A pneumatic breaking and screening device for producing high-purity lithium oxide

Abstract

The utility model provides a kind of production high-purity lithium oxide pneumatic crushing screening device, belong to crushing screening technical field, solve the problem of low production efficiency, poor crushing effect and prone to jam in prior art. It includes cylinder, cylinder is equipped with motor, motor is connected with rotating disc, rotating disc is provided with several crushing blades, the outer wall of cylinder is provided with air inlet pipe, cylinder is provided with feed pipe, the top of cylinder is connected with connecting disc, connecting disc is provided with discharge pipe, discharge pipe is connected with columnar filter screen. Several air inlet pipes tangent to cylinder, form high-speed rotating airflow in cylinder, lithium hydroxide enters into cylinder and is sorted by airflow, lighter lithium hydroxide reaches columnar filter screen upward with airflow and is discharged after screening, heavier lithium hydroxide falls to rotating disc, is crushed by high-speed rotating crushing blade, to realize efficient crushing and screening, avoid lithium hydroxide accumulation in cylinder to cause jam, ensure the reliability and stability of device.

Description

Technical Field

[0001] This utility model belongs to the field of crushing and screening technology, specifically to a pneumatic crushing and screening device for producing high-purity lithium oxide. Background Technology

[0002] Pneumatic crushing and screening devices are equipment that combine pneumatic crushing and screening functions. Driven by air pressure, they achieve material crushing and grading, offering advantages such as high efficiency, safety, and environmental friendliness. They are widely used in industries such as mining, building materials, power, and chemicals. In the continuous production process of high-purity lithium oxide using DBD (dielectric barrier discharge) plasma technology, pneumatic crushing and screening devices are used to crush lithium hydroxide raw materials (lithium hydroxide is hygroscopic, making it difficult to ensure dryness during storage and handling, and it easily absorbs moisture and clumps), ensuring that the particle size of the lithium hydroxide meets production requirements.

[0003] Existing pneumatic crushing devices have several drawbacks: ① Some pneumatic crushing devices have only one tangential air inlet, which cannot fully utilize the energy of the airflow to form a strong cyclone. Furthermore, most crushing mechanisms are impact hammers / balls, which greatly affect the aerodynamic distribution of the cyclone, resulting in uneven airflow distribution. This leads to insufficient contact between lithium hydroxide and the crushing components, resulting in incomplete crushing of lithium hydroxide and requiring multiple cycles of crushing, which greatly reduces production efficiency. ② In some pneumatic crushing devices, the feed direction is perpendicular to the cyclone field, causing lithium hydroxide to easily impact and stick to the bottom of the device, affecting the crushing effect. ③ Some pneumatic crushing devices have an inadequate structural design, resulting in poor flow of lithium hydroxide within the device, which easily leads to blockages, affecting the normal operation of the device. This requires frequent shutdowns for cleaning and maintenance, reducing the reliability and stability of the device. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a pneumatic crushing and screening device for producing high-purity lithium oxide. It is equipped with several air inlet pipes tangential to the cylinder, creating a high-speed swirling airflow within the cylinder. Lithium hydroxide enters the cylinder and is separated by the airflow. Lighter lithium hydroxide rises with the airflow to the columnar filter screen, is screened, and then discharged from the outlet pipe. Heavier lithium hydroxide falls onto a rotating disc, where it is crushed at high speed by the rotating crushing blades. The crushed lithium hydroxide is then carried upwards by the airflow, thus achieving efficient crushing and screening, preventing lithium hydroxide from accumulating in the cylinder and causing blockages, and ensuring the reliability and stability of the device.

[0005] The technical solution adopted in this utility model is as follows: A pneumatic crushing and screening device for producing high-purity lithium oxide includes a cylinder. A motor is installed at the bottom of the cylinder, and the output shaft of the motor movably passes through the bottom of the cylinder and is connected to a rotating disk. Several crushing blades are arranged on the rotating disk. Several air inlet pipes tangential to the cylinder are arranged on the outer wall of the cylinder. A feed pipe is arranged on the cylinder above the air inlet pipes. A connecting plate is connected to the top of the cylinder, and a discharge pipe is arranged on the connecting plate. A columnar filter screen is connected to the discharge pipe.

[0006] Preferably, the connecting plate is provided with an annular purge air pipe sleeved on the outside of the discharge pipe, and the bottom of the connecting plate is provided with an annular air curtain guide groove, which is connected to the annular purge air pipe through several pipes.

[0007] Preferably, the bottom of the columnar filter screen is provided with a tapered guide.

[0008] Preferably, the blade of the crushing blade faces the same direction as the rotation of the rotating disk, and the rotation direction of the rotating disk is opposite to the airflow direction of the air intake pipe.

[0009] Preferably, the air inlet pipe is located below the rotating disk, and the side wall of the rotating disk is spaced apart from the inner wall of the cylinder.

[0010] Preferably, the outer side of the columnar filter screen is fitted with a flow guide baffle at intervals, and the outer wall of the flow guide baffle is connected to a vertically arranged connecting plate, which is fixedly connected to the inner wall of the cylinder.

[0011] Preferably, the inner wall of the cylinder is provided with a scratch-resistant and non-stick coating.

[0012] Preferably, the bottom of the columnar filter screen is rotatably connected to the rotating disk.

[0013] Preferably, a support platform is fixedly connected to the bottom of the cylinder.

[0014] Preferably, the air intake pipe is provided with 3.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: Several air inlet pipes tangential to the cylinder body create a high-speed swirling airflow within the cylinder. Lithium hydroxide enters the cylinder and is separated by the airflow. Lighter lithium hydroxide rises with the airflow to the columnar filter screen, is screened, and then discharged from the outlet pipe. Heavier lithium hydroxide falls onto the rotating disc, where it is crushed at high speed by the rotating crushing blades. The crushed lithium hydroxide is then carried upwards by the airflow, thus achieving efficient crushing and screening. This prevents lithium hydroxide from accumulating in the cylinder and causing blockages, ensuring the reliability and stability of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the front cross-sectional structure provided for an embodiment of the present utility model; Figure 3 This is a top view cross-sectional structural diagram provided for an embodiment of the present utility model; Figure 4 A schematic diagram of the connecting disk structure provided in an embodiment of this utility model.

[0018] Reference numerals in the attached drawings: 1-Motor; 2-Support platform; 3-Inlet pipe; 4-Cylinder body; 5-Annular purge pipe; 6-Outlet pipe; 7-Connecting disc; 8-Inlet pipe; 9-Crushing blade; 10-Guide baffle; 11-Connecting plate; 12-Annular air curtain guide groove; 13-Columnar filter screen; 14-Conical guide component; 15-Rotating disc. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] The following is combined with Figures 1-4 This utility model will be described in detail.

[0023] Example A pneumatic crushing and screening device for producing high-purity lithium oxide includes a cylinder 4. A motor 1 is installed at the bottom of the cylinder 4. The output shaft of the motor 1 movably passes through the bottom of the cylinder 4 and is connected to a rotating disk 15. Several crushing blades 9 are arranged on the rotating disk 15. Several air inlet pipes 3 are arranged on the outer wall of the cylinder 4 and are tangent to the cylinder 4. A feed pipe 8 is arranged on the cylinder 4 above the air inlet pipes 3. A connecting disk 7 is connected to the top of the cylinder 4. A discharge pipe 6 is arranged on the connecting disk 7 and a columnar filter screen 13 is connected to the discharge pipe 6.

[0024] Several air inlet pipes 3 tangential to the cylinder 4 are installed, which can form a high-speed swirling airflow inside the cylinder 4, optimizing the airflow distribution. Lithium hydroxide enters the cylinder 4 from the feed pipe 8 and is separated by the airflow. The lighter lithium hydroxide is carried upward by the airflow to the columnar filter screen 13 and is discharged from the discharge pipe 6 after being screened. The heavier lithium hydroxide falls to the rotating disk 15. The motor 1 drives the rotating disk 15 and the crushing blade 9 to rotate at high speed to crush the heavier lithium hydroxide. The crushed lithium hydroxide is then carried upward by the airflow, thereby achieving efficient crushing and screening, avoiding the accumulation of lithium hydroxide inside the cylinder 4 and causing blockage (blocking the rotation gap of the rotating disk 15 and affecting the rotation of the rotating disk 15), and ensuring the reliability and stability of the device.

[0025] The crushing blades 9 are divided into 6-10 groups, with each blade 9 arranged in a staggered manner. The rotating disk 15 rotates at a speed of 2000-5000 rpm. The connecting disk 7 is detachably connected to the cylinder 4 via threads and nuts, and the columnar filter screen 13 is detachably connected to the discharge pipe 6 via threads and nuts. When needed, the connecting disk 7 can be removed to replace the columnar filter screen 13 with different aperture sizes. The particle size of lithium hydroxide can be controlled by adjusting the aperture size of the columnar filter screen 13, and the crushing efficiency of lithium hydroxide can also be controlled by controlling the rotation speed of the rotating disk 15. The lithium hydroxide screened by the columnar filter screen 13 is carried by airflow through the discharge pipe 6 into the pretreatment rotary kiln.

[0026] A ring-shaped purge air pipe 5 is fitted onto the outside of the discharge pipe 6 on the connecting plate 7. A ring-shaped air curtain guide groove 12 is located at the bottom of the connecting plate 7, and the ring-shaped air curtain guide groove 12 is connected to the ring-shaped purge air pipe 5 via several pipes. The ring-shaped purge air pipe 5 is connected to an external air source. The air source blows a purge airflow evenly into the ring-shaped air curtain guide groove 12 through the ring-shaped purge air pipe 5 to form a purge air curtain to clean the columnar filter screen 13, preventing clogging and reducing the frequency of downtime maintenance. Flow sensors can be installed in the discharge pipe 6 and the inlet pipe 3. The flow sensors are connected to a controller, which is connected to the air source delivery device of the ring-shaped purge air pipe 5. When the air flow rate of the discharge pipe 6 drops below 80% of the total air flow rate of the inlet pipe 3, the purge air curtain is automatically activated for purge operation.

[0027] A tapered guide 14 is provided at the bottom of the columnar filter screen 13. The tapered guide 14 can guide the airflow at the bottom of the columnar filter screen 13 to move upward, ensuring the smooth delivery of lithium hydroxide.

[0028] The blade of the crushing blade 9 faces the same direction as the rotation of the rotating disk 15, and the rotation direction of the rotating disk 15 is opposite to the airflow direction of the air intake pipe 3. The direction of movement of the crushing blade 9 is opposite to the airflow direction of the air intake pipe 3, which can increase the relative speed of the collision between the lithium hydroxide and the crushing blade 9. Under the drive of the high-speed swirling airflow, the lithium hydroxide collides with the high-speed rotating crushing blade 9, increasing the crushing effect.

[0029] The air inlet pipe 3 is located below the rotating disk 15, and the side wall of the rotating disk 15 is spaced apart from the inner wall of the cylinder 4. The inner wall of the cylinder 4 is provided with an anti-scratch and anti-stick coating. The airflow output from the air inlet pipe 3 can flow out at high speed through the gap between the rotating disk 15 and the cylinder 4, thereby preventing lithium hydroxide from entering the rotation gap of the rotating disk 15. At the same time, it makes the strong cyclone adhere tightly to the inner wall of the cylinder 4, and with the anti-scratch and anti-stick coating, it prevents lithium hydroxide from sticking to the inner wall of the cylinder 4.

[0030] Among them, the anti-scratch and anti-stick coating can be made of polyetheretherketone, nano-ceramics, etc. If the sensitivity of lithium hydroxide to purity is considered, the inner wall of the cylinder 4 can be made smooth enough through the processing technology to avoid the use of coating.

[0031] A flow guide baffle 10 is fitted at intervals on the outer side of the columnar filter screen 13. A vertically arranged connecting plate 11 is connected to the outer wall of the flow guide baffle 10, and the connecting plate 11 is fixedly connected to the inner wall of the cylinder 4. The flow guide baffle 10 extends the movement path of the rising airflow, optimizes the airflow path, and allows the heavier lithium hydroxide to be fully separated from the airflow, avoiding the direct adsorption of the heavier lithium hydroxide onto the columnar filter screen 13 and causing mesh blockage.

[0032] A scratch-resistant and non-stick coating can also be applied to the surface of the flow guide baffle 10 to prevent lithium hydroxide from sticking.

[0033] The bottom of the columnar filter screen 13 is rotatably connected to the rotating disk 15. The columnar filter screen 13 can increase the stability of the rotation of the rotating disk 15.

[0034] A support platform 2 is fixedly connected to the bottom of the cylinder 4. The support platform 2 can support the cylinder 4, ensuring its stability, and at the same time, it provides space for the installation of the motor 1.

[0035] There are three air inlet pipes 3. In this application, three air inlet pipes 3 are provided to deliver airflow to meet the minimum usage requirements. The feed pipe 8 is tangent to the cylinder 4, and the direction of the lithium hydroxide output from the feed pipe 8 is the same as the airflow direction, so that the lithium hydroxide can be rotated along with the airflow.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic crushing and screening device for producing high-purity lithium oxide, comprising a cylinder (4), characterized in that, A motor (1) is installed at the bottom of the cylinder (4). The output shaft of the motor (1) passes through the bottom of the cylinder (4) and is connected to a rotating disk (15). Several crushing blades (9) are provided on the rotating disk (15). Several air inlet pipes (3) tangent to the cylinder (4) are provided on the outer wall of the cylinder (4). A feed pipe (8) located above the air inlet pipe (3) is provided on the cylinder (4). A connecting disk (7) is connected to the top of the cylinder (4). A discharge pipe (6) is provided on the connecting disk (7). A columnar filter screen (13) is connected to the discharge pipe (6).

2. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The connecting plate (7) is provided with an annular purge air pipe (5) sleeved on the outside of the discharge pipe (6). The bottom of the connecting plate (7) is provided with an annular air curtain guide groove (12), which is connected to the annular purge air pipe (5) through several pipes.

3. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The bottom of the columnar filter screen (13) is provided with a tapered guide (14).

4. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The blade of the crushing blade (9) faces the same direction as the rotation of the rotating disk (15), and the rotation of the rotating disk (15) is opposite to the airflow direction of the intake pipe (3).

5. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The air intake pipe (3) is located below the rotating disk (15), and the side wall of the rotating disk (15) is spaced apart from the inner wall of the cylinder (4).

6. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The columnar filter screen (13) is fitted with a flow guide baffle (10) at intervals on the outer side. The outer wall of the flow guide baffle (10) is connected to a vertically arranged connecting plate (11), which is fixedly connected to the inner wall of the cylinder (4).

7. A pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 6, characterized in that, The inner wall of the cylinder (4) is provided with a scratch-resistant and non-stick coating.

8. The pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The bottom of the columnar filter screen (13) is rotatably connected to the rotating disk (15).

9. A pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The bottom of the cylinder (4) is fixedly connected to a support platform (2).

10. A pneumatic crushing and screening device for producing high-purity lithium oxide according to claim 1, characterized in that, The air intake pipe (3) has three parts.

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