This graphite product is made with high-quality natural flake graphite. It also contains advanced processing technology that allows for graphite products to be produced with different levels of fineness and elliptical shape. Spherical graphite has the properties of high electrical conductivity and high crystallinity.
The processing principle is: First, you need to pulverize natural flake graphite powder to a size that can be used for particle size. Next, perform the de-angularization process, which will result in an ellipsoid, or spherical, shape. The fine powder that is removed during this process can be separated and the normal distribution for spherical Graphite can then be obtained.
spherical graphite, raw materials
The particle size of the spherical graphite material should be suitable. A higher cost is associated with a coarser particle size. Spherical graphite yields will suffer from a smaller particle size. An excess of auxiliary products will also increase the cost. 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 cost, the more purification passes are required. In turn, equipment wear and tear will rise. It is composed of 95%96% raw materials and has the lowest comprehensive cost after 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 grading equipment.
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, impurities found in the spherical graphite are dissolved into the reaction solution. They can be removed only by washing. The most common washing equipment in this process is the filter press and centrifuge. The filter press offers many benefits, such as a higher recovery rate, less running materials, low labor intensity and safety. However, it has a limited washing effect 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, the spherical carbonite becomes substandard after it is dried. This is mostly evident in the unqualified indicators and trace elements of carbon content. Drying equipment such as the drying kiln and microwave dryer are more common.
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