Premium Carbon Raiser

Recarburant, also known as Carbon Raiser, Recarburizer, or Graphite Petroleum Coke (GPC), is a crucial additive in the steelmaking and foundry industries. It is widely used to increase carbon content, improve metallurgical quality, and reduce production costs in cast iron, ductile iron, and steel production.
Made from high-quality petroleum coke and calcined at high temperatures, GPC offers low sulfur, high fixed carbon, and excellent absorption rates.

Fixed Carbon (F.C): 98% min / 95% min / 90% min

Sulfur (S): 0.05% max / 0.3% max

Ash: 0.5–4.0%

Volatile Matter: 0.5–1.5%

Moisture: 0.5% max

Size: 1–5 mm, 1–10 mm, or customized

Custom grades and sizes are available based on specific requirements.

While low-grade carbon raisers may seem cheaper, they often come with hidden costs:

Poor absorption rate → higher consumption, wasting resources.

High sulfur/impurities → leads to defects in steel or castings.

Inconsistent quality → causes production instability and rework.

Increased energy usage → due to repeated adjustments in the furnace.
In the long run, cheap quality means higher overall costs.

For bulk orders, our typical lead time is 7–15 days after confirming the order.

Standard grades: ready stock for fast dispatch.

Large volumes: delivery schedule coordinated with customers' production timelines.

Export orders: flexible shipping options, CIF or FOB, from major Chinese ports.

A reliable recarburant should have:

High Fixed Carbon (≥98%) for maximum efficiency.

Low Sulfur (<0.05%) to avoid brittleness and cracks.

High Absorption Rate ensuring better carbon recovery.

Consistent Granulometry for stable furnace operations.

Low Ash and Volatile Content to minimize impurities.

Background
ArcelorMittal Ghent, a leading flat carbon steel producer in Belgium, faced increasing pressure to improve steel refining efficiency while reducing production costs. Their existing calcined petroleum coke (CPC) raiser caused inconsistent carbon recovery, high ash residues, and extended cycle times. They needed a reliable, high-performance solution.

Challenge
The plant's conventional carbon raiser led to:

Carbon recovery fluctuating between 75–82%, forcing frequent recarburization.

High sulfur and nitrogen pick-up, degrading steel quality.

Excessive slag formation, increasing refractory wear and cleaning downtime.

Solution
After benchmarking, the plant switched to Premium Carbon Raiser (PCR) - a high-purity, graphitic carbon produced from thermally purified petroleum coke. PCR offered:

Fixed carbon: 98.5% min.

Sulfur: ≤0.05%

Nitrogen: ≤200 ppm

Moisture: ≤0.5%

Controlled particle size (0.5–5 mm) for rapid dissolution.

Implementation
A three-month trial was conducted on the 160-ton electric arc furnace (EAF) – ladle furnace (LF) route. PCR was added during tapping at 0.6 kg per ton of liquid steel, replacing CPC at the same dosage rate. No equipment changes were required.

Results

Carbon recovery increased to 92–94% consistently, reducing raiser consumption by 15%.

Cycle time shortened by 4 minutes per heat due to faster dissolution and fewer re-dos.

Steel cleanliness improved: average sulfur content in low-alloy grades dropped from 0.022% to 0.009%; nitrogen decreased by 18%.

Refractory life in the ladle extended by 12%, lowering maintenance costs.

Total annual savings: €310,000 (material + energy + labor), with a payback period of 2 months.

Conclusion
Premium Carbon Raiser delivered measurable quality and economic gains at ArcelorMittal Ghent. Its high purity and graphitic structure enabled faster, cleaner carburization, proving that premium products can reduce total manufacturing cost while enhancing metallurgical performance.

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