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Graphitization can be observed in various contexts. For example, it occurs naturally during the formation of certain types of coal or graphite in the Earth's crust.It can also be artificially induced during the manufacture of specific carbon materials, such as graphite electrodes used in fuel cells, nuclear reactors or metallurgical applications.
The most common way of recycling graphite occurs when synthetic graphite electrodes are either manufactured and pieces are cut off or lathe turnings are discarded for reuse, or the electrode (or other materials) are used all the way down to the electrode holder. A new electrode replaces the old one, but a sizeable piece of the old electrode ...
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]
A carbon-paste electrode (CPE) is made from a mixture of conducting graphite powder and a pasting liquid. [1] These electrodes are simple to make and offer an easily renewable surface for electron exchange. Carbon paste electrodes belong to a special group of heterogeneous carbon electrodes.
An electric current is passed through the graphite rods which heats the mixture to 1700–2500 °C. [1] The result of the carbothermic reaction is a layer of silicon carbide (especially in its alpha and beta phases) [ 1 ] forming around the rod and emission of carbon monoxide (CO).
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