Calcined anthracite carbon raiser (CAC) is a thermally treated anthracite recarburizer that raises the carbon level of molten iron and steel. Calcination drives off volatiles and orders the carbon structure, so fixed carbon dissolves into the melt and lifts final C toward target chemistry without the cost of graphitized grades. With F.C 90-95% and a graphite-poor structure, recovery sits below synthetic graphite — which is precisely why it serves as an economical bulk carbon tier where premium pickup is not required. Typical use: grey and ductile iron carburization, casting recarburization, and EAF charge carbon for construction steel, dosed roughly 0.5-2.0 wt% depending on charge carbon deficit and target grade. The spec set supports controlled, low-residual additions: S ≤ 0.3% protects nodularity, Ash ≤ 4%, V.M ≤ 1.0%, Moisture ≤ 1.0%, N ≤ 300 ppm to limit pinholing, sized 1-5 mm for steady dissolution. Supplied with COA and MTC, multi-regional sourcing, ex Gebze bonded stock or CIF Marmara, 20 MT FCL. Send target chemistry and tonnage for an RFQ.
Specifiche tecniche
F.C
90-95%
S
≤ 0.3%
Ceneri
≤ 4%
V.M
≤ 1.0%
Umidità
≤ 1.0%
N
≤ 300 ppm
Granulometria
1-5mm
Applicazioni
Grey & ductile iron carburization
EAF charge carbon
Casting recarburization
Construction steel
Domande frequenti
How do I select the right calcined anthracite grade for my melt?
Match fixed carbon to your tolerance for ash and nitrogen. This grade runs F.C 90-95%, S ≤0.3%, Ash ≤4%, V.M ≤1.0% and N ≤300 ppm at 1-5mm. For grey and ductile iron carburization and casting recarburization, the low S and controlled N suit economical carbon pickup. Where you need tighter N or higher purity, step up to a graphitized recarburizer instead. Confirm the COA element band against your final-analysis target before ordering.
What dosage and addition practice should I use?
Dosage depends on your carbon gap, base charge and target spec, not a fixed rate. As a working range, recarburizers are typically added at roughly 0.3-2.0 wt% of charge for cast iron, with the upper end for low-carbon scrap melts. The 1-5mm size aids dissolution; add onto the charge or into the stream for good recovery, avoid late surface dumps. Recovery commonly sits near 80-90% in EAF/induction practice. Run a trial heat and adjust to your actual recovery.
What are the packaging, MOQ and lead-time options?
Standard packing is 25 kg bags or 1,000 kg jumbo bags, palletized and shrink-wrapped for container loading. Bulk moves as 20 MT FCL; smaller trials ship 5 MT LCL. We hold Gebze bonded stock for fast Marmara-region pickup and quote CIF Marmara on import lots. Lead time depends on whether material draws from local stock or an inbound lot. Send your tonnage, size and delivery point and we confirm packing and timing per order.
What quality documentation and testing come with the material?
Each lot ships with a COA reporting fixed carbon, sulphur, ash, volatile matter, moisture, nitrogen and size against this grade band. Fixed carbon and ash follow standard proximate analysis; sulphur is determined by combustion. Third-party testing at a recognized lab can be arranged on request, and pre-shipment samples are available for qualification. Specify any in-house acceptance limits or sampling protocol with your order so the documentation matches your incoming-inspection routine.
What can I substitute if this grade does not fit?
For higher carbon yield and lower nitrogen, a graphitized petroleum-coke recarburizer is the usual step up, at higher cost. Where nitrogen pickup must stay minimal in ductile iron, prioritize low-N grades. Calcined petroleum coke offers another mid-tier option. For EAF charge carbon where economics lead, this calcined anthracite is the cost-efficient choice. Share your target final C, N ceiling and budget and we map the closest grade from multi-regional sourcing.
