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Precursors that produce graphitizing carbon include polyvinyl chloride (PVC) and petroleum coke. Polyvinylidene chloride (PVDC) and sucrose produce non-graphitizing carbon. Physical properties of the two classes of carbons are quite different. Graphitizing carbons are soft and non-porous, while non-graphitizing carbons are hard, low density ...
They are made from petroleum coke after it is mixed with coal tar pitch. They are extruded and shaped, then baked to carbonize the binder (pitch). This is finally graphitized by heating it to temperatures approaching 3,000 °C (5,430 °F), at which the carbon atoms arrange into graphite.
In 2010, GrafTech acquired two companies: Seadrift Coke LP, a manufacturer of petroleum coke, which is an essential component in the production of graphite electrodes; and C/G Electrodes LLC, which manufactures graphite electrodes. [5] In March 2011, the company acquired Micron Research Corporation, a manufacturer of superfine-grained graphite. [6]
The company produces coke from virtually all types of coal suitable for coking. Coal is sourced from OKD mines as well as from abroad. OKK Koksovny, a. s. is the largest European producer of foundry coke. The firm offers a broad assortment of coke types for foundry and metallurgical manufacturing, for special metallurgy, heating and other purposes.
Calcined petroleum coke (CPC) is the product from calcining petroleum coke. This coke is the product of the coker unit in a crude oil refinery . The calcined petroleum coke is used to make anodes for the aluminium , steel and titanium smelting industry and as the feed stock for the production of synthetic graphite.
Gas emission. Coke oven interior: detail (1942, USA). The coke oven is the central element of a coking plant. Horizontal ovens, which are the most commonly used (they are suitable for monitoring the various extraction stages), take the form of narrow compartments (approx. 50 cm wide), but several meters high and several meters deep.
For manufacturing of the graphitized anodes, anthracite and petroleum coke are calcined and classified. They are then mixed with coal-tar pitch and pressed. The pressed green anode is then baked at 1200 °C and graphitized. Coke anodes are made of calcined petroleum coke, recycled anode butts, and coal-tar pitch (binder).
Raw coke. Coke is a grey, hard, and porous coal-based fuel with a high carbon content. It is made by heating coal or petroleum in the absence of air. Coke is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges.