The core purpose of graphite electrode anti-oxidation treatment technology is to effectively isolate high-temperature oxygen by forming a dense protective layer on or inside the graphite electrode, thereby reducing the oxidation consumption of the graphite electrode, slowing down the oxidation rate, and reducing the unit consumption of the electrode.
This technology is mainly divided into coating method and impregnation method. The coating method involves applying an anti-oxidation coating to the electrode surface using an alternating spraying-melting method. The coating mainly consists of inorganic sodium silicate and inorganic fillers. This brush-type electrode coating requires minimal site requirements and no equipment. The impregnation method uses negative or pressurized impregnation to penetrate the liquid into the electrode substrate, allowing the liquid to seep into the micropores. After drying, a high-temperature resistant ceramic film is formed. Industry standard YB/T 6047-2022 specifies the requirements for anti-oxidation graphite electrodes made from machined graphite electrodes as the substrate through borate impregnation.
Graphite electrodes treated with antioxidants exhibit characteristics such as smooth surface, good conductivity, increased mechanical strength by 50-60%, reduced porosity by 10-15%, and reduced electrode consumption by 20-25%. Antioxidants for graphite electrodes can reduce unit graphite electrode consumption by 10-17%, antioxidant coatings can reduce unit consumption by 13-20%, and surface coating with an antioxidant protective layer can reduce electrode consumption during steelmaking (19%-50%).
