The production process of graphite electrodes generally includes: raw material (wool) → batching → kneading → extrusion molding → high temperature sintering (1550~1700°C) + heat treatment (1100~1200°C) + finishing.
1. Wool pretreatment: remove the impurities in the wool. The main method of impurities is to use water washing or alkali washing.
2. Ingredients: Add a certain amount of quartz sand when kneading, and put the mixed raw materials into the kneading equipment for kneading.
3. Kneading: Put the mixed raw materials into the center of the graphite extruder, and then knead and extrude the kneaded raw materials to form them in the graphite mold.
4. Roasting: Burn the mixed material with charcoal into red heat or combustible substances such as carbon black and charcoal powder, and then enter the next process.
5. Finishing: After the mold is formed, it needs to be cut, welded, polished and other processes.
6. Packaging: Molds must be inspected (including cleanliness and whether there are any damages and scratches, etc.) and sorted and stacked before they can be stored in the warehouse.