4-7mm Fully Graphitized Petroleum Coke

4–7mm Fully Graphitized Petroleum Coke (GPC) is a high-end carbon material produced by subjecting high-quality calcined petroleum coke to an ultra-high-temperature graphitization process (2,800°C–3,200°C). It serves as a core functional raw material for the metallurgy, foundry, and new energy industries. The product is precision-screened to a standard particle size range of 4–7 mm, classifying it as a medium-sized, uniform graphitized petroleum coke.

Through ultra-high-temperature graphitization, the raw material's amorphous, disordered carbon structure is fully transformed into an ordered hexagonal layered graphite crystal structure. This eliminates the drawbacks associated with ordinary petroleum coke and calcined coke-such as loose structure, low purity, and high loss rates. The product features high fixed carbon content, low levels of sulfur, ash, and volatiles, high electrical and thermal conductivity, and structural stability. With uniform particle size, excellent flowability, and controllable dissolution rates, it is suitable for precision industrial applications requiring recarburization, electrical conductivity, or thermal conductivity. It represents a high-end upgrade over traditional carbon materials and is widely used in premium steelmaking, casting, and electrochemical industries.

Product Advantages

• 1. Ultra-high purity and minimal impurities

Purified via ultra-high-temperature graphitization (approx. 3,000°C), the product achieves a fixed carbon content of over 98.5%–99%. Ash and volatile matter levels are extremely low, and harmful impurities such as sulfur and nitrogen are significantly reduced. This effectively prevents product quality defects caused by impurity contamination during metallurgical and production processes, meeting the demands of high-end manufacturing.

• 2. Complete graphitization and stable performance

Carbon molecules are fully transformed into an ordered hexagonal graphite crystal structure, resulting in high crystal density and chemical stability. The material exhibits excellent resistance to high temperatures, oxidation, and corrosion; it resists decomposition and loss under high-temperature conditions, offering a service life far superior to that of ordinary calcined coke or semi-graphitized petroleum coke.

• 3. Precise particle size and high versatility

Customized with a medium particle size of 4–7 mm, the product features uniform granulation-free of fine powder or oversized lumps-ensuring excellent material flowability. It allows for convenient feeding without clogging, offers a controllable dissolution rate, and ensures stable carburization efficiency. This enables precise control over production formulas, effectively increasing the product yield rate.

• 4. Excellent electrical and thermal conductivity

Its intact graphite crystal structure imparts extremely low electrical resistivity and high electrical and thermal conductivity coefficients. Far surpassing ordinary carbon materials in conductivity, it effectively reduces industrial energy consumption and enhances efficiency in electrothermal and electrochemical production processes.

• 5. Low loss and high cost-performance ratio

With a dense structure and minimal high-temperature loss, the product achieves a carbon absorption rate exceeding 92%. Compared to traditional carburizers, it requires lower dosage while delivering more stable carburization results. It effectively lowers raw material costs and energy consumption, offering outstanding overall cost-effectiveness.

Application Areas

• 1. Iron and steel metallurgy industry (Core application)

Used as a high-end steelmaking carburizer for precise carbon adjustment during refining furnace and ladle refining processes; suitable for the production of carbon steel, alloy steel, stainless steel, and high-end specialty steels. The product offers high carbon recovery and stable composition, enabling precise control of molten steel carbon content. It enhances steel strength, toughness, and uniformity, improves the microstructure, and eliminates quality issues caused by carbon content fluctuations.

• 2. Foundry industry

Used in the production of ductile iron, gray iron, and high-end precision castings. Acting as both a graphite inoculant and a carburizer, it accelerates graphite nucleation and refines grain size. It improves casting toughness, wear resistance, and density while reducing defects such as porosity, shrinkage cavities, and cracks, thereby significantly boosting the pass rate and quality of precision castings.

• 3. Refractory Materials and Carbon Products Industry

It serves as an auxiliary raw material for high-end refractories, graphite products, and carbon electrodes, enhancing properties such as high-temperature resistance, erosion resistance, and electrical and thermal conductivity; it is suitable for demanding applications such as high-temperature kilns and industrial furnace linings.

• 4. Other Industrial Sectors

It is compatible with operational environments involving non-ferrous metal smelting, anti-corrosion applications in the chemical industry, and high-temperature thermal insulation. Thanks to its high stability and purity, it meets the demand for carbon raw materials in various types of high-end, precision industrial manufacturing.

Packing Details:

25kg small bags into one jumbo bag or 1mt jumbo bag or according to customers' requirements

Port: Tianjin Port, Qingdao Port

Leading Time: Shipped in 15-30 days after payment

1. We prefer payment through T/T, L/C, D/P; Western Union and Paypal are also workable.

2. By courier, like DHL, UPS, Fedex. That is door to door, usually, 5-7 days to arrive.

By air transport, usually, 3-4 days to arrive.

By sea transport, usually, 15-30 days to arrive.

If your delivery time is urgent, we recommend you choose express or air freight. This applies to samples or small batches of goods.

If your delivery time is not very urgent, we recommend you choose sea transportation, it is very cheap.