How is the graphitization achieved in graphite electrode production?
Graphitized carbon materials are carried out at a high temperature of 2200 ~ 3000 ℃, so the industry can only be achieved by electric heating, generally resistance heating or induction heating. In resistance heating furnaces, Acheson graphitization furnaces, directly energized internal heat tandem (LWG) graphitization furnaces and tubular resistance furnaces have been practically used. In the induction heating furnace, the graphite heating table is heated by high-frequency induction current or the heated body directly generates heat.
At present, graphite electrode production widely uses a direct electric heating graphitization furnace, that is, the current directly passes through the graphitized calcined product. At this time, the calcined product loaded into the furnace is both a conductor that generates a high temperature by the current and an object that is heated to a high temperature.