CN211136745U - Shaping coke particle production system for artificial graphite cathode material - Google Patents

Abstract

A production system for shaping coke particles for artificial graphite anode materials, including a raw material feed bin, a set of crushing devices and a set of shaping and grading devices, the crushing device set includes an ultra-fine mill, a cyclone collector, a A dust collector and a Roots blower, the feed port of the ultra-fine mill is connected to the raw material feed bin through a pipeline, and the shaping and grading group includes an ultra-fine impact mill, an airflow classifier, a Cyclone collector, a dust collector and a Roots blower. The automatic production system provided by the utility model can obtain coke particles with a particle size of 3-45 μm with smooth surface and uniform particle size, and can simultaneously complete artificial graphite crushing, shaping, grading, packaging of finished products and packaging of tailings, effectively controlling material dust production, the quality of the obtained products is stable, without manual duty, environmental protection and no pollution.

Description

Shaping coke particle production system for artificial graphite anode material

technical field

The utility model patent relates to a production system, in particular to a production system for shaping coke particles for artificial graphite negative electrode materials.

Background technique

Lithium-ion batteries have a series of advantages such as high specific capacity, high operating voltage, good safety, and no memory effect, and are widely used in many portable electronic instruments such as notebook computers, mobile phones and instruments. With the popularization of new energy vehicles, its application scope has expanded to electric vehicles, automobiles and other fields.

As one of the core components of lithium-ion batteries, the negative electrode material plays a key role in the overall performance of the battery. Among the existing anode materials, artificial graphite has become a commercialized anode material for lithium-ion batteries due to its advantages of good compatibility with electrolyte, good cycle performance and rate performance. However, the general artificial graphite particles (petroleum coke, needle coke, pitch coke) are irregular in shape, non-uniform in particle size, large in specific surface area, low in tap density, and high in anisotropy, resulting in poor material processing performance, pole piece rebound, Problems such as flatulence and deformation of the battery are prominent. Therefore, how to obtain artificial graphite particles with regular shape and uniform particle size, improve their tap density and isotropy, and improve the cycle performance and safety performance of the cell has always been the focus of research and development of artificial graphite-based anode materials.

Utility model content

The purpose of the utility model is to make up for the deficiencies of the prior art, and to provide a production system for shaping coke particles for artificial graphite negative electrode materials.

The utility model achieves the purpose of the invention through the following technical solutions: a production system for shaping coke particles for artificial graphite negative electrode materials, including a raw material feeding bin, a group of pulverizing devices and a group of shaping and grading devices;

The crushing device group includes an ultra-fine mill, a cyclone collector, a dust collector and a Roots blower, and the feed port of the ultra-fine mill is connected to the raw material feed bin through a pipeline, The shaping and grading device group includes an ultra-micro impact mill, an airflow classifier, a cyclone collector, a dust collector and a Roots blower.

Further, the discharge port of the ultrafine grinding in the crushing device group is connected with the feed port of the cyclone collector, the discharge port above the cyclone collector is connected with the dust inlet port of the dust collector, and the cyclone The discharge port at the bottom of the collector is connected with the feed port of the ultra-micro impact mill, the air outlet above the dust collector is connected with the Roots fan, and the discharge port at the bottom of the dust collector is connected with the dust removal in the shaping and grading device group through the pipeline. The outlet at the bottom of the device is connected.

Further, the discharge port of the ultra-micro impact mill in the described shaping and grading device group is connected with the feed port of the air classifier, and the discharge port above the air classifier is connected with the feed port of the cyclone collector. The discharge port at the bottom of the air classifier is connected to the automatic packaging line for finished products, the discharge port above the cyclone collector is connected to the dust inlet port of the dust collector, and the discharge port below the cyclone collector is connected to the discharge port below the dust collector. The material port is connected in parallel with the tail material automatic packaging line, and the air outlet above the dust collector is connected with the Roots blower.

The beneficial effects of the present utility model:

1. First, the artificial graphite is pulverized into coke particles with a particle size of 3-45 μm by the ultra-fine mill in the pulverizing device group, and then the surface of the coke particles is smoothed by the ultra-fine impact mill in the shaping and grading device group. The fine powder produced in the shaping process is removed to obtain coke particles with smooth surface and uniform particle size.

2. Each process is connected to the next process through the conveying pipeline, the production process is fully sealed, and the dust-laden airflow is concentrated into the dark ditch after being dedusted, and then enters the secondary dedusting treatment to achieve pollution-free discharge.

Description of drawings

Fig. 1 is the process flow schematic diagram of the utility model.

FIG. 2 is a scanning electron microscope image of the coke particles collected by the cyclone collector 3 .

Figure 3 is a scanning electron microscope image of shaped focal particles.

Detailed ways

The process flow diagram of the present utility model is shown in Figure 1.

Marked in Figure 1: 1 is the feed bin, 2 is the ultrafine mill, 3 and 8 are the cyclone collector, 6 is the ultrafine impact mill, 7 is the air classifier, 4 and 9 are the dust collector, 5 and 10 is the Roots blower.

The present utility model will be described in further detail below in conjunction with the accompanying drawings. The shaping coke particle production system for artificial graphite anode material, as shown in Figure 1, starts the roots blowers 5 and 10 to form negative pressure, and the artificial graphite (petroleum coke, needle coke, pitch coke) in the feeding bin 1 flows into the pipeline through the pipeline After the ultrafine mill 2 is pulverized, the coke particles with a particle size of less than 45 μm enter the cyclone collector 3 for separation, and the fine particles with a particle size of less than 3 μm enter the dust collector 4 from the outlet above the cyclone collector 3. The blower 5 is connected, and the discharge port at the bottom of the dust collector 4 is connected with the discharge port at the bottom of the dust collector 9 through the pipeline. The 3-45μm coke particles collected from the discharge port under the cyclone collector 3 will enter the ultra-micro impact mill through the pipeline. 6. Shaping is performed, and the shaped coke particles flow into the air classifier 7 from the discharge port of the ultra-micro impact mill 6, and the fine powder produced during the shaping process will enter the cyclone collector 8 from the discharge port above the air classifier 7. , the discharge port below the air classifier 7 is connected to the automatic packaging line for finished products, the discharge port above the cyclone collector 8 is connected to the dust inlet port of the dust collector 9, and the discharge port below the cyclone collector 8 is connected with the discharge port below the dust collector 9. The outlet is connected in parallel to the tailings automatic packaging line, and the air outlet above the dust collector 9 is connected to the Roots blower 10 .

The working principle of the utility model is as follows: the artificial graphite is pulverized into coke particles with a particle size of 3-45 μm by ultrafine grinding, and the coke particles collected by the cyclone collector 3 are irregular in shape and uneven in particle size (see FIG. 2 ), which is used as a negative electrode. It will lead to problems such as poor material processing performance, pole piece rebound, and poor circulation performance. The particle size is uniform (see Figure 3), and it has good processing performance as a negative electrode material, low rebound of the pole piece, and good cycle performance.

As mentioned above, embodiment of this invention was described. However, this invention is not limited to the said embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (1)

1. The system for producing the shaped coke particles for the artificial graphite cathode material is characterized by comprising a raw material feeding bin (1), a group of crushing devices and a group of shaping and grading devices, wherein each crushing device group comprises an ultrafine mill (2), a first cyclone collector (3), a first dust remover (4) and a first Roots blower (5), each shaping and grading device group comprises an ultrafine impact mill (6), an airflow classifier (7), a second cyclone collector (8), a second dust remover (9) and a second Roots blower (10), a feeding hole of the ultrafine mill (2) is connected with the raw material feeding bin (1) through a pipeline, a discharging hole of the ultrafine mill (2) is connected with a feeding hole of the first cyclone collector (3), a discharging hole above the first cyclone collector (3) is connected with a dust inlet of the first dust remover (4), a discharge port below the first cyclone collector (3) is connected with a feed port of an ultramicro impact mill (6), an air outlet above the first dust remover (4) is connected with a first Roots blower (5), a discharge port below the first dust remover (4) is connected with a discharge port below the second dust remover (9) through a pipeline, a discharge port of the ultramicro impact mill (6) is connected with a feed port of an airflow classifier (7), a discharge port above the airflow classifier (7) is connected with a feed port of a second cyclone collector (8), a discharge port below the airflow classifier (7) is connected with a finished product automatic packaging line, a discharge port above the second cyclone collector (8) is connected with a dust inlet of the second dust remover (9), a discharge port below the second cyclone collector (8) is connected with a discharge port below the second dust remover (9) in parallel with a tail material automatic packaging line, and an air outlet above the second dust remover (9) is connected with a second Roots blower (10).

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