high power uhp graphite electrode

What are the precautions for using high power uhp graphite electrode in high temperature furnace

(1) The greater the amount of current applied to the high power uhp graphite electrode, the higher the surface temperature of the high power uhp graphite electrode. It is recommended to use the smallest possible surface load density (power). Please note that the value recorded at the cold end of the high power uhp graphite electrode is the current and voltage at 1000°C in the air, which is inconsistent with practical applications. Under normal conditions, the external power of the high power uhp graphite electrode is obtained from the relationship between the furnace temperature and the external temperature of the high power uhp graphite electrode. It is recommended to use the surface power of 1/2-1/3 of the limit density of the high power uhp graphite electrode. (W/cm2), high temperature resistant high power uhp graphite electrode

(2) High power uhp graphite electrodes can be connected in parallel as much as possible. If the resistance of the high power uhp graphite electrode is different, the load of the high power uhp graphite electrode with high resistance will be concentrated when connected in series, which will cause the resistance of a certain high power uhp graphite electrode to increase rapidly and shorten the lifespan.

(3) After the high power uhp graphite electrode is heated in the air, a dense silicon oxide film is formed on the surface, which forms an anti-oxidation maintenance film, which has the effect of extending the life. In recent years, various coatings have been developed to avoid cracking of the high power uhp graphite electrode and used in furnaces with various gases. Lubrication high power uhp graphite electrode

(4) The temperature distribution characteristics of the high power uhp graphite electrode. The reflection specification at the time of new shipment is to be considered as passing within Δ60℃ within the useful fever length. Of course, the temperature distribution will become larger as it ages, and it will eventually reach 200 ℃. The detailed temperature distribution changes are also different due to differences in furnace atmosphere and operating conditions.

(5) When continuing to use the high power uhp graphite electrode, I hope to add resistance slowly to maintain a long life.

(6) The higher the operating temperature, the shorter the service life of the high power uhp graphite electrode. Therefore, when the furnace temperature exceeds 1400℃, the oxidation speed will accelerate and the service life will be shortened. Please be careful not to make the surface temperature of the high power uhp graphite electrode too high during use.