Vertical pulverizer

Abstract

The vertical pulverizer comprises a pulverizing chamber, a pulverizing disc located in the pulverizing chamber, a rotary driving mechanism in transmission connection with the pulverizing disc, a feeding structure, a discharging structure and an air inlet structure, and a pulverizing structure is arranged between the edge of the pulverizing disc and the area, corresponding to the outer edge, of the inner wall of the pulverizing chamber; a feeding port of the feeding structure is formed below the smashing disc, and a material winnowing channel is formed between the feeding port and the smashing structure. Materials entering the material winnowing channel through the feeding port are in contact with and mixed with airflow entering the material winnowing channel through the air inlet structure, the materials are divided into suspended phase particles and settled phase particles, and the suspended phase particles are carried by the airflow to enter the smashing structure from bottom to top to be smashed. And the settled phase particles are settled downwards under the action of gravity and are gradually separated from the suspended phase particles. The problem that the weight sizes of particles of materials input into the crushing chamber are different is solved.

Description

Technical Field

[0001] The invention relates to a vertical pulverizer, in particular to a vertical superfine pulverizer. Background Art

[0002] Vertical shaft ultrafine pulverizer (reference: patent authorization announcement number is CN212348945U) is mainly used in various large, medium and small feed factories for ultrafine pulverization of various coarse powder materials to achieve the required ultrafine particle size. The structure of the existing vertical shaft ultrafine pulverizer includes a pulverizing chamber, a pulverizing disk horizontally arranged in the pulverizing chamber, a rotating drive mechanism connected to the pulverizing disk, and a feeding structure, a discharging structure and an air intake structure respectively communicated with the pulverizing chamber. A pulverizing structure (usually including a hammer head arranged at the edge of the pulverizing disk and a gear ring arranged in an area corresponding to the edge on the inner wall of the pulverizing chamber) is provided between the edge of the pulverizing disk and the area corresponding to the edge on the inner wall of the pulverizing chamber. When working, the pulverizing disk is driven to rotate in the pulverizing chamber by the rotating drive mechanism, so that the material transported to the pulverizing structure through the feeding structure is pulverized by the pulverizing structure. The rotation centerline of the pulverizing disk is vertically arranged when rotating. The feeding port of the feeding structure (usually a screw feeder) is arranged above the pulverizing disk. The air intake structure is used to introduce an upward airflow into the lower part of the pulverizing chamber. The discharging structure (usually including a material grading mechanism and a discharging chamber) is located at the upper part of the pulverizing chamber and is used to discharge the pulverized material out of the vertical pulverizer by the airflow introduced into the pulverizing chamber from the air intake structure.

[0003] The working principle of the above-mentioned vertical shaft ultrafine pulverizer is as follows: a pulverizing disk is arranged in the pulverizing chamber, a plurality of hammers are arranged at intervals at the circumferential edge of the pulverizing disk, a gear ring is arranged in the radial outer area of ​​the pulverizing disk, the pulverizing disk drives the hammer to rotate at a high speed, and the material falls downward into the space between the hammer and the gear ring through the feed port of the feed structure. Thereafter, the material is crushed under the impact of the high-speed hammer and the friction and shearing action between the hammer and the gear ring, and the pulverized material enters the material grading mechanism (usually a material grading wheel is used) for grading, and the qualified pulverized material is carried by the airflow through the material grading wheel and sent away through the discharge chamber, and the unqualified pulverized material falls onto the high-speed rotating pulverizing disk, and the material on the pulverizing disk is thrown between the gear ring and the hammer under the action of centrifugal force, and is hit by the hammer again and rubbed and sheared between the hammer and the gear ring.

[0004] The existing vertical shaft type ultrafine pulverizer has such a technical problem: the particle weights of the materials input into the crushing chamber by the feeding structure are different. For example, the weight of some large particles is heavier than that of small particles, which easily causes the heavy particles to directly "smash" on the hammer head or the gear ring, causing the crushing structure to be damaged too quickly. In response to similar problems, a vertical ultrafine pulverizer is provided in the Chinese patent document with publication number CN105597876A, which has modified the feeding structure and set a gravity impurity removal device in the feeding structure so that particles of different weights can be separated in advance before entering the crushing chamber. However, the separation method adopted by the gravity impurity removal device is easily affected by factors such as the feeding speed and the water content of the material, and the separation effect is not well guaranteed. In addition, the separation accuracy of the gravity impurity removal device is not high. Summary of the invention

[0005] The purpose of the present invention is to provide an improved vertical pulverizer to solve the technical problem mentioned in the above background technology that the particle weights of the materials input into the pulverizing chamber by the feeding structure are different.

[0006] To this end, a vertical crusher is provided, comprising a crushing chamber, a crushing disc located in the crushing chamber, a rotating drive mechanism drivingly connected to the crushing disc, and a feeding structure, a discharging structure and an air intake structure respectively connected to the crushing chamber. A crushing structure is provided between the edge of the crushing disc and the area on the inner wall of the crushing chamber corresponding to the edge. When working, the crushing disc is driven to rotate in the crushing chamber by the rotating drive mechanism, so that the material transported to the crushing structure through the feeding structure is crushed by the crushing structure. The rotation centerline of the crushing disc is vertically arranged when rotating. The air intake structure is used to introduce an upward airflow into the lower part of the crushing chamber. The discharging structure is located at the upper part of the pulverizing chamber and is used to discharge the pulverized material from the vertical pulverizer by the airflow introduced into the pulverizing chamber from the air intake structure, wherein the feed port of the feed structure is arranged below the pulverizing disk, and a material air selection channel is formed between the feed port and the pulverizing structure. The material entering the material air selection channel through the feed port is contacted and mixed with the airflow entering through the air intake structure, and these materials are divided into suspended phase particles and settled phase particles. The suspended phase particles enter the pulverizing structure from bottom to top under the carry of the airflow for pulverization, and the settled phase particles settle downward under the action of gravity and are gradually separated from the suspended phase particles.

[0007] The above-mentioned vertical crusher arranges the feed port of the feed structure below the crushing disk and forms a material air selection channel between the feed port and the crushing structure, so that the material is contacted and mixed with the upward flowing airflow, thereby naturally separating the material into suspended phase particles and settled phase particles: the lighter suspended phase particles are carried upward by the airflow into the crushing structure for crushing, and the heavier settled phase particles are settled and separated under the action of gravity, thereby avoiding the situation where the heavier particles directly "smash" the hammer head or the gear ring and cause the crushing structure to be damaged too quickly, effectively preventing foreign matter from entering the crushing chamber and wearing the crushing structure, and reducing the change in air volume caused by the wear of the crushing structure. At the same time, compared with the gravity impurity removal device used in the prior art, the method of utilizing natural sorting of airflow in the present invention is not easily affected by the feed speed and the moisture content of the material, is easier to control the separation effect, and has higher separation accuracy.

[0008] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages provided by the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings constituting a part of this specification are used to assist the understanding of the present invention. The contents provided in the drawings and the related descriptions in this specification can be used to explain the present invention, but do not constitute improper limitations on the present invention.

[0010] Figure 1 This is an appearance diagram of a vertical crusher according to Embodiment 1 of the present invention.

[0011] Figure 2 for Figure 1 A cross-sectional view of a vertical mill is shown.

[0012] Figure 3 for Figure 2 A partial enlarged view of the material air selection channel.

[0013] Figure 4 for Figure 1 Schematic diagram of the structure of the guide plate in the vertical crusher shown.

[0014] Figure 5 It is a bottom schematic diagram of the supporting base in the vertical crusher of the second embodiment of the present invention.

[0015] Figure 6 It is a cross-sectional view of a vertical crusher according to the third embodiment of the present invention.

[0016] Figure 7 for Figure 6 Schematic diagram of the internal structure of the lower chamber of the vertical crusher shown.

[0017] Marked in the figure are: 1-crushing chamber, 2-crushing disc, 3-rotating drive mechanism, 4-feeding structure, 41-feeding port, 5-discharging structure, 6-air inlet structure, 61-air inlet, 611-first air inlet portion, 7-upper horizontal partition, 71-through hole, 711-first through hole portion, 712-second through hole portion, 713-third through hole portion, 8-lower horizontal partition, 9-upper chamber, 10-lower chamber, 11-hammer head, 12-gear ring, 13-support base, 131-air inlet channel, 14-sedimentation phase particle recovery trough, 141-opening, 15-lower chamber partition plate. DETAILED DESCRIPTION

[0018] The present invention is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that: The technical solutions and technical features provided in each section, including the following description, can be combined with each other without conflict. In addition, where possible, these technical solutions, technical features and related combinations can be assigned specific technical themes and protected by relevant patents.

[0019] The embodiments of the present invention involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of patent protection.

[0020] The terms "include", "comprises", "have" and any variations thereof in this specification and the corresponding claims and related parts are intended to cover non-exclusive inclusions. Other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0021] Figure 1 This is an appearance diagram of a vertical crusher according to Embodiment 1 of the present invention. Figure 2 for Figure 1 A cross-sectional view of a vertical mill is shown. Figure 3 for Figure 2 A partial enlarged view of the material air selection channel. Figure 4 for Figure 1 The schematic diagram of the structure of the guide plate in the vertical crusher is shown in FIG. Figure 1-Figure 4As shown, a vertical crusher of the first embodiment comprises a crushing chamber 1, a crushing disc 2 horizontally arranged in the crushing chamber 1, a rotating drive mechanism 3 drivingly connected to the crushing disc 2, and a feeding structure 4 (specifically a screw feeder), a discharging structure 5 (including a material grading mechanism and a discharging chamber) and an air intake structure 6 respectively connected to the crushing chamber 1, a crushing structure is provided between the edge of the crushing disc 2 and the area on the inner wall of the crushing chamber 1 corresponding to the edge (specifically, the crushing structure comprises a hammer head 11 arranged at the edge of the crushing disc 2 and a gear ring 12 arranged in the area on the inner wall of the crushing chamber 1 corresponding to the edge, and a radial gap is formed between the hammer head 11 and the gear ring 12), when working, the crushing disc 2 is driven to rotate in the crushing chamber 1 by the rotating drive mechanism 3, so that the material transported to the crushing structure through the feeding structure 4 is crushed by the crushing structure, The rotation centerline of the pulverizing disk 2 is vertically arranged during the rotation, the air intake structure 6 is used to introduce an upward airflow into the lower part of the pulverizing chamber 1, the discharging structure 5 is located at the upper part of the pulverizing chamber 1 and is used to discharge the pulverized material out of the vertical pulverizer by the airflow introduced into the pulverizing chamber 1 from the air intake structure 6, the feed port 41 of the feed structure 4 is arranged below the pulverizing disk 2, a material air selection channel is formed between the feed port 41 and the pulverizing structure, the material entering the material air selection channel through the feed port 41 is contacted and mixed with the airflow entering through the air intake structure 6, and these materials are divided into suspended phase particles and settled phase particles, the suspended phase particles are carried by the airflow into the pulverizing structure from bottom to top for pulverization (the radial gap is connected to the material air selection channel), and the settled phase particles settle downward under the action of gravity and are gradually separated from the suspended phase particles.

[0022] The above-mentioned vertical crusher arranges the feed port 41 of the feed structure 4 below the crushing disk 2, and forms a material air selection channel between the feed port 41 and the crushing structure, so that the material is contacted and mixed with the upward flowing airflow, thereby naturally separating the material into suspended phase particles and settled phase particles: the lighter suspended phase particles are carried upward by the airflow into the crushing structure for crushing, and the heavier settled phase particles are settled and separated under the action of gravity, thereby avoiding the heavy particles directly "smashing" on the hammer head 11 or the gear ring 12 to cause the crushing structure to be damaged too quickly, effectively preventing foreign matter from entering the crushing chamber 1 and wearing the crushing structure, and reducing the change in air volume caused by the wear of the crushing structure. At the same time, compared with the gravity impurity removal device used in the prior art, the method of utilizing the natural sorting of the airflow in the present invention is not easily affected by the feed speed and the moisture content of the material, is easier to control the separation effect, and has higher separation accuracy.

[0023] More specifically, Figure 2-Figure 3As shown, in this embodiment, an upper horizontal partition 7 is provided below the pulverizing disk 2, and a lower horizontal partition 8 is provided below the upper horizontal partition 7. An upper chamber 9 is formed between the upper horizontal partition 7 and the pulverizing disk 2, and a lower chamber 10 is formed between the upper horizontal partition 7 and the lower horizontal partition 8. The feed port 41 of the feed structure 4 is arranged on the cylinder of the side wall of the lower chamber 10, and through holes 71 are distributed on the upper horizontal partition 7. The upper chamber 9 and the lower chamber 10 are connected through the through holes 71, and the air inlet 61 of the air intake structure 6 is arranged on the lower horizontal partition 8. An upper chamber 9 and a lower chamber 10 are formed by arranging an upper horizontal partition 7 and a lower horizontal partition 8 below the crushing disk 2, and a through hole 71 is arranged on the upper horizontal partition 7, so that the feed port 41 of the feed structure 4 is located on the side wall of the lower chamber 10, and the air inlet 61 of the air intake structure 6 is located on the lower horizontal partition 8. This structural design enables the material to fully contact and mix with the upward airflow in the lower chamber 10, and when entering the upper chamber 9 through the through hole 71 on the upper horizontal partition 7, effective separation of suspended phase particles and settled phase particles is achieved, thereby enhancing the air selection effect. At the same time, the air selection space is optimized through the reasonable arrangement of the upper and lower chambers, making the separation process more stable and controllable.

[0024] More specifically, Figure 2-Figure 4 As shown, in this embodiment, the through hole 71 includes a first through hole portion 711 close to the center of the upper horizontal partition 7 and away from the pulverizing structure, and a plurality of the first through hole portions 711 are arranged at intervals around the center of the upper horizontal partition 7; and the through hole 71 also includes a second through hole portion 712 close to the edge of the upper horizontal partition 7, and a plurality of the second through hole portions 712 are arranged at intervals along the edge of the upper horizontal partition 7. By arranging two through holes 71 at different positions on the upper horizontal partition 7 (including the first through hole portion 711 close to the center of the upper horizontal partition 7 and away from the pulverizing structure and the second through hole portion 712 close to the edge of the upper horizontal partition 7, a plurality of the first through hole portions 711 are arranged at intervals around the center of the upper horizontal partition 7, and a plurality of the second through hole portions 712 are arranged at intervals along the edge of the upper horizontal partition 7), this arrangement enables the separation process of airflow and material to be fully realized in different areas of the upper horizontal partition 7, which helps to improve the uniformity of air selection.

[0025] More specifically, Figure 2-Figure 4 As shown, in this embodiment, the lower horizontal partition 8 is arranged on the support base 13, and the rotation drive mechanism 3 is installed on the lower horizontal partition 8. The upper end of the rotation drive mechanism 3 is connected to the crushing disk 2, and the support base 13 is provided with an air intake channel 131 connected to the air inlet 61, and the air flow inlet of the air intake channel 131 is arranged on the side and / or bottom of the support base 13.

[0026] More specifically, Figure 2-Figure 4 As shown, the rotary drive mechanism 3 uses an electric motor, and the output shaft of the electric motor passes through the upper horizontal partition 7 and is connected to the crushing disk 2; the air intake channel 131 constitutes an airflow cooling channel for the electric motor. By installing the electric motor (rotary drive mechanism 3) on the lower horizontal partition 8 and its output shaft passes through the upper horizontal partition 7 to connect to the crushing disk 2, and designing the air intake channel 131 of the support base 13 (its airflow inlet is arranged on the side and / or bottom of the support base 13) to be connected to the air intake port 61 and to serve as an airflow cooling channel for the electric motor, it is achieved that the air intake can provide power for the air selection function of the vertical crusher and complete the cooling of the electric motor before entering the crushing chamber 1, which reflects the reasonable arrangement of the structure and the effective integration of functions. The output shaft of the motor is connected to the crushing disc 2 through the upper horizontal partition 7, which realizes the simplification of the transmission structure and avoids the traditional multi-stage transmission mechanism (such as pulleys, reducers, etc.). It not only reduces the transmission loss and improves the transmission efficiency, but also reduces the number of parts through this direct connection, simplifies the equipment structure, is conducive to improving the reliability and maintenance convenience of the equipment, and also creates good layout conditions for the cooling of the motor.

[0027] The vertical pulverizer of the second embodiment of the present invention is based on the vertical pulverizer of the first embodiment, and a sedimentation phase particle recovery structure is arranged below the material air selection channel. Specifically, Figure 5 FIG. 1 is a bottom schematic diagram of the support base 13 in the vertical crusher according to the second embodiment of the present invention. Figure 5 As shown, the sedimentation phase particle recovery structure includes a sedimentation phase particle recovery groove 14, the groove opening of the sedimentation phase particle recovery groove 14 is opened on the lower horizontal partition 8 and is located below the feed port 41, the material discharge port of the sedimentation phase particle recovery groove 14 is located on the cylinder of the side wall of the vertical crusher, the groove bottom of the sedimentation phase particle recovery groove 14 is inclined from top to bottom along the direction from the groove opening to the material discharge port, and an opening 141 is provided on the side wall of the sedimentation phase particle recovery groove 14 near the groove opening, so that the groove also serves as an air inlet 61.

[0028] The vertical crusher of Example 2 is based on the vertical crusher of Example 1, by adding a sedimentation phase particle recovery structure below the material air selection channel, wherein the notch of the sedimentation phase particle recovery trough 14 is opened on the lower horizontal partition 8 and is located below the feed port 41, the material discharge port is located on the side wall cylinder of the vertical crusher, the trough bottom is inclined from top to bottom along the direction from the material receiving port to the material discharge port, and an opening 141 is provided on the side wall of the sedimentation phase particle recovery trough 14 near the notch so that the notch also serves as an air inlet 61. This improved structure can not only effectively collect the sedimentation phase particles separated from the material air selection channel, but also provide an air flow channel for air selection while realizing material collection through the design of the notch also serving as the air inlet 61, which embodies the multifunctional integration of the structure and further improves the practicality and work efficiency of the vertical crusher.

[0029] Figure 6 It is a cross-sectional view of a vertical crusher according to the third embodiment of the present invention. Figure 7 for Figure 6 The internal structure diagram of the lower chamber 10 of the vertical mill is shown in FIG. Figure 6-Figure 7 As shown, the vertical crusher of embodiment 3 of the present invention is based on the vertical crusher of embodiment 1, with the first air inlet portion 611 reduced or cancelled, and a lower chamber partition plate 15 is arranged around the feed port 41 between the upper horizontal partition plate 7 and the lower horizontal partition plate 8, and the area between the lower chamber partition plate 15 and the feed port 41 in the lower chamber 10 forms a feed chamber independent of other areas in the lower chamber 10, the through hole 71 includes a third through hole portion 713 correspondingly arranged above the feed chamber, and the air inlet 61 includes a first air inlet portion 611 correspondingly arranged below the feed chamber.

[0030] In addition, a sedimentation phase particle recovery structure is arranged below the material air selection channel, and the sedimentation phase particle recovery structure includes a sedimentation phase particle recovery trough 14, the notch of the sedimentation phase particle recovery trough 14 is opened on the lower horizontal partition 8 and is located below the feed port 41, and the material discharge port of the sedimentation phase particle recovery trough 14 is located on the cylinder of the side wall of the vertical crusher, and the bottom of the sedimentation phase particle recovery trough 14 is inclined from top to bottom along the direction from the notch to the material discharge port, and an opening 141 is provided on the side wall of the sedimentation phase particle recovery trough 14 near the notch, so that the notch also serves as the first air inlet portion 611.

[0031] Embodiment 3 is based on Embodiment 1, and the main improvement is that the first air inlet portion 611 is reduced or cancelled, and a lower chamber partition plate 15 is added between the upper horizontal partition plate 7 and the lower horizontal partition plate 8. Through this structure, a feed chamber independent of other areas is formed in the lower chamber 10 (located between the partition plate of the lower chamber 10 and the feed port 41), and accordingly, a third through hole portion 713 is arranged above the feed chamber, and the first air inlet portion 611 is arranged below the feed chamber; at the same time, a sedimentation phase particle recovery structure similar to that of Embodiment 2 is also arranged, including a sedimentation phase particle recovery groove 14, whose groove opening is opened on the lower horizontal partition plate 8 and is located below the feed port 41, the groove bottom is inclined, and the groove opening is used as the first air inlet portion 611 through the opening 141 on the side wall. This design optimizes the air selection process of the material through the setting of an independent feed chamber, and at the same time realizes the effective collection of sedimentation phase particles and the multifunctional integration of the airflow channel. By arranging a partition plate of the lower chamber 10 in the lower chamber 10 to form an independent feed chamber, the airflow of the first air inlet portion 611 is confined to a relatively closed space, thereby increasing the air intake per unit space. At the same time, by arranging a third through hole portion 713 correspondingly above the feed chamber, a more concentrated airflow channel is formed. This structure enables the material entering the feed port 41 to be more fully separated by air separation under the action of a stronger upward airflow, thereby improving the separation effect of the suspended phase particles and the settled phase particles. Moreover, since the airflow is more concentrated, the air separation process is also more stable and controllable.

[0032] The above is a description of the relevant contents of the present invention. A person skilled in the art will be able to implement the present invention based on these descriptions. Based on the above contents of this specification, all other embodiments obtained by a person skilled in the art without making creative work should fall within the scope of the present invention.

Claims

1. A vertical crusher, comprising a crushing chamber, a crushing disc arranged horizontally in the crushing chamber, a rotating drive mechanism connected to the crushing disc, and a feeding structure, a discharging structure and an air intake structure respectively connected to the crushing chamber, a crushing structure is arranged between the edge of the crushing disc and the area on the inner wall of the crushing chamber corresponding to the edge, when working, the crushing disc is driven to rotate in the crushing chamber by the rotating drive mechanism, so that the material transported to the crushing structure by the feeding structure is crushed by the crushing structure, the rotation center line of the crushing disc is arranged vertically when rotating, the air intake structure is used to introduce an upward airflow into the lower part of the crushing chamber, the discharging structure is located at the upper part of the crushing chamber and is used to discharge the crushed material from the airflow introduced into the crushing chamber from the air intake structure into the vertical crusher, characterized in that: The feed port of the feed structure is arranged below the pulverizing disk, and a material air selection channel is formed between the feed port and the pulverizing structure. The material entering the material air selection channel through the feed port contacts and mixes with the airflow entering through the air intake structure, and the materials are divided into suspended phase particles and settled phase particles. The suspended phase particles enter the pulverizing structure from bottom to top under the carry of the airflow to be pulverized, and the settled phase particles settle downward under the action of gravity and are gradually separated from the suspended phase particles.

2. The vertical crusher according to claim 1, characterized in that: An upper horizontal partition is provided below the pulverizing disk, and a lower horizontal partition is provided below the upper horizontal partition. An upper chamber is formed between the upper horizontal partition and the pulverizing disk, and a lower chamber is formed between the upper horizontal partition and the lower horizontal partition. The feed port of the feed structure is arranged on the cylinder of the side wall of the lower chamber, through holes are distributed on the upper horizontal partition, and the upper chamber and the lower chamber are connected through the through holes, and the air inlet of the air intake structure is arranged on the lower horizontal partition.

3. The vertical crusher according to claim 2, characterized in that: The through hole includes a first through hole portion close to the center of the upper horizontal partition and away from the crushing structure, and a plurality of the first through hole portions are circumferentially spaced around the center of the upper horizontal partition; and / or, the through hole includes a second through hole portion close to the edge of the upper horizontal partition, and a plurality of the second through hole portions are spaced along the edge of the upper horizontal partition.

4. The vertical crusher according to claim 2, characterized in that: The lower horizontal partition is arranged on the support base, and the rotating drive mechanism is installed on the lower horizontal partition. The upper end of the rotating drive mechanism is connected to the crushing disk. An air intake channel connected to the air inlet is provided in the support base, and the air flow inlet of the air intake channel is arranged on the side and / or bottom of the support base.

5. The vertical crusher according to claim 4, characterized in that: The rotary drive mechanism adopts an electric motor, the output shaft of which passes through the upper horizontal partition and is connected to the pulverizing disk; the air inlet channel constitutes an air flow cooling channel for the electric motor.

6. The vertical mill according to claim 2, characterized in that: A lower chamber partition plate is provided between the upper horizontal partition plate and the lower horizontal partition plate around the feed port, and a feed chamber independent of other areas in the lower chamber is formed in the area between the lower chamber partition plate and the feed port in the lower chamber, the through hole includes a third through hole portion correspondingly arranged above the feed chamber, and the air inlet includes a first air inlet portion correspondingly arranged below the feed chamber.

7. The vertical mill according to claim 6, characterized in that: A sedimentation phase particle recovery structure is provided below the material air selection channel.

8. The vertical mill according to claim 7, characterized in that: The sedimentation phase particle recovery structure includes a sedimentation phase particle recovery trough, a notch of which is opened on the lower horizontal partition and is located below the feed port, a material discharge port of the sedimentation phase particle recovery trough is located on the cylinder of the side wall of the vertical mill, a trough bottom of the sedimentation phase particle recovery trough is inclined from top to bottom along the direction from the notch to the material discharge port, an opening is provided on the side wall of the sedimentation phase particle recovery trough near the notch, so that the notch also serves as an air inlet.

9. The vertical mill according to claim 8, characterized in that: The notch also serves as the first air inlet portion.

10. The vertical mill according to any one of claims 1 to 6, characterized in that: The pulverizing structure includes a hammer head arranged at the edge of the pulverizing disk and a gear ring arranged in an area corresponding to the edge on the inner wall of the pulverizing chamber, and a radial gap formed between the hammer head and the gear ring is connected to the material air selection channel.

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