Method and device for preparing whole-process spherical graphite

Abstract

The invention discloses a full-process spherical graphite preparation method and device, and belongs to the field of spherical graphite preparation, and the method comprises the following steps: S1, graphite raw materials pass through a front-end weighing feeding bin, and the raw materials are subjected to graded crushing through a crushing disc at the middle lower part of a crushing and shaping all-in-one machine; s2, the materials collected by the static separator enter a feeding bin at the front end of winnowing and grading equipment, accurate particle size grading is conducted, and three kinds of materials are formed and are the ultra-coarse material C, the finished product material D and the fine powder material F respectively; s3, returning the material C to a front-end weighing and feeding bin through a first pipeline, and performing cyclic crushing again; the finished product material D enters finished product polymerization equipment to improve the tap density; and the fine powder material F and the fine powder tailings B are fed into micro powder polymerization equipment for micro powder polymerization. According to the invention, the product yield is greatly improved, the overall production income is improved, the equipment energy consumption is reduced, the production line finished product yield is improved, the equipment production efficiency is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of preparation of spherical graphite, in particular to a full-process preparation method and device for spherical graphite. Background Art

[0002] With the rapid development of the global new materials industry, graphite, as an important non-metallic material, is finding increasingly widespread application. Graphite is a key negative electrode material for lithium batteries. Natural flake graphite needs to be converted into spherical graphite through spheroidization to improve its tap density, fluidity, and electrochemical performance to meet battery material requirements. Graphite spheroidization technology, particularly in the fields of new energy, electronics, and chemicals, has become a research hotspot due to its unique physical and chemical properties. Spherical graphite negative electrode materials hold a significant position in the negative electrode material market. Traditionally, spherical graphite production involves a combined grinding process using dozens to twenty vortex cyclone mills to gradually crush and spheroidize the graphite.

[0003] At present, the technical bottlenecks encountered in the preparation process of spherical graphite mainly include the following aspects:

[0004] Poor control of spheroidization: Controlling the spheroidization effect is a key technical issue during the graphite spheroidization process. Due to the diversity and complexity of graphite raw materials, the spheroidization process is difficult to accurately control, resulting in unstable performance indicators such as sphericity, particle size distribution, and tap density of spherical graphite.

[0005] Energy consumption and environmental issues are prominent: The graphite spheroidization process typically consumes a large amount of energy and may cause certain environmental pollution. How to reduce energy consumption and pollution while ensuring the spheroidization effect is a major technical bottleneck that graphite spheroidization equipment needs to solve.

[0006] Poor adaptability of the process system to raw materials: Graphite raw materials of different sources and qualities have different requirements for spheroidization equipment. How to improve the raw material adaptability of graphite spheroidization equipment so that it can process graphite raw materials of various qualities is a major technical bottleneck. Summary of the Invention

[0007] In response to some existing problems, the purpose of the present invention is to provide a full-process preparation method and device for spherical graphite to solve the problems of the graphite spheroidization production line having many equipments, low efficiency, and high energy consumption.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A full-process method for preparing spherical graphite, the steps of which are as follows:

[0010] Step S1: Graphite raw materials are quantitatively fed into the crushing and shaping machine through the front-end weighing feeding bin. The raw materials are graded and crushed by the crushing disks in the middle and lower part of the crushing and shaping machine. The raw materials are continuously crushed and spheroidized during circulation in the cavity. Among them, material X, which has passed the classification and powder selection of the upper grading wheel of the crushing and shaping machine, enters the static separator, where material A is collected, and unqualified material Y is retained in the crushing and shaping machine cavity for circulation. In addition, the fine powder tail material B is collected by the dust collector at the end of the system.

[0011] Step S2: Material A collected by the static separator enters the front feed bin of the air separation and classification equipment through a conveying pipeline. Material A is accurately classified by the air separation and classification equipment to form three types of materials, namely, super coarse material C, finished material D, and fine powder material F.

[0012] In step S3, material C is returned to the front-end weighing and feeding bin through the first pipe, and re-enters the crushing and shaping integrated machine for cyclic crushing; the finished material D enters the finished product polymerization equipment through the second pipe to increase the tap density and form product Z; the fine powder material F and the fine powder tail material B are respectively sent to the micro-powder polymerization equipment through the third pipe and the fourth pipe, and micro-powder polymerization is carried out according to a quantitative ratio to re-polymerize into product Z; finally, it is transported to the finished product bin through the conveying device.

[0013] The device used in the full-process preparation method of spherical graphite includes a weighing feeding bin, a crushing and shaping machine, a static separator, a dust collector, a feeding bin, an air separation and classification device, a finished product polymerization device, a micro powder polymerization device and a conveying device. The bottom outlet of the weighing feeding bin is connected to the inlet of the crushing and shaping machine.

[0014] The outlet end of the crushing and shaping machine is connected to the side wall of the static separator, the top end of the static separator is connected to the dust collector, and the bottom end of the static separator is connected to the inlet end of the feeding bin;

[0015] The outlet end of the feeding bin and the inlet end of the fifth channel, the fifth channel is arranged in the air separation and classification equipment;

[0016] The outlet of the air separation and classification equipment is connected to the weighing feeding bin, the finished product polymerization equipment, and the micro powder polymerization equipment respectively;

[0017] The outlet end of the dust collector is connected to the micro powder aggregation device through a fourth channel;

[0018] The outlet end of the micro powder polymerization equipment is connected to the conveying device.

[0019] As a further solution of the present invention: a crushing disc and a grading wheel are provided inside the said crushing and shaping machine.

[0020] As a further solution of the present invention: the crushing disk is arranged at the inner bottom end of the crushing and shaping machine, and the crushing disk is connected to a crushing motor.

[0021] As a further solution of the present invention: the classifying wheel is arranged at the inner top of the crushing and shaping machine, and the classifying wheel is connected to another crushing motor.

[0022] As a further solution of the present invention: the air separation and grading equipment is provided with a first channel, a second channel and a third channel; a first channel blade is provided in the first channel, a third channel blade is provided in the second channel, and a third channel blade is provided in the third channel.

[0023] As a further solution of the present invention: one end of the first channel is connected to the outlet end of the fifth channel, and the other end of the first channel is connected to the side wall of the weighing feeding bin.

[0024] As a further solution of the present invention: one end of the second channel is also connected to the outlet end of the fifth channel, and the other end of the second channel is connected to the inlet end of the finished product polymerization device.

[0025] As a further solution of the present invention: one end of the third channel is also connected to the outlet end of the fifth channel, and the other end of the third channel is connected to the micro powder aggregation device.

[0026] As a further solution of the present invention: the finished product polymerization equipment is provided with a finished product polymerization rotor, which is connected to the finished product polymerization motor; the micropowder polymerization equipment is provided with a micropowder polymerization rotor, which is connected to the micropowder polymerization motor.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] Through the above process flow, the present invention generates no waste in the graphite spheroidization process and forms a closed-loop circulation system, thereby greatly improving the yield of the product and increasing the overall production benefits, avoiding graphite overflow and thus polluting the production environment, protecting the health of employees, eliminating production risks, shortening the process flow, reducing equipment energy consumption, improving the yield of finished products of the production line, greatly improving equipment production efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a process diagram of the entire production process of spherical graphite processing of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall layout of the equipment related to the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the integrated crushing and spheroidizing equipment of the present invention;

[0032] Figure 4This is a schematic structural diagram of the air separation and classification equipment of the present invention;

[0033] Figure 5 This is a schematic structural diagram of the finished product polymerization equipment of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the tailings polymerization equipment of the present invention.

[0035] In the figure: 1. Weighing and feeding silo; 2. Crushing and shaping machine; 21. Crushing disc; 22. Classifying wheel; 211. Crushing motor; 3. Static separator; 4. Dust collector; 5. Feeding silo; 6. Air separation and classification equipment; 61. First channel; 62. Second channel; 63. Third channel; 64. Fourth channel; 65. Fifth channel; 661. First channel blade; 662. Second channel blade; 663. Third channel blade; 7. Finished product polymerization equipment; 71. Finished product polymerization rotor; 711. Finished product polymerization motor; 8. Micro powder polymerization equipment; 81. Micro powder polymerization rotor; 811. Micro powder polymerization motor; 9. Conveying device. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "provided with," "connected," and "connected" should be understood in a broad sense; for example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections via an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0038] The technical solution adopted by the present invention is: a full-process preparation method and device for spherical graphite, which includes a crushing and shaping all-in-one machine, a static separator, a tail dust collector and other equipment, and is combined with air separation and grading equipment and tail material polymerization equipment to further improve the production line efficiency.

[0039] The technical problem to be solved by the present invention is to realize the preparation process of spherical graphite in the whole process and its control method, so as to solve the problems of the large number of equipment, low efficiency and high energy consumption in the graphite spheroidization production line. Through the intelligent parameter adjustment system, it can adapt to the properties of different raw materials, greatly improve the production efficiency of the equipment and reduce the production cost.

[0040] See also Figure 1 A full-process method for preparing spherical graphite comprises the following steps:

[0041] Step S1: Graphite raw materials are quantitatively fed into the crushing and shaping machine 2 through the front-end weighing feeding bin 1. The raw materials are graded and crushed by the crushing disk 21 in the middle and lower part of the crushing and shaping machine 2. The raw materials are continuously crushed and spheroidized during the circulation process in the cavity. Among them, the material X after being graded and powdered by the grading wheel 22 on the upper part of the crushing and shaping machine 2 enters the static separator 3, where the material A is collected, and the unqualified material Y is still retained in the crushing and shaping machine 2 cavity for circulation. In addition, the fine powder tail B is collected by the dust collector 4 at the end of the system. At this point, the production process completes one crushing and one powder selection.

[0042] In step S2, the material A collected by the static separator 3 enters the feeding bin 5 at the front end of the air separation and classification device 6 through the conveying pipeline. The material A is accurately classified by the particle size of the air separation and classification device 6 to form three types of materials, namely, super coarse material C, finished material D, and fine powder material F. At this point, the production process completes the secondary powder selection.

[0043] In step S3, material C is returned to the front-end weighing and feeding bin 1 through the first pipe 61, and re-enters the crushing and shaping integrated machine 2 for cyclic crushing; the finished material D enters the finished product polymerization device 7 through the second pipe 62 to increase the tap density and form product Z; the fine powder material F and the fine powder tail material B are respectively sent to the micro-powder polymerization device 8 through the third pipe 63 and the fourth pipe 64, and the micro-powder is aggregated according to a quantitative ratio and re-aggregated into product Z; finally, it is transported to the finished product bin through the conveying device 9; at this point, the entire production process completes product production and forms a full process cycle.

[0044] A device used in a full-process preparation method of spherical graphite includes a weighing feeding bin 1, a crushing and shaping machine 2, a static separator 3, a dust collector 4, a feeding bin 5, an air separation and classification device 6, a finished product polymerization device 7, a micro powder polymerization device 8, and a conveying device 9. The bottom outlet of the weighing feeding bin 1 is connected to the inlet of the crushing and shaping machine 2. The crushing and shaping machine 2 is provided with a crushing disk 21 and a classifying wheel 22. The crushing disk 21 is arranged at the bottom end of the crushing and shaping machine 2 and is connected to a crushing motor 211. The classifying wheel 22 is arranged at the top end of the crushing and shaping machine 2 and is connected to another crushing motor 211.

[0045] The outlet end of the crushing and shaping machine 2 is connected to the side wall of the static separator 3, the top end of the static separator 3 is connected to the dust collector 4, and the bottom end of the static separator 3 is connected to the inlet end of the feeding bin 5;

[0046] The outlet end of the feeding bin 5 and the inlet end of the fifth channel 65, the fifth channel 65 is arranged in the air separation and classification device 6;

[0047] The outlet end of the dust collector 4 is connected to the micro powder aggregation device 8 through the fourth channel 64;

[0048] The outlet of the micro powder polymerization device 8 is connected to the conveying device 9;

[0049] The air separation and classification device 6 is provided with a first channel 61, a second channel 62, and a third channel 63; a first channel blade 661 is provided in the first channel 61, a third channel blade 662 is provided in the second channel 62, and a third channel blade 663 is provided in the third channel 63;

[0050] One end of the first channel 61 is connected to the outlet end of the fifth channel 65, and the other end of the first channel 61 is connected to the side wall of the weighing feeding bin 1;

[0051] One end of the second channel 62 is also connected to the outlet end of the fifth channel 65, and the other end of the second channel 62 is connected to the inlet end of the finished product polymerization device 7;

[0052] One end of the third channel 63 is also connected to the outlet end of the fifth channel 65, and the other end of the third channel 63 is connected to the micro powder aggregation device 8;

[0053] The finished product polymerization device 7 is provided with a finished product polymerization rotor 71, and the finished product polymerization rotor 71 is connected to the finished product polymerization motor 711;

[0054] A micro powder aggregation rotor 81 is provided inside the micro powder aggregation device 8, and the micro powder aggregation rotor 81 is connected to a micro powder aggregation motor 811;

[0055] Specifically, the weighing feeding bin 1 ensures the feeding balance of the entire system through weighing sensing and quantitative feeding, and controls the output of the entire system by adjusting the feeding parameters.

[0056] Specifically, the crushing disc 21 and the upper grading wheel 22 in the crushing and shaping machine 2 are controlled by the motor 211 and the motor 221 respectively to control the rotation speed, and adjust the internal circulation volume of the equipment so that the equipment can meet the characteristics of different raw materials.

[0057] Specifically, the first channel blade 661, the second channel blade 662, and the third channel blade 663 are used inside the air separation and classification device 6 to control the particle size distribution of the super coarse material C, the finished material D, and the fine powder material F respectively to obtain different finished product requirements.

[0058] Specifically, the finished product polymerization device 7 adjusts the rotation speed of the internal finished product polymerization rotor 71 through the finished product polymerization motor 711 to control the compaction requirements of different finished products Z.

[0059] Specifically, the micro-powder polymerization device 8 adjusts the rotation speed of the internal micro-powder polymerization rotor 81 through the micro-powder polymerization motor 811 and adjusts the addition ratio of the polymerization agent to control the particle size and compaction requirements of different finished products Z.

[0060] Through the above process flow, the present invention generates no waste during the graphite spheroidization process. The entire process is parameterized and controlled, forming a closed-loop circulation system, significantly improving product yield and overall production revenue. Furthermore, the system utilizes a fully negative pressure production mode to prevent graphite overflow and contamination of the production environment, protecting employee health and eliminating production risks.

[0061] The present invention relates to technical fields such as equipment manufacturing and spherical graphite preparation, and in particular to a method and device for preparing spherical graphite in the whole process. The main purpose is to improve the graphite spheroidization effect, shorten the process flow, reduce equipment energy consumption, increase the yield of finished products on the production line, and adapt to different material working conditions through full-process parameter control. The technical problem to be solved by the present invention is to realize the preparation process of spherical graphite in the whole process and its control method, solve the problems of the large number of equipment, low efficiency and high energy consumption of the graphite spheroidization production line, and adapt to the properties of different raw materials through the intelligent parameter adjustment system, greatly improve the production efficiency of the equipment and reduce the production cost.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The embodiments should, therefore, be considered in all respects as illustrative and non-restrictive. The scope of the invention is defined by the appended claims rather than the foregoing description, and all changes coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0063] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A full-process method for preparing spherical graphite, characterized in that: The steps are as follows: Step S1, graphite raw materials are quantitatively fed into the crushing and shaping machine (2) through the front-end weighing feeding bin (1), and the raw materials are graded and crushed by the crushing disk (21) in the middle and lower part of the crushing and shaping machine (2). The raw materials are continuously crushed and spheroidized during the circulation process in the cavity; wherein, the material X after being graded and powdered by the upper grading wheel (22) of the crushing and shaping machine (2) enters the static separator (3), and the material A therein is collected, and the unqualified material Y is still retained in the crushing and shaping machine (2) cavity for circulation; in addition, the fine powder tail material B is collected by the dust collector (4) at the end of the system; In step S2, the material A collected by the static separator (3) enters the front feed bin (5) of the air separation and classification device (6) through a conveying pipeline. The material A is accurately classified by the particle size of the air separation and classification device (6) to form three types of materials, namely, super coarse material C, finished material D, and fine powder material F; In step S3, the material C is returned to the front weighing and feeding bin (1) through the first pipe (61), and re-enters the crushing and shaping integrated machine (2) for cyclic crushing; the finished material D enters the finished product polymerization device (7) through the second pipe (62) to increase the tap density and form product Z; the fine powder material F and the fine powder tail material B are respectively sent to the micro powder polymerization device (8) through the third pipe (63) and the fourth pipe (64), and the micro powder is polymerized according to a quantitative ratio and re-polymerized into product Z; finally, it is transported to the finished product bin through the conveying device (9).

2. The device used in the full-process spherical graphite preparation method according to claim 1, characterized in that: The invention comprises a weighing feeding bin (1), a crushing and shaping integrated machine (2), a static separator (3), a dust collector (4), a feeding bin (5), an air separation and classification device (6), a finished product polymerization device (7), a micro powder polymerization device (8) and a conveying device (9), wherein the bottom outlet of the weighing feeding bin (1) is connected to the inlet of the crushing and shaping integrated machine (2). The outlet end of the crushing and shaping machine (2) is connected to the side wall of the static separator (3), the top end of the static separator (3) is connected to the dust collector (4), and the bottom end of the static separator (3) is connected to the inlet end of the feeding bin (5); The outlet end of the feeding bin (5) and the inlet end of the fifth channel (65), the fifth channel (65) is arranged in the air separation and classification device (6); The outlet end of the air separation and classification device (6) is connected to the weighing feeding bin (1), the finished product polymerization device (7), and the micro powder polymerization device (8) respectively; The outlet end of the dust collector (4) is connected to the micro powder aggregation device (8) via a fourth channel (64); The outlet end of the micro powder polymerization device (8) is connected to the conveying device (9).

3. The device used in the full-process spherical graphite preparation method according to claim 2, characterized in that: The crushing and shaping integrated machine (2) is provided with a crushing disc (21) and a grading wheel (22) inside.

4. The device used in the full-process spherical graphite preparation method according to claim 3, characterized in that: The crushing disk (21) is arranged at the inner bottom end of the crushing and shaping machine (2), and the crushing disk (21) is connected to a crushing motor (211).

5. The device used in the full-process spherical graphite preparation method according to claim 4, characterized in that: The classifying wheel (22) is arranged at the top end of the crushing and shaping machine (2), and the classifying wheel (22) is connected to another crushing motor (211).

6. The device used in the full-process method for preparing spherical graphite according to claim 5, characterized in that: The air separation and classification device (6) is provided with a first channel (61), a second channel (62), and a third channel (63); a first channel blade (661) is provided in the first channel (61), a third channel blade (662) is provided in the second channel (62), and a third channel blade (663) is provided in the third channel (63).

7. The device used in the full-process method for preparing spherical graphite according to claim 6, characterized in that: One end of the first channel (61) is connected to the outlet end of the fifth channel (65), and the other end of the first channel (61) is connected to the side wall of the weighing feeding bin (1).

8. The device used in the full-process method for preparing spherical graphite according to claim 7, characterized in that: One end of the second channel (62) is also connected to the outlet end of the fifth channel (65), and the other end of the second channel (62) is connected to the inlet end of the finished product polymerization device (7).

9. The device used in the full-process method for preparing spherical graphite according to claim 8, characterized in that: One end of the third channel (63) is also connected to the outlet end of the fifth channel (65), and the other end of the third channel (63) is connected to the micro powder aggregation device (8).

10. The device used in the full-process method for preparing spherical graphite according to claim 9, characterized in that: The finished product polymerization device (7) is provided with a finished product polymerization rotor (71), which is connected to a finished product polymerization motor (711); the micropowder polymerization device (8) is provided with a micropowder polymerization rotor (81), which is connected to a micropowder polymerization motor (811).

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