Carbon Raiser

Carbon Raiser Manufacturer for Steelmaking & Foundry Applications

Trusted Carbon Raiser Manufacturer supplying GPC, CPC, CAC and Synthetic Graphite with stable quality, customized specifications, and reliable global delivery.

Low Sulfur Carbon Raiser

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Coal Carbon Raiser

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Calcined Petroleum Coke

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Graphite Carbon Raiser

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Quick Specifications

Parameter / Feature	Technical Specification Range
Product Types	Graphitized Petroleum Coke (GPC), Calcined Petroleum Coke (CPC), Calcined Anthracite Coal (CAC)
Fixed Carbon (FC)	90.0% Min – 99.0% Min (Depending on Grade)
Sulfur Content (S)	Ultra-Low S (0.03%–0.05% Max) to Standard S (0.2%–0.5% Max)
Nitrogen Content (N)	Ultra-Low N (≤100–300 ppm) for GPC
Ash & Volatile Matter	Ash: 0.5% Max (GPC) – 6.0% Max (CAC)
Carbon Absorption Rate	85% – 95% (Significantly reduces consumption per melt heat)
Standard Grain Sizes	1–5 mm, 0.5–5 mm, 1–3 mm, 3–8 mm, 0–1 mm (Custom screening available)

Carbon Raiser Product Categories

Graphitized Petroleum Coke (GPC)

High-purity carbon raiser produced through high-temperature graphitization, offering excellent carbon recovery, low sulfur, and low nitrogen performance.

Recommended For:
Ductile iron casting
Grey iron foundries
Premium alloy steel production

Typical Specifications:
FC 98.5%–99.0% | S ≤0.03%–0.05% | N ≤100–300 ppm

Calcined Petroleum Coke (CPC)

A cost-effective carbon additive produced through calcination of petroleum coke, providing stable carbon content and good dissolution performance.

Recommended For:
EAF steelmaking
Ladle refining
General foundry applications

Typical Specifications:
FC 98.0%–98.5% | S 0.3%–0.5% | Ash ≤0.8%

Calcined Anthracite (CAC)

An economical carbon source with reliable supply and stable performance for large-volume metallurgical applications.

Recommended For:
Steel mills
Carbon adjustment
Slag foaming applications

Typical Specifications:
FC 90.0%–95.0% | S 0.2%–0.3% | Ash 4.0%–6.0%

Synthetic Graphite Granules & Powders

High-purity graphite materials with excellent conductivity and fast absorption performance for precision applications.

Recommended For:
Special metallurgy
Friction materials
Powder metallurgy

Typical Specifications:
FC 98.0%–99.0% | S ≤0.05% | Customized particle sizes available

Which Carbon Raiser Is Right for Your Process?

Application	Recommended Product	Key Requirements	Benefits
Ductile Iron Casting	Graphitized Petroleum Coke (GPC)	Low sulfur, low nitrogen, high carbon recovery	Improves nodularity and reduces porosity risk
Grey Iron Foundry	GPC / Low-S CPC	Stable carbon absorption, controlled sulfur	Enhances graphite structure and machinability
EAF Steelmaking	CPC / GPC	Fast dissolution, high fixed carbon	Efficient carbon adjustment and slag foaming
Ladle Refining	CPC / GPC	Fine particle size, rapid absorption	Enables accurate carbon control
Large-Scale Steel Production	Calcined Anthracite (CAC)	Cost-effective carbon source	Suitable for high-volume carbon addition
Special Alloy Steel	Low-Nitrogen GPC / Synthetic Graphite	Ultra-low impurities	Meets strict metallurgical requirements

How to Choose the Right Carbon Raiser

Match Your Furnace & Addition Point

Medium-Frequency Induction Furnaces: Add carbon raiser early in the charge along with steel scrap. Use GPC (1–5 mm) to achieve an absorption rate above 90–95% with minimal slag generation.

Ladle / Tapping Addition: For carbon adjustment in the ladle, select smaller particle sizes (1–3 mm) to ensure fast dissolution in molten metal before temperature drops.

Evaluate Impurity Tolerances

Nitrogen Sensitive: High nitrogen causes nitrogen fissures and pinholes in thick-walled castings. Choose GPC (N ≤ 100–300 ppm).

Sulfur Sensitive: Excess sulfur degrades ductile iron nodularity and damages furnace linings. Choose GPC or Low-S CPC.

Performance Comparison Table

Property / Feature	Graphitized Petroleum Coke (GPC)	Calcined Petroleum Coke (CPC)	Calcined Anthracite (CAC)	Synthetic Graphite Granules
Fixed Carbon (FC)	98.5% – 99.0%	98.0% – 98.5%	90.0% – 95.0%	98.0% – 99.0%
Sulfur (S)	0.03% – 0.05% Max	0.3% – 0.5% Max	0.2% – 0.3% Max	0.05% Max
Nitrogen (N)	< 100 – 300 ppm	< 1,000 ppm	> 1,500 ppm	< 300 ppm
Ash Content	< 0.5% Max	< 0.8% Max	4.0% – 6.0% Max	< 0.5% Max
Volatile Matter	< 0.5% Max	< 0.8% Max	< 1.5% Max	< 0.5% Max
Absorption Rate	90% – 95%	80% – 85%	65% – 75%	85% – 90%
Dissolution Speed	Very Fast	Fast	Moderate	Fast
Primary Industry	Ductile Iron & Special Steel	EAF Steelmaking & Grey Iron	Basic Steelmaking & Slag Foaming	Friction & Castings

Manufacturing Capability

Controlled Production Process

We select premium petroleum coke and anthracite, controlling key indicators such as fixed carbon, sulfur, and ash.

Advanced Processing & Size Control

With advanced crushing and screening systems, we provide stable particle sizes from fine powder to granules for different furnace applications.

Strict Quality Management

Each batch is tested for fixed carbon, sulfur, nitrogen, ash, moisture, and particle size. A complete COA is provided for quality assurance.

Flexible Supply & Customization

We offer customized solutions for composition, particle size, packaging, and labeling, ensuring reliable global supply.

Quality Control & Testing

01.

In-House Testing Equipment

Our ISO-compliant laboratory utilizes High-Frequency Infrared Carbon-Sulfur Analyzers, Proximate Analyzers (Ash/Volatiles), and Laser Particle Size Analyzers.

02.

Heat-Wise Sampling & COA

Every lot is sampled in accordance with ISO 562 and ISO 1171 standards. A comprehensive Certificate of Analysis (COA) is provided with every bill of lading.

03.

Magnetic & Moisture Testing

100% of material passes through inline magnetic separators to guarantee zero metallic contamination and moisture content ＜0.5%.

04.

Independent Third-Party Verification

We support pre-shipment sampling and testing at port by independent international inspection bodies including SGS, AHK, Bureau Veritas (BV), or CCIC.

Packaging & Shipping

Packaging Configurations

1.0 MT / 1.25 MT Big Bags (FIBC): Weatherproof, UV-stabilized woven bags with an internal heavy-duty PE film liner.

25 kg Small Bags + Jumbo Outer Bag: 25 kg paper or PE bags stacked on wooden pallets and shrink-wrapped for easy handling in smaller melt shops.

Bottom-Discharge Bags: Built-in discharge spouts at the bag base enable direct hopper or furnace charging with minimal dust release.

Logistics & Global Shipping

Container Freight (FCL): 20–26 MT net weight loaded per 20’ Heavy Duty Container.

Breakbulk Cargo: Available for large volume steel mill deliveries (1,000 MT+).

Trade Terms: Support for FOB, CFR, CIF, DDP, and DAP terms with full REACH and customs support documentation.

Frequently Asked Questions

Q: What is a carbon raiser used for?

A: Carbon raiser is a carbon additive used to increase carbon content in molten metal during steelmaking and iron casting. It is commonly applied in induction furnaces, electric arc furnaces (EAF), ladle refining, and foundry operations to achieve accurate carbon adjustment.

Q: What is the difference between GPC and CPC carbon raiser?

A: Graphitized Petroleum Coke (GPC) offers higher carbon purity, lower sulfur, and lower nitrogen, making it suitable for ductile iron and high-quality steel applications. Calcined Petroleum Coke (CPC) provides a cost-effective solution for general steelmaking and foundry applications with stable carbon recovery.

Q: Which carbon raiser is best for ductile iron casting?

A: Graphitized Petroleum Coke (GPC) is generally preferred for ductile iron casting because of its high fixed carbon content, low sulfur, and low nitrogen characteristics. It helps improve graphite nodule formation and reduce defects caused by impurities.

Q: How do I choose the right carbon raiser particle size?

A: Particle size selection depends on the furnace type and addition method. For induction furnaces, 1–5 mm or 1–3 mm sizes are commonly used due to their good balance between dissolution speed and carbon recovery. Smaller particles may increase oxidation loss, while oversized particles dissolve slower.

Q: What is the carbon recovery rate of your carbon raiser?

A: Carbon recovery depends on furnace conditions, addition method, temperature, and material grade. Our GPC products typically achieve high carbon recovery due to high graphitization degree, controlled particle size, and low impurity levels.

Q: Why is sulfur content important in carbon raiser?

A: Sulfur control is critical in applications such as ductile iron production. Excess sulfur can affect graphite morphology and reduce the effectiveness of nodulizing treatments. Low-sulfur GPC is recommended for sulfur-sensitive applications.

Q: Can carbon raiser be used in electric arc furnace (EAF) steelmaking?

A: Yes. CPC and GPC are widely used in EAF steelmaking for carbon adjustment. Their high fixed carbon content and good dissolution performance help achieve target carbon levels efficiently.

Q: Do you provide customized carbon raiser specifications?

A: Yes. We can customize fixed carbon content, sulfur level, nitrogen content, particle size, and packaging according to different steelmaking and foundry requirements.

Q: What quality tests are performed before shipment?

A: Each batch is tested for fixed carbon, sulfur, nitrogen, ash, moisture, and particle size distribution. A Certificate of Analysis (COA) is provided with every shipment to ensure quality transparency.

Q: Do you provide carbon raiser samples for testing?

A: Yes. Trial samples are available for laboratory analysis and furnace testing. Customers can evaluate chemical composition and carbon recovery performance before bulk orders.

Q: What is the typical lead time for carbon raiser orders?

A: Standard grades are usually available for shipment within a short production cycle. Customized grades or special particle sizes may require additional processing time depending on specifications and order quantity.

Q: Do you support global export and REACH compliance?

A: Yes. We provide export documentation support and can assist customers with international shipping requirements, including REACH-related compliance documentation for European markets.

As one of the most professional carbon raiser manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy bulk carbon raiser in stock here and get quotation from our factory. We also accept customized orders.