Products Description
Silicon Carbon (Si-C) is a high-performance composite alloy made from silicon (Si) and carbon (C), designed to serve dual purposes as both a deoxidizer and carburizer in steelmaking and casting processes. It is widely used in electric arc furnaces (EAFs), converters, and induction furnaces for refining molten metal and enhancing the mechanical properties of both steel and cast iron.
The integration of silicon and carbon in one alloy significantly simplifies the alloying process, improves carbon recovery, and lowers slag formation, making Silicon Carbon a preferred alternative to traditional ferroalloys like ferrosilicon and carbon additives.
Specification
| Grade | Si (%) | C (%) | S (%) | P (%) | Moisture | Size (mm) |
|---|---|---|---|---|---|---|
| SiC 65/15 | ≥65 | ≥15 | ≤0.05 | ≤0.05 | ≤1.0 | 0–3, 10–50 |
| SiC 60/20 | ≥60 | ≥20 | ≤0.05 | ≤0.05 | ≤1.0 | 1–10, Powder |
| SiC 55/25 | ≥55 | ≥25 | ≤0.05 | ≤0.05 | ≤1.0 | Custom available |
How Is Silicon Carbon Manufactured in Modern Factories?
In modern production facilities, Silicon Carbon is manufactured through electric arc smelting, which involves:
Raw Material Selection: High-purity silica (SiO₂) and carbon sources like anthracite or petroleum coke are precisely measured and mixed.
Smelting Process: The mixture is heated in a submerged arc furnace at temperatures exceeding 2000°C. At these extreme temperatures, silicon is reduced and reacts with carbon.
Cooling & Crushing: Once cooled, the resulting Silicon Carbon alloy is crushed and sieved into various particle sizes.
Quality Control: Each batch undergoes strict testing to ensure chemical composition consistency, low impurity levels, and particle size accuracy.
Our manufacturing process emphasizes energy efficiency, automation, and quality assurance, ensuring reliable, high-purity output.
How Does Silicon Carbon Help in Energy Saving During Melting?
Silicon Carbon contributes to energy savings in multiple ways:
⚡ Faster Melting: Its high reactivity promotes rapid exothermic reactions, speeding up melting and reducing furnace power consumption.
🔥 Improved Thermal Conductivity: The presence of carbon enhances heat transfer in molten metal, maintaining consistent temperatures with less energy input.
💡 Lower Slag Volume: Reduced slag formation means less energy is wasted on non-metallic reactions and less downtime for furnace cleaning.
⏱️ Shorter Processing Time: Efficient deoxidation and carburization reduce the number of additions needed, shortening overall production cycles.
By optimizing melting operations, Silicon Carbon allows foundries to cut energy costs while increasing output.
What Role Does Silicon Carbon Play in Ductile Iron?
In ductile (nodular) iron production, Silicon Carbon plays a critical metallurgical role:
🔹 Graphite Formation: The high carbon content supports the formation of nodular graphite, which improves ductility and strength.
🔹 Nodulization Support: Its balanced silicon content helps regulate the graphite nodulizing process, working effectively alongside nodulizers like FeSiMg.
🔹 Carbon Recovery: Enhances carbon pick-up in molten iron, reducing the need for separate carburizers and ensuring more stable chemistry.
🔹 Reduced Defects: Lowers sulfur and oxygen levels, minimizing gas-related casting defects and porosity.
Ultimately, the use of Silicon Carbon in ductile iron promotes stronger, cleaner castings with better mechanical performance and lower production costs.
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