The development direction of the graphitization furnace is an internal heat tandem graphitization furnace.since the current density of the tandem column is the same,the difference in electrode resistivity is small. The development direction of graphitization furnace is an internal heat tandem graphitization furnace.since the current density of the tandem column is the same,the difference in electrode resistivity is small;secondly,teh resistivity of the two ends of the graphitized product is slightly lower than that of the middle part(the graphitized product of the Acheson furnace is higher in resistivity than the middle part).it is beneficial to reduce the resistance of the joint at the time of user’s use and alleviate the phenomenon of overheating and redness at the joint of the joint.therefore,the uniformity of the electrode produced by the tandem graphitization furnace is better than that of the Acheson furnace ,and is more suitable for the production of electric arc furnace steelmaking.