Carbon Raiser Particle Size Guide for EAF & Induction Furnace – Optimize Your Steelmaking Process
Mar 27,2026
In steelmaking, the particle size of carbon raisers significantly impacts the efficiency of carbon absorption, melting speed, and overall furnace performance.
Whether you're using calcined petroleum coke (CPC), artificial graphite, or green petroleum coke (GPC), selecting the right particle size can improve carbon recovery and reduce operational costs.
Why Carbon Raiser Particle Size Matters
The particle size of carbon raisers affects:
Dissolution speed — smaller particles dissolve faster in molten metal, increasing efficiency.
Absorption rate — the right size maximizes carbon uptake in the furnace.
Slag formation — appropriate particle sizes prevent excessive slag, which can slow down the process.
Carbon distribution — uniform distribution ensures stable steel composition.
Ideal Particle Sizes for Different Furnaces
Electric Arc Furnace (EAF)
EAFs generally require faster carbon dissolution for efficient steel production. The best particle sizes for EAF are:
1–5mm — Fast absorption rate, ideal for quick carbon adjustment
1–10mm — Suitable for larger batches and bulk melting
Custom Sizes — Tailored for specific furnace configurations
Induction Furnace
Induction furnaces, which require efficient energy transfer and precise carbon control, benefit from:
- Fine powders (0.5–1mm) — Ensure quick reaction and precise carbon adjustment
- Granular sizes (1–3mm) — Best for larger volumes and stable melting
- Customized sizes — For specific production needs
CPC vs Artificial Graphite – How Particle Size Affects Performance
CPC: Particle size ranges from 1–10mm, ideal for bulk steelmaking and EAF operations. For high-volume applications, this range provides a balance of absorption and cost-efficiency.
Artificial Graphite: Ultra-fine sizes (powder or granules) offer faster dissolution in molten metal, ideal for specialty steel and high-purity applications.
Learn more about CPC specifications → CPC Product Page
Explore high-purity artificial graphite particle sizes → Artificial Graphite Product Page
Common Particle Size Issues
Too large: Slow dissolution, poor carbon absorption, higher slag formation.
Too fine: Can cause excessive carbon loss during melting or lead to operational inefficiencies.
Best Practices for Carbon Raiser Sizing
Always consult with your carbon raiser supplier to customize particle size for your furnace design.
Adjust particle size based on carbon absorption needs and production scale.
Final Thoughts
For optimal furnace performance, choose carbon raisers with particle sizes tailored to your furnace system. Whether using CPC or artificial graphite, proper particle size control is essential for maximizing carbon recovery and minimizing operational costs.
Contact us for customized particle size solutions → Request a Quote
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