Carburizer Carbon additive Calcined anthracite coal, Calcined petroleum coke, Graphite petroleum Coke CAC CPC GPC

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Carbon additive includes calcined petroleum coke, graphite petroleum coke, calcined anthracite coal, electrically calcined anthracite, and natural graphite. We mainly introduce the most commonly used carbon additives.

CAC: Calcined anthracite coal
The raw material of the anthracite recarburizer is anthracite, which went through dry distillation at 1300°C to reduce volatile matter and increase the solid carbon content.

CPC: Calcined petroleum coke
Calcined petroleum coke is the most suitable carbon raiser for steel making. The raw material is raw coke, which contains high impurities and cannot be used as a carbon additive. The carbon additive is obtained after high-temperature calcination of petroleum coke. After the petroleum coke is calcined at a high temperature of 1200-1400℃, most of the moisture, volatiles and other impurities are removed. The carbon content is as high as 98.5%. The carbon additive is irregularly shaped carbon particles with metallic lustre and more transparent carbon particle pores. The high quality of calcined petroleum coke is mainly dependent on the low content of sulfur, which finally affects the quality of steel.

GPC: Graphite petroleum Coke
The raw material of graphite carbon additive is also green coke, but the calcination temperature ratio is 3000. The degree of carbon fixation is high, and the content of S, N, and P is much lower than that of coal. Graphite carbon additive is mainly used for ductile iron with quick absorption, high carbon, and low sulfur.

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