Carbon and graphite products Graphite electrodes
Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar as binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. They are conductors that release electric energy in the form of arc in an arc furnace to heat and melt the charge. According to their quality indicators, they can be divided into ordinary power, high power and ultra-high power. Graphite electrodes include:
1. Ordinary power graphite electrodes. Graphite electrodes with a current density of less than 17A/cm2 are allowed to be used, mainly used in ordinary power electric furnaces for steelmaking, silicon refining, yellow phosphorus refining, etc.
2. Anti-hydrogenation coated graphite electrodes. Graphite electrodes with a layer of anti-oxidation protective layer on the surface form a protective layer that is both conductive and resistant to high-temperature hydrogenation, reducing electrode consumption during steelmaking.
3. High-power graphite electrodes. Graphite electrodes with a current density of 18~25A/cm2 are allowed to be used, mainly for high-power arc furnaces for steelmaking.
4. Ultra-high power graphite electrodes. Graphite electrodes with a current density greater than 25A/cm2 are allowed to be used. Mainly used in ultra-high power steelmaking arc furnaces.
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