Products Description
Calcium Silicide (CaSi) is a high-performance metallurgical alloy composed primarily of calcium and silicon. It is widely used in steelmaking as a powerful compound deoxidizer and desulfurizer. By effectively removing oxygen and sulfur impurities from molten steel, it significantly enhances the metal's cleanliness, mechanical properties, and overall quality.
Its key advantages include improved castability, reduced nozzle clogging, and the modification of non-metallic inclusions, resulting in superior toughness and ductility of final steel products. It is also used as an inoculant in cast iron production to promote the formation of nodular graphite.
Available in various sizes (lumps, granules, or powder) such as10-50mm and standard grades like CaSi28 and CaSi30, it is packaged in moisture-proof bags or ton bags for safe shipping and storage. Our CaSi alloy is manufactured under strict quality control, ensuring high purity, consistent composition, and reliable performance for industrial applications worldwide.
Specifications
| Grade | Ca (%) | Si (%) | Al (%) Max | C (%) Max | S (%) Max | F (%) Max |
|---|---|---|---|---|---|---|
| CaSi 30/60 | 30±2 | 58-65 | 1.4 | 1.0 | 0.05 | 0.04 |
| CaSi 28/55 | 28±2 | 55-65 | 1.4 | 1.0 | 0.05 | 0.04 |
🔹 Size: 10–50 mm (custom sizes available)
🔹 Packing: Jumbo bags, 1 MT big bag
🔹 Form: Lump or granule (can be processed into powder if needed)
Key Features & Benefits
Highly Efficient Deoxidation & Desulfurization: Reacts rapidly with oxygen and sulfur in molten steel, effectively removing impurities to prevent defects and improve steel cleanliness. This results in superior steel quality with enhanced toughness and durability.
Improved Metal Fluidity: The addition of our CaSi alloy improves the fluidity of molten metal, leading to better castability, reduced clogging in nozzles, and smoother continuous casting operations.
Control of Sulfide Inclusions: Modifies the morphology of sulfide inclusions, transforming them from harmful elongated types to harmless globular forms. This significantly increases the mechanical strength, impact toughness, and isotropy of the steel.
Increased Calcium Yield: Our product is formulated to have a higher and more stable calcium yield compared to pure calcium metals, offering better cost-effectiveness and predictable results in the ladle refining process.
Various Sizes for Easy Application: Available in multiple forms (Lumps, Powder, Cored Wire) to suit different application methods such as direct addition into the ladle or injection via cored wire, providing flexibility and operational convenience.
FAQ
What is the difference between Calcium Silicide and pure Calcium wire or Ferrocalcium?
A: Compared to pure calcium, CaSi has a lower melting point and higher vapor pressure, allowing it to dissolve and react in molten steel more gently and predictably. This results in a higher and more stable calcium yield, better cost-effectiveness, and enhanced operational safety. Unlike Ferrocalcium, CaSi provides a combined effect of both calcium and silicon, making it more efficient for complex refining processes.
Q: How is calcium silicon added to molten steel?
A: Direct addition (lumps/powder into ladle)
Q: How do I determine the right grade and size of CaSi for my specific process?
A: The optimal choice depends on your steel grade, target outcomes (deoxidation, desulfurization, modification), and addition method (injection, cored wire, direct addition). Please share your process parameters, and our technical team will recommend the most economical and efficient solution.
Q: What is the typical dosage or consumption rate of CaSi per ton of steel?
A: The dosage varies based on the initial sulfur content, target sulfur level, and specific refining practice. It typically ranges from 0.5 to 2.0 kg per metric ton of steel. We can provide a more precise recommendation based on your specific situation.
Q: What standards can your Calcium Silicide comply with?
A: We can produce various grades that comply with Chinese GB, international ISO, European EN standards, and also meet custom-specific customer requirements, such as CaSi28, CaSi30, and CaSi31..
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