Kiln-type furnace apparatus with sealed structure

Abstract

The present invention relates to a kiln-type furnace apparatus having a sealed structure, which is capable of creating an oxygen-free atmosphere in a furnace in order to prevent fire and explosion accidents in the furnace during a calcination process from among waste-battery recycling processes. In an embodiment, provided is the furnace apparatus comprising a rotating body which is rotated to agitate a raw material supplied therein, wherein the rotating body comprises: a rotating portion sequentially provided with a heating region in which the raw material is heated and a cooling region in which the raw material heated while passing through the heating region is cooled down; a fixing portion comprising a first fixing chamber and a second fixing chamber respectively connected to both ends of the rotating portion, and supporting the rotating portion; sealing portions which are provided to sides where the rotating portion and the fixing portion are coupled and prevent air inflow into the rotating portion; a raw material supply portion which is connected to the first fixing chamber and supplies the raw material to the rotating portion; and a raw material discharge portion which is connected to the second fixing chamber and discharges the raw material calcinated in the rotating portion.

Description

Kiln-type kiln device with a sealed structure

[0001] The present invention relates to a kiln-type firing furnace device having a sealed structure.

[0002] With the recent proliferation of electric vehicles, demand for electric vehicle batteries is increasing. At the same time, interest in recycling used batteries that have reached the end of their useful life and are no longer functioning properly is also growing.

[0003] Spent batteries for electric vehicles are recycled by recovering valuable metals such as lithium, nickel, cobalt, manganese, and copper. During this process, a calcination process is performed to remove organic matter, such as electrolytes, for reuse. However, the calcination facility frequently experiences fires and explosions due to oxygen ingress during operation. Furthermore, improper calcination can lead to excessive TOC (Total Organic Carbon) levels in wastewater and products, resulting in various problems.

[0004] (Special Document) KR 10-2022-0116827 A

[0005] The present invention is intended to solve the above problems, and relates to a kiln-type kiln device having a sealed structure capable of creating an oxygen-free atmosphere inside the kiln to prevent fire and explosion accidents in the kiln during the kiln process in the waste battery recycling process.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following kiln device.

[0007] In one embodiment, the present invention provides a kiln device including a rotating body that rotates to stir raw materials supplied therein, the rotating body having a rotating section sequentially provided with a heating zone in which the raw materials are heated and a cooling zone in which the heated raw materials pass through the heating zone and cool the raw materials, a first fixed chamber and a second fixed chamber that are respectively connected to both ends of the rotating section, a fixed section that supports the rotating section, a sealing section that is provided on a side where the rotating section and the fixed section are coupled and is provided to prevent air from entering the interior of the rotating section, a raw material supply section that is connected to the first fixed chamber and supplies the raw materials to the rotating section, and a raw material discharge section that is connected to the second fixed chamber and discharges raw materials fired from the rotating section.

[0008] In one embodiment, the sealing part may include a sealing ring having a ring shape surrounding the rotating body and having a receiving space therein to receive a disk protruding outward from the rotating body, a packing member provided inside the sealing ring and compressing both sides of the disk, an elastic member connected to one end of the packing member and compressing the packing member toward the disk, and a connecting member connecting the sealing ring and the fixing member and preventing air from entering the interior of the rotating body.

[0009] In one embodiment, the connecting member may be at least partially constructed of a flexible material that expands or contracts along with longitudinal movement of the rotating body.

[0010] In one embodiment, the accommodation space may be larger than the disk to accommodate radial movement of the rotating body.

[0011] In one embodiment, the raw material supply unit includes a first supply hopper for storing raw materials, a second supply hopper connected to the first supply hopper and receiving a preset amount of the raw materials from the first supply hopper by a first rotary valve and storing the raw materials, and a first screw feeder connected to the second supply hopper and receiving a preset amount of the raw materials from the second supply hopper by a second rotary valve and transferring the raw materials to the rotating body, wherein the preset amounts of the first rotary valve and the second rotary valve may be the same.

[0012] In one embodiment, the first supply hopper and the second supply hopper each include a load cell that measures the load of the raw material stored therein, and the first supply hopper and the second supply hopper may be provided such that the amount of the raw material stored therein measured by the load cell is greater than a preset numerical range.

[0013] In one embodiment, the first screw feeder includes a cylindrical housing, a screw provided inside the housing and transporting the raw material, a supply motor provided at one end of the housing and rotating the screw, and a rotation control unit connected to the supply motor and controlling the rotation speed of the screw, wherein the rotation control unit can control the rotation speed of the screw so that the amount of the raw material delivered by the first rotary valve and the second rotary valve is the same as the amount of the raw material transported into the interior of the rotary body by the screw.

[0014] In one embodiment, the raw material discharge unit may include a first discharge hopper for storing the discharged raw material, a second discharge hopper connected to the first discharge hopper and receiving and storing the raw material from the first discharge hopper, and a second screw feeder connecting the first discharge hopper and the second discharge hopper and installed at an angle from a plane parallel to the ground.

[0015] In one embodiment, the second screw feeder may be inclined so that the side connected to the first discharge hopper is closer to the ground than the side connected to the second discharge hopper.

[0016] In one embodiment, the raw material discharge unit is connected to the second discharge hopper and may further include a pneumatic conveying device that transports the raw material received from the second discharge hopper using gas.

[0017] In one embodiment, the device may further include a pressure gauge for measuring the pressure inside the rotating body, a thermometer for measuring the temperature inside the rotating body, and an oxygen concentration gauge for measuring the concentration of oxygen flowing inside the rotating body.

[0018] In one embodiment, the device may further include a nitrogen supply device for supplying nitrogen gas, a control valve for controlling the amount of nitrogen gas supplied from the nitrogen supply device, and a nitrogen supply pipe connecting the nitrogen supply device and the rotating body.

[0019] In one embodiment, the control valve can be controlled to supply nitrogen gas when the pressure measured by the pressure gauge falls below the lower limit of a preset numerical range.

[0020] In one embodiment, the cooling area may further include a cooling water spray device that sprays cooling water onto the outer surface of the rotating body.

[0021] According to one embodiment of the present invention, an oxygen-free atmosphere can be created in a kiln during a kiln process during a waste battery recycling process to prevent fire and explosion accidents.

[0022] In addition, according to one embodiment of the present invention, the heating unit and the cooling unit are formed as one unit in a single kiln instead of being configured in two stages, thereby enabling scale-up of the kiln.

[0023] Figure 1 is a schematic plan view of a kiln device according to one embodiment of the present invention.

[0024] Figure 2 is an enlarged plan view of part A, which is a sealing portion according to one embodiment of the present invention.

[0025] FIG. 3 is a diagram showing the state of use of a sealing part according to an embodiment of the present invention when the rotating body according to an embodiment of the present invention moves in the longitudinal direction.

[0026] FIG. 4 is a diagram showing the state of use of a sealing part according to an embodiment of the present invention when a rotating body according to an embodiment of the present invention moves in the radial direction.

[0027] Figure 5 is an enlarged plan view of a raw material supply unit according to one embodiment of the present invention.

[0028] Figure 6 is an enlarged plan view of a raw material discharge unit according to one embodiment of the present invention.

[0029] * Explanation of symbols *

[0030] 10: Kiln device 100: Rotating part

[0031] 110: Rotating body 120: Heating zone

[0032] 130: Cooling area 131: Coolant injection device

[0033] 200: Fixed part 210: First fixed chamber

[0034] 220: Second fixed chamber 300: Sealing part

[0035] 310: Sealing ring 311: Receiving space

[0036] 320: Packing member 330: Elastic member

[0037] 340: connecting member 341: flexible material

[0038] 400: Raw material supply section 410: First supply hopper

[0039] 411: First load cell 412: First rotary valve

[0040] 420: Second supply hopper 421: Second load cell

[0041] 422: Second rotary valve 430: First screw feeder

[0042] 431, 531: Supply motor 432, 532, screw

[0043] 433, 533: Housing 500: Raw material discharge section

[0044] 510: 1st discharge hopper 511: 3rd load cell

[0045] 520: Second discharge hopper 521: Fourth load cell

[0046] 522: 4th rotary valve 530: 2nd screw feeder

[0047] 540: Pneumatic device

[0048] Hereinafter, specific embodiments of the present invention will be described with reference to the attached drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other regressive inventions or other embodiments included within the scope of the spirit of the present invention by adding, modifying, or deleting other components within the scope of the same spirit. However, this will also be considered to be included within the scope of the spirit of the present invention.

[0049] Furthermore, throughout the specification, the term "connected" to another component means not only that the components are "directly connected," but also that they are "indirectly connected" with other components in between. Furthermore, "including" a component does not exclude other components, unless otherwise specifically stated, but rather implies the inclusion of other components.

[0050] In addition, components having the same function within the same scope of the same idea shown in the drawings of each embodiment are described using the same reference numerals.

[0051] FIG. 1 is a schematic plan view illustrating a kiln device (10) according to an embodiment of the present invention. As illustrated in FIG. 1, the kiln device (10) according to an embodiment of the present invention includes a rotating part (100), a fixed part (200), a sealing part (300), a raw material supply part (400), and a raw material discharge part (500), and may be a rotary kiln type kiln that performs a kiln process for raw materials such as black powder.

[0052] A rotating part (100) according to one embodiment of the present invention may include a rotating body (110) that rotates to stir raw materials supplied therein, and the rotating body (110) may be a cylindrical shell. The rotating body (110) is sequentially provided with a heating zone (120) in which the raw materials are heated, and a cooling zone (130) in which the heated raw materials pass through the heating zone (120) and cool the raw materials. At this time, the heating zone (120) may be arranged on the raw material supply side (400), and the cooling zone (130) may be arranged on the raw material discharge side (500). In the past, the heating zone and the cooling zone were configured in two stages, but in the kiln device (10) according to one embodiment of the present invention, the heating zone (120) and the cooling zone (130) are integrally provided inside a single rotating body (110), thereby enabling scale-up of the kiln equipment.

[0053] In addition, the rotating part (100) according to one embodiment of the present invention may be provided such that the rotating body (110) is inclined from a plane parallel to the ground, and the raw material supplied inside the rotating body (110) is heated at a temperature of 500° C. or higher in the heating zone (120) so that a firing process is performed, and may be cooled while passing through the cooling zone (130) along the inclined rotating body (110). A heater (not shown) surrounding the outside of the rotating body (110) may be provided in the heating zone (120), and a separate cooling device (not shown) may be installed inside the rotating body (110) in the cooling zone (130). Furthermore, the firing furnace device (10) according to one embodiment of the present invention may further include a cooling water spraying device (131) that is provided on the cooling zone (130) side and sprays cooling water onto the outer peripheral surface of the rotating body (110). Accordingly, the sintering furnace device (10) according to one embodiment of the present invention can increase the cooling effect by applying an indirect cooling device to the outside of the rotating body (110).

[0054] According to one embodiment of the present invention, a fixed part (200) includes a first fixed chamber (210) and a second fixed chamber (220), which are respectively connected to both ends of the rotating part (100). The first fixed chamber (210) may be provided on the raw material supply part (400) side, and the second fixed chamber (220) may be provided on the raw material discharge part (500) side. At this time, unlike the rotating part (100), the fixed part (200) according to one embodiment of the present invention does not rotate and may be fixed to the ground to support the rotating part (100). At this time, the first fixed chamber (210) may be provided to communicate with the raw material supply part (400), and the second fixed chamber (220) may be provided to communicate with the raw material discharge part (500). In addition, an exhaust duct (not shown) may be installed on one side of the second fixed chamber (220), and exhaust gas generated by firing within the rotating body (110) may be discharged through the exhaust duct (not shown).

[0055] At this time, the firing apparatus (10) according to one embodiment of the present invention can form a positive pressure inside the rotating body (110) so that the firing process can proceed. For example, the firing process can proceed by forming the pressure inside the rotating body (110) in a preset numerical range, and the preset numerical range can be 2 mbar to 15 mbar. Accordingly, the firing apparatus (10) according to one embodiment of the present invention can prevent oxygen from flowing in through the exhaust duct (not shown). Meanwhile, the kiln device (10) according to one embodiment of the present invention may further include a pressure gauge (not shown) that measures the pressure inside the rotating body (110) to maintain positive pressure inside the rotating body (110), and when the pressure measured by the pressure gauge (not shown) is outside a preset numerical range, a fan (not shown) installed on the exhaust duct (not shown) side may be controlled to adjust the pressure within the preset numerical range.

[0056] In addition, the kiln device (10) according to one embodiment of the present invention may further include a thermometer (not shown) for measuring the temperature inside the rotating body (110) and an oxygen concentration meter (not shown) for measuring the concentration of oxygen flowing inside the rotating body (110), and when the oxygen concentration measured by the oxygen concentration meter (not shown) deviates from a preset numerical range, an alarm may be given to the operator and the kiln process may be stopped. At this time, the installation location and structure of the pressure meter (not shown), the thermometer (not shown), and the oxygen concentration meter (not shown) are not limited as long as they can measure the pressure, temperature, and oxygen concentration inside the rotating body (110).

[0057] The sealing part (300) according to one embodiment of the present invention is provided on the side where the rotating part (100) and the fixed part (200) are coupled, and may be provided to prevent air from entering the interior of the rotating part (100). In the past, a problem occurred in which a fire occurred or an explosion occurred as oxygen was introduced into the interior of the rotating body (110) during the firing process. However, the firing furnace device (10) according to one embodiment of the present invention can control the interior of the rotating part (100) to an oxygen-free atmosphere by applying the sealing part (300), and can prevent the problems of fire and explosion. Hereinafter, the specific configuration and use state of the sealing part (300) will be described later with reference to FIGS. 2 to 4.

[0058] The raw material supply unit (400) according to one embodiment of the present invention is connected to the first fixed chamber (210) and supplies the raw material to the rotating unit (100). In addition, the raw material discharge unit (500) according to one embodiment of the present invention is connected to the second fixed chamber (220) and discharges the raw material fired in the rotating unit (100). The specific configuration and function of the raw material supply unit (400) and the raw material discharge unit (500) will be described later with reference to FIGS. 5 and 6.

[0059] Furthermore, the kiln device (10) according to one embodiment of the present invention may further include a nitrogen supply device (600) for supplying nitrogen gas, a control valve (610) for controlling the input amount of nitrogen gas supplied from the nitrogen supply device (600), and a nitrogen supply pipe (611) connecting the nitrogen supply device (600) and the rotating body (110). At this time, the control valve (610) may be a FCV (Flow Control Valve) capable of PID control, and may control to supply nitrogen gas when the pressure measured by the pressure gauge (not shown) becomes lower than the lower limit of a preset numerical range. Accordingly, the kiln device (10) according to one embodiment of the present invention can maintain the inside of the rotating body (110) at a positive pressure during the kiln process.

[0060] That is, the kiln device (10) according to one embodiment of the present invention can be scaled up to 10 tons / h with one kiln facility by sequentially designing the heating zone (120) and the cooling zone (130) in one rotating body (110). In addition, by applying the sealing unit (300), the inside of the rotating body (110) where the kiln process is performed can be controlled to an oxygen-free atmosphere, thereby preventing problems such as fire and explosion. In addition, the kiln device (10) according to one embodiment of the present invention can form the pressure inside the rotating body (110) into positive pressure by the nitrogen supply device (600), and in particular, by supplying the nitrogen gas when the sealing unit (300) breaks down, or when the initial operation or the end of the operation is performed, the inside of the rotating body (110) can be formed into positive pressure, thereby indirectly blocking the inflow of oxygen gas.

[0061] FIGS. 2 to 4 illustrate the specific configuration and usage state of a sealing part (300) according to an embodiment of the present invention. More specifically, FIG. 2 is an enlarged plan view of a sealing part (300) according to an embodiment of the present invention, FIG. 3 is a usage state diagram of a sealing part (300) according to an embodiment of the present invention when moving in the longitudinal direction, and FIG. 4 is a usage state diagram of a sealing part (300) according to an embodiment of the present invention when moving in the radial direction. Hereinafter, a sealing part (300) according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4.

[0062] In addition, the kiln device (10) according to one embodiment of the present invention can be provided with the sealing part (300) in each of the first fixed chamber (210) and the second fixed chamber (220, see FIG. 1), and the same configuration can be applied. Therefore, FIGS. 2 to 4 are described based on the first fixed chamber (210), but the sealing part (300) applied to the second fixed chamber (220, see FIG. 1) can also be described in the same manner.

[0063] A sealing member (300) according to one embodiment of the present invention includes a sealing ring (310) having a ring shape surrounding the rotating body (110) and having a receiving space (311) for receiving a disk (111) protruding outward from the rotating body (110) therein, a packing member (320) provided inside the sealing ring (310) and compressing both sides of the disk (111), an elastic member (330) connected to one end of the packing member (320) and compressing the packing member (320) toward the disk (111), and a connecting member (340) connecting the sealing ring (310) and the fixing member (200, see FIG. 1) and preventing air from entering the interior of the rotating body (110). Here, FIGS. 2 to 4 illustrate that the connecting member (340) connects the sealing ring (310) and the first fixed chamber (210), and similarly, the connecting member (340) can connect the sealing ring (310) and the second fixed chamber (220) to form a sealed structure.

[0064] Meanwhile, air flowing outside the rotating body (110) may flow along the outer surface of the disk (111) into the gap between the first fixed chamber (210) and the rotating body (110), which may cause fire and explosion problems during the firing process. At this time, the packing member (320) may block the air inflow path by vertically compressing the disk (111), and a plurality of packing members (320) may be provided on each side of the disk (111). In addition, the plurality of packing members (320) may be supported by receiving elastic force from the elastic member (330).

[0065] Furthermore, the connecting member (340) according to one embodiment of the present invention may be formed of at least a portion of a flexible material (341) that expands or contracts along with the longitudinal movement of the rotating body (110). Therefore, as illustrated in FIG. 3, the rotating body (110) may move toward the first fixed chamber (210) in the direction of the arrow during the firing process, and at this time, as the flexible material (341) contracts, the sealing portion (300) may be prevented from being twisted or damaged, and a continuous sealed structure may be formed.

[0066] In addition, the accommodation space (311) may be provided to be larger than the disk (111) to accommodate radial movement of the rotating body (110). That is, as illustrated in FIG. 4, the rotating body (110) may move in the radial direction during the sintering process. At this time, since the accommodation space (311) is provided to be larger than the disk (111), movement of the disk (111) within the accommodation space (311) can be accommodated, and distortion or damage of the sealing portion (300) can be prevented, thereby forming a continuous sealed structure. Here, the longitudinal direction may refer to the longitudinal direction of the rotating body (110), and the radial direction may refer to a direction perpendicular to the longitudinal direction and a radial direction of the rotating body (110).

[0067] Accordingly, the kiln device (10) according to one embodiment of the present invention can block oxygen gas flowing into the gap between the rotating part (100) and the fixed part (200) from the outside by the sealing part (300), thereby preventing fire and explosion that may occur during the kiln process. In addition, during the kiln process, movement of the rotating part (100) in the longitudinal direction or the radial direction perpendicular thereto may occur, and thus, problems of damage and distortion of the sealing part (300) may occur. However, the sealing part (300) according to one embodiment of the present invention can accommodate the longitudinal and radial movements of the rotating body (110) while continuously forming a sealed structure.

[0068] FIG. 5 is an enlarged view of a raw material supply unit (400) according to an embodiment of the present invention. Referring to FIG. 5, the raw material supply unit (400) according to an embodiment of the present invention includes a first supply hopper (410) for storing raw materials, a second supply hopper (420) connected to the first supply hopper (410) and receiving and storing the raw materials from the first supply hopper (410), and a first screw feeder (430) connected to the second supply hopper (420) and receiving the raw materials from the second supply hopper (420) and transporting them to the rotating body (110). Since the first screw feeder (430) is provided to penetrate the first fixed chamber (210), the raw materials supplied through the first supply hopper (410) and the second supply hopper (420) can be transferred to the interior of the rotating body (110).

[0069] Meanwhile, the first supply hopper (410) and the second supply hopper (420) may be connected by a first rotary valve (412), and the second supply hopper (420) and the first screw feeder (430) may be connected by a second rotary valve (422). The first rotary valve (412) may transfer a preset amount of the raw material from the first supply hopper (410) to the second supply hopper (420), and similarly, the second rotary valve (422) may transfer a preset amount of the raw material from the second supply hopper (420) to the first screw feeder (430). At this time, the preset amounts of the first rotary valve (412) and the second rotary valve (422) may be the same, thereby enabling continuous discharge of the raw material.

[0070] In addition, the first supply hopper (410) and the second supply hopper (420) may include load cells (411, 421) that measure the load of the raw material stored therein, respectively. More specifically, the first supply hopper (410) may include a first load cell (411), and the second supply hopper (420) may include a second load cell (421). At this time, the first supply hopper (410) and the second supply hopper (420) may be provided so that the amount of the raw material stored therein, measured by the load cells (411, 421), is greater than a preset numerical range. That is, external air may be introduced into the interior of the rotating part (100) together with the raw material supply process through the first supply hopper (410) and the second supply hopper (420), and to block this, raw materials exceeding a preset numerical range may be continuously provided in the first supply hopper (410) and the second supply hopper (420), thereby forming a sealed structure using the raw materials.

[0071] Furthermore, the first screw feeder (430) includes a supply motor (431), a screw (432), a housing (433), and a rotation control unit (not shown). The housing (433) has a cylindrical shape, and the screw (432) transports the raw material inside the housing (433). The supply motor (431) is provided at one end of the housing (433) and can rotate the screw (432), and the rotation control unit (not shown) is connected to the supply motor (431) and can control the rotation speed of the screw (432). At this time, the rotation control unit (not shown) can control the rotation speed of the screw (432) so that the amount of the raw material delivered by the first rotary valve (412) and the second rotary valve (422) and the amount of the raw material transported into the interior of the rotary body (110) by the screw (432) are the same. Accordingly, as the raw material transferred inside the housing (433) is fully filled and transferred, a sealed structure can be formed inside the housing (433). However, this is not limited thereto, and in order to prevent a defect in the first screw feeder (430), the rotation control unit (not shown) can control the rotation speed of the screw (432) so that the amount of the raw material transferred into the inside of the rotating body (110) by the screw (432) is greater than the amount of the raw material transferred by the first rotary valve (412) and the second rotary valve (422).

[0072] FIG. 6 is an enlarged view of a raw material discharge unit (500) according to an embodiment of the present invention. Referring to FIG. 6, the raw material discharge unit (500) according to an embodiment of the present invention includes a first discharge hopper (510) for storing the discharged raw material, a second discharge hopper (520) connected to the first discharge hopper (510) and receiving and storing the raw material from the first discharge hopper (510), and a second screw feeder (530) connecting the first discharge hopper (510) and the second discharge hopper (520) and installed at an angle from a plane parallel to the ground, and since the first discharge hopper (510) is connected to the second fixed chamber (220), the raw material discharged through the first discharge hopper (510) and the second discharge hopper (520) can be discharged to the outside. At this time, the second screw feeder (530) may be provided so that the side connected to the first discharge hopper (510) is closer to the ground than the side connected to the second discharge hopper (520), and thereby, the raw material transported through the second screw feeder (530) may be transported in a direction opposite to the direction of gravity, thereby forming a sealed structure inside the second screw feeder (530).

[0073] The connection between the first discharge hopper (510) and the second fixed chamber (220) can be connected by a discharge pipe, and although not shown in the drawing, a third rotary valve (not shown) can be installed to discharge the raw material by adjusting it to a preset amount. Furthermore, the second discharge hopper (520) can discharge the raw material to the outside in a preset amount by a fourth rotary valve (522). At this time, the preset amounts of the third rotary valve (not shown) and the fourth rotary valve (522) can be the same so as to enable continuous discharge.

[0074] In addition, the first discharge hopper (510) and the second discharge hopper (520) may include load cells (511, 521) for measuring the load of the raw material stored therein, similar to the first supply hopper (410, see FIG. 5) and the second supply hopper (420, see FIG. 5), respectively. More specifically, the first discharge hopper (510) may include a third load cell (511), and the second discharge hopper (520) may include a fourth load cell (521). At this time, the first discharge hopper (510) and the second discharge hopper (520) may be provided so that the amount of the raw material stored therein, measured by the load cells (511, 521), is greater than a preset numerical range. That is, external air may be introduced into the interior of the rotating part (100) together with the raw material discharge process through the first discharge hopper (510) and the second discharge hopper (520), and to block this, raw material exceeding a preset numerical range may be continuously provided in the first discharge hopper (510) and the second discharge hopper (520), thereby forming a sealed structure by the raw material.

[0075] Furthermore, the second screw feeder (530) may have the same configuration as the first screw feeder (430, see FIG. 5), and may include a supply motor (531), a screw (532), a housing (533), and a rotation control unit (not shown). The supply motor (531), the screw (532), the housing (533), and the rotation control unit (not shown) may have the same function as the configuration of the first screw feeder (430, see FIG. 5). At this time, the rotation control unit may control the rotation speed of the screw (532) so that the amount of the raw material transferred from the rotating body (110) to the first discharge hopper (510) and the amount of the raw material transferred to the second discharge hopper (520) by the screw (532) are the same. Accordingly, as the raw material transferred inside the housing (533) is fully filled and transferred, a sealed structure can be formed within the housing (533). However, it is of course not limited to this, as with the first screw feeder (430, see FIG. 5).

[0076] In addition, the raw material discharge unit (500) according to one embodiment of the present invention may further include a pneumatic conveying device (540) that is connected to the second discharge hopper (520) and transports the raw material received from the second discharge hopper (520) using gas. The pneumatic conveying device (540) can facilitate the discharge of the raw material, indirectly cool the raw material, and resolve the problem of raw material accumulation.

[0077] Although the present invention has been described above with reference to examples, the present invention is not limited to the above-described examples, and it goes without saying that modifications can be made and implemented by those skilled in the art without changing the technical idea of ​​the present invention as claimed in the claims.

Claims

1. A rotating body that rotates to stir raw materials supplied internally, and the rotating body has a rotating section sequentially provided with a heating zone in which the raw materials are heated and a cooling zone in which the heated raw materials pass through the heating zone and are cooled; A fixed part including a first fixed chamber and a second fixed chamber respectively connected to both ends of the rotating part, and supporting the rotating part; A sealing portion provided on the side where the rotating portion and the fixed portion are combined and provided to prevent air from entering the interior of the rotating portion; A raw material supply unit connected to the first fixed chamber and supplying the raw material to the rotating unit; and A raw material discharge unit connected to the second fixed chamber and discharging raw material fired in the rotating unit; A sintering device comprising:

2. In paragraph 1, The above sealing part, A sealing ring having a ring shape surrounding the rotating body and having an accommodation space provided therein to accommodate a disk protruding outwardly from the rotating body; A packing member provided inside the sealing ring and pressing both sides of the disk; An elastic member connected to one end of the packing member and pressing the packing member toward the disk; and A connecting member that connects the sealing ring and the fixed part and prevents air from entering the interior of the rotating body; A sintering device comprising:

3. In paragraph 2, The above connecting member is, A kiln device, at least a portion of which is made of a flexible material that expands or contracts along with the longitudinal movement of the rotating body.

4. In paragraph 3, The above accommodation space is, A sintering device having a size larger than the disk to accommodate radial movement of the rotating body.

5. In paragraph 4, The above raw material supply unit, A first supply hopper for storing raw materials; A second supply hopper connected to the first supply hopper and receiving and storing a preset amount of the raw material from the first supply hopper by the first rotary valve; and A first screw feeder connected to the second supply hopper and receiving a preset amount of the raw material from the second supply hopper by a second rotary valve and transferring it to the rotating body; Including, The above first rotary valve and second rotary valve, A kiln device characterized in that the above preset amount is the same.

6. In paragraph 5, The above first supply hopper and second supply hopper, A load cell for measuring the load of the raw materials stored in each; Including, The above first supply hopper and second supply hopper, A kiln device provided so that the amount of raw material stored inside, measured by the load cell, is greater than a preset numerical range.

7. In paragraph 6, The above first screw feeder, Cylindrical housing; A screw provided inside the housing and transporting the raw material; A supply motor provided at one end of the housing and rotating the screw; and A rotation control unit connected to the above supply motor and controlling the rotation speed of the screw; Including, The above rotation control unit, A kiln device characterized in that the rotation speed of the screw is controlled so that the amount of raw material delivered by the first rotary valve and the second rotary valve and the amount of raw material transported into the interior of the rotating body by the screw are the same.

8. In paragraph 5, The above raw material discharge section is, A first discharge hopper for storing the raw material to be discharged; A second discharge hopper connected to the first discharge hopper and receiving and storing the raw material from the first discharge hopper; and A second screw feeder connecting the first discharge hopper and the second discharge hopper and installed at an angle from a plane parallel to the ground; A sintering device comprising:

9. In paragraph 8, The above second screw feeder, A kiln device characterized in that the side connected to the first discharge hopper is inclined so as to be closer to the ground than the side connected to the second discharge hopper.

10. In paragraph 9, The above raw material discharge section is, A pneumatic conveying device connected to the second discharge hopper and transporting the raw material received from the second discharge hopper using gas; A sintering device further comprising:

11. In Article 10, A pressure gauge for measuring the pressure inside the above rotating body; a thermometer for measuring the temperature inside the above rotating body; and An oxygen concentration meter for measuring the concentration of oxygen flowing inside the rotating body; A sintering device further comprising:

12. In paragraph 11, A nitrogen supply device that supplies nitrogen gas; A control valve for controlling the amount of nitrogen gas supplied from the nitrogen supply device; and A nitrogen supply pipe connecting the above nitrogen supply device and the above rotating body; A sintering device further comprising:

13. In paragraph 12, The above control valve, A kiln device characterized in that it controls to supply nitrogen gas when the pressure measured by the above pressure gauge falls below the lower limit of a preset numerical range.

14. In paragraph 13, A cooling water spray device provided on the cooling area side and spraying cooling water onto the outer surface of the rotating body; A sintering device further comprising:

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