Crushing-grading multifunctional unit

Abstract

The invention provides a novel superfine grinding and grading multifunctional unit, and belongs to the technical field of superfine grinding and grading devices. The device comprises a jet mill, a mechanical mill and an air classifier. The turbine grading chamber assembly is a shared part and is respectively communicated with an airflow crushing chamber assembly at the lower part of the airflow crusher or a mechanical crushing chamber assembly at the lower part of the mechanical crusher or an air grading chamber assembly at the lower part of the air classifier to respectively form the airflow crusher, the mechanical crusher and the air classifier; then, the machine frame, the cyclone trapping device and the feeding device are combined to form a unit; according to the invention, the crushing efficiency can be greatly improved, the energy consumption is reduced, the labor is saved, the cost is reduced, and higher and more complicated requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrafine grinding and classification devices, and in particular to a multifunctional grinding and classification unit, and in particular to a combined new type of ultrafine grinding-classification multifunctional unit having the advantages of an air flow grinder, a mechanical grinder and an air classifier, i.e. a three-in-one unit. Background Art

[0002] With the rapid development of modern science and technology, traditional pulverizing processes and equipment can no longer meet the increasingly high requirements for the particle size and precision of pulverized products. Many industries continue to use a variety of ultra-fine powder materials to improve product quality and promote product upgrading to meet the needs of fierce market competition.

[0003] In ultrafine grinding technology, airflow grinding is currently recognized as a mechanical grinding method that can effectively obtain the smallest particles, and is an indispensable and important means for modern powder processing industry. Airflow grinding can not only produce ultrafine powder, but also has the advantages of narrow product particle size distribution, high uniformity, easy to control particle shape, good product dispersibility, and no grinding body wear pollution.

[0004] Ultrafine powders have strong activity and show unique physical and chemical properties due to their small particles and large specific surface area. As a result, the magnetic properties, thermal properties, catalytic properties and adsorption properties change significantly as the particles become smaller, and performance effects that bulk materials do not have appear. The prices of cheap mineral products and chemical products increase abnormally as their uses expand after ultrafine processing, and their added value increases several times or even dozens of times.

[0005] Air flow mills are widely used in the pollution-free dry ultrafine grinding industry. In the existing technology, this type of unit has certain requirements and restrictions on the materials used. Usually, the feed fineness must be above 325 mesh to be economical. Excessively coarse materials need to go through multiple grinding processes to meet the requirements, so the energy consumption and cost are relatively high.

[0006] During the ultrafine grinding process, as the grinding time increases, the particle size of the material gradually decreases; at the same time, the specific surface area of ​​the material gradually increases, and the specific surface energy also increases. Therefore, the tendency of fine particles to agglomerate with each other gradually increases. After a certain period of time, the ultrafine grinding is in a dynamic equilibrium process of grinding and agglomeration. In this state, even if the grinding time is extended, it is difficult to grind the product finer, and sometimes even the apparent particle size of the product becomes coarser. This is the phenomenon of over-grinding.

[0007] Due to the large variety of powder materials and their different characteristics, the air flow mill unit cannot meet the user's more complex and higher requirements for crushing, grading, etc. Summary of the invention

[0008] In view of this, in order to solve the deficiencies in the prior art, the present invention provides a multifunctional ultrafine powder unit, which uses a turbine classification chamber assembly as a common part through simple disassembly and assembly: the turbine classification chamber assembly is respectively connected with the air flow grinding chamber assembly at the bottom of the air flow grinder or the mechanical grinding chamber assembly at the bottom of the mechanical grinder or the air classification chamber assembly at the bottom of the air classifier, respectively forming an air flow grinder, a mechanical grinder and an air classifier; and then combined with a frame, a cyclone capture device and a feeding device to form three sets of grinding and classification units with different functions; it can greatly improve the grinding efficiency, reduce energy consumption, save labor, reduce costs, and is suitable for higher and more complex requirements.

[0009] To achieve the above object, the present invention provides the following technical solutions: A new type of ultra-fine grinding and classification multifunctional unit, characterized in that it comprises: an air flow grinder, a mechanical grinder and an air classifier.

[0010] The air flow pulverizer is a fluidized bed supersonic air flow pulverizer, the mechanical pulverizer is an ultra-fine mechanical pulverizer, and the classifier is an air classifier; The turbine classification chamber assembly is a common part: the turbine classification chamber assembly is respectively connected with the air flow pulverizing chamber assembly at the bottom of the air flow pulverizer, the mechanical pulverizing chamber assembly at the bottom of the mechanical pulverizer, or the air classification chamber assembly at the bottom of the air classifier, respectively forming the air flow pulverizer, the mechanical pulverizer and the air classifier; and then combined with the frame, the cyclone collection device, and the feeding device to form a unit; The turbine classifier assembly includes: A classification chamber, in which a classification wheel and an exhaust pipe are arranged; The classifying wheel is a horizontal classifying wheel, which is arranged on the classifying motor and is used to separate the materials into coarse and fine parts; A first driving device, which is used to drive the classifying wheel to rotate, so as to drive the classifying wheel to classify the material; An exhaust pipe, which is connected to the turbine classification chamber and is used to discharge qualified fine powder; The turbine classification chamber is provided with a feed inlet, on which an air flow nozzle is provided for forced feeding of materials below the classification chamber; The material is transported to the feed port through a screw feeder; A first air seal is provided between the classifying wheel and the exhaust pipe to prevent coarse powder from entering the exhaust pipe; The bearings in the grading motor are equipped with air seal protection devices in front to prevent micro powder from entering the bearings; The fluidized bed supersonic airflow pulverizer includes an airflow pulverizing chamber assembly, and the airflow pulverizing chamber assembly includes: A first pulverizing chamber, on which a pulverizing nozzle for pulverizing materials is disposed; The high-speed jet flow generated by the crushing nozzle under the action of compressed air forms a centripetal reverse jet flow field at the bottom of the crushing chamber. Under the action of pressure difference, the materials at the bottom of the mill are fluidized. The accelerated materials converge at the intersection of the nozzles, generating violent impact, collision, friction and crushing. There are four crushing nozzles, which are evenly distributed on the side wall of the first crushing chamber; The ultra-fine mechanical pulverizer includes a mechanical pulverizing chamber assembly, and the mechanical pulverizing chamber assembly includes: Mechanical crushing chamber, which is equipped with a moving disc, crushing hammer, tooth plate, etc. A crushing hammer, which is arranged on the outer periphery of the moving disc and is used to crush materials; A tooth plate, which is arranged on the inner wall of the grinding chamber and is used for grinding materials; The second driving device is used to drive the moving disc to rotate, driving the crushing hammer to crush the material; The bearings in the grinding motor are equipped with air seal protection devices in front to prevent the micro powder from entering the bearings; The air classifier includes a classifying chamber assembly, which includes: a classifying middle cylinder, a classifying lower cylinder, an air screen cylinder, air screen blades, a feeding hopper, a sanitary manual butterfly valve and a collecting cylinder; An air screen cylinder body, in which air screen blades are arranged; The wind screen blade is arranged on the outer periphery of the wind screen blade base and is used for secondary classification of materials; The capture device includes a cyclone separator and a pulse bag collector connected to the crusher and the classifier, which are used to recover the exhaust gas emitted by the material and maintain the stable flow of the airflow in the system. The purified air collected by the collector is discharged outside the machine by the ventilator.

[0011] The present invention provides a novel multifunctional ultrafine grinding and classification unit, in particular, a combined multifunctional novel ultrafine grinding and classification unit having the advantages of air flow pulverizer, mechanical pulverizer and air classifier. This unit is a combination device integrating fluidized bed air flow pulverizer, mechanical micro powder machine and air classifier. The whole set of equipment is composed of three independent devices, and only one module under the turbine classification component needs to be replaced to become three independent devices. After simple disassembly and assembly, it can be used as a fluidized bed air flow pulverizer unit, a mechanical micro powder machine unit and an air classification unit respectively to meet the user's more complex and higher requirements for crushing and classification (i.e., large feed particle size, low energy consumption, pre-classification and over-crushing phenomenon); it is a new type of combined unit with excellent performance, economy and practicality.

[0012] Compared with the existing technology, it can greatly improve the crushing efficiency, reduce energy consumption, save labor, reduce costs, and is suitable for more complex and higher requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a front view of the multifunctional crushing-classifying unit (three-in-one unit) of the present invention; Figure 2 It is a left view of the multifunctional crushing-classifying unit (three-in-one unit) of the present invention; Figure 3 It is a top view of the multifunctional crushing-classifying unit (three-in-one unit) of the present invention; Figure 4 The structural diagram of the main engine upper part - turbine classification chamber assembly; Figure 5 This is the structural diagram of the lower part of the main machine - the airflow crushing chamber assembly; Figure 6 This is the structural diagram of the lower part of the main machine - the mechanical crushing chamber assembly; Figure 7 It is a structural diagram of the lower part of the main engine - the air classification chamber assembly; Figure 8 The left side view of the lower part of the main engine - the air classification chamber assembly; In the figure, 1. PLC touch screen, 2. screw feeder, 3. turbine classification chamber assembly, 31. upper cover, 32. turbine classification chamber, 33. exhaust pipe, 34. classification wheel, 35. classification motor, 4. air flow crushing chamber assembly, 41. first air flow crushing chamber, 42. nozzle, 43. lower cover, 44. plug, 5. electric control box, 6. directional casters, 7. universal casters, 8. piping, 9. first cyclone separator assembly, 10. second cyclone separator assembly, 11. collector assembly, 12. air bag distribution pipe assembly, 13. frame, 14. vortex air pump, 15. clamp, 16. sanitary ball valve, 17. barrel assembly, 18. storage cabinet, 19. mechanical crushing chamber assembly, 191. mechanical crushing chamber, 192. tooth plate, 193. crushing hammer, 194. moving plate, 195. crushing motor, 20. air classification chamber assembly, 201. In the air classification chamber, 202. Wind screen blades, 203. Wind screen cylinder, 204. Under the air classification chamber, 205. Feeding hopper, 206. Primary air gate valve, 207. Secondary air gate valve, 208. Sanitary ball valve for classifier, 209. Barrel assembly for classifier. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] like Figure 1 As shown, the present invention provides a novel multifunctional ultrafine pulverizing and classifying unit, in particular, a combined multifunctional novel ultrafine pulverizing and classifying unit having the advantages of a jet pulverizer, a mechanical pulverizer and an air classifier.

[0018] Wherein, the air flow pulverizer is a fluidized bed supersonic air flow pulverizer, the mechanical pulverizer is an ultra-fine mechanical pulverizer, and the classifier is an air classifier.

[0019] The present invention provides a specific embodiment of a multifunctional ultrafine grinding and classification unit, which includes a turbine classification chamber component 3; The turbine classification chamber assembly 3 is a common part: the turbine classification chamber assembly 3 is respectively connected with the air flow pulverizing chamber assembly 4 at the bottom of the air flow pulverizer, the mechanical pulverizing chamber assembly 19 at the bottom of the mechanical pulverizer, or the air classification chamber assembly 20 at the bottom of the air classifier, respectively forming an air flow pulverizer, a mechanical pulverizer, and an air classifier; and then combined with the first-stage cyclone separator assembly 9, the second-stage cyclone separator assembly 10, the collector assembly 11, the air bag distribution pipe assembly 12, the frame 13, the vortex air pump 14, the sanitary ball valve 16, the barrel assembly 17, the storage cabinet 18, etc. to form a unit; The turbine classification chamber assembly 3 is mounted on the upper surface of the frame with screws, and the air flow crushing chamber assembly 4, the mechanical crushing chamber assembly 19, and the air classification chamber assembly 20 are respectively mounted on the turbine classification chamber assembly 3 with screws, forming three different processing forms; The turbine classification chamber assembly 3 includes: an upper cover 31, a turbine classification chamber 32, an exhaust pipe 33, and a classification wheel 34; A turbine classification chamber 32, in which a classification wheel 34, an exhaust pipe 33, etc. are arranged; The classifying wheel 34 is a horizontal classifying wheel 34, which is arranged on the classifying motor 35 and is used to separate the materials into coarse and fine parts; A first driving device, which is used to drive the classifying wheel 34 to rotate, so as to drive the classifying wheel 34 to classify the material; The exhaust pipe 33 is communicated with the turbine classification chamber 32 and is used to discharge qualified fine powder.

[0020] A feed inlet is provided at the lower side of the turbine classification chamber 32, and a jet hopper assembly is provided on the feed inlet for forcibly feeding materials below the classification chamber.

[0021] The material is transported to the injection hopper through the screw feeder 2.

[0022] A first air seal is provided between the classifying wheel 34 and the exhaust pipe 33 to prevent coarse powder from entering the exhaust pipe.

[0023] The bearings in the grading motor 35 are provided with air seal protection devices in front to prevent the fine powder from entering the bearings.

[0024] The present invention provides a specific embodiment of a fluidized bed supersonic airflow pulverizing unit, which includes an airflow pulverizing chamber assembly 4, wherein the airflow pulverizing chamber assembly 4 includes: a first airflow pulverizing chamber 41, a pulverizing nozzle 42, a lower cover 43, and a plug 44; A first air flow pulverizing chamber 41, on which a pulverizing nozzle 42 for pulverizing materials is disposed; The high-speed jet flow generated by the crushing nozzle 42 under the action of compressed air forms a centripetal reverse jet flow field at the lower part of the crushing chamber 41. Under the action of the pressure difference, the material at the bottom of the mill is fluidized, and the accelerated material converges at the intersection of the nozzle, generating violent impact, collision, friction and crushing.

[0025] There are four crushing nozzles 42 , which are evenly distributed on the side wall of the first crushing chamber 41 .

[0026] The working principle of fluidized bed supersonic airflow pulverizer is as follows: The material is forcibly fed into the lower part of the first air flow pulverizing chamber 41 by means of air jets from the pulverizing nozzle 42 and enters the pulverizing zone. The compressed air is rapidly expanded and accelerated through the pulverizing nozzle to generate a high-speed jet flow that forms a centripetal reverse jet flow field at the lower part of the pulverizing chamber 41. Under the action of the pressure difference, the material at the bottom of the mill is fluidized, and the accelerated material converges at the intersection of the nozzle, generating violent impact, collision, and friction to cause pulverization. The crushed material moves with the rising air flow to a certain height above the turbine classification chamber 32. After the coarse particles stall, they fall back to the lower part of the grinding chamber along the wall of the grinding chamber under the action of gravity. The fine powder moves with the air flow to the upper classification wheel 34 for classification. In the forced eddy field generated by the high-speed turbine, the fine particles are thrown to the vicinity of the cylinder wall under the action of centrifugal force, and fall back to the lower part of the grinding chamber together with the stalled coarse powder for further crushing. The fine powder that meets the fineness requirements is transported to the cyclone separator through the classification wheel groove flow channel and the exhaust pipe as a product collection. A small amount of fine powder is further separated from the gas and solid by the capture device, and the purified air is discharged out of the machine by the induced draft fan.

[0027] The unique feature of fluidized bed jet mill is that it changes the linear and surface impact crushing of traditional jet mill into spatial three-dimensional impact crushing, and utilizes the high-speed jet energy generated by the jet impact in the material flow of the crushing chamber, so that the gas-solid crushing and graded circulation flow effect similar to the fluidized state is produced in the mill chamber, improving the impact crushing efficiency and the comprehensive effective utilization rate of energy. This machine also places the impact crushing area and the gas-solid flow zone in the middle space of the crushing chamber, avoiding the abrasion of the inner wall of the mill chamber caused by the impact of the high-speed material flow, which greatly improves the most serious wear problem of the jet impact mill from the fundamental structural design. In addition to crushing a variety of materials that can be crushed by traditional jet mills, the fluidized bed jet mill is also particularly suitable for ultra-fine crushing of high-hardness materials and anti-pollution materials. Therefore, it truly reflects the excellent performance and excellent quality of high-tech products in terms of principle, structure, performance and use.

[0028] The present invention provides a specific embodiment of an ultra-fine mechanical pulverizing unit, which includes a mechanical pulverizing chamber component 19, and the mechanical pulverizing chamber component 19 includes: A mechanical crushing chamber 191, in which a moving plate 194, a crushing hammer 193, a tooth plate 192, etc. are arranged; A crushing hammer 193, which is arranged on the outer periphery of the moving plate 194 and is used for crushing materials; A tooth plate 192, which is disposed on the inner wall of the grinding chamber 191 and is used for grinding materials; The second driving device is used to drive the moving plate 194 to rotate, thereby driving the crushing hammer 193 to crush the materials.

[0029] The bearings in the grinding motor 195 are provided with an air seal protection device in front to prevent the fine powder from entering the bearings.

[0030] The working principle of the ultra-fine mechanical pulverizer unit is as follows: After the material passes through the screw feeder 2, it is forced to be fed at the bottom of the crushing chamber through the air flow nozzle in the form of air flow jet and enters the crushing area. The material to be crushed is sent to the crushing chamber 191 and is crushed under the high-speed impact and grinding action of the crushing hammer 193. The crushed material is transported to the classifying wheel 34 for classification under the action of air flow. Qualified fine powder is discharged from the exhaust pipe together with the exhaust gas and then collected as a product, and the coarse particle material is returned to the crushing chamber 191 for further crushing.

[0031] The easily worn parts of this machine, such as the impact hammer and tooth plate, are made of high-hardness wear-resistant materials and are easy to replace. The fineness of the product can be adjusted by adjusting the speed of the turbine classifier.

[0032] The present invention provides a specific embodiment of an air classification unit, which includes an air classification chamber assembly 20, wherein the mechanical crushing chamber assembly 20 includes: an air classification chamber middle 201, an air screen blade 202, an air screen cylinder 203, an air classification chamber lower 204, a feeding hopper 205, a sanitary ball valve 208 for a classifier, and a barrel assembly 209 for a classifier; The wind screen cylinder 203 has wind screen blades 202 disposed therein; The wind screen blade 202 is arranged on the outer periphery of the wind screen blade base and is used for secondary classification of materials; The working principle of the air classification unit is as follows: The material is added from the hopper, and the regulating air valve of the primary air inlet is opened. The material is transported into the classification chamber by negative pressure, and is dispersed and classified beside the horizontal classification wheel; the coarse powder is thrown to the cylinder wall and moves downward, and is affected by the secondary air at the wind grid cylinder and the primary air blowing of the central tube. The fine powder is separated from the coarse powder again and sent to the classification wheel for classification again; the fine powder passes through the gap of the classification impeller and is sent out of the machine through the exhaust pipe. The exhaust gas in the collector is pumped into the atmosphere by the vortex air pump. The coarse powder finally moves downward, through the lower cylinder, connecting pipes, and manual butterfly valve, and falls into the collection barrel.

[0033] The air classifier unit has the functions of pre-classification and inspection classification. The qualified fine particles in the raw materials are directly discharged after classification, which helps to improve the crushing efficiency. The built-in classification method can not only ensure the fineness of the product, but also improve the crushing efficiency and reduce energy consumption.

[0034] The ultrafine pulverizer provided by the present invention adopts a built-in classification system, which is mainly a combination machine integrating pulverization and classification. Qualified fine powder can be classified in the machine and then discharged out of the machine, avoiding over-pulverization. Coarse powder is automatically recycled in the machine and repeatedly pulverized, improving the pulverization efficiency.

[0035] In the present invention, the classification of micro powders of different finenesses is achieved by controlling the rotation speed of the classification wheel 34, and the specific rotation speed can be controlled according to actual needs.

[0036] In the present invention, the crushing chamber assembly and the grading chamber assembly are assembled in modular form, which is very convenient for use, maintenance, cleaning, disassembly, etc. In the invention, the whole system operates under negative pressure, has good airtightness, is environmentally friendly and dust-free; and does not cause product pollution. In the type of the present invention, the unit adopts a PLC touch screen 1 (rotatable), and the startup interface includes 3 sets of process flows. The corresponding process button can be selected and the operation can be performed after clicking; PLC programming control realizes production automation control.

[0037] The invention has the advantages of compact structure, small floor space, simple and beautiful appearance, simple operation, stable operation and excellent production environment.

[0038] In the present invention, the capture device includes a cyclone separator and a pulse bag collector (which is used to recover the exhaust gas emitted by the material and maintain the stable flow of the airflow in the system) connected to the above-mentioned crushing and classifying machines. The purified air collected by the collector is discharged outside the machine by the ventilator.

[0039] It should be noted that, as a preferred embodiment, the above-mentioned air flow pulverizer, mechanical pulverizer, and air classifier can all be installed on a frame 13 with a moving device to facilitate their movement.

[0040] The above are only preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of ultra-fine grinding and grading multifunctional unit; characterized in that: include: Air jet mills, mechanical mills and air classifiers; The air flow pulverizer is a fluidized bed supersonic air flow pulverizer, the mechanical pulverizer is an ultra-fine mechanical pulverizer, and the classifier is an air classifier; The turbine classification chamber assembly is a common part: the turbine classification chamber assembly is respectively connected with the air flow pulverizing chamber assembly at the bottom of the air flow pulverizer, the mechanical pulverizing chamber assembly at the bottom of the mechanical pulverizer, or the air classification chamber assembly at the bottom of the air classifier, respectively forming the air flow pulverizer, the mechanical pulverizer and the air classifier; and then combined with the frame, the cyclone collection device, and the feeding device to form a unit; The turbine classifier assembly includes: A classification chamber, in which a classification wheel and an exhaust pipe are arranged; The classifying wheel is a horizontal classifying wheel, which is arranged on the classifying motor and is used to separate the materials into coarse and fine parts; A first driving device, which is used to drive the classifying wheel to rotate, so as to drive the classifying wheel to classify the material; An exhaust pipe, which is connected to the turbine classification chamber and is used to discharge qualified fine powder; The turbine classification chamber is provided with a feed inlet, on which an air flow nozzle is provided for forced feeding of materials below the classification chamber; The material is transported to the feed port through a screw feeder; A first air seal is provided between the classifying wheel and the exhaust pipe to prevent coarse powder from entering the exhaust pipe; The bearings in the grading motor are equipped with air seal protection devices in front to prevent micro powder from entering the bearings; The fluidized bed supersonic airflow pulverizer includes an airflow pulverizing chamber assembly, and the airflow pulverizing chamber assembly includes: A first pulverizing chamber, on which a pulverizing nozzle for pulverizing materials is disposed; The high-speed jet flow generated by the crushing nozzle under the action of compressed air forms a centripetal reverse jet flow field at the bottom of the crushing chamber. Under the action of pressure difference, the materials at the bottom of the mill are fluidized. The accelerated materials converge at the intersection of the nozzles, generating violent impact, collision, friction and crushing. There are four crushing nozzles, which are evenly distributed on the side wall of the first crushing chamber; The ultra-fine mechanical pulverizer includes a mechanical pulverizing chamber assembly, and the mechanical pulverizing chamber assembly includes: Mechanical crushing chamber, which is equipped with a moving disc, crushing hammer, tooth plate, etc. A crushing hammer, which is arranged on the outer periphery of the moving disc and is used to crush materials; A tooth plate, which is arranged on the inner wall of the grinding chamber and is used for grinding materials; The second driving device is used to drive the moving disc to rotate, driving the crushing hammer to crush the material; The bearings in the grinding motor are equipped with air seal protection devices in front to prevent the micro powder from entering the bearings; The air classifier includes a classifying chamber assembly, which includes: a classifying middle cylinder, a classifying lower cylinder, an air screen cylinder, air screen blades, a feeding hopper, a sanitary manual butterfly valve and a collecting cylinder; An air screen cylinder body, in which air screen blades are arranged; The wind screen blade is arranged on the outer periphery of the wind screen blade base and is used for secondary classification of materials; The capture device includes a cyclone separator and a pulse bag collector connected to the crusher and the classifier, which are used to recover the exhaust gas emitted by the material and maintain the stable flow of the airflow in the system. The purified air collected by the collector is discharged outside the machine by the ventilator.

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