Artificial graphite negative electrode material production system

Abstract

The utility model provides a production system for an artificial graphite negative electrode material. The production system comprises green coke crushing and shaping equipment, asphalt crushing equipment, coating equipment before granulation, granulation equipment, depolymerization equipment, coating equipment before carbonization, finished product mixing equipment and finished product screening and demagnetizing equipment which are communicated with one another, the asphalt crushing equipment comprises an asphalt feeding station, a first rotary iron remover and a jet mill, the first rotary iron remover is arranged between the asphalt feeding station and the jet mill, and the jet mill is communicated with the coating equipment before granulation; the finished product screening and demagnetizing equipment comprises a semi-finished product screen, a plurality of electromagnetic iron removers and a post-iron-removal temporary storage bin, the semi-finished product screen is communicated with the finished product mixing equipment, and the plurality of electromagnetic iron removers are arranged between the semi-finished product screen and the post-iron-removal temporary storage bin in series; the post-iron-removal temporary storage bin is further provided with magnetic substance detection equipment, and the post-iron-removal temporary storage bin is further communicated with the semi-finished product screen. The content of magnetic substances in the finished product can be reduced, and the performance of the graphite negative electrode material is improved.

Description

Technical Field

[0001] The present application relates to battery negative electrode material preparation technology, and in particular to an artificial graphite negative electrode material production system. Background Art

[0002] As environmental and energy challenges become increasingly severe, society's demand for new energy sources is growing, leading to rapid development of new energy material technologies. One important role of new energy materials is their use in battery manufacturing. For example, graphite is commonly used as the negative electrode material for lithium-ion batteries due to its many advantages, including high stability, good conductivity, high specific capacity, and stable charge and discharge performance.

[0003] In related art solutions, graphite materials used in lithium-ion batteries require crushing, purification, grinding, asphalt coating, screening, etc. However, the prepared graphite materials often have poor performance due to the presence of magnetic substances. Utility Model Content

[0004] In order to overcome the above-mentioned defects in the related art, the purpose of this application is to provide an artificial graphite negative electrode material production system, which is conducive to reducing the content of magnetic substances in the graphite negative electrode material, thereby helping to improve the performance of the graphite negative electrode material.

[0005] The present application provides an artificial graphite negative electrode material production system, including a green coke crushing and shaping device, an asphalt crushing device, a pre-granulation coating device, a granulation device, a depolymerization device, a pre-carbonization coating device, a finished product mixing device, and a finished product screening and demagnetization device;

[0006] The green coke crushing and shaping equipment is provided with a green coke feeding station, and the green coke crushing and shaping equipment is connected to the pre-granulation coating equipment;

[0007] The asphalt crushing equipment includes an asphalt feeding station, a first rotary iron remover and an air flow mill, wherein the first rotary iron remover is arranged between the asphalt feeding station and the air flow mill, and the air flow mill is connected to the pre-granulation coating equipment;

[0008] The pre-granulation coating equipment includes a first batching bin, a second batching bin and a first mixer, the first batching bin is connected to the green coke crushing and shaping equipment, the second batching bin is connected to the airflow crusher, the first batching bin and the second batching bin are both connected to the first mixer, and the first mixer is connected to the granulation equipment;

[0009] The granulation equipment is connected to the deagglomeration equipment;

[0010] The depolymerization device is connected to the pre-carbonization coating device;

[0011] The pre-carbonization coating device is connected to the finished product mixing device;

[0012] The finished product mixing equipment is connected to the finished product screening and demagnetization equipment;

[0013] The finished product screening and demagnetization equipment includes a semi-finished product screen, multiple electromagnetic iron removers, and a post-iron removal cache bin. The semi-finished product screen is connected to the finished product mixing equipment, and the multiple electromagnetic iron removers are arranged between the semi-finished product screen and the post-iron removal cache bin; the post-iron removal cache bin is also provided with a magnetic material detection device, and the post-iron removal cache bin is also connected to the semi-finished product screen.

[0014] In one possible implementation, the green coke crushing and shaping equipment also includes a vibrating feeder, a coarse crusher, a green coke drying equipment, a green coke buffer, a mechanical mill, a shaping machine and a green coke ton package machine; the green coke feeding station is connected to the vibrating feeder, the vibrating feeder is connected to the coarse crusher, the coarse crusher is connected to the green coke drying equipment, the green coke drying equipment is connected to the green coke buffer, the green coke buffer is connected to the mechanical mill, the mechanical mill is connected to the shaping machine, the shaping machine is connected to the green coke ton package machine and the pre-granulation coating equipment.

[0015] In a possible implementation, the asphalt crushing equipment also includes an asphalt buffer bin and an asphalt ton package machine, the air flow crusher is connected to the asphalt buffer bin, and the asphalt buffer bin is connected to the asphalt ton package machine and the pre-granulation coating equipment.

[0016] In one possible implementation, the pre-granulation coating equipment also includes a third batching bin, a second rotary iron remover, a pre-granulation coating equipment buffer bin and a pre-granulation coating equipment ton package machine. The third batching bin is connected to the first mixer through the second rotary iron remover, the first mixer is connected to the pre-granulation coating equipment buffer bin, and the pre-granulation coating equipment buffer bin is connected to the pre-granulation coating equipment ton package machine and the granulation equipment.

[0017] In one possible implementation, the granulation equipment includes a granulation loader, a hot reactor, a cooling reactor, a pipe crusher, a granulation equipment buffer bin and a granulation equipment ton package machine. The granulation loader is connected to the buffer bin of the pre-granulation coating equipment, and the granulation loader is also connected to the hot reactor, and the hot reactor is connected to the cooling reactor. The cooling reactor is connected to the granulation equipment buffer bin after passing through the pipe crusher, and the granulation equipment buffer bin is connected to the granulation equipment ton package machine and the depolymerization equipment.

[0018] In one possible implementation, the deaggregation equipment includes a deaggregation loader, a deaggregation machine, a fusion machine, a deaggregation equipment buffer bin and a deaggregation equipment ton bag machine. The deaggregation loader is connected to the granulation equipment buffer bin, the deaggregation loader is also connected to the deaggregator, the deaggregator is connected to the fusion machine, the fusion machine is connected to the deaggregation equipment buffer bin, the deaggregation equipment buffer bin is connected to the deaggregation equipment ton bag machine and the pre-carbonization coating equipment.

[0019] In one possible implementation, the pre-carbonization coating equipment includes two distribution material metering bins, a fourth distribution material bin, a third rotary iron remover, a second mixer, a pre-carbonization coating equipment cache bin and a pre-carbonization coating equipment ton package machine. The two distribution material metering bins are connected to the depolymerization equipment cache bin, and the two distribution material metering bins are also connected to the second mixer. The fourth distribution material bin is connected to the second mixer through the third rotary iron remover, and the second mixer is connected to the pre-carbonization coating equipment cache bin. The pre-carbonization coating equipment cache bin is connected to the pre-carbonization coating equipment ton package machine and the finished product mixing equipment.

[0020] In one possible implementation, the finished product mixing equipment includes multiple finished product mixing equipment feeders, a three-eccentric mixer, a finished product mixing equipment buffer bin and a finished product mixing equipment ton package machine. Multiple finished product mixing equipment feeders are connected to the pre-carbonization coating equipment buffer bin, and multiple finished product mixing equipment feeders are also connected to the three-eccentric mixer. The three-eccentric mixer is connected to the finished product mixing equipment buffer bin, and the finished product mixing equipment buffer bin is connected to the finished product mixing equipment ton package machine and the finished product screening and demagnetization equipment.

[0021] In one possible implementation, the finished product screening and demagnetization equipment also includes a finished product loader, a screening buffer bin, a finished product screen, a finished product buffer bin and a finished product ton package machine. The finished product loader is connected to the finished product mixing equipment buffer bin, and the finished product loader is also connected to the screening buffer bin, and the screening buffer bin is connected to the semi-finished product screen, and the finished product screen is connected to the post-iron removal buffer bin, and the finished product screen is also connected to the finished product ton package machine.

[0022] In a possible implementation, a plurality of the electromagnetic iron removers are connected in series.

[0023] The present application provides an artificial graphite negative electrode material production system, including a green coke crushing and shaping device, an asphalt crushing device, a pre-granulation coating device, a granulation device, a depolymerization device, a pre-carbonization coating device, a finished product mixing device and a finished product screening and demagnetization device; the green coke crushing and shaping device is provided with a green coke feeding station, and the green coke crushing and shaping device is connected to the pre-granulation coating device; the asphalt crushing device includes an asphalt feeding station, a first rotary iron remover and an air flow mill, the first rotary iron remover is arranged between the asphalt feeding station and the air flow mill, and the air flow mill is connected to the pre-granulation coating device; the pre-granulation coating device includes a first batching bin, a second batching bin and a first mixer, and the first batching bin is connected to the green coke crushing and shaping device. The first and second feeding bins are both connected to the first mixer, and the first mixer is connected to the granulating equipment; the granulating equipment is connected to the depolymerization equipment; the depolymerization equipment is connected to the pre-carbonization coating equipment; the pre-carbonization coating equipment is connected to the finished product mixing equipment; the finished product mixing equipment is connected to the finished product screening and demagnetization equipment; the finished product screening and demagnetization equipment includes a semi-finished product screen, multiple electromagnetic iron removers, and a post-ironing buffer bin. The semi-finished product screen is connected to the finished product mixing equipment, and multiple electromagnetic iron removers are arranged in series between the semi-finished product screen and the post-ironing buffer bin; the post-ironing buffer bin is also provided with a magnetic material detection device, and the post-ironing buffer bin is also connected to the semi-finished product screen. The present application sets a first rotating iron remover in the asphalt crushing equipment to remove ferromagnetic substances in the asphalt raw materials, thereby reducing the content of ferromagnetic substances at the source; in addition, multiple electromagnetic iron removers are set in the finished product screening and demagnetization equipment to remove ferromagnetic substances mixed in the finished product, and a magnetic material detection device is set in the post-ironing buffer bin below the electromagnetic iron remover. When it is detected that the magnetic substances mixed in the material exceed the standard, the material can be sent to the semi-finished product screen again for secondary demagnetization, which is beneficial to reduce the content of magnetic substances in the final product and improve the performance of the graphite negative electrode material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A simplified structural diagram of an artificial graphite negative electrode material production system provided in one embodiment of the present application;

[0026] Figure 2 A simplified structural diagram of a coke crushing and shaping device provided in one embodiment of the present application;

[0027] Figure 3A simplified structural diagram of an asphalt crushing device provided in one embodiment of the present application;

[0028] Figure 4 A simplified structural diagram of a pre-granulation coating device provided in one embodiment of the present application;

[0029] Figure 5 A simplified structural diagram of a granulation device provided in one embodiment of the present application;

[0030] Figure 6 A simplified structural diagram of a depolymerization device provided in one embodiment of the present application;

[0031] Figure 7 A simplified structural diagram of a pre-carbonization coating device provided in one embodiment of the present application;

[0032] Figure 8 A simplified structural diagram of a finished product mixing device provided in one embodiment of the present application;

[0033] Figure 9 This is a simplified structural diagram of the finished product screening and demagnetization equipment provided in one embodiment of the application.

[0034] Reference numerals:

[0035] 100- Green coke crushing and shaping equipment; 110- Green coke feeding station; 120- Vibrating feeder; 130- Coke coke coking machine; 140- Green coke drying equipment; 150- Green coke buffer; 160- Mechanical mill; 170- Shaping machine; 180- Green coke per ton charter machine;

[0036] 200-Asphalt crushing equipment; 210-Asphalt feeding station; 220-First rotary iron remover; 230-Air flow mill; 240-Asphalt buffer silo; 250-Asphalt ton charter machine;

[0037] 300-Pre-granulation coating equipment; 310-First batching bin; 320-Second batching bin; 330-Third batching bin; 340-Second rotary iron remover; 350-First mixer; 360-Pre-granulation coating equipment buffer bin; 370-Pre-granulation coating equipment ton charter machine;

[0038] 400-granulation equipment; 410-granulation feeder; 420-thermal reactor; 430-cooling kettle; 440-pipeline crusher; 450-granulation equipment buffer bin; 460-granulation equipment ton charter machine;

[0039] 500-depolymerization equipment; 510-depolymerization loader; 520-depolymerization machine; 530-fusion machine; 540-depolymerization equipment buffer warehouse; 550-depolymerization equipment ton charter;

[0040] 600-Pre-carbonization coating equipment; 610-Distribution material metering bin; 620-Fourth batching bin; 630-Third rotary iron remover; 640-Second mixer; 650-Pre-carbonization coating equipment buffer bin; 660-Pre-carbonization coating equipment ton charter machine;

[0041] 700- Finished product mixing equipment; 710- Finished product mixing equipment loading machine; 720- Triple eccentric mixer; 730- Finished product mixing equipment buffer; 740- Finished product mixing equipment ton charter machine;

[0042] 800-Finished product screening and demagnetization equipment; 810-Finished product loader; 820-Screening buffer bin; 830-Semi-finished product screen; 840-Electromagnetic iron remover; 850-Post-iron removal buffer bin; 860-Finished product screen; 870-Finished product ton charter machine; 880-Magnetic material detection equipment. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0044] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] As described in the background art, the graphite material prepared in the related art solutions often contains a large amount of magnetic substances, resulting in poor performance of the graphite material.

[0046] In view of this, the embodiment of the present application aims to provide a production system for artificial graphite negative electrode materials, which removes ferromagnetic substances from the asphalt raw materials by setting a first rotating iron remover in the asphalt crushing equipment, thereby reducing the content of ferromagnetic substances at the source. In addition, multiple electromagnetic iron removers are set in the finished product screening and demagnetization equipment to remove ferromagnetic substances mixed in the finished product, and a magnetic material detection device is set in the post-iron removal buffer below the electromagnetic iron remover. When it is detected that the magnetic substances mixed in the material exceed the standard, the material can be sent to the semi-finished product screen again for secondary demagnetization, which is beneficial to reduce the content of magnetic substances in the final product and improve the performance of the graphite negative electrode material.

[0047] The contents of the embodiments of the present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0048] Figure 1A simplified structural diagram of an artificial graphite negative electrode material production system provided in one embodiment of the present application; Figure 2 A simplified structural diagram of a coke crushing and shaping device provided in one embodiment of the present application; Figure 3 A simplified structural diagram of an asphalt crushing device provided in one embodiment of the present application; Figure 4 A simplified structural diagram of a pre-granulation coating device provided in one embodiment of the present application; Figure 5 A simplified structural diagram of a granulation device provided in one embodiment of the present application; Figure 6 A simplified structural diagram of a depolymerization device provided in one embodiment of the present application; Figure 7 A simplified structural diagram of a pre-carbonization coating device provided in one embodiment of the present application; Figure 8 A simplified structural diagram of a finished product mixing device provided in one embodiment of the present application; Figure 9 This is a simplified structural diagram of the finished product screening and demagnetization equipment provided in one embodiment of the application.

[0049] Please refer to Figures 1-9 This embodiment provides an artificial graphite negative electrode material production system, comprising a green coke crushing and shaping device 100, an asphalt crushing device 200, a pre-granulation coating device 300, a granulation device 400, a depolymerization device 500, a pre-carbonization coating device 600, a finished product mixing device 700, and a finished product screening and demagnetization device 800. Each device in this embodiment, as well as each device within the device, can be connected via negative pressure piping, thereby enabling material transfer between and within the devices.

[0050] Specifically, the green coke crushing and shaping equipment 100 is equipped with a green coke feeding station 110, a vibrating feeder 120, a coke crusher 130, a green coke drying equipment 140, a green coke buffer 150, a mechanical mill 160, a coke shaping machine 170, and a green coke ton packing machine 180. The green coke feeding station 110 is connected to the vibrating feeder 120. During operation, the green coke feeding station 110 can be moved by an electric hoist to feed the green coke raw material into the vibrating feeder 120. The vibrating feeder 120 can also be equipped with a dust removal device to remove dust from the green coke. The vibrating feeder 120 is connected to the coke crusher 130, which coarsely crushes the green coke. The coke crusher 130 is also connected to the green coke drying equipment 140, where the coarsely crushed green coke can be dried. The green coke drying device 140 is connected to the green coke buffer 150, and the dried green coke material can be temporarily stored in the green coke buffer 150. The green coke buffer 150 is connected to the mechanical mill 160, which is used to transport the dried green coke material to the mechanical mill 160 for secondary crushing. The mechanical mill 160 is connected to the shaping machine 170, and the green coke material after secondary crushing can be shaped in the shaping machine 170 to meet the requirements of subsequent processes. The shaping machine 170 is connected to the green coke ton package machine 180 and the pre-granulation coating equipment 300. The shaped green coke material can enter the green coke ton package machine 180 for packaging as needed, or can directly enter the pre-granulation coating equipment 300 for subsequent processing.

[0051] The asphalt crushing equipment 200 includes an asphalt feeding station 210, a first rotary iron remover 220, a jet mill 230, an asphalt buffer bin 240, and an asphalt ton package machine 250. The first rotary iron remover 220 is arranged between the asphalt feeding station 210 and the jet mill 230. The asphalt raw material can be removed from most of the magnetic substances mixed therein by the first rotary iron remover 220, thereby reducing the content of magnetic substances at the source; the jet mill 230 can crush the asphalt raw material after the magnetic substances are removed. The jet mill 230 is connected to the asphalt buffer bin 240, and the crushed asphalt raw material can be temporarily stored in the asphalt buffer bin 240. The asphalt buffer bin 240 is connected to the asphalt ton package machine 250 and the pre-granulation coating equipment 300. The crushed asphalt material can enter the asphalt ton package machine 250 for packaging as needed, or can directly enter the pre-granulation coating equipment 300 for subsequent processing.

[0052] The pre-granulation coating equipment 300 includes a first batching bin 310, a second batching bin 320, a third batching bin 330, a second rotary iron remover 340, a first mixer 350, a pre-granulation coating equipment buffer bin 360, and a pre-granulation coating equipment ton packing machine 370. The first batching bin 310 is connected to the green coke crushing and shaping equipment 100 and is used to receive the shaped green coke material. The second batching bin 320 is connected to the air flow mill 230 and is used to receive the crushed asphalt material. The first batching bin 310 and the second batching bin 320 are both connected to the first mixer 350, so that the green coke material and the asphalt material are mixed in the first mixer 350; the ratio of the green coke material to the asphalt material during mixing can be set according to production needs. The third batching bin 330 is connected to the first mixer 350 through the second rotary iron remover 340. The remaining materials except the raw coke material and the asphalt material can be sent to the first mixer 350 through the third batching bin 330 according to the specific requirements of the formula. The second rotary iron remover 340 can remove the magnetic substances in the materials output by the third batching bin 330, thereby reducing the content of the magnetic substances. The first mixer 350 is connected to the pre-granulation coating equipment buffer bin 360, and the mixed materials can be temporarily stored in the pre-granulation coating equipment buffer bin 360. The pre-granulation coating equipment buffer bin 360 is connected to the pre-granulation coating equipment ton package machine 370 and the granulation equipment 400. The mixed materials can enter the pre-granulation coating equipment ton package machine 370 for packaging as needed, or can directly enter the granulation equipment 400 for subsequent processing.

[0053] The granulation equipment 400 includes a granulation feeder 410, a hot reactor 420, a cooling reactor 430, a pipe crusher 440, a granulation equipment buffer 450, and a granulation equipment tonnage machine 460. The granulation feeder 410 is connected to the pre-granulation coating equipment buffer 360. The granulation feeder 410 is also connected to the hot reactor 420, thereby feeding the mixed material into the hot reactor 420. The hot reactor 420 is connected to the cooling reactor 430, and the heated material is transported to the cooling reactor 430 for cooling. Specifically, a jacketed cooling device can be installed outside the connecting pipeline between the hot reactor 420 and the cooling reactor 430 to reduce the temperature of the material entering the cooling reactor 430. After passing through the pipe crusher 440, the cooling reactor 430 is connected to the granulation equipment buffer 450. The cooled material is crushed by the pipe crusher 440 and then enters the granulation equipment buffer 450 for temporary storage. The granulation equipment buffer bin 450 is connected to the granulation equipment ton package machine 460 and the deagglomeration equipment 500. The granulated material can enter the granulation equipment ton package machine 460 for packaging as needed, or can directly enter the deagglomeration equipment 500 for subsequent processing.

[0054] The deagglomeration equipment 500 includes a deagglomeration feeder 510, a deagglomerator 520, a fusion machine 530, a deagglomeration equipment buffer 540, and a deagglomeration equipment ton packing machine 550. The deagglomeration feeder 510 is connected to the granulation equipment buffer 450 and is also connected to the deagglomerator 520, allowing the granulated material to be fed into the deagglomerator 520 for deagglomeration. The deagglomerator 520 is connected to the fusion machine 530, where the deagglomerated material is fed into the fusion machine 530 for fusion. The fusion machine 530 is connected to the deagglomeration equipment buffer 540, where the fused material can be temporarily stored. The deagglomeration equipment buffer 540 is connected to the deagglomeration equipment ton packing machine 550 and the pre-carbonization coating machine 600. The fused material can be fed into the deagglomeration equipment ton packing machine 550 for packaging as needed, or directly into the pre-carbonization coating machine 600 for subsequent processing.

[0055] The pre-carbonization coating equipment 600 includes two distribution material metering bins 610, a fourth distribution material bin 620, a third rotary iron remover 630, a second mixer 640, a pre-carbonization coating equipment buffer bin 650, and a pre-carbonization coating equipment ton packing machine 660. Both distribution material metering bins 610 are connected to the depolymerization equipment buffer bin 540. The two distribution material metering bins 610 are also connected to the second mixer 640, so that the fused materials can be fed into the second mixer 640. The fourth distribution material bin 620 is connected to the second mixer 640 via the third rotary iron remover 630. According to the specific requirements of the recipe, the remaining materials other than the fused materials can be fed into the second mixer 640 through the fourth distribution material bin 620 to be mixed with the fused materials. The third rotary iron remover 630 can remove magnetic materials from the materials output from the fourth distribution material bin 620, thereby reducing the content of magnetic materials. The second mixer 640 is connected to the pre-carbonization coating equipment buffer 650, and the coated and mixed materials can be temporarily stored in the pre-carbonization coating equipment buffer 650. The pre-carbonization coating equipment buffer 650 is connected to the pre-carbonization coating equipment ton package machine 660 and the finished product mixing equipment 700. The coated and mixed materials can enter the pre-carbonization coating equipment ton package machine 660 for packaging as needed, or can directly enter the finished product mixing equipment 700 for subsequent processing.

[0056] The finished product mixing equipment 700 includes multiple finished product mixing equipment loading machines 710, a triple-eccentric mixer 720, a finished product mixing equipment buffer 730, and a finished product mixing equipment ton packing machine 740. The multiple finished product mixing equipment loading machines 710 are all connected to the pre-carbonization coating equipment buffer 650. The multiple finished product mixing equipment loading machines 710 are also connected to the triple-eccentric mixer 720, allowing the coated and mixed materials to be fed into the triple-eccentric mixer 720 for eccentric mixing. The triple-eccentric mixer 720 is connected to the finished product mixing equipment buffer 730, where the eccentrically mixed materials can be temporarily stored. The finished product mixing equipment buffer 730 is connected to the finished product mixing equipment ton packing machine 740 and the finished product screening and demagnetization equipment 800. The eccentrically mixed materials can be sent to the finished product mixing equipment ton packing machine 740 for packaging as needed, or directly sent to the finished product screening and demagnetization equipment 800 for subsequent processing.

[0057] The finished product screening and demagnetization equipment 800 includes a finished product loader 810, a screening buffer bin 820, a semi-finished product screen 830, multiple electromagnetic iron removers 840, a post-iron removal buffer bin 850, a finished product screen 860 and a finished product ton package machine 870. The finished product loader 810 is connected to the finished product mixing equipment buffer bin 730, and the finished product loader 810 is also connected to the screening buffer bin 820, so that the eccentrically mixed material is sent into the screening buffer bin 820 for temporary storage. The screening buffer bin 820 is connected to the semi-finished product screen 830, and the semi-finished product screen can perform the first coarse screening of the material. Multiple electromagnetic iron removers 840 are arranged in series between the semi-finished product screen 830 and the post-iron removal buffer bin 850. The coarsely screened material then passes through multiple electromagnetic iron removers 840 in sequence, thereby removing the magnetic substance in the material to improve the performance of the material. Finished product screen 860 is connected to post-iron removal buffer 850. The demagnetized material can be screened again on this screen to obtain the required graphite anode material. Finished product screen 860 is also connected to finished product packager 870, where the final graphite anode material can be packaged.

[0058] Furthermore, in this embodiment, the post-iron removal buffer bin 850 is further provided with a magnetic material detection device 880, and the post-iron removal buffer bin 850 is also connected to the semi-finished product screen 830. The magnetic material detection device 880 can perform magnetic material detection on the material in the post-iron removal buffer bin 850. If the magnetic material content is detected to be excessive, the material in the post-iron removal buffer bin 850 can be sent back to the semi-finished product screen 830, and the material can be demagnetized again by passing through multiple electromagnetic iron removers 840 until the process requirements are met.

[0059] In this embodiment, a first rotary iron remover 220 is provided in the asphalt crushing equipment 200 to remove ferromagnetic substances in the asphalt raw material, thereby reducing the content of ferromagnetic substances at the source. A second rotary iron remover 340 is provided in the pre-granulation coating equipment 300, and a third rotary iron remover 630 is provided in the pre-carbonization coating equipment 600, so as to demagnetize the materials added during mixing and reduce the content of magnetic substances in the materials entering the equipment. In addition, a plurality of electromagnetic iron removers 840 are provided in the finished product screening and demagnetization equipment 800 to remove ferromagnetic substances mixed in the finished product, and a magnetic substance detection device 880 is provided in the post-iron removal buffer 850 below the electromagnetic iron remover 840. When it is detected that the magnetic substances mixed in the material exceed the standard, the material can be sent to the semi-finished product screen 830 again for secondary demagnetization, which is beneficial to reduce the content of magnetic substances in the final product and improve the performance of the graphite negative electrode material.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0062] It should be noted that in the description of this application, the terms "first" and "second" are used solely to facilitate the description of different components and should not be understood to indicate or imply a sequential relationship, relative importance, or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0063] The various embodiments or implementation methods in this application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A system for producing artificial graphite negative electrode materials, characterized in that: Including green coke crushing and shaping equipment, asphalt crushing equipment, pre-granulation coating equipment, granulation equipment, depolymerization equipment, pre-carbonization coating equipment, finished product mixing equipment and finished product screening and demagnetization equipment; The green coke crushing and shaping equipment is provided with a green coke feeding station, and the green coke crushing and shaping equipment is connected to the pre-granulation coating equipment; The asphalt crushing equipment includes an asphalt feeding station, a first rotary iron remover and an air flow mill, wherein the first rotary iron remover is arranged between the asphalt feeding station and the air flow mill, and the air flow mill is connected to the pre-granulation coating equipment; The pre-granulation coating equipment includes a first batching bin, a second batching bin, a third batching bin, a second rotary iron remover and a first mixer, wherein the first batching bin is connected to the green coke crushing and shaping equipment, the second batching bin is connected to the air flow crusher, the first batching bin and the second batching bin are both connected to the first mixer, the third batching bin is connected to the first mixer via the second rotary iron remover, and the first mixer is connected to the granulation equipment; The granulation equipment is connected to the deagglomeration equipment; The depolymerization device is connected to the pre-carbonization coating device; The pre-carbonization coating equipment includes a distribution material metering bin, a fourth distribution material bin, a third rotary iron remover, and a second mixer. The distribution material metering bin is connected to the depolymerization equipment, and the distribution material metering bin is also connected to the second mixer. The fourth distribution material bin is connected to the second mixer through the third rotary iron remover, and the second mixer is connected to the finished product mixing equipment. The finished product mixing equipment is connected to the finished product screening and demagnetization equipment; The finished product screening and demagnetization equipment includes a semi-finished product screen, multiple electromagnetic iron removers, and a post-iron removal cache bin. The semi-finished product screen is connected to the finished product mixing equipment, and the multiple electromagnetic iron removers are arranged between the semi-finished product screen and the post-iron removal cache bin; the post-iron removal cache bin is also provided with a magnetic material detection device, and the post-iron removal cache bin is also connected to the semi-finished product screen.

2. The artificial graphite negative electrode material production system according to claim 1, characterized in that: The green coke crushing and shaping equipment also includes a vibrating feeder, a coke drying equipment, a green coke buffer, a mechanical mill, a shaping machine and a green coke ton bag machine; the green coke feeding station is connected to the vibrating feeder, the vibrating feeder is connected to the coke coke crusher, the coke coke drying equipment is connected to the green coke buffer, the green coke buffer is connected to the mechanical mill, the mechanical mill is connected to the shaping machine, the shaping machine is connected to the green coke ton bag machine and the pre-granulation coating equipment.

3. The artificial graphite negative electrode material production system according to claim 2, characterized in that: The asphalt crushing equipment also includes an asphalt buffer bin and an asphalt ton package machine. The air flow crusher is connected to the asphalt buffer bin, and the asphalt buffer bin is connected to the asphalt ton package machine and the pre-granulation coating equipment.

4. The artificial graphite negative electrode material production system according to claim 3, characterized in that: The pre-granulation coating equipment also includes a pre-granulation coating equipment buffer warehouse and a pre-granulation coating equipment ton package machine, the first mixer is connected to the pre-granulation coating equipment buffer warehouse, the pre-granulation coating equipment buffer warehouse is connected to the pre-granulation coating equipment ton package machine and the granulation equipment.

5. The artificial graphite negative electrode material production system according to claim 4, characterized in that: The granulation equipment includes a granulation loader, a thermal reactor, a cooling reactor, a pipe crusher, a granulation equipment buffer bin and a granulation equipment ton bag machine. The granulation loader is connected to the buffer bin of the pre-granulation coating equipment, the granulation loader is also connected to the thermal reactor, the thermal reactor is connected to the cooling reactor, the cooling reactor is connected to the granulation equipment buffer bin after passing through the pipe crusher, and the granulation equipment buffer bin is connected to the granulation equipment ton bag machine and the depolymerization equipment.

6. The artificial graphite negative electrode material production system according to claim 5, characterized in that: The deagglomeration equipment includes a deagglomeration loader, a deagglomeration machine, a fusion machine, a deagglomeration equipment buffer warehouse and a deagglomeration equipment ton bag machine. The deagglomeration loader is connected to the granulation equipment buffer warehouse, the deagglomeration loader is also connected to the deagglomeration machine, the deagglomeration machine is connected to the fusion machine, the fusion machine is connected to the deagglomeration equipment buffer warehouse, the deagglomeration equipment buffer warehouse is connected to the deagglomeration equipment ton bag machine and the pre-carbonization coating equipment.

7. The artificial graphite negative electrode material production system according to claim 6, characterized in that: The pre-carbonization coating equipment includes two distribution material metering bins, a pre-carbonization coating equipment buffer bin and a pre-carbonization coating equipment ton package machine. The two distribution material metering bins are connected to the depolymerization equipment buffer bin and the second mixer. The second mixer is connected to the pre-carbonization coating equipment buffer bin. The pre-carbonization coating equipment buffer bin is connected to the pre-carbonization coating equipment ton package machine and the finished product mixing equipment.

8. The artificial graphite negative electrode material production system according to claim 7, characterized in that: The finished product mixing equipment includes multiple finished product mixing equipment loading machines, a three-eccentric mixer, a finished product mixing equipment buffer warehouse and a finished product mixing equipment ton package machine. Multiple finished product mixing equipment loading machines are connected to the pre-carbonization coating equipment buffer warehouse, and multiple finished product mixing equipment loading machines are also connected to the three-eccentric mixer. The three-eccentric mixer is connected to the finished product mixing equipment buffer warehouse, and the finished product mixing equipment buffer warehouse is connected to the finished product mixing equipment ton package machine and the finished product screening and demagnetization equipment.

9. The artificial graphite negative electrode material production system according to claim 8, characterized in that: The finished product screening and demagnetization equipment also includes a finished product loader, a screening buffer bin, a finished product screen and a finished product ton package machine. The finished product loader is connected to the finished product mixing equipment buffer bin, and the finished product loader is also connected to the screening buffer bin. The screening buffer bin is connected to the semi-finished product screen, and the finished product screen is connected to the post-iron removal buffer bin. The finished product screen is also connected to the finished product ton package machine.

10. The artificial graphite negative electrode material production system according to claim 9, characterized in that: A plurality of the electromagnetic iron removers are connected in series.

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