HP Graphite Electrodes
Graphite electrode is made of high quality calcined petroleum coke, imported needle coke and modified coal asphalt, the grade are RP, HD(impregnation), HP and UHP graphite electrodes, the specification is Ø75-700mm.
Graphite electrode has the advantages of low resistivity, high electrical conductivity and thermal conductivity, good oxidation resistance,good thermal shock resistance, high mechanical strength,easy to machine,etc. Graphite electrode is widely used to smelt the steel, alloy steel and other metal or nonmetal material in electric arc furnace.
High power graphite electrodes are used in refining steel arc furnaces, using high-quality petroleum coke (or low-grade needle coke) as raw materials. After impregnation treatment, their electrical resistivity is low, allowing for an increase in current load, and their physical properties are higher than ordinary graphite electrodes.
| Item | Unit | Graphite Electrode | ||||
|---|---|---|---|---|---|---|
| RP | HP | UHP | ||||
| φ300-φ800mm | φ300-φ800mm | φ300-φ500mm | φ550-φ800mm | |||
| Typical Value | Typical Value | Typical Value | Typical Value | |||
| Resistivity | Electrode | μΩm | 7.0-10.0 | 5.8-6.6 | 4.5-5.8 | 4.6-5.8 |
| Nipple | 4.0-4.5 | 3.5-4.0 | 3.5-4.0 | 3.5-4.0 | ||
| Modulus of Rupture | Electrode | Mpa | 8.0-10.0 | 10.0-13.0 | 10.0-14.0 | 10.0-14.0 |
| Nipple | 19.0-22.0 | 20.0-23.0 | 20.0-24.0 | 22.0-26.0 | ||
| Young's Modulus | Electrode | GPa | 7.0-9.3 | 8.0-12.0 | 9.0-13.0 | 10.0-14.0 |
| Nipple | 12.0-14.0 | 14.0-16.0 | 15.0-18.0 | 16.0-19.0 | ||
| Bulk Density | Electrode | g/cm3 | 1.53-1.56 | 1.64-1.68 | 1.68-1.74 | 1.70-1.74 |
| Nipple | 1.70-1.74 | 1.75-1.80 | 1.78-1.82 | 1.80-1.84 | ||
| CTE (100-600ºC) | Electrode | 10-6/ºC | 2.2-2.6 | 1.6-1.9 | 1.1-1.4 | 1.1-1.4 |
| Nipple | 2.0-2.5 | 1.1-1.4 | 0.9-1.2 | 0.9-1.2 | ||
| Ash | % | 0.5 | 0.3 | 0.3 | 0.3 | |
