CN109556397B - Roller kiln for producing lithium ion battery anode material and production process thereof - Google Patents
Roller kiln for producing lithium ion battery anode material and production process thereof Download PDFInfo
- Publication number
- CN109556397B CN109556397B CN201811526076.2A CN201811526076A CN109556397B CN 109556397 B CN109556397 B CN 109556397B CN 201811526076 A CN201811526076 A CN 201811526076A CN 109556397 B CN109556397 B CN 109556397B
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- roller
- sagger
- gear
- kiln
- lithium ion
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 29
- 239000010405 anode material Substances 0.000 title claims abstract description 23
- 230000001174 ascending effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007774 positive electrode material Substances 0.000 claims 4
- 238000005245 sintering Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000001788 irregular Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000010406 cathode material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3077—Arrangements for treating electronic components, e.g. semiconductors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses a roller kiln for producing a lithium ion battery anode material and a production process thereof, comprising a furnace body and a roller conveying system. The inlet and outlet of furnace are respectively provided with a section of roller way which is kept horizontal with the horizontal plane, the middle roller way is gradually inclined, and the roller way is circularly arranged with ascending gradually inclined and descending gradually inclined when gradually inclined. The adoption of the gradually-inclined roller way can reduce irregular inclination of the sagger during transportation in the roller kiln, the sagger is offset towards the driving end of the roller when the roller way rises and gradually inclines, and the sagger is offset towards the driven end of the roller when the roller way falls and gradually inclines, so that the limit mechanism is not required to be additionally arranged for limiting, the phenomenon that the sagger is blocked due to overlarge deviation in the transportation process can be effectively prevented, the normal discharging of the sagger can be effectively ensured during long-distance transportation, and the sintering speed of the production process can be improved, the energy consumption can be reduced and the high-quality lithium ion battery anode material can be obtained by adopting the production process of the roller kiln.
Description
Technical Field
The invention relates to the field of firing, in particular to a roller kiln for producing a lithium ion battery anode material and a production process thereof.
Background
One of the key links in the production of lithium ion battery cathode materials is sintering. At present, roller kilns are mostly used as sintering tools, and the roller kilns are widely applied due to the fact that the sintering temperature is uniform, the product quality is stable, and the uniformity is excellent. However, the length of the roller kilns commonly used in the world is generally not more than 50 meters, so that the feeding quantity of the roller kilns is limited, and the sintering speed is low and the energy consumption is high. If a longer roller kiln is adopted, the sintering speed can be increased, the energy consumption can be reduced, but the situation that the sagger is excessively deviated in the transportation process and is blocked in the kiln body can be probably caused, and the material cannot be normally transported and discharged is probably caused, because the acting force of each roller rod of the roller kiln transportation system is different from that of the bottom of the sagger, the sagger is irregularly deviated, meanwhile, the temperature in the roller kiln is higher, the limiting mechanism is difficult to install for limiting, the sagger is easy to block materials in the long-distance transportation process in the roller kiln, once the material blocking production rate is reduced, and the production energy consumption is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a roller kiln for producing lithium ion battery anode materials, which has the advantages of no material clamping of a sagger, high production rate and low production energy consumption, and a production process thereof.
The technical scheme adopted for solving the technical problems is as follows:
The roller kiln for producing the lithium ion battery anode material comprises a furnace body and a roller conveying system, wherein the roller conveying system is arranged inside the furnace body and comprises a roller way and a power system, the roller way is formed by horizontally arranging a plurality of roller bars in the vertical direction, the driving end of each roller bar is connected with the power system, the roller bars are driven by the power system to rotate, a section of roller way is kept horizontal with the horizontal plane at the inlet and the outlet of the furnace body, the roller way in the middle is gradually inclined, and the roller way is gradually inclined in the ascending and gradually inclined manner and the descending gradually inclined manner are circularly arranged during the gradual inclination.
Preferably, the gradual change inclination is that the driving end of the roller rod is at the same horizontal height, the driven end of the roller rod is higher or lower than the driven end, an included angle is formed between the roller rod and the horizontal plane, the included angle between the roller rod and the horizontal plane is not less than zero degrees and not more than ten degrees, and the maximum included angle between the roller rod and the horizontal plane is five to ten degrees.
Preferably, the included angle between the next roller and the horizontal plane is larger than the included angle between the previous roller and the horizontal plane when the ascending gradient is inclined, and the descending gradient is that the included angle between the next roller and the horizontal plane is smaller than the included angle between the previous roller and the horizontal plane, and the included angle between two adjacent rollers in the vertical direction is not smaller than five zero degrees and not larger than one degree.
Preferably, the power system comprises a driving mechanism, a chain wheel and a transmission mechanism, wherein the driving mechanism is connected with the chain wheel through the chain, and the chain wheel is connected with the driving end of the roller rod through the transmission mechanism.
Preferably, the transmission mechanism comprises a gear shaft, an upper gear and a lower gear which are positioned at two ends of the gear shaft, a sprocket gear is arranged on the sprocket, a roller gear is arranged at the driving end of the roller, the sprocket gear is connected with the lower gear, and the upper gear is connected with the roller gear.
The production process of the lithium ion battery anode material of the roller kiln comprises the following steps:
S1: starting the roller kiln;
s2: uniformly mixing the production raw materials of the anode material of the lithium ion battery, and placing the mixture in a sagger;
s3: placing the sagger in a roller way conveying system, conveying the sagger into a heating area of a roller way kiln, heating to 800-1000 ℃ at a speed of 1-3 ℃/min, and keeping for 5-10h;
s4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 10 to 20 hours at 800 to 1000 ℃;
S5: the sagger enters a cooling area from a constant temperature area, is cooled to 25-100 ℃ and is kept for 5-10h;
S6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
The beneficial effects are that:
The inlet and outlet of furnace are respectively provided with a section of roller way which is kept horizontal with the horizontal plane, the middle roller way is gradually inclined, and the roller way is circularly arranged with ascending gradually inclined and descending gradually inclined when gradually inclined. The adoption of the gradually-inclined roller way can reduce irregular inclination of the sagger during transportation in the roller kiln, the sagger is offset towards the driving end of the roller when the roller way rises and gradually inclines, and the sagger is offset towards the driven end of the roller when the roller way falls and gradually inclines, so that the limit mechanism is not required to be additionally arranged for limiting, the phenomenon that the sagger is blocked due to overlarge deviation in the transportation process can be effectively prevented, the normal discharging of the sagger can be effectively ensured during long-distance transportation, and the sintering speed of the production process can be improved, the energy consumption can be reduced and the high-quality lithium ion battery anode material can be obtained by adopting the production process of the roller kiln.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the roller conveyor system of the present invention;
FIG. 3 is a schematic diagram of the transmission mechanism between the chain wheel and the roller rod.
Reference numerals in the drawings: the device comprises a 1-furnace body, a 2-roller way conveying system, a 3-roller way, a 5-roller bar, a 51-roller bar gear, a 6-driving structure, a 7-chain, an 8-sprocket, a 81-sprocket gear, a 9-transmission mechanism, a 91-gear shaft, a 92-upper gear and a 93-lower gear.
Detailed Description
Referring to fig. 1 and 2, a roller kiln for producing lithium ion battery anode materials comprises a furnace body 1 and a roller conveying system 2, wherein the roller conveying system 2 is arranged in the furnace body 1, the roller conveying system 2 comprises a roller 3 and a power system, the roller 3 is formed by horizontally arranging a plurality of rollers 5 in the vertical direction, the driving end of each roller 5 is connected with the power system, the rollers 5 are driven by the power system to rotate, a section of roller 3 is kept horizontal with a horizontal plane at an inlet and an outlet of the furnace body 1, the roller 3 in the middle is gradually inclined, and the roller 3 is in ascending gradual inclination and descending gradual inclination cyclic arrangement during gradual inclination.
The inlet and outlet of the furnace body 1 are respectively provided with a section of roller way 3 which is kept horizontal with the horizontal plane, the middle roller way 3 is gradually inclined, and the roller way 3 is circularly arranged with ascending gradual inclination and descending gradual inclination during gradual inclination. By adopting the roller way 3 with gradual inclination, irregular inclination of the sagger during transportation in the roller kiln can be reduced, when the roller way 3 ascends and gradually inclines, the sagger deviates to the driving end of the roller rod 5, when the roller way 3 descends and gradually inclines, the sagger deviates to the driven end of the roller rod 5, and therefore, the limit mechanism is not required to be additionally arranged for limiting, the phenomenon of clamping caused by overlarge deviation in the transportation process of the sagger can be effectively prevented, the long-distance transportation of the sagger can be effectively ensured, the production rate is improved, and the production cost is reduced.
The gradual change inclination is that the driving end of the roller 5 is at the same horizontal height, the driven end of the roller 5 is higher or lower than the driven end, an included angle is formed between the driven end and the horizontal surface, the included angle formed between the roller 5 and the horizontal surface can be adjusted by adjusting the height of the driven end, the included angle between the roller 5 and the horizontal surface is not less than zero degrees and not more than ten degrees, the maximum included angle between the roller 5 and the horizontal surface is five to ten degrees, and when the ascending inclination and the descending inclination are limited, the angle between the roller 5 and the horizontal surface is avoided, the sagger is prevented from excessively inclining on the roller table 3, and the sagger can slide on the inclined roller table 3.
The included angle between the next roller 5 and the horizontal plane is larger than the included angle between the previous roller 5 and the horizontal plane when the ascending gradient is inclined, the descending gradient is that the included angle between the next roller 5 and the horizontal plane is smaller than the included angle between the previous roller 5 and the horizontal plane, and the included angle between two adjacent rollers 5 in the vertical direction is not smaller than five zero degrees and not larger than one degree. The roller way 3 is gradually inclined when inclined, so that the sagger can be transported on the roller way 3 normally.
As shown in fig. 2, the power system comprises a driving mechanism 6, a chain 7, a chain wheel 8 and a transmission mechanism 9, wherein the driving mechanism 6 is connected with the chain wheel 8 through the chain 7, and the chain wheel 8 is connected with the driving end of the roller 5 through the transmission mechanism 9. The driving mechanism 6 provides power for the power system, the chain 7 drives the chain wheel 8 to rotate, and the chain wheel 8 drives the roller 5 to rotate through the transmission mechanism 9.
As shown in fig. 3, the transmission mechanism 9 includes a gear shaft 91, an upper gear 92 and a lower gear 93 located at two ends of the gear shaft 91, a sprocket gear 81 is disposed on the sprocket 8, a roller gear 51 is disposed at a driving end of the roller 5, the sprocket gear 81 is connected with the lower gear 93, the upper gear 92 is connected with the roller gear 51, the sprocket gear 81 is meshed with the lower gear 93, when the sprocket 8 rotates, the lower gear 93 is driven to rotate by the sprocket gear 81, when the lower gear 93 rotates, the upper gear 92 located on the same gear shaft 91 rotates, the upper gear 92 is meshed with the roller gear 51 to drive the roller 5 to rotate, so as to realize the conveying of the sagger, and meanwhile, by setting the meshing surfaces of the upper gear 92 and the roller gear 51, an included angle between the gear shaft 91 and the roller 5 is controlled, so that an included angle between the roller 5 and a horizontal plane is controlled.
The production process of the lithium ion battery anode material of the roller kiln comprises the following steps:
S1: starting the roller kiln;
s2: uniformly mixing the production raw materials of the anode material of the lithium ion battery, and placing the mixture in a sagger;
s3: placing the sagger in a roller way conveying system 2, conveying the sagger into a heating area of a roller way kiln, heating to 800-1000 ℃ at a speed of 1-3 ℃/min, and keeping for 5-10h;
s4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 10 to 20 hours at 800 to 1000 ℃;
S5: the sagger enters a cooling area from a constant temperature area, is cooled to 25-100 ℃ and is kept for 5-10h;
S6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
The production process can improve the sintering speed of the lithium ion battery anode material in the production process, reduce the energy consumption and obtain the high-quality lithium ion battery anode material.
The roller kilns used in the present invention have a length of greater than 50 meters, and three embodiments of roller kilns of different lengths and their production steps are provided below.
The roller kiln is divided into a heating zone, a constant temperature zone and a cooling zone. The length of each warm zone roller way 3 is set according to the needs.
Example 1:
the roller kiln comprises a furnace body 1 and a roller conveying system 2, and the length of the roller kiln is 100 meters.
The roller way conveying system 2 comprises a roller way 3 and a power system. The roller way 3 is formed by horizontally arranging a plurality of roller bars 5 in the vertical direction, wherein the roller bars 5 and the horizontal plane have gradient, the included angle between the roller bars 5 and the horizontal plane is not more than 10 degrees, and the included angle between two adjacent roller bars 5 is not more than 1 degree. Starting from the inlet of the furnace body 1, the roller way 3 keeps a horizontal level of 5 meters; then, the roller way rises and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 5 degrees; then, the roller way descends and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 5 degrees; the roller way 3 circulates in this way until the roller way is 5 meters away from the outlet of the furnace body 1; the roller way 3 keeps a horizontal level of 5 meters to the outlet of the furnace body 1.
The gradual change inclination mode of the roller way 3 is as follows: the driving ends of the roller bars 5 are at the same horizontal height, the driven ends of the roller bars 5 are higher or lower than the driven ends, an included angle is formed between the driven ends and the horizontal plane, the included angle formed between the roller bars 5 and the horizontal plane can be adjusted by adjusting the height of the driven ends, and the included angle between two adjacent roller bars 5 in the vertical direction is 0.5 degree.
The power system comprises a driving mechanism 6, chains 7, chain wheels 8, and a transmission mechanism 9 between each chain wheel 8 and each roller rod 5. The transmission mechanism 9 between each chain wheel 8 and each roller 5 comprises a chain wheel gear 81 coaxial with the chain wheel 8, a gear shaft with two ends respectively provided with a lower gear 93 and an upper gear 92, and a roller gear 51 coaxial with the roller 5. The sprocket gear 81 is meshed with the lower gear 93, and the upper gear 92 is meshed with the roller gear 51. By providing the engagement surfaces of the upper gear 92 and the roller gear 51, the angle between the gear shaft and the roller 5 is controlled, thereby controlling the inclination of the roller 5.
The production process specifically comprises the following steps:
Step 1: starting the roller kiln;
Step 2: uniformly mixing the production raw materials of the ternary cathode material, and placing the mixed materials in a sagger;
Step 3: placing the sagger in a roller way conveying system, conveying the sagger into a heating area of a roller way kiln, heating to 800 ℃ at a speed of 1 ℃/min, and keeping for 5 hours;
step 4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 10 hours at 800 ℃;
Step 5: the sagger enters a cooling area from a constant temperature area, is cooled to 25 ℃ and is kept for 5 hours;
Step 6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
Example 2:
the roller kiln comprises a furnace body 1 and a roller conveying system 2, and the length of the roller kiln is 150 meters.
The roller way conveying system 2 comprises a roller way 3 and a power system. The roller way 3 is formed by horizontally arranging a plurality of roller bars 5 in the vertical direction, wherein the roller bars 5 and the horizontal plane have gradient, the included angle between the roller bars 5 and the horizontal plane is not more than 10 degrees, and the included angle between two adjacent roller bars 5 is not more than 1 degree. Starting from the inlet of the furnace body 1, the roller way 3 keeps 7.5 meters horizontally; then, the roller way 3 ascends and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 7.5 degrees; then, the roller way 3 descends and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 7.5 degrees; the roller way 3 circulates in this way until 7.5 meters from the outlet of the furnace body 1; the roller way 3 keeps 7.5 meters horizontally to the outlet of the furnace body 1.
The gradual change inclination mode of the roller way 3 is as follows: the driving ends of the roller bars 5 are at the same horizontal height, the driven ends of the roller bars 5 are higher or lower than the driven ends, an included angle is formed between the driven ends and the horizontal plane, the included angle formed between the roller bars 5 and the horizontal plane can be adjusted by adjusting the height of the driven ends, and the included angle between two adjacent roller bars 5 in the vertical direction is 0.75 degree.
The power system comprises a driving mechanism 6, chains 7, chain wheels 8, and a transmission mechanism 9 between each chain wheel 8 and each roller rod 5. The transmission mechanism 9 between each chain wheel 8 and each roller 5 comprises a chain wheel gear 81 coaxial with the chain wheel 8, a gear shaft with two ends respectively provided with a lower gear 93 and an upper gear 92, and a roller gear 51 coaxial with the roller 5. The sprocket gear 81 is meshed with the lower gear 93, and the upper gear 92 is meshed with the roller gear 51. By providing the engagement surfaces of the upper gear 92 and the roller gear 51, the angle between the gear shaft and the roller 5 is controlled, thereby controlling the inclination of the roller 5.
The production process specifically comprises the following steps:
Step 1: starting the roller kiln;
Step 2: uniformly mixing the production raw materials of the ternary cathode material, and placing the mixed materials in a sagger;
step 3: placing the sagger in a roller way conveying system, conveying the sagger into a heating area of a roller way kiln, heating to 900 ℃ at a speed of 2 ℃/min, and keeping for 7.5 hours;
Step 4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 15 hours at 900 ℃;
Step 5: the sagger enters a cooling area from a constant temperature area, is cooled to 50 ℃ and is kept for 7.5h;
Step 6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
Example 3:
The roller kiln comprises a furnace body 1 and a roller conveying system 2, and the length of the roller kiln is 200 meters.
The roller way conveying system 2 comprises a roller way 3 and a power system. The roller way 3 is formed by horizontally arranging a plurality of roller bars 5 in the vertical direction, wherein the roller bars 5 and the horizontal plane have gradient, the included angle between the roller bars 5 and the horizontal plane is not more than 10 degrees, and the included angle between two adjacent roller bars 5 is not more than 1 degree. The roller way 3 is kept level for 10 meters from the inlet of the furnace body 1; then, the roller way 3 ascends and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 10 degrees; then, the roller way 3 descends and gradually inclines until the included angle between the roller rod 5 and the horizontal plane is 10 degrees; the roller way 3 circulates in this way until 10 meters from the outlet of the furnace body 1; the roller way 3 keeps 10 meters horizontally to the outlet of the furnace body 1.
The gradual change inclination mode of the roller way 3 is as follows: the driving ends of the rollers 5 are at the same horizontal height, the driven ends of the rollers 5 are higher or lower than the driven ends, an included angle is formed between the driven ends and the horizontal plane, the included angle formed between the rollers 5 and the horizontal plane can be adjusted by adjusting the height of the driven ends, and the included angle between two adjacent rollers 5 in the vertical direction is 1 degree.
The power system comprises a driving mechanism 6, chains 7, chain wheels 8, and a transmission mechanism 9 between each chain wheel 8 and each roller rod 5. The transmission mechanism 9 between each chain wheel 8 and each roller 5 comprises a chain wheel gear 81 coaxial with the chain wheel 8, a gear shaft with two ends respectively provided with a lower gear 93 and an upper gear 92, and a roller gear 51 coaxial with the roller 5. The sprocket gear 81 is meshed with the lower gear 93, and the upper gear 92 is meshed with the roller gear 51. By providing the engagement surfaces of the upper gear 92 and the roller gear 51, the angle between the gear shaft and the roller 5 is controlled, thereby controlling the inclination of the roller 5.
The production process specifically comprises the following steps:
Step 1: starting the roller kiln;
Step 2: uniformly mixing the production raw materials of the ternary cathode material, and placing the mixed materials in a sagger;
Step 3: placing the sagger in a roller way conveying system, conveying the sagger into a heating area of a roller way kiln, heating to 1000 ℃ at a speed of 3 ℃/min, and keeping for 10 hours;
Step 4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 20 hours at 1000 ℃;
step 5: the sagger enters a cooling area from a constant temperature area, is cooled to 100 ℃ and is kept for 10 hours;
Step 6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
The present invention is not limited to the above embodiments, but can be achieved by any similar or identical means.
Claims (6)
1. The utility model provides a roller kiln of production lithium ion battery positive pole material, includes furnace body (1) and roller way conveying system (2), and inside furnace body (1) was arranged in roller way conveying system (2), roller way conveying system (2) include roller way (3) and driving system, and roller way (3) are formed by a plurality of roller bars (5) in the horizontal arrangement of vertical direction, and the driving end and the driving system of roller bar (5) are connected, and roller bar (5) rotate under driving system drives, its characterized in that: a section of roller way (3) is kept horizontal to the horizontal plane at the inlet and the outlet of the furnace body (1), the middle roller way (3) is gradually inclined, and the roller way (3) is circularly arranged in a rising gradual inclination and a descending gradual inclination mode during gradual inclination;
the gradual change inclination is that the driving end of the roller rod (5) is at the same horizontal height, the driven end of the roller rod (5) is higher or lower than the driving end, an included angle is formed between the driven end of the roller rod (5) and the horizontal plane, and the included angle between the roller rod (5) and the horizontal plane is not less than zero degrees and not more than ten degrees;
The included angle between the next roller (5) and the horizontal plane is larger than the included angle between the previous roller (5) and the horizontal plane when the ascending gradual change is inclined, and the descending gradual change is that the included angle between the next roller (5) and the horizontal plane is smaller than the included angle between the previous roller (5) and the horizontal plane.
2. A roller kiln for producing positive electrode material of lithium ion battery according to claim 1, characterized in that: the maximum included angle between the roller (5) and the horizontal plane is five to ten degrees.
3. A roller kiln for producing positive electrode material of lithium ion battery according to claim 2, characterized in that: the included angle between two adjacent rollers (5) in the vertical direction is not smaller than five zero degrees and not larger than one degree.
4. A roller kiln for producing positive electrode material of lithium ion battery according to claim 1, characterized in that: the power system comprises a driving mechanism (6), a chain (7), a chain wheel (8) and a transmission mechanism (9), wherein the driving mechanism (6) is connected with the chain wheel (8) through the chain (7), and the chain wheel (8) is connected with the driving end of the roller rod (5) through the transmission mechanism (9).
5. A roller kiln for producing positive electrode material of lithium ion battery according to claim 4, wherein: the transmission mechanism (9) comprises a gear shaft (91), an upper gear (92) and a lower gear (93) which are positioned at two ends of the gear shaft (91), a sprocket gear (81) is arranged on the sprocket (8), a roller gear (51) is arranged at the driving end of the roller (5), the sprocket gear (81) is connected with the lower gear (93), and the upper gear (92) is connected with the roller gear (51).
6. A process for producing a lithium ion battery anode material by adopting the roller kiln of any one of claims 1 to 5, which is characterized in that: the interior of the roller kiln is divided into a heating zone, a constant temperature zone and a cooling zone, and the production process comprises the following steps:
S1: starting the roller kiln;
s2: uniformly mixing the production raw materials of the anode material of the lithium ion battery, and placing the mixture in a sagger;
S3: placing the sagger in a roller way conveying system (2), conveying the sagger into a heating area of a roller way kiln, heating to 800-1000 ℃ at a speed of 1-3 ℃/min, and keeping for 5-10h;
s4: the sagger enters a constant temperature area from a temperature rising area and is sintered for 10 to 20 hours at 800 to 1000 ℃;
S5: the sagger enters a cooling area from a constant temperature area, is cooled to 25-100 ℃ and is kept for 5-10h;
S6: pouring out powder from the sagger, and obtaining the lithium ion anode material product through crushing, screening, demagnetizing and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526076.2A CN109556397B (en) | 2018-12-13 | 2018-12-13 | Roller kiln for producing lithium ion battery anode material and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526076.2A CN109556397B (en) | 2018-12-13 | 2018-12-13 | Roller kiln for producing lithium ion battery anode material and production process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109556397A CN109556397A (en) | 2019-04-02 |
| CN109556397B true CN109556397B (en) | 2024-05-10 |
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|---|---|---|---|---|
| CN110375545A (en) * | 2019-08-01 | 2019-10-25 | 深圳东忠窑炉有限公司 | A kind of high temperature sintering tunnel kiln |
| CN113686146A (en) * | 2021-08-26 | 2021-11-23 | 江苏润鸿高温窑具有限公司 | Gas sintering lithium battery anode material roller kiln system |
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| CN109556397A (en) | 2019-04-02 |
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