... pretreatment of graphite electrode . After acid cleaning and high-temperature drying of the graphite electrode , the rest water, chloride salt will ... : Argon gas or nitrogen III,Structure DescriptionIt consists of furnace cover, furnace bottom, furnace grate, platform, vacuum system, electric control system and so ... made of 2000°C heat-treated graphite felt in the furnace. China Graphite Calciner ...