Product Overview
Calcium Silicon (SiCa) is a vital composite alloy used extensively in steelmaking and foundry operations. It serves as a powerful deoxidizer, desulfurizer, and inclusion modifier, playing a critical role in producing clean steel and high-quality castings. Our Premium Calcium Silicon is manufactured under strict quality control to ensure consistent composition, reliable performance, and stable supply-backed by long-term production capacity and robust logistics.
Why Choose Our Calcium Silicon?
✅ Consistent Quality
Every batch is produced with tightly controlled chemistry to deliver predictable results in your steelmaking or foundry process. We provide certified mill test reports (MTRs) with every shipment.
✅ Stable Supply
With dedicated production lines and strong raw material partnerships, we ensure uninterrupted availability-even during market volatility. Our supply chain is built for reliability.
✅ Technical Support
Our metallurgical team is available to assist with application optimization, whether you're using calcium silicon in ladle addition or cored wire injection.
✅ Global Shipping
We have extensive export experience and can arrange flexible delivery to major ports worldwide.
Typical Chemical Composition
| Element | Specification (%) |
|---|---|
| Calcium (Ca) | 28–32 |
| Silicon (Si) | 55–65 |
| Carbon (C) | ≤ 1.0 |
| Aluminum (Al) | ≤ 1.5 |
| Phosphorus (P) | ≤ 0.05 |
| Sulfur (S) | ≤ 0.05 |
Note: Composition can be customized based on customer requirements.
Available Sizes
| Application | Size Range |
|---|---|
| Ladle addition | 10–50 mm, 10–70 mm |
| Cored wire injection | 0–2 mm, 0–3 mm |
| Custom sizes | Available upon request |
Key Applications
1. Steelmaking – Calcium Treatment
Calcium Silicon is widely used in secondary steelmaking to:
Modify alumina inclusions into low-melting-point calcium aluminates
Reduce nozzle clogging during continuous casting
Improve steel cleanliness and mechanical properties
2. Foundry – Inoculation
In cast iron production, Calcium Silicon serves as an effective inoculant:
Promotes Type A graphite formation
Reduces chilling tendency
Enhances machinability and consistency
3. Desulfurization
The calcium content provides strong desulfurization capability, contributing to cleaner metal and improved final product quality.
Case Study: Improving Castability for a Steel Mill in Türkiye
Background
A steel mill in Türkiye was experiencing frequent nozzle clogging during continuous casting of aluminum-killed low-carbon steel. The clogging led to production interruptions, increased refractory consumption, and reduced casting sequence lengths.
Challenge
The primary issue was high-melting-point alumina (Al₂O₃) inclusions that accumulated in the tundish nozzle. The mill's existing practice using aluminum deoxidation alone was insufficient to modify these inclusions into a less harmful form.
Solution
Our technical team recommended introducing a calcium treatment using our Premium Calcium Silicon in cored wire form. The calcium reacts with alumina to form liquid calcium aluminates, which have a much lower melting point and are less likely to adhere to the nozzle.
Implementation
Calcium Silicon cored wire was injected in the ladle furnace after aluminum deoxidation
Addition rates were optimized based on steel grade and aluminum content
Process parameters were fine-tuned in collaboration with the mill's metallurgical team
Results
| Parameter | Before Treatment | After Treatment |
|---|---|---|
| Nozzle clogging frequency | 3–4 times per sequence | 0–1 time per sequence |
| Casting sequence length | 4–6 heats | 8–10 heats |
| Total oxygen (T.O) in steel | 18–25 ppm | 10–15 ppm |
| Inclusion rating (ASTM) | >2.0 | ≤1.0 |
Customer Feedback
"Since implementing calcium treatment with your Calcium Silicon cored wire, our casting operations have become significantly more stable. We have virtually eliminated nozzle clogging and achieved a noticeable improvement in steel cleanliness."
Quality Assurance
We take quality seriously at every stage:
Raw material selection – Sourced from reputable suppliers
In-process control – Continuous monitoring during production
Final inspection – Third-party testing available upon request
Documentation – Full traceability with mill test certificates
Why Stable Supply Matters
In today's volatile market, supply chain reliability is just as important as product quality. We maintain:
Strategic raw material inventory
Multiple production lines to ensure capacity
Flexible shipping arrangements to meet tight delivery schedules
Whether you require a trial order or long-term contract, we are equipped to support your needs without interruption.
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