GPC and CPC are both types of carbon materials that are used in various industries. Here are some key differences between GPC and CPC:

Raw Material: GPC, or Graphite Petroleum Coke, is made from low-sulfur petroleum coke, while CPC, or Calcined Petroleum Coke, is made from green petroleum coke that has been calcined at a high temperature.

Carbon Content: GPC typically has a higher carbon content than CPC, with a carbon content of around 98-99%, while CPC has a carbon content of around 97-98%.

Ash Content: GPC typically has a lower ash content than CPC, with an ash content of around 0.5% or less, while CPC can have an ash content of up to 1%.

Uses: GPC is often used as a carbon additive in the steel and aluminum industries, while CPC is commonly used in the production of anodes for the aluminum industry, as well as in the production of steel and titanium dioxide.