CN112479200A - Method for producing cathode material by using waste heat with co-firing - Google Patents
Method for producing cathode material by using waste heat with co-firing Download PDFInfo
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- CN112479200A CN112479200A CN202011551702.0A CN202011551702A CN112479200A CN 112479200 A CN112479200 A CN 112479200A CN 202011551702 A CN202011551702 A CN 202011551702A CN 112479200 A CN112479200 A CN 112479200A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 18
- 239000010406 cathode material Substances 0.000 title claims abstract description 17
- 238000010344 co-firing Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000012216 screening Methods 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 24
- 239000010439 graphite Substances 0.000 claims abstract description 24
- 239000007773 negative electrode material Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000010426 asphalt Substances 0.000 claims abstract description 5
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000005087 graphitization Methods 0.000 claims description 8
- 239000011294 coal tar pitch Substances 0.000 claims description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 5
- 238000003763 carbonization Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 229910001416 lithium ion Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000007849 furan resin Substances 0.000 claims description 3
- 238000000462 isostatic pressing Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 229910021383 artificial graphite Inorganic materials 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/205—Preparation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a method for producing a cathode material by using waste heat with co-firing, which comprises the following steps: firstly, producing and mixing a negative electrode material; secondly, profiling materials; step three, carbonizing the material; step four, graphitizing the material; step five, material molding; step six, detecting materials; in the first step, firstly, grinding and grading finished graphite, granulating the graphite, screening the granulated graphite by using a screening machine to obtain a negative electrode material with the average particle size of 5-40 mu m, adding the screened negative electrode material and asphalt into a powder mixer according to the mass ratio of 4: 1-12: 1, and fully mixing for 90-150min under a vacuum condition; the invention presses the powdery raw material into a column shape, eliminates a crucible container, is convenient to carry and place, fully utilizes a high-temperature heat radiation source for heating, saves a large amount of energy, has the characteristics of simplicity, convenience, quickness and easy operation, and can be prepared in a large scale.
Description
Technical Field
The invention relates to the technical field of battery materials, in particular to a method for producing a negative electrode material by using waste heat and co-firing.
Background
The cathode material is the key to realizing miniaturization and high capacity of the lithium ion battery; at present, most of the negative electrode materials are carbon materials, and the graphite negative electrode materials have the advantages of high specific capacity, good cycle performance, high intercalation and deintercalation lithium platform voltage, low cost and the like, so that the graphite negative electrode materials become the negative electrode materials of the power lithium ion battery with the most commercial value.
The graphite negative electrode materials are divided into natural graphite and artificial graphite, the artificial graphite is mostly used at present, but the artificial graphite has poor compatibility with electrolyte, and irreversible decomposition of an organic solvent on a carbon negative electrode can generate negative effects on electrode behaviors, so that a graphite layer expands and contracts to cause fracture and peeling of the graphite layer, thereby reducing the cycle efficiency; in the traditional process, the powder obtained by mixing the asphalt powder and the graphite powder is directly put into a graphite crucible for sample carbonization and then graphitized; the process needs to be filled into a specific container to isolate impurities, but wastes a large amount of volume in the mass production process, the container absorbs a large amount of heat in the carbonization and graphitization processes, and a specific graphitization furnace needs to be designed, so that the one-time investment cost is high, and the energy consumption in the graphitization process is high.
Disclosure of Invention
The invention aims to provide a method for producing a negative electrode material by using waste heat and co-firing so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a method for producing a cathode material by using waste heat with co-firing comprises the following steps: firstly, producing and mixing a negative electrode material; secondly, profiling materials; step three, carbonizing the material; step four, graphitizing the material; step five, material molding; step six, detecting materials;
in the first step, firstly, grinding and grading finished graphite, granulating the graphite, screening the granulated graphite by using a screening machine to obtain a negative electrode material with the average particle size of 5-40 mu m, adding the screened negative electrode material and asphalt into a powder mixer according to the mass ratio of 4: 1-12: 1, and fully mixing for 90-150min under a vacuum condition;
in the second step, taking out the mixed materials, putting the materials into an isostatic press to be pressed into a cylinder with the diameter of 5-20cm, and wrapping a layer of resin A on the surface of the cylinder after isostatic pressing;
wherein in the third step, the cylinder is put into a vacuum atmosphere furnace, the temperature is raised to 550-650 ℃ in an oxygen-free environment, and the temperature is kept for 0.5-5h for carbonization;
in the fourth step, the carbonized sample is placed beside a high-temperature heat radiation source, the sample is subjected to combustion-tracing graphitization by using waste heat, and the combustion-tracing temperature is 2400-3200 ℃;
in the fifth step, impurities on the outer surface of the graphitized sample are cleaned, and the graphite cathode material of the lithium ion battery is obtained through scattering and screening;
in the sixth step, the negative electrode material is detected by a professional detection device, unqualified materials are screened, and the finished material is recorded and stored.
According to the above technical scheme, in the first step, the screening machine comprises a screening tank main body, a motor, a rotating shaft, a groove, a mounting groove, a lifting groove, a spring, a frame, a filter screen, a rotating hole, a lifting rod, an arc-shaped convex block, a fixed shaft, a cam, a feeding pipe and a discharging port, wherein the motor is embedded and installed on the inner wall of the top end of the screening tank main body, the rotating shaft is installed on the inner wall of one side of the screening tank main body, one end of the output shaft of the motor is fixedly connected to the outer wall of the rotating shaft, the groove is formed in the outer wall of one side of the rotating shaft, the frame is installed on the inner wall of one side of the screening tank main body, the rotating hole is formed in the inner wall of one side of the frame corresponding to the groove, the lifting rod is welded and fixed on the inner, and the other end of spring welds on the outer wall of lifter, and the symmetry is inlayed and is connected with the filter screen on one side inner wall of frame, and it has the arc lug to distribute welded fastening on the bottom outer wall of frame, fixedly connected with fixed axle on one side inner wall of screening jar main part, and fixed mounting has the cam on the one end outer wall of fixed axle, and through connection has the inlet pipe on the top inner wall of screening jar main part, has seted up the discharge gate on the bottom inner wall of screening jar main part.
According to the technical scheme, the volume density of the cylindrical sample prepared in the second step is 0.5-1.8g/cm 3.
According to the technical scheme, the resin A adopted in the second step is one or more of phenolic resin, furan resin, epoxy resin, polyester resin, polyvinyl chloride resin and the like.
According to the technical scheme, the thickness of the resin A wrapped on the surface layer of the sample in the second step is 1-3 mm.
According to the technical scheme, in the third step, the temperature is raised to 550-650 ℃ at the temperature raising rate of 5-15 ℃/min, preferably, the temperature ranges from 580-620 ℃ and the heat preservation time is 0.5-1.5 h.
According to the technical scheme, in the fourth step, the heating time at the temperature of the co-firing graphitization is 1.0-2.5 h.
According to the technical scheme, the average particle size of the coal tar pitch in the first step is 5-8 μm, and the softening point of the coal tar pitch is 100-300 ℃.
Compared with the prior art, the invention has the following beneficial effects: the method presses the powdery raw materials into a column shape, eliminates a crucible container, is convenient to carry and place, fully utilizes a high-temperature heat radiation source, saves a large amount of energy, has the characteristics of simplicity, convenience, quickness and easy operation, and can be used for large-scale preparation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic overall perspective view of the present invention;
FIG. 3 is a front view cut-away schematic of the present invention;
FIG. 4 is an enlarged view of the structure of the area A in FIG. 3 according to the present invention;
FIG. 5 is a schematic perspective view of the frame of the present invention;
in the figure: 1. screening the tank main body; 2. a motor; 3. a rotating shaft; 4. a groove; 5. mounting grooves; 6. a lifting groove; 7. a spring; 8. a frame; 9. filtering with a screen; 10. rotating the hole; 11. a lifting rod; 12. an arc-shaped bump; 13. a fixed shaft; 14. a cam; 15. a feed pipe; 16. and (4) a discharge port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-5, the present invention provides a technical solution: a method for producing a cathode material by using waste heat with co-firing comprises the following steps: firstly, producing and mixing a negative electrode material; secondly, profiling materials; step three, carbonizing the material; step four, graphitizing the material; step five, material molding; step six, detecting materials;
wherein in the first step, the finished product graphite is firstly ground and graded, the graphite is granulated, then a screening machine is used for screening the granulated graphite to obtain a negative electrode material with the average particle size of 5-40 mu m, 5 parts of asphalt and 30 parts of artificial graphite are added into a powder mixer and are fully mixed for 90-150min under the vacuum condition, the average particle size of coal tar pitch in the first step is 5-8 mu m, the softening point of the coal tar pitch is 100-300 ℃, in the first step, the screening machine comprises a screening tank main body 1, a motor 2, a rotating shaft 3, a groove 4, an installation groove 5, a lifting groove 6, a spring 7, a frame 8, a filter screen 9, a rotating hole 10, a lifting rod 11, an arc-shaped bump 12, a fixed shaft 13, a cam 14, a feeding pipe 15 and a discharging port 16, the motor 2 is embedded on the inner wall at the top end of the screening tank main body 1, the rotating shaft 3 is installed on one side of the screening tank main, one end of an output shaft of the motor 2 is fixedly connected to the outer wall of the rotating shaft 3, a groove 4 is formed in the outer wall of one side of the rotating shaft 3, a frame 8 is installed on the inner wall of one side of the screening tank main body 1, a rotating hole 10 is formed in the inner wall of one side of the frame 8 corresponding to the groove 4, a lifting rod 11 is fixedly welded on the inner wall between the rotating holes 10, an installation groove 5 is formed in the inner wall of one side of the rotating shaft 3, a lifting groove 6 is formed in the inner wall of one side of the installation groove 5 corresponding to the lifting rod 11, springs 7 are fixedly welded on the inner walls of two sides of the installation groove 5, the other ends of the springs 7 are welded on the outer wall of the lifting rod 11, filter screens 9 are symmetrically embedded and connected on the inner wall of one side of the frame 8, arc-shaped convex blocks 12 are fixedly distributed on the outer wall of the, the inner wall of the top end of the screening tank body 1 is connected with a feeding pipe 15 in a through mode, the inner wall of the bottom end of the screening tank body 1 is provided with a discharging hole 16, when the screening machine works, granulated graphite is firstly put into the screening tank body 1 through the feeding pipe 15 and then falls on a filter screen 9 in a frame 8, then a motor 2 is started to enable a rotating shaft 3 to rotate, then a rotating hole 10 in the frame 8 rotates along a groove 4 under the action of a lifting rod 11, then the arc-shaped convex block 12 is in rotating contact with a cam 14 on a fixed shaft 13, the lifting rod 11 on the frame 8 is lifted along a lifting groove 6, the frame 8 is in a constantly vibrating state under the action of a spring 7, the granulated graphite can be screened at the moment, and the screened graphite is collected through the discharging hole 16;
in the second step, the mixed materials are taken out and then are put into an isostatic press to be pressed into a cylinder with the diameter of 5-20cm, the surface of the cylinder after isostatic pressing is coated with a layer of resin A, the volume density of the cylinder sample pressed in the second step is 0.5-1.8g/cm3, the resin A adopted in the second step is one or more of phenolic resin, furan resin, epoxy resin, polyester resin, polyvinyl chloride resin and the like, and the thickness of the coating resin A on the surface layer of the sample in the second step is 1-3 mm;
wherein in the third step, the cylinder is put into a vacuum atmosphere furnace, the temperature is raised to 650 ℃ in an oxygen-free environment and is kept for 0.5 to 5 hours for carbonization, in the third step, the temperature is raised to 650 ℃ in 550 ℃ at the temperature raising rate of 5 to 15 ℃/min, preferably, the temperature range is 580 ℃ in 620 ℃, and the temperature keeping time is 0.5 to 1.5 hours;
in the fourth step, the carbonized sample is placed beside a high-temperature heat radiation source, the sample is subjected to combustion-tracing graphitization by using waste heat, the combustion-tracing temperature is 2400-;
in the fifth step, impurities on the outer surface of the graphitized sample are cleaned, and the graphite cathode material of the lithium ion battery is obtained through scattering and screening;
in the sixth step, the negative electrode material is detected by a professional detection device, unqualified materials are screened, and the finished material is recorded and stored.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for producing a cathode material by using waste heat with co-firing comprises the following steps: firstly, producing and mixing a negative electrode material; secondly, profiling materials; step three, carbonizing the material; step four, graphitizing the material; step five, material molding; step six, detecting materials; the method is characterized in that:
in the first step, firstly, grinding and grading finished graphite, granulating the graphite, screening the granulated graphite by using a screening machine to obtain a negative electrode material with the average particle size of 5-40 mu m, adding the screened negative electrode material and asphalt into a powder mixer according to the mass ratio of 4: 1-12: 1, and fully mixing for 90-150min under a vacuum condition;
in the second step, taking out the mixed materials, putting the materials into an isostatic press to be pressed into a cylinder with the diameter of 5-20cm, and wrapping a layer of resin A on the surface of the cylinder after isostatic pressing;
wherein in the third step, the cylinder is put into a vacuum atmosphere furnace, the temperature is raised to 550-650 ℃ in an oxygen-free environment, and the temperature is kept for 0.5-5h for carbonization;
in the fourth step, the carbonized sample is placed beside a high-temperature heat radiation source, the sample is subjected to combustion-tracing graphitization by using waste heat, and the combustion-tracing temperature is 2400-3200 ℃;
in the fifth step, impurities on the outer surface of the graphitized sample are cleaned, and the graphite cathode material of the lithium ion battery is obtained through scattering and screening;
in the sixth step, the negative electrode material is detected by a professional detection device, unqualified materials are screened, and the finished material is recorded and stored.
2. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: in the first step, the screening machine comprises a screening tank main body (1), a motor (2), a rotating shaft (3), a groove (4), a mounting groove (5), a lifting groove (6), a spring (7), a frame (8), a filter screen (9), a rotating hole (10), a lifting rod (11), an arc-shaped convex block (12), a fixing shaft (13), a cam (14), an inlet pipe (15) and a discharge hole (16), wherein the motor (2) is embedded and mounted on the inner wall of the top end of the screening tank main body (1), the rotating shaft (3) is mounted on the inner wall of one side of the screening tank main body (1), one end of an output shaft of the motor (2) is fixedly connected onto the outer wall of the rotating shaft (3), the groove (4) is formed in the outer wall of one side of the rotating shaft (3), the frame (8) is mounted on the inner wall of one side of the screening tank main body (1), the rotating hole (, the inner wall between the rotating holes (10) is welded and fixed with a lifting rod (11), one side inner wall of the rotating shaft (3) is provided with a mounting groove (5), one side inner wall of the mounting groove (5) is provided with a lifting groove (6) corresponding to the lifting rod (11), the inner walls of the two sides of the mounting groove (5) are welded and fixed with springs (7), the other ends of the springs (7) are welded on the outer wall of the lifting rod (11), one side inner wall of the frame (8) is symmetrically embedded and connected with a filter screen (9), the outer wall of the bottom end of the frame (8) is distributed and welded and fixed with arc-shaped convex blocks (12), one side inner wall of the screening tank main body (1) is fixedly connected with a fixed shaft (13), the outer wall of one end of the fixed shaft (13) is fixedly provided with a cam (14), and the inner wall of the top end of the screening tank, a discharge hole (16) is formed in the inner wall of the bottom end of the screening tank main body (1).
3. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: the bulk density of the cylindrical sample pressed in the second step is 0.5-1.8g/cm 3.
4. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: and the resin A adopted in the second step is one or more of phenolic resin, furan resin, epoxy resin, polyester resin, polyvinyl chloride resin and the like.
5. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: and in the second step, the thickness of the resin A wrapped on the surface layer of the sample is 1-3 mm.
6. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: in the third step, the temperature is raised to 550-.
7. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: in the fourth step, the heating time of the temperature of the concomitant burning graphitization is 1.0-2.5 h.
8. The method for producing the cathode material by using the co-firing of the waste heat according to claim 1, wherein: the average particle size of the coal tar pitch in the first step is 5-8 mu m, and the softening point of the coal tar pitch is 100-300 ℃.
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| CN202011551702.0A CN112479200A (en) | 2020-12-24 | 2020-12-24 | Method for producing cathode material by using waste heat with co-firing |
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| CN202011551702.0A CN112479200A (en) | 2020-12-24 | 2020-12-24 | Method for producing cathode material by using waste heat with co-firing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115899706A (en) * | 2022-12-05 | 2023-04-04 | 安化县泰森循环科技有限公司 | Useless lithium cell oxygen-free carbonization pyrolysis oven of continuous type |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070128518A1 (en) * | 2004-02-12 | 2007-06-07 | Mitsubishi Chemical Corporation | Negative electrode material for lithium secondary battery, method for producing same, negative electrode for lithium secondary battery using same, and lithium secondary battery |
| CN102030326A (en) * | 2010-11-22 | 2011-04-27 | 中科恒达石墨股份有限公司 | Preparation method of graphite cathode material |
| CN202829589U (en) * | 2012-09-27 | 2013-03-27 | 江苏舜天高新炭材有限公司 | Multifunctional lengthwise graphitization furnace |
| CN204897411U (en) * | 2015-08-26 | 2015-12-23 | 江苏舜天高新炭材有限公司 | A graphitizing furnace structure for purification of lithium cell anode material graphitization |
| CN105731427A (en) * | 2014-12-12 | 2016-07-06 | 宁波杉杉新材料科技有限公司 | Lithium ion battery graphite anode material and preparation method thereof |
| JP2016122516A (en) * | 2014-12-24 | 2016-07-07 | Ｊｆｅケミカル株式会社 | Negative electrode material for lithium ion secondary battery and manufacturing method thereof, negative electrode for lithium ion secondary battery arranged by use thereof, and lithium ion secondary battery |
| CN105841500A (en) * | 2016-04-15 | 2016-08-10 | 贵州顺安机电设备有限公司 | Energy-saving method and device of lengthwise graphitization furnace |
| CN106738469A (en) * | 2016-12-12 | 2017-05-31 | 郑州搜趣信息技术有限公司 | A kind of depth waste or used plastics particulate burning purifying screening plant |
| CN106914414A (en) * | 2017-05-04 | 2017-07-04 | 冷国强 | A kind of petroleum coke high throughput screening devices |
| CN107482203A (en) * | 2017-08-21 | 2017-12-15 | 北方奥钛纳米技术有限公司 | The coating modification method and graphite cathode material of graphite cathode material and application |
| CN109970052A (en) * | 2019-02-27 | 2019-07-05 | 福建翔丰华新能源材料有限公司 | A kind of method of natural graphite granulation and secondary coating modification |
| CN111048785A (en) * | 2019-12-27 | 2020-04-21 | 深圳市金润能源材料有限公司 | Negative electrode material, preparation method thereof, electrode plate and battery |
| CN111229598A (en) * | 2018-11-28 | 2020-06-05 | 黎统兵 | Agricultural livestock and poultry feed screening machine |
| CN111463416A (en) * | 2020-04-14 | 2020-07-28 | 广东东岛新能源股份有限公司 | Low-cost low-expansion-rate long-circulation natural graphite-based composite material and preparation method and application thereof |
-
2020
- 2020-12-24 CN CN202011551702.0A patent/CN112479200A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070128518A1 (en) * | 2004-02-12 | 2007-06-07 | Mitsubishi Chemical Corporation | Negative electrode material for lithium secondary battery, method for producing same, negative electrode for lithium secondary battery using same, and lithium secondary battery |
| CN102030326A (en) * | 2010-11-22 | 2011-04-27 | 中科恒达石墨股份有限公司 | Preparation method of graphite cathode material |
| CN202829589U (en) * | 2012-09-27 | 2013-03-27 | 江苏舜天高新炭材有限公司 | Multifunctional lengthwise graphitization furnace |
| CN105731427A (en) * | 2014-12-12 | 2016-07-06 | 宁波杉杉新材料科技有限公司 | Lithium ion battery graphite anode material and preparation method thereof |
| JP2016122516A (en) * | 2014-12-24 | 2016-07-07 | Ｊｆｅケミカル株式会社 | Negative electrode material for lithium ion secondary battery and manufacturing method thereof, negative electrode for lithium ion secondary battery arranged by use thereof, and lithium ion secondary battery |
| CN204897411U (en) * | 2015-08-26 | 2015-12-23 | 江苏舜天高新炭材有限公司 | A graphitizing furnace structure for purification of lithium cell anode material graphitization |
| CN105841500A (en) * | 2016-04-15 | 2016-08-10 | 贵州顺安机电设备有限公司 | Energy-saving method and device of lengthwise graphitization furnace |
| CN106738469A (en) * | 2016-12-12 | 2017-05-31 | 郑州搜趣信息技术有限公司 | A kind of depth waste or used plastics particulate burning purifying screening plant |
| CN106914414A (en) * | 2017-05-04 | 2017-07-04 | 冷国强 | A kind of petroleum coke high throughput screening devices |
| CN107482203A (en) * | 2017-08-21 | 2017-12-15 | 北方奥钛纳米技术有限公司 | The coating modification method and graphite cathode material of graphite cathode material and application |
| CN111229598A (en) * | 2018-11-28 | 2020-06-05 | 黎统兵 | Agricultural livestock and poultry feed screening machine |
| CN109970052A (en) * | 2019-02-27 | 2019-07-05 | 福建翔丰华新能源材料有限公司 | A kind of method of natural graphite granulation and secondary coating modification |
| CN111048785A (en) * | 2019-12-27 | 2020-04-21 | 深圳市金润能源材料有限公司 | Negative electrode material, preparation method thereof, electrode plate and battery |
| CN111463416A (en) * | 2020-04-14 | 2020-07-28 | 广东东岛新能源股份有限公司 | Low-cost low-expansion-rate long-circulation natural graphite-based composite material and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 商业部燃料局: "《蜂窝煤机的使用与保养》", 31 October 1978, 中国财政经济出版社 * |
| 国家冶金工业局: "《中国钢铁工业生产统计指标体系指标解释》", 31 October 1999, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115899706A (en) * | 2022-12-05 | 2023-04-04 | 安化县泰森循环科技有限公司 | Useless lithium cell oxygen-free carbonization pyrolysis oven of continuous type |
| CN115899706B (en) * | 2022-12-05 | 2024-02-06 | 安化县泰森循环科技有限公司 | Continuous waste lithium battery anaerobic carbonization pyrolysis furnace |
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