Apparatus for firing cathode material of secondary battery

Abstract

A secondary battery cathode material firing device includes a heating section extending in a first horizontal direction, a temperature maintaining section connected to the heating section and extending in the first direction, and a cooling section connected to the temperature maintaining section and extending in a second horizontal direction different from the first direction.

Description

Technology Field

[0001] This description relates to a secondary battery cathode material firing apparatus. Background Technology

[0002] Generally, a secondary battery cathode material firing device is a device that fires a sagger containing cathode material in a firing furnace at a temperature set according to the characteristics of the material.

[0003] A conventional secondary battery cathode material firing device includes a heating section, a temperature maintaining section, and a cooling section that extend in one direction and fire the cathode material housed in a refractory box. The problem to be solved

[0004] One embodiment aims to provide a secondary battery cathode material firing apparatus with increased cathode material production. means of solving the problem

[0005] One aspect provides a secondary battery cathode material firing apparatus for firing a secondary battery cathode material by moving a refractory box containing the secondary battery cathode material in a horizontal direction, comprising: a heating section extended in a first direction in the horizontal direction; a temperature maintaining section connected to the heating section and extended in the first direction; and a cooling section connected to the temperature maintaining section and extended in a second direction different from the first direction in the horizontal direction, wherein the refractory box passes from the heating section through the temperature maintaining section to the cooling section.

[0006] The second direction above may be the opposite direction of the first direction above.

[0007] The above refractory box includes a plurality of refractory boxes, and the plurality of refractory boxes can form a plurality of rows and move in the horizontal direction.

[0008] The thermal spacing between the plurality of refractory boxes in the above temperature maintenance section may be narrower compared to the thermal spacing between the plurality of refractory boxes in the above cooling section.

[0009] The thermal spacing between the plurality of refractory boxes in the cooling section may be wider than the thermal spacing between the plurality of refractory boxes in the temperature maintaining section.

[0010] The width of the horizontal direction of the cooling section may be larger than the width of the horizontal direction of the temperature maintenance section.

[0011] The cooling section may include a first connecting section connected to the temperature maintaining section and extending in a third direction that intersects the first direction and the second direction in the horizontal direction, and a first section connected to the first connecting section and extending in the second direction.

[0012] The temperature of the first section above may be lower than that of the first connecting section above.

[0013] The cooling section may include a second section connected to the temperature maintenance section and extended in the first direction, a second connecting section connected to the second section and extended in a third direction that intersects the first direction and the second direction in the horizontal direction, and a third section connected to the second connecting section and extended in the second direction.

[0014] The temperature of the second section and the third section may be lower than that of the second connecting section.

[0015] The length of the third section above may be longer than the length of the second section above.

[0016] A transfer section connecting the cooling section and the heating section may be further included to transfer the refractory casing from the cooling section to the heating section.

[0017] The temperature of the above temperature maintenance section may be higher than the temperature of the above heating section and the temperature of the above cooling section.

[0018] The above refractory box includes a plurality of refractory boxes, and the temperature maintaining section may include a heating means located between adjacent refractory boxes among the plurality of refractory boxes.

[0019] The above cooling section may include a cooling means located between adjacent refractory boxes among a plurality of refractory boxes. Effects of the invention

[0020] According to one embodiment, a secondary battery cathode material firing apparatus with increased cathode material production is provided. Brief explanation of the drawing

[0021] FIG. 1 is a drawing showing a secondary battery cathode material firing apparatus according to one embodiment. FIG. 2 is a drawing showing a part of a secondary battery cathode material firing apparatus according to one embodiment. FIG. 3 is a diagram showing an example of a plurality of refractory boxes moving from a temperature maintenance section to a cooling section in a secondary battery cathode material firing device according to one embodiment. FIG. 4 is a drawing showing secondary battery cathode material firing apparatus according to another embodiment. FIG. 5 is a drawing showing secondary battery cathode material firing apparatus according to another embodiment. Specific details for implementing the invention

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0023] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0024] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0025] Hereinafter, a secondary battery cathode material firing apparatus according to one embodiment will be described with reference to FIGS. 1 to 3.

[0026] FIG. 1 is a drawing showing a secondary battery cathode material firing apparatus according to one embodiment. FIG. 2 is a drawing showing a part of a secondary battery cathode material firing apparatus according to one embodiment.

[0027] FIGS. 1 and 2 are schematic plan views illustrating a secondary battery cathode material firing apparatus. Although a conventional secondary battery cathode material firing apparatus is also illustrated in FIGS. 1 and 2, the conventional secondary battery cathode material firing apparatus is not limited to the structure illustrated in FIGS. 1 and 2 and may have various known structures.

[0028] Referring to FIGS. 1 and 2, a conventional secondary battery cathode material firing apparatus (10) extends in a first direction (X1) and heats, maintains temperature, and cools a plurality of refractory containers (SA) containing secondary battery cathode materials while moving them in the first direction (X1), thereby firing the secondary battery cathode materials contained in the plurality of refractory containers (SA) by moving them in a vertical direction. The conventional secondary battery cathode material firing apparatus (10) includes a heating section (11), a temperature maintenance section (12), a cooling section (13) connected and extended in the first direction (X1), and a transfer section (14) connecting the cooling section (13) and the heating section (11).

[0029] In order to increase the productivity of the cathode material firing in a conventional secondary battery cathode material firing device (10), methods such as increasing the amount of cathode material input, increasing the firing length, and shortening the firing time can be used.

[0030] Increasing the amount of cathode material input may include increasing the number of rows or stages of the refractory box (SA) containing the cathode material and increasing the weight of the cathode material contained in the refractory box (SA).

[0031] When the number of heats or stages of the refractory chambers (SA) is increased, temperature variations occur in the refractory chambers (SA) due to differences in heat transfer depending on the location of the refractory chambers (SA), resulting in quality variations in the fired anode material.

[0032] When the weight of the anode material stored in the refractory box (SA) is increased, a temperature deviation occurs inside the refractory box (SA) due to the increased size, resulting in a quality deviation in the fired anode material.

[0033] In addition, increasing the number of refractory boxes (SA) and the weight of the cathode material increases the load on the lower structure of the conventional secondary battery cathode material firing device (10). However, if the lower structure includes ceramic material, the increase in the number of refractory boxes (SA) and the weight of the cathode material is limited to a range where damage to the lower structure does not occur, thereby limiting the increase in the production volume of the cathode material.

[0034] Assuming the same firing time, increasing the firing length increases the hourly production rate by increasing the transport speed of the refractory body (SA), but this leads to various equipment-related problems. For example, in the case of a Roller Hearth Kiln (RHK), as the firing length increases, the moving refractory body (SA) becomes skewed, causing misalignment of the refractory body (SA) inside the kiln. As another example, in the case of a Pusher Kiln, as the firing length increases, the frictional force between the base plate and the lower structure increases, making it physically difficult to transport the refractory body (SA) and also difficult to ensure mechanical stability.

[0035] Reducing the firing time is a method of shortening the firing time, which is the residence time of the refractory box (SA) within the firing furnace, by increasing the transfer speed of the refractory box (SA) to increase firing productivity in the firing furnace. Such reduction of the firing time causes various equipment-related problems similar to the increase in firing length described above. Furthermore, the firing time is divided into the heating time, the temperature holding time, and the cooling time; since it is necessary to maintain the set temperature holding time to ensure the firing quality of the cathode material, reducing the firing time is possible by shortening the heating time and the cooling time. In the cooling section (13) compared to the heating section (11) of the secondary battery cathode material firing device (10), cooling is performed by directly injecting cooling gas into the cathode material to cool it, using heat exchange pipes within the firing furnace to cool it, or indirectly cooling the outer perimeter of the firing furnace. However, since the entire refractory box (SA) itself and the cathode material contained within the refractory box (SA) must be cooled, it is difficult to reduce the cooling time in the actual firing furnace. In other words, securing an effective cooling method is necessary to reduce the firing time.

[0036] A secondary battery cathode material firing device (1000) according to one embodiment is described, in which the production volume of cathode material is increased by solving the problems of the conventional secondary battery cathode material firing device (10) described above.

[0037] Referring to FIG. 1 and FIG. 2, a secondary battery cathode material firing apparatus (1000) according to one embodiment fires the cathode material contained in a plurality of refractory containers (SA) containing secondary battery cathode materials that may have various forms such as granules or briquettes by moving them in a horizontal direction, and by raising the temperature, maintaining the temperature, and cooling the cathode material contained in the refractory containers (SA).

[0038] The secondary battery cathode material firing device (1000) includes a heating section (100), a temperature maintenance section (200), a cooling section (300), and a transfer section (400).

[0039] In one embodiment, a plurality of refractory plates (SA) may pass through a cooling section (300) via a temperature maintenance section (200) from a heating section (100), and a plurality of refractory plates (SA) that have passed through the cooling section (300) may be moved back to the heating section (100) via a transfer section (400).

[0040] Multiple refractory plates (SA) form two rows and move horizontally in the heating section (100), temperature maintenance section (200), cooling section (300), and transfer section (400), but are not limited thereto and multiple refractory plates (SA) can form one row or multiple rows and move horizontally. Additionally, multiple refractory plates (SA) can be stacked in a single layer or multiple layers and move horizontally in the heating section (100), temperature maintenance section (200), cooling section (300), and transfer section (400).

[0041] The heating section (100) extends in a first direction (X1) in the horizontal direction. The heating section (100) is a section in which the temperature is raised to a set temperature according to the characteristics of the secondary battery positive material housed in a plurality of refractory boxes (SA). The heating section (100) includes various known heating means for raising the temperature of the secondary battery positive material housed in the refractory boxes (SA) to a set temperature.

[0042] The temperature maintenance section (200) is connected to the heating section (100) and extends in a first direction (X1) in the horizontal direction. The temperature maintenance section (200) is a section that maintains a temperature set according to the characteristics of the secondary battery cathode material. The temperature of the temperature maintenance section (200) may be higher than the temperature of the heating section (100) and the temperature of the cooling section (300). The temperature maintenance section (200) includes various known temperature maintenance means for maintaining the secondary battery cathode material housed in the refractory box (SA) at a set temperature. For example, in FIG. 2, the temperature maintenance section (200) may include a heater (HT) located between adjacent refractory boxes (SA), but is not limited thereto.

[0043] The cooling section (300) is connected to the temperature maintenance section (200) and extends in a horizontal direction to a second direction (X2) different from the first direction (X1). The cooling section (300) is a section for cooling the secondary battery cathode material. The cooling section (300) includes various known cooling means for cooling the secondary battery cathode material housed in a refractory box (SA). For example, in FIG. 2, the cooling section (300) may include, but is not limited to, a cooling means (CO) such as a heat exchange pipe located between adjacent refractory boxes (SA).

[0044] The cooling section (300) extends in a second direction (X2) opposite to the first direction (X1), which is the extension direction of the temperature maintenance section (200). The space between the cooling section (300) and the temperature maintenance section (200) may have a 'U' shape or a curved shape, and at least one of the cooling section (300) and the temperature maintenance section (200) may be curved. For example, the end of the temperature maintenance section (200) may be curved, the end of the cooling section (300) may be curved, or the end of both the temperature maintenance section (200) and the cooling section (300) may be curved so that the cooling section (300) extends in the second direction (X2).

[0045] FIG. 3 is a diagram showing an example of a plurality of refractory boxes moving from a temperature maintenance section to a cooling section in a secondary battery cathode material firing device according to one embodiment.

[0046] Referring to FIG. 3, refractory plates (SA) that form multiple rows and move in a first direction (X1) from a temperature maintenance section (200) can sequentially move to a cooling section (300) through a curved section between the temperature maintenance section (200) and the cooling section (300). The movement of refractory plates (SA) from the temperature maintenance section (200) to the cooling section (300) can be performed using various known moving means, including pushers and rollers, but is not limited thereto.

[0047] Referring to FIG. 2, the cooling section (300) curves from the temperature maintenance section (200), which is extended in the first horizontal direction (X1), and extends in the second horizontal direction (X2), so that the cooling section (300) has a different shape from the temperature maintenance section (200).

[0048] The temperature maintenance section (12) and cooling section (13) of the conventional secondary battery anode material firing device (10) are extended in a first direction (X1), so that the horizontal width of the temperature maintenance section (12) (for example, the width of a third direction (Y) intersecting the first direction (X1) and the second direction (X2)) and the horizontal width of the cooling section (13) are the same. The thermal spacing of the plurality of refractory boxes (SA) of the conventional secondary battery anode material firing device (10) has the same first spacing (GA1) in the temperature maintenance section (12) and the cooling section (13).

[0049] In contrast, in the secondary battery cathode material firing apparatus (1000) according to one embodiment, the horizontal width of the cooling section (300) is larger than the horizontal width of the temperature maintenance section (200). Alternatively, in the secondary battery cathode material firing apparatus (1000) according to one embodiment, the spacing of the conveying means for conveying the refractory boxes (SA) in the cooling section (300) is larger than the spacing of the conveying means for conveying the refractory boxes (SA) in the temperature maintenance section (200). The thermal spacing of the plurality of refractory boxes (SA) of the secondary battery cathode material firing apparatus (1000) according to one embodiment has a first spacing (GA1) in the temperature maintenance section (200) and a second spacing (GA2) that is wider than the first spacing (GA1) in the cooling section (300).

[0050] In a secondary battery cathode material firing apparatus (1000) according to one embodiment, the thermal spacing between a plurality of refractory boxes (SA) in the temperature maintenance section (200) is narrower than the thermal spacing between a plurality of refractory boxes (SA) in the cooling section (300). As a result, the temperature of the secondary battery cathode material housed in the refractory boxes (SA) can be efficiently maintained in the temperature maintenance section (200).

[0051] In a secondary battery cathode material firing apparatus (1000) according to one embodiment, the thermal spacing between a plurality of refractory boxes (SA) in the cooling section (300) is wider than the thermal spacing between a plurality of refractory boxes (SA) in the temperature maintenance section (200). As a result, a cooling means (CO) can be positioned between a plurality of refractory boxes (SA) in the cooling section (300), and the spacing between adjacent refractory boxes (SA) is widened, allowing the secondary battery cathode material contained in the refractory boxes (SA) to be efficiently cooled in the cooling section (300).

[0052] Referring to FIG. 1, the transfer section (400) connects the cooling section (300) and the heating section (100). Through the transfer section (400), a refractory box (SA) containing a calcined anode material can be transferred from the cooling section (300) back to the heating section (100), and the anode material contained in the refractory box (SA) can be discharged to the outside through an outlet located in at least one of the transfer section (400) and the heating section (100).

[0053] A secondary battery cathode material firing apparatus (1000) according to one embodiment includes a heating section (100) and a temperature maintenance section (200) extended in a first horizontal direction (X1), and a cooling section (300) extended in a second horizontal direction (X2) that curves from the temperature maintenance section (200) and is opposite to the first direction (X1), thereby increasing the production volume of cathode material compared to a conventional secondary battery cathode material firing apparatus (10) that is extended in a straight line in the first direction (X1).

[0054] Specifically, a secondary battery cathode material firing apparatus (1000) according to one embodiment includes a heating section (100) and a temperature maintenance section (200) extended in a first direction (X1) and a cooling section (300) extended in a second direction (X2), so that the firing furnace is extended in an overall 'U' shape and the cooling section (300) is separated from the temperature maintenance section (200), thereby shortening the overall length in the first direction (X1) by a shortened length (SL) and saving the overall firing space.

[0055] In addition, the secondary battery anode material firing device (1000) according to one embodiment has a cooling section (300) separated from the temperature maintenance section (200), thereby reducing the transport length of the refractory kiln (SA) in the first direction (X1) by a conveying means such as a roller when the secondary battery anode material firing device (1000) includes an RHK (Roller Hearth Kiln), and reducing the transport length of the refractory kiln (SA) in the first direction (X1) by a pusher when the secondary battery anode material firing device (1000) includes a Pusher kiln, thereby ensuring overall mechanical stability.

[0056] In addition, in the secondary battery cathode material firing apparatus (1000) according to one embodiment, the cooling section (300) is separated from the temperature maintenance section (200), thereby facilitating individual gas supply in the cooling section (300) compared to the heating section (100) and the temperature maintenance section (200), and thus allowing a large amount of air, which is cheaper than oxygen, to be supplied to the cooling section (300), thereby reducing the manufacturing cost of the cathode material and simultaneously improving the cooling effect of the cathode material.

[0057] In addition, in a secondary battery cathode material firing device (1000) according to one embodiment, the cooling section (300) is separated from the temperature maintenance section (200), and the spacing between neighboring refractory boxes (SA) in the cooling section (300) is widened. Consequently, compared to a conventional secondary battery cathode material firing device (10), the cooling of the cathode material contained in the refractory boxes (SA) is improved under the same conditions, and the cooling time in the cooling section (300) is shortened, thereby shortening the overall firing time and increasing the production volume of the cathode material.

[0058] That is, a secondary battery cathode material firing device (1000) is provided that increases the production volume of cathode material by overcoming the mechanical limitations that may occur when the length of the secondary battery cathode material firing furnace is increased.

[0059] A secondary battery cathode material firing device (1000) is provided that can save on gas costs required for cooling in the cooling section (300).

[0060] A secondary battery cathode material firing device (1000) with increased cathode material production is provided by shortening the cooling time in the cooling section (300) to shorten the total firing time.

[0061] Hereinafter, secondary battery cathode material firing apparatuses according to other embodiments will be described with reference to FIG. 4.

[0062] Below, a part different from the secondary battery cathode material firing apparatus according to the above-described embodiment is described.

[0063] FIG. 4 is a drawing showing secondary battery cathode material firing apparatus according to another embodiment. FIG. 4 is a schematic plan view illustrating a secondary battery cathode material firing apparatus. Although a conventional secondary battery cathode material firing apparatus is also illustrated in FIG. 4, the conventional secondary battery cathode material firing apparatus is not limited to the structure illustrated in FIG. 4 and may have various known structures.

[0064] Referring to FIG. 4, a first secondary battery cathode material firing device (1002) and a second secondary battery cathode material firing device (1003) according to another embodiment include a heating section (100), a temperature maintenance section (200), and a cooling section (300).

[0065] The cooling section (300) is connected to the temperature maintenance section (200) and includes a first connecting section (310) that extends in a third direction (Y) that intersects the first direction (X1) and the second direction (X2) in the horizontal direction, and a first section (320) that extends in the second direction (X2) connected to the first connecting section (310). The temperature of the first section (320) may be lower than that of the first connecting section (310), but is not limited thereto.

[0066] For example, a conventional secondary battery cathode material firing device (10) may have a total length of 44.1 m in the first direction (X1) for the heating section (11), the temperature maintenance section (12), and the cooling section (13) extended in the first direction (X1), and may have a total firing time of 20 hours by having a heating time of 4 hours in the heating section (11), a temperature maintenance time of 10 hours in the temperature maintenance section (12), and a cooling time of 6 hours in the cooling section (13). The refractory plate conveying speed of the conventional secondary battery cathode material firing device (10) may be 2.205 m / h, which is 44.1 m / 20 hours.

[0067] The second secondary battery cathode material firing device (1003) may have a heating section (100) and a temperature maintenance section (200) extended in the first direction (X1) with a length of 44.1 m in the first direction (X1), and a cooling section (300) extended in a curved 'U' shape from the temperature maintenance section (200) with a length of 18.9 m in the second direction (X2), and may have a total firing time of 20 hours by having a heating time of 4 hours in the heating section (100), a temperature maintenance time of 10 hours in the temperature maintenance section (200), and a cooling time of 6 hours in the cooling section (300). The refractory box conveying speed of the second secondary battery cathode material firing device (1003) may be 63 m / 20 hours, which is 3.15 m / h.

[0068] In this way, even though the second secondary battery cathode material firing device (1003) has a length of 44.1m in the first direction (X1), the same as the conventional secondary battery cathode material firing device (10), the cooling section (300) is separated from the temperature maintenance section (200) and extended to a length of 18.9m in the second direction (X2), so that the refractory casing transfer speed increases by 43% in the same firing time of 20 hours, and thus the production volume of the cathode material increases by 43%.

[0069] That is, a first secondary battery cathode material firing device (1002) and a second secondary battery cathode material firing device (1003) are provided, with an increased production of cathode material compared to a conventional secondary battery cathode material firing device (10).

[0070] Hereinafter, secondary battery cathode material firing apparatuses according to another embodiment will be described with reference to FIG. 5.

[0071] Below, a part different from the secondary battery cathode material firing apparatus according to the above-described embodiment is described.

[0072] FIG. 5 is a drawing showing secondary battery cathode material firing apparatus according to another embodiment. FIG. 5 is a schematic plan view illustrating a secondary battery cathode material firing apparatus. Although a conventional secondary battery cathode material firing apparatus is also illustrated in FIG. 5, the conventional secondary battery cathode material firing apparatus is not limited to the structure illustrated in FIG. 5 and may have various known structures.

[0073] A third secondary battery cathode material firing device (1004) and a fourth secondary battery cathode material firing device (1005) according to another embodiment include a heating section (100), a temperature maintenance section (200), and a cooling section (300).

[0074] The cooling section (300) includes a second section (330) connected to the temperature maintenance section (200) and extended in a first direction (X1) in a horizontal direction, a second connecting section (340) connected to the second section (330) and extended in a third direction (Y) that intersects the first direction (X1) and the second direction (X2) in a horizontal direction, and a third section (350) connected to the second connecting section (340) and extended in a second direction (X2). The second section (330) and the third section (350) may have a lower temperature than the second connecting section (340), but are not limited thereto. The length of the third section (350) may be longer than the length of the second section (330), but is not limited thereto.

[0075] For example, a conventional secondary battery cathode material firing device (10) may have a total length of 44.1 m in the first direction (X1) for the heating section (11), the temperature maintenance section (12), and the cooling section (13) extended in the first direction (X1), and may have a total firing time of 20 hours by having a heating time of 4 hours in the heating section (11), a temperature maintenance time of 10 hours in the temperature maintenance section (12), and a cooling time of 6 hours in the cooling section (13). The refractory plate conveying speed of the conventional secondary battery cathode material firing device (10) may be 2.205 m / h, which is 44.1 m / 20 hours.

[0076] The fourth secondary battery cathode material firing device (1005) may have a heating section (100) extended in the first direction (X1), a temperature maintenance section (200), and a second section (330) that may have a length of 44.1m in the first direction (X1), and a third section (350) of the cooling section (300) that extends in a curved 'U' shape from the second section (330) of the cooling section (300) may have a length of 14.7m, and may have a heating time of 4 hours in the heating section (100), a temperature maintenance time of 10 hours in the temperature maintenance section (200), a cooling time of 1 hour in the second section (330) of the cooling section (300), and a cooling time of 5 hours in the third section (350), thereby having a total firing time of 20 hours. The refractory box transfer speed of the fourth secondary battery cathode material firing device (1005) is 58.8 m / 20 hours, which can be 2.94 m / h.

[0077] In this way, even though the fourth secondary battery cathode material firing device (1005) has a length of 44.1m in the first direction (X1) that is the same as the conventional secondary battery cathode material firing device (10), the cooling section (300) is separated from the temperature maintenance section (200) and extended to a length of 14.7m in the second direction (X2), so that the refractory casing transfer speed increases by 33% in the same firing time of 20 hours, and thus the production volume of the cathode material increases by 33%.

[0078] That is, a third secondary battery cathode material firing device (1004) and a fourth secondary battery cathode material firing device (1005) are provided, with an increased production of cathode material compared to a conventional secondary battery cathode material firing device (10).

[0079] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0080] Heating section (100), temperature maintenance section (200), cooling section (300)

Claims

Claim 1 A secondary battery cathode material firing apparatus for firing a secondary battery cathode material by moving a refractory container containing the secondary battery cathode material in a horizontal direction, comprising: a heating section extended in a first direction in the horizontal direction; a temperature maintaining section connected to the heating section and extended in the first direction; A secondary battery cathode material firing apparatus connected to the temperature maintenance section and including a cooling section extending in a second direction different from the first direction in the horizontal direction, wherein the refractory chamber passes from the heating section through the temperature maintenance section to the cooling section, wherein the refractory chamber includes a plurality of refractory chambers, wherein the plurality of refractory chambers form a plurality of rows and move in the horizontal direction, wherein the width of the horizontal direction of the cooling section is greater than the width of the horizontal direction of the temperature maintenance section, and the row spacing between the plurality of refractory chambers in the cooling section is wider than the row spacing between the plurality of refractory chambers in the temperature maintenance section, wherein the temperature maintenance section includes a heating means located between adjacent refractory chambers among the plurality of refractory chambers, and the cooling section includes a cooling means located between adjacent refractory chambers among the plurality of refractory chambers, and wherein the cooling section is adjacent to the temperature maintenance section in the horizontal direction. Claim 2 A secondary battery cathode material firing apparatus according to claim 1, wherein the second direction is the opposite direction to the first direction. Claim 3 delete Claim 4 A secondary battery cathode material firing apparatus according to claim 1, wherein the thermal spacing between the plurality of refractory boxes in the temperature maintaining section is narrower than the thermal spacing between the plurality of refractory boxes in the cooling section. Claim 5 delete Claim 6 delete Claim 7 A secondary battery cathode material firing apparatus according to claim 1, wherein the cooling section comprises: a first connecting section connected to the temperature maintaining section and extending in a third direction intersecting the first direction and the second direction in the horizontal direction; and a first section connected to the first connecting section and extending in the second direction. Claim 8 In claim 7, the first section is a secondary battery cathode material firing device having a lower temperature compared to the first connecting section. Claim 9 A secondary battery cathode material firing apparatus according to claim 1, wherein the cooling section comprises: a second section connected to the temperature maintaining section and extended in the first direction; a second connecting section connected to the second section and extended in the third direction intersecting the first direction and the second direction in the horizontal direction; and a third section connected to the second connecting section and extended in the second direction. Claim 10 In claim 9, the second section and the third section are a secondary battery cathode material firing device having a lower temperature compared to the second connecting section. Claim 11 In claim 10, the length of the third section is longer than the length of the second section in a secondary battery cathode material firing apparatus. Claim 12 A secondary battery cathode material firing apparatus according to claim 1, further comprising a transfer section connecting the cooling section and the heating section, and transferring the refractory casing from the cooling section to the heating section. Claim 13 A secondary battery cathode material firing apparatus according to claim 1, wherein the temperature of the temperature maintenance section is higher than the temperature of the temperature increase section and the temperature of the cooling section. Claim 14 delete Claim 15 delete

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