인조 흑연이 만들어지는 방법

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인조흑연을 생산하려면 석유코크스를 열처리해야 합니다.. 이 유형의 제품은 내화물에 사용됩니다., 철강 생산, 윤활유, and electrodes for electrochemical cells.

There are several types of artificial graphite. The most common is called the “Acheson process” and is used to make graphite. It is based on the teachings of E.G. Acheson and has been modified since 1896.

Another method to manufacture artificial graphite is by extrusion. It is performed at a pressure of seven MPa. 이 방법에서는, the binder pitch solidifies and the resulting material is then cooled. The binder usually consists of coal tar pitch or petroleum pitch.

Several additives are added during the manufacturing process. These additives have important roles in determining the quality of bulk graphite products. Some additives include wax, fatty acids, and iron compounds. They are used to reduce defects and prevent the rapid expansion of the coke.

In addition to using the Acheson method, synthetic graphite can also be produced by carbonization. Carbonization is a chemical reaction in which bulk graphite is heated in an inactive atmosphere. Complex dehydrogenation reactions take place at the same time.

Depending on the raw material and the temperature of the heat treatment, the degree of graphitisation can vary. 일반적으로, industrially produced artificial graphite has a degree of graphitisation less than 90%.

Graphite has anisotropy. Natural flake graphite is a single crystal, whereas artificial graphite has a hexagonal basal plane structure. During the manufacturing process, the crystals can be anisotropic or isotropic.

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