Gas phase power mill capable of preventing agglomeration in ultrafine powder preparation process

Abstract

The invention discloses a gas-phase power mill capable of preventing agglomeration in a superfine powder preparation process. A feeding pipe is used for inputting a powder material to a collision area and then crushing the powder material; the materials in the collision area are attracted to the charge area, and after passing through the charge area, the large-particle materials with the size larger than the preset size are settled to the collision area again through the settlement area under the action of centrifugal force; the wall part of the charge chamber is provided with a plurality of layers of anti-agglomeration charge nozzles, and the anti-agglomeration charge nozzles extend from the outside of the power mill body to the inside of the charge chamber; a charge chamber ion generator is arranged outside the power mill body and is used for generating first electrical ions, the charge chamber ion generator is connected with the anti-agglomeration charge nozzle, and the first electrical ions are conveyed into the charge chamber through the anti-agglomeration charge nozzle, so that a first electrical ion environment is formed in the charge region to prevent material agglomeration. According to the scheme, static electricity can be eliminated for the superfine powder, agglomeration is avoided, the granularity of the product is guaranteed, and the probability of generating agglomerates is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ultrafine powder preparation equipment, and in particular to a gas phase power mill for preventing agglomeration in an ultrafine powder preparation process. Background Art

[0002] Gas phase dynamic mill is widely used in the process of preparing ultrafine powders. It uses kinetic gas to form a supersonic airflow through the nozzle and inject it into the grinding chamber to fluidize the material. The accelerated material produces distance collision, friction, and shearing to achieve ultrafine grinding of particles. The material crushed to the required particle size is separated by the classifier, and the material with larger particle size continues to be crushed to the required particle size. However, since the particle size range of ultrafine powder is between 1 and 10μm, the finer the ultrafine powder particles, the larger the specific surface area, and the adsorption and interaction force between particles also increase accordingly, which is very easy to agglomerate and "grow up" to form secondary particles (agglomerates) with larger particle size, which greatly affects the particle size index of ultrafine powder prepared by gas phase dynamic mill and the subsequent separation and transportation processes.

[0003] Therefore, there is an urgent need for a gas phase power mill that can avoid agglomeration of ultrafine powders. Summary of the invention

[0004] The technical problem to be solved by the present application is the problem of agglomeration that is easy to occur in the existing ultrafine powder preparation process. To this end, the present application proposes a gas phase dynamic mill that prevents agglomeration in the ultrafine powder preparation process.

[0005] In response to the above technical problems, this application provides the following technical solutions:

[0006] The present application provides a gas phase power mill for preventing agglomeration in a superfine powder preparation process, comprising:

[0007] The power mill body has a grading impeller, a charging chamber, a feed pipe and a supersonic airflow nozzle arranged inside the body from top to bottom; the area between the charging chamber and the inner wall of the power mill body is a settling area, the lower part of the charging chamber is a collision area, and the interior of the charging chamber is a charging area;

[0008] The feed pipe is used to input powder materials into the collision zone, and the powder materials are crushed after colliding with the supersonic airflow input by the supersonic airflow nozzle;

[0009] The classifying impeller is used to provide centrifugal force; the material in the collision zone is attracted to the charging zone, and after passing through the charging zone, the large particle material with a size larger than the preset size is again settled to the collision zone through the settling zone under the action of the centrifugal force, and the ultrafine powder material with a size smaller than or equal to the preset size is output to the outside of the power mill body;

[0010] The wall of the charging chamber is provided with a multi-layer anti-agglomeration charge nozzle, and the anti-agglomeration charge nozzle extends from the outside of the power mill body to the inside of the charging chamber;

[0011] A charging chamber ion generator is arranged outside the power mill body for generating ions of a first charge property. The charging chamber ion generator is connected to the anti-agglomeration charge nozzle to transport the first charge property ions to the inside of the charging chamber through the anti-agglomeration charge nozzle.

[0012] In some embodiments, the gas phase power mill for preventing agglomeration of ultrafine powders during preparation is provided with a plurality of charge elimination nozzles at the upper portion of the settling zone, and the charge elimination nozzles extend from the outside of the power mill body to the settling zone;

[0013] A sedimentation zone ion generator is arranged outside the power mill body for generating ions of a second charge. The sedimentation zone ion generator is connected to the charge elimination nozzle to transport the ions of the second charge to the sedimentation zone through the charge elimination nozzle to eliminate the charge carried by the material in the sedimentation zone. The second charge ions have an opposite charge to the first charge ions.

[0014] A gas phase power mill for preventing agglomeration in the ultrafine powder preparation process described in some schemes, wherein the outlet of the gas phase power mill is provided with an outlet pipe, and the outlet pipe is provided with a nozzle for eliminating static charge;

[0015] An outlet pipe ion generator is arranged outside the power mill body for generating ions of the first charge property; the outlet pipe ion generator is connected to the static charge elimination nozzle to transport the ions of the first charge property to the outlet pipe for providing the first charge property ions for the output ultrafine powder material again.

[0016] Some schemes describe a gas phase power mill that prevents agglomeration of ultrafine powders during preparation, wherein the wall of the charging chamber is a metal cylinder, and the charging chamber is coaxially arranged with the gas phase power mill; the charging chamber is fixed to the cylinder of the gas phase power mill by a fixed arm, and an insulating layer is provided on the outside of the wall of the charging chamber and the inner wall of the gas phase power mill.

[0017] In some schemes, the gas phase power mill for preventing agglomeration of the ultrafine powder preparation process is described, wherein the upper and lower ends of the charging chamber are both trumpet-shaped expansion structures, the diameter of the lower port of the charging chamber is in the range of 80%-90% of the inner diameter of the gas phase power mill, and the diameter of the upper port is smaller than the diameter of the grading impeller; the distance between the upper end surface of the charging chamber and the grading impeller is half the radius length of the grading impeller; the distance between the lower end surface of the charging chamber and the supersonic airflow nozzle is the inner wall diameter of the gas phase power mill.

[0018] In some embodiments, the gas phase dynamic mill for preventing agglomeration of ultrafine powders during preparation is provided, wherein the anti-agglomeration charge wind nozzles are arranged in three layers, and the number of the anti-agglomeration charge wind nozzles evenly arranged along the circumference in each layer is not less than 6;

[0019] The anti-agglomeration charge wind nozzle at the bottom layer has a first angle between the vertical angle projection of the nozzle and the circumferential plane, and the nozzle is arranged upward, and a second angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction, and both the first angle and the second angle are less than 30°;

[0020] The anti-agglomeration charge wind nozzle at the top layer has an angle between the vertical angle projection of the nozzle and the circumferential plane that is the first angle, and the nozzle is arranged downward, and an angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction that is the second angle;

[0021] The anti-agglomeration charge wind nozzle of the middle layer has an angle between the vertical surface angle projection of the nozzle and the circumferential plane of zero, the nozzle direction is horizontally arranged, and the angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction is the second angle.

[0022] In some embodiments, the gas phase power mill for preventing agglomeration of ultrafine powders during preparation is characterized in that the charge elimination wind nozzles are evenly arranged along the interior of the gas phase power mill at the upper part of the settling zone and the charge elimination wind nozzles are arranged in a single layer or multiple layers;

[0023] The angle between the nozzle vertical surface angle projection of each layer of the charge elimination wind nozzle and the circular plane is the first angle, and the nozzle is arranged downward; the angle between the nozzle circular surface angle projection and the circumferential radial direction is the third angle, and the third angle is greater than the second angle.

[0024] In some schemes, the gas phase dynamic mill for preventing agglomeration in the ultrafine powder preparation process described in the invention has a nozzle for eliminating static charge, and the angle between the nozzle and the horizontal direction is a fourth angle, and the fourth angle is between the second angle and the third angle.

[0025] The gas phase dynamic mill for preventing agglomeration of the ultrafine powder preparation process described in some embodiments also includes a charge measurement device, wherein:

[0026] The charge measuring device comprises an outlet pipe charge measuring device arranged in the outlet pipe, and is used to measure the charge amount in the ultrafine powder material outputted by the gas phase power mill.

[0027] In some embodiments of the ultrafine powder preparation process described in the invention, the gas phase power mill for preventing agglomeration, the charge measurement device further comprises:

[0028] A sedimentation zone charge measuring device disposed at the lower part of the sedimentation zone is used to measure the charge of the material entering the collision zone through the sedimentation zone;

[0029] The charging chamber outlet charge measuring device arranged at the charging chamber outlet is used to measure the charge amount of the material output by the charging chamber.

[0030] The technical solution of this application has the following technical effects compared with the prior art:

[0031] The gas phase power mill for preventing agglomeration in the ultrafine powder preparation process provided by the present application provides a charging chamber in the gas phase power mill, and introduces first charge ions in the charging chamber through an anti-agglomeration charge wind nozzle, so as to provide first charge ions to the material passing through the charging chamber to prevent the material from agglomerating. Thus, the ultrafine powder material that has been crushed in the collision zone can eliminate static electricity and avoid agglomeration through the action of the first charge ions in the charging zone of the charging chamber, thereby ensuring the particle size of the product and reducing the probability of agglomerates. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present application, wherein:

[0033] Figure 1 A schematic diagram of the structure of a gas phase power mill for preventing agglomeration in the ultrafine powder preparation process according to an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of a gas phase power mill for preventing agglomeration in the ultrafine powder preparation process according to another embodiment of the present application;

[0035] Figure 3 A schematic diagram of the connection relationship between a gas phase power mill and an ion generator for preventing agglomeration in the ultrafine powder preparation process described in one embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection 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 this application can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0040] The present application embodiment provides a gas phase dynamic mill for preventing agglomeration in the process of preparing ultrafine powders, such as Figure 1 As shown, it includes a power mill body 100, in which a grading impeller 1, a charging chamber 2, a feed pipe 3 and a supersonic airflow nozzle 4 are arranged from top to bottom; the lower part of the charging chamber is a collision zone 101, the interior of the charging chamber 2 is a charging zone 102, and the area between the charging chamber 2 and the inner wall of the power mill body 100 is a sedimentation zone 103. The feed pipe 3 is used to input powder materials into the collision zone 101, and the powder materials are crushed after colliding with the supersonic airflow input by the supersonic airflow nozzle 4; the grading impeller 1 is used to provide centrifugal force; the materials in the collision zone 101 are attracted to the charging zone 102, and after passing through the charging zone 102, large particle materials with a size larger than a preset size are again settled to the collision zone 101 through the sedimentation zone 103 under the action of the centrifugal force, and the ultrafine powder materials with a size less than or equal to the preset size are output to the outside of the power mill body 100; the final waste will be discharged through the waste discharge port 104. As shown in the figure, the wall of the charging chamber 2 is provided with a multi-layer anti-agglomeration charge nozzle 21, and the anti-agglomeration charge nozzle 21 extends from the outside of the power mill body 100 to the inside of the charging chamber 2. Figure 3 As shown, a charging chamber ion generator 202 is disposed outside the power mill body 100 for generating first-charge ions. The charging chamber ion generator 202 is connected to the anti-agglomeration charge nozzle 21 to transport the first-charge ions to the inside of the charging chamber 2 through the anti-agglomeration charge nozzle 21 so that the charging area 102 forms a first-charge ion environment to prevent material agglomeration.

[0041] In specific implementation, the first charged particles generated by the charging chamber ion generator 202 can be sent into the charging chamber 2 through the wind force of the charging chamber ion wind chamber 205, that is, the generated first charged ions are blown to the charging chamber 2 in the form of ion wind through the anti-agglomeration charge wind nozzle 21, and the ion wind pressure is greater than the indoor pressure of the charging chamber 2.

[0042] In the above embodiments, the gas phase power mill for preventing agglomeration in the ultrafine powder preparation process is provided with a charging chamber 2 in the gas phase power mill, and the first charge ions are introduced into the charging chamber 2 through the anti-agglomeration charge wind nozzle 21, so that the first charge ions can be provided to the material passing through the charging chamber 2 to prevent the material from agglomerating. Thus, the ultrafine powder material crushed in the collision zone 101 can eliminate static electricity and avoid agglomeration through the action of the first charge ions in the charging zone 102 of the charging chamber 2, thereby ensuring the particle size of the product and reducing the probability of agglomerates.

[0043] Preferably, in the gas phase power mill that prevents agglomeration during the ultrafine powder preparation process, the wall of the charging chamber 2 is a metal cylinder, and the charging chamber 2 is coaxially arranged with the gas phase power mill; the charging chamber 2 is fixed to the cylinder of the gas phase power mill through a fixed arm 22, that is, connected to the power mill body 100, and the outside of the wall of the charging chamber 2 and the inner wall of the gas phase power mill are both provided with an insulating layer. As shown in the figure, in the gas phase power mill for preventing agglomeration in the ultrafine powder preparation process described in some schemes, the upper and lower ends of the charging chamber 2 are both trumpet-type expansion structures, the diameter of the lower port of the charging chamber 2 is in the range of 80%-90% of the inner diameter of the gas phase power mill, preferably the diameter of the lower port is 85% of the inner diameter of the gas phase power mill, and the diameter of the upper port is smaller than the diameter of the grading impeller 1; the distance between the upper end face of the charging chamber 2 and the grading impeller 1 is half the length of the radius of the grading impeller; the distance between the lower end face of the charging chamber 2 and the supersonic airflow nozzle 4 is the inner wall diameter of the gas phase power mill, that is, the inner diameter of the power mill body 100.

[0044] In the above scheme, the function of the anti-agglomeration charge wind nozzle 21 is to provide the first charge ions to the charge area 102, and it is set as a multi-layer structure. Preferably, as shown in the figure, the anti-agglomeration charge wind nozzle 21 is arranged in three layers, and the number of uniformly arranged along the circumference in each layer is not less than 6. The anti-agglomeration charge wind nozzle 21 of the bottom layer, the nozzle vertical angle projection and the circumferential plane angle are the first angle, and the nozzle is arranged upward, and the nozzle circumferential surface angle projection and the circumferential radial angle are the second angle. The first angle and the second angle are both less than 30°; the anti-agglomeration charge wind nozzle 21 of the top layer, the nozzle vertical angle projection and the circumferential plane angle are the first angle, and the nozzle is arranged downward, and the nozzle circumferential surface angle projection and the circumferential radial angle are the second angle; the anti-agglomeration charge wind nozzle 21 of the middle layer, the nozzle vertical angle projection and the circumferential plane angle are zero, the nozzle direction is arranged horizontally, and the nozzle circumferential surface angle projection and the circumferential radial angle are the second angle. As a feasible solution, the first angle is 15°, and can also float up and down by 3°, and the second angle can be 18°, and can float up and down by 3°. In the above solution of this embodiment, due to the arrangement of the anti-agglomeration charge wind nozzle 21, the ion wind can form a vortex in the charging chamber 2, which can enable the ultrafine powder to fully carry the first charge particles, and due to the repulsive force of the same charge, the ultrafine powder can achieve the effect of anti-agglomeration.

[0045] like Figure 2 As shown, in some preferred embodiments, the gas phase power mill for preventing agglomeration of the ultrafine powder preparation process, the upper part of the sedimentation zone 103 is provided with a plurality of charge elimination wind nozzles 1031, and the charge elimination nozzles 1031 extend from the outside of the power mill body 100 to the sedimentation zone 103; Figure 3As shown, a sedimentation zone ion generator 201 is disposed outside the power mill body 100 for generating ions of a second charge property, and the sedimentation zone ion generator 201 is connected to the charge elimination nozzle 1031, and the ions of the second charge property are transported to the sedimentation zone 103 through the charge elimination nozzle 1031 to eliminate the charge carried by the material in the sedimentation zone 103. Specifically, the first charge property ions and the second charge property ions have opposite charges, the first charge property ions are anions, and the second charge property ions are cations. In some schemes, the gas phase power mill for preventing agglomeration in the ultrafine powder preparation process described in the embodiment is characterized in that the charge elimination wind nozzle 1031 is evenly arranged at the upper part of the sedimentation zone 103 along the interior of the gas phase power mill, and the charge elimination wind nozzle 1031 can be set as one layer or multiple layers; the angle between the nozzle elevation angle projection and the circumferential plane of each layer of the charge elimination wind nozzle 1031 is the first angle, and the nozzle is arranged downward; the angle between the nozzle circumferential surface angle projection and the circumferential radial angle is the third angle, the third angle is greater than the second angle, the third angle can be 30°, and it can float up and down 5°. In the above scheme, the charge elimination wind nozzle 1031 is arranged along the circumference of the sedimentation zone 103, and the ion wind with opposite electrical properties to the charge chamber 2 enters the sedimentation zone 103 through the nozzle. The charge elimination wind nozzle 1031 is arranged in layers at the upper end of the sedimentation zone 103, and one layer can meet the demand, and 6 are evenly arranged along the circumference of the power mill body 100. The vertical angle projection of the nozzle is arranged downward at an angle of 15° to the circumferential plane, and the circumferential angle projection of the nozzle is arranged downward at an angle of 30° to the circumferential radial direction. After the ultrafine powder passes through the classification impeller 1, the ultrafine powder of qualified size is output; the large particles of unqualified size are separated and enter the sedimentation area 103 due to the centrifugal force of the classification impeller 1. The ions generated by the sedimentation area ion generator 201 generate second-charge ions after passing through the sedimentation area ion wind chamber 204, and the air is pressurized by the fan and sent to the sedimentation area ion wind chamber 204, and the generated second-charge ions are blown to the sedimentation area 103 through the charge elimination wind nozzle 1031 in the form of ion wind, and the ion wind pressure is greater than the pressure in the sedimentation area 103. Due to the arrangement of the charge elimination wind nozzle 1031, the ion wind forms a vortex in the sedimentation area 103, which can make the large particles fully contact with the second-charge ion wind, neutralize the first-charge ions carried by the large particle flow in the charged area, and then settle to the collision area.

[0046] Furthermore, in the gas phase power mill for preventing agglomeration of the ultrafine powder preparation process, the outlet of the gas phase power mill is provided with an outlet pipe 30, and the outlet pipe 30 is provided with a nozzle 31 for eliminating static charge; Figure 3As shown, an outlet pipe ion generator 203 is provided on the outside of the power mill body 100 for generating ions of the first charge; the outlet pipe ion generator 203 is connected to the static charge elimination nozzle 31 to transport the first charge ions to the outlet pipe 30, so as to provide the first charge ions for the output ultrafine powder material again. In some schemes, the gas phase power mill for preventing agglomeration in the ultrafine powder preparation process described in the static charge elimination wind nozzle 31 has a fourth angle between the nozzle and the horizontal direction, and the fourth angle is between the second angle and the third angle. Preferably, the fourth angle is 20°, and can have a floating range of 3°. In combination Figure 3 As shown, the ions generated by the outlet pipe ion generator 203 generate first charge ions after passing through the outlet pipe ion wind chamber 206, and the air is sent to the outlet pipe ion wind chamber 206 after being pressurized by the fan, and the generated first charge ions are blown to the outlet pipe 30 through the static charge elimination wind nozzle 31 in the form of ion wind, and the ion wind pressure is greater than the pressure in the outlet pipe 30. Due to the arrangement of the static charge elimination wind nozzle 31, the ion wind forms a vortex in the outlet pipe 30, which can make the ultrafine material flow fully contact with the first charge ion wind, so as to ensure that the ultrafine powder is fully charged for the second time, eliminate the influence of secondary static electricity, and further enhance the anti-agglomeration property of the ultrafine powder.

[0047] The gas phase power mill for preventing agglomeration in the ultrafine powder preparation process described in some schemes also includes a charge measuring device. Among them, the charge measuring device includes an outlet pipe charge measuring device A3 arranged in the outlet pipe 30, which is used to measure the charge amount in the ultrafine powder material output by the gas phase power mill. The charge measuring device also includes a sedimentation zone charge measuring device A2 arranged at the lower part of the sedimentation zone 103, which is used to measure the charge amount of the material entering the collision zone 101 through the sedimentation zone 103; and a charging chamber outlet charge measuring device A1 arranged at the outlet of the charging chamber, which is used to measure the charge amount of the material output by the charging chamber 2. The material charge amount measured by the above charge measuring devices can be provided to the staff for the staff to judge whether the material charge amount at each position meets the requirements, and adjust the power of the corresponding ion generator according to the material charge amount at each position. For example, the charge measurement device A2 in the sedimentation zone measures online whether the charge in the large particle flow is close to zero. If it is not close to zero, the power of the ion generator in the sedimentation zone is determined according to whether the charge is positive or negative. If the charge is negative, it means that there are too few positive ions, so the power of the ion generator in the sedimentation zone is increased to ensure that the large particle flow is fully charged, while avoiding the ion generator from being under excessive load to achieve energy saving effect.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A gas phase power mill for preventing agglomeration in the process of preparing ultrafine powders, characterized in that: include: The power mill body has a grading impeller, a charging chamber, a feed pipe and a supersonic airflow nozzle arranged inside the body from top to bottom; the area between the charging chamber and the inner wall of the power mill body is a settling area, the lower part of the charging chamber is a collision area, and the interior of the charging chamber is a charging area; The feed pipe is used to input powder materials into the collision zone, and the powder materials are crushed after colliding with the supersonic airflow input by the supersonic airflow nozzle; The classifying impeller is used to provide centrifugal force; the material in the collision zone is attracted to the charging zone, and after passing through the charging zone, the large particle material with a size larger than the preset size is again settled to the collision zone through the settling zone under the action of the centrifugal force, and the ultrafine powder material with a size smaller than or equal to the preset size is output to the outside of the power mill body; The wall of the charging chamber is provided with a multi-layer anti-agglomeration charge nozzle, and the anti-agglomeration charge nozzle extends from the outside of the power mill body to the inside of the charging chamber; A charging chamber ion generator is arranged outside the power mill body for generating ions of a first charge property. The charging chamber ion generator is connected to the anti-agglomeration charge nozzle to transport the first charge property ions to the inside of the charging chamber through the anti-agglomeration charge nozzle.

2. The gas phase dynamic mill for preventing agglomeration in the ultrafine powder preparation process according to claim 1, characterized in that: A plurality of charge elimination nozzles are provided at the upper portion of the settling zone, and the charge elimination nozzles extend from the outside of the power mill body to the settling zone; A sedimentation zone ion generator is arranged outside the power mill body for generating ions of a second charge. The sedimentation zone ion generator is connected to the charge elimination nozzle to transport the ions of the second charge to the sedimentation zone through the charge elimination nozzle to eliminate the charge carried by the material in the sedimentation zone. The second charge ions have an opposite charge to the first charge ions.

3. The gas phase dynamic mill for preventing agglomeration in the ultrafine powder preparation process according to claim 2, characterized in that: The outlet of the gas phase power mill is provided with an outlet pipe, and the outlet pipe is provided with a nozzle for eliminating static electricity; An outlet pipe ion generator is arranged outside the power mill body for generating ions of the first charge property; the outlet pipe ion generator is connected to the static charge elimination nozzle to transport the ions of the first charge property to the outlet pipe for providing the first charge property ions for the output ultrafine powder material again.

4. The gas phase power mill for preventing agglomeration in the process of preparing ultrafine powders according to claim 1, characterized in that: The wall of the charging chamber is a metal cylinder, and the charging chamber is coaxially arranged with the gas phase power mill; the charging chamber is fixed to the cylinder of the gas phase power mill through a fixed arm, and the outer wall of the charging chamber and the inner wall of the gas phase power mill are both provided with an insulating layer.

5. The gas phase power mill for preventing agglomeration in the process of preparing ultrafine powders according to claim 4, characterized in that: The upper and lower ends of the charging chamber are both trumpet-type expansion structures, the diameter of the lower port of the charging chamber is within the range of 80%-90% of the inner diameter of the gas phase power mill, and the diameter of the upper port is smaller than the diameter of the classifying impeller; the distance between the upper end surface of the charging chamber and the classifying impeller is half the radius length of the classifying impeller; the distance between the lower end surface of the charging chamber and the supersonic airflow nozzle is the inner wall diameter of the gas phase power mill.

6. The gas phase power mill for preventing agglomeration of ultrafine powders in the preparation process according to any one of claims 1 to 5, characterized in that: The anti-agglomeration charge wind nozzles are arranged in three layers, and the number of nozzles uniformly arranged along the circumference in each layer is not less than 6; The anti-agglomeration charge wind nozzle at the bottom layer has a first angle between the vertical angle projection of the nozzle and the circumferential plane, and the nozzle is arranged upward, and a second angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction, and both the first angle and the second angle are less than 30°; The anti-agglomeration charge wind nozzle at the top layer has an angle between the vertical angle projection of the nozzle and the circumferential plane that is the first angle, and the nozzle is arranged downward, and an angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction that is the second angle; The anti-agglomeration charge wind nozzle of the middle layer has an angle between the vertical surface angle projection of the nozzle and the circumferential plane of zero, the nozzle direction is horizontally arranged, and the angle between the circumferential surface angle projection of the nozzle and the circumferential radial direction is the second angle.

7. The gas phase power mill for preventing agglomeration of ultrafine powders in the preparation process according to any one of claims 2 to 5, characterized in that: The de-charge wind nozzles are evenly arranged at the upper part of the settling zone along the interior of the gas phase power mill and the de-charge wind nozzles are arranged in a single layer or multiple layers; The angle between the nozzle vertical surface angle projection of each layer of the charge elimination wind nozzle and the circular plane is the first angle, and the nozzle is arranged downward; the angle between the nozzle circular surface angle projection and the circumferential radial direction is the third angle, and the third angle is greater than the second angle.

8. The gas phase power mill for preventing agglomeration of ultrafine powders in the preparation process according to any one of claims 3 to 5, characterized in that: The static charge eliminating wind nozzle has a fourth angle between the nozzle and the horizontal direction, and the fourth angle is between the second angle and the third angle.

9. The gas phase power mill for preventing agglomeration in the process of preparing ultrafine powders according to any one of claims 3 to 5, characterized in that: Also included is a charge measurement device, wherein: The charge measuring device comprises an outlet pipe charge measuring device arranged in the outlet pipe, and is used to measure the charge amount in the ultrafine powder material outputted by the gas phase power mill.

10. The gas phase power mill for preventing agglomeration in the process of preparing ultrafine powders according to claim 9, characterized in that: The charge measurement device further comprises: A sedimentation zone charge measuring device disposed at the lower part of the sedimentation zone is used to measure the charge of the material entering the collision zone through the sedimentation zone; The charging chamber outlet charge measuring device arranged at the charging chamber outlet is used to measure the charge amount of the material output by the charging chamber.

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