CN115554910A

CN115554910A - Preparation process of negative electrode material

Info

Publication number: CN115554910A
Application number: CN202211344193.3A
Authority: CN
Inventors: 艾戊云; 孔令超; 袁海中; 袁志强; 吴锡俊
Original assignee: Baise Xinmao New Material Technology Co ltd
Current assignee: Baise Xinmao New Material Technology Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-03
Anticipated expiration: 2042-10-31
Also published as: CN115554910B

Abstract

The invention discloses a preparation process of an anode material, wherein a preparation device adopted by the preparation process comprises a pretreatment mechanism, a crushing mechanism, a mixing mechanism, a granulating mechanism, a grinding mechanism, a graphitization treatment mechanism and a screening and demagnetizing mechanism, the pretreatment mechanism comprises a displacement assembly and a feeding and discharging assembly, the feeding and discharging assembly further comprises a driving module, and the preparation process comprises the following steps of S1: screening pretreatment, S2: mixing materials, S3: granulation and S4: in the invention, the dust and impurities generated by screening are automatically cleaned through a shifting assembly and a cleaning belt in a pretreatment mechanism, and meanwhile, the petroleum coke is automatically fed and discharged through a feeding and discharging assembly, so that the pretreatment efficiency of the petroleum coke is improved; realize quick granulation through granulation belt and unloading roller, nip roll, cooperation low temperature cabinet and vibrator shorten the solidification hardening time of mixture granulation granule, promote granulation efficiency.

Description

Preparation process of negative electrode material

Technical Field

The invention relates to the technical field of preparation of cathode materials, in particular to a preparation process of a cathode material.

Background

The negative electrode refers to the end with lower potential in a power supply, the electrode which generates oxidation reaction in a primary battery is the electrode which loses electrons, the negative electrode material of the lithium ion battery is generally two categories of carbon material and non-carbon material, the carbon material mainly comprises graphite, non-graphite and nano-structure carbon-based negative electrode material, and the carbon material has the characteristics of environmental friendliness, low cost, high specific capacity, good cycle performance, long service life, low chemical potential and the like, wherein the graphite is the negative electrode material with the highest commercialization degree at present.

At present, the main production approach of non-natural graphite is to use petroleum coke or asphalt and other raw materials to perform high-temperature graphitization treatment to obtain graphite, however, the single use of petroleum coke or asphalt to perform graphitization treatment to produce graphite has defects, the petroleum coke is in a porous accumulation shape and is mixed with a large amount of dust and other impurities and is difficult to separate, so that the resistivity of the produced graphite is high, the asphalt is solid at normal temperature and becomes liquid at high temperature during graphitization treatment, the petroleum coke is not suitable for large-scale treatment of a graphitization treatment furnace, the graphite yield is limited, and the asphalt cannot be used for large-scale graphitization production.

Disclosure of Invention

The invention aims to provide a preparation process of a negative electrode material, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation process of a negative electrode material adopts a preparation device which comprises a pretreatment mechanism, a crushing mechanism, a mixing mechanism, a granulation mechanism, a grinding mechanism, a graphitization treatment mechanism and a screening and demagnetizing mechanism;

the pretreatment mechanism comprises a screening cylinder, connecting rods are uniformly arranged on the outer side of the screening cylinder, side discs are arranged at two ends of the screening cylinder, one side of each side disc is connected with a rotating motor, the pretreatment mechanism further comprises a shifting assembly, the shifting assembly comprises a horizontal guide rail frame, the horizontal guide rail frame is connected with a support, the horizontal guide rail frame is arranged at two ends of the screening cylinder, the screening cylinder and the horizontal guide rail frame are installed in a sliding mode, a moving frame is installed on the horizontal guide rail frame in a sliding mode, one end of the moving frame is fixedly installed with the rotating motor, a walking motor is arranged on the horizontal guide rail frame, the walking motor is connected with an output shaft, a rack is arranged on the horizontal guide rail frame, a matching gear is arranged at the position, corresponding to the rack, of the output shaft, the matching gear is meshed with the rack, a cleaning belt is arranged under the moving track of the screening cylinder, the cleaning belt is connected with a belt roller, the belt roller is rotatably installed with the support, and a guide plate is arranged above the cleaning belt;

the device comprises a horizontal guide rail frame, a grinding mechanism, a sieving and demagnetizing mechanism, a stirring barrel, a stirring mechanism, a grinding mechanism and a graphite grinding mechanism, wherein the grinding mechanism is arranged right below one end of the horizontal guide rail frame and comprises a grinding box, grinding rollers are arranged in the grinding box and are symmetrically arranged, the bottom of the grinding roller is connected with the mixing mechanism, the mixing mechanism comprises the stirring barrel, the stirring barrel is also connected with an asphalt pipe, the bottom of the stirring barrel is connected with the granulating mechanism, the granulating mechanism is connected with the grinding mechanism, the grinding mechanism is connected with the graphitizing mechanism through a conveying pipe and a conveying pump, and the graphitizing mechanism is connected with the sieving and demagnetizing mechanism;

the preparation process comprises the following steps:

s1, carrying out screening pretreatment, namely feeding petroleum coke into a screening barrel, starting a rotating motor connected with the screening barrel to drive the screening barrel to rotate, so that the petroleum coke in the screening barrel is subjected to rolling screening, separating dust and other impurity particles in the petroleum coke, and releasing the screened petroleum coke into a crushing mechanism;

s2, mixing materials, namely, after petroleum coke enters a crushing mechanism to be crushed, the petroleum coke falls into a stirring barrel in a mixing mechanism, and the asphalt which is heated to be in a liquid state is introduced into the stirring barrel by combining an asphalt pipe arranged on the stirring barrel, so that the crushed petroleum coke and the asphalt are stirred and mixed in the stirring barrel to form a sludge-shaped mixture, and after the stirring is finished, the mixture is sent into a granulating mechanism;

s3, granulating, namely dispersing the petroleum coke and asphalt mixture into granular solids with the same specification through a granulating mechanism, then sending the granular solids into a grinding mechanism to grind and grind the granular solids to obtain powder, sending the powder into a graphitization treatment mechanism along a conveying pipe, keeping the temperature in the graphitization treatment mechanism between 3000 ℃ and 3400 ℃, and heating for 24 hours to 72 hours;

and S4, screening and demagnetizing the powder after the graphitization treatment is finished.

As a further scheme of the invention: the screening section of thick bamboo still is provided with the business turn over material subassembly, the business turn over material subassembly is including setting up the feed chute on the side disc, the feed chute outside is provided with the feed plate, be provided with the guide way on the side disc, the feed plate passes through guide way slidable mounting, the guide way arc sets up, the centre of a circle of guide way and the centre of rotation of side disc coincide each other.

As a still further scheme of the invention: the feeding and discharging assembly further comprises a discharging groove arranged on the screening barrel, an arc-shaped mounting groove is formed in the side disc, a sealing arc plate is slidably mounted between the arc-shaped mounting grooves, the inner side of the sealing arc plate is tangent to the connecting rod, the end portion of the sealing arc plate is provided with a mounting column, and the sealing arc plate is slidably mounted between the mounting column and the arc-shaped mounting groove.

As a still further scheme of the invention: the feeding and discharging assembly further comprises a driving module, a closed spring is arranged in the guide groove, a jacking spring is arranged in the arc mounting groove, one side, away from the jacking spring, of the closed arc plate is provided with an extending column, a linkage frame is sleeved on a rotating axis of the screening cylinder, the linkage frame is installed in a contact mode with the extending column, a driving frame is installed on the side disc and is in arc-shaped arrangement, and the two ends of the driving frame are installed in edge contact with the linkage frame and the edge of the feeding plate respectively.

As a still further scheme of the invention: crushing awl evenly is provided with on the crushing roller, through gear drive between the crushing roller, the symmetry sets up grind through belt transmission between the roller respectively with the crushing roller of homonymy.

As a still further scheme of the invention: granulation mechanism is including receiving the fill, be provided with the unloading roller in receiving the fill, unloading roller symmetry sets up, the below of unloading roller is provided with the granulation belt, evenly be provided with the granulation groove on the granulation belt, the granulation belt upside is provided with the nip roll, the nip roll corresponds at the opposite side of granulation belt and is provided with the backing roll, the granulation belt is triangle-shaped setting, the horizontal segment of granulation belt is provided with the low temperature cabinet, the slope section cooperation of granulation belt is provided with the vibrator.

As a still further scheme of the invention: screening demagnetization mechanism is including setting up the shale shaker between graphitization processing mechanism and demagnetization section of thick bamboo, the bottom of demagnetization section of thick bamboo is provided with vibrating motor, vibrating motor links to each other with the vibrating arm, the end and the shale shaker contact installation of vibrating arm, install the unloading disc on the vibrating arm, be provided with the electro-magnet in the unloading disc, the downside of demagnetization section of thick bamboo is provided with the stock guide of slope, it is provided with the discharging pipe at the extreme lower position of stock guide to go the magnetism section of thick bamboo.

As a still further scheme of the invention: the feeding disc is arranged in a conical shape, spiral grooves are formed in the upper surface of the feeding disc, the feeding disc is provided with two groups, a guide hopper which is sunken downwards is arranged between the two groups of feeding discs, a guide hole is formed in the middle of the guide hopper, and the edge of the guide hopper is fixedly connected with the demagnetizing cylinder.

Compared with the prior art, the invention has the beneficial effects that:

(1) The position of the screening barrel is adjusted by arranging the horizontal guide rail frame and the shifting assembly, so that dust and impurities can be conveniently cleaned by matching with a cleaning belt during petroleum coke screening pretreatment; the treated petroleum coke is crushed and ground by the crushing mechanism and then mixed with heated liquid asphalt for granulation to form a mixture which is used as a raw material for preparing the cathode material, so that the defect that the petroleum coke is used alone or the asphalt is used alone to prepare the cathode material is overcome, the preparation yield is improved, and the preparation difficulty is reduced;

(2) The rapid feeding and discharging operation of the sieving cylinder is realized by arranging the feeding and discharging assembly, so that the efficiency of petroleum coke sieving pretreatment can be effectively improved;

(3) The rapid granulation is realized through the granulation belt, the blanking roller and the material pressing roller, the solidification hardening time of mixture particles is shortened by matching with the low-temperature box and the vibrator, and the granulation efficiency is improved;

(4) And the vibrating motor is arranged to drive the vibrating screen to vibrate, so that the graphite screening is completed, the blanking disc is driven to vibrate for blanking, and the demagnetizing effect and the demagnetizing efficiency are ensured by matching with the spiral groove.

Drawings

Fig. 1 is a schematic structural diagram of a preparation process of a negative electrode material.

Fig. 2 is a schematic structural diagram of a pretreatment mechanism in a negative electrode material preparation process.

Fig. 3 is a schematic structural diagram of a displacement assembly in a negative electrode material preparation process.

Fig. 4 is a schematic view of a combined structure of a feeding and discharging component and a screening cylinder in the preparation process of the anode material.

Fig. 5 is a schematic view of a splitting structure of a feeding and discharging component and a screening drum in the preparation process of the anode material.

Fig. 6 is a schematic view of an installation structure of a closed arc-shaped plate in a negative electrode material preparation process.

Fig. 7 is a schematic view of a connection structure of a crushing mechanism and a stirring barrel in a negative electrode material preparation process.

Fig. 8 is a schematic structural diagram of a pulverizing mechanism in the anode material preparation process.

Fig. 9 is a schematic structural diagram of a granulation mechanism in the anode material preparation process.

Fig. 10 is a schematic diagram of an internal structure of a demagnetizing cylinder in a negative electrode material preparation process.

In the figure: 1. a pretreatment mechanism; 2. a crushing box; 20. a crushing roller; 21. a grinding roller; 22. crushing cone; 3. a stirring barrel; 30. an asphalt pipe; 4. a granulation mechanism; 40. a receiving hopper; 41. a blanking roller; 42. a granulation tank; 43. a nip roll; 44. a support roll; 45. a low temperature box; 46. a vibrator; 5. a grinding mechanism; 6. a delivery pipe; 60. a delivery pump; 7. a graphitization treatment mechanism; 70. vibrating the screen; 8. a demagnetizing cylinder; 80. blanking a disc; 81. a helical groove; 82. a material guide hopper; 83. a material guide hole; 84. a stock guide; 85. a vibration motor; 86. a vibrating rod; 88. a discharge pipe; 100. a screening drum; 1000. a discharge chute; 101. a connecting rod; 102. a side disc; 103. a rotating electric machine; 104. a movable frame; 105. a horizontal guide rail bracket; 106. a rack; 107. an output shaft; 108. a mating gear; 109. a traveling motor; 1010. cleaning the belt; 1011. a guide plate; 1012. a support; 110. closing the arc-shaped plate; 1101. an arc-shaped mounting groove; 1102. a feeding plate; 1103. a linkage frame; 1104. a driving frame; 1105. a feed chute; 1106. a guide groove; 1107. the spring is tightly propped; 1108. mounting a column; 1109. sleeving the column; 1110. and (5) extending the column.

Detailed Description

In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and thus are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 10, a preparation process of a negative electrode material adopts a preparation device comprising a pretreatment mechanism 1, a crushing mechanism, a mixing mechanism, a granulation mechanism 4, a grinding mechanism 5, a graphitization treatment mechanism 7 and a sieving and demagnetizing mechanism;

as shown in fig. 2 and fig. 3, the pretreatment mechanism 1 includes a sieving cylinder 100, the outer side of the sieving cylinder 100 is uniformly provided with a connecting rod 101, both ends of the sieving cylinder 100 are provided with side discs 102, one side of each side disc 102 is connected with a rotating motor 103, and the pretreatment mechanism further includes a shifting assembly, the shifting assembly includes a horizontal guide rail frame 105, the horizontal guide rail frame 105 is connected with a support 1012, the horizontal guide rail frame 105 is arranged at both ends of the sieving cylinder 100, the sieving cylinder 100 and the horizontal guide rail frame 105 are slidably mounted, a moving frame 104 is slidably mounted on the horizontal guide rail frame 105, one end of the moving frame 104 is fixedly mounted with the rotating motor 103, the horizontal guide rail frame 105 is provided with a walking motor 109, the walking motor 109 is connected with an output shaft 107, the horizontal guide rail frame 105 is provided with a rack 106, a matching gear 108 is arranged at a position of the output shaft 107 corresponding to the rack 106, the matching gear 108 is engaged with the rack 106, a cleaning belt 1010 is arranged right below a moving track of the sieving cylinder 100, the cleaning belt 1010 is connected with the cleaning roller 1012, a rotating installation roller is arranged above the cleaning belt 1010, and a guide plate 1011 is arranged above the belt 1010 is arranged above the cleaning roller 1011;

specifically, in order to reduce the ash content and the impurities of petroleum coke, through sending the petroleum coke into screening section of thick bamboo 100, cooperation rotating electrical machines 103 drives screening section of thick bamboo 100 and rotates, thereby make the petroleum coke in screening section of thick bamboo 100 break away from with dust and other impurities, in order to be convenient for handle the dust and the impurity of separating from the petroleum coke, set up horizontal guide rail frame 105 and carry out slidable mounting to screening section of thick bamboo 100, when screening preliminary treatment carries out, move screening section of thick bamboo 100 to the side and sieve, dust and impurity fall on the clearance belt 1010 of bottom setting, set up deflector 1011 on clearance belt 1010 upside simultaneously, avoid dust and impurity to fall other positions, wherein the width of screening section of thick bamboo 100 is less than conveyor belt's width, can further guarantee the reliable receipt transport processing of impurity, drive output shaft 107 through walking motor 109 after the screening finishes and rotate, combine rack 106 and cooperation gear 108, realize that promotion moves frame 104 and the screening section of thick bamboo 100 that links to each other with moving frame 104 and reach the upside of rubbing crusher, release the petroleum coke and smash in smashing case 2.

As shown in fig. 7 and 8, the pulverizing mechanism is disposed under one end of the horizontal guide rail bracket 105, the pulverizing mechanism includes a pulverizing box 2, pulverizing rollers 20 are disposed in the pulverizing box 2, the pulverizing rollers 20 are symmetrically disposed, grinding rollers 21 are disposed under the pulverizing rollers 20, the grinding rollers 21 are symmetrically disposed, the bottom of the pulverizing box 2 is connected to a mixing mechanism, the mixing mechanism includes a stirring barrel 3, the stirring barrel 3 is further connected to an asphalt pipe 30, the bottom of the stirring barrel 3 is connected to a granulating mechanism 4, the granulating mechanism 4 is connected to a grinding mechanism 5, the grinding mechanism 5 is connected to a graphitization mechanism 7 through a conveying pipe 6 and a conveying pump 60, and the graphitization mechanism 7 is connected to a sieving and demagnetizing mechanism;

concretely, petroleum coke through screening preliminary treatment becomes irregular cubic, utilize rubbing crusher to smash at first petroleum coke, combine grinding roller 21 to carry out further grinding refining treatment again, the petroleum coke granule after smashing the grinding falls into agitator 3, stir the mixture that mixes formation silt state with the liquid pitch of leading-in agitator 3, because pitch can solidify the sclerosis at normal atmospheric temperature state, the periphery of agitator 3 sets up electromagnetic heating device, guarantee the in-process pitch of stirring and the reliable mixture of petroleum coke, the mixture after the stirring is accomplished is sent into granulation mechanism 4 and is carried out the granulation, the dispersion forms the granular solid that the specification is the same, send into in the grinding mechanism 5 in step and grind and obtain powdered particle, combine conveyer pipe 6 and delivery pump 60 to send into among the graphitization processing mechanism 7 and heat graphitization processing, at last cooling screening and demagnetization and obtain negative pole material graphite product.

The preparation process comprises the following steps:

s1, carrying out screening pretreatment, namely feeding petroleum coke into a screening barrel 100, starting a rotating motor 103 connected with the screening barrel 100 to drive the screening barrel 100 to rotate, so that the petroleum coke in the screening barrel 100 is subjected to rolling screening, dust and other impurity particles in the petroleum coke are separated, and the screened petroleum coke is released into a crushing mechanism;

s2, mixing materials, namely after petroleum coke enters a crushing mechanism to be crushed, enabling the petroleum coke to fall into a stirring barrel 3 in the mixing mechanism, combining an asphalt pipe 30 arranged on the stirring barrel 3, guiding heated asphalt which is in a liquid state into the stirring barrel 3, stirring and mixing the petroleum coke crushed materials and the asphalt in the stirring barrel 3 to form a sludge-shaped mixture, and sending the mixture into a granulating mechanism 4 after stirring;

s3, granulating, namely dispersing the petroleum coke and asphalt mixture into granular solids with the same specification through a granulating mechanism 4, then sending the granular solids into a grinding mechanism 5 to grind and grind the granular solids to obtain powder, sending the powder into a graphitization treatment mechanism 7 along a conveying pipe 6, keeping the temperature in the graphitization treatment mechanism 7 at 3000-3400 ℃, and heating for 24-72 hours;

Further, as shown in fig. 3 to fig. 6, the classifying cylinder 100 is further provided with a feeding and discharging assembly, the feeding and discharging assembly includes a feeding groove 1105 arranged on the side disc 102, a feeding plate 1102 is arranged outside the feeding groove 1105, a guide groove 1106 is arranged on the side disc 102, the feeding plate 1102 is slidably mounted through the guide groove 1106, the guide groove 1106 is arc-shaped, and a circle center of the guide groove 1106 coincides with a rotation center of the side disc 102.

Specifically, in order to facilitate feeding petroleum coke into the sieving cylinder 100, the side disc 102 is provided with a feed chute 1105, the feed chute 1105 is provided with a feed plate 1102 which is installed in a sliding manner, the feed plate 1102 is opened to feed the petroleum coke, and the feed upper feed plate 1102 is completed.

Further, as shown in fig. 5, the feeding and discharging assembly further includes a discharging chute 1000 disposed on the screening drum 100, an arc-shaped mounting groove 1101 is disposed on the side disc 102, a sealing arc-shaped plate 110 is slidably mounted between the arc-shaped mounting grooves 1101, the inner side of the sealing arc-shaped plate 110 is tangent to the connecting rod 101, a mounting post 1108 is disposed at the end of the sealing arc-shaped plate 110, and the sealing arc-shaped plate 110 is slidably mounted between the mounting post 1108 and the arc-shaped mounting groove 1101.

Specifically, petroleum coke accomplishes screening preliminary treatment in screening section of thick bamboo 100 after, for the convenience of the ejection of compact, sets up blown down tank 1000 on screening section of thick bamboo 100, sets up simultaneously between side disc 102 and seals arc 110 and seal blown down tank 1000, and when screening petroleum coke, seal arc 110 and block up blown down tank 1000, can open after the screening is accomplished and seal arc 110 and accomplish the ejection of compact operation of petroleum coke.

Further, as shown in fig. 5, the feeding and discharging assembly further comprises a driving module, a sealing spring is arranged in the guide groove 1106, a top tightening spring 1107 is arranged in the arc-shaped mounting groove 1101, a sleeving column 1109 is arranged on a mounting column 1108, close to one side of the top tightening spring 1107, of the sealing arc-shaped plate 110, the sleeving column 1109 is matched with the top tightening spring 1107, an extension column 1110 is arranged on one side, far away from the top tightening spring 1107, of the sealing arc-shaped plate 110, a linkage frame 1103 is sleeved on a rotation axis of the sieving cylinder 100, the linkage frame 1103 is in contact with the extension column 1110, a driving frame 1104 is arranged on the side disc 102, the driving frame 1104 is arranged in an arc shape, and two ends of the driving frame 1104 are respectively in contact with edges of the linkage frame 1103 and the feeding plate 1102.

Specifically, in order to simplify the business turn over material operation of petroleum coke, set up top tight spring 1107 to arc mounting groove 1101, carry out the top tight installation to closed arc 110 for closed arc 110 seals blown down tank 1000 position all the time when not receiving external force, sets up closed spring in the guide way 1106 of feed plate 1102 installation simultaneously, makes feed plate 1102 cover on feed groove 1105 when not receiving external force, avoids screening in-process petroleum coke to spill. When feeding, the driving frame 1104 in the driving module rotates, so that the driving frame 1104 rotates towards one side of the feeding plate 1102 to push the feeding plate 1102 to open the feeding slot 1105 for feeding, and after the feeding is completed, the feeding plate 1102 resets, and the feeding plate 1102 is pushed by the closing spring to close the feeding slot 1105 again; during the ejection of compact, the driving frame 1104 rotates to one side of link 1103, and it is rotatory around the centre of rotation to promote link 1103, promotes the closed arc 110 who is connected with extension post 1110 and opens the stock chest position, carries out the ejection of compact, resets after the ejection of compact, and closed arc 110 seals discharge chute 1000 again under the effect of top tight spring 1107.

Further, as shown in fig. 8, the pulverizing cones 22 are uniformly arranged on the pulverizing rollers 20, the pulverizing rollers 20 are driven by gears, and the symmetrically arranged grinding rollers 21 are respectively in belt transmission with the pulverizing rollers 20 on the same side.

Specifically, the specific structure of gear transmission and belt transmission is not shown in fig. 8, the grinding rollers 20 are in gear transmission, and the number of power elements can be reduced by the belt transmission between the grinding roller 21 and the grinding roller 20 on the same side, so that the structure is simplified.

Further, as shown in fig. 9, the granulation mechanism 4 includes a receiving hopper 40, a blanking roller 41 is provided in the receiving hopper 40, the blanking roller 41 is symmetrically disposed, a granulation belt is provided below the blanking roller 41, a granulation groove 42 is uniformly provided on the granulation belt, a nip roller 43 is provided on the upper side of the granulation belt, a supporting roller 44 is correspondingly provided on the other side of the granulation belt on the nip roller 43, the granulation belt is triangular, a low temperature box 45 is provided on the horizontal section of the granulation belt, and a vibrator 46 is provided on the inclined section of the granulation belt in a matching manner.

Specifically, a receiving hopper 40 is internally provided with a blanking roller 41, the two blanking rollers 41 extrude and blank the mixed material, so that the mixture moves downwards to a granulation belt in a flat shape, and then is matched with a material pressing roller 43 to press the mixture to the granulation tank 42, a low-temperature box 45 is arranged to rapidly reduce the temperature on the granulation belt along with the movement of the granulation belt, so that the mixture is rapidly solidified and hardened, and a vibrator 46 matched with an inclined section separates the granular mixture from the granulation tank 42, thereby completing granulation.

Further, as shown in fig. 10, the screening and demagnetizing mechanism includes a vibrating screen 70 disposed between the graphitization treatment mechanism 7 and the demagnetizing cylinder 8, the bottom of the demagnetizing cylinder 8 is provided with a vibrating motor 85, the vibrating motor 85 is connected with a vibrating rod 86, the end of the vibrating rod 86 is installed in contact with the vibrating screen 70, the vibrating rod 86 is provided with a discharging disc 80, an electromagnet is disposed in the discharging disc 80, the lower side of the demagnetizing cylinder 8 is provided with an inclined material guide plate 84, and the demagnetizing cylinder 8 is provided with a discharging pipe 88 at the lowest position of the material guide plate 84.

Further, the blanking disks 80 are arranged in a conical shape, the spiral grooves 81 are formed in the upper surfaces of the blanking disks 80, two groups of the blanking disks 80 are arranged, a material guide hopper 82 which is concave downwards is arranged between the two groups of the blanking disks 80, a material guide hole 83 is formed in the middle of the material guide hopper 82, and the edge of the material guide hopper 82 is fixedly connected with the demagnetizing cylinder 8.

Specifically, for the convenience of demagnetization and screening after graphitization, through setting up vibrating motor 85, vibrating rod 86 drives vibrating screen 70 and vibrates the unloading, and graphite falls on conical unloading disc 80 simultaneously, and graphite powder glides along the upper surface of unloading disc 80, and the cooperation electro-magnet accomplishes the demagnetization operation, sets up the gliding speed that spiral groove 81 can reduce graphite on unloading disc 80, promotes the demagnetization effect.

The working principle of the embodiment of the invention is as follows:

as shown in fig. 1 to 10, the sieving barrel 100 is translated to the upper side of the cleaning belt 1010 by the shifting assembly, the feeding plate 1102 is opened by the driving module, petroleum coke is conveyed into the sieving barrel 100 through the feeding slot 1105, the feeding plate 1102 is closed after the feeding is completed, the rotating motor 103 is started to drive the sieving barrel 100 to rotate, the petroleum coke is sieved and pretreated, the sieved dust and impurities are cleaned by the cleaning belt 1010, the sieving barrel 100 is conveyed to the upper side of the crushing mechanism by the shifting assembly after the sieving is completed, the closed arc-shaped plate 110 is opened, the petroleum coke falls into the crushing mechanism, the crushing mechanism is started to crush and grind the petroleum coke, the crushed and ground petroleum coke particles are conveyed into the stirring barrel 3 to be mixed with asphalt to form a mixture, and then the mixture is sent to a granulating mechanism 4, the mixture is extruded and fed by combining two feeding rollers 41, so that the mixture is flatly moved down onto a granulating belt, then the mixture is pressed into a granulating tank 42 by matching with a pressure roller 43, the temperature on the granulating belt is rapidly reduced by a low-temperature box 45 along with the movement of the granulating belt, so that the mixture is rapidly solidified and hardened, the granular mixture is separated from the granulating tank 42 by matching with a vibrator 46 of an inclined section, a granular mixture with the same specification is obtained, the granular mixture is sent to a grinding mechanism 5 to be ground to obtain powder, then the powder is sent to a graphitization processing mechanism 7 to be graphitized at high temperature, and then the graphite product is screened and demagnetized, so that the negative electrode material graphite product is obtained.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. The preparation process of the negative electrode material is characterized in that a preparation device adopted by the preparation process comprises a pretreatment mechanism (1), a crushing mechanism, a mixing mechanism, a granulating mechanism (4), a grinding mechanism (5), a graphitizing treatment mechanism (7) and a screening and demagnetizing mechanism;

the pretreatment mechanism (1) comprises a screening barrel (100), a connecting rod (101) is uniformly arranged on the outer side of the screening barrel (100), side discs (102) are arranged at two ends of the screening barrel (100), one side of the side discs (102) is connected with a rotating motor (103), the pretreatment mechanism further comprises a shifting assembly, the shifting assembly comprises a horizontal guide rail frame (105), the horizontal guide rail frame (105) is connected with a support (1012), the horizontal guide rail frame (105) is arranged at two ends of the screening barrel (100), the screening barrel (100) and the horizontal guide rail frame (105) are slidably mounted, a movable frame (104) is slidably mounted on the horizontal guide rail frame (105), the movable frame (104) is fixedly mounted between one end of the movable frame (104) and the rotating motor (103), a traveling motor (109) is arranged on the horizontal guide rail frame (105), the traveling motor (109) is connected with an output shaft (107), a rack (106) is arranged on the horizontal guide rail frame (105), a position of the output shaft (107) corresponding to the rack (106) is provided with a matching gear (108), a gear (108) and a belt clearing roller (106) meshed with a belt (1010), a belt clearing roller (1010) is arranged on the belt (1010), the belt roller and the bracket (1012) are rotatably arranged, and a guide plate (1011) is arranged above the cleaning belt (1010);

the grinding mechanism is arranged under one end of a horizontal guide rail frame (105), the grinding mechanism comprises a grinding box (2), grinding rollers (20) are arranged in the grinding box (2), the grinding rollers (20) are symmetrically arranged, grinding rollers (21) are arranged on the lower side of the grinding rollers (20), the grinding rollers (21) are symmetrically arranged, the bottom of the grinding box (2) is connected with a mixing mechanism, the mixing mechanism comprises a stirring barrel (3), an asphalt pipe (30) is further connected onto the stirring barrel (3), the bottom of the stirring barrel (3) is connected with a granulating mechanism (4), the granulating mechanism (4) is connected with a grinding mechanism (5), the grinding mechanism (5) is connected with a graphitization processing mechanism (7) through a conveying pipe (6) and a conveying pump (60), and the graphitization processing mechanism (7) is connected with a sieving and demagnetizing mechanism;

the preparation process comprises the following steps:

s1, carrying out screening pretreatment, namely conveying petroleum coke into a screening barrel (100), starting a rotating motor (103) connected with the screening barrel (100) to drive the screening barrel (100) to rotate, so that the petroleum coke in the screening barrel (100) is subjected to rolling screening, dust and other impurity particles in the petroleum coke are separated, and the screened petroleum coke is released into a crushing mechanism;

s2, mixing materials, namely, enabling petroleum coke to enter a crushing mechanism to be crushed and then fall into a stirring barrel (3) of the mixing mechanism, combining an asphalt pipe (30) arranged on the stirring barrel (3), and guiding heated liquid asphalt into the stirring barrel (3) so that the petroleum coke crushed materials and the asphalt are stirred and mixed in the stirring barrel (3) to form a sludge-shaped mixture, and sending the mixture into a granulating mechanism (4) after stirring;

s3, granulating, namely dispersing the petroleum coke and asphalt mixture into granular solids with the same specification through a granulating mechanism (4), then sending the granular solids into a grinding mechanism (5) to grind and grind the granular solids to obtain powder, sending the powder into a graphitization treatment mechanism (7) along a conveying pipe (6), keeping the temperature in the graphitization treatment mechanism (7) between 3000 ℃ and 3400 ℃, and heating for 24 hours to 72 hours;

2. The preparation process of the negative electrode material, according to claim 1, characterized in that the screening drum (100) is further provided with a feeding and discharging assembly, the feeding and discharging assembly comprises a feeding groove (1105) arranged on the side disc (102), a feeding plate (1102) is arranged outside the feeding groove (1105), a guide groove (1106) is arranged on the side disc (102), the feeding plate (1102) is slidably mounted through the guide groove (1106), the guide groove (1106) is arc-shaped, and the circle center of the guide groove (1106) coincides with the rotation center of the side disc (102).

3. The preparation process of the negative electrode material according to claim 2, wherein the feeding and discharging assembly further comprises a discharging chute (1000) arranged on the screening barrel (100), the side disc (102) is provided with an arc-shaped mounting groove (1101), a sealing arc-shaped plate (110) is slidably mounted between the arc-shaped mounting grooves (1101), the inner side of the sealing arc-shaped plate (110) is tangent to the connecting rod (101), the end of the sealing arc-shaped plate (110) is provided with a mounting column (1108), and the sealing arc-shaped plate (110) is slidably mounted between the mounting column (1108) and the arc-shaped mounting groove (1101).

4. The preparation process of the negative electrode material as claimed in claim 3, wherein the feeding and discharging assembly further comprises a driving module, a closed spring is arranged in the guide groove (1106), a tightening spring (1107) is arranged in the arc-shaped mounting groove (1101), one side, away from the tightening spring (1107), of the closed arc-shaped plate (110) is provided with an extending column (1110), a linkage frame (1103) is sleeved on a rotation axis of the sieving cylinder (100), the linkage frame (1103) and the extending column (1110) are installed in a contact manner, a driving frame (1104) is installed on the side disc (102), the driving frame (1104) is arranged in an arc manner, and two ends of the driving frame (1104) are installed in a contact manner with edges of the linkage frame (1103) and the feeding plate (1102) respectively.

5. The preparation process of the anode material according to claim 1, wherein the grinding rollers (20) are uniformly provided with grinding cones (22), the grinding rollers (20) are driven by gears, and the symmetrically arranged grinding rollers (21) are respectively in belt transmission with the grinding rollers (20) on the same side.

6. The preparation process of the negative electrode material according to claim 1, wherein the granulation mechanism (4) comprises a receiving hopper (40), a blanking roller (41) is arranged in the receiving hopper (40), the blanking roller (41) is symmetrically arranged, a granulation belt is arranged below the blanking roller (41), granulation grooves (42) are uniformly arranged on the granulation belt, a nip roller (43) is arranged on the upper side of the granulation belt, the nip roller (43) is correspondingly provided with a support roller (44) on the other side of the granulation belt, the granulation belt is arranged in a triangular shape, a low-temperature box (45) is arranged on the horizontal section of the granulation belt, and a vibrator (46) is arranged on the inclined section of the granulation belt in a matching manner.

7. The negative electrode material preparation process according to claim 1, wherein the screening and demagnetization mechanism comprises a vibrating screen (70) arranged between the graphitization treatment mechanism (7) and the demagnetization cylinder (8), the bottom of the demagnetization cylinder (8) is provided with a vibrating motor (85), the vibrating motor (85) is connected with a vibrating rod (86), the tail end of the vibrating rod (86) is installed in contact with the vibrating screen (70), a blanking disc (80) is installed on the vibrating rod (86), an electromagnet is arranged in the blanking disc (80), an inclined material guide plate (84) is arranged on the lower side of the demagnetization cylinder (8), and a discharge pipe (88) is arranged at the lowest position of the material guide plate (84) of the demagnetization cylinder (8).

8. The preparation process of the negative electrode material as claimed in claim 7, wherein the blanking disks (80) are arranged in a conical shape, the upper surfaces of the blanking disks (80) are provided with spiral grooves (81), two groups of the blanking disks (80) are arranged, a guide hopper (82) which is concave downwards is arranged between the two groups of the blanking disks (80), a guide hole (83) is arranged in the middle of the guide hopper (82), and the edge of the guide hopper (82) is fixedly connected with the demagnetizing cylinder (8).