What are the steps in the manufacture of graphite electrodes?
Graphite electrode is an electrode made of graphite as raw material. It has the characteristics of high purity, high density, high strength and high conductivity, and is widely used in many fields.
Specifications Of RP HP UHP Graphite Electrode
| Items | Regular power(RP) | High power(HP) | Ultrahigh power(UHP) | |||||||
| ⌽200-300 | ⌽350-600 | ⌽700 | ⌽200-400 | ⌽450-600 | ⌽700 | ⌽250-400 | ⌽450-600 | ⌽700 | ||
| ResistanceμΩm(Max) | Electrode | 7.5 | 8.0 | 6.5 | 7.0 | 5.5 | 5.5 | |||
| Nipple | 6.0 | 6.5 | 5.0 | 5.5 | 3.8 | 3.6 | ||||
| BulkDensityg/cm3(Min) | Electrode | 1.53 | 1.52 | 1.53 | 1.62 | 1.60 | 1.62 | 1.67 | 1.66 | 1.66 |
| Nipple | 1.69 | 1.68 | 1.73 | 1.72 | 1.75 | 1.78 | ||||
| BendingStrengthMpa(Min) | Electrode | 8.5 | 7.0 | 6.5 | 10.5 | 9.8 | 10.0 | 11.0 | 11.0 | |
| Nipple | 15.0 | 15.0 | 16.0 | 16.0 | 20.0 | 20.0 | ||||
| Young'smodulusGpa(Max) | Electrode | 9.3 | 9.0 | 12.0 | 12.0 | 14.0 | 14.0 | |||
| Nipple | 14.0 | 14.0 | 16.0 | 16.0 | 18.0 | 22.0 | ||||
| Ash%(Max) | Electrode | 0.5 | 0.5 | 0.3 | 0.3 | 0.3 | 0.3 | |||
| Nipple | 0.5 | 0.5 | 0.3 | 0.3 | 0.3 | 0.3 | ||||
| CTE(100-600ºC)×10-6/ºC | Electrode | 2.9 | 2.9 | 2.4 | 2.4 | 1.5 | 1.4 | |||
| Nipple | 2.8 | 2.8 | 2.2 | 2.2 | 1.4 | 1.2 | ||||
The manufacturing process of graphite electrodes mainly includes the following steps:
Batch: Mix high-purity graphite powder, binder, conductive agent and other raw materials in a certain proportion.
Kneading: Put the mixed raw materials into a kneading machine, add an appropriate amount of water, and knead into a uniform slurry.
Molding: Put the kneaded slurry into a mold and pressurize it.
Roasting: Put the formed graphite blank into a roasting furnace and roast it at a certain temperature for a certain time to improve its strength and conductivity.
Processing: Process the roasted graphite blank, such as turning, drilling, etc., to obtain the required shape and size.
