distance between the inner walls 31 in the first direction (width direction) in the x-axis direction of the furnace body 30 is referred to as the first length d1, and the distance between the inner walls 31 in the first direction of the furnace body 30 is ( The distance of 5) is the second length (d2), the interval between both ends of the sagger (5) and the inner wall 31 of the furnace body 30 is the third length (d3), and are arranged in a plurality of rows and stages. In the new unit, the gap between the new unit units 5a, which are composed of at least one pair of rows and a plurality of stages, can be defined as the fourth length d4.

In addition, the height from the center of the roller 6 along the third direction, which is the z-axis direction, to the uppermost surface 32 of the ceiling surface inside the furnace body 30 is the first height h1, and z from the center of the roller 6. When defining the height of the sagers 5 stacked in a plurality of stages along the third axial direction as the second height h2, the following ratio relationship can be set.

The ratio of the second length d2 to the first length d1 can be set to 80% to 95%, more preferably 85% to 95%, and even more preferably 90% to 95%. That is, d2/d1=80% to 95%, or 85% to 95%, or 90% to 95% can be set (first standard).

The ratio of the third length d3 to the first length d1 can be set to 1% to 10%, preferably 1% to 5%. That is, d3/d1=1% to 10% or 1% to 5% can be set (second standard).

Additionally, the ratio of the second height (h2) to the first height (h1) can be set to 20% to 40%, more preferably 25% to 35%, and even more preferably 28% to 35%. That is, h2/h1=20% to 40%, or 25% to 35%, or 28% to 35% (third standard).

If at least one of the first to third criteria is satisfied, a uniform heat source can be provided to the sagers 5 arranged in at least one row and stage and the materials disposed within the sagers 5, and various Sagers (5) can be arranged in rows and tiers.

In other words, when the first direction (x-axis direction), which is the width direction of the furnace body 30, is called the column direction, and the third direction (z-axis direction), which is the height direction of the furnace body 30, is called the single direction, Saeger (5) can be arranged in various numbers of rows and tiers.

Meanwhile, when n pieces 5 are arranged in the column direction (first direction, x-axis direction) inside the furnace, some of the n pieces 5 facing in the first direction are in contact with each other in the first direction, It can form a unit 5a, and in this case, if the number of new units 5a is m, m may be half of n. That is, m=n/2 may be possible.

If the n pieces (5) are all spaced apart in the first direction, the length in the width direction, which is the first direction of the furnace, increases, and conversely, the n pieces (5) are all in contact with each other in the first direction. In this case, when the sledgehammer 5 is transported by rotation of the roller 6, the alignment of the sledgehammer 5 may be disturbed. When the sagers 5 arranged in a plurality of rows and tiers are all transported in a state of contact, the sagers 5 may be affected by each other due to vibration that may occur during transport, and the alignment may be disturbed.

For example, n Saeger units 5 are one Saeger unit 5a stacked in 2*3 units (2 in the X-axis direction in the column direction and 3 in the Z-axis direction in the unidirectional direction) as shown in FIG. 3. can be placed and spaced apart from each other.

In detail, a first sagger unit and a second sagger unit disposed adjacent to the inner surfaces of both sides of the furnace may be disposed on the roller 6, and a third sagger unit may be disposed between the first and second sagger units. . At this time, if a plurality of sagger unit units 5a are provided in a plurality in contact with each other in the first direction (x-axis direction) without leaving a gap, the alignment of the sagger units 5a may be poor during transport.

Accordingly, a plurality of sagittal units 5a may be provided with a fourth length d4 spaced apart from each other. In addition, in the first and second sagger units, the third length d3 is greater than the fourth length d4 in order to provide uniform heat energy to the saggers 5 disposed adjacent to the inner surfaces of both sides of the furnace. You can have it. In detail, considering the heat energy reflected on the inner side of the furnace, the third length d3 may be longer than the fourth length d4.

Additionally, the ratio of the fourth length d4 to the third length d3 can be set to 15% to 30%, preferably 20% to 30%. That is, d4/d3=15% to 30%, or 20% to 30% can be set (fourth standard).

If it deviates from the fourth standard, the length in the width direction, which is the first direction of the furnace body 30, increases, so it may be inefficient and the uniformity of temperature distribution may deteriorate. That is, uniform heat energy is provided to each of the plurality of sagers 5 arranged on the inner center area of the furnace body 30 and the plurality of sagers 5 arranged on the inner edge area of the furnace adjacent to the inner side of the furnace. For this purpose, the third and fourth lengths d3 and d4 may satisfy the above-mentioned range.

Additionally, for smooth flow of fluid supplied therein, the upper discharge pipe 11 may be disposed in an area corresponding to the area where the new unit units 5a are spaced apart. In detail, based on the third direction, the center of the upper discharge pipe 11 may be arranged to overlap the spaced area where the sagger unit 5a is spaced apart in the first direction.

The number of side supply pipes 16 provided on the side of the furnace body 30 may be the same as or less than the number of stacked sagers 5.

For example, if the number of stages of the new unit 5 is three, the side supply pipes 16 may be provided in three or fewer, two or one stages. In other words, the number of side supply pipes 16 may not exceed the number of new units.

Additionally, the side supply pipe 16 may be placed at a set location. In detail, the center of the side supply pipe disposed at the top in the third direction may be disposed above the uppermost surface of the new unit or may be disposed on the same plane. Accordingly, the gas supplied through the side supply pipe 16 exchanges heat with the material contained in the sedge 5 disposed at the top and can be naturally discharged through the upper discharge pipe 11.

In addition, when the sedge 5 is provided in a plurality of stages and a plurality of side supply pipes 16 are also provided in proportion, each side supply pipe 16 may be disposed at a set position.

For example, among the plurality of side supply pipes 16, the first side supply pipe disposed at the lower portion closest to the roller 6 will be disposed at a position whose center corresponds to the newer 5 located at the first stage in the first direction. You can. Additionally, the center of the second side supply pipe disposed on the first side supply pipe may be disposed at a position corresponding to the newer 5 located in the second stage in the first direction. In addition, the center of the third side supply pipe disposed on the second side supply pipe and closest to the ceiling surface of the furnace body 30 may be located above the sagers 5 located in the third stage.

At this time, the height in the third direction between the bottom surface of the new unit 5 located in the third stage and the center of the third side supply pipe is greater than the height in the third direction between the bottom surface of the new unit 5 located in the second stage and the center of the second side supply pipe. It can be big.

In addition, the height in the third direction between the bottom surface of the new unit 5 located in the second stage and the center of the third side supply pipe is greater than the height in the third direction between the bottom surface of the new unit 5 located in the first stage and the center of the second side supply pipe. It can be big.

Accordingly, even when a plurality of sagers 5 are arranged in a plurality of stages on the roller 6, uniform heat energy can be provided to the sagger 5 and the material contained in the sagger 5, and the plurality of sagers 5 can be provided. Improved process efficiency can be obtained by simultaneously performing heat treatment on the new material (5).

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. In addition, the features, structures, effects, etc. of each embodiment can be combined or modified for other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description focuses on the embodiments, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiments. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences related to application should be construed as being included in the scope of the present invention as defined in the appended claims.

1... preheating zone 2... heating zone
3... Holding zone 4... Cooling zone
5... new 5a... new monomer
6... roller
10... supply pipe 11... upper discharge pipe
12...blower
13... lower outlet pipe 15... side supply connector
16... side supply pipe
17... lower supply pipe 17a... first lower supply pipe
17b... second lower supply pipe 17c... third lower supply pipe
18... upper heater 19... lower heater
30... furnace body 31... inner wall
32... Top 60... Furnace block
c1... center line
d1... first length d2... second length
d3... third length d4... fourth length
h1... first height h2... second height

Claims (8)

A furnace body that transfers and heat-treats the material;
A new device that stores and moves materials inside the furnace body;
A roller for transporting the new material;
a heater disposed at a location spaced apart from the new unit; Including,
The new rollers placed on the rollers are provided in plural numbers,
When the first direction, which is the width direction of the furnace body, is called the row direction, and the third direction, which is the height direction of the furnace body, is called the single direction, at least one pair of adjacent rows and plurality of units are arranged in a plurality of rows and stages. It forms a new unit with the stages of
A heat treatment device in which the Sager unit is provided in plural numbers at intervals along a first direction.
According to claim 1,
The distance between the inner walls of the furnace body in the first direction, which is the direction perpendicular to the transport direction of the saddle and the width direction of the furnace body, is referred to as the first length, and the distance between both ends of the plurality of saddles is referred to as the second length. When it comes to length,
A heat treatment device wherein the second length is 80% to 95% of the first length.
According to claim 1,
When defining the distance between both ends of the Saeger unit and the inner wall of the furnace body along the first direction, which is the width direction of the furnace body, as the third length, the ratio of the third length to the first length is 1%. Heat treatment unit formed by ~10%.
According to claim 1,
A first height is the height from the center of the roller to the uppermost surface of the ceiling inside the furnace body along the third direction, which is the height direction of the furnace body, and a height of a new height of a plurality of stages stacked along the third direction is a first height. 2 When defining height,
A heat treatment device wherein the ratio of the second height to the first height is 20% to 40%.
According to claim 1,
When the n pieces are arranged in the first direction, which is the direction perpendicular to the transport direction of the pieces and the width direction of the furnace body, some of the n pieces contact each other to form a piece unit,
A heat treatment device wherein the number of Sager units is 1/2 of the n number of stages.
According to claim 1,
The gap between both ends of the new girder and the inner wall of the furnace body is referred to as the third length,
When defining the gap between the Saeger units as the fourth length,
A heat treatment device wherein the ratio of the fourth length to the third length is 15% to 30%.
According to claim 1,
A side supply pipe is provided on the side of the furnace body,
The center of the side supply pipe is disposed above or on the same plane as the uppermost surface of the furnace in the third direction, which is the height direction of the furnace body,
A heat treatment device in which the side supply pipe is disposed at a position spaced apart from the roller.
According to claim 1,
A side supply pipe is provided on the side of the furnace body,
The heat treatment apparatus wherein the number of side supply pipes is equal to or less than the number of stages provided in a plurality of stages in a third direction, which is the height direction of the furnace body.

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