Negative electrode material production device

Abstract

The utility model provides a negative electrode material production device. The negative electrode material production device comprises: a heating granulation assembly, the heating granulation assembly comprises a vertical granulation kettle, and a paddle structure is arranged in the vertical granulation kettle; the feeding assembly is used for feeding a negative electrode raw material into the vertical granulation kettle, and the vertical granulation kettle is used for performing granulation treatment on the negative electrode raw material to generate a secondary particle material; a carbonization assembly; and the feeding assembly is connected with the heating granulation assembly and the carbonization assembly and used for conveying the secondary particle materials to the carbonization assembly, and the carbonization assembly is used for conducting carbonization treatment on the secondary particle materials. According to the utility model, the problem of low production efficiency of the cathode material in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative material production technical field, specifically, relate to a negative material production device. BACKGROUND

[0002] The new energy automobile of electromotion is the future development direction of automobile market, and its core component is lithium ion battery. With the promulgation and implementation of battery regulations, the ESG (Environmental, Social and Governance) concept has become a universally recognized standard and general language, and the society begins to pay attention to the products meeting the ESG concept, and the negative material technical field as the environment-friendly material meets the ESG concept, therefore, more demands are generated for the negative material and its production.

[0003] Artificial graphite as an important form of battery negative material is widely concerned due to its high capacity, high rate performance and long cycle life. In the production process of artificial graphite, granulation and pre-carbonization process are important in artificial graphitization production process, which directly affect the performance and cost of the final product, and the granulation process is an effective modification method to improve the rate performance of battery materials.

[0004] The existing granulation process is mainly vertical kettle, horizontal kettle, roller furnace, continuous kettle process, coke raw material as aggregate, asphalt as binder, rolling heating granulation in the equipment, finally forming secondary particles. The existing pre-carbonization process mainly adopts tunnel kiln for pre-carbonization, and the material is filled in the crucible for heating, and the pre-carbonized material is obtained after the volatile matter is discharged. However, the existing granulation process has the problems of low production capacity, high energy consumption, low product compaction density, poor granulation effect and the like, and due to the separation of the granulation process and the pre-carbonization process, manual transportation is needed in the middle, the labor cost is high, the production automation ability is poor, and the production efficiency of the negative material is greatly affected.

[0005] From the above, it can be seen that the production efficiency of the negative material in the prior art is low. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a negative material production device to solve the problem of low production efficiency of negative material in the prior art.

[0007] In order to achieve the above object, the utility model provides a negative material production device, include: heating granulation subassembly, heating granulation subassembly includes vertical granulator, paddle structure is provided in vertical granulator, throw material subassembly, throw material subassembly is used for throwing negative raw material to vertical granulator, vertical granulator is used for granulating treatment to negative raw material to generate secondary granule material, carbonization subassembly, feed assembly, feed assembly is connected with heating granulation subassembly and carbonization subassembly respectively, is used for conveying secondary granule material to carbonization subassembly, carbonization subassembly is used for carbonization treatment to secondary granule material.

[0008] Further, the paddle structure includes: a rotating shaft, the rotating shaft is vertically arranged, a rotating mechanism is arranged at the top of the vertical granulator, and the top end of the rotating shaft is drivingly connected with the rotating mechanism; and / or a first blade and a second blade, the first blade and the second blade are sequentially arranged on the rotating shaft from top to bottom, wherein the first blade is arranged upwardly inclined, and the second blade is arranged downwardly inclined.

[0009] Further, the paddle structure further includes a U-shaped frame, the U-shaped frame is arranged with an opening upwardly and is connected with the bottom end of the rotating shaft, and at least a part of the second blade is located within the range of the U-shaped frame.

[0010] Further, the heating granulation subassembly further includes a plurality of heating pieces, and the plurality of heating pieces are arranged on the vertical granulator in intervals from top to bottom.

[0011] Further, the vertical granulator has a plurality of heating sections from top to bottom, the plurality of heating sections are arranged in one-to-one correspondence with the plurality of heating pieces, and the heating temperatures of the heating sections are different.

[0012] Further, the paddle structure includes a rotating shaft, a first blade and a second blade, the rotating shaft is vertically arranged, the first blade and the second blade are sequentially arranged on the rotating shaft from top to bottom, the first blade is arranged upwardly inclined, and the second blade is arranged downwardly inclined, wherein the plurality of heating sections are divided into a first group and a second group from top to bottom, the first blade is arranged in correspondence with the first group, and the second blade is arranged in correspondence with the second group.

[0013] Further, the feed assembly is a shaftless double-helix feed structure.

[0014] Further, the carbonization subassembly includes a carbonization rotary kiln, and the carbonization rotary kiln includes: a rotary kiln inner container; a gas heating sleeve, which is sleeved on the rotary kiln inner container; and a recovery pipeline, which is in communication with the rotary kiln inner container and the gas heating sleeve and is used for recovering and conveying volatile components in the rotary kiln inner container to the gas heating sleeve.

[0015] Further, the carbonization rotary kiln further includes a plurality of filter pieces, and the plurality of filter pieces are arranged in parallel in the recovery pipeline and are used for filtering the volatile components.

[0016] Further, the negative electrode material production device further comprises: a cooling kettle, the cooling kettle being used for cooling carbonized material generated by the carbonization assembly; and / or a first discharge airlock, the first discharge airlock being connected with the carbonization assembly and the cooling kettle respectively; and / or a second discharge airlock, the second discharge airlock being arranged at an outlet end of the cooling kettle and being used for outputting granulated carbonized products.

[0017] The technical scheme of the utility model is applied to the negative electrode material production device, which comprises a heating granulation assembly, a feeding assembly, a carbonization assembly and a feeding assembly. The heating granulation assembly comprises a vertical granulation kettle, the vertical granulation kettle is internally provided with a paddle structure, the feeding assembly is used for feeding negative electrode raw materials into the vertical granulation kettle, the vertical granulation kettle is used for granulating the negative electrode raw materials to generate secondary granular materials, the feeding assembly is connected with the heating granulation assembly and the carbonization assembly respectively and is used for conveying the secondary granular materials to the carbonization assembly, and the carbonization assembly is used for carbonizing the secondary granular materials. In this way, the heating granulation assembly and the carbonization assembly are connected together to form an integrated arrangement, so that the granulation process and the carbonization process are combined together, manual transportation is avoided, labor cost is reduced, production automation capability is improved, and the production efficiency of the negative electrode material is greatly improved, thereby solving the problem of low production efficiency of the negative electrode material in the prior art. Further, the vertical granulation kettle is adopted and the paddle structure is arranged inside, so that the negative electrode raw materials can be more fully tumbled to better heat and bond to generate secondary particles, thereby improving the granulation effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the present application, and together with the description of the present application, explain the present application, and do not limit the present application. In the drawings:

[0019] Figure 1 Fig. 1 shows a structure schematic view of a negative electrode material production device in one specific embodiment of the present application;

[0020] Figure 2 Fig. 2 shows a structure schematic view of a heating granulation assembly in one specific embodiment of the present application;

[0021] Figure 3 Fig. 3 shows a structure schematic view of a paddle structure in one specific embodiment of the present application;

[0022] Figure 4 Fig. 4 shows a structure schematic view of a carbonization assembly in one specific embodiment of the present application.

[0023] In the above drawings, the following reference signs are used:

[0024] 10. Heating granulation assembly; 11. Vertical granulation kettle; 12. Paddle structure; 121. Rotating shaft; 122. First blade; 123. Second blade; 124. U-shaped frame; 13. Rotating mechanism; 14. Heating element; 15. Feed pipe; 20. Carbonization assembly; 21. Rotary kiln liner; 22. Gas heating jacket; 221. Burner; 23. Recovery pipeline; 24. Filter element; 30. Feeding assembly; 40. Cooling kettle; 50. First discharge air shut-off fan; 60. Second discharge air shut-off fan; 70. Third discharge air shut-off fan. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] To address the problem of low production efficiency of anode materials in existing technologies, this invention provides an anode material production apparatus.

[0030] like Figures 1 to 2 As shown, the anode material production apparatus includes a heating granulation component 10, a feeding component, a carbonization component 20, and a feed assembly 30. The heating granulation component 10 includes a vertical granulation vessel 11, within which a paddle structure 12 is installed. The feeding component is used to feed anode raw materials into the vertical granulation vessel 11. The vertical granulation vessel 11 is used to granulate the anode raw materials to generate secondary particulate material. The feed assembly 30 is connected to both the heating granulation component 10 and the carbonization component 20, and is used to convey the secondary particulate material to the carbonization component 20. The carbonization component 20 is used to carbonize the secondary particulate material.

[0031] By setting the negative electrode material production device including a heating granulation assembly 10, a feeding assembly, a carbonization assembly 20 and a feeding assembly 30, the heating granulation assembly 10 includes a vertical granulation kettle 11, the vertical granulation kettle 11 is provided with a paddle structure 12, the feeding assembly is used for feeding the negative electrode raw material into the vertical granulation kettle 11, the vertical granulation kettle 11 is used for granulating the negative electrode raw material to generate secondary particle material, the feeding assembly 30 is connected with the heating granulation assembly 10 and the carbonization assembly 20 respectively, and is used for conveying the secondary particle material to the carbonization assembly 20, the carbonization assembly 20 is used for carbonizing the secondary particle material, so that the heating granulation assembly 10 and the carbonization assembly 20 are connected together to form an integrated arrangement, so as to combine the granulation process and the carbonization process together, avoid manual transportation, reduce labor cost, improve production automation capability, and further greatly improve the production efficiency of the negative electrode material. Further, by using the vertical granulation kettle 11 and internally providing the paddle structure 12, the negative electrode raw material can be more fully tumbled to better heat and bond to generate secondary particles, thereby improving the granulation effect. The above process can also be used for pre-carbonization of the material, and the obtained product can be further carbonized to adapt to different material preparation processes.

[0032] As shown in Figures 2 to 3 , the paddle structure 12 includes a rotating shaft 121, a first blade 122 and a second blade 123. The rotating shaft 121 is vertically arranged, and the top of the vertical granulation kettle 11 is provided with a rotating mechanism 13, the top end of the rotating shaft 121 is drivingly connected with the rotating mechanism 13, so that the rotating shaft 121 can rotate under the driving of the rotating mechanism 13, and further drive the first blade 122 and the second blade 123 to rotate. The first blade 122 and the second blade 123 are sequentially arranged on the rotating shaft 121 from top to bottom, wherein the first blade 122 is inclined upward, and the second blade 123 is inclined downward. It can be understood that, from the side view, the first blade 122 is similar to an upward V-shaped, and the second blade 123 is similar to a downward V-shaped.

[0033] It can be understood that, in order to fully tumble the negative electrode raw material, the first blade 122 and the second blade 123 are both multiple, and the multiple first blades 122 and the multiple second blades 123 are respectively arranged at intervals along the rotating shaft 121.

[0034] In the embodiment, the paddle structure 12 is helical after rotation. The thickness of the first blade 122 and the second blade 123 is 8 to 10 mm. Further, the rotating speed of the paddle structure 12 ranges from 0 to 50 rpm.

[0035] Further, as shown in Figure 3As shown, the paddle structure 12 further comprises a U-shaped frame 124, which is arranged with an upward opening and is connected to the bottom end of the rotating shaft 121, and at least a part of the second blade 123 is located within the range of the U-shaped frame 124. It can be understood that the middle part of the U-shaped frame 124 is connected to the bottom end of the rotating shaft 121, so that the U-shaped frame 124 can rotate around the rotating shaft 121 as the center. By further arranging the U-shaped frame 124 on the basis of the two blades, the negative material can be more fully rolled, and the granulation effect can be improved.

[0036] As shown in the figure, Figure 2 The heating and granulation assembly 10 further comprises a plurality of heating elements 14, which are arranged on the vertical granulation kettle 11 from top to bottom. In this embodiment, the heating element 14 is a resistance heating element. Further, the heating element 14 comprises two sub-heating elements, which are respectively located on both sides of the vertical granulation kettle 11.

[0037] In this embodiment, the vertical granulation kettle 11 has a plurality of heating sections from top to bottom, and the plurality of heating sections are arranged one by one corresponding to the plurality of heating elements 14, and the heating temperature of each heating section is different. That is, the inside of the vertical granulation kettle 11 has a plurality of temperature zones.

[0038] In this embodiment, the plurality of heating sections are divided into a first group and a second group from top to bottom, the first blade 122 is arranged corresponding to the first group, and the second blade 123 is arranged corresponding to the second group.

[0039] In one specific embodiment, the heating element 14 is four, that is, the vertical granulation kettle 11 has four heating sections from top to bottom, and has four temperature zones inside. The temperature range of the temperature zone is 0-700℃. That is, the vertical granulation kettle 11 in this embodiment can be provided with four different temperature sections for granulation production.

[0040] Further, the upper and lower parts of the vertical granulation kettle 11 respectively have two temperature zones. Among them, the temperature of the two temperature zones of the upper part can be two of 200℃, 250℃, 300℃, 350℃ or 400℃. At this temperature, the raw material pitch of the negative material such as artificial graphite begins to soften and is bonded and granulated, and at the same time, under the rotation of the first blade 122 which is inclined upward, the material is uniformly dispersed upward for bonding, the bonding frequency between the particles is enhanced, the granulation effect is enhanced, and the secondary particle size is larger. Correspondingly, the temperature of the two temperature zones of the lower part can be two of 450℃, 500℃ or 550℃. At this temperature, the pitch begins to solidify, and at the same time, under the rotation of the second blade 123 which is inclined downward, the extrusion force can be increased, the bonding strength between the particles can be enhanced, the secondary particle porosity can be smaller, and the density can be higher. Through the above arrangement, the granulation effect of the vertical granulation kettle 11 is enhanced.

[0041] In the embodiment, the paddle structure 12 is made of 304 or 310S stainless steel alloy material.

[0042] Since the discharge of the granulation kettle is extremely viscous, the conventional conveying system, such as the airlock, screw and other equipment, cannot normally convey, which can cause blockage and cannot continuously produce. In the embodiment, the feeding assembly 30 is a shaftless double-screw feeding structure. Through the above arrangement, the conveying effect can be enhanced, the blockage problem can be solved, and continuous production can be ensured.

[0043] As shown in Figure 4 The carbonization assembly 20 includes a carbonization rotary kiln, and the carbonization rotary kiln includes a rotary kiln liner 21, a gas heating jacket 22 and a recovery pipeline 23. The gas heating jacket 22 is sleeved on the rotary kiln liner 21. The recovery pipeline 23 communicates with the rotary kiln liner 21 and the gas heating jacket 22, respectively, and is used for recovering and conveying the volatile components in the rotary kiln liner 21 to the gas heating jacket 22. Specifically, a fan is further arranged on the recovery pipeline 23, which is used for extracting the volatile components in the rotary kiln liner 21. Through the above arrangement, the volatile components generated in the carbonization process can be fully utilized, so that the volatile components can assist in heating, thereby reducing energy consumption.

[0044] In the embodiment, the fuel of the gas heating jacket 22 is natural gas. As shown in Figure 4 The gas heating jacket 22 includes a plurality of burners 221, which are arranged in groups of two to form a plurality of groups, and the recovery pipeline 23 includes a plurality of branches, which are respectively communicated with the plurality of groups of burners 221, so as to convey the volatile components to the burners 221 for auxiliary combustion heating.

[0045] As shown in Figure 4 The carbonization rotary kiln further includes a plurality of filter elements 24, which are arranged in parallel in the recovery pipeline 23 and are used for filtering the volatile components. Specifically, the filter element 24 includes a filter screen, which can effectively filter impurities in the volatile components. In the embodiment, the pore size of the filter screen is 5-10 μm. Further, the plurality of filter elements 24 are in one-to-one backup or one-to-multiple backup form. During normal production, only one of the filter elements 24 is used to intercept the material, and under continuous operation, the filter screen will be blocked. Therefore, the filter system has a pressure monitoring function. When the pressure is greater than or equal to 200 Pa, the backup filter element 24 is switched to filter, which can ensure continuous production.

[0046] In the embodiment, the material of the rotary kiln liner 21 is SUS314 stainless steel alloy. Further, the material of the metal filter screen can also be SUS314 stainless steel alloy.

[0047] As shown in Figure 1 The negative electrode material production device further includes a cooling kettle 40, which is used for cooling the carbonized material generated by the carbonization assembly 20.

[0048] As shown in Figure 1 The negative electrode material production device further comprises a first discharge airlock 50 and a second discharge airlock 60. The first discharge airlock 50 is connected to the carbonization assembly 20 and the cooling kettle 40 respectively. The second discharge airlock 60 is arranged at the outlet end of the cooling kettle 40 and is used to output the granulated carbonized product.

[0049] As shown in Figure 1 The negative electrode material production device further comprises a third discharge airlock 70, which is arranged at the feeding assembly 30. The vertical granulating kettle 11 has a discharge pipe 15 at the bottom, and the secondary granular material is discharged from the discharge pipe 15 and then transported to the carbonization assembly 20 through the third discharge airlock 70 and the feeding assembly 30.

[0050] The production process of the negative electrode material production device in the present application is as follows:

[0051] The coke powder and the binder are mixed to form the negative electrode raw material. The feeding assembly continuously feeds the negative electrode raw material into the vertical granulating kettle 11 at a preset feeding speed for granulation. The negative electrode raw material is heated and bonded under the tumbling of the paddle structure 12 to form secondary particles. The granulated secondary particles are discharged from the discharge pipe 15 to the third discharge airlock 70 for control, and then enter the carbonization rotary kiln through the shaftless double-helix feeding assembly 30 for high-temperature carbonization to discharge volatile components. The carbonized material is transported by the first discharge airlock 50 to the cooling kettle 40 for cooling. The cooled material is discharged by the second discharge airlock 60 to obtain the granulated carbonized product. During the operation of the device, the volatile components generated by the material in the rotary kiln liner 21 are filtered by the filter 24, and the pure volatile components are extracted by the recovery pipeline 23 to the gas heating jacket 22 for combustion by the burner 221 to assist heating.

[0052] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: through setting negative electrode material production device including heating granulation assembly 10, feeding assembly, carbonization assembly 20 and feeding assembly 30, heating granulation assembly 10 includes vertical granulator 11, vertical granulator 11 is provided with paddle structure 12, feeding assembly is used to pour negative electrode raw material into vertical granulator 11, vertical granulator 11 is used to granulate negative electrode raw material to generate secondary granular material, feeding assembly 30 is connected with heating granulation assembly 10 and carbonization assembly 20 respectively, and is used to deliver secondary granular material to carbonization assembly 20, carbonization assembly 20 is used to carbonize secondary granular material, so that heating granulation assembly 10 and carbonization assembly 20 are connected together to form integrated arrangement, so that granulation process and carbonization process are combined together, manual transportation is avoided, manual cost is reduced, production automation ability is improved, and then the production efficiency of negative electrode material is greatly improved.Further, by adopting vertical granulator 11 and setting paddle structure 12 inside, negative electrode raw material can be more fully tumbled to better heat and bond to generate secondary particles, so as to improve the granulation effect.The above process can also be used for pre-carbonization treatment of the material, and the obtained product can be further carbonized to adapt to the preparation process of different materials.

[0053] It is to be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein specify the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0055] The above only describes the preferred embodiments of the utility model, and is not intended to limit the utility model, and for those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A negative electrode material production apparatus, characterized in that, include: Heating granulation assembly (10), the heating granulation assembly (10) includes a vertical granulation vessel (11), the vertical granulation vessel (11) is provided with a paddle structure (12); Feeding component, the feeding component is used to feed negative electrode raw materials into the vertical granulation kettle (11), the vertical granulation kettle (11) is used to granulate the negative electrode raw materials to generate secondary particulate materials; Carbonized components (20); The feeding assembly (30) is connected to the heating granulation assembly (10) and the carbonization assembly (20) respectively, and is used to transport the secondary particulate material to the carbonization assembly (20), which is used to carbonize the secondary particulate material.

2. The anode material production apparatus according to claim 1, characterized in that, The blade structure (12) includes: A rotating shaft (121) is vertically arranged, and a rotating mechanism (13) is provided at the top of the vertical granulation vessel (11). The top end of the rotating shaft (121) is drivenly connected to the rotating mechanism (13); and / or The first blade (122) and the second blade (123) are arranged sequentially from top to bottom on the rotating shaft (121), wherein the first blade (122) is inclined upward and the second blade (123) is inclined downward.

3. The anode material production apparatus according to claim 2, characterized in that, The blade structure (12) further includes a U-shaped frame (124), which is arranged with its opening facing upward and is connected to the bottom end of the rotating shaft (121), and at least a portion of the second blade (123) is located within the range of the U-shaped frame (124).

4. The anode material production apparatus according to claim 1, characterized in that, The heating granulation assembly (10) also includes heating elements (14), and there are multiple heating elements (14) arranged at intervals from top to bottom on the vertical granulation vessel (11).

5. The anode material production apparatus according to claim 4, characterized in that, The vertical granulation vessel (11) has multiple heating sections from top to bottom, and each heating section is respectively arranged in correspondence with a number of heating elements (14), with each heating section having a different heating temperature.

6. The anode material production apparatus according to claim 5, characterized in that, The blade structure (12) includes a rotating shaft (121), a first blade (122), and a second blade (123). The rotating shaft (121) is vertically arranged. The first blade (122) and the second blade (123) are arranged sequentially from top to bottom on the rotating shaft (121). The first blade (122) is inclined upward, and the second blade (123) is inclined downward. The plurality of heating sections are divided into a first group and a second group, which are located above and below each other. The first blade (122) is arranged corresponding to the first group, and the second blade (123) is arranged corresponding to the second group.

7. The anode material production apparatus according to claim 1, characterized in that, The feeding assembly (30) is a shaftless double-helix feeding structure.

8. The anode material production apparatus according to claim 1, characterized in that, The carbonization assembly (20) includes a carbonization rotary kiln, the carbonization rotary kiln comprising: Rotary kiln liner (21); Gas heating jacket (22), the gas heating jacket (22) is fitted onto the inner liner (21) of the rotary kiln; The recovery pipeline (23) is connected to the rotary kiln liner (21) and the gas heating jacket (22) respectively, and is used to recover and transport the volatiles in the rotary kiln liner (21) to the gas heating jacket (22).

9. The anode material production apparatus according to claim 8, characterized in that, The carbonization rotary kiln also includes a filter element (24), and there are multiple filter elements (24) connected in parallel in the recovery pipeline (23) for filtering the volatiles.

10. The anode material production apparatus according to any one of claims 1 to 9, characterized in that, The negative electrode material production apparatus also includes: Cooling vessel (40), said cooling vessel (40) being used to cool the carbonized material produced by said carbonization component (20); and / or A first discharge airlock (50) is connected to the carbonization assembly (20) and the cooling kettle (40) respectively; and / or The second discharge air shut-off fan (60) is located at the outlet end of the cooling kettle (40) and is used to output granulated carbonized products.

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