Ring roller grinding device and grinding method thereof

Abstract

The invention discloses a ring roller mill device and a grinding method thereof, and particularly relates to the field of ring roller mills.The ring roller mill device comprises a machine shell, a driving part is arranged at the bottom of the machine shell, a main shaft is rotationally arranged in the machine shell, the driving part is used for driving the main shaft to rotate, a feeding pipe and a discharging pipe are arranged on the machine shell, and the feeding end of the discharging pipe extends into the machine shell; a roller grinding mechanism is arranged in the machine shell and used for rolling and grinding graphite particles. According to the graphite particle grinding device, the distance between the grinding areas is set to be decreased gradually along with height decrease in the vertical direction, so that when graphite particles are ground, overlarge grinding resistance can be avoided, when the graphite particles fall down layer by layer, resistance borne by the graphite particles in the grinding process is reduced, and the grinding quality of the graphite particles is improved. Therefore, the overall flowability of the graphite particles passing through the grinding area is improved, and the grinding efficiency of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ring roller mills, and more specifically, to a ring roller mill device and a grinding method thereof. Background Art

[0002] The common negative electrode material of lithium batteries is mainly graphite. During the graphite processing, because fine graphite powder has better conductivity, the graphite material needs to be ground into powder. Currently, the grinding of graphite is usually carried out by ring roller mill.

[0003] Ring roller mill is a kind of high-efficiency grinding equipment, which is widely used in mining, metallurgy, chemical industry, building materials and other industries. In the main chamber of the ring roller mill, the grinding roller installed on the turntable rotates around the central axis. When feeding, it will fall on the turntable. Under the action of centrifugal force, the material enters the gap between the grinding roller and the grinding ring, and the grinding roller swings outward horizontally, so that the grinding roller presses the grinding ring. Due to the rolling of the grinding roller, the graphite is crushed and ground. The ground powder falls on the throwing plate, so that the powder is thrown out from the throwing plate into the air duct under the action of centrifugal force. Then, under the action of the induced draft fan, the coarse particles are sorted by the powder classifier and then fall back to be ground again, and the fine powder is discharged through the discharge port.

[0004] In current ring roller mills, multiple groups of grinding rollers are usually set from top to bottom for grinding. The spacing between the grinding rollers and the grinding rings from top to bottom in the ring roller mill is the same, and in order to finely control the grinding process and improve the grinding accuracy of the product, the spacing is usually set small, resulting in poor fluidity of the material when it is ground by the grinding rollers and grinding rings, and the material is subjected to large grinding resistance and friction during the process of grinding layer by layer, resulting in low processing efficiency. Summary of the invention

[0005] The present invention provides a ring roller mill device and a grinding method thereof, and aims to solve the problem that: in the existing ring roller mill device, the spacing between the grinding roller and the grinding ring from top to bottom is set small, resulting in poor fluidity of the material when it is ground by the grinding roller and the grinding ring, and the material is subjected to large grinding resistance and friction during the process of grinding layer by layer, resulting in low processing efficiency.

[0006] To achieve the above object, the present invention provides the following technical solution: a ring roller mill device, comprising: a casing, a driving component is arranged at the bottom of the casing, a main shaft is rotatably arranged in the casing, the driving component is used to drive the main shaft to rotate, a feed pipe and a discharge pipe are arranged on the casing, and a feed end of the discharge pipe extends into the casing;

[0007] A roller mill mechanism is arranged in the casing, and the roller mill mechanism is used for rolling and grinding graphite particles. The roller mill mechanism includes a roller mill frame, and the roller mill frame is fixedly arranged on the main shaft. The roller mill frame is provided with a plurality of roller mill cavities in the vertical direction, and the roller mill cavities are provided with a plurality of grinding rollers rotating along the circumferential direction of the roller mill frame. A grinding ring is fixedly arranged in the casing, and a plurality of grinding rollers located on the same horizontal plane roll in the corresponding grinding rings, and the spacing between the grinding rollers and the grinding rings decreases from top to bottom in the vertical direction.

[0008] An air duct is arranged on the inner side of the casing, a powder classifier is fixedly arranged in the casing, the powder classifier is located on the inner side of the port at the feeding end of the discharge pipe, an air inlet is arranged on the outer side of the casing, and the air inlet is connected with the air duct;

[0009] During grinding, graphite particles fall down layer by layer from top to bottom, and between each layer of grinding rollers and grinding rings, the grinding rollers roll in the grinding rings to grind the graphite particles. The graphite particles fall down layer by layer from top to bottom and are rolled and ground for many times. The graphite powder formed after grinding is driven by airflow into the powder classifier for sorting. The qualified graphite powder is discharged through the discharge pipe, and the unqualified graphite powder falls back to the roller mill mechanism for re-grinding.

[0010] In a preferred embodiment, a thrower plate is fixedly provided on the main shaft, and a plurality of scraping mechanisms are provided on the thrower plate. The plurality of scraping mechanisms are arranged in a circular array above the thrower plate. The scraping mechanism includes a rotatably arranged scraper plate, the scraper plate is arranged in an "S" shape, and the scraper plate contacts the upper surface of the thrower plate. The scraping mechanism is used to scrape the agglomerated or lump-shaped graphite powder away from the thrower plate.

[0011] In a preferred embodiment, a vertical shaft is rotatably provided on the throwing plate, the scraper plate is fixedly provided on the vertical shaft, a gear is fixedly sleeved on the vertical shaft, a gear ring is fixedly provided in the casing, the gear is meshed with the gear ring, a plurality of fixed rods are fixedly provided on the gear ring, and the plurality of fixed rods are fixedly provided on the inner wall of the casing.

[0012] In a preferred embodiment, it also includes a plurality of breaking up mechanisms, which are arranged in a circular array below the flinging plate. The breaking up mechanisms include a horizontal axis rotatably arranged on the bottom side of the flinging plate, and a plurality of breaking up rods are fixedly arranged on one end of the horizontal axis away from the flinging plate. The breaking up mechanisms are used to break up the agglomerated or lump-shaped graphite powder clumps scraped off the flinging plate.

[0013] In a preferred embodiment, bevel gears are fixedly disposed at the ends of the horizontal axis and the corresponding vertical axis, and the two bevel gears are meshed with each other.

[0014] In a preferred embodiment, a blanking plate is fixedly installed on the main shaft, the upper surface of the blanking plate is inclined, the roller mill frame is located between the blanking plate and the throwing plate, the blanking plate is located above the throwing plate, and the blanking plate, the roller mill frame and the throwing plate are aligned in the vertical direction.

[0015] In a preferred embodiment, a material guide ring is fixedly provided on the outer edge of the material throwing plate, and the transverse axis is rotatably provided in the material guide ring.

[0016] In a preferred embodiment, a plurality of scrapers are fixedly arranged in the roller grinding chamber, and a plurality of grinding rollers are in contact with corresponding scrapers.

[0017] In a preferred embodiment, it also includes a classifier, a pulse dust collector and a high-pressure centrifugal fan. There are two classifiers. The air inlet of the classifier close to the casing is connected to the discharge pipe of the casing, the discharge port of the classifier close to the casing is connected to the casing, the air outlet of the classifier close to the casing is connected to the air inlet of the classifier close to the pulse dust collector, the air outlet of the classifier close to the pulse dust collector is connected to the air inlet of the pulse dust collector, and the air outlet of the pulse dust collector is connected to the air inlet of the high-pressure centrifugal fan.

[0018] A grinding method of a ring roller grinding device comprises the following steps:

[0019] Step 1: Add graphite particles into the casing from the feed pipe, and the driving component drives the roller mill mechanism to rotate through the main shaft, so that the grinding roller rolls in the grinding ring to roll and grind the graphite particles, and the ground graphite powder falls and falls onto the throwing plate;

[0020] Step 2: During the rotation of the roller mill mechanism, the scraper plate in the scraper mechanism scrapes the agglomerated or lumped graphite powder into the air duct, and when the agglomerated or lumped graphite powder enters the air duct, the breaking mechanism breaks up the agglomerated or lumped graphite powder through the breaking rod and drops it into the air duct;

[0021] Step 3: The high-pressure centrifugal fan allows the air flow to enter the air duct through the air inlet, and drives the graphite powder into the powder classifier for sorting. The qualified graphite powder is discharged through the discharge pipe, and the unqualified graphite powder falls back and is re-ground.

[0022] The beneficial effects of the present invention are:

[0023] The present invention sets the spacing of the grinding areas to decrease with the height in the vertical direction, which helps to avoid excessive grinding resistance when the graphite particles are ground, and reduces the resistance encountered by the graphite particles during the grinding process when the graphite particles fall layer by layer, thereby improving the overall fluidity of the graphite particles when passing through the grinding area and improving the grinding efficiency of the equipment.

[0024] The present invention scrapes the block or lump-shaped graphite powder out of the throwing plate by arranging a scraping mechanism, thereby avoiding the problem that the block or lump-shaped graphite powder adheres to the throwing plate and cannot be thrown into the air duct, and the scattering mechanism can scatter the block or lump-shaped graphite powder while scraping the block or lump-shaped graphite powder into the air duct, thereby avoiding the problem that the block or lump-shaped graphite powder scraped into the air duct has a large gravity and cannot be brought into the powder selector by the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0027] Figure 3 It is a schematic diagram of the front cross-sectional structure of the present invention.

[0028] Figure 4 for Figure 3 Structural diagram of the local structure in .

[0029] Figure 5 It is a structural schematic diagram of the roller grinding mechanism of the present invention.

[0030] Figure 6 for Figure 4 A magnified schematic diagram of the local structure.

[0031] Figure 7 Schematic diagram of the material throwing plate, scraping mechanism and scattering mechanism of the present invention Figure 1 .

[0032] Figure 8 Schematic diagram of the material throwing plate, scraping mechanism and scattering mechanism of the present invention Figure 2 .

[0033] Fig. 9 for Figure 8 A magnified schematic diagram of the local structure.

[0034] Fig.10 It is a schematic diagram of the process system of the present invention.

[0035] Fig.11 It is a grinding process flow chart of the present invention.

[0036] The accompanying drawings are marked as follows: 1. casing; 101. feed pipe; 102. discharge pipe; 103. air inlet; 2. main shaft; 3. driving component; 4. powder classifier; 5. roller mill mechanism; 501. roller mill frame; 502. roller mill chamber; 503. grinding roller; 504. grinding ring; 505. scraper; 6. blanking plate; 7. throwing plate; 8. scraper mechanism; 801. scraper plate; 802. vertical axis; 803. gear; 804. gear ring; 805. fixed rod; 9. scattering mechanism; 901. horizontal axis; 902. bevel gear; 903. scattering rod; 10. guide ring; 11. air duct; 12. classifier; 13. pulse dust collector; 14. high-pressure centrifugal fan. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Refer to the instruction manual Figures 1 to 5 A ring roller mill device comprises: a casing 1, a driving component 3 is arranged at the bottom of the casing 1, a main shaft 2 is rotatably arranged in the casing 1, the driving component 3 is used to drive the main shaft 2 to rotate, a feed pipe 101 and a discharge pipe 102 are arranged on the casing 1, and a feed end of the discharge pipe 102 extends into the casing 1;

[0039] A roller mill mechanism 5 is arranged in the casing 1, and the roller mill mechanism 5 is used for rolling and grinding graphite particles. The roller mill mechanism 5 includes a roller mill frame 501, and the roller mill frame 501 is fixedly arranged on the main shaft 2. The roller mill frame 501 is provided with a plurality of roller mill cavities 502 in the vertical direction. The roller mill cavities 502 are provided with a plurality of grinding rollers 503 rotating along the circumferential direction of the roller mill frame 501. A grinding ring 504 is fixedly arranged in the casing 1. The plurality of grinding rollers 503 located on the same horizontal plane roll in the corresponding grinding rings 504, and the spacing between the grinding rollers 503 and the grinding rings 504 decreases from top to bottom in the vertical direction.

[0040] An air duct 11 is arranged inside the casing 1, a powder selector 4 is fixedly arranged inside the casing 1, and the powder selector 4 is located inside the port of the feeding end of the discharge pipe 102, and an air inlet 103 is opened outside the casing 1, and the air inlet 103 is connected to the air duct 11;

[0041] During grinding, graphite particles fall down layer by layer from top to bottom, and between each layer of grinding roller 503 and grinding ring 504, the grinding roller 503 rolls in the grinding ring 504 to grind the graphite particles. The graphite particles fall down layer by layer from top to bottom and are rolled and ground for multiple times. The graphite powder formed after grinding is driven by airflow into the powder classifier 4 to be sorted. The qualified graphite powder is discharged through the discharge pipe 102, and the unqualified graphite powder falls back to the roller grinding mechanism 5 for re-grinding.

[0042] It should be noted that the driving component 3 is a reduction motor, and its output shaft is connected to the main shaft 2, so that the main shaft 2 drives the roller mill frame 501 to rotate, and the air duct 11 is arranged on the periphery of the roller mill frame 501, a is the discharge direction of qualified graphite powder, b is the air flow direction, and c is the falling direction of unqualified graphite powder. The graphite powder after layer-by-layer roller grinding enters the air duct 11, and the air flow enters the air duct 11 from the air inlet 103, driving the graphite powder in the air duct 11 to flow upward, and the graphite powder is brought into the powder selector 4 by the air flow. After being sorted by the powder selector 4, the qualified graphite powder is discharged through the discharge pipe 102, and the unqualified graphite powder falls back and is re-ground.

[0043] It should also be noted that the distance between the grinding roller 503 and the grinding ring 504 is the grinding area, which includes four groups of grinding areas from top to bottom. The two groups of grinding areas at the top have the same distance, the two groups of grinding areas at the bottom have the same distance, and the distance between the two groups of grinding areas at the bottom is smaller.

[0044] The implementation scenario is specifically as follows: graphite particles are added into the housing 1 through the feed pipe 101, and the graphite particles fall between the grinding roller 503 and the grinding ring 504 located above. The reduction motor drives the main shaft 2 to drive the roller mill frame 501 to rotate, so that when the roller mill frame 501 rotates, under the action of centrifugal force, the grinding roller 503 rolls in the grinding ring 504 to perform preliminary grinding of the graphite particles. The graphite particles after preliminary grinding continue to fall and are ground layer by layer. Since the spacing between the two sets of grinding areas at the top is greater than the spacing between the grinding areas at the bottom, when the graphite particles are ground layer by layer from top to bottom, the flow of the graphite particles through the grinding area can be improved. The mobility helps to avoid excessive grinding resistance and reduce the resistance of graphite particles in the grinding process, thereby improving the overall fluidity. The spacing between the lower grinding areas is small, which can ensure the grinding effect of the graphite particles. The processing efficiency can be improved without affecting the grinding effect. After the graphite particles are ground into powder, the graphite powder enters the air duct 11, and the air flow enters the air duct 11 from the air inlet 103, so that the air flow drives the powder into the powder classifier 4, and the graphite powder is sorted by the powder classifier 4. The qualified graphite powder is discharged through the discharge pipe 102, and the unqualified graphite powder falls back and is ground again.

[0045] In the above technical scheme, before processing the graphite powder by the ring roller mill, the graphite particles are usually cleaned to remove impurities and oxides on the graphite surface, and then the cleaned graphite particles are dried, and then the dried graphite particles are put into the ring roller mill for grinding. However, this dry grinding method will generate a lot of dust pollution in the factory, which is harmful to the health of the workers. The wet grinding method is not to directly grind the cleaned graphite. This method can avoid the generation of large dust during grinding. After the graphite is ground into powder, the suction effect of the high-pressure centrifugal fan 14 draws the external air into the casing 1, and the generated wind force can both The graphite powder can be transported and the graphite powder can be air-dried by wind when the graphite powder is transported, so as to achieve the effect of dust prevention and drying, reduce drying equipment and optimize the grinding process. However, when the wet grinding method is adopted, since the graphite contains water, when the graphite powder falls on the throwing plate 7, it is easy to stick to the throwing plate 7, and then accumulate into blocks or lumps, which makes it difficult for the throwing plate 7 to throw the graphite powder into the air duct 11 during the rotation process. For this reason, the present invention also provides a specific embodiment of a ring roller mill device with a scraping mechanism 8, which is used to scrape the block or lump graphite powder that falls on the throwing plate 7 into the air duct 11 to ensure the normal implementation of the grinding process.

[0046] Furthermore, if Figures 6 to 9 As shown, a material throwing plate 7 is fixedly provided on the main shaft 2, and a plurality of scraping mechanisms 8 are provided on the material throwing plate 7. The plurality of scraping mechanisms 8 are arranged in a circular array above the material throwing plate 7. The scraping mechanism 8 includes a rotatably arranged scraping plate 801. The scraping plate 801 is arranged in an "S" shape, and the scraping plate 801 contacts the upper surface of the material throwing plate 7. The scraping mechanism 8 is used to scrape the graphite powder clumps accumulated in blocks or lumps away from the material throwing plate 7.

[0047] It should be noted that, by means of the rotatable scraper plate 7 arranged in an "S" shape, when the graphite powder formed by grinding falls onto the flinging plate 7 in blocks or lumps due to the water in the graphite powder, and cannot be flung away from the flinging plate 7 by the rotation of the flinging plate 7, the scraper plate 801 is rotated to scrape the block or lump graphite powder clumps adhering to the flinging plate 7 off the flinging plate 7 and into the air duct 11.

[0048] Furthermore, if Figures 6 to 9 As shown, a vertical shaft 802 is rotatably provided on the material throwing plate 7, a scraper plate 801 is fixedly provided on the vertical shaft 802, a gear 803 is fixedly sleeved on the vertical shaft 802, a gear ring 804 is fixedly provided in the casing 1, the gear 803 is meshed with the gear ring 804, a plurality of fixed rods 805 are fixedly provided on the gear ring 804, and the plurality of fixed rods 805 are fixedly provided on the inner wall of the casing 1.

[0049] It should be noted that the rotation of the main shaft 2 drives the ejector plate 7 to rotate, and thus the vertical shaft 802 drives the scraper plate 801 to rotate through the meshing transmission of the gear ring 804 fixedly set in the casing 1 and the gear 803. Since there are multiple scraper mechanisms 8, the multiple scraper plates 801 in the multiple scraper mechanisms 8 will scrape the block-shaped or lump-shaped graphite powder away from the ejector plate 7 when rotating, so as to prevent the block-shaped or lump-shaped graphite powder from sticking to the ejector plate 7, resulting in the problem that the graphite powder cannot be thrown into the air duct 11.

[0050] It should be further explained that the graphite powder in blocks or lumps adhering to the throwing plate 7 is scraped into the air duct 11 by the scraping mechanism 8. When the graphite powder enters the air duct 11, the graphite powder still remains in blocks or lumps. Since the gravity of the graphite powder in blocks or lumps is relatively large, it is difficult for wind force to overcome its gravity, and the block or lump graphite powder clumps cannot be sent into the powder selector 4 for subsequent sorting by wind force. For this reason, in one embodiment of the present invention, a ring roller mill device with a breaking up mechanism 9 is also proposed, which is used to break up the graphite powder in blocks or lumps when scraping the graphite powder in blocks or lumps into the air duct 11.

[0051] Furthermore, if Figures 6 to 9 As shown, the ring roller mill device includes a plurality of breaking up mechanisms 9, which are arranged in a ring array below the flinging plate 7. The breaking up mechanisms 9 include a horizontal axis 901 rotatably arranged on the bottom side of the flinging plate 7, and a plurality of breaking up rods 903 are fixedly arranged on one end of the horizontal axis 901 away from the flinging plate 7. The breaking up mechanisms 9 are used to break up the graphite powder clumps or blocks that are scraped off the flinging plate 7.

[0052] It should be noted that when the block-shaped or lump-shaped graphite powder clumps are scraped off the throwing plate 7 and into the air duct 11 by the scraping mechanism 8, the horizontal axis 901 rotates to drive the breaking rod 903 to break up the block-shaped or lump-shaped graphite powder clumps, thereby preventing the block-shaped or lump-shaped graphite powder clumps from remaining in block or lump shape when entering the air duct 11.

[0053] Further, further, as Figures 6 to 9 As shown, bevel gears 902 are fixedly arranged at the ends of the horizontal axis 901 and the corresponding vertical axis 802 , and the two bevel gears 902 are meshed with each other.

[0054] It should be noted that while the scraping mechanism 8 is used to scrape the block or lump-shaped graphite powder adhering to the throwing plate 7 into the air duct 11, the meshing transmission of the two corresponding bevel gears 902 causes the horizontal shaft 901 to drive the breaking rod 903 to rotate, so that when the block or lump-shaped graphite powder enters the air duct 11, the block or lump-shaped graphite powder is broken up by the breaking rod 903, destroying the state of the block or lump-shaped graphite powder clusters, thereby solving the technical problem that the wind force cannot overcome the gravity of the graphite powder clusters to send the graphite powder into the powder selector 4.

[0055] Specifically, Figure 4 As shown, a blanking plate 6 is fixedly installed on the main shaft 2, and the upper surface of the blanking plate 6 is inclined. The roller mill frame 501 is located between the blanking plate 6 and the material throwing plate 7. The blanking plate 6 is located above the material throwing plate 7, and the blanking plate 6, the roller mill frame 501 and the material throwing plate 7 are aligned in the vertical direction.

[0056] It should be noted that the blanking plate 6 and the throwing plate 7 are both circular in design. When feeding, the graphite particles can fall onto the blanking plate 6, and through the inclined setting of the upper surface of the blanking plate 6, the graphite particles pass through the inclined surface of the blanking plate 6, slide between the grinding roller 503 and the grinding ring 504, and are ground and fall layer by layer, and fall onto the throwing plate 7.

[0057] Furthermore, if Figures 7 to 9 As shown, a material guide ring 10 is fixedly arranged on the outer edge of the material throwing plate 7 , and the horizontal axis 901 is rotatably arranged in the material guide ring 10 .

[0058] It should be noted that, by providing the guide ring 10 , it is possible to prevent the graphite powder from directly contacting the mechanical structure, thereby avoiding the problem of affecting the normal transmission of the mechanical structure.

[0059] In the above technical solution, since the washed graphite particles contain water, during the rolling and grinding process of the graphite particles by the grinding roller 503, the water in the graphite particles will cause the graphite powder to adhere to the grinding roller 503 when the graphite particles are rolled into graphite powder. Therefore, it is necessary to scrape off the graphite powder adhering to the grinding roller 503 during the rolling and grinding process, such as Figure 5 As shown, a plurality of scrapers 505 are fixedly disposed in the roller grinding chamber 502 , and a plurality of grinding rollers 503 are in contact with corresponding scrapers 505 .

[0060] It should be noted that by arranging the scraper 505 in the roller grinding chamber 502, the grinding roller 503 can rotate and grind the graphite particles while the grinding roller 503 can continuously rotate and contact with the scraper 505, so that during the rolling process, the graphite powder adhering to the grinding roller 503 can be scraped off, thereby preventing the graphite powder from adhering to the grinding roller 503 and affecting normal grinding.

[0061] Furthermore, if Fig.10 As shown, it also includes a classifier 12, a pulse dust collector 13 and a high-pressure centrifugal fan 14. There are two classifiers 12. The air inlet of the classifier 12 close to the casing 1 is connected to the discharge pipe 102 of the casing 1, the discharge port of the classifier 12 close to the casing 1 is connected to the casing 1, the air outlet of the classifier 12 close to the casing 1 is connected to the air inlet of the classifier 12 close to the pulse dust collector 13, the air outlet of the classifier 12 close to the pulse dust collector 13 is connected to the air inlet of the pulse dust collector 13, and the air outlet of the pulse dust collector 13 is connected to the air inlet of the high-pressure centrifugal fan 14.

[0062] It should be noted that, through the suction action of the high-pressure centrifugal fan 14, external air is sucked into the air duct 11 in the casing 1, so that the airflow flows in the air duct 11 to transport the graphite powder, so that the qualified graphite powder enters the classifier 12, and the graphite powder is further sorted by the classifier 12, and the unqualified powder enters the casing 1 through the pipeline for re-grinding, and the fine powder is discharged through the discharge valve below the classifier 12 as the finished product, and a small amount of airflow with fine dust is purified by the pulse dust collector 13 and then discharged.

[0063] Refer to the instruction manual Figures 1 to 11 , a grinding method of a ring roller grinding device, comprising the following steps:

[0064] Step 1: Add graphite particles into the housing 1 from the feed pipe 101, and the driving component 3 drives the roller mill mechanism 5 to rotate through the main shaft 2, so that the grinding roller 503 rolls in the grinding ring 504 to grind the graphite particles, and the ground graphite powder falls and falls onto the throwing plate 7;

[0065] Step 2: During the rotation of the roller mill mechanism 5, the scraper plate 801 in the scraper mechanism 8 scrapes the agglomerated or lumped graphite powder into the air duct 11, and when the agglomerated or lumped graphite powder enters the air duct 11, the breaking mechanism 9 breaks up the agglomerated or lumped graphite powder through the breaking rod 903 and drops the agglomerated or lumped graphite powder into the air duct 11;

[0066] Step 3: The high-pressure centrifugal fan 14 allows the air flow to enter the air duct 11 through the air inlet 103, and drives the graphite powder into the powder classifier 4 for sorting. The qualified graphite powder is discharged through the discharge pipe 102, and the unqualified graphite powder falls back and is re-ground.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A roller mill device, It is characterized in that include: A casing (1), wherein a driving component (3) is arranged at the bottom of the casing (1), a main shaft (2) is rotatably arranged in the casing (1), and the driving component (3) is used to drive the main shaft (2) to rotate, and a feed pipe (101) and a discharge pipe (102) are arranged on the casing (1), and the feed end of the discharge pipe (102) extends into the casing (1); A roller grinding mechanism (5) is arranged in the casing (1), and the roller grinding mechanism (5) is used for rolling and grinding graphite particles. The roller grinding mechanism (5) comprises a roller grinding frame (501), the roller grinding frame (501) is fixedly arranged on the main shaft (2), and the roller grinding frame (501) is provided with a plurality of roller grinding cavities (502) in the vertical direction, and a plurality of grinding rollers (503) are arranged in the roller grinding cavities (502) along the circumferential direction of the roller grinding frame (501) to rotate, and a grinding ring (504) is fixedly arranged in the casing (1), and a plurality of grinding rollers (503) located on the same horizontal plane roll in corresponding grinding rings (504), and the spacing between the grinding rollers (503) and the grinding rings (504) decreases from top to bottom in the vertical direction; An air duct (11) is arranged on the inner side of the casing (1), a powder classifier (4) is fixedly arranged inside the casing (1), the powder classifier (4) is located on the inner side of the port at the feeding end of the discharge pipe (102), an air inlet (103) is arranged on the outer side of the casing (1), and the air inlet (103) is connected to the air duct (11); During grinding, graphite particles fall from top to bottom layer by layer, and between each layer of grinding rollers (503) and grinding rings (504), the grinding rollers (503) roll in the grinding rings (504) to grind the graphite particles. The graphite particles fall from top to bottom layer by layer and are subjected to multiple rolling and grinding. The graphite powder formed after grinding is driven by airflow into the powder classifier (4) to classify the graphite powder. The qualified graphite powder after classification is discharged through the discharge pipe (102), and the unqualified graphite powder falls back to the roller grinding mechanism (5) to be ground again.

2. A roller mill device according to claim 1, Features: A material throwing plate (7) is fixedly arranged on the main shaft (2), and a plurality of scraping mechanisms (8) are arranged on the material throwing plate (7). The plurality of scraping mechanisms (8) are arranged in a ring array above the material throwing plate (7). The scraping mechanism (8) comprises a rotatably arranged scraping plate (801), the scraping plate (801) is arranged in an "S" shape, and the scraping plate (801) is in contact with the upper surface of the material throwing plate (7). The scraping mechanism (8) is used to scrape the graphite powder in a lump or lump shape away from the material throwing plate (7).

3. A roller mill device according to claim 2, Features: The material-stripping plate (7) is rotatably provided with a vertical shaft (802), the material-scraping plate (801) is fixedly provided on the vertical shaft (802), a gear (803) is fixedly sleeved on the vertical shaft (802), a gear ring (804) is fixedly provided inside the housing (1), the gear (803) meshes with the gear ring (804), a plurality of fixed rods (805) are fixedly provided on the gear ring (804), and the plurality of fixed rods (805) are fixedly provided on the inner wall of the housing (1).

4. A roller mill device according to claim 3, Features: The invention also comprises a plurality of dispersing mechanisms (9), which are arranged in a circular array below the material-spinning plate (7), and the dispersing mechanisms (9) comprise a transverse axis (901) rotatably arranged on the bottom side of the material-spinning plate (7), and a plurality of dispersing rods (903) are fixedly arranged at one end of the transverse axis (901) away from the material-spinning plate (7). The dispersing mechanisms (9) are used to disperse the agglomerated or lumpy graphite powder clumps scraped off the material-spinning plate (7).

5. A roller mill device according to claim 4, Features: Bevel gears (902) are fixedly arranged at the ends of the horizontal axis (901) and the corresponding vertical axis (802), and the two bevel gears (902) are meshed with each other.

6. A roller mill device according to claim 5, Features: A blanking plate (6) is fixedly arranged on the main shaft (2), the upper surface of the blanking plate (6) is inclined, the roller mill frame (501) is located between the blanking plate (6) and the material throwing plate (7), the blanking plate (6) is located above the material throwing plate (7), and the blanking plate (6), the roller mill frame (501) and the material throwing plate (7) are aligned in the vertical direction.

7. A roller mill device according to claim 6, Features: A material guide ring (10) is fixedly arranged on the outer edge of the material throwing plate (7), and the transverse axis (901) is rotatably arranged inside the material guide ring (10).

8. A roller mill device according to claim 1, Features: A plurality of scrapers (505) are fixedly arranged in the roller grinding chamber (502), and a plurality of grinding rollers (503) are in contact with corresponding scrapers (505).

9. A roller mill device according to claim 1, Features: The invention also comprises a classifier (12), a pulse dust collector (13) and a high-pressure centrifugal fan (14). There are two classifiers (12). The air inlet of the classifier (12) close to the casing (1) is connected to the discharge pipe (102) of the casing (1). The discharge port of the classifier (12) close to the casing (1) is connected to the casing (1). The air outlet of the classifier (12) close to the casing (1) is connected to the air inlet of the classifier (12) close to the pulse dust collector (13). The air outlet of the classifier (12) close to the pulse dust collector (13) is connected to the air inlet of the pulse dust collector (13). The air outlet of the pulse dust collector (13) is connected to the air inlet of the high-pressure centrifugal fan (14).

10. A grinding method of a ring roller grinding device according to claim 7, It is characterized in that The following steps are involved: Step 1: Add graphite particles from the feed pipe (101) into the housing (1), and the driving component (3) drives the roller mill mechanism (5) to rotate through the main shaft (2), so that the grinding roller (503) rolls in the grinding ring (504) to grind the graphite particles, and the ground graphite powder falls onto the throwing plate (7); Step 2: During the rotation of the roller mill mechanism (5), the scraper plate (801) in the scraper mechanism (8) scrapes the agglomerated or lumped graphite powder into the air duct (11); and when the agglomerated or lumped graphite powder enters the air duct (11), the breaking mechanism (9) breaks up the agglomerated or lumped graphite powder through the breaking rod (903) and the agglomerated or lumped graphite powder falls into the air duct (11); Step 3: The high-pressure centrifugal fan (14) allows the air flow to enter the air duct (11) through the air inlet (103), and drives the graphite powder into the powder classifier (4) for classification. The qualified graphite powder is discharged through the discharge pipe (102), and the unqualified graphite powder falls back and is re-ground.

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