Production characteristics of graphite electrodes

1. Long production cycle. The production cycle of ordinary power graphite electrodes is about 45 days, the production cycle of ultra-high power graphite electrodes is more than 70 days, and the production cycle of graphite electrode joints that requires multiple impregnations is longer.
2. High energy consumption. The production of 1 ton of ordinary power graphite electrode requires about 6000 kW h of electric energy, thousands of cubic meters of gas or natural gas, and about 1 ton of metallurgical coke particles and metallurgical coke powder.
3. There are many production processes. The production process includes calcination of raw materials, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. Its production requires a lot of special mechanical equipment and kilns with special structures, the construction investment is relatively large, and the investment recovery period is long.
4. A certain amount of dust and harmful gases are produced during the production process, and it is necessary to take comprehensive environmental protection measures for ventilation, dust reduction and elimination of harmful gases.
5. The carbonaceous raw materials required for production, such as petroleum coke and coal tar pitch, are by-products produced by oil refineries and coal chemical enterprises. The quality and stability of raw materials are difficult to be fully guaranteed, especially for the production of high-power and ultra-high-power graphite electrodes. Needle coke, modified electrode pitch and special impregnating agent pitch with low quinoline insoluble content urgently need the attention and active cooperation of my country's petroleum and coal chemical processing enterprises.