Oyster shell powder processing and crushing equipment and crushing method

Abstract

The present invention discloses an oyster shell powder processing and crushing equipment and a crushing method thereof, the crushing equipment comprises: a casing, the casing is provided with a crushing chamber; a crushing mechanism, comprising a group of crushing rollers rotatably installed in the crushing chamber, a group of crushing rollers are respectively fixed with crushing protrusions on the outer side walls, and the crushing protrusions on different crushing rollers are respectively staggered; a crushing reinforcement mechanism, comprising a fixed support member, the fixed support member is respectively fixed with an arc-shaped limit plate inwardly, and the arc-shaped limit plate is respectively fixed with a corresponding ultrasonic transducer; the crushing protrusions are respectively hollow and fixedly installed with corresponding abutments, and the inner end of the abutment member is in contact with the arc-shaped limit plate when rotating through the arc-shaped limit plate. The present invention can effectively apply vibration energy to the crushing protrusions on the opposite side of a group of crushing rollers, thereby effectively improving the crushing effect and crushing efficiency of oyster shell materials.

Description

Technical Field

[0001] The invention relates to the technical field of oyster shell crushing and processing, and in particular to an oyster shell powder processing and crushing device and a crushing method thereof, which can crush and process oyster shells efficiently. Background Art

[0002] Oyster shell is a natural mineral rich in calcium carbonate, which is widely used in agriculture, aquaculture and environmental protection. In recent years, with the increasing demand for resource utilization of oyster shells, the application of oyster shell powder as fertilizer and soil conditioner has also gradually increased.

[0003] The premise of oyster shell powder processing is to crush it. The existing oyster shell powder processing and crushing equipment generally adopts a double-roller crusher, which includes a group of crushing rollers driven by a driving mechanism. Crushing protrusions are set on the side walls of the crushing rollers to ensure the crushing effect of the material. During the crushing process, the material first enters a group of crushing rollers, and is ground and crushed by the crushing protrusions between a group of crushing rollers. The crushed material is further crushed to the corresponding particle size under the crushing action of the rotating crushing protrusions and then discharged. Such oyster shell powder processing and crushing equipment has the following defects in actual use, namely: when the material enters a group of crushing rollers, it can only rely on the mutual extrusion between the crushing protrusions to achieve the grinding and crushing operation of the material, and its crushing effect and efficiency are relatively low. In order to improve the crushing effect of materials, some manufacturers have begun to try to apply vibration energy to the crushing bumps of the crushing drum. Although the introduction of vibration energy can improve the crushing effect of materials to a certain extent, the introduction of vibration energy will have a significant impact on the installation and operating stability of the crushing drum and other components of the equipment. Therefore, it is currently impossible to directly apply vibration energy to the crushing bumps of the crushing drum, resulting in the existing oyster shell powder processing and crushing equipment. The oyster shell crushing effect is difficult to be effectively improved.

[0004] Therefore, under the premise of not affecting the installation and operation stability of components such as the crushing drum, the purpose of the present invention is to design an oyster shell powder processing and crushing equipment and a crushing method that can effectively apply vibration energy to the crushing protrusions on the opposite side of a group of crushing drums, thereby effectively improving the crushing effect and crushing efficiency of the oyster shell material. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides oyster shell powder processing and crushing equipment and a crushing method thereof, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] An oyster shell powder processing and crushing device, comprising:

[0008] A casing, wherein the casing is provided with a crushing chamber, and a plurality of corresponding filter material holes are provided at the bottom of the crushing chamber;

[0009] The crushing mechanism comprises a group of crushing rollers rotatably mounted in the crushing chamber, the crushing rollers are driven to rotate by corresponding driving mechanisms, a group of crushing rollers have multiple rows of corresponding crushing protrusions fixedly connected side by side on the outer side walls, and the crushing protrusions on different crushing rollers are staggered;

[0010] The crushing material reinforcement mechanism comprises a fixed support member coaxially installed in the crushing drum, the fixed support member is respectively fixedly connected inwardly with an arc-shaped limit plate adapted to the crushing material protrusion, the arc-shaped limit plate is respectively fixedly connected with a corresponding ultrasonic transducer, and the ultrasonic transducer is respectively connected to an external ultrasonic generator; the crushing material protrusion is respectively hollow and fixedly installed with a corresponding abutment member, the outer end portion of the abutment member is respectively fixedly connected to the crushing material protrusion, the middle section of the abutment member is spaced from the crushing material protrusion, the inner end portion of the abutment member is in contact with the arc-shaped limit plate when rotating through the arc-shaped limit plate, and the ultrasonic vibration is transmitted to the end of the crushing material protrusion through the abutment member.

[0011] The inner end of the abutment member is respectively concavely provided with a corresponding spherical mounting groove, and the corresponding supporting balls are rollingly mounted in the spherical mounting groove. When the inner end of the abutment member rotates through the arc-shaped limit plate, the supporting balls come into contact with the arc-shaped limit plate.

[0012] The inner end portions of the abutment members are respectively fixedly connected with annular fixing members for limiting the support balls by means of threaded connection, and the inner end portions of the support balls extend to the inner side of the annular fixing members.

[0013] A supporting gasket made of engineering plastic is fixedly installed in the spherical installation groove.

[0014] The driving mechanism comprises a driving shaft fixedly connected to the shredding drum, and the driving shaft is respectively connected to the output shaft end of the corresponding driving motor through a corresponding reducer.

[0015] The middle sections of the abutment members are sleeved with corresponding buffer blocks, and the buffer blocks are respectively fixed between the crushed material protrusions and the abutment members in an extruded state.

[0016] The outer end of the abutment piece is connected to the chip projection by a threaded connection.

[0017] The buffer pad is made of rubber material, and a plurality of corresponding vibration-damping grooves are spirally distributed on the periphery of the buffer pad. The rotation direction of the vibration-damping grooves is consistent with the screw connection direction of the abutment and the crushing protrusion. After the abutment is screwed to the crushing protrusion, the vibration-damping grooves are compressed and closed to form vibration-damping holes.

[0018] A method for processing and crushing oyster shell powder, based on the oyster shell powder processing and crushing equipment described in the first embodiment, comprises the following specific steps:

[0019] S1, the driving mechanism is started to drive the crushing drum provided with crushing protrusions to rotate;

[0020] S2, the external ultrasonic generator is started, the ultrasonic transducer generates ultrasonic vibration, and the ultrasonic vibration is transmitted to the arc-shaped limit plate;

[0021] S3, continuously feeding the oyster shell material into the crushing chamber of the casing of the crushing equipment;

[0022] S4, as the crushing drum rotates, the crushing projection rotates accordingly to crush the oyster shell material;

[0023] S5, when the inner end of the abutment member rotates through the arc-shaped limit plate and comes into contact with the arc-shaped limit plate, the ultrasonic vibration is transmitted to the crushing protrusion through the arc-shaped limit plate, so that the crushing protrusions between a group of the crushing rollers generate obvious ultrasonic vibration when they are close to each other, so as to form efficient grinding and crushing of the material;

[0024] S6, the material with a particle size smaller than the filter hole of the crushing chamber is output through the filter hole, and the material with a particle size larger than the filter hole continues to be crushed in steps S4-S5.

[0025] Advantages of the present invention:

[0026] 1) The present invention further adds a crushing reinforcement mechanism on the basis of the traditional crushing mechanism, which includes a fixed support member installed in a coaxial state through the crushing drum, and the fixed support member and the arc-shaped limit plate are used to realize the directional independent installation of the vibration source (ultrasonic transducer). The most important thing is that the crushing protrusions are respectively hollow and fixedly installed with corresponding abutments, and the outer ends of the abutments are respectively fixed to the crushing protrusions, and the middle section of the abutments is spaced apart from the crushing protrusions. When the inner end of the abutment rotates through the arc-shaped limit plate, it forms contact with the arc-shaped limit plate, so that the ultrasonic vibration is directly transmitted to the end of the crushing protrusion through the abutment. It can not only ensure the amount of vibration energy transmitted to the crushing protrusion, but also reduce the influence of vibration on the crushing drum and other components, so as to achieve: under the premise of reducing the installation and operation stability of the crushing drum and other components by ultrasonic vibration, the vibration energy is effectively applied to the crushing protrusions on the opposite side of a group of crushing drums, thereby effectively improving the grinding and crushing effect of oyster shell materials.

[0027] 2) The inner end of the abutment of the present invention is respectively concavely provided with a corresponding spherical mounting groove, and a corresponding supporting ball is rollingly mounted in the spherical mounting groove. When the inner end of the abutment rotates through the arc-shaped limit plate, the supporting ball contacts the arc-shaped limit plate. The contact between the abutment and the arc-shaped limit plate is achieved under the premise of rolling support, so as to effectively ensure the smoothness of vibration transmission while reducing wear.

[0028] The most important thing is that a support gasket made of engineering plastic is fixedly installed in the spherical mounting groove of the present invention. Since engineering plastic has sufficient surface smoothness and sufficient strength, with the intervention of the support gasket, the rolling smoothness of the support ball can be significantly improved, and the connection rigidity between the support ball and the abutment can be maintained, thereby further effectively ensuring the smoothness of vibration transmission.

[0029] 3) The middle section of the abutment of the present invention is respectively sleeved with corresponding buffer pads, which are respectively fixed between the crushing protrusion and the abutment in an extruded state. The buffer pads are introduced to ensure the overall installation stability of the abutment while reducing the amount of vibration energy transmitted to the crushing drum, thereby effectively improving the practical effect of the present invention.

[0030] 4) The outer end of the abutment of the present invention is connected to the crushing protrusion by a threaded connection, so as to facilitate the installation and processing of the abutment, and the buffer pad of the present invention is made of rubber material, and a plurality of corresponding vibration-damping grooves are respectively arranged in a spiral state at the periphery of the buffer pad, and the rotation direction of the vibration-damping groove is consistent with the rotation direction of the abutment and the crushing protrusion. After the abutment is screwed to the crushing protrusion, the vibration-damping groove is compressed and closed to form a vibration-damping hole. When the vibration is transmitted through the vibration-damping hole formed by the compression and closure of the vibration-damping groove, resonance energy consumption is generated, thereby further reducing the amount of vibration energy transmitted to the crushing drum, so as to ensure the practical effect of the present invention, and reverse clamping can be achieved under the action of the vibration-damping groove to prevent the abutment from being reversely screwed out under the continuous interval vibration, thereby further ensuring the practical effect of the present invention.

[0031] 5) Compared with the existing oyster shell crushing process, the oyster shell material is effectively crushed by the present invention, which can effectively and significantly improve the crushing effect and crushing efficiency of the oyster shell material. This is because: when the oyster shell material of the present invention enters the crushing chamber, that is, when the oyster shell enters between a group of crushing rollers, it can be quickly crushed under the ultrasonic vibration environment, and then crushed to a suitable particle size under the further crushing action of the rotating crushing protrusion, thereby effectively and significantly improving the crushing effect and crushing efficiency of the oyster shell material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a cross-sectional view of the present invention.

[0034] Figure 3 It is a schematic diagram of the assembly of the crushed material reinforcement mechanism and the abutment member.

[0035] Figure 4 It is a schematic diagram of the structure in which a supporting ball is installed at the end of the abutment member.

[0036] Figure 5 It is a schematic diagram of the structure of the buffer pad.

[0037] In the accompanying drawings: casing 1, crushing chamber 101, crushing mechanism 2, crushing drum 201, driving mechanism 202, driving shaft 2021, reducer 2022, driving motor 2023, crushing protrusion 203, crushing reinforcement mechanism 3, fixed support 301, arc-shaped limit plate 302, ultrasonic transducer 303, abutment 4, support ball 5, annular fixing member 6, support gasket 7, buffer pad 8, vibration reduction groove 801. DETAILED DESCRIPTION

[0038] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0039] Embodiment 1

[0040] refer to Figure 1-5 , an oyster shell powder processing and crushing equipment, comprising:

[0041] A casing 1, wherein the casing 1 is provided with a crushing chamber 101, and a plurality of corresponding filter material holes are provided at the bottom of the crushing chamber 101;

[0042] The crushing mechanism 2 comprises a group of crushing rollers 201 rotatably mounted in the crushing chamber 101, the crushing rollers 201 are driven to rotate by corresponding driving mechanisms 202, a group of outer side walls of the crushing rollers 201 are fixedly connected in parallel with multiple rows of corresponding crushing protrusions 203, and the crushing protrusions 203 on different crushing rollers 201 are staggered.

[0043] The crushing reinforcement mechanism 3 comprises a fixed support member 301 which is coaxially installed in the crushing drum 201, and the fixed support member 301 is respectively fixedly connected inwardly with an arc-shaped limit plate 302 adapted to the crushing protrusion 203, and the arc-shaped limit plate 302 is respectively fixedly connected with a corresponding ultrasonic transducer 303, and the ultrasonic transducer 303 is respectively connected to an external ultrasonic generator; the crushing protrusion 203 is respectively hollow and fixedly installed with a corresponding abutment member 4, and the outer end of the abutment member 4 is respectively fixedly connected to the crushing protrusion 203, and the middle section of the abutment member 4 is spaced from the crushing protrusion 203, and the inner end of the abutment member 4 is in contact with the arc-shaped limit plate 302 when it rotates through the arc-shaped limit plate 302, and the ultrasonic vibration is transmitted to the end of the crushing protrusion 203 through the abutment member 4.

[0044] The present invention is further provided with a crushing reinforcement mechanism 3 on the basis of the traditional crushing mechanism 2, which comprises a fixed support member 301 coaxially installed in the crushing drum 201, and the fixed support member 301 and the arc-shaped limit plate 302 are used to realize the directional independent installation of the vibration source ultrasonic transducer 303. The crushing protrusions 203 are respectively hollow and fixedly installed with corresponding abutment members 4, and the outer ends of the abutment members 4 are respectively fixed to the crushing protrusions 203, and the middle section of the abutment members 4 is spaced apart from the crushing protrusions 203. When the inner end of the abutment member 4 rotates through the arc-shaped limit plate 302, it comes into contact with the arc-shaped limit plate 302, so that the ultrasonic vibration is directly transmitted to the end of the crushing protrusion 203 through the abutment member 4. It can not only ensure the amount of vibration energy transmitted to the crushing protrusion 203, but also reduce the influence of vibration on the crushing drum 201 and other components, so as to achieve: under the premise of reducing the impact of ultrasonic vibration on the installation and operation stability of the crushing drum 201 and other components, the vibration energy is effectively applied to the crushing protrusion 203 rotating through the opposite side of a group of crushing drums 201, thereby effectively improving the grinding and crushing effect of oyster shell materials.

[0045] The inner end of the abutment member 4 is respectively concavely provided with a corresponding spherical mounting groove, in which a corresponding supporting ball 5 is rollingly mounted. When the inner end of the abutment member 4 rotates through the arc-shaped limit plate 302, the supporting ball 5 comes into contact with the arc-shaped limit plate 302.

[0046] The inner end of the abutment member 4 is fixedly connected to an annular fixing member 6 for limiting the support ball 5 by means of threaded connection, and the inner end of the support ball 5 extends to the inner side of the annular fixing member 6 .

[0047] A supporting gasket 7 made of engineering plastic is fixedly installed in the spherical installation groove.

[0048] The inner end of the abutment 4 of the present invention is respectively concavely provided with a corresponding spherical mounting groove, and the corresponding support ball 5 is rollingly mounted in the spherical mounting groove. When the inner end of the abutment 4 rotates through the arc-shaped limit plate 302, the support ball 5 comes into contact with the arc-shaped limit plate 302. The contact between the abutment 4 and the arc-shaped limit plate 302 is achieved under the premise of rolling support, so as to effectively ensure the smoothness of vibration transmission while reducing wear. The most important thing is that a support gasket 7 made of engineering plastic is fixedly installed in the spherical mounting groove of the present invention. Since engineering plastic has sufficient surface smoothness and sufficient strength, the intervention of the support gasket 7 can significantly improve the rolling smoothness of the support ball 5 and maintain the connection rigidity between the support ball 5 and the abutment 4, thereby further effectively ensuring the smoothness of vibration transmission.

[0049] The driving mechanism 202 comprises a driving shaft 2021 fixedly connected to the shredder drum 201 , and the driving shaft 2021 is respectively connected to the output shaft end of the corresponding driving motor 2023 through the corresponding reducer 2022 .

[0050] The middle sections of the abutment members 4 are sleeved with corresponding buffer blocks 8, and the buffer blocks 8 are respectively fixed between the crushed material protrusions 203 and the abutment members 4 in an extruded state. The outer ends of the abutment members 4 are connected to the crushed material protrusions 203 by threaded connection.

[0051] The buffer block 8 is introduced to ensure the overall installation stability of the abutment member 4 while reducing the amount of vibration energy transmitted to the crushing drum 201, thereby effectively improving the practical effect of the present invention.

[0052] The buffer pad 8 is made of rubber material, and a plurality of corresponding vibration-damping grooves 801 are distributed in a spiral state at the periphery of the buffer pad 8. The rotation direction of the vibration-damping grooves 801 is consistent with the screw connection direction of the abutment 4 and the crushing protrusion 203. After the abutment 4 is screwed to the crushing protrusion 203, the vibration-damping grooves 801 are compressed and closed to form vibration-damping holes.

[0053] When the vibration is transmitted through the vibration-damping hole formed by the compression and closure of the vibration-damping groove 801, resonance energy consumption is generated, thereby further reducing the amount of vibration energy transmitted to the crushing drum 201, so as to ensure the practical effect of the present invention, and reverse clamping can be achieved under the action of the vibration-damping groove 801 to prevent the abutment member 4 from being rotated out in the reverse direction under continuous interval vibration, thereby further ensuring the practical effect of the present invention.

[0054] Embodiment 2

[0055] A method for processing and crushing oyster shell powder, based on the oyster shell powder processing and crushing equipment described in the first embodiment, comprises the following specific steps:

[0056] S1, the driving mechanism 202 is started to drive the crushing drum 201 provided with the crushing protrusion 203 to rotate;

[0057] S2, the external ultrasonic generator is started, the ultrasonic transducer 303 generates ultrasonic vibration, and the ultrasonic vibration is transmitted to the arc-shaped limiting plate 302;

[0058] S3, continuously feeding the oyster shell material into the crushing chamber 101 of the casing 1 of the crushing device;

[0059] S4, as the crushing drum 201 rotates, the crushing protrusion 203 rotates accordingly to crush the oyster shell material;

[0060] S5, when the inner end of the abutment member 4 rotates through the arc-shaped limit plate 302 and comes into contact with the arc-shaped limit plate 302, the ultrasonic vibration is transmitted to the crushing protrusion 203 through the arc-shaped limit plate 302, so that the crushing protrusions 203 between a group of crushing rollers 201 generate obvious ultrasonic vibration when they are close to each other, so as to form efficient grinding and crushing of the material;

[0061] S6, the material with a particle size smaller than the filter hole of the crushing chamber is output through the filter hole, and the material with a particle size larger than the filter hole continues to be crushed in steps S4-S5.

[0062] Compared with the existing oyster shell crushing process, the oyster shell material can be effectively crushed by the present invention, and the crushing effect and crushing efficiency of the oyster shell material can be effectively and significantly improved. This is because: when the oyster shell material of the present invention enters the crushing chamber 101, that is, when the oyster shell enters between a group of the crushing rollers 201, it can be quickly crushed under the ultrasonic vibration environment, and then crushed to a suitable particle size under the further crushing action of the rotating crushing protrusion 203, thereby effectively and significantly improving the crushing effect and crushing efficiency of the oyster shell material.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An oyster shell powder processing and crushing device, characterized in that: include: A casing (1), the casing (1) being provided with a crushing chamber (101), and a plurality of corresponding filter material holes being provided at the bottom of the crushing chamber (101); The crushing mechanism (2) comprises a group of crushing rollers (201) rotatably mounted in the crushing chamber (101), the crushing rollers (201) being driven to rotate by corresponding driving mechanisms (202), a group of the crushing rollers (201) having outer side walls fixedly connected in parallel with a plurality of rows of corresponding crushing protrusions (203), and the crushing protrusions (203) on different crushing rollers (201) being arranged in a staggered manner; The crushing material reinforcement mechanism (3) comprises a fixed support member (301) coaxially installed in the crushing material drum (201), wherein the fixed support member (301) is respectively inwardly fixedly connected with an arc-shaped limit plate (302) adapted to the crushing material protrusion (203), and the arc-shaped limit plate (302) is respectively fixedly connected with a corresponding ultrasonic transducer (303), and the ultrasonic transducer (303) is respectively connected to an external ultrasonic generator; the crushing material protrusion (203) ) are respectively hollowly arranged and fixedly installed with corresponding abutment members (4), the outer ends of the abutment members (4) are respectively fixedly connected to the crushing protrusions (203), the middle sections of the abutment members (4) are spaced apart from the crushing protrusions (203), and the inner ends of the abutment members (4) are contacted with the arc-shaped limiting plate (302) when rotating through the arc-shaped limiting plate (302), and the ultrasonic vibration is transmitted to the ends of the crushing protrusions (203) through the abutment members (4).

2. The oyster shell powder processing and crushing equipment according to claim 1, characterized in that: The inner end of the abutment member (4) is respectively provided with a corresponding spherical mounting groove inwardly, and a corresponding supporting ball (5) is rollingly mounted in the spherical mounting groove. When the inner end of the abutment member (4) rotates and passes through the arc-shaped limiting plate (302), the supporting ball (5) comes into contact with the arc-shaped limiting plate (302).

3. The oyster shell powder processing and crushing equipment according to claim 2, characterized in that: The inner end of the abutment member (4) is fixedly connected to an annular fixing member (6) for limiting the support ball (5) by means of threaded connection, and the inner end of the support ball (5) extends to the inner side of the annular fixing member (6).

4. The oyster shell powder processing and crushing equipment according to claim 3 is characterized in that: A supporting gasket (7) made of engineering plastic is fixedly installed in the spherical installation groove.

5. The oyster shell powder processing and crushing equipment according to claim 1, characterized in that: The driving mechanism (202) comprises a driving shaft (2021) fixedly connected to the shredder drum (201), and the driving shaft (2021) is respectively connected to the output shaft end of the corresponding driving motor (223) through a corresponding reducer (2022).

6. The oyster shell powder processing and crushing equipment according to claim 1, characterized in that: The middle sections of the abutment members (4) are respectively sleeved with corresponding buffer pads (8), and the buffer pads (8) are respectively fixed between the crushed material protrusions (203) and the abutment members (4) in an extruded state.

7. The oyster shell powder processing and crushing equipment according to claim 6, characterized in that: The outer end of the abutment member (4) is connected to the crushing material protrusion (203) by means of a threaded connection.

8. The oyster shell powder processing and crushing equipment according to claim 7, characterized in that: The buffer pad (8) is made of rubber material, and a plurality of corresponding vibration-damping grooves (801) are respectively arranged in a spiral state at the periphery of the buffer pad (8), the rotation direction of the vibration-damping grooves (801) being consistent with the screw connection direction of the abutment member (4) and the crushed material protrusion (203), and after the abutment member (4) is screwed onto the crushed material protrusion (203), the vibration-damping grooves (801) are compressed and closed to form vibration-damping holes.

9. A method for processing and crushing oyster shell powder, based on the oyster shell powder processing and crushing equipment according to any one of claims 1 to 8, characterized in that: The following specific steps are included: S1, the driving mechanism (202) is started to drive the crushing drum (201) provided with the crushing protrusion (203) to rotate; S2, the external ultrasonic generator is started, the ultrasonic transducer (303) generates ultrasonic vibration, and the ultrasonic vibration is transmitted to the arc-shaped limiting plate (302); S3, continuously feeding oyster shell material into the crushing chamber (101) of the housing (1) of the crushing device; S4, as the crushing drum (201) rotates, the crushing projection (203) rotates accordingly to break the oyster shell material; S5, when the inner end of the abutment member (4) rotates through the arc-shaped limit plate (302) and comes into contact with the arc-shaped limit plate (302), the ultrasonic vibration is transmitted to the crushing protrusion (203) through the arc-shaped limit plate (302), so that the crushing protrusions (203) between a group of crushing rollers (201) generate obvious ultrasonic vibration when they are close to each other, so as to form efficient grinding and crushing of the material; S6, materials with a particle size smaller than the filter holes of the pulverizing chamber (101) are discharged through the filter holes, and materials with a particle size larger than the filter holes continue to be pulverized in steps S4-S5.

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