Calcined Anthracite Coal (CAC)
Calcined Anthracite Coal
When steelmaking and foundry operations melt scrap or charge materials in an electric arc furnace (EAF), ladle metallurgy furnace, or induction line, dissolved carbon must be replenished with a carbon additive whose dissolution and slag impact are predictable from heat to heat. Calcined anthracite coal (CAC) is a standard industrial recarburizer for that duty, and the technical ceiling on performance is set largely before calcination: by the rank, mineral matter, and sulfur burden of the raw anthracite. Our CAC is produced from Taixi anthracite sourced in Ningxia's Helan Mountains, a deposit long associated with comparatively low ash, low sulfur, and low phosphorus—attributes that support high fixed carbon in the finished carbon additive without excessive slag generation. Gas calcination at temperatures exceeding 1,200°C in PLC-controlled furnaces removes volatile matter and residual moisture while preserving a dense carbonaceous matrix suited to practical dissolution kinetics in molten steel and iron. Across the listed grades, fixed carbon is positioned in the FC 90–95% range, which is the band many EAF operators and foundries target when balancing carbon pickup, sulfur input, and cost against premium graphitized alternatives. In application terms, CAC is widely used as a steelmaking and foundry recarburizer where tonnage throughput, repeatability of carbon recovery, and control of slag chemistry matter as much as headline purity.
Production Regions & Raw Materials
The main production areas for calcined coal carbon additive are Ningxia and Inner Mongolia. Notably, Taixi anthracite from Ningxia, with its unique characteristics of low ash, low sulfur, low phosphorus, high fixed carbon content, and high calorific value, is an ideal raw material for producing high-quality carbon additives.
Technical Characteristics & Performance
Key Features
- Easy molten bath introduction
- High carbon solubility rate
- Consistent performance quality
- Adequate homogeneity
Additional Benefits
- High fixed carbon content
- Low ash, volatile matter content
- Low moisture content
- Zero smoke emission
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 |
|---|---|
| EAF or ladle carbon adjustment | Good cost-performance balance |
| Foundry carbon addition with moderate impurity limits | Suitable when low sulfur is required but ultra-low is not mandatory |
| Traders needing volume recarburizer | Strong fit due to broad size and grade options |
| Ultra-low sulfur ductile iron | Consider GPC instead |
| Applications requiring FC 98.5%+ | Consider GPC or CPC |
Product Specifications
| Grade | FC(%) | Ash(%) | VM(%) | S(%) | Moisture(%) |
|---|---|---|---|---|---|
| Super Grade | 95 | 4 | 1 | 0.25 | 0.5 |
| 1st Grade | 94 | 5 | 1 | 0.25 | 0.5 |
| 2nd Grade | 93 | 5.5 | 1.5 | 0.3 | 0.5 |
| 3rd Grade | 92 | 6 | 2 | 0.3 | 1 |
| 4th Grade | 91 | 7 | 2 | 0.35 | 1 |
| 5th Grade | 90 | 8 | 2 | 0.35 | 1 |
Particle Size by Feeding Method
Final specification should be confirmed by the latest COA and purchase contract.
| Size | Typical use |
|---|---|
| 0–1 mm | Injection / fine addition |
| 1–3 mm | Induction furnace, fast dissolution |
| 3–5 mm | Common bath addition |
| 5–8 mm / 5–10 mm | Larger furnace or slower addition |
| 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
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
- Max ash
- Max VM
- Max moisture
- Particle size
- Quantity (MT)
- Destination port
- Packaging preference
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Frequently Asked Questions About Calcined Anthracite Coal
What is Calcined Anthracite Coal (CAC)?
What is the difference between CAC and GPC?
What is Taixi anthracite and why is it special?
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."
Calcined Anthracite Coal 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.
Non-Ferrous Metal
Non-ferrous routes—from Hall–Héroult aluminum cells to secondary copper and specialty alloys—depend on carbon and silicon carbide inputs that respect conductivity, reactivity, and trace impurity envelopes. Anode-grade carbon materials must support stable cell operation and metal quality; deviations in density or impurities can show up as dusting, instability, or off-spec metal. In copper, deoxidizer selection (including SiC-based practice where it fits the flowsheet) ties to oxygen control for conductivity-critical grades. High-temperature melting and refining still use carbon and SiC where chemical reduction, slag control, or exothermic contribution matters. Our portfolio is positioned for these roles with grades and sizing aimed at furnace type and quality targets—not generic “carbon in, metal out” supply.
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.
Ferroalloys
Ferroalloy smelting in submerged arc furnaces (SAF) relies on carbon reductants with controlled sizing, low ash, and predictable reactivity to convert oxide ores into metallic alloys. Semi-coke and calcined anthracite serve as primary reductants for FeSi, SiMn, and silicon metal production, where lump integrity, furnace permeability, and impurity budgets (particularly phosphorus, sulfur, and ash) directly impact alloy grade, energy consumption, and furnace stability.
Interested in Calcined Anthracite Coal?
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.
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