Carbon raiser, also known as recarburizer, is a carbon additive that is used in steelmaking and other industrial applications. It is commonly available in three different forms: Calcined Petroleum Coke (CPC), Graphitized Petroleum Coke (GPC), and Calcined Anthracite Coal (CAC).

CPC is a high-purity carbon material that is produced by heating green petroleum coke to a high temperature, typically above 1300°C. This process removes volatile matter, moisture, and other impurities, leaving a highly carbonaceous material with low ash content. CPC is widely used as a carbon raiser in steelmaking and other industrial applications, due to its high carbon content, low sulfur content, and excellent stability at high temperatures.

GPC is a highly graphitized form of petroleum coke that is produced by heating CPC to a high temperature, typically above 2500°C. This process converts the carbon in the coke to a highly ordered, crystalline form, which results in a material with excellent thermal and electrical conductivity, high strength, and low coefficient of thermal expansion. GPC is commonly used as a carbon raiser in high-quality steelmaking and other applications that require high-performance carbon materials.

CAC is a high-quality carbon material that is produced by heating anthracite coal to a high temperature, typically above 1200°C. This process removes volatile matter, moisture, and other impurities, leaving a highly carbonaceous material with low ash content. CAC is commonly used as a carbon raiser in steelmaking and other industrial applications, due to its high carbon content, low sulfur content, and excellent stability at high temperatures.