RP graphite electrode is mainly made of petroleum coke. It is allowed to carry the current density less than 18A/cm2. Generally it is used in regular power electric arc furnace for steel making, silicon making, yellow phosphorus making etc.
The main differences between RP (Regular Power) graphite electrodes and HP (High Power) graphite electrodes are their properties and applications.
1.Power rating:
RP graphite electrodes are designed for regular power applications, with a relatively lower power rating compared to HP graphite electrodes.
2.Electrical conductivity:
Higher electrical conductivity compared to RP graphite electrodes, HP graphite electrodes are ideal for high-power electric furnace.
3.Different raw material content:
HP graphite electrodes consist of 30% needle coke, which reduces the electric resistance and lower coefficient of thermal expansion. RP graphite electrodes raw material exclude needle coke,inferior to HP graphite electrodes in terms of performance.
| Part | Resistance | Bending Strength | Young's Modulus | Bulk Density | CTE(100-600°C) |
| (μΩm) | (Mpa) | (Gpa) | (g/cm3) | (×10 -6/ﾟC) | |
| Electrode | 7.5-8.8 | 6.5-9.5 | 6.5-9.0 | 1.54-1.62 | 2.0-2.4 |
| Nippe | 5.0-6.5 | 16.0-22.0 | 10.0-16.0 | 1.73-1.78 | 1.7-2.0 |
