Product Overview
Calcium Silicon (CaSi) is a composite alloy made from calcium and silicon, typically produced by carbothermic reduction in a submerged electric arc furnace. It is widely used in the steelmaking and foundry industries as a powerful deoxidizer, desulfurizer, and inclusion modifier. Calcium Silicon is essential for producing high-quality clean steels and ductile cast irons.
Key Features
Strong Deoxidation: Calcium has a high affinity for oxygen, effectively removing oxides from molten steel.
Inclusion Modification: Converts hard, brittle alumina inclusions into lower-melting-point calcium aluminates that are less harmful to steel properties.
Desulfurization: Reduces sulfur content in steel, improving mechanical properties.
Sulfide Shape Control: Spheroidizes manganese sulfide (MnS) inclusions, enhancing toughness and machinability.
Carbide Stabilization (in cast iron): Promotes formation of spheroidal graphite in ductile iron production.
Product Specifications
| Parameter | Details |
|---|---|
| Chemical Formula | CaSi₂ / CaSi (various phases) |
| Appearance | Silver-gray to dark gray metallic solid |
| Density | Approx. 2.2 – 2.5 g/cm³ |
| Melting Point | 900 – 1,200°C (varies with composition) |
| Form Available | Lumps, granules, powder, cored wire |
Chemical Composition
| Grade | Ca (%) | Si (%) | Al (%) max | C (%) max | P (%) max | S (%) max |
|---|---|---|---|---|---|---|
| CaSi 30/60 | 28 – 32 | 55 – 65 | ≤ 1.5 | ≤ 0.5 | ≤ 0.04 | ≤ 0.05 |
| CaSi 28/60 | 26 – 30 | 55 – 65 | ≤ 2.0 | ≤ 1.0 | ≤ 0.04 | ≤ 0.05 |
| CaSi 31/60 | 30 – 33 | 55 – 65 | ≤ 1.5 | ≤ 0.5 | ≤ 0.04 | ≤ 0.05 |
| CaSi 28/55 | 26 – 30 | 50 – 60 | ≤ 2.0 | ≤ 1.0 | ≤ 0.04 | ≤ 0.05 |
Other compositions can be customized upon request.
Available Sizes
| Form | Size Range | Typical Application |
|---|---|---|
| Lump | 10 – 50 mm | Ladle addition, furnace addition |
| Lump | 10 – 100 mm | Bulk alloying |
| Granules | 0.2 – 2.5 mm | Cored wire filling, injection systems |
| Powder | 0 – 0.5 mm (or 100 mesh, 200 mesh) | Powder injection, briquettes |
| Cored Wire | 13 mm diameter (standard) | Wire feeding for precise ladle treatment |
Main Applications
| Industry | Application | Function |
|---|---|---|
| Steelmaking | Deoxidation | Removes oxygen from molten steel |
| Steelmaking | Inclusion modification | Transforms alumina into fluid calcium aluminates |
| Steelmaking | Desulfurization | Lowers sulfur content |
| Steelmaking | Sulfide shape control | Spheroidizes MnS inclusions for improved machinability |
| Foundry (Ductile Iron) | Nodularizer / Inoculant | Promotes spheroidal graphite formation |
Packaging & Shipping
| Package Type | Net Weight | Lining | Suitable For |
|---|---|---|---|
| Steel drum | 100 kg | Plastic bag | High-purity / small lots |
| Woven bag | 25 kg | Plastic inner bag | Granules / powder |
| Jumbo bag | 1000 kg (1 MT) | PE film lining | Bulk lumps |
| Cored wire coil | Approx. 1500 – 2000 kg per coil | Sealed plastic wrap | Wire feeder reels |
Palletization: Available with shrink-wrapped export pallets.
Container loading: Approx. 24 – 25 MT per 20 ft container (jumbo bags).
Storage & Handling
Store in a dry, well-ventilated warehouse.
Keep away from water and moisture - calcium reacts with water to release hydrogen gas.
Avoid contact with acids.
Use appropriate dust control measures when handling powder forms.
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