1. Graphitization reaction temperature, the higher the temperature, the easier graphitization.

2. Processing time, different carbon has different reaction time, generally speaking, about 30 minutes of heat preservation is enough after reaching the temperature required for graphitization.

3. Treat the particle size of the material. The smaller the particle size is, the larger the relative surface area is, the faster the reaction is, and the impurities inside the particle are easier to react, but the particle is too small, which is not conducive to the exhaust gas formed by the impurities.

4. The way of material placement, the way of material placement has a great impact on gas flow path and thermal radiation, and also affects graphitization.

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