Raw material selection and crushing: Select high-quality petroleum coke carbon materials, process them through screening and crushing, and crush them into appropriate particle sizes.
Roasting: Place the appropriately sized petroleum coke carbon materials into a high-temperature furnace for roasting treatment. Roasting not only helps purify and upgrade the petroleum coke, making it have higher calorific value and better physical properties, but it is also an important preparatory step for the graphitization process.
Cooling and sorting: Cool the roasted petroleum coke blocks to reduce their temperature. Subsequently, mechanically sort the petroleum coke blocks to remove unqualified products and ensure product quality.
Graphitization treatment: Perform graphitization treatment on the cooled petroleum coke. This step typically involves high-temperature graphitization, where the petroleum coke blocks are placed in a graphitization furnace and treated at high temperatures (usually between 2800°C and 3000°C). During this process, residual impurities in the petroleum coke blocks gradually volatilize, while the carbon elements rearrange to form a denser graphite structure, ultimately resulting in high-purity graphitized petroleum coke.
After the above steps, the carbon molecules of the petroleum coke change from irregular arrangement to a uniformly hexagonal arrangement, completing the graphitization process. The graphitized petroleum coke can better decompose in molten iron, so it is widely used as a high-quality carburizer in the steelmaking industry.
