Products Description
Silicon Carbon Alloy, also referred to as Si-C alloy, is a composite ferroalloy primarily composed of silicon (Si) and carbon (C). It is an innovative metallurgical material developed to partially or completely replace traditional ferroalloys such as ferrosilicon, silicon carbide, and recarburizer in steelmaking and foundry applications.
The alloy is produced by smelting silica (SiO₂) and carbon-rich materials (like coke or coal) in an electric arc furnace at high temperatures. The result is a cost-effective, multi-functional alloy that enhances efficiency, reduces costs, and improves end-product quality.
Main Function of Silicon Carbon
Silicon Carbon Alloy serves several critical roles in metallurgical processes:
Deoxidizer
- Silicon reacts with dissolved oxygen in molten metal to form SiO₂, which is removed with slag.
- Efficient deoxidation improves the purity and toughness of steel.
Carbon Enhancer
- The carbon content in Si-C alloy helps increase the carbon percentage in steel or iron, which improves hardness, tensile strength, and wear resistance.
Slag Modifier
- Reduces the formation of sticky slags.
- Helps improve furnace fluidity and metal separation efficiency.
Cost Reducer
- Replaces multiple traditional materials (ferrosilicon + recarburizer + silicon carbide) with a single product.
- Reduces material costs and energy consumption.
Quality Testing Data
Here is a typical chemical composition of standard silicon carbon alloy grades:
| Element | Content (%) |
|---|---|
| Silicon (Si) | 60 – 72% |
| Carbon (C) | 15 – 20% |
| Sulfur (S) | ≤ 0.05% |
| Phosphorus (P) | ≤ 0.05% |
| Aluminum (Al) | ≤ 2.0% |
| Moisture | ≤ 0.5% |
Application of Silicon Carbon Alloy
Steelmaking Industry
Used as a composite deoxidizer and recarburizer in steel production.
Helps stabilize composition and enhances physical and mechanical properties of steel.
Foundry Industry
Widely used in gray cast iron, ductile iron, and carbon steel casting to enhance carbon content, improve graphite shape, and minimize defects.
Ferroalloy Production
Acts as a base alloy or additive in high-performance alloys.
Improves process efficiency and reduces raw material loss.
Environmental Benefit
Due to lower processing energy requirements and fewer additives needed, it's considered a more eco-friendly option.
Specification of Silicon Carbon
Physical Form
- Lump Size: 10–50mm, 10–100mm
- Granular Size: 3–10mm
- Powder Size: 0–3mm
Other sizes customizable upon request.
Packaging
- 25kg woven bags
- 1MT jumbo bags
- Ton bags with lining or as required
Grade Examples
| Grade | Si (%) | C (%) | S (%) | P (%) |
|---|---|---|---|---|
| Si60C15 | ≥60 | ≥15 | ≤0.05 | ≤0.05 |
| Si65C18 | ≥65 | ≥18 | ≤0.05 | ≤0.05 |
| Si70C20 | ≥70 | ≥20 | ≤0.05 | ≤0.05 |
FAQ
Q1: What's the main advantage of using silicon carbon alloy over ferrosilicon?
A: Silicon carbon alloy offers similar deoxidizing effects as ferrosilicon but with added carbon enrichment, making it more cost-efficient and multi-functional.
Q2: Is it suitable for replacing recarburizer too?
A: Yes, it can partially or fully replace recarburizer depending on the required carbon level and specific steel grade.
Q3: What is the recommended addition rate?
A: Typically 1–4% of the total molten metal weight, adjusted based on steel grade and production process.
Q4: Can you customize chemical composition?
A: Absolutely! We provide tailored formulations based on your process needs and technical requirements.
Q5: Where is your silicon carbon alloy produced?
A: Our production is based in Anyang City, Henan Province, China – a major hub for ferroalloy manufacturing.
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