WHY GRAPHITE ELECTRODE?
Graphite electrode, a conductor that releases electric energy in the form of an electric arc, is used to heat and melt the steel scraps in an electric arc furnace. They are currently the only products with high electrical conductivity and are able to maintain extremely high heat generation in this demanding environment. With the growing demand for quality steel in the aerospace, automotive and electronics industries, graphite electrodes are also becoming increasingly popular.
Classification of graphite electrodes’ raw material
1.Graphite material has better electrochemical stability. This type of electrode has low loss ratio.
2.Graphite electrode is easy to process and the processing speed is obviously faster than that of copper electrode.
3.Graphite is light in weight and has good thermal & electrical conductivity.
CLASSIFICATION OF GRAPHITE ELECTRODES
UHP GRAPHITE ELECTRODE
It is made of high-grade needle coke and treated with Lengthwise Graphitization (LWG). The graphitization temperature can be up to 2800 °C – 3000 °C. Finished products have lower electrical resistance & linear expansion, good thermal shock resistance and allow a larger current density.
HP GRAPHITE ELECTRODE
It adopts quality petroleum coke or low grade needle coke as raw material.
Its physical and mechanical properties are higher than RP graphite electrode such as lower electrical resistance and allowing a greater current density.
RP GRAPHITE ELECTRODE
This type of graphite electrode is treated with low graphitization temperature.
The allowable current density is lower than HP graphite electrode’s.
Regular power graphite electrodes are specified with allowable current density less than 17 A/cm2.
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