CN111408456A - A grading ultrafine pulverizing device - Google Patents

Abstract

A hierarchical ultramicro crushing device is characterized in that the top of a crushing box body is connected with a feeding pipeline, and the bottom of the crushing box body is connected with a discharging pipeline; the primary crushing mechanism comprises a main crushing roller A and a secondary crushing roller A which are arranged in parallel; the secondary crushing mechanism comprises a main crushing roller B and a secondary crushing roller B which are arranged in parallel; the aggregate hopper is arranged between the primary crushing mechanism and the secondary crushing mechanism; a material guide plate connected with the discharge end of the belt conveyor extends into the upper part of the aggregate hopper; the first sieve plate is obliquely arranged in a manner that the left part is lower than the right part, and the left end of the first sieve plate extends to the outer side of the crushing box body; the second sieve plate is obliquely arranged in a manner of being higher left and lower right, and two ends of the second sieve plate extend to the outer side of the crushing box body; the left side of the material sliding plate is obliquely arranged with a lower left side and a higher right side, the material sliding plate is connected with the first sieve plate and a feed hopper of a 90-degree large-inclination-angle hoisting machine, and a discharge hopper of the 90-degree large-inclination-angle hoisting machine extends to the upper part of the feed end of the belt conveyor; an aeration pipe network is arranged in the mixing cavity. The device can realize the grading crushing operation, and the particle size after crushing is smaller, and the homogeneity is good.

Description

A grading ultrafine pulverizing device

technical field

The invention belongs to the technical field of crushing equipment, and in particular relates to a grading ultrafine crushing device.

Background technique

Water-soluble fertilizer is a kind of multi-component compound fertilizer that can be completely dissolved in water. It can be quickly dissolved in water and is more easily absorbed by crops, and its absorption and utilization rate is relatively high. More importantly, it can be used in sprinkler and drip irrigation. and other facilities agriculture, realize the integration of water and fertilizer, and achieve the efficiency of saving water, fertilizer and labor. Compared with traditional superphosphate, granulated compound fertilizer and other varieties, water-soluble fertilizer has obvious advantages of less dosage, convenient use, low use cost, fast crop absorption, and high utilization rate of nutrients.

In the prior art, the production of water-soluble fertilizer particles is mostly carried out by pulverizing equipment, and the pulverized particles are dissolved in water to make a water solvent of the fertilizer. The utilization rate of fertilizer has a more important influence, and the degree of pulverization of fertilizer particles is determined by the pulverizing equipment. At this stage, most of the pulverizing equipment used for the production of water-soluble fertilizers can only perform one-level pulverization operations, and the pulverization effect is poor, resulting in The pulverized particles have a large diameter and poor uniformity, resulting in poor mixing of the fertilizer water solvent produced subsequently, resulting in an unsatisfactory nutritional effect of the fertilizer water solvent.

SUMMARY OF THE INVENTION

In view of the problems existing in the above-mentioned prior art, the present invention provides a classification ultrafine pulverization device, which can realize classification and crushing operation, can make the particle size of the pulverized fertilizer small, and has good uniformity, and can make the fertilizer produced The mixing degree of the water solvent is good, and the nutritional effect is ideal.

In order to achieve the above purpose, the present invention provides a grading ultra-fine pulverizing device, including a pulverizing box, a primary crushing mechanism, a secondary crushing mechanism, a collecting hopper, a belt conveyor, a first sieve plate, a second sieve plate, a sliding A material plate, a 90-degree tilt angle elevator and a stirring shaft; the crushing box includes a crushing cavity located in the upper part, a screening cavity located in the middle part and a mixing cavity located in the lower part;

The crushing box is a closed structure, the top of which is connected with a feed pipeline that communicates with the upper part of the crushing chamber, and the bottom of which is connected to a discharge pipeline that communicates with the lower part of the mixing chamber. A flow valve and a control valve are respectively arranged on the pipeline;

The primary crushing mechanism includes a main crushing roller A and a secondary crushing roller A arranged in parallel on the upper part of the crushing cavity. Cutter A, and a plurality of main cutter A and a plurality of slave cutter A are arranged in a staggered manner; the main crushing roller A and the secondary crushing roller A are rotatably connected in the crushing box through the two short shafts at the front and rear ends thereof. After the main crushing roller A and the short shaft on the left side of the crushing roller A pass through the crushing box body, there are respectively a main driving gear A and a secondary driving gear A, and the short shaft on the main crushing roller A is fixed to the outside of the crushing box body. The first drive motor on the left side is connected, and the main drive gear A is meshed with the slave drive gear A;

The secondary crushing mechanism includes a main crushing roller B and a secondary crushing roller B arranged in parallel at the lower part of the crushing cavity. disc B, and multiple main cutter discs B and multiple secondary cutter discs B are arranged staggered with each other, and the gap between the main cutter disc B and the secondary cutter disc B is smaller than the gap between the main cutter disc A and the secondary cutter disc A; the main cutter is broken Both the roller B and the secondary crushing roller B are rotatably connected to the crushing box through the two short shafts at the front and rear ends. The main drive gear B and the slave drive gear B, and the short shaft on the main crushing roller B is connected with the second drive motor fixed on the left side of the outside of the crushing box, and the main drive gear B and the slave drive gear B are meshed;

The aggregate hopper is arranged between the primary crushing mechanism and the secondary crushing mechanism, and its large mouth end is connected to the inner side wall of the crushing box, and its small mouth end extends in a strip shape, and is located between the main crushing roller B and the secondary crushing roller. above between B;

The belt conveyor is fixedly installed on the left side of the outside of the crushing box, and is located above the collecting hopper; the discharge end of the belt conveyor is connected with a material guide plate; the material guide plate is opened on the left side wall of the crushing box by opening The feed port extends to the upper part of the aggregate hopper;

The first sieve plate is installed obliquely above the sieving cavity, its right end is fixedly connected with the right side wall of the crushing box, and its left end extends through the upper bar-shaped outlet opened on the left side wall of the crushing box. to the outside of the crushing box;

The aperture of the second sieve plate is smaller than the aperture of the first sieve plate, the second sieve plate is arranged at the bottom of the screening cavity with a high left and a low right, and the left end of the second sieve plate passes through the lower left bar formed on the left side wall of the crushing box. The outlet extends to the left side of the outside of the pulverizing box, and its right end extends to the right side of the outside of the pulverizing box through the lower right strip outlet opened on the right side wall of the pulverizing box, and the left and right sides of the outside of the pulverizing box correspond to A left support beam and a right support beam are respectively fixedly connected below the left and right ends of the second screen plate, and the upper ends of the left support beam and the right support beam are respectively fixedly connected with adjustable support rods A for supporting the lower parts of the left and right ends of the second screen plate and adjustable support rod B;

The sliding plate is arranged obliquely on the left side of the outside of the crushing box, its upper end extends below the left end of the first sieve plate and is fixedly connected with the left side wall of the crushing box, and its lower end extends to the left ;

The 90-degree large inclination elevator is arranged on the left side of the outside of the crushing box, and its feed hopper extends below the left end of the slide plate, and its discharge hopper extends above the feed end of the belt conveyor;

The mixing chamber is filled with an aqueous solution; the stirring shaft is rotatable in the crushing box, and is located in the middle of the mixing chamber in the height direction, and several stirring rods are connected in its length direction; the left end of the stirring shaft passes through the crushing box The bottom of the mixing chamber is installed with an aeration pipe network all over its surface, and the aeration pipe network consists of a plurality of connected aeration pipelines and several nozzles installed on the aeration pipelines. , the intake pipe of the aeration pipe network penetrates the outside of the crushing box and is connected to the air compressor.

Further, in order to facilitate material receiving, it also includes a collection box arranged on the right side of the outside of the crushing box, and the collection box is arranged below the right end of the second sieve plate.

Further, in order to improve the speed of feeding, both the first sieve plate and the second sieve plate are connected with vibrators.

Further, in order to automatically adjust the inclination angle of the second screen plate, the adjustable support rod A and the adjustable support rod B are both linear electric push rods.

Further, in order to facilitate observation, the crushing box is provided with a transparent observation window at a position between the corresponding secondary crushing mechanism and the first sieve plate.

In the present invention, the secondary crushing mechanism is arranged below the primary crushing mechanism, so that secondary crushing of the primary crushed material can be realized, so that the particle size after secondary crushing can be ensured to be smaller, and an assistant can achieve the The mixing of the aqueous solution can also further improve the mixing degree. Through the setting of the collecting hopper, the materials crushed by the primary crushing mechanism can be collected and supplied to the secondary crushing mechanism in a centralized manner, which is convenient for secondary crushing, so that the effect and efficiency of the secondary crushing can be improved. Through the setting of the first sieve plate, the first screening of the material after secondary crushing can be realized, in which the small particle material falls through the first sieve plate to the second sieve plate, and the larger particle material passes through the left end of the first sieve plate. It is discharged and enters the right end of the feed plate, and then slides down to the feeding hopper of the 90-degree large inclination angle elevator under the action of its own weight. During operation, the 90-degree large inclination elevator lifts the medium material entering its feed hopper to the discharge hopper and discharges it into the feed end of the belt conveyor. The material is continuously transported to the guide plate, and then into the aggregate hopper, so that the larger particles can be crushed again through the secondary crushing mechanism, which can effectively ensure that the particle size of the crushed material is more uniform. The setting of the second sieve plate can realize further sieving of materials, and the materials with smaller particle size fall into the mixing cavity through the second sieve plate, so that the rapid mixing with the aqueous solution can be realized, and the mixing degree can be more ideal. . The material discharged through the right end of the second sieve plate can be notified to the collecting box for collection, so as to facilitate re-crushing or other subsequent processing. The setting of the adjustable support rod A and the adjustable support rod B can adjust the inclination angle of the second screen plate by adjusting the longitudinal height, so that the discharge efficiency can be controlled. The mixing chamber is provided with a stirring shaft with a stirring rod driven by a third driving motor, which can further improve the dissolving speed of the crushed materials in the aqueous solution, and at the same time, can also improve the mixing effect. By setting the aeration pipe network at the bottom of the mixing chamber, air can be added to make the air bubbles act on the mixture of the aqueous solution and the material, thereby further improving the mixing efficiency and the effect of water solubility. The device can realize grading and crushing operation, can make the particle size of the crushed fertilizer small, and has good uniformity, and can make the produced fertilizer have better mixing degree of water solvent and ideal nutritional effect.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the primary crushing mechanism in the present invention;

3 is a schematic structural diagram of a secondary crushing mechanism in the present invention.

In the picture: 1. Crushing box, 2. Primary crushing mechanism, 3. Crushing cavity, 4. Screening cavity, 5. Mixing cavity, 6. Secondary crushing mechanism, 7. Aggregate hopper, 8. Belt conveyor , 9, the first sieve plate, 10, the second sieve plate, 11, the feed plate, 12, 90 degree high angle elevator, 13, the stirring shaft, 14, the feeding pipeline, 15, the flow valve, 16, the main Crushing Roller A, 17, Slave Crushing Roller A, 18, Main Cutter A, 19, Slave Cutter A, 20, Main Drive Gear A, 21, Slave Drive Gear A, 22, First Drive Motor, 23, Main Crushing Roller B, 24, Slave crushing roller B, 25, Main cutter head B, 26, Slave cutter head B, 27, Main drive gear, 28, Slave drive gear B, 29, Second drive motor, 30, Material guide plate, 31, Feed inlet, 32, upper bar outlet, 33, left lower bar outlet, 34, right lower bar outlet, 35, left support beam, 36, right support beam, 37, adjustable support rod A, 38, adjustable Support rod B, 39, third drive motor, 40, aeration pipe network, 41, discharge pipeline, 42, collecting box, 43, observation window.

Detailed ways

The present invention will be further described below.

As shown in Figures 1 to 3, a grading ultra-fine pulverizing device includes a pulverizing box 1, a primary crushing mechanism 2, a secondary crushing mechanism 6, a collection hopper 7, a belt conveyor 8, and a first sieve plate 9. , the second sieve plate 10, the feed plate 11, the 90-degree large inclination elevator 12 and the stirring shaft 13; the crushing box 1 includes a crushing cavity 3 located in the upper part, a screening cavity 4 located in the middle and a mixing chamber located in the lower part. cavity 5;

The crushing box 1 is a closed structure, the top of which is connected with a feed pipeline 14 that communicates with the upper part of the crushing cavity 3, and the bottom of which is connected to a discharge pipeline 41 that communicates with the lower part of the mixing cavity 5. The pipeline 14 and the discharge pipeline 41 are respectively provided with a flow valve 15 and a control valve;

The primary crushing mechanism 2 includes a primary crushing roller A16 and a secondary crushing roller A17 arranged in parallel on the upper part of the crushing cavity 3, and the primary crushing roller A16 and the secondary crushing roller A17 are respectively uniformly sleeved with a plurality of primary cutter discs A18. and slave cutter head A19, and a plurality of main cutter heads A18 and multiple slave cutter heads A19 are arranged staggered with each other; the main crushing roller A16 and the secondary crushing roller A17 are rotatably connected to the crushing box through the two short shafts at the front and rear ends thereof. In the body 1, the main crushing roller A16 and the short shaft on the left side of the secondary crushing roller A17 pass through the crushing box 1 and are respectively fitted with the main driving gear A20 and the secondary driving gear A21, and the short shaft on the main crushing roller A16 is fixed with the The first drive motor 22 on the outer left side of the crushing box 1 is connected, and the main drive gear A20 meshes with the slave drive gear A21;

The secondary crushing mechanism 6 includes a main crushing roller B23 and a secondary crushing roller B24 arranged in parallel at the lower part of the crushing cavity 3. The main crushing roller B23 and the secondary crushing roller B24 are respectively uniformly sleeved with a plurality of main cutter discs B25 and B24. Slave cutter head B26, and a plurality of master cutter heads B25 and a plurality of slave cutter heads B26 are arranged staggered with each other, and the gap between the main cutter head B25 and the slave cutter head B26 is smaller than the gap between the main cutter head A18 and the slave cutter head A195; The main crushing roller B23 and the secondary crushing roller B24 are rotatably connected in the crushing box 1 through the two short shafts at the front and rear ends. 1 are respectively sheathed with the main drive gear B27 and the slave drive gear B28, and the short shaft on the main crushing roller B23 is connected to the second drive motor 29 fixed on the left side of the outside of the crushing box 1. The main drive gear B27 and the slave drive Gear B28 meshes;

The aggregate hopper 7 is arranged between the primary crushing mechanism 2 and the secondary crushing mechanism 6, and its large mouth end is connected to the inner side wall of the crushing box 1, and its small mouth end extends in a strip shape and is located at the main crushing roller B23. and from above between the crushing rollers B24;

The belt conveyor 8 is fixedly installed on the left side of the outside of the crushing box 1, and is located above the collecting hopper 7; the discharge end of the belt conveyor 8 is connected with a material guide plate 30; The feeding port 31 on the left side wall of the box body 1 extends to the upper part of the collecting hopper 8;

The first sieve plate 9 is installed obliquely above the screening cavity 4, its right end is fixedly connected with the right side wall of the crushing box 1, and its left end passes through the upper opening on the left side wall of the crushing box 1. The bar-shaped outlet 33 extends to the outside of the crushing box 1;

The aperture of the second sieve plate 10 is smaller than the aperture of the first sieve plate 9 , the second sieve plate 10 is obliquely arranged below the screening cavity 4 , and its left end is opened on the left side wall of the crushing box 1 . The upper left and lower bar-shaped outlet 33 extends to the left side of the outside of the pulverizing box 1, and its right end extends to the right side of the outside of the pulverizing box 1 through the lower right bar-shaped outlet 34 opened on the right side wall of the pulverizing box 1, and The left and right sides of the outside of the crushing box 1 are respectively fixedly connected with a left support beam 35 and a right support beam 36 below the left and right ends of the second sieve plate 10, and the upper ends of the left support beam 35 and the right support beam 36 are respectively fixed and connected. Adjustable support rod A37 and adjustable support rod B38 at the lower part of the left and right ends of the second screen plate 10;

The sliding plate 11 is disposed on the left side of the outside of the crushing box 1 obliquely, and its upper end extends below the left end of the first sieve plate 9 and is fixedly connected with the left side wall of the crushing box 1, and its lower end extend to the left;

The 90-degree high-inclined elevator 12 is arranged on the left side of the outside of the crushing box 1, its feed hopper extends below the left end of the slide plate 11, and its discharge hopper extends above the feed end of the belt conveyor 8;

The mixing chamber 6 is filled with an aqueous solution; the stirring shaft 13 is rotatably pulverized in the box 1, and is located in the middle of the mixing chamber 6 in the height direction, and several stirring rods are connected in its length direction; The left end passes through the crushing box 1 and is connected to the third drive motor 39; the bottom of the mixing chamber 6 is installed with aeration pipe network 40 all over its surface, and the aeration pipe network 40 is connected by a plurality of aeration pipes and installations The aeration pipeline is composed of several nozzles, and the intake pipeline of the aeration pipeline network 40 penetrates the outside of the crushing box 1 and is connected to the air compressor.

In order to facilitate material receiving, it also includes a collecting box 42 arranged on the right outside of the crushing box 1 , and the collecting box 42 is arranged below the right end of the second sieve plate 10 .

In order to improve the feeding speed, vibrators are connected to the first sieve plate 9 and the second sieve plate 10.

In order to automatically adjust the inclination angle of the second screen plate, the adjustable support rod A37 and the adjustable support rod B38 are both linear electric push rods.

In order to facilitate observation, the crushing box 1 is provided with a transparent observation window 43 at a position between the corresponding secondary crushing mechanism 6 and the first sieve plate 9 .

In the present invention, the secondary crushing mechanism is arranged below the primary crushing mechanism, so that secondary crushing of the primary crushed material can be realized, so that the particle size after secondary crushing can be ensured to be smaller, and an assistant can achieve the The mixing of the aqueous solution can also further improve the mixing degree. Through the setting of the collecting hopper, the materials crushed by the primary crushing mechanism can be collected and supplied to the secondary crushing mechanism in a centralized manner, which is convenient for secondary crushing, so that the effect and efficiency of the secondary crushing can be improved. Through the setting of the first sieve plate, the first screening of the material after secondary crushing can be realized, in which the small particle material falls through the first sieve plate to the second sieve plate, and the larger particle material passes through the left end of the first sieve plate. It is discharged and enters the right end of the feed plate, and then slides down to the feeding hopper of the 90-degree large inclination angle elevator under the action of its own weight. During operation, the 90-degree large inclination elevator lifts the medium material entering its feed hopper to the discharge hopper and discharges it into the feed end of the belt conveyor. The material is continuously transported to the guide plate, and then into the aggregate hopper, so that the larger particles can be crushed again through the secondary crushing mechanism, which can effectively ensure that the particle size of the crushed material is more uniform. The setting of the second sieve plate can realize further sieving of materials, and the materials with smaller particle size fall into the mixing cavity through the second sieve plate, so that the rapid mixing with the aqueous solution can be realized, and the mixing degree can be more ideal. . The material discharged through the right end of the second sieve plate can be notified to the collecting box for collection, so as to facilitate re-crushing or other subsequent processing. The setting of the adjustable support rod A and the adjustable support rod B can adjust the inclination angle of the second screen plate by adjusting the longitudinal height, so that the discharge efficiency can be controlled. The mixing chamber is provided with a stirring shaft with a stirring rod driven by a third driving motor, which can further improve the dissolving speed of the crushed materials in the aqueous solution, and at the same time, can also improve the mixing effect. By setting the aeration pipe network at the bottom of the mixing chamber, air can be added to make the air bubbles act on the mixture of the aqueous solution and the material, thereby further improving the mixing efficiency and the effect of water solubility. The device can realize grading and crushing operation, can make the particle size of the crushed fertilizer small, and has good uniformity, and can make the produced fertilizer have better mixing degree of water solvent and ideal nutritional effect.

Claims (5)

1. A grading and ultrafine pulverizing device, comprising a pulverizing box (1) and a primary crushing mechanism (2), wherein the pulverizing box (1) comprises a crushing cavity (3) located in the upper part and a screening cavity (3) located in the middle. 4) and the mixing chamber (5) located in the lower part, characterized in that it also includes a secondary crushing mechanism (6), a collecting hopper (7), a belt conveyor (8), a first sieve plate (9), a first Two sieve plates (10), a feeder plate (11), a 90-degree large inclination elevator (12) and a stirring shaft (13); The crushing box (1) is a closed structure, the top of which is connected with a feeding pipeline (14) that communicates with the upper part of the crushing cavity (3), and the bottom of which is connected with a discharge that communicates with the lower part of the mixing cavity (5). A pipeline (41), a flow valve (15) and a control valve are respectively provided on the feed pipeline (14) and the discharge pipeline (41); The primary crushing mechanism (2) comprises a main crushing roller A (16) and a secondary crushing roller A (17) arranged in parallel on the upper part of the crushing cavity (3), the primary crushing roller A (16) and the secondary crushing roller A The roller body of (17) is evenly sheathed with a plurality of main cutter discs A (18) and slave cutter discs A (19), and the plurality of main cutter discs A (18) and a plurality of slave cutter discs A (19) are staggered with each other. Arrangement; the main crushing roller A (16) and the secondary crushing roller A (17) are rotatably connected in the crushing box (1) through the two short shafts at the front and rear ends of the primary crushing roller A (16) and the secondary crushing roller A (16). The short shaft on the left side of the roller A (17) passes through the crushing box (1) and is fitted with the main driving gear A (20) and the secondary driving gear A (21) respectively, and the short shaft on the main crushing roller A (16) is connected with the first drive motor (22) fixed on the left side of the outside of the crushing box (1), and the main drive gear A (20) meshes with the slave drive gear A (21); The secondary crushing mechanism (6) comprises a main crushing roller B (23) and a secondary crushing roller B (24) arranged in parallel at the lower part of the crushing cavity (3), the primary crushing roller B (23) and the secondary crushing roller B ( 24) The roller body is evenly sheathed with a plurality of main cutter discs B (25) and slave cutter discs B (26), and the plurality of main cutter discs B (25) and a plurality of slave cutter discs B (26) are arranged in a staggered manner. , and the gap between the main cutter head B (25) and the slave cutter head B (26) is smaller than the gap between the main cutter head A (18) and the slave cutter head A (195); the main crushing roller B (23) and the slave crusher The roller B (24) is rotatably connected to the crushing box (1) through its two short shafts at the front and rear ends. The main crushing roller B (23) and the short shaft on the left side of the crushing roller B (24) pass through After crushing the box (1), the main driving gear B (27) and the secondary driving gear B (28) are respectively fitted, and the short shaft on the main crushing roller B (23) is fixed on the left side of the outer side of the crushing box (1). The second drive motor (29) is connected, and the main drive gear B (27) is meshed with the slave drive gear B (28); The aggregate hopper (7) is arranged between the primary crushing mechanism (2) and the secondary crushing (6) mechanism, and its large mouth end is connected to the inner side wall of the crushing box (1), and its small mouth end is strip-shaped extends, and is located above between the main crushing roller B (23) and the secondary crushing roller B (24); The belt conveyor (8) is fixedly installed on the left side of the outside of the crushing box (1), and is located above the collecting hopper (7); the discharge end of the belt conveyor (8) is connected with a material guide plate (30). ); the guide plate (30) extends to the upper part of the collecting hopper (8) through the feeding port (31) provided on the left side wall of the crushing box (1); The first sieve plate (9) is installed obliquely above the screening cavity (4) with a low left and a high right. 1) The upper strip outlet (33) on the left side wall extends to the outside of the crushing box (1); The aperture of the second sieve plate (10) is smaller than the aperture of the first sieve plate (9). The lower left bar-shaped outlet (33) on the left side wall of the crushing box (1) extends to the left outside the crushing box (1), and its right end passes through the lower right opening on the right side wall of the crushing box (1). The bar-shaped outlet (34) extends to the right side of the outside of the pulverizing box (1), and the left and right sides of the outside of the pulverizing box (1) are respectively fixedly connected with left and right ends corresponding to the left and right ends of the second sieve plate (10). The support beam (35) and the right support beam (36), the upper ends of the left support beam (35) and the right support beam (36) are respectively fixedly connected with adjustable support rods for supporting the lower part of the left end and the right end of the second screen plate (10) A(37) and adjustable support rod B(38); The sliding plate (11) is arranged obliquely on the left side of the outside of the crushing box (1), and its upper end extends below the left end of the first sieve plate (9) and is connected to the side of the crushing box (1). The left side wall is fixedly connected, and its lower end extends to the left; The 90-degree large inclination elevator (12) is arranged on the left side of the outside of the crushing box (1), its feed hopper extends below the left end of the slide plate (11), and its discharge hopper extends to the belt conveyor (8). ) above the feed end; The mixing chamber (6) is filled with an aqueous solution; the stirring shaft (13) is rotatably pulverized in the box (1), and is located in the middle of the mixing chamber (6) in the height direction, and is connected with a lengthwise direction of the mixing chamber (6). a number of stirring rods; the left end of the stirring shaft (13) penetrates the pulverizing box (1) and is connected to the third drive motor (39); the bottom of the mixing chamber (6) is provided with an aeration pipe network (40) all over its surface , the aeration pipe network (40) is composed of a plurality of connected aeration pipes and several nozzles installed on the aeration pipes, and the intake pipe of the aeration pipe network (40) passes through the crushing box (1) outside and connected to the air compressor. 2. A grading and ultrafine pulverizing device according to claim 1, characterized in that it further comprises a collecting box (42) arranged on the outer right side of the pulverizing box (1), the collecting box (42) It is arranged below the right end of the second sieve plate (10). 3. A grading and ultrafine pulverizing device according to claim 1 or 2, characterized in that a vibrator is connected to both the first sieve plate (9) and the second sieve plate (10). 4 . The grading and ultrafine pulverizing device according to claim 3 , wherein the adjustable support rod A ( 37 ) and the adjustable support rod B ( 38 ) are both linear electric push rods. 5 . 5. A grading and ultrafine pulverizing device according to claim 4, characterized in that the pulverizing box (1) is located between the corresponding secondary crushing mechanism (6) and the first sieve plate (9). A transparent observation window (43) is provided.

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