CN115770657A - Preparation method and crushing device of coarse-particle boron carbide powder with high sphericity - Google Patents
Preparation method and crushing device of coarse-particle boron carbide powder with high sphericity Download PDFInfo
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- CN115770657A CN115770657A CN202211519528.0A CN202211519528A CN115770657A CN 115770657 A CN115770657 A CN 115770657A CN 202211519528 A CN202211519528 A CN 202211519528A CN 115770657 A CN115770657 A CN 115770657A
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- 229910052580 B4C Inorganic materials 0.000 title claims abstract description 85
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000000843 powder Substances 0.000 title claims abstract description 45
- 239000011362 coarse particle Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 70
- 238000000227 grinding Methods 0.000 claims abstract description 54
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000001704 evaporation Methods 0.000 claims abstract description 20
- 230000008020 evaporation Effects 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000713 high-energy ball milling Methods 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 238000002161 passivation Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims description 45
- 238000009826 distribution Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 206010024796 Logorrhoea Diseases 0.000 claims 1
- 238000012546 transfer Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to a preparation method and a crushing device of coarse-grained boron carbide powder with high sphericity, which comprises the following steps: s1, crushing coarse-particle boron carbide powder by using a crushing device; s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying; s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying; and S4, performing autogenous grinding on the powder crushed by the jet mill by using autogenous grinding equipment at the temperature of over 600 ℃ in an oxygen-rich environment to realize surface physical grinding passivation. The transmission belt is arranged at the rear side of the crushing device main body, power transmission can be realized through four groups of transmission wheels, the grinding balls rotate relatively by utilizing two groups of gears, the crushed boron carbide can be ground for the second time, the distance between the grinding balls can be adjusted by adjusting the positions of the first transmission wheel and the second transmission wheel, and the diameter of the crushed particles can be adjusted according to requirements.
Description
Technical Field
The invention relates to the technical field of preparation of coarse-particle boron carbide powder, in particular to a preparation method and a crushing device of high-sphericity coarse-particle boron carbide powder.
Background
The boron carbide has the characteristics of low density, high strength, high-temperature stability and good chemical stability. When the boron carbide powder is used in wear-resistant materials and ceramic reinforced phases, particularly light armors, reactor neutron absorbers and the like, in order to increase the contact area between raw materials, boron carbide is firstly put into a crushing device for crushing, so that the reaction rate can be improved.
Through retrieval, the crushing device for boron carbide production disclosed in the publication number CN210386142U comprises a crushing mechanism, a grinding mechanism and a screening mechanism, wherein the crushing mechanism is arranged at the upper end of the grinding mechanism, at least 2 crushing shafts are arranged in the crushing mechanism, crushing arms are uniformly arranged on the crushing shafts, the crushing arms on adjacent crushing shafts are arranged in a staggered manner, and a discharge port of the crushing mechanism is in an inverted cone shape; the utility model discloses a crushing mechanism, including grinding mechanism, sieve mechanism, movable mechanism, mill mechanism includes two sets of pairs of rollers, be provided with lambda shape baffle between two sets of pairs of rollers, lambda shape baffle is located broken mechanism discharge gate under, divide sieve mechanism to set up the lower extreme at grinding mechanism, divide sieve mechanism to include two screen cloths of connecting through movable mechanism, the screen cloth passes through the elastic component and divides the interior wall connection of sieve mechanism, movable mechanism sets up the below at lambda shape baffle. This breaker novel structure, reasonable in design, the crushing effect of material is better, can smash into even powder, and the practicality is strong. (ESM) the same invention creation has been patented on the same day.
However, some existing crushing devices can rapidly crush boron carbide into powder, but the size of the crushed boron carbide cannot be adjusted according to needs, and therefore, a preparation method of coarse-particle boron carbide powder with high sphericity is provided.
Disclosure of Invention
The invention aims to provide a preparation method of coarse-particle boron carbide powder with high sphericity, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of coarse-grain boron carbide powder with high sphericity comprises the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying;
s4, performing autogenous grinding on the powder crushed by the jet mill by using autogenous grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the particle surface, and then carrying out flash evaporation drying.
The crushing device comprises a crushing device main body, and a pretreatment mechanism and a crushing adjusting mechanism which are positioned in the crushing device main body;
pretreatment mechanism includes that the broken dish is one section, one section below of broken dish is fixed with the broken dish two-section, one section top of broken dish is provided with the bracing piece, and one section top of broken dish installs the first break motor, pretreatment mechanism's below is provided with reposition of redundant personnel mechanism, the bottom of breaker main part is provided with the discharge gate.
Preferably, the flow dividing mechanism comprises a material guide plate, a flow dividing spring and a rotating shaft are arranged on the material guide plate, and the flow dividing spring and the rotating shaft are arranged between the flow dividing plate and the material guide plate.
Preferably, the flow distribution plate slides on the material guide plate through a rotating shaft, and the flow distribution plate is elastically connected with the material guide plate through a flow distribution spring.
Preferably, broken adjustment mechanism includes the conveyer belt, the inside from left to right side range of conveyer belt is provided with transfer gear one, transfer gear four and transfer gear two, and one side of conveyer belt is provided with transfer gear three, the conveying motor is installed to the input of transfer gear one, the transmission box is installed to the output of transfer gear two.
Preferably, the internally mounted of transmission box has the driving gear, and one side of driving gear is provided with driven gear, the grinding ball is all installed to the output of driven gear and transfer gear one, electric putter is all installed to one side of transmission box and transfer motor, horizontal relative movement is realized through electric putter in one side of breaker main part to transmission box and transfer motor.
Preferably, the front ends of the fourth conveying wheel and the third conveying wheel are provided with screw rod transmission parts, two groups of connecting rods are arranged between the screw rod transmission parts, a lifting screw rod penetrates through the inside of the screw rod transmission part, a screw rod motor is installed at the input end of the lifting screw rod, and the fourth conveying wheel and the third conveying wheel realize synchronous lifting movement on the lifting screw rod through the screw rod transmission parts.
Preferably, the driving gear is in meshed connection with the driven gear.
A preparation method of coarse-particle boron carbide powder with high sphericity comprises the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s11, putting boron carbide blocks into a crushing device main body, starting a primary crushing motor to drive a crushing disc to rotate, enabling a supporting rod on the crushing disc to rotate in the crushing device main body, wherein due to the fact that the gradient of a second section of the crushing disc on the crushing disc is different from that of a first section of the crushing disc, boron carbide firstly contacts with the inner wall of the crushing device main body to be extruded and crushed, the boron carbide on the top can move downwards, the boron carbide is extruded mutually, and rapid crushing can be achieved;
s12, moving the crushed boron carbide to a flow distribution plate along a material guide plate, stretching a flow distribution spring along with the increase of the boron carbide, enabling the flow distribution plate to rotate and fall to a grinding ball, and grinding the boron carbide by relative rotation of the grinding ball;
s13, when the diameter of the crushed particles needs to be adjusted, the electric push rod can be started to stretch, and the transmission box and the transmission motor move on the crushing device main body;
s14, when the distance between the grinding balls is increased, the screw rod motor drives the lifting screw rod to rotate, so that the third conveying wheel and the fourth conveying wheel move upwards, otherwise, the third conveying wheel and the fourth conveying wheel move downwards, the adjustment is carried out by matching the positions of the first conveying wheel and the second conveying wheel, and the ground boron carbide is discharged through a discharge hole at the bottom;
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying;
s4, performing autogenous grinding on the powder crushed by the jet mill by using autogenous grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the particle surface, and then carrying out flash evaporation drying.
The above description shows that, with the above technical solutions of the present application, the technical problems to be solved by the present application can be solved.
Meanwhile, through the technical scheme, the invention at least has the following beneficial effects:
the transmission belt is arranged at the rear side of the crushing device main body, power transmission can be realized through four groups of transmission wheels, relative rotation of grinding balls is realized through two groups of gears, the crushed boron carbide can be ground for the second time, the distance between the grinding balls can be adjusted through the position adjustment of the first transmission wheel and the second transmission wheel, and the diameter of crushed particles can be adjusted according to requirements;
according to the invention, the boron carbide can be pretreated through the crushing disc on the pretreatment mechanism, and because the slopes of the second section of the crushing disc and the first section of the crushing disc on the crushing disc are different, the downward moving speed also changes, when the crushing disc rotates, the boron carbide is firstly contacted with the inner wall of the crushing device main body to be extruded and crushed, the boron carbide at the top moves downwards, and the boron carbide is also extruded mutually, so that the rapid crushing can be realized, and the subsequent grinding of the boron carbide is convenient;
in order to avoid simultaneously pouring a large amount of boron carbide into the crushing adjusting mechanism, the splitter plate is arranged on the material guide plate through the splitter spring, and the splitter plate can be pressed to feed the boron carbide only when the weight of the boron carbide reaches a certain weight, so that the boron carbide is ground in batches.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the crushing adjustment mechanism of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;
fig. 4 is a schematic structural diagram of the transmission box of the invention.
In the figure: 1. a crushing device main body; 2. grinding balls; 3. a discharge port; 4. a material guide plate; 5. a flow distribution plate; 6. a second section of a crushing disc; 7. crushing a first section of the disc; 8. a support bar; 9. primarily crushing the motor; 10. a first transmission wheel; 11. a transfer motor; 12. a lifting screw rod; 13. a conveyor belt; 14. a second conveying wheel; 15. a third conveying wheel; 16. a screw rod transmission part; 17. a fourth conveying wheel; 18. a screw motor; 19. a connecting rod; 20. a rotating shaft; 21. a shunt spring; 22. a driving gear; 23. a transmission box; 24. a driven gear; 25. an electric push rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention provides a technical scheme that: a preparation method of coarse-grain boron carbide powder with high sphericity comprises the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying;
s4, performing autogenous grinding on the powder crushed by the jet mill by using autogenous grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the surface of the particles, and then carrying out flash evaporation drying.
As shown in fig. 1 and 2, the crushing device comprises a crushing device main body 1, and a pretreatment mechanism and a crushing adjustment mechanism which are arranged in the crushing device main body 1;
pretreatment mechanism includes one section 7 of broken disc, the below of one section 7 of broken disc is fixed with broken disc two-stage process 6, the top of one section 7 of broken disc is provided with bracing piece 8, and just broken disc is installed at the top of one section 7 of broken disc and is just broken motor 9, the below of pretreatment mechanism is provided with reposition of redundant personnel mechanism, the bottom of breaker main part 1 is provided with discharge gate 3, just broken motor 9 can drive the broken disc and rotate, bracing piece 8 in breaker main part 1 internal rotation on the broken disc, because broken disc two-stage process 6 and one section 7 slopes of broken disc are different on the broken disc, boron carbide is at first extrudeed the breakage with 1 inner wall of breaker main part mutual contact, and the boron carbide at top can the downstream, also extrude each other between the boron carbide, can realize quick breakage.
Example two
The scheme in the first embodiment is further described in the following with reference to specific working modes, which are described in detail in the following:
as shown in fig. 1 and 3, as a preferred embodiment, in addition to the above-mentioned manner, the flow dividing mechanism includes a material guiding plate 4, a flow dividing plate 5 is disposed on the material guiding plate 4, and a flow dividing spring 21 and a rotating shaft 20 are installed between the flow dividing plate 5 and the material guiding plate 4, the flow dividing plate 5 slides on the material guiding plate 4 through the rotating shaft 20, and the flow dividing plate 5 is elastically connected to the material guiding plate 4 through the flow dividing spring 21, the broken boron carbide moves to the flow dividing plate 5 along the material guiding plate 4, and as the boron carbide increases, the flow dividing spring 21 stretches, so that the flow dividing plate 5 rotates and falls to the grinding ball 2.
As shown in fig. 2 and 4, as a preferred embodiment, on the basis of the above-mentioned manner, further, the crushing adjustment mechanism includes a conveyor belt 13, a first conveyor wheel 10, a fourth conveyor wheel 17 and a second conveyor wheel 14 are arranged inside the conveyor belt 13 from left to right, a third conveyor wheel 15 is arranged on one side of the conveyor belt 13, a conveyor motor 11 is installed at an input end of the first conveyor wheel 10, a transmission box 23 is installed at an output end of the second conveyor wheel 14, a driving gear 22 is installed inside the transmission box 23, a driven gear 24 is installed on one side of the driving gear 22, the driving gear 22 is engaged with the driven gear 24, grinding balls 2 are installed at output ends of the driven gear 24 and the first conveyor wheel 10, electric push rods 25 are installed at one sides of the transmission box 23 and the conveyor motor 11, the transmission box 23 and the conveyor motor 11 realize lateral relative movement on one side of the crushing device main body 1 through the electric push rods 25, front ends of the fourth conveyor wheel 17 and the third conveyor wheel 15 are provided with transmission pieces 16, two sets of transmission pieces 16 are installed between the transmission pieces 16, and the lifting screw rod transmission pieces 16 penetrate through the lifting screw rod transmission pieces 12, the lifting screw rod 12 and the transmission piece 16 to realize synchronous movement of the transmission box 16, when the lifting screw rod transmission box 16 and the lifting screw rod transmission piece 16 and the lifting screw rod transmission box 16 move up and the lifting screw rod 14, the lifting screw rod transmission device to realize synchronous movement, when the lifting screw rod transmission piece 14 move the lifting screw rod transmission device 1, the lifting screw rod transmission device 14, the lifting screw rod transmission device moves up and the lifting screw rod transmission device to increase the lifting screw rod transmission device, and the lifting screw rod transmission piece 14.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a method for preparing coarse boron carbide powder with high sphericity specifically includes the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s11, putting boron carbide blocks into the crushing device main body 1, starting the primary crushing motor 9 to drive the crushing disc to rotate, enabling the supporting rod 8 on the crushing disc to rotate in the crushing device main body 1, enabling boron carbide to be in mutual contact with the inner wall of the crushing device main body 1 to be extruded and crushed due to the fact that the slopes of the two sections 6 of the crushing disc and the slopes of the two sections 7 of the crushing disc are different, enabling the boron carbide at the top to move downwards and be extruded mutually, and achieving rapid crushing;
s12, moving the crushed boron carbide to the flow distribution plate 5 along the material guide plate 4, stretching the flow distribution spring 21 with the increase of the boron carbide, enabling the flow distribution plate 5 to rotate and fall to the grinding balls 2, and grinding the boron carbide by relative rotation of the grinding balls 2;
s13, when the diameter of the crushed particles needs to be adjusted, the electric push rod 25 can be started to stretch, and the transmission box 23 and the transmission motor 11 move on the crushing device main body 1;
s14, when the distance between the grinding balls 2 is increased, the screw rod motor 18 drives the lifting screw rod 12 to rotate, so that the third conveying wheel 15 and the fourth conveying wheel 17 move upwards, otherwise, the conveying wheels move downwards, the positions of the first conveying wheel 10 and the second conveying wheel 14 are matched for adjustment, and the ground boron carbide is discharged through the bottom discharge port 3;
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying;
s4, performing self-grinding on the powder crushed by the jet mill by using self-grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the particle surface, and then carrying out flash evaporation drying.
The comprehensive results show that:
the invention aims at the technical problems that: the existing crushing devices can rapidly crush boron carbide into powder, but cannot adjust the size of the crushed boron carbide according to the requirement; the technical scheme of each embodiment is adopted. Meanwhile, the implementation process of the technical scheme is as follows:
the method comprises the steps that boron carbide blocks are thrown into a crushing device main body 1, a primary crushing motor 9 is started to drive a crushing disc to rotate, a supporting rod 8 on the crushing disc rotates in the crushing device main body 1, due to the fact that the slopes of a second section 6 of the crushing disc and a first section 7 of the crushing disc are different, boron carbide firstly contacts with the inner wall of the crushing device main body 1 to be extruded and crushed, boron carbide on the top can move downwards, the boron carbide on the top can also be extruded mutually, rapid crushing can be achieved, the boron carbide can be conveniently ground subsequently, the crushed boron carbide moves to a flow distribution plate 5 along a guide plate 4, a flow distribution spring 21 stretches along with the increase of the boron carbide, the flow distribution plate 5 rotates and falls to a grinding ball 2, the boron carbide is ground through relative rotation of the grinding ball 2, when the diameter of crushed particles needs to be adjusted, an electric push rod 25 can be started to stretch and retract, a transmission box 23 and a transmission motor 11 move on the crushing device main body 1, when the distance of the grinding ball 2 is increased, a lead screw motor 18 drives a lifting lead screw 12 to rotate, a third transmission wheel 15 and a fourth transmission wheel 17 move upwards, otherwise, the transmission wheel 10 and a second transmission wheel 14 are matched with the adjustment, the bottom of the grinding wheel 3, and the discharge port is ground;
through the setting, above-mentioned technical problem can certainly be solved in this application, simultaneously, realize following technological effect:
the transmission belt 13 is arranged at the rear side of the crushing device main body 1, power transmission can be realized through four groups of transmission wheels, the grinding balls 2 can rotate relatively by two groups of gears, the crushed boron carbide can be ground for the second time, the distance between the grinding balls 2 can be adjusted by adjusting the positions of the first transmission wheel 10 and the second transmission wheel 14, and the diameter of crushed particles can be adjusted according to requirements;
according to the invention, boron carbide can be pretreated through the crushing disc on the pretreatment mechanism, as the slopes of the two sections 6 and the first section 7 of the crushing disc on the crushing disc are different, the downward moving speed is also changed, when the crushing disc rotates, boron carbide is firstly contacted with the inner wall of the crushing device main body 1 to be extruded and crushed, the boron carbide at the top moves downwards, and the boron carbide is also extruded mutually, so that the rapid crushing can be realized, and the subsequent grinding of the boron carbide is convenient;
in order to avoid that a large amount of boron carbide simultaneously flows into the crushing adjusting mechanism, the flow distribution plate 5 is arranged on the material guide plate 4 through the flow distribution spring 21, and the flow distribution plate 5 can be pressed to feed the boron carbide only when the weight of the boron carbide reaches a certain weight, so that the boron carbide is ground in batches.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A preparation method of coarse-particle boron carbide powder with high sphericity is characterized by comprising the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation and drying;
s4, performing self-grinding on the powder crushed by the jet mill by using self-grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the surface of the particles, and then carrying out flash evaporation drying.
2. The crushing device according to claim 1, characterized by comprising a crushing device body (1), and a pretreatment mechanism and a crushing adjustment mechanism located in the crushing device body (1);
pretreatment mechanism includes one section (7) of broken dish, the below of one section (7) of broken dish is fixed with broken dish two-section (6), the top of one section (7) of broken dish is provided with bracing piece (8), and the top of one section (7) of broken dish installs first garrulous motor (9), pretreatment mechanism's below is provided with reposition of redundant personnel mechanism, the bottom of breaker main part (1) is provided with discharge gate (3).
3. The crushing device according to claim 1, wherein the diversion mechanism comprises a guide plate (4), a diversion plate (5) is arranged on the guide plate (4), and a diversion spring (21) and a rotating shaft (20) are arranged between the diversion plate (5) and the guide plate (4).
4. The crushing device according to claim 2, characterized in that the splitter plate (5) is slid on the guide plate (4) by means of a spindle (20), and the splitter plate (5) is resiliently connected to the guide plate (4) by means of a splitter spring (21).
5. The crushing device according to claim 1, characterized in that the crushing adjusting mechanism comprises a conveyor belt (13), a first conveyor wheel (10), a fourth conveyor wheel (17) and a second conveyor wheel (14) are arranged inside the conveyor belt (13) from left to right, a third conveyor wheel (15) is arranged on one side of the conveyor belt (13), a conveyor motor (11) is installed at the input end of the first conveyor wheel (10), and a transmission box (23) is installed at the output end of the second conveyor wheel (14).
6. The crushing device according to claim 4, characterized in that a driving gear (22) is installed inside the transmission box (23), a driven gear (24) is arranged on one side of the driving gear (22), grinding balls (2) are installed at the output ends of the driven gear (24) and the first transmission wheel (10), an electric push rod (25) is installed on one sides of the transmission box (23) and the first transmission wheel (11), and the transmission box (23) and the first transmission wheel (11) are transversely moved relative to each other on one side of the crushing device main body (1) through the electric push rod (25).
7. The crushing device according to claim 4, characterized in that the front ends of the four (17) and three (15) transmission wheels are provided with screw drives (16), an engaging rod (19) is arranged between the two sets of screw drives (16), a lifting screw (12) is arranged in the screw drives (16), a screw motor (18) is arranged at the input end of the lifting screw (12), and the four (17) and three (15) transmission wheels realize synchronous lifting movement on the lifting screw (12) through the screw drives (16).
8. A crushing device according to claim 5, characterized in that the driving gear (22) is in meshed connection with a driven gear (24).
9. The preparation method for preparing coarse boron carbide powder with high sphericity by using the crushing device according to any one of claims 1 to 7, comprising the following steps:
s1, crushing coarse-particle boron carbide powder by using a crushing device;
s11, putting boron carbide blocks into a crushing device main body (1), starting a primary crushing motor (9) to drive a crushing disc to rotate, enabling a support rod (8) on the crushing disc to rotate in the crushing device main body (1), wherein due to the fact that the slopes of a second section (6) of the crushing disc and a first section (7) of the crushing disc on the crushing disc are different, boron carbide firstly contacts with the inner wall of the crushing device main body (1) to be extruded and crushed, boron carbide on the top can move downwards, the boron carbide is also extruded mutually, and rapid crushing can be achieved;
s12, moving the crushed boron carbide to a flow distribution plate (5) along a material guide plate (4), stretching a flow distribution spring (21) along with the increase of the boron carbide, enabling the flow distribution plate (5) to rotate, enabling the flow distribution plate to fall to a grinding ball (2), and grinding the boron carbide through relative rotation of the grinding ball (2);
s13, when the diameter of the crushed particles needs to be adjusted, the electric push rod (25) can be started to stretch, and the transmission box (23) and the transmission motor (11) move on the crushing device main body (1);
s14, when the distance between the grinding balls (2) is increased, the screw rod motor (18) drives the lifting screw rod (12) to rotate, so that the third conveying wheel (15) and the fourth conveying wheel (17) move upwards, otherwise, the conveying wheels move downwards, the positions of the first conveying wheel (10) and the second conveying wheel (14) are matched for adjustment, and the ground boron carbide is discharged through the bottom discharge hole (3);
s2, carrying out high-energy ball milling on the crushed powder and carrying out flash evaporation drying;
s3, carrying out jet mill crushing and grading on the powder after flash evaporation drying;
s4, performing autogenous grinding on the powder crushed by the jet mill by using autogenous grinding equipment at the temperature of over 600 ℃ in an oxygen-enriched environment to realize surface physical grinding passivation;
and S5, after the surface treatment is finished, carrying out acid washing treatment to remove an oxide layer on the particle surface, and then carrying out flash evaporation drying.
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| CN111995401A (en) * | 2020-09-04 | 2020-11-27 | 牡丹江金钢钻碳化硼有限公司 | Preparation method of superfine boron carbide powder |
| CN112169984A (en) * | 2020-10-29 | 2021-01-05 | 禹州市神后镇孔家钧窑有限公司 | Raw material coarse crushing device for jun porcelain production |
| CN112473862A (en) * | 2020-11-13 | 2021-03-12 | 湖南连心科技有限公司 | Powder coating processing crocus system |
| CN212791114U (en) * | 2020-06-23 | 2021-03-26 | 沁阳金隅冀东环保科技有限公司 | A lime stone breaker for cement manufacture |
| CN212943254U (en) * | 2020-04-15 | 2021-04-13 | 高飞 | Screening plant for livestock feed |
| CN215743908U (en) * | 2021-02-22 | 2022-02-08 | 江西思乡农业有限公司 | Grinding device of sealwort |
| CN217298517U (en) * | 2022-02-23 | 2022-08-26 | 深圳市绿城建筑有限公司 | High-efficient processingequipment of pitch raw materials of usefulness is maintained to town road |
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2022
- 2022-11-30 CN CN202211519528.0A patent/CN115770657A/en active Pending
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| US5521016A (en) * | 1992-07-17 | 1996-05-28 | The Dow Chemical Company | Light weight boron carbide/aluminum cermets |
| CN208730040U (en) * | 2018-07-30 | 2019-04-12 | 成都亿洲塑料制品有限公司 | One kind being used for particle mixing blender for plastic production |
| CN210058410U (en) * | 2019-05-20 | 2020-02-14 | 广西理工职业技术学校 | Grinding device for industrial chemicals convenient to clearance |
| CN212943254U (en) * | 2020-04-15 | 2021-04-13 | 高飞 | Screening plant for livestock feed |
| CN212791114U (en) * | 2020-06-23 | 2021-03-26 | 沁阳金隅冀东环保科技有限公司 | A lime stone breaker for cement manufacture |
| CN111995401A (en) * | 2020-09-04 | 2020-11-27 | 牡丹江金钢钻碳化硼有限公司 | Preparation method of superfine boron carbide powder |
| CN112169984A (en) * | 2020-10-29 | 2021-01-05 | 禹州市神后镇孔家钧窑有限公司 | Raw material coarse crushing device for jun porcelain production |
| CN112473862A (en) * | 2020-11-13 | 2021-03-12 | 湖南连心科技有限公司 | Powder coating processing crocus system |
| CN215743908U (en) * | 2021-02-22 | 2022-02-08 | 江西思乡农业有限公司 | Grinding device of sealwort |
| CN217298517U (en) * | 2022-02-23 | 2022-08-26 | 深圳市绿城建筑有限公司 | High-efficient processingequipment of pitch raw materials of usefulness is maintained to town road |
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