Calcium Silicon
Product Overview
Calcium Silicon (CaSi) is a powerful composite deoxidizer and desulfurizer composed primarily of silicon and calcium. It is widely used in steelmaking and foundry industries due to its strong deoxidizing ability, easy-floating by-products, and capacity to significantly improve steel properties.
|
Ca(≥) |
Si |
C(≤) |
Al(≤) |
P(≤) |
S(≤) |
|
|
Ca31Si60 |
31.0 |
55.0 - 65.0 |
0.8 |
2.4 |
0.04 |
0.06 |
|
Ca28Si60 |
28.0 |
55.0 - 65.0 |
0.8 |
2.4 |
0.04 |
0.06 |
|
Ca24Si60 |
24.0 |
55.0 - 65.0 |
0.8 |
2.5 |
0.04 |
0.04 |
Production Process
Primarily produced by the electrosilicothermic method: precisely proportioned raw materials including silica, lime, and coke are mixed and smelted at high temperatures in a submerged arc furnace. The calcium silicide melt obtained through chemical reaction is tapped, cast, cooled, and crushed into standard specifications (lumps 10-60mm, powder 0-10mm).
Applications
Steel Purification: Used as a final deoxidizer for deep deoxidation and desulfurization, especially in producing clean steel and special grades (e.g., pipeline steel, gear steel).
Foundry Inoculant: Serves as an inoculant in cast iron production to promote graphitization, refine graphite, and improve iron properties.
Cored Wire: The primary material for calcium-based cored wires used in precise secondary refining.
Key Features
Powerful Deoxidation: Calcium has a strong affinity for oxygen, ensuring thorough deoxidation.
Molten Steel Purification: Effectively removes harmful sulfur and oxygen from steel.
Improved Fluidity: Significantly enhances the fluidity of molten steel, benefiting casting operations.
Inclusion Modification: Alters inclusion morphology, greatly improving the mechanical properties of steel.
FAQ
Q: What are the main specifications?
A: Common grades include Ca28Si60, Ca30Si60 (meaning 28%-31% Ca, 55%-60% Si). Products with varying calcium content and particle size are available upon request.
Q: What are the storage requirements?
A: This alloy is hygroscopic and can powder. It must be stored sealed in a cool, dry warehouse and should not be stored outdoors for extended periods.
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