Calcined Petroleum Coke (CPC) is a carbon raiser used to set and correct carbon content in molten iron and steel. Calcination drives off volatiles and orders the carbon structure, yielding a dense material with ≥ 98.5% fixed carbon, ≤ 0.5% S, ≤ 0.5% ash and ≤ 0.7% V.M. Dissolved in the melt, that carbon raises the C level and feeds graphite nucleation, which governs strength and machinability in cast iron. Foundries pouring grey and ductile iron use it for carbon adjustment heat after heat, and EAF mills recarburize the charge and run it as part of slag-foaming carbon practice. Typical additions run roughly 0.5-2.0 wt% in cast iron, with charge-level dosing in steelmaking, tuned to bath temperature and target C. The 1-5 mm sizing supports steady dissolution and high recovery with low fume. Low sulphur protects nodularity in ductile grades and limits desulphurization load. Each lot ships with COA. Multi-regional sourcing supports CIF Marmara delivery and Gebze bonded stock, 20 MT FCL. Send your grade and tonnage for an RFQ.
Technische Spezifikationen
F.C
≥ 98.5%
S
≤ 0.5%
Asche
≤ 0.5%
V.M
≤ 0.7%
Feuchte
≤ 0.5%
Körnung
1-5mm
Anwendungen
Cast iron carburization
Grey & ductile iron
EAF steelmaking
Carbon adjustment
Häufig gestellte Fragen
How do I select the right CPC grade for my furnace and iron grade?
Match fixed carbon and sulphur to your melt. This grade runs F.C ≥ 98.5%, S ≤ 0.5%, ash ≤ 0.5%, V.M ≤ 0.7%. For ductile iron and low-sulphur EAF heats, keep S as low as possible to protect Mg recovery and nodularity. The 1-5mm sizing suits ladle and furnace addition with steady dissolution. Specify your target carbon pickup and base sulphur so the F.C/S balance fits your charge chemistry.
What dosage and addition method should I use?
Dosage depends on the carbon gap between charge and target. As a working range, each 0.1% carbon raise needs roughly 1-1.5 kg per tonne at typical recovery, so most foundries add a few kg per tonne. Charge with the metallic burden or add early on the bath for full dissolution; avoid late ladle additions that limit dissolution time. Recovery rises with bath agitation, adequate superheat and avoiding slag entrapment. Run a heat trial to fix your own factor before scaling.
How is it packaged, and what are typical lead time and MOQ?
Standard packaging is 25 kg PP bags or jumbo bags (around 1,000 kg), palletised and shrink-wrapped against moisture. We ship 20 MT FCL or 5 MT LCL via multi-regional sourcing, with bonded stock at Gebze for faster Marmara-region pickup. Lead time runs from prompt for stocked sizing to a few weeks for full-container production lots. Tell us the size cut, bag format and destination Incoterm (CIF Marmara, EXW bonded) for a firm schedule.
What quality documentation and testing come with each lot?
Each lot ships with a COA stating F.C, S, ash, V.M, moisture and sizing against this specification. Fixed carbon is by proximate analysis, sulphur typically by combustion (LECO-type) per ASTM methods. Accredited third-party inspection at load port is available on request. Provide your acceptance limits and we will align the test report and, where needed, pre-shipment sampling so your incoming inspection clears without requalification.
Can CPC substitute for graphitized petroleum coke or other carbon raisers?
CPC and GPC differ mainly in degree of graphitization. CPC at ≥ 98.5% F.C gives reliable, lower-cost carbon pickup for grey iron, general ductile iron and EAF charge. Graphitized petroleum coke (GPC) dissolves faster with higher recovery and ultra-low nitrogen, favoured for premium ductile iron and steel where N control matters. Anthracite-based raisers cost less but carry more ash and sulphur. Match grade to your nitrogen and sulphur limits rather than F.C alone.
