Disc type mixing mechanism and mixing system thereof

Abstract

The utility model belongs to the technical field of material mixing equipment, and particularly relates to a disc type material mixing mechanism and a material mixing system thereof, the material mixing mechanism comprises a disc base used for material mixing and at least two bulge groups uniformly arranged on the disc base, the disc base drives the bulge groups to rotate through rotating motion, and the bulge groups are arranged on the disc base. And when the flow line of the non-steady flow vortex motion is in contact with the other convex group, the motion direction of the non-steady flow vortex motion is steered, so that the non-steady flow vortex motion can be subjected to a plurality of non-steady flow vortex motions positioned on different horizontal planes and / or vertical planes. The disc type mixing mechanism disclosed by the utility model is suitable for mixing materials with different chemical and physical properties, is good in mixing uniformity and stability and free from layering phenomenon, and can shorten the mixing time and improve the production efficiency under the action of the bulge groups.

Description

Technical Field

[0001] This application relates to the field of material mixing equipment technology, and in particular to a disc-type mixing mechanism and its mixing system. Background Technology

[0002] Material mixing is a crucial step in the production process across various industries, playing a vital role in improving production efficiency, product quality, and stability. For example, in the pharmaceutical industry, various drugs are mixed to prepare ointments or pills; in the chemical industry, various polymer materials are mixed to produce coatings; and in the food industry, flour, syrup, and jam are mixed to prepare desserts. Furthermore, with societal progress and the rapid development of new energy lithium batteries, to meet the demands of high-performance lithium batteries, it is necessary to mix highly active and less active anode materials to obtain anode materials with moderate surface activity.

[0003] However, existing mixing equipment often produces poor mixture indicators, uneven mixing effect, and low mixing efficiency after mixing high-activity and low-activity anode materials. Furthermore, scanning electron microscopy reveals that the angular edges of the mixed anode material are still obvious, and such mixed anode material cannot effectively improve the overall performance of lithium batteries.

[0004] Currently, in response to the problem of uneven mixing of the above-mentioned mixed materials, technicians in various industries are constantly developing various mixing equipment. For example, patent CN205993607U discloses a pig feed mixing device with adjustable mixing range. The upper and lower parts of the rotating shaft are equipped with a disc, and the upper and lower surfaces of the disc are evenly arranged with a number of mixing protrusions. The mixing protrusions are triangular pyramidal in shape. The device uses the mixing protrusions arranged on the disc to stir and mix the materials. However, it relies on the spiral blades at the bottom of the rotating shaft to improve the mixing uniformity.

[0005] For example, patent application CN107971110A discloses a method for grinding hydrogenated SEBS. The material is fed into a ribbon mixer, evenly distributed within a rotary conveyor, and propelled by a screw into a powder chamber composed of six stationary and moving grinding discs. Due to the high-speed rotation of the moving grinding discs and the suction force of the fan, the material is continuously sheared, impacted, and ground, resulting in smaller particles that move outwards under tension and are finally collected by a collection system through a discharge pipe. The grinding mill equipment consists of a body, frame, crushing device, discharge pipe, transmission device and motor, and is equipped with a main unit, fan, collector, airlock, dust collector, and electrical control cabinet, forming a complete thermoplastic micro-grinding unit. This method mixes SEBS particles and antioxidants in a ribbon mixer, which only ensures uniform distribution of the mixture in the rotary conveyor but cannot guarantee uniform mixing of the SEBS particles and antioxidants.

[0006] For example, patent CN213699648U discloses a multi-directional mixer that can drive the mixing motor to drive the spiral mixing blades to mix in the mixing chamber while simultaneously driving the mixing chamber to reciprocate left and right. This can drive the materials in the mixing chamber to move in multiple directions, which can greatly improve the mixing efficiency. The disc and the cylindrical protrusions on the surface of the disc drive the mixing chamber to reciprocate left and right.

[0007] Therefore, it can be seen that the main mixing mechanism of existing mixing equipment is still the spiral stirring blade. However, this mechanism is not suitable for easily broken materials, and when processing materials with different densities or viscosities, stratification may occur, thus affecting the uniformity of mixing. Utility Model Content

[0008] In view of the shortcomings of the prior art, the present invention provides a disc-type mixing mechanism and its mixing system, which is suitable for mixing materials with different chemical and physical properties and has good mixing uniformity.

[0009] To achieve the above and related objectives, the present invention adopts the following technical solution:

[0010] The first aspect of this utility model provides a disc-type mixing mechanism, including a disc base for mixing materials and at least two protrusions uniformly arranged on the disc base. The disc base drives the protrusions to rotate through rotational motion, so that the materials undergo various unsteady flow vortex motions located in different horizontal and / or vertical planes. When the streamline of the unsteady flow vortex motion comes into contact with another protrusion, the direction of motion of the unsteady flow vortex motion changes direction.

[0011] Based on the above-mentioned technical means, the disc-type mixing mechanism of this application is suitable for mixing materials with different chemical and physical properties, such as mixing two materials with different particle sizes and densities. Through the rotational motion of the disc base, under the blocking and rebounding action of the protrusion group, the different materials are made to undergo multiple non-directional unsteady flow vortex motions in the disc base, thereby changing the horizontal movement direction and speed of the materials in the disc base, as well as changing the vertical throwing amplitude of the materials, so as to make the materials undergo multi-dimensional motion changes to uniformly mix the different materials.

[0012] The unsteady flow vortex motion described in this application refers to the change in the motion state of a material over time, including its direction and speed.

[0013] Furthermore, as the disk base continues to rotate, the material forms multiple vortices in the disk base through its multiple unsteady flow vortex motions, and / or, at least two unsteady flow vortex motions have overlapping paths.

[0014] According to the above-mentioned technical means, as time goes by, the disc base continues to rotate. When the material passes through the protrusion group, multiple unsteady flow vortex motions can form local vortices to mix the material within the vortex influence range. The existence of these vortices can make the material distribution on the disc base more dispersed, avoid local material aggregation, and improve the mixing uniformity.

[0015] Furthermore, under the influence of the protrusion group and the degree of material mixing, as time goes by, when the material is mixed to a near-uniform state, the unsteady flow vortex motion of the material gradually tends to stabilize. The unsteady flow vortex motion paths of materials with similar mixing degrees gradually overlap under the action of the protrusion, thereby reducing the possibility of over-mixing of materials and ensuring the stability of mixing uniformity.

[0016] Furthermore, the protrusion group includes multiple protrusions of different heights and spaced apart.

[0017] According to the above-mentioned technical means, the protrusions of different heights on the disc base will cause the material to collide with the protrusions during the rotation of the disc base. The protrusions of different heights can block and rebound the material on different horizontal planes, causing the unsteady flow vortex motion of the material to change direction, increasing the chance of mutual collision and mixing between materials.

[0018] In addition, for materials with large density differences, the protrusions of different heights can prevent the materials from separating due to density differences.

[0019] Furthermore, the protruding tooth has an inclined angle with the axis of its disk base.

[0020] Based on the above technical means, the protruding teeth of this application are provided with an inclined angle, which can affect the movement path of the unsteady flow vortex motion of the material, thereby affecting the mixing uniformity of the material; and the protruding teeth with different inclined angles may cause changes in the collision and friction frequency between materials, thereby affecting the dispersion and mixing effect of material particles.

[0021] Furthermore, the height of the protruding teeth ranges from 35mm to 45mm.

[0022] Furthermore, the included angle of the protruding teeth ranges from 20° to 40°.

[0023] Furthermore, it also includes a main motor for driving the disk base to rotate.

[0024] The second aspect of this utility model provides a mixing system, including a feeding unit, a mixing unit, a filtering unit and a discharging unit connected sequentially by pipes along the material conveying direction, wherein the mixing unit includes the aforementioned disc-type mixing mechanism.

[0025] Furthermore, the mixing unit also includes a negative pressure mixing chamber and a separator for restricting the position of materials in the negative pressure mixing chamber. The disc-type mixing mechanism is installed at the bottom of the negative pressure mixing chamber, and the separator is installed at the top of the negative pressure mixing chamber.

[0026] Furthermore, the feeding unit includes a hopper and a feeding mechanism. The outlet of the hopper is located at the bottom of the hopper, and the inlet of the feeding mechanism is connected to the outlet pipe of the hopper.

[0027] The beneficial technical effects of this utility model are as follows:

[0028] This utility model of disc-type mixing mechanism is suitable for mixing materials with different chemical and physical properties, and has good mixing uniformity and stability with no stratification. Under the action of the protrusion group, the mixing mechanism can shorten the mixing time and improve production efficiency.

[0029] This invention's mixing system utilizes the aforementioned disc-type mixing mechanism, filtration unit, and other devices to effectively achieve uniform dispersion and efficient mixing of materials, and also modifies the microscopic morphology of the material particle surface. Furthermore, this invention's mixing system can effectively reduce dust pollution, providing assurance for the safety and environmental protection of the production environment. Attached Figure Description

[0030] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0031] Figure 1 This is a top view of a disc-type mixing mechanism shown in one embodiment of this application;

[0032] Figure 2 This is a schematic diagram of a separator structure shown in one embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the mixing system structure shown in one embodiment of this application;

[0034] Figure 4 These are electron microscope images of the morphology of various raw materials in a naturally mixed state according to this application;

[0035] Figure 5 for Figure 4 Electron micrographs of the morphology of various raw materials after being mixed by the mixing system of this application.

[0036] Figure Labels

[0037] 1: Hopper; 2: Feeding mechanism; 3: Negative pressure mixing chamber; 4: Separator; 5: Auxiliary motor; 6: Disc base; 61: Convex tooth; 7: Main motor; 8: Dust removal filter tank; 9: Collection bucket; 10: Fan. Detailed Implementation

[0038] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of this invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of this invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of this invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The present invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of this invention are for illustrative purposes only and should not be construed as limiting the scope of protection of this invention. All equivalent changes or modifications made in accordance with the spirit and essence of this invention should be covered within the scope of protection of this invention.

[0039] like Figure 1 and Figure 3 As shown, this utility model provides a disc-type mixing mechanism, including a disc base 6 for mixing materials and at least two protrusions uniformly arranged on the disc base 6. The disc base 6 drives the protrusions to rotate through rotational motion, so that the materials undergo various unsteady flow vortex motions located in different horizontal and / or vertical planes. When the streamline of the unsteady flow vortex motion contacts another protrusion, the direction of motion of the unsteady flow vortex motion changes direction.

[0040] Furthermore, the disc-type mixing mechanism also includes a main motor 7 for driving the disc base 6 to rotate. The main motor 7 can be mounted to the disc base 6 via a mounting shaft to drive the disc base 6 to rotate during operation, thereby agitating the material. The type of the main motor 7 in this application includes, but is not limited to, a DC motor, an asynchronous motor, and a synchronous motor. The frequency of the main motor 7 is 80Hz to 120Hz, such as 80Hz, 90Hz, 100Hz, 110Hz, and 120Hz, but is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0041] Furthermore, the unsteady vortex motion of this application refers to the change in the motion state of materials, such as their direction and speed, over time. Even further, when the main motor 7 is running, the disc base 6 and its protrusions rotate rapidly, disturbing the materials into a fluid state. As the rotation time increases, the obstruction and rebound effect of the protrusions causes different materials to undergo multiple unsteady vortex motions in the disc base 6, thereby changing the horizontal direction and speed of the materials in the disc base 6, as well as altering the vertical throwing amplitude of the materials. This results in multi-dimensional motion changes in the materials, achieving uniform mixing of different materials.

[0042] Furthermore, as the disc base 6 continues to rotate, the material forms multiple vortices within the disc base 6 through its various unsteady flow vortex motions, and / or, at least two unsteady flow vortex motions have overlapping paths. Over time, as the disc base 6 continues to rotate, the material passing over the protrusions forms localized vortices, which mix the material within their influence range. The presence of these vortices makes the material distribution on the disc base 6 more dispersed, preventing localized material aggregation and improving mixing uniformity. Moreover, under the influence of the protrusions and the degree of material mixing, as the material mixes to a near-uniform state over time, the unsteady flow vortex motions gradually stabilize. Materials with similar mixing degrees have their unsteady flow vortex motion paths gradually overlap under the action of the protrusions, thus reducing the possibility of over-mixing and ensuring the stability of mixing uniformity.

[0043] Furthermore, the protrusion group includes multiple protrusions 61 of different heights arranged at intervals. The number of protrusion groups in this application can be 2, 4, or 6 groups, preferably arranged at intervals on the disc base 6, and more preferably arranged at intervals on the disc base 6 in an axially symmetrical manner. Furthermore, the protrusions 61 in this application can be in the form of rectangular plates, etc., and their thickness is set according to actual needs. To ensure the service life of the mixing mechanism, the protrusions 61 in this application are made of a material with high rigidity and wear resistance, such as stainless steel. The number of protrusions 61 in each protrusion group in this application is set according to actual needs, and can be 3, 4, or 5. The height of the protrusions 61 is 35mm to 45mm, for example, 35mm, 37mm, 40mm, 41mm, 43mm, and 45mm, but is not limited to the listed values; other unlisted values ​​within the above range are also applicable. Specifically, the heights of the multiple protrusions 61 in the protrusion group of this application can be arranged in ascending order, identically, or randomly along the clockwise direction of the disk base 6, preferably in ascending order. The arrangement of the heights of the protrusions 61 in the multiple protrusion groups of this application can be kept consistent, or it can be adjusted according to actual needs, preferably with two axially symmetrical protrusion groups being adjusted synchronously.

[0044] Furthermore, the protruding teeth 61 of varying heights on the disc base 6 of this application cause various materials to collide with these teeth 61 during the rotation of the disc base 6. The protruding teeth 61 of different heights can block and rebound the materials on different horizontal planes, making the movement trajectory of the materials more complex and variable. The materials that originally made regular circular motion on the disc base 6 will constantly change their direction of motion due to the presence of the protruding teeth 61, thereby causing the unsteady flow vortex motion of the materials to change direction, increasing the chance of mutual collision and mixing between various materials. For example, when the material passes through the protruding teeth 61 with a lower height, it may be slightly bounced up and its horizontal speed may change, resulting in a small-scale change; while when it encounters the protruding teeth 61 with a higher height, the material may be thrown up significantly, not only changing its speed in the horizontal direction but also generating more violent motion in the vertical direction. This multi-dimensional motion change helps to improve the uniformity of mixing of various materials.

[0045] Furthermore, when the disc base 6 rotates, the protruding teeth 61 of varying heights create localized vortices around the materials, promoting more thorough stirring and mixing. For example, the unsteady vortex motion of the materials creates small localized vortices around the lower-height protruding teeth 61, mixing materials in a small area; while larger-scale vortices are formed around the higher-height protruding teeth 61, affecting materials in a wider area. The presence of these vortices makes the distribution of various materials on the disc base 6 more dispersed, avoiding localized material aggregation, thereby effectively improving the mixing uniformity of the materials.

[0046] Furthermore, this application utilizes the protrusion group to increase the opportunities for collision and position exchange between various materials, making the mixing process more efficient and achieving a uniform mixing state more quickly. For materials with large particle size differences, the protrusions 61 of varying heights can better adapt to their mixing requirements. Larger particles may be thrown up or bounced away when encountering the protrusions 61, thus having more opportunities to contact smaller particles; while smaller particles may be fully mixed with larger particles in the vortex around the protrusions 61. For materials with large density differences, the protrusion group can prevent stratification due to density differences. When higher-density materials undergo unsteady vortex motion in the disc base 6, they may tend to sink, but the protrusions 61 of varying heights will hinder their movement, preventing them from sinking quickly; while lower-density materials will also be fully mixed with higher-density materials under the action of the protrusions 61, avoiding the situation where lower-density materials float on the top and higher-density materials settle at the bottom, thereby improving the mixing uniformity.

[0047] Furthermore, the protruding tooth 61 has an inclined angle with the axis of its corresponding disk base 6. The inclined angle of the protruding tooth 61 ranges from 20° to 40°, for example, 20°, 22°, 24°, 26°, 28°, 30°, 32°, 34°, 36°, 38°, and 40°, but is not limited to the listed values. Other unlisted values ​​within the above range also apply. Specifically, the inclined directions of the multiple protruding teeth 61 in this application can be the same or different, and the size of the inclined angle of the multiple protruding teeth 61 can be arranged in ascending, descending, random, or the same along the clockwise direction of the disk base 6. The size of the inclined angle of each group of protrusions is set according to the actual mixing requirements, and can be the same or different.

[0048] Furthermore, this application influences the motion path of the unsteady flow vortex motion of the material by setting the protruding teeth 61 with an inclined angle, thereby affecting the mixing uniformity of the material; and the protruding teeth 61 with different inclined angles may cause changes in the collision and friction frequency between materials, thereby affecting the dispersion and mixing effect of material particles. For example, the protruding teeth 61 with a large inclined angle may cause stronger inter-particle collisions, and may also cause the material to flow along a specific path, thereby improving the mixing efficiency.

[0049] like Figure 2 and Figure 3 As shown, this utility model also provides a mixing system, including a feeding unit, a mixing unit, a filtering unit and a discharging unit connected sequentially by pipes along the material conveying direction, wherein the mixing unit includes the above-mentioned disc-type mixing mechanism.

[0050] Furthermore, the feeding unit includes a hopper 1 and a feeding mechanism 2. The outlet of the hopper 1 is located at the bottom of the hopper 1, and the inlet of the feeding mechanism 2 is connected to the outlet pipe of the hopper 1. This application does not limit the volume and shape of the hopper 1, but selects it according to the amount of premixed materials. For example, the hopper 1 can be a conical hopper, etc. Furthermore, to achieve efficient conveying of the premixed materials, the inlet of this application is connected through a cross-shaped tube. The cross-shaped tube has multiple ports, one of which is connected to a suction pipe. One end of the suction pipe is connected to the inlet through the cross-shaped tube, and the other end is connected to the premixed material storage area. The remaining ports of the cross-shaped tube can also be connected to the premixing area of ​​the system, etc., in this way to ensure smooth conveying of the premixed materials and improve the system's flexibility and ease of operation. The feeding mechanism 2 of this application can be a screw feeder, which is used to controllably convey the premixed materials in the hopper 1 to the mixing unit. By controlling the screw feeder, the amount and feeding speed of the premixed materials entering the mixing unit are controlled.

[0051] Furthermore, the mixing unit also includes a negative pressure mixing chamber 3 and a separator 4 for restricting the position of materials within the negative pressure mixing chamber 3. A disc-type mixing mechanism is installed at the bottom of the negative pressure mixing chamber 3, and the separator 4 is installed at the top of the negative pressure mixing chamber 3. The separator 4 is preferably as follows: Figure 2 The cage-like separator shown has an auxiliary motor 5 connected to the top of the separator 4. The type of auxiliary motor 5 includes, but is not limited to, DC motors, asynchronous motors, and synchronous motors. The frequency of the auxiliary motor 5 is 60Hz to 100Hz, such as 60Hz, 70Hz, 80Hz, 90Hz, and 100Hz, but is not limited to the listed values. Other unlisted values ​​within the above range are also applicable. In this application, the auxiliary motor 5 is used to drive the separator 4 to rotate rapidly, generating centrifugal force to confine the material within the negative pressure mixing chamber 3.

[0052] Furthermore, the mixing system of this application also includes a blower 10, which is externally connected to the mixing chamber. When the blower 10 is started, it provides negative pressure into the mixing chamber, thereby forming a negative pressure mixing chamber 3. The function of the blower 10 is to generate negative pressure, causing the material in the negative pressure mixing chamber 3 to be attracted by the negative pressure, thus rotating and flying up within the negative pressure mixing chamber 3, thereby ensuring thorough mixing of the material within the negative pressure mixing chamber 3. During the mixing process, the material rubs against the inner wall of the negative pressure mixing chamber 3 to optimize the morphology of the material. The blower 10 of this application is preferably a Roots blower with a frequency of 60Hz to 120Hz, such as 60Hz, 75Hz, 85Hz, 95Hz, 105Hz, and 120Hz, but is not limited to the listed values; other unlisted values ​​within the above range are also applicable.

[0053] Furthermore, the airflow of the fan 10 in this application remains stable to reduce pressure fluctuations within the negative pressure mixing chamber 3 and decrease the likelihood of turbulence generation. Meanwhile, the cage-like separator 4 generates centrifugal force through high-speed rotation, and its internal flow field, through optimized design, can further suppress turbulence. Specifically, the negative pressure generated by the fan 10 in this application guides the airflow within the negative pressure mixing chamber 3 to the separator 4. The airflow direction and the centrifugal force direction (radial) of the separator 4 form a continuous flow path. The centrifugal force of the separator 4 is concentrated near the inner wall of the negative pressure mixing chamber 3, while the airflow driven by the fan 10 is predominantly axial. Since the two directions are complementary, turbulence will not occur within the negative pressure mixing chamber 3 in this application.

[0054] Furthermore, the mixing time of the materials in the negative pressure mixing chamber 3 is 60s to 120s to ensure the uniformity of the mixing. This application controls the mixing time of the materials to avoid increasing equipment energy consumption due to excessive time. When the materials are sensitive substances, if the mixing time is too long, the materials may deteriorate or decompose. If the mixing time is too short, the number of collisions and position exchanges between the various materials will be insufficient, resulting in low mixing uniformity.

[0055] Furthermore, the filtration unit of this application includes a dust removal filter tank 8 for discharging the separated gas. Specifically, multiple longitudinally spaced elongated cloth bags are fixedly connected inside the dust removal filter tank 8, and the cloth bags have supporting ribs inside to ensure that the cloth bags do not deform when the fan 10 draws negative pressure from the negative pressure mixing chamber 3. The upper part of the dust removal filter tank 8 is a closed space, through which the pipe of the fan 10 draws negative pressure from the negative pressure mixing chamber 3, and the internal accommodating space of the dust removal filter tank 8 is connected to the cloth bags to allow the material entering the cloth bags to fall into the accommodating space. When the material mixing is finished, the frequency of the auxiliary motor 5 is adjusted to reduce the speed of the separator 4. When the centrifugal force of the separator 4 is less than the negative pressure, the mixed material is transported to the dust removal filter tank 8 by the negative pressure rising airflow. The separated gas is discharged through the dust removal filter tank 8, and the material powder in the dust removal filter tank 8 is shaken off into the collection bucket 9 below the dust removal filter tank 8 by the action of the pulse device. The volume and shape of the collection bucket 9 in this application are set according to actual needs, such as a conical or elliptical collection bucket.

[0056] Furthermore, during the material mixing process of this application, clean air is discharged from the mixing system, which can ensure the environmental protection and safety of the entire mixing process, and reduce dust pollution while improving the material mixing efficiency.

[0057] Furthermore, this application provides the following specific embodiments to further illustrate the technical solution of this application in detail.

[0058] Example 1

[0059] In this embodiment, the three materials listed in Table 1 are selected as mixing raw materials, and the mixing system described above is used for mixing.

[0060] Table 1 Performance of Mixed Raw Materials

[0061] object Particle size D50 / μm <![CDATA[Specific surface area / (m 2 / g)]]> Graphitization degree / % Anode material A 9 2.4 92.5 Anode material B 15 1.8 93.4 Anode material C 17 1.7 93.1

[0062] In this embodiment, the graphitized negative electrode materials A, B, and C are sieved through a 200-mesh sieve to obtain premixed negative electrode materials A, B, and C with a mesh size smaller than 200.

[0063] Premixed negative electrode materials A, B and C enter the disc-type mixing mechanism of the negative pressure mixing chamber 3 through the screw feeding mechanism connected to the hopper 1, and the feeding time is 30 seconds; the main motor 7 is turned on and its frequency is 95Hz, the auxiliary motor 5 is turned on and its frequency is 75Hz, and the fan 10 is turned on and its frequency is 80Hz.

[0064] Furthermore, this embodiment has four sets of protrusions, each set of protrusions has three spaced teeth 61, and the teeth 61 of the two sets of axially symmetrical protrusions are arranged in the same way. The parameters of the teeth 61 of the two sets of protrusions are shown in Table 2.

[0065] Table 2. Parameters of the convex tooth

[0066] Protrusion Group 1 Height / mm Inclination angle / ° Protrusion Group 2 Height / mm Inclination angle / ° Convex tooth 61-1 35 20 Convex teeth 61-4 40 20 Convex teeth 61-2 40 30 Convex teeth 61-5 40 30 Convex teeth 61-3 45 40 Convex teeth 61-6 40 40

[0067] In this embodiment, the protrusions 61 of the protrusion group 1 are arranged in ascending order in a clockwise direction along the disk base 6.

[0068] In this embodiment, negative electrode materials A, B and C are mixed in negative pressure mixing chamber 3 for 60 seconds. Then, the speed of separator 4 is controlled to decrease so that the centrifugal force is less than the negative pressure. The mixed material is then transported to dust removal filter tank 8. The separated gas is discharged through dust removal filter tank 8. The mixed powder in dust removal filter tank 8 is shaken off into collection bucket 9 under the action of pulse device.

[0069] In this embodiment, the mixing and unloading time is 20 seconds, and based on the above mixing process, the daily output of the mixture can reach 60.1 tons.

[0070] Example 2

[0071] The difference between this embodiment and embodiment 1 is that: the main motor 7 is turned on and its frequency is 80Hz, the auxiliary motor 5 is turned on and its frequency is 60Hz, the fan 10 is turned on and its frequency is 60Hz; the negative electrode materials A, B and C are mixed in the negative pressure mixing chamber 3 for 80 seconds.

[0072] Based on the above mixing process, the estimated daily output of the mixture can reach 52.7 tons.

[0073] Example 3

[0074] The difference between this embodiment and embodiment 1 is that: the main motor 7 is turned on and its frequency is 105Hz, the auxiliary motor 5 is turned on and its frequency is 95Hz, the fan 10 is turned on and its frequency is 120Hz; the negative electrode materials A, B and C are mixed in the negative pressure mixing chamber 3 for 100 seconds.

[0075] Based on the above mixing process, the estimated daily output of the mixture can reach 46.8 tons.

[0076] Example 4

[0077] The difference between this embodiment and embodiment 1 is that: the main motor 7 is turned on and its frequency is 120Hz, the auxiliary motor 5 is turned on and its frequency is 100Hz, the fan 10 is turned on and its frequency is 100Hz; the negative electrode materials A, B and C are mixed in the negative pressure mixing chamber 3 for 120 seconds.

[0078] Based on the above mixing process, the estimated daily output of the mixture can reach 42.1 tons.

[0079] Comparative Example 1

[0080] The difference between this comparative example and Example 1 lies in the parameters of the protrusions of the protrusion group. The parameters of the protrusions of this comparative example are shown in Table 3.

[0081] Table 3 Comparative Example 1: Tooth Parameter Table

[0082] Protrusion Group 1 Height / mm Inclination angle / ° Protrusion Group 2 Height / mm Inclination angle / ° Convex tooth 61-1 45 20 Convex teeth 61-4 50 20 Convex teeth 61-2 50 30 Convex teeth 61-5 50 30 Convex teeth 61-3 55 40 Convex teeth 61-6 50 40

[0083] Comparative Example 2

[0084] The difference between this comparative example and Example 1 lies in the parameters of the protrusions of the protrusion group. The parameters of the protrusions of this comparative example are shown in Table 4.

[0085] Table 4 Comparative Example 2: Tooth Parameter Table

[0086] Protrusion Group 1 Height / mm Inclination angle / ° Protrusion Group 2 Height / mm Inclination angle / ° Convex tooth 61-1 25 20 Convex teeth 61-4 30 20 Convex teeth 61-2 30 30 Convex teeth 61-5 30 30 Convex teeth 61-3 35 40 Convex teeth 61-6 30 40

[0087] Comparative Example 3

[0088] The difference between this comparative example and Example 1 lies in the parameters of the protrusions of the protrusion group. The parameters of the protrusions of this comparative example are shown in Table 5.

[0089] Table 5 Comparative Example 3: Tooth Parameter Table

[0090] Protrusion Group 1 Height / mm Inclination angle / ° Protrusion Group 2 Height / mm Inclination angle / ° Convex tooth 61-1 35 15 Convex teeth 61-4 40 15 Convex teeth 61-2 40 18 Convex teeth 61-5 40 18 Convex teeth 61-3 45 20 Convex teeth 61-6 40 20

[0091] Comparative Example 4

[0092] The difference between this comparative example and Example 1 lies in the parameters of the protrusions of the protrusion group. The parameters of the protrusions of this comparative example are shown in Table 6.

[0093] Table 6 Comparative Example 4: Tooth Parameter Table

[0094] Protrusion Group 1 Height / mm Inclination angle / ° Protrusion Group 2 Height / mm Inclination angle / ° Convex tooth 61-1 35 40 Convex teeth 61-4 40 40 Convex teeth 61-2 40 50 Convex teeth 61-5 40 50 Convex teeth 61-3 45 60 Convex teeth 61-6 40 60

[0095] Performance testing

[0096] Mixing performance: The particle size, specific surface area, and degree of graphitization of the final mixtures of Examples 1 to 4 and Comparative Examples 1 to 4 were tested, and the test results are shown in Table 7. (It should be noted that the degree of graphitization tested in this application is based on a comparison between a weighted average algorithm and the actual mixture. A higher degree of agreement indicates a better mixing effect.)

[0097] Morphology and Appearance: The morphology of premixed negative electrode materials A, B, and C in their naturally mixed state was observed using scanning electron microscopy. The results are as follows: Figure 4 As shown; the morphology of the mixture of negative electrode materials A, B, and C after mixing by the mixing system of this application was observed using a scanning electron microscope, as shown. Figure 5 As shown.

[0098] Experimental data and analysis

[0099] Table 7. Mixing performance of examples and comparative examples

[0100] Group Particle size D50 / μm <![CDATA[Specific surface area / (m 2 / g)]]> Graphitization degree / % Example 1 14.09 2.16 90.21 Example 2 13.94 2.10 91.14 Example 3 13.26 1.99 91.61 Example 4 13.39 2.01 92.07 Comparative Example 1 15.32 2.21 92.45 Comparative Example 2 15.57 2.26 92.71 Comparative Example 3 14.95 2.30 92.68 Comparative Example 4 15.03 2.27 92.39

[0101] As can be seen from the mixing performance data of Comparative Example 1 and Examples 1 to 4, the mixing performance of the embodiments of this application is better than that of Comparative Example 1. This is because the height of the protrusion in Comparative Example 1 exceeds the limit of this application. When the negative electrode materials A, B and C undergo unsteady vortex motion on the disc base, the excessively high protrusion hinders the smooth flow of the negative electrode materials and increases the resistance during the mixing process, resulting in low mixing uniformity of negative electrode materials A, B and C, and thus poor mixing performance.

[0102] As can be seen from the mixing performance data of Comparative Example 2 and Examples 1 to 4, the mixing performance of the present application examples is better than that of Comparative Example 2. This is because the height of the protrusion in Comparative Example 2 is lower than the range defined in the present application. Its protrusion is too low, which shortens the residence time of negative electrode materials A, B and C in the mixing region. Negative electrode materials A, B and C pass through the mixing region quickly, and the interaction between negative electrode materials A, B and C is weakened, resulting in insufficient mixing and thus poor mixing performance.

[0103] As can be seen from the mixing performance data of Comparative Example 3 and Examples 1 to 4, the mixing performance of the present application examples is better than that of Comparative Example 3. This is because the tilt angle of the protrusion teeth in Comparative Example 3 is smaller than the range defined in this application. The excessively small tilt angle of the protrusion teeth will cause the flow velocity of negative electrode materials A, B and C on the disk base to slow down, and may stagnate in a certain area of ​​the disk base to form a mixing dead angle. In addition, the small tilt angle will cause the unsteady flow vortex motion of negative electrode materials A, B and C to have a single flow mode, which cannot form a complex flow path. As a result, the mixing uniformity of negative electrode materials A, B and C is low and the mixing performance is poor.

[0104] As can be seen from the mixing performance data of Comparative Example 4 and Examples 1 to 4, the mixing performance of the embodiments of this application is better than that of Comparative Example 4. This is because the tilt angle of the protrusions in Comparative Example 4 is larger than the range defined in this application. An excessively large tilt angle leads to uneven distribution of negative electrode materials A, B, and C during mixing, causing the negative electrode materials to concentrate in certain areas and fail to mix sufficiently. Furthermore, the excessively large tilt angle of the protrusions increases the sliding resistance of negative electrode materials A, B, and C on the disk base, resulting in poor flow of negative electrode materials A, B, and C. Therefore, Comparative Example 4 has low mixing uniformity and poor performance.

[0105] like Figure 4 As shown, in the naturally mixed state of premixed negative electrode materials A, B, and C, the edges of the negative electrode materials exhibit a distinct rhomboid surface structure. However, when these negative electrode materials are used in lithium batteries, this rhomboid surface characteristic may become the starting point for lithium dendrites, increasing their contact area with the electrolyte, exacerbating side reactions, and affecting the safety of the lithium battery.

[0106] like Figure 5 As shown, the surfaces of the negative electrode materials A, B and C are more rounded after being mixed by the mixing system of this application. This indicates that the mixing system of this application not only has a good mixing effect, but also modifies the microstructure of the particle surface. When the mixed material is used as a negative electrode material in lithium batteries, it has a lower risk of internal short circuit and is safer.

[0107] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A disc-type mixing mechanism, comprising a disc base (6) for mixing materials, characterized in that, It also includes at least two protrusion groups uniformly arranged on the disc base (6). The disc base (6) drives the protrusion groups to rotate through rotational motion, so that the material can perform various unsteady flow vortex motions located in different horizontal and / or vertical planes. When the streamline of the unsteady flow vortex motion contacts another protrusion group, the direction of motion of the unsteady flow vortex motion changes. The protrusion group includes multiple protrusions of different heights and spaced apart (61). The tooth (61) has an inclined angle with the axis of the disk base (6) it is located on.

2. The disc-type mixing mechanism according to claim 1, characterized in that, As the disk base (6) continues to rotate, the material forms multiple vortices in the disk base (6) through its multiple unsteady flow vortex motions, and / or, at least two unsteady flow vortex motions have overlapping paths.

3. The disc-type mixing mechanism according to claim 1 or 2, characterized in that, The height range of the convex tooth (61) is 35mm to 45mm.

4. The disc-type mixing mechanism according to claim 1 or 2, characterized in that, The inclination angle of the protruding tooth (61) ranges from 20° to 40°.

5. The disc-type mixing mechanism according to claim 1 or 2, characterized in that, It also includes a main motor (7) for driving the disk base (6) to rotate.

6. A mixing system, characterized in that, It includes a feeding unit, a mixing unit, a filtering unit and a discharging unit connected sequentially by pipes along the material conveying direction, wherein the mixing unit includes the disc-type mixing mechanism as described in any one of claims 1 to 5.

7. The mixing system according to claim 6, characterized in that, The mixing unit also includes a negative pressure mixing chamber (3) and a separator (4) for limiting the position of materials in the negative pressure mixing chamber (3). The disc mixing mechanism is installed at the bottom of the negative pressure mixing chamber (3), and the separator (4) is installed at the top of the negative pressure mixing chamber (3).

8. The mixing system according to claim 6 or 7, characterized in that, The feeding unit includes a hopper (1) and a feeding mechanism (2), with the inlet of the feeding mechanism (2) connected to the outlet of the hopper (1).

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