Petroleum coke, a solid black byproduct of the oil refining process, contains a high level of carbon. It is used as a feedstock to produce high-quality steel. Coke is used in power plants that burn coal and cement production. Coke's use can lower the overall emissions of these processes. The type of coal used will depend on the end product and its quality.
The physical properties can be determined by a variety of methods including gas adsorption testing, drainage and porosity. The pore structure in pet coke is what determines the performance of this material during chemical reactions. The higher the porosity of pet coke, the greater its contact area. This is why it is better for adsorption reactions.
Petroleum Coke of high quality is essential for the aluminum and steel industries. It has a very low resistivity that can help reduce the loss of power in the electrolytic smelting and increase efficiency. It has a good chemical stability, and it can also withstand the harsh corrosive conditions of the smelting processes.
High-quality calcined Petcoke can help reduce the cost of production for the Iron and Steel industries. It is an important raw material in the production of carbon additives for steelmaking and graphite electrodes used for electric furnace steelmaking. It is also used as a reduction agent in the blast furnace for iron melting.
Graphitized Petroleum Coke (also called coke-derived graphite or CG) refers to a high quality petroleum coke which has been graphitized to produce crystalline structures that are similar to graphite. This is a good substitute for graphite, especially in applications that need high thermal and electrical conductivity. CG may be produced either as sponge coke or shot size from fluid-bed cokers. Around one-third the petroleum coke in the United States goes into the production of CG. It is then used to make pre-baked products, anode / anode coal pastes and shaped materials such as bricks or anode / anode carbon for the aluminum and steel industries.
A high-quality calcined petrol coke will have a dense, deep surface and a stable texture. It is distinguished by a metallic finish and by its acicular structure from green-delayed oil coke. Graphite fossil coke is characterized by a distinct acicular shape and is more homogeneous compared to ordinary non-graphite petroleum coke. It has a more orderly crystal structure, and the carbon atoms are arranged in a layered formation with weak interlayer pressure. The aluminum smelting sector uses it as a feedstock because of its excellent performance when producing anodes and electrodes made from graphite. It is also used as a raw material for other carbon additives and in the production of silicon carbide and vanadium metal.
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