1, calcined coke is the product of high-temperature calcination of petroleum coke, which can be easily distinguished by removing water and volatiles, shrinking volume, increasing strength, decreasing resistivity and exposing pores. From the surface, the calcined coke is sparkling together (also mixed with some black calcined coke, which is covered with a layer of pyrolytic carbon film, but not burnt), and the packing density of petroleum coke is high.

2. Most refineries in China only produce raw coke, and most calcination operations are carried out in carbon plants. During the calcination process, the structure and elemental composition of various carbonaceous raw materials have undergone a series of profound changes, thus improving their physical and chemical properties. The calcination quality of petroleum coke has a great influence on the quality of finished carbon materials and the technical indexes of each process, so ensuring the calcination quality of raw materials is an important prerequisite to ensure the quality of final products.