Petroleum coke is a product that is converted from crude oil through the distillation of light and heavy oils, and then through the process of thermal cracking. Petroleum coke has its unique physical, chemical and mechanical properties. It is the non-volatile carbon in the heat-generating part. The volatiles and mineral impurities (sulfur, metal compounds, water, ash, etc.) determine the chemical properties of coke. The porosity and density of the physical properties determine the reactivity and thermophysical properties of coke. Mechanical properties are affected by hardness, wear resistance, strength and other mechanical properties, particle composition and other processing, transportation, stacking, storage and other properties.
Depending on its quality, petroleum coke can be used for graphite production, smelting and chemical industries. Low-sulfur, high-quality cooked coke, such as needle coke, is mainly used to manufacture ultra-high-power graphite electrodes and some special carbon products; needle coke is an important material for the development of new electric furnace steelmaking technology in the steelmaking industry. Used extensively in aluminum smelting. High-sulfur, ordinary green coke is used in chemical production, such as the manufacture of calcium carbide, silicon carbide, etc., and also as a fuel for metal casting. Most of the petroleum coke produced in China is low-sulfur coke, which is mainly used for aluminum smelting and graphite production.