Raw Materials and Processing Equipment of Spherical Graphite


Apr 1, 2023 ,

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Spherical graphite This graphite product is made with high-quality natural flake graphite. The graphite surface is modified by advanced technology to produce graphite products that have different finenesses and elliptical spherical shapes. Spherical graphite has the properties of high electrical conductivity and high crystallinity.
Spherical graphite The processing principle is: First, you need to pulverize natural flake graphite powder to a size that can be used for particle size. Then, you will need to de-angularize the material so it becomes ellipsoid, or spherical. The fine powder that is removed during this process can be separated and the normal distribution for spherical Graphite can then be obtained.
Selection criteria spherical graphite, raw materials

The particle size of the spherical graphite material should be suitable. Too fine a particle size results in higher costs. A smaller particle size can affect the yield of spherical graphite. Additionally, adding too many products to the mix will increase the price of raw materials. Study have shown that it is easier to use spherical-graphite-making raw materials with a particle size between -100 and -200 mesh.

A very important aspect of spherical-graphite raw materials is their carbon content. The carbon content of spherical graphite raw materials is a key factor. The higher the carbon, the more expensive the raw materials. Additionally, the purification passes required to remove it will increase, increasing the equipment’s wear and tear. Also, the overall cost will rise. It is composed of 95% to 96% raw materials and has the lowest comprehensive cost after practice and accumulation.

Selection criteria for spherical-graphite processing equipment

The airflow vortex-pulverizer is more used in the spherical processing. This has both the performance for pulverization as well as the ability to de-angularize. It is important to consider the quality of the equipment when selecting spheroidized Graphite.

Graphite anode material for lithium-ion batteries must be at least 99.95%. Purification is an essential part of the production process. Chemical purification is the most common method of producing high-purity, spherical graphite. Since the chemical raw materials used in the production process are strong acids, the purification equipment must be resistant to acid and corrosion. Chemical purification must be completed at a particular temperature. The equipment should also have a high resistance to heat.

After the chemical reactions, the impurities within the spherical graphite are dissolved into the reaction solution. Only then can the impurities be removed by washing. The main washing equipment is the centrifuge and filter press. The filter press offers many benefits, such as a higher recovery rate, lower running material, less labor intensity, safety, and easy operation. However the downside is that it has poor washing results and can leave behind dead corners. While the centrifuge offers more washing power and a more effective wash, there are some drawbacks. Combining them works well.

The spherical Graphite after being washed is dried to remove moisture. It is also controlled below 0.5%. The most common problem with drying is secondary pollution. That is, when the spherical carbonite has been washed and dried, it becomes substandard because of the inclusion of impurities. This is mostly evident in the unqualified indicators about carbon content or trace elements. Drying equipment such as the drying kilns and dryers in microwave ovens is also used.

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