Lithium iron phosphate battery raw material grinding system

Abstract

The utility model discloses a lithium iron phosphate battery raw material grinding system which comprises a plurality of jet mills with different grinding fineness, the jet mills with the grinding fineness from low to high are sequentially connected, a screen is obliquely arranged at an outlet of each jet mill, a plurality of screen holes with different sizes are sequentially formed in each screen from top to bottom, and the screen holes are communicated with the jet mills. One kind of screen holes corresponds to the target fineness of one adjacent second jet mill and the target fineness of the subsequent jet mills, the screen holes are gradually enlarged from top to bottom, a pipeline is correspondingly connected below each kind of screen holes, and the pipelines are converged to an outlet of the jet mill corresponding to the target fineness. The problem that an existing material grinding system is low in material grinding efficiency is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium iron phosphate production and processing, and relates to a lithium iron phosphate battery raw material abrasive system. Background Art

[0002] In the production and processing of lithium iron phosphate, it needs to be ground finely. Currently, this is often achieved using multiple jet mills, starting with a smaller jet mill and then using jet mills with progressively larger finenesses, until the target fineness of the lithium iron phosphate is achieved. However, in production practice, after passing through the first jet mill, some lithium iron phosphate raw materials can already reach the fineness required by the second jet mill. At this point, further jet milling is meaningless and will also reduce grinding efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium iron phosphate battery raw material abrasive system, which solves the problem of low abrasive efficiency of the current abrasive system.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A lithium iron phosphate battery raw material abrasive system includes several air flow mills with different abrasive finenesses. The air flow mills with increasing abrasive fineness are connected in sequence. A screen is arranged obliquely at the outlet of the air flow mill. The screen is provided with several sieve holes of different sizes from top to bottom. One sieve hole corresponds to the target fineness of a second adjacent air flow mill and subsequent air flow mills. The sieve holes become larger step by step from top to bottom. A pipeline is connected to the bottom of each corresponding sieve hole, and the pipelines converge to the outlet of the air flow mill corresponding to the target fineness.

[0006] Furthermore, the lithium iron phosphate raw material is transferred between different jet mills by gravity.

[0007] Furthermore, materials are transported between different jet mills through a plurality of blowing devices.

[0008] Furthermore, the screen is connected to a vibration motor.

[0009] Furthermore, the screen is inclined at an angle of 20-40 degrees to the horizontal direction.

[0010] Furthermore, the inclination angle of the screen to the horizontal direction is 25±2 degrees.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the abrasive system of the present invention, when working, the raw material is ground by the first air flow mill. At the outlet of the air flow mill, the screens are provided with the target finenesses of the fifth, fourth, third and second air flow mills from top to bottom. The raw material of the target fineness of the fifth air flow mill is transported to the inlet of the sixth air flow mill through the pipeline, the raw material of the target fineness of the fourth air flow mill is transported to the inlet of the fifth air flow mill, the raw material of the target fineness of the third air flow mill is transported to the inlet of the fourth air flow mill, and the raw material of the target fineness of the second air flow mill is transported to the inlet of the third air flow mill. This is done at the outlet of each air flow mill, so that the raw materials can be separated as early as possible, meaningless grinding can be avoided, and the abrasive efficiency of the abrasive system can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort, among which:

[0014] Figure 1 This is a structural schematic diagram of a lithium iron phosphate battery raw material abrasive system according to an embodiment of the present utility model.

[0015] Markings in the figure:

[0016] 10-jet mill; 11-export;

[0017] 20-sieve; 21-sieve hole;

[0018] 30-Pipeline. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of 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 represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0021] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0022] As described in the background, the production and processing of lithium iron phosphate requires fine grinding. Currently, this is typically achieved using multiple jet mills, starting with a smaller jet mill and followed by jet mills with progressively larger finenesses, ultimately achieving the target fineness. However, in production practice, after passing through the first jet mill, some lithium iron phosphate raw materials have already reached the fineness achieved by the second jet mill. At this point, further jet milling is pointless and reduces grinding efficiency.

[0023] Based on this, the inventors created a lithium iron phosphate battery raw material abrasive system of the present application to solve the above technical problems.

[0024] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0025] Example

[0026] See also Figure 1 , a lithium iron phosphate battery raw material abrasive system, including a plurality of air flow mills 10 with different abrasive finenesses, and the air flow mills 10 with abrasive finenesses from low to high are connected in sequence. Here, the air flow mill 10 is a grinding device. The greater the abrasive fineness, the smaller the particle size of the surface raw material. Different air flow mills 10 are connected one by one in sequence from low fineness to high fineness, that is, the outlet 11 of the previous air flow mill 10 is connected to the inlet of the next air flow mill 10. For example, the lithium iron phosphate raw material can be transferred between different air flow mills 10 by the action of gravity, and the transfer is simple. In addition, the different air flow mills 10 can also be used to transport materials through a plurality of blowing devices, and the material at the outlet 11 of the previous air flow mill 10 is blown to the inlet of the next air flow mill 10 by blowing. The position requirements between each air flow mill 10 are relatively low.

[0027] A screen 20 is installed at an angle at the outlet 11 of the jet mill 10. The screen 20 is arranged with several sieve holes 21 of varying sizes, arranged sequentially from top to bottom. Each sieve hole 21 corresponds to the target fineness of the second and subsequent jet mills 10 adjacent to it, and the sieve holes 21 increase in size from top to bottom. This means that each sieve hole 21 corresponds to the target fineness of a particular jet mill 10, and the sizes of the different sieve holes 21 on the screen 20 gradually increase from top to bottom. The number of sieve hole types 21 is counted from the second jet mill 10 after the current one to the last jet mill 10. For example, the screen 20 can be connected to a vibration motor to improve its screening and transmission efficiency. A pipeline 30 is connected below each sieve hole 21, converging at the outlet 11 of the jet mill 10 corresponding to the target fineness. For example, the screen 20 can be tilted at an angle of 20-40 degrees from the horizontal, preferably 25±2 degrees.

[0028] In the abrasive system of the present invention, when working, the raw material is ground by the first air flow mill 10. At the outlet 11 of the air flow mill 10, the screen 20 is provided with the target finenesses of the fifth, fourth, third and second air flow mills 10 from top to bottom. The raw material of the target fineness of the fifth air flow mill 10 is transported to the inlet of the sixth air flow mill 10 through the pipeline 30, the raw material of the target fineness of the fourth air flow mill 10 is transported to the inlet of the fifth air flow mill 10, the raw material of the target fineness of the third air flow mill 10 is transported to the inlet of the fourth air flow mill 10, and the raw material of the target fineness of the second air flow mill 10 is transported to the inlet of the third air flow mill 10. This is done at the outlet 11 of each air flow mill 10, so that the raw materials can be separated as early as possible, meaningless grinding can be avoided, and the abrasive efficiency of the abrasive system can be effectively improved.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lithium iron phosphate battery raw material abrasive system, characterized in that: The invention comprises several air flow mills with different abrasive finenesses, wherein the air flow mills with increasing abrasive finenesses are connected in sequence, a screen is obliquely provided at the outlet of the air flow mill, and the screen is provided with several sieve holes of different sizes from top to bottom, one sieve hole corresponds to the target fineness of one of the adjacent second air flow mills and the subsequent air flow mills, the sieve holes become larger step by step from top to bottom, and a pipeline is connected to the bottom of each corresponding sieve hole, and the pipelines converge to the outlet of the air flow mill corresponding to the target fineness.

2. A lithium iron phosphate battery raw material abrasive system according to claim 1, characterized in that: The lithium iron phosphate raw material is transferred between different jet mills by gravity.

3. A lithium iron phosphate battery raw material abrasive system according to claim 1, characterized in that: Materials are transported between different jet mills through a plurality of blowing devices.

4. A lithium iron phosphate battery raw material abrasive system according to claim 1, characterized in that: The screen is connected to a vibration motor.

5. A lithium iron phosphate battery raw material abrasive system according to claim 4, characterized in that: The inclination angle of the screen to the horizontal direction is 20-40 degrees.

6. The lithium iron phosphate battery raw material abrasive system according to claim 1, characterized in that: The inclination angle of the screen to the horizontal direction is 25±2 degrees.

Images