CN111701664A

CN111701664A - Crushing device for manufacturing environment-friendly bricks and using method thereof

Info

Publication number: CN111701664A
Application number: CN202010570949.0A
Authority: CN
Inventors: 谢召奇
Original assignee: Yiyang Xincheng Energy Saving And Environmental Protection Technology Co ltd
Current assignee: Yiyang Xincheng Energy Saving And Environmental Protection Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-09-25

Abstract

The invention discloses a crushing device for manufacturing environment-friendly bricks and a using method thereof. This reducing mechanism is used in environmental protection brick preparation and application method smashes cubic material through breaker, smash the material of fritter through two synchronous coupling round pin axles of mutual coupling, compare in conventional grinder, the grinding head quality is littleer, equipment vibration range is littleer, collect the conveying through the unqualified material of sieving mechanism cooperation bucket wheel lifting machine and carry out the grinding process again, granule size qualification rate and even degree have been promoted, make things convenient for fragment of brick preparation to compare the compounding, the shaping effect is better, intensity is higher. This has solved the broken granule of current environmental protection brick production reducing mechanism raw materials uneven in size, leads to the not good problem of product later stage shaping effect and quality.

Description

Crushing device for manufacturing environment-friendly bricks and using method thereof

Technical Field

The invention relates to the field of civil engineering substrate production equipment, in particular to a crushing device for manufacturing an environment-friendly brick and a using method thereof.

Background

The novel wall material which is manufactured by using fly ash, coal cinder, coal gangue, tailing slag, chemical slag or natural sand, tidal marsh mud, industrial waste, waste incineration slag and the like (one or more than one of the raw materials) as main raw materials without high-temperature calcination is called as an environment-friendly brick.

The existing environment-friendly brick can not well crush raw materials in the manufacturing process, the raw material particles participating in mixing and proportioning are uneven in size, the brick is irregular in molding after being poured into a mold, the density is uneven, and the brick is easy to break so that the quality of the brick is poor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a crushing device for manufacturing environment-friendly bricks and a using method thereof, and solves the problems of poor later-stage forming effect and quality of products caused by uneven size of raw material crushed particles of the crushing device for producing the environment-friendly bricks.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a reducing mechanism is used in environmental protection brick preparation, includes the casing, the top fixedly connected with breaker of casing, breaker's middle part side surface fixedly connected with inlet pipe, breaker's first-order discharging pipe of output fixedly connected with, first-order discharging pipe fixed connection be in shells inner wall's top, the middle part fixedly connected with grinder of the inner wall of casing, the bottom opening of first-order discharging pipe is just right grinder's top, grinder's below is provided with the sieving mechanism, sieving mechanism swing joint be in the inside of casing.

The right side fixedly connected with bucket wheel lifting machine of casing, sieving mechanism's bottom with the input swing joint of bucket wheel lifting machine, the output of bucket wheel lifting machine with first-order discharging pipe fixed connection communicates with each other, shells inner wall's bottom fixedly connected with slope panel, the slope panel sets up sieving mechanism's below, the left bottom fixedly connected with second order discharging pipe of casing, the inboard end of second order discharging pipe with the bottom fixed connection of slope panel.

Preferably, the crushing device comprises a crushing bin and a sweeping bin, the crushing bin is fixedly connected and communicated with the sweeping bin, and the sweeping bin is fixedly connected to the top of the shell.

The top fixedly connected with crushing motor in broken storehouse, the spindle of crushing motor runs through broken storehouse and extend to its inside, the spindle of crushing motor passes through shaft coupling fixedly connected with crushing pole, the fixed surface of crushing pole has cup jointed broken dish, the outer edge swing joint of broken dish has the tup.

The bottom downwardly extending of broken pole dial the inboard of sweeping the storehouse and rather than the bottom surface swivelling joint of inner wall, the pole is swept to week side fixedly connected with of the bottom of broken pole.

The stirring and sweeping bin is in a round cake shape, a straight pipe is fixedly connected to one side of the front face of the stirring and sweeping bin along a tangent line, and the bottom surface of the outer side of the straight pipe is fixedly connected and communicated with the top end of the first-order discharge pipe.

Preferably, the shaft centers of the poking and sweeping bin and the crushing bin are collinear, and the diameter of the poking and sweeping bin is 1.2 times of that of the crushing bin.

Preferably, the grinding device comprises two driving shells, the two driving shells are respectively and fixedly connected to the left side and the right side of the inner wall of the shell, a driving rod is rotatably connected to the inner side of the driving shell, the driving rod penetrates through the back side of the shell and extends to the outside of the shell, a driving bevel gear is fixedly sleeved at the front end of the driving rod, a driven bevel gear is meshed to the side surface of the driving bevel gear, a driven rod is fixedly sleeved at the axis of the driven bevel gear, the two driven rods are respectively and rotatably connected to the opposite side of the driving shell and penetrate through the outside of the driving shell, a coupling pin shaft is fixedly connected to the opposite end of each driven rod, and the surfaces of the coupling pin shafts are mutually abutted and movably connected.

Preferably, the back end of the driving rod is fixedly sleeved with a driving wheel, the two driving wheels are in transmission connection, the back end of the driving rod on the left side is fixedly connected with a grinding motor through a coupler, and the grinding motor is fixedly connected to the back of the shell.

Preferably, the screening device includes the rotor plate, the fixed grafting in axle center of rotor plate has the screening axostylus axostyle, screening axostylus axostyle swivelling joint be in the back of the inner wall of casing, the centrifugal position of rotor plate articulates there is the gangbar, the one end fixedly connected with screening box of gangbar, the bottom of screening box is inlayed and is had the screen cloth, the one end fixedly connected with connecting rod of keeping away from of screening box the gangbar, the input fixedly connected with hopper of bucket wheel lifting machine, the connecting rod articulates one side of hopper inner wall.

Preferably, the back end of the screening shaft lever is fixedly connected with a screening motor through a coupler, and the screening motor is fixedly connected to the back of the shell.

The use method of the crushing device for manufacturing the environment-friendly bricks comprises the following steps:

s1, starting the bucket wheel elevator, the screening motor, the grinding motor and the crushing motor from top to bottom in sequence, and feeding materials into the feeding pipe.

S2, the hammer head and the centrifugal force generated by rotation of the crushing disc start to extend outwards, the materials entering from the feeding pipe are crushed and crushed into smaller blocks, small materials fall into the stirring and sweeping bin and are pushed to the straight pipe by rotation of the stirring and sweeping rod, and the small materials enter the first-order discharging pipe and fall to the upper side of the grinding device along the inclined plane of the first-order discharging pipe.

And S3, enabling the small materials to fall to the surfaces of the two coupling pin shafts from the first-order discharge pipe for grinding, grinding the materials into particles with uniform sizes, and enabling the particles to fall to the surface of the screening device through gaps between the coupling pin shafts.

S4, the granular materials falling to the surface of the screen mesh are subjected to reciprocating vibration deflection through the hinged point of the connecting rod and the hopper along the rotation action of the rotating plate, the granules meeting the size of the screen mesh fall and are conveyed to the second-order discharging pipe along the slope panel to be discharged, the granules not meeting the size fall to the inner side of the hopper along the inclination trend of the screen mesh, and the granules are lifted to the first-order discharging pipe through the bucket wheel lifter to repeatedly fall and grind the granules until the granules meet the size of the granules to be discharged.

Advantageous effects

The invention provides a crushing device for manufacturing an environment-friendly brick and a using method thereof. Compared with the prior art, the method has the following beneficial effects:

(1) this reducing mechanism is used in environmental protection brick preparation and application method smashes cubic material at first through breaker, smashes it into less cubic material and has reduced the bearing capacity demand to back grinder, and the kibbling process of grinding is participated in more easily to less cubic material simultaneously, is difficult to cause the fish tail to coupling pin axle surface to be difficult to block up the clearance between the coupling pin axle, crushing effect is better.

(2) This reducing mechanism for environmental protection brick preparation and application method grind the material of fritter through two synchronous coupling round pin axles of mutual coupling and smash, compare in conventional grinder, the grinding head quality is littleer, equipment vibration range is littleer, the helical shape that utilizes coupling round pin axle makes things convenient for the fritter material more between two coupling round pin axles, the volume reduction, run through the advancing, it is better to fritter material grinding crushing effect, the material granule size after the grinding is more even, make things convenient for the ratio compounding of later stage fragment of brick preparation, the shaping effect of fragment of brick after the shaping is better, fragment of brick intensity after the shaping is higher.

(3) This reducing mechanism is used in environmental protection brick preparation and application method thereof collects the conveying and carries out the process of grinding again through sieving mechanism cooperation bucket wheel lifting machine to the material that does not conform to the particle size after grinding, has further strengthened the particle size qualification rate and the even degree of particle size of ejection of compact raw materials, has promoted the holistic comminuted effect of device.

Drawings

FIG. 1 is a front cross-sectional view of the structure of the present invention;

FIG. 2 is a rear view of the structure of the present invention;

fig. 3 is a side view of a coupling pin of the present invention.

In the figure: 1. a housing; 2. a crushing device; 201. a crushing bin; 202. poking and sweeping the bin; 203. a crushing motor; 204. a breaking bar; 205. a crushing disc; 206. a hammer head; 207. a sweeping rod is poked; 208. a straight pipe; 3. a feed pipe; 4. a first-order discharge pipe; 5. a grinding device; 501. a drive case; 502. a driving lever; 503. a drive bevel gear; 504. a driven bevel gear; 505. a driven lever; 506. coupling a pin shaft; 507. a driving wheel; 508. grinding the motor; 6. a screening device; 601. a rotating plate; 602. screening the shaft lever; 603. a linkage rod; 604. a screening cassette; 605. screening a screen; 606. a connecting rod; 607. a hopper; 608. screening motors; 7. a bucket-wheel belt conveyor; 8. a slope panel; 9. a second-order discharge pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1-3, a crushing device for manufacturing environmental protection bricks, comprising a housing 1, a crushing device 2 fixedly connected to the top of the housing 1, a feeding pipe 3 fixedly connected to the side surface of the middle part of the crushing device 2, a first-order discharging pipe 4 fixedly connected to the output end of the crushing device 2, the first-order discharging pipe 4 fixedly connected to the top of the inner wall of the housing 1, a grinding device 5 fixedly connected to the middle part of the inner wall of the housing 1, the bottom end opening of the first-order discharging pipe 4 is aligned to the top of the grinding device 5, a screening device 6 is arranged below the grinding device 5, and the screening device 6 is movably connected to. It should be noted that the first-order discharging pipe 4 is arranged in an inclined manner, an inclination angle between the first-order discharging pipe 4 and the horizontal plane is 15-23 degrees, the top surface and the right side surface of the top end of the first-order discharging pipe 4 are fixedly connected and communicated with the bottom end of the straight pipe 208 and the output end of the bucket-wheel elevator 7 respectively, a rubber baffle is fixedly connected to the top end of the first-order discharging pipe 4, and the rubber baffle is used for cutting and blocking the output material of the bucket-wheel elevator 7 and the blanking of the straight pipe 208, so that the blanking of the straight pipe.

Casing 1's right side fixedly connected with bucket wheel lifting machine 7, the bottom of sieving mechanism 6 and the input swing joint of bucket wheel lifting machine 7, the output of bucket wheel lifting machine 7 and first-order discharging pipe 4 fixed connection and communicate with each other, the bottom fixedly connected with slope panel 8 of casing 1 inner wall, slope panel 8 sets up in the below of sieving mechanism 6, casing 1's left bottom fixedly connected with second order discharging pipe 9, the inboard end of second order discharging pipe 9 and slope panel 8's bottom fixed connection.

In the invention, the crushing device 2 comprises a crushing bin 201 and a sweeping bin 202, wherein the crushing bin 201 is fixedly connected and communicated with the sweeping bin 202, and the sweeping bin 202 is fixedly connected to the top of the shell 1.

The top fixedly connected with crushing motor 203 of broken storehouse 201, the bent shaft of crushing motor 203 runs through broken storehouse 201 and extends to its inside, and the bent shaft of crushing motor 203 passes through shaft coupling fixedly connected with crushing pole 204, and the fixed surface of crushing pole 204 has cup jointed crushing dish 205, and the outer edge swing joint of crushing dish 205 has tup 206.

The bottom end of the crushing rod 204 extends downwards to the inner side of the sweeping bin 202 and is rotatably connected with the bottom surface of the inner wall of the sweeping bin, and the sweeping rod 207 is fixedly connected with the periphery of the bottom end of the crushing rod 204. It should be noted that the end of the outer end of the sweeping rod 207 should be as close to the inner wall of the sweeping bin 202 as possible, so as to ensure the conveying ability of the sweeping rod 207 for the crushed material.

The stirring and sweeping bin 202 is in a round cake shape, a straight pipe 208 is fixedly connected to one side of the front surface of the stirring and sweeping bin 202 along a tangent line, and the bottom surface of the outer side of the straight pipe 208 is fixedly connected and communicated with the top end of the first-order discharge pipe 4.

In the invention, the axes of the poking and sweeping bin 202 and the crushing bin 201 are collinear, and the diameter of the poking and sweeping bin 202 is 1.2 times of that of the crushing bin 201. It should be noted that the scraping and sweeping bin 202 is larger than the crushing bin 201, so that the material crushed by the hammer 206 can be effectively dropped to the inner side of the scraping and sweeping bin 202 and conveyed to the straight pipe 208.

According to the invention, the grinding device 5 comprises two driving shells 501, the two driving shells 501 are respectively and fixedly connected to the left side and the right side of the inner wall of the shell 1, the inner side of each driving shell 501 is rotatably connected with a driving rod 502, the driving rod 502 penetrates through the back side of the shell 1 and extends to the outside of the shell, the front end of the driving rod 502 is fixedly sleeved with a driving bevel gear 503, the side surface of the driving bevel gear 503 is engaged with a driven bevel gear 504, the axial center of the driven bevel gear 504 is fixedly sleeved with driven rods 505, the two driven rods 505 are respectively and rotatably connected to the opposite sides of the driving shells 501 and penetrate through the outside of the driving shells 501, the opposite ends of the two driven rods 505 are fixedly connected with coupling pins 506, and the surfaces of the two coupling pins 506 are mutually abutted and movably connected.

In the invention, the back end of the driving rod 502 is fixedly sleeved with the driving wheels 507, the two driving wheels 507 are in transmission connection, the back end of the driving rod 502 on the left side is fixedly connected with the grinding motor 508 through the coupler, and the grinding motor 508 is fixedly connected to the back of the shell 1.

In the invention, the screening device 6 comprises a rotating plate 601, a screening shaft rod 602 is fixedly inserted in the axis of the rotating plate 601, the screening shaft rod 602 is rotatably connected to the back of the inner wall of the shell 1, a linkage rod 603 is hinged to the centrifugal position of the rotating plate 601, one end of the linkage rod 603 is fixedly connected with a screening box 604, a screen 605 is embedded in the bottom end of the screening box 604, one end of the screening box 604, which is far away from the linkage rod 603, is fixedly connected with a connecting rod 606, the input end of the bucket wheel elevator 7 is fixedly connected with a hopper 607, and the connecting rod 606 is hinged. It should be noted that the back side of the hopper 607 extends upwards by 50-200 mm, and a through groove is formed in the back side, and the through groove is used for providing a horizontal side position offset allowance for the screening box 604 during a vibration action, and the length of the through groove is more than twice of the distance between the linkage rod 603 and the screening shaft 602.

In the invention, the back end of the screening shaft 602 is fixedly connected with a screening motor 608 through a coupler, and the screening motor 608 is fixedly connected to the back of the shell 1.

s1, starting the bucket wheel elevator 7, the screening motor 608, the grinding motor 508 and the crushing motor 203 from top to bottom in sequence, and feeding materials into the feeding pipe 3.

S2, the hammer 206 and the centrifugal force generated by the rotation of the crushing disc 205 begin to extend outwards, the materials entering from the feeding pipe 3 are crushed and crushed into smaller blocks, small materials fall into the sweeping bin 202 and are pushed towards the straight pipe 208 by the rotation of the sweeping rod 207, and the small materials enter the first-order discharging pipe 4 and fall to the upper part of the grinding device 5 along the inclined plane of the first-order discharging pipe.

S3, the small materials fall to the surfaces of the two coupling pin shafts 506 from the first-order discharge pipe 4 to be ground, the materials are ground into particles with uniform sizes, and the particles fall to the surface of the screening device 6 through gaps between the coupling pin shafts 506.

S4, the granular materials falling to the surface of the screen mesh 605 are vibrated and deflected in a reciprocating mode through the hinged point of the connecting rod 606 and the hopper 607 along the rotation action of the rotating plate 601, the granules meeting the mesh size of the screen mesh 605 fall and are conveyed to the second-order discharge pipe 9 along the slope panel 8 to be discharged, the granules not meeting the size fall to the inner side of the hopper 607 along the inclination trend of the screen mesh 605, and the granules are lifted to the first-order discharge pipe 4 through the bucket wheel lifter 7 to repeatedly fall and grind until the granules meeting the size of the granules are discharged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

1. The utility model provides an environment-friendly brick is reducing mechanism for preparation, includes casing (1), its characterized in that: the top of the shell (1) is fixedly connected with a crushing device (2), the side surface of the middle part of the crushing device (2) is fixedly connected with a feeding pipe (3), the output end of the crushing device (2) is fixedly connected with a first-order discharging pipe (4), the first-order discharging pipe (4) is fixedly connected to the top of the inner wall of the shell (1), the middle part of the inner wall of the shell (1) is fixedly connected with a grinding device (5), the bottom end opening of the first-order discharging pipe (4) is over against the top of the grinding device (5), a screening device (6) is arranged below the grinding device (5), and the screening device (6) is movably connected inside the shell (1);

the right side fixedly connected with bucket-wheel lifting machine (7) of casing (1), the bottom of sieving mechanism (6) with the input swing joint of bucket-wheel lifting machine (7), the output of bucket-wheel lifting machine (7) with first-order discharging pipe (4) fixed connection communicates with each other, the bottom fixedly connected with slope panel (8) of casing (1) inner wall, slope panel (8) set up the below of sieving mechanism (6), the left bottom fixedly connected with second order discharging pipe (9) of casing (1), the inboard end of second order discharging pipe (9) with the bottom fixed connection of slope panel (8).

2. The crushing device for manufacturing the environment-friendly bricks according to claim 1, wherein the crushing device comprises: the crushing device (2) comprises a crushing bin (201) and a sweeping bin (202), the crushing bin (201) is fixedly connected and communicated with the sweeping bin (202), and the sweeping bin (202) is fixedly connected to the top of the shell (1);

the top of the crushing bin (201) is fixedly connected with a crushing motor (203), a crankshaft of the crushing motor (203) penetrates through the crushing bin (201) and extends to the inside of the crushing bin, the crankshaft of the crushing motor (203) is fixedly connected with a crushing rod (204) through a coupler, a crushing disc (205) is fixedly sleeved on the surface of the crushing rod (204), and the outer edge of the crushing disc (205) is movably connected with a hammer head (206);

the bottom end of the crushing rod (204) extends downwards to the inner side of the sweeping bin (202) and is rotatably connected with the bottom surface of the inner wall of the sweeping bin, and the sweeping rod (207) is fixedly connected to the peripheral side of the bottom end of the crushing rod (204);

the stirring and sweeping bin (202) is in a round cake shape, a straight pipe (208) is fixedly connected to one side of the front face of the stirring and sweeping bin (202) along a tangent line, and the bottom surface of the outer side of the straight pipe (208) is fixedly connected and communicated with the top end of the first-order discharge pipe (4).

3. The crushing device for manufacturing the environment-friendly bricks according to claim 2, wherein the crushing device comprises: poke and sweep storehouse (202) with the axle center collineation in crushing storehouse (201), poke and sweep the diameter in storehouse (202) and be 1.2 times of crushing storehouse (201) diameter.

4. The crushing device for manufacturing the environment-friendly bricks according to claim 1, wherein the crushing device comprises: the grinding device (5) comprises two driving shells (501), the two driving shells (501) are respectively and fixedly connected to the left side and the right side of the inner wall of the shell (1), the inner side of each driving shell (501) is rotatably connected with a driving rod (502), each driving rod (502) penetrates through the back side of the shell (1) and extends to the outside of the shell, the front end of each driving rod (502) is fixedly sleeved with a driving bevel gear (503), the side surface of each driving bevel gear (503) is meshed with a driven bevel gear (504), the axis of each driven bevel gear (504) is fixedly sleeved with a driven rod (505), the two driven rods (505) are respectively and rotatably connected to the opposite sides of the driving shells (501) and penetrate through the outside of the driving shells (501), and the opposite ends of the two driven rods (505) are fixedly connected with coupling pin shafts (506), the surfaces of the two coupling pin shafts (506) are mutually butted and movably connected.

5. The crushing device for manufacturing the environment-friendly bricks according to claim 4, wherein the crushing device comprises: the back end of the driving rod (502) is fixedly sleeved with a driving wheel (507), the driving wheels (507) are in transmission connection, the back end of the driving rod (502) on the left side is fixedly connected with a grinding motor (508) through a coupler, and the grinding motor (508) is fixedly connected to the back of the shell (1).

6. The crushing device for manufacturing the environment-friendly bricks according to claim 1, wherein the crushing device comprises: screening device (6) include rotor plate (601), the fixed grafting in axle center of rotor plate (601) has screening axostylus axostyle (602), screening axostylus axostyle (602) swivelling joint be in the back of the inner wall of casing (1), the centrifugal position of rotor plate (601) articulates there is gangbar (603), the one end fixedly connected with screening box (604) of gangbar (603), the bottom of screening box (604) is inlayed and is had screen cloth (605), keeping away from of screening box (604) the one end fixedly connected with connecting rod (606) of gangbar (603), the input fixedly connected with hopper (607) of bucket wheel lifting machine (7), connecting rod (606) articulate in one side of hopper (607) inner wall.

7. The crushing device for manufacturing the environment-friendly bricks according to claim 6, wherein the crushing device comprises: the back end of the screening shaft lever (602) is fixedly connected with a screening motor (608) through a coupler, and the screening motor (608) is fixedly connected to the back of the shell (1).

8. The use method of the crushing device for manufacturing the environmental-friendly bricks, according to claim 7, comprises the following steps:

s1, starting the bucket wheel lifter (7), the screening motor (608), the grinding motor (508) and the crushing motor (203) from top to bottom in sequence, and feeding materials into the feeding pipe (3).

S2, the hammer head (206) and the centrifugal force generated by the rotation of the crushing disc (205) begin to extend outwards, the materials entering from the feeding pipe (3) are crushed and crushed into smaller blocks, small materials fall into the sweeping bin (202) and are pushed to the straight pipe (208) by the rotation of the sweeping rod (207), and small materials enter the first-order discharging pipe (4) and fall to the upper part of the grinding device (5) along the inclined surface of the first-order discharging pipe.

S3, enabling the small materials to fall to the surfaces of the two coupling pin shafts (506) from the first-order discharge pipe (4) for grinding, grinding the materials into particles with uniform sizes, and enabling the particles to fall to the surface of the screening device (6) through gaps between the coupling pin shafts (506).

S4, the granular materials falling to the surface of the screen (605) are vibrated and deflected in a reciprocating mode through a hinged point of a connecting rod (606) and a hopper (607) along the rotating action of the rotating plate (601), the granules meeting the mesh size of the screen (605) fall and are conveyed to a second-order discharge pipe (9) along a slope panel (8) to be discharged, the granules not meeting the size fall to the inner side of the hopper (607) along the inclination trend of the screen (605), and the granules are lifted to a first-order discharge pipe (4) through a bucket wheel lifter (7) to repeatedly fall and grind until the granules meet the size of the granules to be discharged.