Graphitized Petroleum Coke(GPC) is a vital component of steelmaking, providing the optimal content of carbon required during smelting process to ensure final steel products that are strong and durable. GPC is also a good way to reduce impurities and increase thermal conductivity.
GPC, as opposed to conventional calcined oil coke (CPC), can be created by further processing petcoke through a unique and proprietary pyrolysis procedure. This involves heating the material at extremely high temperature in a nonoxidizing environment. This process causes the carbon to rearrange itself into a well organized graphite crystallization known as "graphitization". GPC's superior properties allow it to be used in many different applications.
The global market for graphite and coal based materials is moderately concentrated with several key producers maintaining significant share by leveraging their vertical integration and specialized product development capabilities. They are able offer high-purity, specialty grades at premium prices while still remaining cost-competitive in traditional uses such as precision casting and steel smelting. They are also developing advanced products such as Lithium Battery Grade graphite coke for use in energy storage systems and electric vehicles.
Low Sulfur Graphite Petroleum Coke used in steel production is one of the best types of petcoke. It can be used as a carbon raiser. It has a low sulfur content, is highly conductive, and exhibits superior chemical resistance and thermal expansion. Low sulfur GPC is a good choice for electric-arc furnaces requiring ultra-high-power graphite electrodes. It is used in a range of aluminum melting processes.
Raw petcoke, also known as crude oil, is produced by heating crude through atmospheric distillation. The result is a solid brown-black fuel that contains low levels of nitrogen and hydrogen, as well vanadium and sulfur. Petcoke can have different morphologies depending on the processing method.
CPC is a type of petroleum coke that is obtained by baking raw petcoke to remove volatiles and moisture. This process increases its carbon content to make it useful in a number of steel manufacturing and aluminum smelting industries. It is also commonly employed as an alternative to pig iron in many steel-making processes, improving the strength, durability and quality of the final steel products.
GPC has a low sulfur content, and its high conductivity makes it an ideal raw material to produce graphite electrodes. These are then used as a fuel in electric arc ovens to create aluminium. It can also be used as an reagent for the production of lithium-ion batteries.
The particle size and sizing of GPC are critical factors in its performance as an anode for Li-ion battery. The finer GPC particle size allows for a larger surface area and improved contact with electrolyte. The more uniform morphology also prevents large particles that can cause short circuiting. Moreover, the smaller particle sizes of GPC facilitate greater graphitization and faster passivation during lithiation and relithiation cycles. This enables a much longer service life than conventional anode materials. This is particularly important in lithium-ion battery with a capacity over 400mAh/g or beyond.
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