1. The greater the current applied to the graphite rod, the higher the surface temperature of the graphite rod. It is suggested to use the smallest possible surface load density (power).Please note that the values recorded on the cold end of the graphite rod are the current and voltage of 1000 ℃ in the air, which are consistent with the practical application. Under normal conditions, the apparent power of the graphite rod is obtained from the relationship between the temperature in the furnace and the apparent temperature of the graphite rod. It is recommended to use the appearance power (W / cm2) of 1 / 2-1 / 3 of the limit density of the graphite rod.

2. Graphite rods need to connecting in parallel as much as possible. If the resistance of graphite rods is different, the load of graphite rods with high resistance will be concentrated when connected in series, which will cause a certain graphite rod resistor to be added quickly, and the life will be shortened.

3. After the graphite rod is heated in the air, the surface forms a dense silicon oxide film, which forms an anti-oxidation maintenance film, which has the effect of extending its life. In recent years, various coatings have been developed to avoid the cracking of graphite rods and are used in furnaces with various gases.

4. The temperature distribution characteristics of graphite rods. The reflection specification at the time of new shipment is that the effective fever length is within Δ60 ℃. The temperature distribution will increase with aging and eventually reach 200 ℃. The detailed temperature distribution transition also differs due to differences in furnace atmosphere and application premises.

5. When continuing to use graphite rods, resistance should be added slowly to maintain the service life.

6. The higher the operating temperature, the shorter the life of the graphite rod. Therefore, after the furnace temperature exceeds 1400 ℃, the oxidation rate will be accelerated and the life will be shortened. During the operation, pay attention to not letting the surface temperature of the graphite rod be too high.