Overview
Calcium Silicon (CaSi) is an alloy composed mainly of silicon (Si) and calcium (Ca), with small amounts of iron, aluminum, carbon, sulfur, and phosphorus. Typically supplied in lump or powder form, it is widely used in steelmaking and foundry industries for deoxidation, desulfurization, and improving metal properties.
Key Applications
**Deoxidizer in Steelmaking**
Silicon and calcium in CaSi remove oxygen impurities from molten steel. Calcium enhances steel purity and mechanical performance, ideal for premium low-oxygen steels.
**Desulfurizer**
CaSi reduces sulfur content in steel, minimizing sulfide inclusions to improve toughness and corrosion resistance. Used in high-strength and weather-resistant steels.
**Inoculant in Cast Iron Production**
Promotes graphite formation in cast iron, refining its microstructure to boost strength, ductility, and wear resistance. Common in nodular and gray cast iron.
**Inclusion Modification**
Refines oxide and sulfide inclusions in steel, enhancing machinability and surface quality. Critical for automotive and marine-grade steels.
**Other Uses**
Applied in specialty alloy steels, nickel-based alloys, and non-ferrous metal smelting as a reductant or additive.
Procurement Considerations
**Specifications**
Composition: Choose CaSi grades with 24%, 28%, or 31%+ calcium and 60–65% silicon; control sulfur/phosphorus levels.
Particle Size: Select lumps (10–50mm) or powder based on production needs.
Packaging: Opt for sealed ton bags or drums to prevent moisture.
**Supplier Selection**
Certifications: Prioritize ISO 9001-certified suppliers.
Production Methods: Verify advanced smelting technologies (e.g., electric furnaces) for consistent quality.
Reliability: Ensure stable supply chains and post-sales support.
**Impurity Control**
Require detailed composition reports to limit sulfur, phosphorus, and other contaminants.
**Storage & Transport**
Store in dry, ventilated areas. Use moisture-proof packaging during transit with clear safety labels.
**Cost Efficiency**
Compare prices, logistics, and product quality. Request samples for testing to balance cost and performance.
**Quality Inspection**
Post-delivery checks:
Composition analysis (Ca, Si, impurities).
Visual inspection (no dampness, powdering, or contamination).
Particle size screening.
LSFerroalloy’s Advantages
**Advanced Production**
Electric furnace smelting ensures precise Ca/Si ratios and low impurities.
**Quality Compliance**
ISO 9001-certified processes with rigorous testing for composition and particle size.
**Custom Solutions**
Adjust alloy composition and particle size to meet specific industrial needs.
**Stable Supply Chains**
Optimized production and logistics guarantee on-time delivery with competitive pricing.
**Eco-Friendly Practices**
Energy-efficient smelting and recycling of micro-silica powder for construction materials.
Conclusion
Calcium Silicon alloy is vital in the steel and foundry industries for deoxidation, desulfurization, and microstructural refinement. Buyers should prioritize specifications, impurity control, safe storage, and qualified suppliers. LSFerroalloy delivers high-performance CaSi alloys through technical expertise, rigorous quality management, and sustainable production practices.