1.Ordinary power graphite electrode (RP), allow through the current density is less than 17A/cm2, the raw material is mainly petroleum coke, coal asphalt, the production cycle is about 45 days, mainly with ordinary steel, silicon, and yellow phosphorus, etc.

2.High power graphite electrode (HP), which allows the current density between 18~25A/cm2, raw materials for petroleum coke, coal pitch, add needle coke, the production cycle of about 60 days, mainly used for steel.

3.Ultra high power graphite electrode (UHP), allows the current density is greater than 25A/cm2, raw materials including petroleum coke, needle coke, coal pitch, Needle coke content is greater than high-power graphite electrode, the production cycle is more than 65 days, the main use is smelting fine steel, special steel.

The raw material cost accounts for more than 65% of the total graphite electrode cost. The key material of graphite electrodes is needle coke. The ultra-high power electrode made of needle coke can shorten the time of steel smelting by 30% ~ 50%, save electricity by 10% ~ 50%, and effectively reduce the cost of steel making. One ton of finished ultra-high power graphite electrodes contains 0.85 tons of needle coke, and it takes 1.05 tons of needle coke to produce one ton of ultra-high power graphite electrodes.

The diameter of the graphite electrode is 200-700mm, which is difficult to break through 700mm due to the limitation of the molding machine. The normal length is generally 1800-2000 mm, and the main length in China is generally 1800-2400 mm

Graphite electrode is a kind of product with high energy consumption and high emission. The production of one ton of graphite electrode consumes about 1.69 tons of standard coal, Each ton of standard coal produces about 2.66 tons of carbon dioxide, and a ton of graphite electrodes emits 4.48 tons of carbon. Therefore, future production expansion may be limited.