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Jet mill for improving high-nickel single crystal crushing strength stability

A stable, jet mill technology, applied in grain processing and other directions, can solve problems such as unsmooth cutting, unfavorable cutting, and air source pressure fluctuations, preventing adhesion and bridging, reducing the influence of pressure difference, and stabilizing the air source. Effect

Pending Publication Date: 2021-12-28
当升科技(常州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most jet mill manufacturers use the air compressor to provide air source, buffer bin-flap valve-feeding motor to feed materials, and the loading and unloading of the air compressor will cause the air source pressure to fluctuate, and the material crushing effect will be affected. Influence: When the buffer bin-flap valve-feeding motor feeds, the air pressure in the grinding chamber will flow backwards, resulting in a pressure difference in the storage tank that is not conducive to feeding
Moreover, due to the high viscosity of the high-nickel single crystal material, the feeding is not smooth, which makes the material level in the grinding chamber unstable and cannot guarantee the particle size index
Many manufacturers monitor the material level by adding observation windows and weighing modules to the main body of the grinding chamber, but they cannot fundamentally solve the above problems

Method used

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  • Jet mill for improving high-nickel single crystal crushing strength stability
  • Jet mill for improving high-nickel single crystal crushing strength stability
  • Jet mill for improving high-nickel single crystal crushing strength stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: refer to Figure 1-2 , a jet mill for improving the stability of crushing force of high-nickel single crystals, comprising a buffer bin 1 and a crushing bin 6;

[0025] The lower part of the buffer storage bin 1 is provided with an upper storage tank 2, the lower part of the upper storage tank 2 is provided with a lower storage tank 3, and a first flap valve 4 is arranged between the buffer storage bin 1 and the upper storage tank 2, A second flap valve 5 is arranged between the upper storage tank 2 and the lower storage tank 3, a star feeder 8 is arranged on the lower side of the lower storage tank 3, and the discharge end of the star feeder 8 is provided with There is a feeding pipe 7, and the lower end of the feeding pipe 7 is connected with the feeding port of the pulverizing bin 6.

[0026] The cavity of the star feeder 8 is connected with an air supply pipe 9, and an air supply valve is installed on the air supply pipe 9. When the air supply valve...

Embodiment 2

[0031] Embodiment two: refer to image 3 The difference from Embodiment 1 is that the connecting part is a plurality of parallel connecting branch pipes 131, and branch valves are respectively installed on each connecting branch pipe 131, and the air flow can be dispersed and circulated through the plurality of connecting branch pipes 131 to reduce the local pressure difference. The number of connected connecting branch pipes 131 can be changed by switching the branch pipe valve, so as to control the flow rate of gas.

Embodiment 3

[0032] Embodiment three: refer to Figure 4 , on the basis of Embodiment 2, the connecting branch pipe 131 includes a straight wall connecting branch pipe 1311 and a plurality of curved wall connecting branch pipes 1312. Connected end to end, the segmental densities on the curved wall connecting branch pipes 1312 are different, the resistance of the airflow passing through the curved wall connecting branch pipes 1312 is greater than the resistance passing through the straight wall connecting branch pipes 1311, and the opening and closing of the branch pipe valves can change the connected connecting branch pipes 131. Thereby controlling the gas flow rate and resistance.

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Abstract

The invention relates to the field of jet mills, in particular to a jet mill for improving high-nickel single crystal crushing strength stability. The jet mill comprises a temporary storage bin and a crushing bin; an upper storage tank is arranged on the lower portion of the temporary storage bin, a lower storage tank is arranged on the lower portion of the upper storage tank, a first flap valve is arranged between the temporary storage bin and the upper storage tank, a second flap valve is arranged between the upper storage tank and the lower storage tank, a star-shaped feeder is arranged on the lower side of the lower storage tank, and a discharging pipe is arranged at the discharging end of the star-shaped feeder; the lower end of the discharging pipe is connected with a feeding port of the crushing bin; and a cavity of the star-shaped feeder communicates with an air supplementing pipe, and an air supplementing valve is installed on the air supplementing pipe. A pressure balance pipeline is additionally arranged between the upper storage tank and the lower storage tank, so that the upper storage tank and the lower storage tank communicate, the influence of pressure difference on the crushing particle size stability is reduced, the cavity of the star-shaped feeder communicates with the air supplementing pipe, air can be introduced into the cavity through the air supplementing pipe, and material adhesion and bridging are prevented.

Description

technical field [0001] The invention relates to the technical field of jet mills, in particular to a jet mill for improving the stability of crushing force of high-nickel single crystals. Background technique [0002] With the rapid development of electric vehicles, high-nickel single crystals have become a popular direction for the development of cathode materials due to their advantages such as high capacity and good cycle performance. During the synthesis process of high-nickel single crystal, it is sintered in an oxygen atmosphere in a roller furnace, which makes the material hard and difficult to break. The jet mill uses high-speed airflow as the power and carrier, and crushes through the collision of the material particles itself. It has the advantages of strong crushing ability, narrow particle size distribution, and smooth particle surface. However, due to the high viscosity of high-nickel single crystal materials, the feeding is not smooth, and The air source press...

Claims

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Application Information

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IPC IPC(8): B02C19/06B02C23/02B02C23/00
CPCB02C19/06B02C23/02B02C23/00
Inventor 张贺杰刘长威张杰关志波陈彦彬
Owner 当升科技(常州)新材料有限公司