Graphite Petroleum Coke (GPC)
Graphite Petroleum Coke
In ductile iron and precision casting routes, sulfur and nitrogen budgets are often the limiting factor on recarburizer choice, because small shifts in sulfur can disturb nodularity while nitrogen contributes to pinhole and subsurface defect risk in sensitive irons. Graphitized petroleum coke (GPC) is the high-purity carbon additive produced when green petroleum coke is graphitized at approximately 2,800–3,000°C in electric resistance furnaces, reorganizing the carbon structure toward ordered graphite and driving heteroatoms to the trace levels premium steelmaking and foundry specifications require. Our product grades illustrate the FC 98.5%+ fixed-carbon envelope that defines GPC relative to calcined anthracite or standard calcined petroleum coke, together with sulfur controlled down to ultra-low levels in the Premium tier (0.03% S in the table) and ≤0.05% S on the standard grade. Those chemistry bands matter in foundry metallurgy where recarburizer sulfur is part of the overall magnesium treatment and inoculation balance, and in precision steelmaking where inclusion and gas porosity limits are tight. Dissolution behavior in liquid iron and steel generally improves versus anthracite-based carbon additives, which is operationally visible in induction furnaces and timed ladle additions. Buyers typically map Semi GPC through Premium grades to the sulfur and fixed-carbon window their process tolerates, treating GPC as a yield and quality instrument rather than a commodity carbon source.
Request Quote
Technical Characteristics & Performance
Key Features
- High fixed carbon content: ≥98.5%
- Low sulfur: ≤0.05%
- Low ash: ≤0.5%
- Low moisture: ≤0.3%
Additional Benefits
- Low volatile matter: ≤0.5%
- High purity: Minimal impurities
- No smoke or odor during use
- Fast absorption and stable effects
Available Particle Sizes
Custom particle size distributions are available — tell us your furnace type and feeding method, and we will recommend the optimal sizing for maximum dissolution rate and carbon recovery.
When to Choose This Product
| Requirement | Recommendation |
|---|---|
| Ductile iron with sulfur-sensitive nodularity | Strong fit |
| Precision casting requiring clean carbon | Strong fit |
| Steel ladle trim addition with low impurity target | Strong fit |
| High FC and low ash target | Strong fit |
| Commodity EAF carbon addition with strict cost ceiling | CAC may be more cost-effective |
Product Specifications
| Type | FC(%) | Ash(%) | VM(%) | S(%) | Moisture(%) |
|---|---|---|---|---|---|
| Semi GPC | 98 | 1 | 1 | 0.3 | 0.5 |
| GPC Standard | 98.5 | 0.7 | 0.8 | 0.05 | 0.5 |
| GPC Premium | 99 | 0.5 | 0.5 | 0.03 | 0.5 |
Particle Size by Feeding Method
Final specification should be confirmed by the latest COA and purchase contract.
| Size | Typical use |
|---|---|
| 0–1 mm | Fine injection, fast dissolution |
| 1–3 mm | Induction furnace standard |
| 3–5 mm | Ladle and bath addition |
| 5–8 mm | Larger melt volume |
| Custom | Confirm with technical team |
Packaging Options
- 25 kg PP bags
- 1 MT jumbo bags (FIBC)
- Pallet wrapping available
- Custom labeling on request
Quality Documents
- COA per shipment
- SDS available on request
- Third-party inspection can be arranged
- For nitrogen-sensitive applications, request latest N data
Product Comparison
Review related grades side by side on their product pages to compare specifications and typical applications.
What to Include in Your Inquiry
Sharing these details helps us respond with an accurate quote and technical match.
- Target FC
- Max sulfur
- Nitrogen requirement (if any)
- Max ash
- Max VM
- Max moisture
- Particle size
- Quantity (MT)
- Destination port
- Application (foundry/steel/other)
Image Gallery
Frequently Asked Questions About Graphite Petroleum Coke
What is Graphitized Petroleum Coke (GPC)?
Why choose GPC over other recarburizers?
What industries use GPC most?
About Panson Carbon
Backed by 34+ Years of Carbon Expertise
When you source carbon from Panson, you are partnering with a manufacturer who has built three decades of metallurgical knowledge into every product specification. Our in-house laboratory, vertically integrated production lines, and dedicated technical sales team exist for one purpose: to ensure the carbon you receive performs exactly as your metallurgists expect.
Learn more about us"Panson's calcined anthracite coal has significantly improved our steel production efficiency. Their consistent quality and reliable supply have made them our go-to partner."
"The carbon additives from Panson have enhanced our cast iron quality remarkably. Their technical support and product range are unmatched in the industry."
Graphite Petroleum Coke Applications
Steel & Iron
Carbon additive for steelmaking restores bath carbon lost to oxidation during melting and refining—EAF heats often see on the order of 0.15–0.25% carbon burn-off per heat from scrap and slag interaction—so operators can hold narrow chemistry bands from charge to tap. In EAF practice, recarburizer and carbon raiser additions are timed with power-on, bath formation, and ladle treatment to match dissolution behavior to tap-to-tap rhythm and energy use. Basic oxygen furnace (BOF) and secondary steelmaking still rely on controlled carbon inputs and trim additions where sulfur, nitrogen, and ash limits define grade acceptance. Silicon carbide can act as a deoxidizer while contributing carbon and silicon, supporting slag–metal balance in demanding heats. CAC, GPC, CPC, Semi Coke, and SiC are selected for fixed carbon, impurities, and sizing that align with bucket, bath, or injection routes.
Foundry
Recarburizer for foundry work must track carbon equivalent (CE), inoculation response, and how quickly carbon dissolves in the melt—especially in coreless and channel induction furnaces where cycle time is tight. For ductile iron, sulfur pickup from a carbon raiser can erode nodularity unless low-sulfur graphite or calcined options are matched to the treatment recipe. Gray iron still benefits from clean, consistent carbon addition to support Type A graphite and fluidity without excess gas-forming residuals. Fine versus coarse sizing changes dissolution time at typical iron melting temperatures (~1,450–1,500 °C), influencing holding time and throughput. CAC, GPC, CPC, Semi Coke, and supporting alloys are chosen to stabilize CE, surface quality, and mechanical properties batch to batch.
Chemical
Silicon carbide is widely used where ceramics see simultaneous heat, corrosive atmospheres, and thermal shock—kiln furniture, setter plates, and furnace hardware operating from roughly 1,200 °C up through the highest practical firing regimes depend on SiC’s thermal shock resistance and hot strength. In fixed- and fluidized-bed units, SiC-based media and supports can stabilize temperature distribution and withstand erosive flow when catalyst carriers must last whole campaigns. Carbothermic and high-temperature reductions also draw on high fixed-carbon materials when a controlled carbon source is part of the chemistry. For carbon electrodes and conductive carbon forms, low ash and consistent real density support electrical and process predictability. Our SiC, CAC, and GPC lines map to refractory structure, reduction chemistry, and conductive carbon needs in chemical and materials plants.
Electrode
Electrode and carbon product manufacturing — including graphite electrodes for EAF steelmaking, aluminum cathode blocks, and conductive carbon pastes — relies on carbon raw materials with consistent physical and chemical properties. GPC provides the graphitized carbon structure needed for electrode-grade applications, CPC offers high real density for anode and cathode uses, and CAC serves as a cost-effective filler in carbon paste formulations.
Interested in Graphite Petroleum Coke?
Request a free sample to validate performance in your own furnace, or speak with our technical team about optimizing your carbon addition practice for better recovery and lower total cost.
Contact Us Now