Study on production technology of spherical graphite

Flake graphite can only be formed at extremely high temperatures and pressures. Because of this, crystallinity can be very high. The degree of graphitization may also be high. This gives rise to a reliable resource source for the mass production and distribution of lithium-ion materials. Over the past decade, China's graphite sector has witnessed a significant increase in the processing and production of spherical Graphite products.

Sphericalgraphite is made from high-quality natural flake graphite with high-carbon carbon. It uses advanced technology to alter the graphite's surface. The graphite produced by this process is of different fineness and has an elliptical-spherical appearance.

Spherical graphite uses advanced processing technology to alter its surface and produce graphite products that are different in fineness and shape. Flake graphite also makes spherical, but the technology required to produce sphere graphite from it is very high.
1. Recombination and synthesis of fine particles

Fine particle compounding involves the use of fine-particle compounding equipment to spheroidize small particles.

2. Wet grinding.

Spherical graphite production can be simplified by using wet grinding. This will reduce costs and improve the yield.

3. Ball milling with high-energy, and special crushing and classifying.

High-energy ball grinding and special crushing/grading have an effect on the promotion of cryptocrystalline graphite spheroidization. While graphite-spheres form are very uniform and fine in appearance, there are differences.

Process for spherical Graphite: First, natural flake crystal graphite must be crushed down to size. Then, it is processed to reduce the particle size and the de-cornerization process. Then, the fine powder that was removed during the process is separated and used to produce spherical graphite.
First, choosing graphite raw materials.

The particle size of the raw material should be suitable on the one hand. The cost of the raw materials should be lower if they are too coarse. Conversely, spherical graphite's output will suffer if the particles are too fine. An excessive number of auxiliary products can also raise the cost of raw materials. Study have demonstrated that it is better to create spherical graphite with raw materials of less than 100 mesh.

Carbon content, on the other hand is a crucial factor. A higher carbon content means a higher cost of raw materials. A lower carbon content means that equipment will wear faster and cost more. The best overall price is when the total cost includes 95% to 96% raw material.

Concerning the second, the decision of which spherical Graphite Processing Equipment to use.

(1) A widely-used airflow vortex crusher in the spherical production process has the ability to both crush and produce chamfering. Also, quality and control of technical indicators for spheroidized graphite can be directly affected by the choice of equipment.

(2) Lithium ion battery batteries have a high purity of graphite, which is often 99.95%. Purification is therefore essential in every step of the production process. The chemical purification method is currently used to produce high-purity graphite. Chemical raw materials include strong acid compounds. Purification equipment must therefore be resistant to acid and corrosion. Chemical purification must be done at a specific temperature so the equipment should also have a high resistance to heat.

(3) Once the chemical reaction has completed, any impurities present in the spherical graphite will be dissolved in the solution. The impurities cannot be removed by washing. Two types of washers are used during the chemical reaction: the filter press and the centrifuge. It has many benefits, such as a higher recovery rate, low running material, easy to use, and safety. There is no way to wash at a dead angle and the washing result is very poor. While the centrifuge's advantages are that it is efficient and produces good results, the drawbacks include: more running material, more waste, more labor intensity at discharge time, less safety, ease of infecibility to the filter press and greater water consumption. Combining the two is a good idea.

(4) After washing and purifying the material, dry the spherical carbonite. Keep moisture levels below 0.5%. The most common problem during drying is secondary pollution. This means that the spherical carbonite will become unqualified after drying. It is mainly caused by unqualified indicators for trace elements and carbon content. You can also use drying equipment such as a drying kiln and a microwave dryer.

Mis-asia, Misasia advanced material Tech Co., Ltd., a professional SPHERICAL Graphite CP producer with more than 12 years' experience in chemical products development and research. You can contact us to make an enquiry if you need high quality SPHERICAL Graphite CP.

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