Crushing device for graphite preparation and method and steps for preparing refined structured graphite

Abstract

The present invention relates to a pulverizing device for graphite preparation and a method and steps for preparing refined structural graphite, which include a pulverizing venturi tube as an inlet, a pulverizing air inlet pipe arranged on the pulverizing venturi tube, a pulverizing box body arranged below the outlet of the pulverizing venturi tube, a pulverizing flow guide top wall arranged between the top and side walls of the inner cavity of the pulverizing box body, a pulverizing L-shaped impact plate arranged at the top of the inner cavity of the pulverizing box body, a pulverizing upper section rotating hollow shaft arranged below the pulverizing L-shaped impact plate and with a center hole for feeding gas, a pulverizing synchronous driving gear set arranged on the pulverizing box body and driving the pulverizing upper section rotating hollow shaft to rotate in the same direction, pulverizing impact fins distributed on the pulverizing upper section rotating hollow shaft, and a pulverizing blanking gap arranged between axially adjacent pulverizing impact fins. The present invention has a reasonable design, a compact structure and is easy to use.

Description

Technical Field

[0001] The invention relates to a pulverizing device for graphite preparation and a method and steps for preparing refined structured graphite. Background Art

[0002] China is a major producer of synthetic diamonds, experiencing rapid growth and ranking first in global production for many consecutive years. Within the country's vast synthetic diamond tool and product industry, graphite is used as molds in the hot-pressing and sintering processes for diamond drill bits and saw blades. This is due to the high melting point of carbon-graphite products, which enhance their mechanical strength at high temperatures, rather than decreasing. Traditional graphite molds used in hot-pressing diamond sintering are typically made from high-purity graphite blanks with a conventional fine-grained structure. This type of graphite has an average particle size of 45 to 55 μm, resulting in a less dense microstructure, larger pores, a lower machinability, poor oxidation resistance, and a shorter service life of typically 4 to 6 cycles.

[0003] Ultrafine powders refer to tiny solid particles with a size between molecules, atoms, and bulk materials, usually ranging from 1 to 100 μm, including particles of various materials such as metals, non-metals, organic, inorganic, and biological materials. Ultrafine powders are usually divided into micron, submicron, and nanometer powders. Powders with a particle size greater than 1 μm are called micron materials, powders with a particle size less than 1 μm and greater than 0.1 μm are called submicron materials, and powders with a particle size between 0.001 and 0.1 μm (i.e., 1 to 100 μm) are called nanomaterials. After ultrafine processing, especially when the material is in the submicron and nano states, its scale is between atoms, molecules, and bulk materials, so some people call it the fourth state of matter. As materials become ultrafine, their surface molecular arrangement, electron distribution, and crystal structure change, resulting in unique surface effects, small-size effects, quantum effects, and macroscopic quantum tunneling effects not found in bulk materials. As a result, ultrafine powders possess a range of superior physical, chemical, and surface and interfacial properties compared to conventional bulk materials, enabling exceptional results in their applications. Graphite possesses exceptional lubricity and toughness, and ultrafine graphite powder, with its unique properties, is widely applicable across various fields. Producing ultrafine graphite powder has always been a hot topic and a challenge in graphite processing.

[0004] Ultrafine graphite is made from natural flake graphite and artificial graphite. Flake graphite is a type of graphite with scaly, thin, leaf-like crystals, typically measuring (1.2.0) x (0.1.0) mm, with a maximum size of 4-5 mm and a thickness of 0.02-0.05 mm. It is often found in rocks in impregnated or gneissic forms, with a distinct directional arrangement. Microcrystalline graphite is a collection of microcrystalline graphite, typically less than 1 micron in diameter. Its crystalline form can only be seen under an electron microscope. Artificial graphite is made from anthracite, coke, or petroleum coke, which is then crushed, mixed with coal tar and asphalt, extruded or molded, and then calcined in an airtight electric furnace. Calcination at 800-1300°C for approximately 200-250 hours yields amorphous carbon. If it is then calcined at a high temperature of 2400-2800℃ for 60-70h to crystallize the carbon and obtain artificial graphite, the ultrafine powder will attract each other and have a stable tendency due to its large specific surface area, high surface energy and extremely unstable particles. This tendency causes the particles to agglomerate and affects its application effect. Ultrafine powders with poor dispersibility may even completely lose their original advantages in actual use, and the effect of use may be counterproductive. Therefore, in a sense, the dispersion technology of ultrafine powders is the most critical technology in ultrafine powder technology.

[0005] The pretreatment of graphite powder includes flotation, dehydration and drying processes, but the existing processes have low efficiency in graphite crushing and cannot achieve energy-saving utilization. Summary of the Invention

[0006] The technical problem to be solved by this invention is generally to provide a pulverizing device for graphite production and a method and steps for preparing fine-structured graphite. The parent case is "Fine-structured graphite production equipment and preparation method" (Application date: February 20, 2020, Application No. CN202010103225.5).

[0007] In order to solve the above problems, the technical solution adopted by the present invention is:

[0008] A pulverizing device for graphite preparation includes a pulverizing venturi tube as an inlet, a pulverizing air inlet pipe arranged on the pulverizing venturi tube, a pulverizing box body arranged below the outlet of the pulverizing venturi tube, a pulverizing flow guide top wall arranged between the top and side walls of the inner cavity of the pulverizing box body, a pulverizing L-shaped impact plate arranged at the top of the inner cavity of the pulverizing box body, a pulverizing upper section rotating hollow shaft arranged below the pulverizing L-shaped impact plate and having a center hole for feeding gas, a pulverizing synchronous driving gear set arranged on the pulverizing box body and driving the pulverizing upper section rotating hollow shaft to rotate in the same direction, pulverizing impact fins distributed on the pulverizing upper section rotating hollow shaft, and a pulverizing impact plate arranged between axially adjacent pulverizing impact fins. A pulverizing gap, a pulverizing spacer sleeve mounted on the pulverizing upper section rotating hollow shaft and located at the pulverizing gap, a pulverizing air blowing nozzle arranged on the pulverizing spacer sleeve and connected to the center hole at its root and spraying graphite powder into the pulverizing box at its end, a pulverizing lower section rotating hollow shaft arranged below the pulverizing upper section and having fins for impacting the graphite powder falling from the pulverizing gap, a collecting box arranged in the pulverizing lower collecting cavity below the pulverizing lower section rotating hollow shaft, a collecting triangular roof arranged on the top of the collecting box, a collecting side feeding mesh arranged on the outer side wall of the collecting box, a collecting box arranged on the side wall of the collecting box and used to horizontally collect the fallen graphite powder A crushing feed nozzle that blows into the collecting side feed mesh, a forty-five-degree collecting inclined box body that is arranged in the inner cavity of the collecting box and is located below the collecting triangular roof and is used to redirect the graphite blown into the collecting side feed mesh holes downward, a collecting guide channel that is arranged between the forty-five-degree collecting inclined box body and the inner wall of the collecting box, a collecting output skirt mesh belt whose input end is arranged below the collecting guide channel, an eccentric upper pressure roller whose lower end contacts the upper surface of the downward section of the output end of the collecting output skirt mesh belt, a collecting eccentric lower pressure roller whose upper end contacts the lower surface of the downward section of the output end of the collecting output skirt mesh belt, a collecting eccentric lower pressure roller that is arranged on one side of the inner cavity of the crushing box and the output end of the collecting output skirt mesh belt is located therein A crushing wind overflow chamber, a collecting belt raised roller arranged at the output end of the collecting output skirt mesh belt and used to push out the graphite in the mesh, a discharging box arranged below the output end of the collecting output skirt mesh belt, a discharging flip bottom arranged below the discharging box, a collecting upper one-way baffle arranged on the crushing box and corresponding to the upward section of the collecting output skirt mesh belt, a collecting counterweight block arranged on the collecting upper one-way baffle and corresponding to the downward section of the collecting output skirt mesh belt, a collecting lower baffle arranged on the crushing box, a recovery channel inlet arranged at the lower end of the crushing lower collecting cavity and used to collect graphite powder, and a recovery channel outlet arranged on the crushing venturi tube and connected to the recovery channel inlet.

[0009] The crushing device also includes a reverse blowing pipe arranged on the 45-degree collecting inclined box body and used for feeding gas, and a reverse baffle arranged on the lower inclined surface of the 45-degree collecting inclined box body and used for one-way ventilation.

[0010] The crushing device also includes a residual air outlet pipe arranged on the top of the crushing air overflow chamber, a residual air inlet pipe arranged on the drying and exhaust chamber of the drying device and corresponding to the drying conveyor belt, and a residual air blower arranged between the residual air outlet pipe and the residual air inlet pipe.

[0011] A method for preparing fine structure graphite, using a fine structure graphite production device, the method comprising a first step of drying and / or a second step of crushing;

[0012] Wherein step 1 drying step comprises:

[0013] Step one, in the drying and exhausting chamber; first, open the drying feed valve and feed the prefabricated graphite powder into the drying front mesh belt through the drying feed port; then, start the drying exhaust fan to exhaust the graphite powder on the drying front mesh belt to absorb moisture, and at the same time, the drying and replenishing hot air pipe bakes the graphite powder on the drying front mesh belt; secondly, the drying pulling rotation motor drives the drying rod belt raised pulling roller to rotate unidirectionally, and at the same time, starts the drying reciprocating U-shaped frame to reciprocate linearly, and under the unidirectional transmission action of the drying one-way ratchet pawl assembly, the drying pulling rack drives the drying non-return rotating roller to rotate unidirectionally, so that the meshing gear drives the drying non-return rotating roller to engage with the transverse strip protrusion to prevent the drying conveyor belt from retreating during traction, thereby realizing intermittent driving of the drying conveyor belt forward and entering the drying and exhausting chamber through the drying isolation channel;

[0014] Steps 1 and 2: In the drying and extraction chamber, first, the drying heater dries the graphite powder; then, at the folded portion of the drying front mesh belt output, the graphite in the drying conveyor belt mesh is pushed out by the raised pulling rollers of the drying rod belt and falls into the drying discharge hopper;

[0015] The second crushing step includes:

[0016] Step 21: First, air flow is sent in through the crushing air inlet pipe, and the graphite powder fed into the crushing venturi tube is accelerated and input into the inner cavity of the crushing box; then, the falling graphite powder hits the crushing impact fins, and the falling graphite powder is impacted for the second time by the rotating hollow shaft of the crushing descending section; secondly, the falling graphite powder is blown at the crushing blowing nozzle to prevent it from adhering to the crushing impact fins, and at the same time, the reaction force generated by the reversal of the crushing impact fins knocks the graphite powder back to the crushing L-shaped impact plate, and the crushing L-shaped impact plate is used to achieve a head-on collision with the graphite powder; again, the graphite powder that falls after the head-on collision enters the lower crushing collection cavity below, and is blown horizontally into the collecting side feeding mesh through the crushing air inlet nozzle; immediately afterwards, the graphite powder that has not entered the side feeding mesh and falls is sent back into the inner cavity of the crushing box through the recovery channel outlet for crushing;

[0017] Step 22: First, the graphite blown into the feeding mesh of the collecting side is redirected downward into the collecting guide channel through the 45-degree collecting inclined box; then, the graphite powder is output to the collecting output skirt mesh belt through the collecting output skirt mesh belt, and the collecting eccentric lower pressure roller and the eccentric upper pressure roller use eccentricity to mechanically vibrate the collecting output skirt mesh belt, and the graphite in the mesh is pushed out by the raised roller of the collecting belt and collected by the discharging box; finally, the graphite powder is output by turning the bottom surface of the discharging, and the exhaust air is sent to the residual air inlet pipe again through the residual air outlet pipe and the residual air blower to air-dry the graphite powder on the drying conveyor belt;

[0018] When the side feed mesh is clogged, the reverse baffle is opened to blow air in the reverse direction through the reverse blowing pipe. The invention has a reasonable design, low cost, durability, safety and reliability, simple operation, time and labor saving, money saving, compact structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the device of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the drying device of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the crushing device of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the explosion of the crushing device of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of a part of the crushing device of the present invention.

[0024] Among them: 1. Drying device; 2. Crushing device; 3. Drying box; 4. Drying feed port; 5. Drying hot air supply pipe; 6. Drying isolation plate; 7. Drying extraction chamber; 8. Drying heating chamber; 9. Drying isolation channel; 10. Drying forward mesh belt; 11. Drying exhaust fan; 12. Drying heater; 13. Drying first rear return conveyor belt; 14. Drying second front folding conveyor belt; 15. Drying return skirt belt; 16. Drying reciprocating U Frame; 17. Drying rod with raised pulling roller; 18. Drying pulling rotating motor; 19. Drying pulling rack; 20. Drying non-return rotating roller; 21. Drying one-way ratchet pawl assembly; 22. Drying feed valve; 23. Drying discharge funnel; 24. Grinding venturi tube; 25. Grinding air inlet pipe; 26. Grinding box; 27. Grinding air overflow cavity; 28. Grinding guide top wall; 29. ​​Grinding synchronous drive gear set; 30. Grinding upward 31. Crushing L-shaped impact plate; 32. Crushing impact fins; 33. Crushing blanking gap; 34. Crushing interval sleeve; 35. Crushing blowing nozzle; 36. Crushing downward section rotating hollow shaft; 37. Crushing lower collection cavity; 38. Crushing feeding nozzle; 39. Collection box; 40. Collection triangle roof; 41. Collection side feeding mesh; 42. 45-degree collection inclined box; 43. Collection guide channel; 44. Collection Collecting output skirt mesh belt; 45. Collecting eccentric upper pressure roller; 46. Collecting eccentric lower pressure roller; 47. Collecting belt raised roller; 48. Discharging box; 49. Discharging flip bottom; 50. Collecting upper one-way baffle; 51. Collecting counterweight block; 52. Collecting lower baffle; 53. Reverse blowing pipe; 54. Reverse baffle; 55. Recovery channel inlet; 56. Recovery channel outlet; 57. Residual air outlet pipe; 58. Residual air blower; 59. Residual air inlet pipe. DETAILED DESCRIPTION

[0025] like Figure 1-5 As shown, the refined structure graphite production equipment of this embodiment includes a drying device 1 and a crushing device 2 connected to the output end of the drying device 1.

[0026] The drying device 1 includes a drying box 3, a drying feed port 4 provided at the upper end of one side of the drying box 3, a drying isolation plate 6 provided in the drying box 3, a drying extraction chamber 7 provided on one side of the drying isolation plate 6, a drying heating chamber 8 provided on the other side of the drying isolation plate 6, a drying isolation passage 9 provided on the drying isolation plate 6, and a drying conveyor belt passing through the drying isolation passage 9 and transmitting between the drying extraction chamber 7 and the drying heating chamber 8;

[0027] A drying exhaust fan 11 is provided in the drying and exhausting chamber 7 below the drying front mesh belt 10 , and the drying exhaust fan 11 is connected to an exhaust passage.

[0028] The drying conveyor belt includes a drying forward mesh belt 10 that passes through the drying isolation channel 9 and enters the drying and heating chamber 8 from the drying and exhausting chamber 7;

[0029] A drying and supplementary hot air pipe 5 is provided on the drying and exhausting chamber 7;

[0030] A drying feed valve 22 is provided at the drying feed inlet 4;

[0031] A drying heater 12 is provided in the drying and heating chamber 8 above and / or below the drying front mesh belt 10. A drying first return conveyor belt 13 is folded back at the output end of the drying front mesh belt 10. The output end of the drying first return conveyor belt 13 is connected to a drying second forward folding conveyor belt 14. A drying return skirt belt 15 is connected between the output end of the drying second forward folding conveyor belt 14 and the input end of the drying front mesh belt 10.

[0032] A drying discharge hopper 23 is provided at the point where the graphite on the drying front mesh belt 10 returns to the drying first rear return conveyor belt 13 and / or at the point where the drying second front fold conveyor belt 14 returns to the drying return skirt belt 15;

[0033] The inlet of the crushing device 2 is located below the drying discharge funnel 23;

[0034] The back of the drying conveyor belt is provided with a transverse strip protrusion, and a drying non-return rotating roller 20 for rolling contact with the transverse strip protrusion is provided above the reverse end of the first drying return conveyor belt 13.

[0035] A drying rod belt raised pulling roller 17 is provided at the drying front mesh belt 10 and the drying first rear return conveyor belt 13. A drying reciprocating U-shaped frame 16 is provided in the drying heating chamber 8 for driving the drying rod belt raised pulling roller 17 to move longitudinally. A drying pulling rotary motor 18 is provided on the drying reciprocating U-shaped frame 16 for driving the drying rod belt raised pulling roller 17 to rotate unidirectionally. The protrusion of the drying rod belt raised pulling roller 17 is used to push out the graphite in the mesh of the drying conveyor belt.

[0036] A drying reciprocating U-shaped frame 16 is provided with a drying non-return rotating roller 20 and a drying pulling rack 19 that rotates in one direction. A meshing gear with a drying one-way ratchet pawl assembly 21 is provided between the drying non-return rotating roller 20 and the drying pulling rack 19.

[0037] The pulverizing device 2 includes a pulverizing venturi tube 24 as an inlet, a pulverizing air inlet pipe 25 arranged on the pulverizing venturi tube 24, a pulverizing box 26 arranged below the outlet of the pulverizing venturi tube 24, a pulverizing flow guide top wall 28 arranged between the top and side walls of the inner cavity of the pulverizing box 26, a pulverizing L-shaped impact plate 31 arranged at the top of the inner cavity of the pulverizing box 26, a pulverizing upper section rotating hollow shaft 30 arranged below the pulverizing L-shaped impact plate 31 and having a center hole for feeding gas, a pulverizing synchronous drive gear set 29 arranged on the pulverizing box 26 and driving the pulverizing upper section rotating hollow shaft 30 to rotate in the same direction, pulverizing impact fins 32 distributed on the pulverizing upper section rotating hollow shaft 30, and a pulverizing blanking gap 33 arranged between axially adjacent pulverizing impact fins 32. , a pulverizing spacer sleeve 34 which is mounted on the pulverizing upper section rotating hollow shaft 30 and is located at the pulverizing blanking gap 33, a pulverizing air blowing nozzle 35 which is arranged on the pulverizing spacer sleeve 34 and whose root is connected to the central hole and whose end nozzle sprays graphite powder into the pulverizing box 26, a pulverizing lower section rotating hollow shaft 36 which is arranged below the pulverizing upper section rotating hollow shaft 30 and whose fins are used to impact the graphite powder falling from the pulverizing blanking gap 33, a collecting box 39 which is arranged in the pulverizing lower collecting cavity 37 below the pulverizing lower section rotating hollow shaft 36, a collecting triangular roof 40 which is arranged on the top of the collecting box 39, a collecting side feeding mesh 41 which is arranged on the outer wall of the collecting box 39, a collecting box 39 which is arranged on the side wall of the collecting box 39 and is used to blow the falling graphite powder horizontally into the collecting side The crushing air inlet nozzle 38 in the feeding mesh 41, the forty-five-degree collecting inclined box 42 arranged in the inner cavity of the collecting box 39 and located below the collecting triangular roof 40 and used to redirect the graphite blown into the collecting side feeding mesh 41 downward, the collecting guide channel 43 arranged between the forty-five-degree collecting inclined box 42 and the inner wall of the collecting box 39, the collecting output skirt mesh belt 44 with its input end arranged below the collecting guide channel 43, the eccentric upper pressure roller 45 whose lower end contacts the upper surface of the downward section of the output end of the collecting output skirt mesh belt 44, the collecting eccentric lower pressure roller 46 whose upper end contacts the lower surface of the downward section of the output end of the collecting output skirt mesh belt 44, the crushing air overflow arranged on one side of the inner cavity of the crushing box 26 and in which the output end of the collecting output skirt mesh belt 44 is located A cavity 27, a collecting belt raised roller 47 arranged at the output end of the collecting and output skirt mesh belt 44 and used to push out the graphite in the mesh, a discharge box 48 arranged below the output end of the collecting and output skirt mesh belt 44, a discharge flip bottom 49 arranged below the discharge box 48, a collecting upper one-way baffle 50 arranged on the crushing box 26 and corresponding to the upward section of the collecting and output skirt mesh belt 44, a collecting counterweight block 51 arranged on the collecting upper one-way baffle 50 and corresponding to the downward section of the collecting and output skirt mesh belt 44, a collecting lower baffle 52 arranged on the crushing box 26, a recovery channel inlet 55 arranged at the lower end of the crushing lower collecting cavity 37 and used to collect graphite powder, and a recovery channel outlet 56 arranged on the crushing venturi tube 24 and connected to the recovery channel inlet 55.

[0038] The pulverizing device 2 further includes a reverse blowing pipe 53 provided on the 45-degree collecting inclined box body 42 and used for introducing gas, and a reverse baffle 54 provided on the lower inclined surface of the 45-degree collecting inclined box body 42 and for one-way ventilation.

[0039] The pulverizing device 2 also includes a residual air outlet pipe 57 arranged at the top of the pulverizing air overflow chamber 27, a residual air inlet pipe 59 arranged on the drying and extraction chamber 7 of the drying device 1 and corresponding to the drying conveyor belt, and a residual air blower 58 arranged between the residual air outlet pipe 57 and the residual air inlet pipe 59.

[0040] The refined structure graphite production equipment of this embodiment includes a drying device 1, which includes a drying box 3, a drying feed port 4 provided at an upper end of one side of the drying box 3, a drying isolation plate 6 provided in the drying box 3, a drying and draining chamber 7 provided on one side of the drying isolation plate 6, a drying and heating chamber 8 provided on the other side of the drying isolation plate 6, a drying isolation channel 9 provided on the drying isolation plate 6, and a drying conveyor belt passing through the drying isolation channel 9 and transmitting between the drying and draining chamber 7 and the drying and heating chamber 8;

[0041] A drying exhaust fan 11 is provided below the drying front mesh belt 10 in the drying and exhaust chamber 7, and the drying exhaust fan 11 is connected to an exhaust duct;

[0042] The drying conveyor belt includes a drying forward mesh belt 10 that passes through the drying isolation channel 9 and enters the drying and heating chamber 8 from the drying and exhausting chamber 7;

[0043] A drying and supplementary hot air pipe 5 is provided on the drying and exhausting chamber 7;

[0044] A drying feed valve 22 is provided at the drying feed inlet 4;

[0045] A drying heater 12 is provided in the drying and heating chamber 8 above and / or below the drying front mesh belt 10. A drying first return conveyor belt 13 is folded back at the output end of the drying front mesh belt 10. The output end of the drying first return conveyor belt 13 is connected to a drying second forward folding conveyor belt 14. A drying return skirt belt 15 is connected between the output end of the drying second forward folding conveyor belt 14 and the input end of the drying front mesh belt 10.

[0046] A drying discharge hopper 23 is provided at the point where the graphite on the drying front mesh belt 10 returns to the drying first rear return conveyor belt 13 and / or at the point where the drying second front fold conveyor belt 14 returns to the drying return skirt belt 15;

[0047] The inlet of the crushing device 2 is located below the drying discharge funnel 23;

[0048] The back of the drying conveyor belt has a transverse strip protrusion, and a drying non-return rotating roller 20 for rolling contact with the transverse strip protrusion is provided above the reverse end of the first drying return conveyor belt 13;

[0049] A drying rod belt raised pulling roller 17 is provided at the drying front mesh belt 10 and the drying first rear return conveyor belt 13. A drying reciprocating U-shaped frame 16 is provided in the drying heating chamber 8 for driving the drying rod belt raised pulling roller 17 to move longitudinally. A drying pulling rotary motor 18 is provided on the drying reciprocating U-shaped frame 16 for driving the drying rod belt raised pulling roller 17 to rotate unidirectionally. The protrusion of the drying rod belt raised pulling roller 17 is used to push out the graphite in the mesh of the drying conveyor belt.

[0050] A drying reciprocating U-shaped frame 16 is provided with a drying non-return rotating roller 20 and a drying pulling rack 19 that rotates in one direction. A meshing gear with a drying one-way ratchet pawl assembly 21 is provided between the drying non-return rotating roller 20 and the drying pulling rack 19.

[0051] The refined structure graphite production equipment of this embodiment includes a crushing device 2,It includes a crushing venturi tube 24 as an inlet, a crushing air inlet pipe 25 arranged on the crushing venturi tube 24, a crushing box 26 arranged below the outlet of the crushing venturi tube 24, a crushing guide top wall 28 arranged between the top of the inner cavity and the side wall of the crushing box 26, a crushing L-shaped impact plate 31 arranged at the top of the inner cavity of the crushing box 26, a crushing upper section rotating hollow shaft 30 arranged below the crushing L-shaped impact plate 31 and with a center hole for feeding gas, a crushing synchronous driving gear set 29 arranged on the crushing box 26 and driving the crushing upper section rotating hollow shaft 30 to rotate in the same direction, crushing impact fins 32 distributed on the crushing upper section rotating hollow shaft 30, a crushing blanking gap 33 arranged between axially adjacent crushing impact fins 32, and a set of A pulverizing spacer sleeve 34 is located on the pulverizing upper section rotating hollow shaft 30 and at the pulverizing blanking gap 33; a pulverizing air blowing nozzle 35 is arranged on the pulverizing spacer sleeve 34 and the root of which is connected to the central hole and the end nozzle of which sprays graphite powder into the pulverizing box 26; a pulverizing lower section rotating hollow shaft 36 is arranged below the pulverizing upper section rotating hollow shaft 30 and the fins are used to impact the graphite powder falling from the pulverizing blanking gap 33; a collecting box 39 is arranged in the pulverizing lower collecting cavity 37 below the pulverizing lower section rotating hollow shaft 36; a collecting triangular roof 40 is arranged on the top of the collecting box 39; a collecting side feeding mesh 41 is arranged on the outer side wall of the collecting box 39; a collecting box 39 is arranged on the side wall of the collecting box 39 and is used to blow the falling graphite powder horizontally into the collecting side feeding mesh. A crushing air inlet nozzle 38 in the mesh 41, a forty-five-degree collecting inclined box 42 arranged in the inner cavity of the collecting box 39 and located below the collecting triangular roof 40 and used to redirect the graphite blown into the collecting side feeding mesh 41 downward, a collecting guide channel 43 arranged between the forty-five-degree collecting inclined box 42 and the inner wall of the collecting box 39, a collecting output skirt mesh belt 44 with its input end arranged below the collecting guide channel 43, an eccentric upper pressure roller 45 whose lower end contacts the upper surface of the downward section of the output end of the collecting output skirt mesh belt 44, a collecting eccentric lower pressure roller 46 whose upper end contacts the lower surface of the downward section of the output end of the collecting output skirt mesh belt 44, and a crushing air overflow chamber arranged on one side of the inner cavity of the crushing box 26 and in which the output end of the collecting output skirt mesh belt 44 is located body 27, a collecting belt raised roller 47 provided at the output end of the collecting and outputting skirt mesh belt 44 and used to push out the graphite in the mesh, a discharging box 48 provided below the output end of the collecting and outputting skirt mesh belt 44, a discharging turning bottom surface 49 provided below the discharging box 48, a collecting upper one-way baffle 50 provided on the pulverizing box 26 and corresponding to the upward section of the collecting and outputting skirt mesh belt 44, a collecting counterweight 51 provided on the collecting upper one-way baffle 50 and corresponding to the downward section of the collecting and outputting skirt mesh belt 44, a collecting lower baffle 52 provided on the pulverizing box 26, a recovery channel inlet 55 provided at the lower end of the pulverizing lower collecting cavity 37 and used to collect graphite powder, and a recovery channel outlet 56 provided on the pulverizing venturi tube 24 and connected to the recovery channel inlet 55.

[0052] A reverse blowing pipe 53 provided on the 45-degree collecting inclined box body 42 and used for feeding gas, a reverse baffle 54 provided on the lower inclined surface of the 45-degree collecting inclined box body 42 and ventilating in one direction,

[0053] A residual air outlet pipe 57 is provided at the top of the crushing air overflow chamber 27, a residual air inlet pipe 59 is provided on the drying and extraction chamber 7 of the drying device 1 and corresponds to the drying conveyor belt, and a residual air blower 58 is provided between the residual air outlet pipe 57 and the residual air inlet pipe 59.

[0054] The method for preparing fine structure graphite of this embodiment, with the aid of fine structure graphite production equipment, comprises step 1, a drying step and / or step 2, a crushing step;

[0055] Wherein step 1 drying step comprises:

[0056] Step 11, in the drying and exhausting chamber 7; first, open the drying feed valve 22, and feed the prefabricated graphite powder into the drying front mesh belt 10 through the drying feed port 4; then, start the drying exhaust fan 11 to exhaust and absorb moisture from the graphite powder on the drying front mesh belt 10, and at the same time, dry and replenish the hot air pipe 5 to bake the graphite powder on the drying front mesh belt 10; secondly, the drying pulling rotation motor 18 drives the drying rod belt raised pulling roller 17 to rotate unidirectionally, and at the same time, starts the drying reciprocating U-shaped frame 16 to reciprocate linearly, and under the unidirectional transmission action of the drying one-way ratchet pawl assembly 21, the drying pulling rack 19 drives the drying non-return rotating roller 20 to rotate unidirectionally, so that the meshing gear drives the drying non-return rotating roller 20 to engage with the transverse strip protrusion to prevent the drying conveyor belt from retreating during traction, thereby realizing intermittent driving of the drying conveyor belt forward and entering the drying and exhausting chamber 7 through the drying isolation channel 9;

[0057] In step 1 and 2, in the drying and draining chamber 7, the drying heater 12 first dries the graphite powder; then, at the folded portion of the output end of the drying front mesh belt 10, the graphite in the mesh of the drying conveyor belt is pushed out by the raised pulling roller 17 of the drying rod belt and falls into the drying discharge funnel 23;

[0058] The second crushing step includes:

[0059] Step 21: First, the air flow is fed into the crushing air inlet pipe 25, and the graphite powder fed into the crushing venturi tube 24 is accelerated and input into the inner cavity of the crushing box 26; then, the falling graphite powder hits the crushing impact fin 32, and the falling graphite powder is hit twice by the rotating hollow shaft 36 of the crushing descending section; secondly, the falling graphite powder is blown by the crushing blowing nozzle 35 to prevent it from adhering to the crushing impact fin 32, and at the same time, the reaction generated by the reversal of the crushing impact fin 32 The graphite powder is knocked back by the force onto the crushing L-shaped impact plate 31, and the crushing L-shaped impact plate 31 is used to achieve a head-on collision with the graphite powder; again, the graphite powder that falls after the head-on collision enters the crushing lower collection chamber 37 below, and is blown horizontally into the collecting side feed mesh 41 through the crushing feed nozzle 38; then, the recovery channel inlet 55 feeds the graphite powder that has not entered the side feed mesh 41 and falls back into the inner cavity of the crushing box 26 through the recovery channel outlet 56 for crushing;

[0060] Step 22: First, the graphite blown into the collection side feed mesh 41 is redirected downward into the collection guide channel 43 through the 45-degree collection inclined box 42; then, the graphite powder is output to the collection output skirt mesh belt 44 through the collection output skirt mesh belt 44, and the collection output skirt mesh belt 44 is mechanically vibrated by the collection eccentric lower pressure roller 46 and the eccentric upper pressure roller 45 using eccentricity, and the graphite in the mesh is pushed out by the collection belt raised roller 47 and collected by the discharge box 48; finally, the graphite powder is output through the discharge flip bottom 49, and the exhaust air is sent to the residual air outlet pipe 57 and the residual air blower 58 again into the residual air inlet pipe 59 to air-dry the graphite powder on the drying conveyor belt;

[0061] When the collecting side feeding mesh 41 is clogged, air is introduced through the reverse blowing pipe 53 to open the reverse baffle 54 to blow air in the reverse direction to the side feeding mesh 41 .

[0062] The above schemes can be used alone or in combination. The drying device 1 realizes the air-drying treatment of the graphite powder after flotation, thereby ensuring that the subsequent crushing of the graphite powder avoids adhesion, with high efficiency, high degree of automation, and cost savings. The crushing device 2 realizes the refinement of the graphite and can operate continuously to avoid the graphite powder clogging the mesh. The drying box 3 is a carrier. The drying feed port 4 is connected to the previous process. The drying supplementary hot air pipe 5 realizes the blowing of hot air to remove moisture. The drying isolation plate 6 realizes the separation of blowing and heating and drying. The drying extraction chamber 7 and the drying heating chamber 8 realize independent operation. The drying isolation channel 9 realizes the connection between the two chambers. The drying forward mesh belt 10 extracts moisture and air dries through the mesh in the drying exhaust fan 11. The drying heater 12 realizes heating and drying. The drying first return conveyor belt 13, the drying second front folding conveyor belt 14, and the drying return skirt belt 15 It is the name of different parts of the drying conveyor belt. The drying reciprocating U-shaped frame 16 can be driven by a crankshaft connecting rod. The drying rod has a raised pulling roller 17 to realize intermittent forward transmission of the conveyor belt and at the same time realize the external pushing of the graphite powder in the mesh. The external pushing is achieved by deformation. The drying pulling rotating motor 18 realizes rotational drive. The drying pulling rack 19 realizes linkage drive. The drying non-return rotating roller 20 prevents the forward conveyor belt from retreating during pulling, thereby realizing intermittent drive, thereby ensuring forward movement. The drying one-way ratchet pawl assembly 21 realizes one-way drive. The drying feed valve 22 realizes opening and closing action. The drying discharge funnel 23 realizes output.

[0063] The crushing venturi tube 24 and the crushing air inlet pipe 25 realize the entry of high-pressure airflow, which accelerates the graphite powder downward through kinetic energy. The crushing box 26 is the carrier, and the crushing wind overflow cavity 27 realizes discharge. The crushing synchronous drive gear set 29 realizes synchronous multi-group drive. The crushing upward section rotating hollow shaft 30 realizes high-speed rotation drive, and gas can be sent in to clean the fins. The fins are preferably ceramics, titanium alloys, etc. The crushing L-shaped impact plate 31 uses the inclination to make the plate surface face the direction of the graphite powder, thereby achieving a more thorough collision, crushing impact fins 32, and crushing blanking gap 33 design, thereby achieving multi-stage collision, which is reasonably designed. The crushing interval sleeve 34 and the crushing blowing nozzle 35 realize the cleaning of the fins by blowing air, and the crushing downward section rotating hollow shaft 36 realizes rotation and counter-air supply. The lower collection chamber 37 allows graphite powder to fall, the crushing air nozzle 38 allows air to be blown in to prevent mesh blockage, the collection triangle roof 40 allows graphite powder to slide out to prevent accumulation, the collection side feed mesh 41 allows air to be fed into the mesh to prevent large particles from accumulating, the 45-degree collection inclined box 42 provides guidance, the collection guide channel 43 guides the graphite powder, the collection output skirt mesh belt 44 outputs the graphite powder, and the collection eccentric upper pressure roller 45 and the collection eccentric lower pressure roller 46 are adjusted simultaneously to ensure that the conveyor belt does not deform in length during vibration, thereby increasing its service life. By adjusting the compensation length, the collection belt raised roller 47 "masses" the belt, causing the mesh to deform and open, or pushing the graphite powder out. The discharge box 48 and the discharge flip bottom 49 output the graphite powder. The upper one-way baffle 50 for collecting reduces the ventilation gap, the collecting counterweight 51 adjusts its position according to the wind force, the lower baffle 52 for collecting adjusts the ventilation gap, the reverse blowing pipe 53 and the reverse baffle 54 achieve reverse blowing to clean the mesh, the recovery channel inlet 55 and the recovery channel outlet 56 achieve multiple collisions with the graphite powder, the residual air outlet pipe 57, the residual air blower 58, and the residual air inlet pipe 59 can generate negative pressure and simultaneously discharge the airflow, thereby ensuring that other gases in the crushing box are discharged. The present invention realizes the air drying and crushing of the graphite powder, thereby achieving automation and high efficiency.

[0064] The present invention is fully described for a clearer disclosure, and the prior art is not listed one by one.

[0065] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that the technical solutions described in the above embodiments may be modified or some of the technical features may be replaced with equivalents. It is also obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pulverizing device (2) for graphite preparation, characterized in that: The invention comprises a crushing venturi tube (24) as an inlet, a crushing air inlet pipe (25) arranged on the crushing venturi tube (24), a crushing box (26) arranged below the outlet of the crushing venturi tube (24), a crushing guide top wall (28) arranged between the top of the inner cavity and the side wall of the crushing box (26), a crushing L-shaped impact plate (31) arranged at the top of the inner cavity of the crushing box (26), a crushing upper section rotating hollow shaft (30) arranged below the crushing L-shaped impact plate (31) and having a center hole for feeding gas, a crushing synchronous driving gear set (29) arranged on the crushing box (26) and driving the crushing upper section rotating hollow shaft (30) to rotate in the same direction, and crushing impact fins (32) distributed on the crushing upper section rotating hollow shaft (30). ), a pulverizing gap (33) provided between axially adjacent pulverizing impact fins (32), a pulverizing spacer sleeve (34) mounted on the pulverizing upper section rotating hollow shaft (30) and located at the pulverizing gap (33), a pulverizing air blowing nozzle (35) provided on the pulverizing spacer sleeve (34) and having its root connected to the central hole and its end nozzle spraying graphite powder into the pulverizing box (26), a pulverizing lower section rotating hollow shaft (36) provided below the pulverizing upper section rotating hollow shaft (30) and having fins for impacting graphite powder falling from the pulverizing gap (33), a collecting box (39) provided in a pulverizing lower collecting cavity (37) below the pulverizing lower section rotating hollow shaft (36), and a collecting triangle provided on the top of the collecting box (39). A roof (40), a collecting side feeding mesh (41) provided on the outer wall of the collecting box (39), a crushing feeding nozzle (38) provided on the side wall of the collecting box (39) and used for blowing the falling graphite powder horizontally into the collecting side feeding mesh (41), a 45-degree collecting inclined box (42) provided in the inner cavity of the collecting box (39) and located below the collecting triangular roof (40) and used for redirecting the graphite blown into the collecting side feeding mesh (41) downward, a collecting guide channel (43) provided between the 45-degree collecting inclined box (42) and the inner wall of the collecting box (39), a collecting output skirt mesh belt (44) with an input end provided below the collecting guide channel (43), and a lower end connected to the collecting output skirt mesh belt (44). an eccentric upper pressure roller (45) in contact with the upper surface of the output end descending section, a collecting eccentric lower pressure roller (46) in contact with the lower surface of the output end descending section of the collecting output skirt mesh belt (44), a crushing wind overflow cavity (27) arranged on one side of the inner cavity of the crushing box (26) and in which the output end of the collecting output skirt mesh belt (44) is located, a collecting belt raised roller (47) arranged at the output end of the collecting output skirt mesh belt (44) and used to push out graphite in the mesh, a discharge box (48) arranged below the output end of the collecting output skirt mesh belt (44), a discharge turning bottom surface (49) arranged below the discharge box (48), a collecting upper one-way baffle (50) arranged on the crushing box (26) and corresponding to the upward section of the collecting output skirt mesh belt (44),A collection counterweight (51) provided on the upper one-way baffle (50) and corresponding to the downward section of the collection output skirt belt (44); a collection lower baffle (52) provided on the crushing box (26); a recovery channel inlet (55) provided at the lower end of the crushing lower collection cavity (37) and used to collect graphite powder; and a recovery channel outlet (56) provided on the crushing venturi tube (24) and connected to the recovery channel inlet (55).

2. The pulverizing device (2) for graphite preparation according to claim 1, characterized in that: It also includes a reverse blowing pipe (53) provided on the 45-degree collecting inclined box body (42) and used for feeding gas, and a reverse baffle (54) provided on the lower inclined surface of the 45-degree collecting inclined box body (42) and used for one-way ventilation.

3. A pulverization method for preparing fine structure graphite, characterized in that : With the aid of the pulverizing device described in claim 1; the pulverizing method includes the following steps: first, air flow is introduced through the pulverizing air inlet pipe (25), and the graphite powder introduced in the pulverizing venturi (24) is accelerated and input into the inner cavity of the pulverizing box (26); then, the falling graphite powder hits the pulverizing impact fin (32), and the falling graphite powder is impacted for the second time by the rotating hollow shaft (36) of the pulverizing descending section; secondly, the falling graphite powder is blown at the pulverizing blowing nozzle (35) to avoid it from adhering to the pulverizing impact fin (32), and at the same time, the pulverizing impact fin (32) The reaction force generated by the reversal knocks the graphite powder in the opposite direction to the crushing L-shaped impact plate (31), and the crushing L-shaped impact plate (31) is used to achieve a head-on collision with the graphite powder; again, the graphite powder that falls after the head-on collision enters the crushing lower collection cavity (37) below, and is blown horizontally into the collecting side feed mesh (41) through the crushing air nozzle (38); then, the recovery channel inlet (55) sends the graphite powder that has not entered the side feed mesh (41) and has fallen back into the inner cavity of the crushing box (26) through the recovery channel outlet (56) for crushing.

4. The pulverizing method for preparing fine structure graphite according to claim 3, characterized in that : Step 22, first, the graphite blown into the collection side feed mesh (41) is redirected downward into the collection guide channel (43) through the forty-five-degree collection inclined box (42); then, the graphite powder is output to the collection output skirt mesh belt (44) through the collection output skirt mesh belt (44), and the collection output skirt mesh belt (44) is mechanically vibrated by the eccentric lower pressure roller (46) and the eccentric upper pressure roller (45) using the eccentricity, and the graphite in the mesh is pushed out by the collection belt raised roller (47) and collected through the discharge box (48).

5. The pulverizing method for preparing fine structure graphite according to claim 4, characterized in that When the collecting side feeding mesh (41) is clogged, the reverse baffle (54) is opened to blow air in the reverse direction toward the side feeding mesh (41) through the reverse blowing pipe (53).

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