Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing natural spherical plumbago with circular reshaping classification

A technology of spherical graphite and natural flake graphite, applied in the field of graphite powder preparation, can solve the problems of low production efficiency, uneven product quality, complex process, etc., and achieves improved production efficiency, improved distribution spacing and surface value, and quality stability. Good results

Inactive Publication Date: 2009-02-18
QINGDAO HENSEN GRAPHITE
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects that the existing preparation method of natural spherical graphite powder has complex process, uneven product quality and low production efficiency, and proposes a method for preparing natural spherical graphite by cyclic shaping and grading. The process is simple, the classification control precision is high, the quality of the prepared natural spherical graphite powder is stable, the impurities in it are removed more thoroughly, the fixed carbon content is high, and the production efficiency is improved at the same time, and the production environment will not be polluted.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Utilize the method preparation specification of the present invention to be that D50, particle size are that 20um, tap density are the steps of the natural spherical graphite of 0.98 as follows:

[0017] First, the natural flake graphite with a particle size between 80 mesh and 200 mesh is primary crushed in a mechanical pulverizer for 30 minutes to 1 hour, so that the average particle size of the crushed graphite particles is between 10um and 80um.

[0018] The primary pulverized graphite particles are directly connected to the air-flow vortex micro-powder through the pipeline: in the air-flow vortex micro-powder, the graphite particles are first spheroidized, ground and shaped, and then classified. When grading, the particle size, shape, tap density and surface area of ​​graphite particles are detected by laser particle size analyzer, microscopic imager, density meter and specific surface area meter respectively. The required natural spherical graphite, that is, spher...

Embodiment 2

[0023] Utilize the method preparation specification of the present invention to be that D50, particle size are that 17um, tap density are the steps of the natural spherical graphite of 1.02 as follows:

[0024] First, the natural flake graphite with a particle size between 80 mesh and 200 mesh is primary crushed in a mechanical pulverizer for 30 minutes to 1 hour, so that the average particle size of the crushed graphite particles is between 10um and 80um.

[0025] The primary pulverized graphite particles are directly connected to the air-flow vortex micro-powder through the pipeline: in the air-flow vortex micro-powder, the graphite particles are first spheroidized, ground and shaped, and then classified. When grading, the particle size, shape, tap density and surface area of ​​graphite particles are detected by laser particle size analyzer, microscopic imager, density meter and specific surface area meter respectively. The required natural spherical graphite, that is, spher...

Embodiment 3

[0030] Utilize the method preparation specification of the present invention to be that D50, particle size are that 12um, tap density are the steps of the natural spherical graphite of 1.02 as follows:

[0031] First, the natural flake graphite with a particle size between 80 mesh and 200 mesh is primary crushed in a mechanical pulverizer for 30 minutes to 1 hour, so that the average particle size of the crushed graphite particles is between 10um and 80um.

[0032]The primary pulverized graphite particles are directly connected to the air-flow vortex micro-powder through the pipeline: in the air-flow vortex micro-powder, the graphite particles are first spheroidized, ground and shaped, and then classified. When grading, the particle size, shape, tap density and surface area of ​​graphite particles are detected by laser particle size analyzer, microscopic imager, density meter and specific surface area meter respectively. The required natural spherical graphite, that is, spheri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing the graphite powder, in particular relates to a method for preparing the graphite powder that is applied to the cathode of the lithium-ion secondary battery, which aims at overcoming the weaknesses of the prior natural spherical graphite powder preparation method that the craftwork is complicated, the quality of the obtained product is uniform and the production efficiency is low, so that a method for preparing the natural spherical graphite in the cycling shaping classification way. The natural crystalline flake graphite is primarily crashed in a mechanical crashing machine, and is cycled for milling, shaping and classification in a plurality of shaping classification machines. The method has simple craftwork and high control precision of the classification; the quality of the prepared natural spherical graphite powder is stable; the foreign matters in the graphite can be thoroughly removed; the content of the fixed carbon is high; at the same time, the production efficiency is improved, and the method is free from polluting the production environment.

Description

technical field [0001] The invention relates to a preparation method of graphite powder, in particular to a preparation method of graphite powder used in negative electrodes of lithium-ion secondary batteries. Background technique [0002] With the global energy shortage, the energy-saving lithium battery industry has achieved unprecedented development, and various energy-consuming batteries are gradually replaced by lithium batteries. Lithium-ion secondary batteries are widely used due to their high voltage, good safety performance, no memory effect, long cycle life and no environmental pollution. With the development of portable electrical products, people have higher and higher requirements for the batteries used in them, which are mainly reflected in small size, long power consumption time, high-speed charging and discharging performance, and long service life, especially in the past two years. The power batteries required by electric bicycles, electric vehicles, and co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/04
Inventor 莫海波
Owner QINGDAO HENSEN GRAPHITE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com