Products Description
Silicon Calcium (SiCa) is a high-performance composite alloy composed primarily of silicon (Si), calcium (Ca), and iron (Fe). It is an essential material in modern steelmaking and foundry industries, serving as an efficient deoxidizer, desulfurizer, and inoculant.
Thanks to calcium's strong chemical affinity with oxygen and sulfur, Silicon Calcium significantly improves the cleanliness, fluidity, and mechanical properties of molten steel and cast iron.
Key Features & Benefits
Efficient Deoxidation – Removes oxygen from molten steel, reducing oxide inclusions and improving steel purity.
Effective Desulfurization – Reacts with sulfur to form stable calcium sulfides, reducing sulfur content in steel.
Prevents Nozzle Clogging – Modifies oxide inclusions, preventing clogging during continuous casting – a common issue when using aluminum alone.
Improves Fluidity – Enhances the flowability of molten metal, ensuring better casting results.
Promotes Graphite Nodulization – Acts as a powerful inoculant in ductile iron production, forming spherical graphite structures that greatly improve tensile strength and toughness.
Heat Generation – The exothermic reaction of calcium with oxygen provides additional heat, useful in converter steelmaking.
Typical Applications
| Application | Role of Silicon Calcium |
|---|---|
| Steelmaking | Deoxidizer and desulfurizer for high-quality steels (e.g., bearing steel, stainless steel, pipeline steel) |
| Continuous Casting | Prevents nozzle clogging; improves castability |
| Ductile Iron Production | Inoculant to promote graphite nodulization |
| Converter Steelmaking | Acts as a heating agent due to exothermic reaction |
Available Grades & Composition
| Grade | Calcium (Ca) | Silicon (Si) | Iron (Fe) & Impurities |
|---|---|---|---|
| Ca31Si60 | ≥ 31% | 50–65% | Balance |
| Ca28Si60 | ≥ 28% | 50–65% | Balance |
| Ca24Si60 | ≥ 24% | 55–65% | Balance |
| Ca20Si55 | ≥ 20% | 50–60% | Balance |
| Ca16Si55 | ≥ 16% | 50–60% | Balance |
Available Forms & Sizes
We offer Silicon Calcium in various physical forms to suit different smelting processes:
Lump – 10–50 mm, 10–100 mm (for ladle addition)
Granule – 1–3 mm, 3–10 mm (for automatic feeding)
Powder – 0–1 mm, 0–3 mm (for cored wire)
Cored Wire – Ø 13 mm, with CaSi powder inside (for deep injection)
Packaging Options
1 MT big bag
25 kg small bag (inner plastic + outer woven)
Steel drums
Custom packaging upon request
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