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Production of the GPC ( Full Graphitized Petroleum Coke and Semi- Graphitized Petroleum coke )
After high-temperature "magic" treatment at 1800 ℃ -3000℃, the internal carbon atoms of graphitized petroleum coke transform from disordered to neatly arranged graphite structures - this is the birth process of graphitic petroleum coke carbonization agents.
Its core characteristics are high carbon, low sulfur, and low nitrogen. Far superior to ordinary calcined petroleum coke. This "refined" carburetor can not only supplement carbon efficiently, but also reduce defects such as porosity and slag inclusion in castings, which can be called the "golden supporting role" of the casting industry
Color and Gloss: Graphitic petroleum coke carbonization agents typically appear gray black or black in color, with a stronger metallic luster and a shiny black appearance. The enhancement of this luster is due to the more ordered arrangement of carbon atoms during the graphitization process. Formed a more compact structure.
Structure and texture: Graphitized petroleum coke carbonization agent has a porous structure, which helps to improve its specific surface area and reactivity, thus better exerting its carbonization effect in steelmaking and casting processes. Meanwhile, it usually has a certain degree of hardness and brittleness, and is not easily broken or deformed.
The difference between full graphitization and semi graphitization Petroleum Coke (GPC )
1. Differences in crystal structure
The fully graphitized petroleum coke carbonization agent(Carbon raiser) undergoes high-temperature treatment above 2500-3000 ℃, resulting in a completely ordered layered arrangement of carbon atoms and a graphitization degree of ≥ 95%
The semi-graphitized ( Petroleum coke) carbon additive only needs to be treated at 1800-2500 ℃, with a graphitization degree of 60% -80% and retaining some disordered structure.
2.Comparison of Key Performance Parameters
Items |
Fully Graphitized Petroleum coke |
Semi Graphitized Petroleum Coke |
Fixed carbon Content |
≥ 98% |
90-96% |
Sulfur Content |
≤0.05% |
0.1-0.3% |
Nitrogen Content |
≤200ppm |
300-500ppm |
Absorption Ratio |
≥90% |
70-85% |
Features & Advantages
1. Improve casting performance and upgrade quality
The graphitized structure makes carbon more easily absorbed by molten iron, with an absorption rate of over 90%. It can refine the graphite morphology, enhance the tensile strength and hardness of castings, especially suitable for high-end products such as ductile iron and vermicular iron.
2. Reduce porosity defects and increase yield!
Ordinary carburizers have high sulfur and nitrogen content, which can easily cause porosity. The graphitization process can remove most impurities and control sulfur below 0.05%. Extremely low nitrogen content, reducing the risk of nitrogen porosity in castings from the source
3. Environmental protection, energy conservation, and green production
The low ash content characteristic (≤ 0.5%) reduces slag generation, lowers energy consumption and slag removal intensity, while reducing smoke and dust emissions, which is in line with environmental trends.
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