CN115739394A - Manufacturing method for reducing content of magnetic substances in natural graphite negative electrode material - Google Patents
Manufacturing method for reducing content of magnetic substances in natural graphite negative electrode material Download PDFInfo
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- CN115739394A CN115739394A CN202211475920.XA CN202211475920A CN115739394A CN 115739394 A CN115739394 A CN 115739394A CN 202211475920 A CN202211475920 A CN 202211475920A CN 115739394 A CN115739394 A CN 115739394A
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Abstract
The invention provides a manufacturing method for reducing the content of magnetic substances in a natural graphite cathode material, which relates to the technical field of natural graphite and comprises the following steps: s1, testing natural graphite, and then putting the natural graphite into impurity removal equipment for air separation and impurity removal; s2, carrying out first magnetic separation on natural graphite after coarse crushing, fine crushing, spheroidization and purification; s3, performing coating and carbonization operations after the first magnetic separation; s4, performing high-temperature treatment on the treated natural graphite under the protection of nitrogen, and performing secondary magnetic separation; and S5, packaging and warehousing the obtained natural graphite. According to the invention, the natural graphite is conveyed in the conveying device under the protection of nitrogen and is subjected to high-temperature treatment, so that the condition that Fe simple substances decomposed by FeS in the natural graphite in the heating process and iron simple substances generated by equipment abrasion are not oxidized into ferric oxide under the protection of nitrogen and are easily adsorbed and removed by electromagnetic iron removal equipment during secondary magnetic separation is avoided, and the effect of reducing the content of magnetic substances in the natural graphite cathode material is achieved.
Description
Technical Field
The invention relates to the technical field of natural graphite, in particular to a manufacturing method for reducing the content of magnetic substances in a natural graphite cathode material.
Background
The lithium ion battery cathode carbon material is commercialized, and has the characteristics of high energy density, long cycle, no memory effect, environmental friendliness and the like, so that the lithium ion battery cathode carbon material is widely applied to 3C electronic portable products, new energy automobiles and other social fields, and the content of a magnetic substance in the cathode material is one of important factors influencing the safety of the lithium ion battery. The content of the magnetic foreign matters is an important standard for measuring the quality of the lithium ion battery cathode material. When a small amount of metal impurities, especially magnetic substances, exist in the negative electrode material, the negative electrode material can pierce through the diaphragm inside the battery to form a micro short circuit, and the safety performance of the battery is seriously influenced.
For example, chinese patent CN111446421A discloses a graphite negative electrode for a low-magnetic impurity lithium battery and a preparation method thereof, comprising the following steps: step one, preparing powder; step two, adding a binder; step three, granulating; step four, graphitizing; step five, demagnetizing and screening; step six, installing a collector; step seven, detecting and recording, wherein in the step one, the carbon materials are put into a crusher to be crushed and filtered to obtain fine powder with the average particle size of 8-15um, the filtered particles are crushed and screened again, then the treated fine powder is oxidized, and finally powder is collected.
In the prior art, feS exists in natural graphite, in the heating process, the FeS is firstly decomposed into Fe simple substances due to the existence of oxygen, carbon steel equipment is used in the processing process of the natural graphite, iron filings abraded by the equipment exist in the form of the iron simple substances when spherical graphite is processed, in the carbonization coating process, the natural graphite is exposed in the air to fill a crucible, a large amount of air exists, due to the existence of the oxygen, iron can be oxidized into ferric oxide in the carbonization process, the ferric oxide is weak magnetic, and the iron is difficult to remove by using electromagnetic iron removal equipment, so that the existing iron simple substances are prevented from reacting in the early stage, and the efficiency of subsequent electromagnetic iron removal can be effectively improved.
Disclosure of Invention
The invention aims to solve the problems that FeS exists in natural graphite, the FeS is firstly decomposed into Fe simple substance in the heating process due to the existence of oxygen, the natural graphite uses carbon steel equipment in the processing process, scrap iron abraded by the equipment exists in the form of iron simple substance when spherical graphite is processed due to the abrasion of the carbon steel equipment, and in the carbonization coating process, the natural graphite is exposed in the air to fill a crucible and has a large amount of air, iron can be oxidized into ferric oxide in the carbonization process due to the existence of the oxygen, the ferric oxide is weak magnetic, and the iron is difficult to remove by using electromagnetic iron removal equipment, so the existing iron simple substance is prevented from reacting in the early stage, and the subsequent electromagnetic iron removal efficiency can be effectively improved.
In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material comprises the following steps:
s1, testing natural graphite, putting the natural graphite into impurity removal equipment, and performing air separation and impurity removal;
s2, carrying out first magnetic separation on the natural graphite after coarse crushing, fine crushing, spheroidization and purification;
s3, carrying out coating and carbonization operations after the first magnetic separation; the pneumatic transmission before and after the coating and carbonization processes is protected by nitrogen atmosphere, and the coating and carbonization processes are protected by nitrogen atmosphere;
s4, carrying out secondary magnetic separation on the treated natural graphite under the protection of nitrogen;
and S5, packaging and warehousing the obtained natural graphite.
In the step S4, the treated natural graphite is subjected to high temperature treatment under the protection of nitrogen, and then subjected to secondary magnetic separation, specifically including the following steps:
s41, conveying the carbonized natural graphite in a conveying device under the protection of nitrogen and carrying out high-temperature treatment;
s42, scattering and mixing the natural graphite;
s43, screening;
and S44, carrying out secondary magnetic separation.
Preferably, in the step S2, the first magnetic separation after the coarse crushing, the fine crushing, the spheroidization and the purification of the natural graphite specifically comprises the following steps:
s21, carrying out coarse crushing, fine crushing, spheroidization and purification on the natural graphite;
s22, grading and purifying the finely crushed natural graphite;
and S23, drying and then carrying out primary magnetic separation.
Preferably, conveyor in step S41, include the bottom plate and store the storehouse, the upside fixedly connected with screw delivery mechanism of bottom plate, screw delivery mechanism upside fixed mounting has nitrogen gas circulation protection mechanism, nitrogen gas circulation protection mechanism 'S upper end with store the inside fixed connection in storehouse, screw delivery mechanism' S one end fixed mounting has the mechanism of sealing, nitrogen gas circulation protection mechanism includes the pneumatic pump, the upside fixedly connected with first branch pipe of pneumatic pump, the first filtration mouth of other end fixedly connected with of first branch pipe, the outer fixed surface of first branch pipe is connected with the nitrogen gas takeover, the surface of first branch pipe just is located the top fixedly connected with second of nitrogen gas takeover is taken over, the other end fixedly connected with second filtration mouth of second branch pipe, the downside fixedly connected with conveyer pipe of pneumatic pump, the inside groove has been seted up to the inner wall of conveyer pipe, the inner wall fixedly connected with two-way pipe of inside groove, the middle part fixedly connected with output tube of two-way pipe, the other end of output tube with the output end fixed connection of pneumatic pump.
Preferably, the outlet of the conveying pipe is fixedly connected with a fixing clamp, the upper side of the fixing clamp is fixedly connected with a side plate, and the upper side of the side plate is fixedly connected with an upper cover.
Preferably, a hydraulic cylinder is fixedly mounted on the lower side of the upper cover, a baffle is rotatably connected to the lower end of a movable rod of the hydraulic cylinder, and one side of the baffle is rotatably connected with one side of the fixing clamp.
Preferably, the outside lower part fixedly connected with base of conveyer pipe, the upside fixedly connected with of conveyer pipe goes into the feed bin, the inner wall of conveyer pipe rotates and is connected with screw thread propelling movement pole.
Preferably, the inside of going into the feed bin rotates and is connected with the connecting shaft, the surface middle part of connecting shaft just is located the inner chamber fixed mounting who goes into the feed bin has the stirring fan.
Preferably, the outer surface middle fixed mounting of stirring fan has the second driven gear, the surface rotation of stirring fan is connected with the connecting block, the inside rotation of connecting block is connected with the sleeve, the outer surface fixed mounting of sleeve has first driven gear, the outside of first driven gear with the outside meshing of second driven gear is connected.
Preferably, one end of the sleeve shaft is fixedly mounted with one end of the threaded pushing rod, and a driven belt wheel is fixedly mounted on the outer side of the other end of the sleeve shaft.
Preferably, the outer side of the driven belt wheel is movably connected with a belt, the inner side of the other end of the belt is movably connected with a driving belt wheel, a servo motor is fixedly mounted in the middle of the driving belt wheel, and the lower side of the servo motor is fixedly connected with the upper side of the bottom plate.
Compared with the prior art, the invention has the advantages and positive effects that,
1. according to the invention, the natural graphite is conveyed in the conveying device under the protection of nitrogen and is subjected to high-temperature treatment, so that the condition that Fe simple substances decomposed by FeS in the heating process and iron simple substances generated by equipment abrasion in the natural graphite are not oxidized into ferric oxide under the protection of nitrogen, and are easily adsorbed and removed by electromagnetic iron removal equipment during secondary magnetic separation is avoided, and the effect of reducing the content of magnetic substances in the natural graphite cathode material is achieved.
2. According to the invention, the natural graphite is protected by nitrogen by arranging a nitrogen circulating protection mechanism, so that the iron simple substance is prevented from being reacted, the subsequent electromagnetic iron removal efficiency is improved, the carbonized natural graphite is placed in a storage bin, at the moment, a pneumatic pump is started to generate suction force, gas in a first branch pipe and a second branch pipe is extracted, air in the upper part and the lower part of the storage bin is extracted through a first filtering port and a second filtering port which are respectively connected with ports of the first branch pipe and the second branch pipe and is converged into the first branch pipe, meanwhile, a nitrogen connecting pipe is connected with a nitrogen source, the nitrogen is converged into the first branch pipe, the nitrogen enters an output pipe through pressurization of the pneumatic pump, after the nitrogen is distributed to two sides through the second branch pipe, a part of the nitrogen is left and right in a conveying pipe, the left part of the nitrogen returns to the lower part of the storage bin from the left end of the conveying pipe, so that the circulating flow of a part of the nitrogen is achieved, the natural graphite in conveying is protected, and the right part of the nitrogen avoids the air at the outlet end from entering and influencing the high temperature treatment of the natural graphite.
3. According to the invention, the spiral conveying mechanism is arranged to convey natural graphite with small components, so that the contact surface with nitrogen is improved, more air is removed, and subsequent iron removal is facilitated.
Drawings
FIG. 1 is a schematic flow chart of a manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material according to the present invention;
fig. 2 is a schematic view of a first perspective three-dimensional structure of a conveying device in a manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material according to the present invention;
FIG. 3 is a schematic structural diagram of a second view angle of a conveying device in the manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to the present invention;
FIG. 4 is a schematic structural diagram of the interior of the screw conveying mechanism of the conveying device in the manufacturing method for reducing the content of the magnetic substance in the natural graphite cathode material according to the present invention;
FIG. 5 is a schematic structural diagram of a power part of a screw conveying mechanism of a conveying device in the manufacturing method for reducing the content of magnetic substances in a natural graphite cathode material;
FIG. 6 is a schematic structural diagram of a sealing mechanism of a conveying device in a manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material according to the present invention;
FIG. 7 is a schematic structural diagram of the interior of a nitrogen circulation protection mechanism of a conveying device in the manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material;
fig. 8 is an enlarged schematic view of a portion a in fig. 7.
Illustration of the drawings: 1. a base plate; 2. a screw conveying mechanism; 21. a base; 22. a threaded push rod; 23. a delivery pipe; 24. a connecting shaft; 25. a stirring fan; 26. feeding into a storage bin; 27. a second driven gear; 28. connecting blocks; 29. a first driven gear; 210. a belt; 211. a driven pulley; 212. a sleeve shaft; 213. a driving pulley; 214. a servo motor; 3. a storage bin; 4. a nitrogen circulation protection mechanism; 41. a first filter port; 42. a first branch pipe; 43. a nitrogen gas connecting pipe; 44. a second branch pipe; 45. a second filter port; 46. a pneumatic pump; 47. an output pipe; 48. a two-way pipe; 49. an inner tank; 5. a sealing mechanism; 51. an upper cover; 52. a hydraulic cylinder; 53. a side plate; 54. a baffle plate; 55. a fixing clip.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the present invention is not limited to the specific embodiments disclosed in the following description.
Example 1
As shown in fig. 1 to 8, the present invention provides a manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material, the method comprising the steps of:
the method comprises the following steps: inspecting natural graphite, and then putting the natural graphite into impurity removal equipment for air separation and impurity removal;
step two: the method comprises the following steps of performing coarse crushing, fine crushing, spheroidization and first magnetic separation after purification on natural graphite, and specifically comprises the following steps:
21 Coarse crushing, fine crushing, spheroidizing and purifying natural graphite;
22 ) classifying and purifying the finely ground natural graphite;
23 ) carrying out drying treatment and then carrying out first magnetic separation;
step three: carrying out coating and carbonization operations after the first magnetic separation; the pneumatic transmission before and after the coating and carbonization processes is protected by nitrogen atmosphere, and the coating and carbonization processes are protected by nitrogen atmosphere;
step four: and (3) carrying out high-temperature treatment on the treated natural graphite under the protection of nitrogen, and then carrying out secondary magnetic separation, wherein the method specifically comprises the following steps:
41 Conveying the carbonized natural graphite in a conveying device under the protection of nitrogen and carrying out high-temperature treatment;
42 ) breaking up and mixing natural graphite;
43 ) screening;
44 ) carrying out second magnetic separation;
step five: and packaging and warehousing the obtained natural graphite.
The natural graphite is conveyed in the conveying device under the protection of nitrogen and is subjected to high-temperature treatment, so that the condition that Fe simple substances decomposed by FeS in the heating process and iron simple substances generated by equipment abrasion in the natural graphite are not oxidized into ferric oxide under the protection of nitrogen is avoided, and the natural graphite can be easily adsorbed and removed by electromagnetic iron removal equipment during secondary magnetic separation, and the effect of reducing the content of magnetic substances in the natural graphite cathode material is achieved.
Example 2
As shown in fig. 1-8, the conveying device in step S41 includes a bottom plate 1 and a storage bin 3, the upper side of the bottom plate 1 is fixedly connected with a spiral conveying mechanism 2, the upper side of the spiral conveying mechanism 2 is fixedly provided with a nitrogen circulation protection mechanism 4, the upper end of the nitrogen circulation protection mechanism 4 is fixedly connected with the inside of the storage bin 3, one end of the spiral conveying mechanism 2 is fixedly provided with a sealing mechanism 5, the nitrogen circulation protection mechanism 4 includes a pneumatic pump 46, the upper side of the pneumatic pump 46 is fixedly connected with a first branch pipe 42, the other end of the first branch pipe 42 is fixedly connected with a first filtering port 41, the outer surface of the first branch pipe 42 is fixedly connected with a nitrogen adapter 43, the outer surface of the first branch pipe 42 and above the nitrogen adapter 43 are fixedly connected with a second branch pipe 44, the other end of the second branch pipe 44 is fixedly connected with a second filtering port 45, the lower side of the pneumatic pump 46 is fixedly connected with a conveying pipe 23, the inner wall of the conveying pipe 23 is provided with an inner groove 49, the inner wall of the inner groove 49 is fixedly connected with a two-way pipe 48, the middle part of the two-way pipe 48 is fixedly connected with an output pipe 47, the other end of the output pipe 47 is fixedly connected with the output end of the pneumatic pump 46, the outer side of the outlet of the conveying pipe 23 is fixedly connected with a fixing clamp 55, the upper side of the fixing clamp 55 is fixedly connected with a side plate 53, the upper side of the side plate 53 is fixedly connected with an upper cover 51, the lower side of the upper cover 51 is fixedly provided with a hydraulic cylinder 52, the lower end of a movable rod of the hydraulic cylinder 52 is rotatably connected with a baffle plate 54, one side of the baffle plate 54 is rotatably connected with one side of the fixing clamp 55
Through the arrangement of the nitrogen circulation protection mechanism 4, the natural graphite is protected by nitrogen, the iron simple substance is prevented from being reacted, the subsequent electromagnetic iron removal efficiency is improved, the carbonized natural graphite is placed in the storage bin 3, at the moment, the pneumatic pump 46 is started, the pneumatic pump 46 generates suction force, gas in the first branch pipe 42 and the second branch pipe 44 is extracted, the first filtering port 41 and the second filtering port 45 which are respectively connected to the ports of the first branch pipe 42 and the second branch pipe 44 are used for extracting air in the upper part and the lower part of the storage bin 3 and converging the air into the first branch pipe 42, meanwhile, the nitrogen connecting pipe 43 is connected with a nitrogen source, the nitrogen is converged into the first branch pipe 42, the nitrogen enters the output pipe 47 through pressurization of the pneumatic pump 46, after being distributed to two sides through the second branch pipe 48, a part of the nitrogen is distributed to the left side in the conveying pipe 23, a part of the nitrogen is right side, a part of the nitrogen returns to the lower part of the storage bin 3 from the left end of the conveying pipe 23, so as to achieve circulation flow of a part of the nitrogen, the natural graphite in the conveying is protected, and the natural graphite in the conveying process, and the natural graphite at the outlet end of the right side is prevented from entering the high temperature process of the natural graphite conveying pipe 23 from the high temperature process.
Example 3
As shown in fig. 1-8, a base 21 is fixedly connected to the lower portion of the outer side of the conveying pipe 23, a feeding bin 26 is fixedly connected to the upper side of the conveying pipe 23, a threaded pushing rod 22 is connected to the inner wall of the conveying pipe 23 in a rotating manner, a connecting shaft 24 is connected to the inner portion of the feeding bin 26 in a rotating manner, a stirring fan 25 is fixedly installed in the middle of the outer surface of the connecting shaft 24 and in the inner cavity of the feeding bin 26, a second driven gear 27 is fixedly installed in the middle of the outer surface of the stirring fan 25, a connecting block 28 is connected to the outer surface of the stirring fan 25 in a rotating manner, a sleeve shaft 212 is connected to the inner portion of the connecting block 28 in a rotating manner, a first driven gear 29 is fixedly installed on the outer surface of the sleeve shaft 212, the outer side of the first driven gear 29 is engaged with the outer side of the second driven gear 27, one end of the sleeve shaft 212 is fixedly installed with one end of the threaded pushing rod 22, a driven pulley 211 is fixedly installed on the outer side of the sleeve shaft 212, a belt 210 is movably connected to the outer side of the driven pulley 211, a belt 210 is movably connected to the other end of the belt 210, a driving pulley 213 is movably connected to the middle of the driving pulley 213, a servo motor 214 is fixedly installed to the middle of the driving pulley 213, and the servo motor 214 is fixedly connected to the lower side of the upper side of the bottom plate 1.
Through setting up screw conveyor 2, realize carrying out the transport of miniwatt with natural graphite, improve the contact surface with nitrogen gas, get rid of more air, be convenient for follow-up deironing, after nitrogen gas circulation a period, start servo motor 214, servo motor 214 drives driving pulley 213 and rotates, under driving pulley 213 drives belt 210 pivoted circumstances, driven pulley 211 obtains power and drives sleeve 212 and rotate, sleeve 212 drives first driven gear 29 and screw thread propelling movement pole 22 simultaneously and rotates, first driven gear 29 meshes the rotation of second driven gear 27, second driven gear 27 drives connecting shaft 24 and rotates at the inside of connecting block 28 and pan feeding storehouse 26, stirring fan 25 is driven by connecting shaft 24, break up the natural graphite in storehouse 3, let nitrogen gas fully contact with natural graphite, make the natural graphite of nitrogen gas effective protection, screw thread propelling movement pole 22 rotates in conveyer pipe 23, the natural graphite that will be protected by nitrogen gas removes the transport in conveyer pipe 23, pneumatic cylinder 52 works, the movable rod part extension, promote baffle 54 and the tie point of fixation clamp 55 to rotate round, from this natural graphite port that high temperature was handled, the graphite that is transferred after handling.
The using method and the working principle of the device are as follows: placing natural graphite in a storage bin 3, starting a pneumatic pump 46 at the moment, generating suction by the pneumatic pump 46, extracting gas in a first branch pipe 42 and a second branch pipe 44, extracting air in the upper part and the lower part of the storage bin 3 through a first filtering port 41 and a second filtering port 45 which are respectively connected with the ports of the first branch pipe 42 and the second branch pipe 44, converging the air into the first branch pipe 42, connecting a nitrogen connecting pipe 43 with a nitrogen source, converging the nitrogen into the first branch pipe 42, pressurizing the nitrogen through the pneumatic pump 46, enabling the nitrogen to enter an output pipe 47, distributing the nitrogen to two sides through a two-way pipe 48, enabling a part of the nitrogen to be leftwards in a conveying pipe 23, enabling a part of the nitrogen to be rightwards, returning the part of the nitrogen to the lower part of the storage bin 3 from the left end of the conveying pipe 23, achieving circulating flow of the part of the nitrogen, protecting the natural graphite in conveying, preventing the air at the outlet end of the conveying pipe 23 from entering high temperature treatment which affects the natural graphite, after the nitrogen gas circulates for a period of time, the servo motor 214 is started, the servo motor 214 drives the driving pulley 213 to rotate, under the condition that the driving pulley 213 drives the belt 210 to rotate, the driven pulley 211 obtains power to drive the sleeve shaft 212 to rotate, the sleeve shaft 212 drives the first driven gear 29 and the threaded push rod 22 to rotate at the same time, the first driven gear 29 is meshed with the second driven gear 27 to rotate, the second driven gear 27 drives the connecting shaft 24 to rotate inside the connecting block 28 and the feeding bin 26, the stirring fan 25 is driven by the connecting shaft 24 to scatter the natural graphite in the storage bin 3, the nitrogen gas is fully contacted with the natural graphite, the natural graphite effectively protected by the nitrogen gas is enabled, the threaded push rod 22 rotates in the conveying pipe 23, the natural graphite protected by the nitrogen gas is conveyed in the conveying pipe 23 in a moving mode, the hydraulic cylinder 52 works, the movable rod extends partially, the pushing flap 54 is rotated about the connection point with the fixing clip 55, whereby the port of the feed pipe 23 is opened and the high-temperature treated natural graphite is transferred out.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (10)
1. A manufacturing method for reducing the content of magnetic substances in a natural graphite negative electrode material is characterized by comprising the following steps:
s1, testing natural graphite, putting the natural graphite into impurity removal equipment, and performing air separation and impurity removal;
s2, carrying out first magnetic separation on natural graphite after coarse crushing, fine crushing, spheroidization and purification;
s3, coating and carbonizing the natural graphite subjected to the first magnetic separation; the pneumatic transmission before and after the coating and carbonization processes is protected by nitrogen atmosphere, and the coating and carbonization processes are protected by nitrogen atmosphere;
s4, carrying out secondary magnetic separation on the treated natural graphite under the protection of nitrogen;
s5, packaging and warehousing the obtained natural graphite;
in the step S4, the treated natural graphite is subjected to high temperature treatment under the protection of nitrogen, and then subjected to secondary magnetic separation, specifically including the following steps:
s41, conveying the carbonized natural graphite in a conveying device under the protection of nitrogen and carrying out high-temperature treatment;
s42, scattering and mixing the natural graphite;
s43, screening;
and S44, carrying out secondary magnetic separation.
2. The manufacturing method for reducing the content of the magnetic substances in the natural graphite negative electrode material according to claim 1, wherein in the step S2, the natural graphite is subjected to coarse crushing, fine crushing, spheroidization and first magnetic separation after purification, and the method specifically comprises the following steps:
s21, carrying out coarse crushing, fine crushing, spheroidization and purification on natural graphite;
s22, finely crushing the spheroidized natural graphite, and grading and purifying;
and S23, drying and then carrying out primary magnetic separation.
3. The manufacturing method for reducing the content of the magnetic substances in the negative electrode material of natural graphite according to claim 1, wherein the conveying device in the step S41 comprises a bottom plate (1) and a storage bin (3), a spiral conveying mechanism (2) is fixedly connected to the upper side of the bottom plate (1), a nitrogen circulation protection mechanism (4) is fixedly mounted on the upper side of the spiral conveying mechanism (2), the upper end of the nitrogen circulation protection mechanism (4) is fixedly connected with the inside of the storage bin (3), a sealing mechanism (5) is fixedly mounted at one end of the spiral conveying mechanism (2), the nitrogen circulation protection mechanism (4) comprises a pneumatic pump (46), a first branch pipe (42) is fixedly connected to the upper side of the pneumatic pump (46), a first filtering port (41) is fixedly connected to the other end of the first branch pipe (42), a nitrogen connecting pipe (43) is fixedly connected to the outer surface of the first branch pipe (42), a second branch pipe (44) is fixedly connected to the outer surface of the first branch pipe (42) and located above the nitrogen connecting pipe (43), a second filtering port (45) is fixedly connected to the other end of the second branch pipe (44), an inner wall (23) of the conveying pipe (23) is fixedly connected to the inner wall (48), and a second branch pipe (48) is connected to the inner wall of the conveying pipe (23), the middle part of the two-way pipe (48) is fixedly connected with an output pipe (47), and the other end of the output pipe (47) is fixedly connected with the output end of the pneumatic pump (46).
4. The manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to claim 3, is characterized in that: the utility model discloses a conveying pipe, including conveyer pipe (23), the exit outside fixedly connected with fixation clamp (55) of conveyer pipe (23), the upside fixedly connected with curb plate (53) of fixation clamp (55), the upside fixedly connected with upper cover (51) of curb plate (53).
5. The manufacturing method for reducing the content of the magnetic substances in the natural graphite negative electrode material according to claim 4, is characterized in that: the lower side of the upper cover (51) is fixedly provided with a hydraulic cylinder (52), the lower end of a movable rod of the hydraulic cylinder (52) is rotatably connected with a baffle (54), and one side of the baffle (54) is rotatably connected with one side of the fixing clamp (55).
6. The manufacturing method for reducing the content of the magnetic substances in the natural graphite negative electrode material according to claim 3, is characterized in that: the outside lower part fixedly connected with base (21) of conveyer pipe (23), upside fixedly connected with income feed bin (26) of conveyer pipe (23), the inner wall of conveyer pipe (23) is rotated and is connected with screw thread propelling movement pole (22).
7. The manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to claim 6, is characterized in that: go into the inside rotation of feed bin (26) and be connected with even axle (24), the surface middle part of even axle (24) just is located the inner chamber fixed mounting who goes into feed bin (26) has stirring fan (25).
8. The manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to claim 7, is characterized in that: the surface middle part fixed mounting of stirring fan (25) has second driven gear (27), the surface rotation of stirring fan (25) is connected with connecting block (28), the inside rotation of connecting block (28) is connected with sleeve (212), the surface fixed mounting of sleeve (212) has first driven gear (29), the outside of first driven gear (29) with the outside meshing of second driven gear (27) is connected.
9. The manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to claim 8, is characterized in that: one end of the sleeve shaft (212) is fixedly installed with one end of the threaded pushing rod (22), and a driven belt wheel (211) is fixedly installed on the outer side of the other end of the sleeve shaft (212).
10. The manufacturing method for reducing the content of the magnetic substance in the natural graphite negative electrode material according to claim 9, is characterized in that: the outside swing joint of driven pulley (211) has belt (210), the inboard swing joint of the other end of belt (210) has driving pulley (213), the middle part fixed mounting of driving pulley (213) has servo motor (214), the downside of servo motor (214) with the upside fixed connection of bottom plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211475920.XA CN115739394A (en) | 2022-11-23 | 2022-11-23 | Manufacturing method for reducing content of magnetic substances in natural graphite negative electrode material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211475920.XA CN115739394A (en) | 2022-11-23 | 2022-11-23 | Manufacturing method for reducing content of magnetic substances in natural graphite negative electrode material |
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| Publication Number | Publication Date |
|---|---|
| CN115739394A true CN115739394A (en) | 2023-03-07 |
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| CN202211475920.XA Pending CN115739394A (en) | 2022-11-23 | 2022-11-23 | Manufacturing method for reducing content of magnetic substances in natural graphite negative electrode material |
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2022
- 2022-11-23 CN CN202211475920.XA patent/CN115739394A/en active Pending
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